vikunja
/
vikunja
6
43
Fork 72
Code Issues 150 Pull Requests 19 Packages Releases 32 Activity

Update module src.techknowlogick.com/xormigrate to v1.2.0 - autoclosed #296

Closed
renovate wants to merge 1 commits from renovate/src.techknowlogick.com-xormigrate-1.x into master
pull from: renovate/src.techknowlogick.com-xormigrate-1.x
merge into: vikunja:master
Conversation 0 Commits 1 Files Changed 205 +26230 -5370
205 changed files with 26230 additions and 5370 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
go.mod
View File

@ -19,7 +19,6 @@ module code.vikunja.io/api
require (
4d63.com/embedfiles v1.0.0 // indirect
4d63.com/tz v1.1.0
cloud.google.com/go v0.37.4 // indirect
code.vikunja.io/web v0.0.0-20200208214421-c90649369427
gitea.com/xorm/tests v0.5.6 // indirect
gitea.com/xorm/xorm-redis-cache v0.0.0-20191113062523-5a6a9e2ab9f2
@ -33,7 +32,6 @@ require (
github.com/dgrijalva/jwt-go v3.2.0+incompatible
github.com/fzipp/gocyclo v0.0.0-20150627053110-6acd4345c835
github.com/garyburd/redigo v1.6.0 // indirect
github.com/go-logfmt/logfmt v0.4.0 // indirect
github.com/go-openapi/jsonreference v0.19.3 // indirect
github.com/go-openapi/spec v0.19.4 // indirect
github.com/go-redis/redis v6.15.7+incompatible
@ -77,10 +75,10 @@ require (
gopkg.in/gomail.v2 v2.0.0-20160411212932-81ebce5c23df
honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a
src.techknowlogick.com/xgo v0.0.0-20200408234745-bb0faa361273
src.techknowlogick.com/xormigrate v1.1.0
xorm.io/builder v0.3.6
src.techknowlogick.com/xormigrate v1.2.0
xorm.io/builder v0.3.7
xorm.io/core v0.7.3
xorm.io/xorm v0.8.1
xorm.io/xorm v1.0.1
)
replace github.com/samedi/caldav-go => github.com/kolaente/caldav-go v3.0.1-0.20190524174923-9e5cd1688227+incompatible // Branch: feature/dynamic-supported-components, PR: https://github.com/samedi/caldav-go/pull/6 and https://github.com/samedi/caldav-go/pull/7

11
go.sum
View File

@ -11,6 +11,7 @@ cloud.google.com/go v0.37.4 h1:glPeL3BQJsbF6aIIYfZizMwc5LTYz250bDMjttbBGAU=
cloud.google.com/go v0.37.4/go.mod h1:NHPJ89PdicEuT9hdPXMROBD91xc5uRDxsMtSB16k7hw=
code.vikunja.io/web v0.0.0-20200208214421-c90649369427 h1:6ps5r0OxZNRdmCavh1k/xMwftN27hHauo+EtdTGxLug=
code.vikunja.io/web v0.0.0-20200208214421-c90649369427/go.mod h1:cuP1/ieGWAZzgQGw+QPt6Y5F0fVb/8Ol5NV4QSezGdo=
gitea.com/xorm/sqlfiddle v0.0.0-20180821085327-62ce714f951a/go.mod h1:EXuID2Zs0pAQhH8yz+DNjUbjppKQzKFAn28TMYPB6IU=
gitea.com/xorm/tests v0.5.6 h1:bm5SwZD5B6LI4VinKf5bqOCJ8z3z5l0h43HkVuxZG3k=
gitea.com/xorm/tests v0.5.6/go.mod h1:53b8exJwT/5JBCf5n5gMqKrIZAqIErdJCRtzS1AuiMM=
gitea.com/xorm/xorm-redis-cache v0.0.0-20191113062523-5a6a9e2ab9f2 h1:85jEhrFlzlDrJ+CXoCQ24WtkZ7MEtt8yOYZuC9ewKyk=
@ -149,6 +150,8 @@ github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5y
github.com/golang/protobuf v1.3.2 h1:6nsPYzhq5kReh6QImI3k5qWzO4PEbvbIW2cwSfR/6xs=
github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
github.com/golang/snappy v0.0.1 h1:Qgr9rKW7uDUkrbSmQeiDsGa8SjGyCOGtuasMWwvp2P4=
github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
github.com/google/go-cmp v0.2.0 h1:+dTQ8DZQJz0Mb/HjFlkptS1FeQ4cWSnN941F8aEG4SQ=
@ -370,6 +373,8 @@ github.com/swaggo/gin-swagger v1.2.0/go.mod h1:qlH2+W7zXGZkczuL+r2nEBR2JTT+/lX05
github.com/swaggo/swag v1.5.1/go.mod h1:1Bl9F/ZBpVWh22nY0zmYyASPO1lI/zIwRDrpZU+tv8Y=
github.com/swaggo/swag v1.6.3 h1:N+uVPGP4H2hXoss2pt5dctoSUPKKRInr6qcTMOm0usI=
github.com/swaggo/swag v1.6.3/go.mod h1:wcc83tB4Mb2aNiL/HP4MFeQdpHUrca+Rp/DRNgWAUio=
github.com/syndtr/goleveldb v1.0.0 h1:fBdIW9lB4Iz0n9khmH8w27SJ3QEJ7+IgjPEwGSZiFdE=
github.com/syndtr/goleveldb v1.0.0/go.mod h1:ZVVdQEZoIme9iO1Ch2Jdy24qqXrMMOU6lpPAyBWyWuQ=
github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U=
github.com/ugorji/go v1.1.1/go.mod h1:hnLbHMwcvSihnDhEfx2/BzKp2xb0Y+ErdfYcrs9tkJQ=
github.com/ugorji/go v1.1.4/go.mod h1:uQMGLiO92mf5W77hV/PUCpI3pbzQx3CRekS0kk+RGrc=
@ -550,8 +555,12 @@ src.techknowlogick.com/xgo v0.0.0-20200408234745-bb0faa361273 h1:dE6ry9rVwDn3soD
src.techknowlogick.com/xgo v0.0.0-20200408234745-bb0faa361273/go.mod h1:31CE1YKtDOrKTk9PSnjTpe6YbO6W/0LTYZ1VskL09oU=
src.techknowlogick.com/xormigrate v1.1.0 h1:Ob79c1pOO+voMB9roa2eHZByT+TODwC51+Mn9e3HoTI=
src.techknowlogick.com/xormigrate v1.1.0/go.mod h1:IMdvIk60uPX+IUsaXbdtqFzl3n7PfRg/cSZxxsiCWf8=
src.techknowlogick.com/xormigrate v1.2.0 h1:bq9JaI48bxB+OddMghicjmV7sGmBUogJq4HmTN0DOcw=
src.techknowlogick.com/xormigrate v1.2.0/go.mod h1:7so27LAfBRqAxbma5jKYeL4ykVG1Jhsv9ncSq1KBCs4=
xorm.io/builder v0.3.6 h1:ha28mQ2M+TFx96Hxo+iq6tQgnkC9IZkM6D8w9sKHHF8=
xorm.io/builder v0.3.6/go.mod h1:LEFAPISnRzG+zxaxj2vPicRwz67BdhFreKg8yv8/TgU=
xorm.io/builder v0.3.7 h1:2pETdKRK+2QG4mLX4oODHEhn5Z8j1m8sXa7jfu+/SZI=
xorm.io/builder v0.3.7/go.mod h1:aUW0S9eb9VCaPohFCH3j7czOx1PMW3i1HrSzbLYGBSE=
xorm.io/core v0.7.2-0.20190928055935-90aeac8d08eb/go.mod h1:jJfd0UAEzZ4t87nbQYtVjmqpIODugN6PD2D9E+dJvdM=
xorm.io/core v0.7.2 h1:mEO22A2Z7a3fPaZMk6gKL/jMD80iiyNwRrX5HOv3XLw=
xorm.io/core v0.7.2/go.mod h1:jJfd0UAEzZ4t87nbQYtVjmqpIODugN6PD2D9E+dJvdM=
@ -559,3 +568,5 @@ xorm.io/core v0.7.3 h1:W8ws1PlrnkS1CZU1YWaYLMQcQilwAmQXU0BJDJon+H0=
xorm.io/core v0.7.3/go.mod h1:jJfd0UAEzZ4t87nbQYtVjmqpIODugN6PD2D9E+dJvdM=
xorm.io/xorm v0.8.1 h1:4f2KXuQxVdaX3RdI3Fw81NzMiSpZeyCZt8m3sEVeIkQ=
xorm.io/xorm v0.8.1/go.mod h1:ZkJLEYLoVyg7amJK/5r779bHyzs2AU8f8VMiP6BM7uY=
xorm.io/xorm v1.0.1 h1:/lITxpJtkZauNpdzj+L9CN/3OQxZaABrbergMcJu+Cw=
xorm.io/xorm v1.0.1/go.mod h1:o4vnEsQ5V2F1/WK6w4XTwmiWJeGj82tqjAnHe44wVHY=

16
vendor/github.com/golang/snappy/.gitignore generated vendored Normal file
View File

@ -0,0 +1,16 @@
cmd/snappytool/snappytool
testdata/bench
# These explicitly listed benchmark data files are for an obsolete version of
# snappy_test.go.
testdata/alice29.txt
testdata/asyoulik.txt
testdata/fireworks.jpeg
testdata/geo.protodata
testdata/html
testdata/html_x_4
testdata/kppkn.gtb
testdata/lcet10.txt
testdata/paper-100k.pdf
testdata/plrabn12.txt
testdata/urls.10K

15
vendor/github.com/golang/snappy/AUTHORS generated vendored Normal file
View File

@ -0,0 +1,15 @@
# This is the official list of Snappy-Go authors for copyright purposes.
# This file is distinct from the CONTRIBUTORS files.
# See the latter for an explanation.
# Names should be added to this file as
# Name or Organization <email address>
# The email address is not required for organizations.
# Please keep the list sorted.
Damian Gryski <dgryski@gmail.com>
Google Inc.
Jan Mercl <0xjnml@gmail.com>
Rodolfo Carvalho <rhcarvalho@gmail.com>
Sebastien Binet <seb.binet@gmail.com>

37
vendor/github.com/golang/snappy/CONTRIBUTORS generated vendored Normal file
View File

@ -0,0 +1,37 @@
# This is the official list of people who can contribute
# (and typically have contributed) code to the Snappy-Go repository.
# The AUTHORS file lists the copyright holders; this file
# lists people. For example, Google employees are listed here
# but not in AUTHORS, because Google holds the copyright.
#
# The submission process automatically checks to make sure
# that people submitting code are listed in this file (by email address).
#
# Names should be added to this file only after verifying that
# the individual or the individual's organization has agreed to
# the appropriate Contributor License Agreement, found here:
#
# http://code.google.com/legal/individual-cla-v1.0.html
# http://code.google.com/legal/corporate-cla-v1.0.html
#
# The agreement for individuals can be filled out on the web.
#
# When adding J Random Contributor's name to this file,
# either J's name or J's organization's name should be
# added to the AUTHORS file, depending on whether the
# individual or corporate CLA was used.
# Names should be added to this file like so:
# Name <email address>
# Please keep the list sorted.
Damian Gryski <dgryski@gmail.com>
Jan Mercl <0xjnml@gmail.com>
Kai Backman <kaib@golang.org>
Marc-Antoine Ruel <maruel@chromium.org>
Nigel Tao <nigeltao@golang.org>
Rob Pike <r@golang.org>
Rodolfo Carvalho <rhcarvalho@gmail.com>
Russ Cox <rsc@golang.org>
Sebastien Binet <seb.binet@gmail.com>

27
vendor/github.com/golang/snappy/LICENSE generated vendored Normal file
View File

@ -0,0 +1,27 @@
Copyright (c) 2011 The Snappy-Go Authors. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* Neither the name of Google Inc. nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

107
vendor/github.com/golang/snappy/README generated vendored Normal file
View File

@ -0,0 +1,107 @@
The Snappy compression format in the Go programming language.
To download and install from source:
$ go get github.com/golang/snappy
Unless otherwise noted, the Snappy-Go source files are distributed
under the BSD-style license found in the LICENSE file.
Benchmarks.
The golang/snappy benchmarks include compressing (Z) and decompressing (U) ten
or so files, the same set used by the C++ Snappy code (github.com/google/snappy
and note the "google", not "golang"). On an "Intel(R) Core(TM) i7-3770 CPU @
3.40GHz", Go's GOARCH=amd64 numbers as of 2016-05-29:
"go test -test.bench=."
_UFlat0-8 2.19GB/s ± 0% html
_UFlat1-8 1.41GB/s ± 0% urls
_UFlat2-8 23.5GB/s ± 2% jpg
_UFlat3-8 1.91GB/s ± 0% jpg_200
_UFlat4-8 14.0GB/s ± 1% pdf
_UFlat5-8 1.97GB/s ± 0% html4
_UFlat6-8 814MB/s ± 0% txt1
_UFlat7-8 785MB/s ± 0% txt2
_UFlat8-8 857MB/s ± 0% txt3
_UFlat9-8 719MB/s ± 1% txt4
_UFlat10-8 2.84GB/s ± 0% pb
_UFlat11-8 1.05GB/s ± 0% gaviota
_ZFlat0-8 1.04GB/s ± 0% html
_ZFlat1-8 534MB/s ± 0% urls
_ZFlat2-8 15.7GB/s ± 1% jpg
_ZFlat3-8 740MB/s ± 3% jpg_200
_ZFlat4-8 9.20GB/s ± 1% pdf
_ZFlat5-8 991MB/s ± 0% html4
_ZFlat6-8 379MB/s ± 0% txt1
_ZFlat7-8 352MB/s ± 0% txt2
_ZFlat8-8 396MB/s ± 1% txt3
_ZFlat9-8 327MB/s ± 1% txt4
_ZFlat10-8 1.33GB/s ± 1% pb
_ZFlat11-8 605MB/s ± 1% gaviota
"go test -test.bench=. -tags=noasm"
_UFlat0-8 621MB/s ± 2% html
_UFlat1-8 494MB/s ± 1% urls
_UFlat2-8 23.2GB/s ± 1% jpg
_UFlat3-8 1.12GB/s ± 1% jpg_200
_UFlat4-8 4.35GB/s ± 1% pdf
_UFlat5-8 609MB/s ± 0% html4
_UFlat6-8 296MB/s ± 0% txt1
_UFlat7-8 288MB/s ± 0% txt2
_UFlat8-8 309MB/s ± 1% txt3
_UFlat9-8 280MB/s ± 1% txt4
_UFlat10-8 753MB/s ± 0% pb
_UFlat11-8 400MB/s ± 0% gaviota
_ZFlat0-8 409MB/s ± 1% html
_ZFlat1-8 250MB/s ± 1% urls
_ZFlat2-8 12.3GB/s ± 1% jpg
_ZFlat3-8 132MB/s ± 0% jpg_200
_ZFlat4-8 2.92GB/s ± 0% pdf
_ZFlat5-8 405MB/s ± 1% html4
_ZFlat6-8 179MB/s ± 1% txt1
_ZFlat7-8 170MB/s ± 1% txt2
_ZFlat8-8 189MB/s ± 1% txt3
_ZFlat9-8 164MB/s ± 1% txt4
_ZFlat10-8 479MB/s ± 1% pb
_ZFlat11-8 270MB/s ± 1% gaviota
For comparison (Go's encoded output is byte-for-byte identical to C++'s), here
are the numbers from C++ Snappy's
make CXXFLAGS="-O2 -DNDEBUG -g" clean snappy_unittest.log && cat snappy_unittest.log
BM_UFlat/0 2.4GB/s html
BM_UFlat/1 1.4GB/s urls
BM_UFlat/2 21.8GB/s jpg
BM_UFlat/3 1.5GB/s jpg_200
BM_UFlat/4 13.3GB/s pdf
BM_UFlat/5 2.1GB/s html4
BM_UFlat/6 1.0GB/s txt1
BM_UFlat/7 959.4MB/s txt2
BM_UFlat/8 1.0GB/s txt3
BM_UFlat/9 864.5MB/s txt4
BM_UFlat/10 2.9GB/s pb
BM_UFlat/11 1.2GB/s gaviota
BM_ZFlat/0 944.3MB/s html (22.31 %)
BM_ZFlat/1 501.6MB/s urls (47.78 %)
BM_ZFlat/2 14.3GB/s jpg (99.95 %)
BM_ZFlat/3 538.3MB/s jpg_200 (73.00 %)
BM_ZFlat/4 8.3GB/s pdf (83.30 %)
BM_ZFlat/5 903.5MB/s html4 (22.52 %)
BM_ZFlat/6 336.0MB/s txt1 (57.88 %)
BM_ZFlat/7 312.3MB/s txt2 (61.91 %)
BM_ZFlat/8 353.1MB/s txt3 (54.99 %)
BM_ZFlat/9 289.9MB/s txt4 (66.26 %)
BM_ZFlat/10 1.2GB/s pb (19.68 %)
BM_ZFlat/11 527.4MB/s gaviota (37.72 %)

237
vendor/github.com/golang/snappy/decode.go generated vendored Normal file
View File

@ -0,0 +1,237 @@
// Copyright 2011 The Snappy-Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package snappy
import (
"encoding/binary"
"errors"
"io"
)
var (
// ErrCorrupt reports that the input is invalid.
ErrCorrupt = errors.New("snappy: corrupt input")
// ErrTooLarge reports that the uncompressed length is too large.
ErrTooLarge = errors.New("snappy: decoded block is too large")
// ErrUnsupported reports that the input isn't supported.
ErrUnsupported = errors.New("snappy: unsupported input")
errUnsupportedLiteralLength = errors.New("snappy: unsupported literal length")
)
// DecodedLen returns the length of the decoded block.
func DecodedLen(src []byte) (int, error) {
v, _, err := decodedLen(src)
return v, err
}
// decodedLen returns the length of the decoded block and the number of bytes
// that the length header occupied.
func decodedLen(src []byte) (blockLen, headerLen int, err error) {
v, n := binary.Uvarint(src)
if n <= 0 || v > 0xffffffff {
return 0, 0, ErrCorrupt
}
const wordSize = 32 << (^uint(0) >> 32 & 1)
if wordSize == 32 && v > 0x7fffffff {
return 0, 0, ErrTooLarge
}
return int(v), n, nil
}
const (
decodeErrCodeCorrupt = 1
decodeErrCodeUnsupportedLiteralLength = 2
)
// Decode returns the decoded form of src. The returned slice may be a sub-
// slice of dst if dst was large enough to hold the entire decoded block.
// Otherwise, a newly allocated slice will be returned.
//
// The dst and src must not overlap. It is valid to pass a nil dst.
func Decode(dst, src []byte) ([]byte, error) {
dLen, s, err := decodedLen(src)
if err != nil {
return nil, err
}
if dLen <= len(dst) {
dst = dst[:dLen]
} else {
dst = make([]byte, dLen)
}
switch decode(dst, src[s:]) {
case 0:
return dst, nil
case decodeErrCodeUnsupportedLiteralLength:
return nil, errUnsupportedLiteralLength
}
return nil, ErrCorrupt
}
// NewReader returns a new Reader that decompresses from r, using the framing
// format described at
// https://github.com/google/snappy/blob/master/framing_format.txt
func NewReader(r io.Reader) *Reader {
return &Reader{
r: r,
decoded: make([]byte, maxBlockSize),
buf: make([]byte, maxEncodedLenOfMaxBlockSize+checksumSize),
}
}
// Reader is an io.Reader that can read Snappy-compressed bytes.
type Reader struct {
r io.Reader
err error
decoded []byte
buf []byte
// decoded[i:j] contains decoded bytes that have not yet been passed on.
i, j int
readHeader bool
}
// Reset discards any buffered data, resets all state, and switches the Snappy
// reader to read from r. This permits reusing a Reader rather than allocating
// a new one.
func (r *Reader) Reset(reader io.Reader) {
r.r = reader
r.err = nil
r.i = 0
r.j = 0
r.readHeader = false
}
func (r *Reader) readFull(p []byte, allowEOF bool) (ok bool) {
if _, r.err = io.ReadFull(r.r, p); r.err != nil {
if r.err == io.ErrUnexpectedEOF || (r.err == io.EOF && !allowEOF) {
r.err = ErrCorrupt
}
return false
}
return true
}
// Read satisfies the io.Reader interface.
func (r *Reader) Read(p []byte) (int, error) {
if r.err != nil {
return 0, r.err
}
for {
if r.i < r.j {
n := copy(p, r.decoded[r.i:r.j])
r.i += n
return n, nil
}
if !r.readFull(r.buf[:4], true) {
return 0, r.err
}
chunkType := r.buf[0]
if !r.readHeader {
if chunkType != chunkTypeStreamIdentifier {
r.err = ErrCorrupt
return 0, r.err
}
r.readHeader = true
}
chunkLen := int(r.buf[1]) | int(r.buf[2])<<8 | int(r.buf[3])<<16
if chunkLen > len(r.buf) {
r.err = ErrUnsupported
return 0, r.err
}
// The chunk types are specified at
// https://github.com/google/snappy/blob/master/framing_format.txt
switch chunkType {
case chunkTypeCompressedData:
// Section 4.2. Compressed data (chunk type 0x00).
if chunkLen < checksumSize {
r.err = ErrCorrupt
return 0, r.err
}
buf := r.buf[:chunkLen]
if !r.readFull(buf, false) {
return 0, r.err
}
checksum := uint32(buf[0]) | uint32(buf[1])<<8 | uint32(buf[2])<<16 | uint32(buf[3])<<24
buf = buf[checksumSize:]
n, err := DecodedLen(buf)
if err != nil {
r.err = err
return 0, r.err
}
if n > len(r.decoded) {
r.err = ErrCorrupt
return 0, r.err
}
if _, err := Decode(r.decoded, buf); err != nil {
r.err = err
return 0, r.err
}
if crc(r.decoded[:n]) != checksum {
r.err = ErrCorrupt
return 0, r.err
}
r.i, r.j = 0, n
continue
case chunkTypeUncompressedData:
// Section 4.3. Uncompressed data (chunk type 0x01).
if chunkLen < checksumSize {
r.err = ErrCorrupt
return 0, r.err
}
buf := r.buf[:checksumSize]
if !r.readFull(buf, false) {
return 0, r.err
}
checksum := uint32(buf[0]) | uint32(buf[1])<<8 | uint32(buf[2])<<16 | uint32(buf[3])<<24
// Read directly into r.decoded instead of via r.buf.
n := chunkLen - checksumSize
if n > len(r.decoded) {
r.err = ErrCorrupt
return 0, r.err
}
if !r.readFull(r.decoded[:n], false) {
return 0, r.err
}
if crc(r.decoded[:n]) != checksum {
r.err = ErrCorrupt
return 0, r.err
}
r.i, r.j = 0, n
continue
case chunkTypeStreamIdentifier:
// Section 4.1. Stream identifier (chunk type 0xff).
if chunkLen != len(magicBody) {
r.err = ErrCorrupt
return 0, r.err
}
if !r.readFull(r.buf[:len(magicBody)], false) {
return 0, r.err
}
for i := 0; i < len(magicBody); i++ {
if r.buf[i] != magicBody[i] {
r.err = ErrCorrupt
return 0, r.err
}
}
continue
}
if chunkType <= 0x7f {
// Section 4.5. Reserved unskippable chunks (chunk types 0x02-0x7f).
r.err = ErrUnsupported
return 0, r.err
}
// Section 4.4 Padding (chunk type 0xfe).
// Section 4.6. Reserved skippable chunks (chunk types 0x80-0xfd).
if !r.readFull(r.buf[:chunkLen], false) {
return 0, r.err
}
}
}

14
vendor/github.com/golang/snappy/decode_amd64.go generated vendored Normal file
View File

@ -0,0 +1,14 @@
// Copyright 2016 The Snappy-Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build !appengine
// +build gc
// +build !noasm
package snappy
// decode has the same semantics as in decode_other.go.
//
//go:noescape
func decode(dst, src []byte) int

490
vendor/github.com/golang/snappy/decode_amd64.s generated vendored Normal file
View File

@ -0,0 +1,490 @@
// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build !appengine
// +build gc
// +build !noasm
#include "textflag.h"
// The asm code generally follows the pure Go code in decode_other.go, except
// where marked with a "!!!".
// func decode(dst, src []byte) int
//
// All local variables fit into registers. The non-zero stack size is only to
// spill registers and push args when issuing a CALL. The register allocation:
// - AX scratch
// - BX scratch
// - CX length or x
// - DX offset
// - SI &src[s]
// - DI &dst[d]
// + R8 dst_base
// + R9 dst_len
// + R10 dst_base + dst_len
// + R11 src_base
// + R12 src_len
// + R13 src_base + src_len
// - R14 used by doCopy
// - R15 used by doCopy
//
// The registers R8-R13 (marked with a "+") are set at the start of the
// function, and after a CALL returns, and are not otherwise modified.
//
// The d variable is implicitly DI - R8, and len(dst)-d is R10 - DI.
// The s variable is implicitly SI - R11, and len(src)-s is R13 - SI.
TEXT ·decode(SB), NOSPLIT, $48-56
// Initialize SI, DI and R8-R13.
MOVQ dst_base+0(FP), R8
MOVQ dst_len+8(FP), R9
MOVQ R8, DI
MOVQ R8, R10
ADDQ R9, R10
MOVQ src_base+24(FP), R11
MOVQ src_len+32(FP), R12
MOVQ R11, SI
MOVQ R11, R13
ADDQ R12, R13
loop:
// for s < len(src)
CMPQ SI, R13
JEQ end
// CX = uint32(src[s])
//
// switch src[s] & 0x03
MOVBLZX (SI), CX
MOVL CX, BX
ANDL $3, BX
CMPL BX, $1
JAE tagCopy
// ----------------------------------------
// The code below handles literal tags.
// case tagLiteral:
// x := uint32(src[s] >> 2)
// switch
SHRL $2, CX
CMPL CX, $60
JAE tagLit60Plus
// case x < 60:
// s++
INCQ SI
doLit:
// This is the end of the inner "switch", when we have a literal tag.
//
// We assume that CX == x and x fits in a uint32, where x is the variable
// used in the pure Go decode_other.go code.
// length = int(x) + 1
//
// Unlike the pure Go code, we don't need to check if length <= 0 because
// CX can hold 64 bits, so the increment cannot overflow.
INCQ CX
// Prepare to check if copying length bytes will run past the end of dst or
// src.
//
// AX = len(dst) - d
// BX = len(src) - s
MOVQ R10, AX
SUBQ DI, AX
MOVQ R13, BX
SUBQ SI, BX
// !!! Try a faster technique for short (16 or fewer bytes) copies.
//
// if length > 16 || len(dst)-d < 16 || len(src)-s < 16 {
// goto callMemmove // Fall back on calling runtime·memmove.
// }
//
// The C++ snappy code calls this TryFastAppend. It also checks len(src)-s
// against 21 instead of 16, because it cannot assume that all of its input
// is contiguous in memory and so it needs to leave enough source bytes to
// read the next tag without refilling buffers, but Go's Decode assumes
// contiguousness (the src argument is a []byte).
CMPQ CX, $16
JGT callMemmove
CMPQ AX, $16
JLT callMemmove
CMPQ BX, $16
JLT callMemmove
// !!! Implement the copy from src to dst as a 16-byte load and store.
// (Decode's documentation says that dst and src must not overlap.)
//
// This always copies 16 bytes, instead of only length bytes, but that's
// OK. If the input is a valid Snappy encoding then subsequent iterations
// will fix up the overrun. Otherwise, Decode returns a nil []byte (and a
// non-nil error), so the overrun will be ignored.
//
// Note that on amd64, it is legal and cheap to issue unaligned 8-byte or
// 16-byte loads and stores. This technique probably wouldn't be as
// effective on architectures that are fussier about alignment.
MOVOU 0(SI), X0
MOVOU X0, 0(DI)
// d += length
// s += length
ADDQ CX, DI
ADDQ CX, SI
JMP loop
callMemmove:
// if length > len(dst)-d || length > len(src)-s { etc }
CMPQ CX, AX
JGT errCorrupt
CMPQ CX, BX
JGT errCorrupt
// copy(dst[d:], src[s:s+length])
//
// This means calling runtime·memmove(&dst[d], &src[s], length), so we push
// DI, SI and CX as arguments. Coincidentally, we also need to spill those
// three registers to the stack, to save local variables across the CALL.
MOVQ DI, 0(SP)
MOVQ SI, 8(SP)
MOVQ CX, 16(SP)
MOVQ DI, 24(SP)
MOVQ SI, 32(SP)
MOVQ CX, 40(SP)
CALL runtime·memmove(SB)
// Restore local variables: unspill registers from the stack and
// re-calculate R8-R13.
MOVQ 24(SP), DI
MOVQ 32(SP), SI
MOVQ 40(SP), CX
MOVQ dst_base+0(FP), R8
MOVQ dst_len+8(FP), R9
MOVQ R8, R10
ADDQ R9, R10
MOVQ src_base+24(FP), R11
MOVQ src_len+32(FP), R12
MOVQ R11, R13
ADDQ R12, R13
// d += length
// s += length
ADDQ CX, DI
ADDQ CX, SI
JMP loop
tagLit60Plus:
// !!! This fragment does the
//
// s += x - 58; if uint(s) > uint(len(src)) { etc }
//
// checks. In the asm version, we code it once instead of once per switch case.
ADDQ CX, SI
SUBQ $58, SI
MOVQ SI, BX
SUBQ R11, BX
CMPQ BX, R12
JA errCorrupt
// case x == 60:
CMPL CX, $61
JEQ tagLit61
JA tagLit62Plus
// x = uint32(src[s-1])
MOVBLZX -1(SI), CX
JMP doLit
tagLit61:
// case x == 61:
// x = uint32(src[s-2]) | uint32(src[s-1])<<8
MOVWLZX -2(SI), CX
JMP doLit
tagLit62Plus:
CMPL CX, $62
JA tagLit63
// case x == 62:
// x = uint32(src[s-3]) | uint32(src[s-2])<<8 | uint32(src[s-1])<<16
MOVWLZX -3(SI), CX
MOVBLZX -1(SI), BX
SHLL $16, BX
ORL BX, CX
JMP doLit
tagLit63:
// case x == 63:
// x = uint32(src[s-4]) | uint32(src[s-3])<<8 | uint32(src[s-2])<<16 | uint32(src[s-1])<<24
MOVL -4(SI), CX
JMP doLit
// The code above handles literal tags.
// ----------------------------------------
// The code below handles copy tags.
tagCopy4:
// case tagCopy4:
// s += 5
ADDQ $5, SI
// if uint(s) > uint(len(src)) { etc }
MOVQ SI, BX
SUBQ R11, BX
CMPQ BX, R12
JA errCorrupt
// length = 1 + int(src[s-5])>>2
SHRQ $2, CX
INCQ CX
// offset = int(uint32(src[s-4]) | uint32(src[s-3])<<8 | uint32(src[s-2])<<16 | uint32(src[s-1])<<24)
MOVLQZX -4(SI), DX
JMP doCopy
tagCopy2:
// case tagCopy2:
// s += 3
ADDQ $3, SI
// if uint(s) > uint(len(src)) { etc }
MOVQ SI, BX
SUBQ R11, BX
CMPQ BX, R12
JA errCorrupt
// length = 1 + int(src[s-3])>>2
SHRQ $2, CX
INCQ CX
// offset = int(uint32(src[s-2]) | uint32(src[s-1])<<8)
MOVWQZX -2(SI), DX
JMP doCopy
tagCopy:
// We have a copy tag. We assume that:
// - BX == src[s] & 0x03
// - CX == src[s]
CMPQ BX, $2
JEQ tagCopy2
JA tagCopy4
// case tagCopy1:
// s += 2
ADDQ $2, SI
// if uint(s) > uint(len(src)) { etc }
MOVQ SI, BX
SUBQ R11, BX
CMPQ BX, R12
JA errCorrupt
// offset = int(uint32(src[s-2])&0xe0<<3 | uint32(src[s-1]))
MOVQ CX, DX
ANDQ $0xe0, DX
SHLQ $3, DX
MOVBQZX -1(SI), BX
ORQ BX, DX
// length = 4 + int(src[s-2])>>2&0x7
SHRQ $2, CX
ANDQ $7, CX
ADDQ $4, CX
doCopy:
// This is the end of the outer "switch", when we have a copy tag.
//
// We assume that:
// - CX == length && CX > 0
// - DX == offset
// if offset <= 0 { etc }
CMPQ DX, $0
JLE errCorrupt
// if d < offset { etc }
MOVQ DI, BX
SUBQ R8, BX
CMPQ BX, DX
JLT errCorrupt
// if length > len(dst)-d { etc }
MOVQ R10, BX
SUBQ DI, BX
CMPQ CX, BX
JGT errCorrupt
// forwardCopy(dst[d:d+length], dst[d-offset:]); d += length
//
// Set:
// - R14 = len(dst)-d
// - R15 = &dst[d-offset]
MOVQ R10, R14
SUBQ DI, R14
MOVQ DI, R15
SUBQ DX, R15
// !!! Try a faster technique for short (16 or fewer bytes) forward copies.
//
// First, try using two 8-byte load/stores, similar to the doLit technique
// above. Even if dst[d:d+length] and dst[d-offset:] can overlap, this is
// still OK if offset >= 8. Note that this has to be two 8-byte load/stores
// and not one 16-byte load/store, and the first store has to be before the
// second load, due to the overlap if offset is in the range [8, 16).
//
// if length > 16 || offset < 8 || len(dst)-d < 16 {
// goto slowForwardCopy
// }
// copy 16 bytes
// d += length
CMPQ CX, $16
JGT slowForwardCopy
CMPQ DX, $8
JLT slowForwardCopy
CMPQ R14, $16
JLT slowForwardCopy
MOVQ 0(R15), AX
MOVQ AX, 0(DI)
MOVQ 8(R15), BX
MOVQ BX, 8(DI)
ADDQ CX, DI
JMP loop
slowForwardCopy:
// !!! If the forward copy is longer than 16 bytes, or if offset < 8, we
// can still try 8-byte load stores, provided we can overrun up to 10 extra
// bytes. As above, the overrun will be fixed up by subsequent iterations
// of the outermost loop.
//
// The C++ snappy code calls this technique IncrementalCopyFastPath. Its
// commentary says:
//
// ----
//
// The main part of this loop is a simple copy of eight bytes at a time
// until we've copied (at least) the requested amount of bytes. However,
// if d and d-offset are less than eight bytes apart (indicating a
// repeating pattern of length < 8), we first need to expand the pattern in
// order to get the correct results. For instance, if the buffer looks like
// this, with the eight-byte <d-offset> and <d> patterns marked as
// intervals:
//
// abxxxxxxxxxxxx
// [------] d-offset
// [------] d
//
// a single eight-byte copy from <d-offset> to <d> will repeat the pattern
// once, after which we can move <d> two bytes without moving <d-offset>:
//
// ababxxxxxxxxxx
// [------] d-offset
// [------] d
//
// and repeat the exercise until the two no longer overlap.
//
// This allows us to do very well in the special case of one single byte
// repeated many times, without taking a big hit for more general cases.
//
// The worst case of extra writing past the end of the match occurs when
// offset == 1 and length == 1; the last copy will read from byte positions
// [0..7] and write to [4..11], whereas it was only supposed to write to
// position 1. Thus, ten excess bytes.
//
// ----
//
// That "10 byte overrun" worst case is confirmed by Go's
// TestSlowForwardCopyOverrun, which also tests the fixUpSlowForwardCopy
// and finishSlowForwardCopy algorithm.
//
// if length > len(dst)-d-10 {
// goto verySlowForwardCopy
// }
SUBQ $10, R14
CMPQ CX, R14
JGT verySlowForwardCopy
makeOffsetAtLeast8:
// !!! As above, expand the pattern so that offset >= 8 and we can use
// 8-byte load/stores.
//
// for offset < 8 {
// copy 8 bytes from dst[d-offset:] to dst[d:]
// length -= offset
// d += offset
// offset += offset
// // The two previous lines together means that d-offset, and therefore
// // R15, is unchanged.
// }
CMPQ DX, $8
JGE fixUpSlowForwardCopy
MOVQ (R15), BX
MOVQ BX, (DI)
SUBQ DX, CX
ADDQ DX, DI
ADDQ DX, DX
JMP makeOffsetAtLeast8
fixUpSlowForwardCopy:
// !!! Add length (which might be negative now) to d (implied by DI being
// &dst[d]) so that d ends up at the right place when we jump back to the
// top of the loop. Before we do that, though, we save DI to AX so that, if
// length is positive, copying the remaining length bytes will write to the
// right place.
MOVQ DI, AX
ADDQ CX, DI
finishSlowForwardCopy:
// !!! Repeat 8-byte load/stores until length <= 0. Ending with a negative
// length means that we overrun, but as above, that will be fixed up by
// subsequent iterations of the outermost loop.
CMPQ CX, $0
JLE loop
MOVQ (R15), BX
MOVQ BX, (AX)
ADDQ $8, R15
ADDQ $8, AX
SUBQ $8, CX
JMP finishSlowForwardCopy
verySlowForwardCopy:
// verySlowForwardCopy is a simple implementation of forward copy. In C
// parlance, this is a do/while loop instead of a while loop, since we know
// that length > 0. In Go syntax:
//
// for {
// dst[d] = dst[d - offset]
// d++
// length--
// if length == 0 {
// break
// }
// }
MOVB (R15), BX
MOVB BX, (DI)
INCQ R15
INCQ DI
DECQ CX
JNZ verySlowForwardCopy
JMP loop
// The code above handles copy tags.
// ----------------------------------------
end:
// This is the end of the "for s < len(src)".
//
// if d != len(dst) { etc }
CMPQ DI, R10
JNE errCorrupt
// return 0
MOVQ $0, ret+48(FP)
RET
errCorrupt:
// return decodeErrCodeCorrupt
MOVQ $1, ret+48(FP)
RET

101
vendor/github.com/golang/snappy/decode_other.go generated vendored Normal file
View File

@ -0,0 +1,101 @@
// Copyright 2016 The Snappy-Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build !amd64 appengine !gc noasm
package snappy
// decode writes the decoding of src to dst. It assumes that the varint-encoded
// length of the decompressed bytes has already been read, and that len(dst)
// equals that length.
//
// It returns 0 on success or a decodeErrCodeXxx error code on failure.
func decode(dst, src []byte) int {
var d, s, offset, length int
for s < len(src) {
switch src[s] & 0x03 {
case tagLiteral:
x := uint32(src[s] >> 2)
switch {
case x < 60:
s++
case x == 60:
s += 2
if uint(s) > uint(len(src)) { // The uint conversions catch overflow from the previous line.
return decodeErrCodeCorrupt
}
x = uint32(src[s-1])
case x == 61:
s += 3
if uint(s) > uint(len(src)) { // The uint conversions catch overflow from the previous line.
return decodeErrCodeCorrupt
}
x = uint32(src[s-2]) | uint32(src[s-1])<<8
case x == 62:
s += 4
if uint(s) > uint(len(src)) { // The uint conversions catch overflow from the previous line.
return decodeErrCodeCorrupt
}
x = uint32(src[s-3]) | uint32(src[s-2])<<8 | uint32(src[s-1])<<16
case x == 63:
s += 5
if uint(s) > uint(len(src)) { // The uint conversions catch overflow from the previous line.
return decodeErrCodeCorrupt
}
x = uint32(src[s-4]) | uint32(src[s-3])<<8 | uint32(src[s-2])<<16 | uint32(src[s-1])<<24
}
length = int(x) + 1
if length <= 0 {
return decodeErrCodeUnsupportedLiteralLength
}
if length > len(dst)-d || length > len(src)-s {
return decodeErrCodeCorrupt
}
copy(dst[d:], src[s:s+length])
d += length
s += length
continue
case tagCopy1:
s += 2
if uint(s) > uint(len(src)) { // The uint conversions catch overflow from the previous line.
return decodeErrCodeCorrupt
}
length = 4 + int(src[s-2])>>2&0x7
offset = int(uint32(src[s-2])&0xe0<<3 | uint32(src[s-1]))
case tagCopy2:
s += 3
if uint(s) > uint(len(src)) { // The uint conversions catch overflow from the previous line.
return decodeErrCodeCorrupt
}
length = 1 + int(src[s-3])>>2
offset = int(uint32(src[s-2]) | uint32(src[s-1])<<8)
case tagCopy4:
s += 5
if uint(s) > uint(len(src)) { // The uint conversions catch overflow from the previous line.
return decodeErrCodeCorrupt
}
length = 1 + int(src[s-5])>>2
offset = int(uint32(src[s-4]) | uint32(src[s-3])<<8 | uint32(src[s-2])<<16 | uint32(src[s-1])<<24)
}
if offset <= 0 || d < offset || length > len(dst)-d {
return decodeErrCodeCorrupt
}
// Copy from an earlier sub-slice of dst to a later sub-slice. Unlike
// the built-in copy function, this byte-by-byte copy always runs
// forwards, even if the slices overlap. Conceptually, this is:
//
// d += forwardCopy(dst[d:d+length], dst[d-offset:])
for end := d + length; d != end; d++ {
dst[d] = dst[d-offset]
}
}
if d != len(dst) {
return decodeErrCodeCorrupt
}
return 0
}

285
vendor/github.com/golang/snappy/encode.go generated vendored Normal file
View File

@ -0,0 +1,285 @@
// Copyright 2011 The Snappy-Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package snappy
import (
"encoding/binary"
"errors"
"io"
)
// Encode returns the encoded form of src. The returned slice may be a sub-
// slice of dst if dst was large enough to hold the entire encoded block.
// Otherwise, a newly allocated slice will be returned.
//
// The dst and src must not overlap. It is valid to pass a nil dst.
func Encode(dst, src []byte) []byte {
if n := MaxEncodedLen(len(src)); n < 0 {
panic(ErrTooLarge)
} else if len(dst) < n {
dst = make([]byte, n)
}
// The block starts with the varint-encoded length of the decompressed bytes.
d := binary.PutUvarint(dst, uint64(len(src)))
for len(src) > 0 {
p := src
src = nil
if len(p) > maxBlockSize {
p, src = p[:maxBlockSize], p[maxBlockSize:]
}
if len(p) < minNonLiteralBlockSize {
d += emitLiteral(dst[d:], p)
} else {
d += encodeBlock(dst[d:], p)
}
}
return dst[:d]
}
// inputMargin is the minimum number of extra input bytes to keep, inside
// encodeBlock's inner loop. On some architectures, this margin lets us
// implement a fast path for emitLiteral, where the copy of short (<= 16 byte)
// literals can be implemented as a single load to and store from a 16-byte
// register. That literal's actual length can be as short as 1 byte, so this
// can copy up to 15 bytes too much, but that's OK as subsequent iterations of
// the encoding loop will fix up the copy overrun, and this inputMargin ensures
// that we don't overrun the dst and src buffers.
const inputMargin = 16 - 1
// minNonLiteralBlockSize is the minimum size of the input to encodeBlock that
// could be encoded with a copy tag. This is the minimum with respect to the
// algorithm used by encodeBlock, not a minimum enforced by the file format.
//
// The encoded output must start with at least a 1 byte literal, as there are
// no previous bytes to copy. A minimal (1 byte) copy after that, generated
// from an emitCopy call in encodeBlock's main loop, would require at least
// another inputMargin bytes, for the reason above: we want any emitLiteral
// calls inside encodeBlock's main loop to use the fast path if possible, which
// requires being able to overrun by inputMargin bytes. Thus,
// minNonLiteralBlockSize equals 1 + 1 + inputMargin.
//
// The C++ code doesn't use this exact threshold, but it could, as discussed at
// https://groups.google.com/d/topic/snappy-compression/oGbhsdIJSJ8/discussion
// The difference between Go (2+inputMargin) and C++ (inputMargin) is purely an
// optimization. It should not affect the encoded form. This is tested by
// TestSameEncodingAsCppShortCopies.
const minNonLiteralBlockSize = 1 + 1 + inputMargin
// MaxEncodedLen returns the maximum length of a snappy block, given its
// uncompressed length.
//
// It will return a negative value if srcLen is too large to encode.
func MaxEncodedLen(srcLen int) int {
n := uint64(srcLen)
if n > 0xffffffff {
return -1
}
// Compressed data can be defined as:
// compressed := item* literal*
// item := literal* copy
//
// The trailing literal sequence has a space blowup of at most 62/60
// since a literal of length 60 needs one tag byte + one extra byte
// for length information.
//
// Item blowup is trickier to measure. Suppose the "copy" op copies
// 4 bytes of data. Because of a special check in the encoding code,
// we produce a 4-byte copy only if the offset is < 65536. Therefore
// the copy op takes 3 bytes to encode, and this type of item leads
// to at most the 62/60 blowup for representing literals.
//
// Suppose the "copy" op copies 5 bytes of data. If the offset is big
// enough, it will take 5 bytes to encode the copy op. Therefore the
// worst case here is a one-byte literal followed by a five-byte copy.
// That is, 6 bytes of input turn into 7 bytes of "compressed" data.
//
// This last factor dominates the blowup, so the final estimate is:
n = 32 + n + n/6
if n > 0xffffffff {
return -1
}
return int(n)
}
var errClosed = errors.New("snappy: Writer is closed")
// NewWriter returns a new Writer that compresses to w.
//
// The Writer returned does not buffer writes. There is no need to Flush or
// Close such a Writer.
//
// Deprecated: the Writer returned is not suitable for many small writes, only
// for few large writes. Use NewBufferedWriter instead, which is efficient
// regardless of the frequency and shape of the writes, and remember to Close
// that Writer when done.
func NewWriter(w io.Writer) *Writer {
return &Writer{
w: w,
obuf: make([]byte, obufLen),
}
}
// NewBufferedWriter returns a new Writer that compresses to w, using the
// framing format described at
// https://github.com/google/snappy/blob/master/framing_format.txt
//
// The Writer returned buffers writes. Users must call Close to guarantee all
// data has been forwarded to the underlying io.Writer. They may also call
// Flush zero or more times before calling Close.
func NewBufferedWriter(w io.Writer) *Writer {
return &Writer{
w: w,
ibuf: make([]byte, 0, maxBlockSize),
obuf: make([]byte, obufLen),
}
}
// Writer is an io.Writer that can write Snappy-compressed bytes.
type Writer struct {
w io.Writer
err error
// ibuf is a buffer for the incoming (uncompressed) bytes.
//
// Its use is optional. For backwards compatibility, Writers created by the
// NewWriter function have ibuf == nil, do not buffer incoming bytes, and
// therefore do not need to be Flush'ed or Close'd.
ibuf []byte
// obuf is a buffer for the outgoing (compressed) bytes.
obuf []byte
// wroteStreamHeader is whether we have written the stream header.
wroteStreamHeader bool
}
// Reset discards the writer's state and switches the Snappy writer to write to
// w. This permits reusing a Writer rather than allocating a new one.
func (w *Writer) Reset(writer io.Writer) {
w.w = writer
w.err = nil
if w.ibuf != nil {
w.ibuf = w.ibuf[:0]
}
w.wroteStreamHeader = false
}
// Write satisfies the io.Writer interface.
func (w *Writer) Write(p []byte) (nRet int, errRet error) {
if w.ibuf == nil {
// Do not buffer incoming bytes. This does not perform or compress well
// if the caller of Writer.Write writes many small slices. This
// behavior is therefore deprecated, but still supported for backwards
// compatibility with code that doesn't explicitly Flush or Close.
return w.write(p)
}
// The remainder of this method is based on bufio.Writer.Write from the
// standard library.
for len(p) > (cap(w.ibuf)-len(w.ibuf)) && w.err == nil {
var n int
if len(w.ibuf) == 0 {
// Large write, empty buffer.
// Write directly from p to avoid copy.
n, _ = w.write(p)
} else {
n = copy(w.ibuf[len(w.ibuf):cap(w.ibuf)], p)
w.ibuf = w.ibuf[:len(w.ibuf)+n]
w.Flush()
}
nRet += n
p = p[n:]
}
if w.err != nil {
return nRet, w.err
}
n := copy(w.ibuf[len(w.ibuf):cap(w.ibuf)], p)
w.ibuf = w.ibuf[:len(w.ibuf)+n]
nRet += n
return nRet, nil
}
func (w *Writer) write(p []byte) (nRet int, errRet error) {
if w.err != nil {
return 0, w.err
}
for len(p) > 0 {
obufStart := len(magicChunk)
if !w.wroteStreamHeader {
w.wroteStreamHeader = true
copy(w.obuf, magicChunk)
obufStart = 0
}
var uncompressed []byte
if len(p) > maxBlockSize {
uncompressed, p = p[:maxBlockSize], p[maxBlockSize:]
} else {
uncompressed, p = p, nil
}
checksum := crc(uncompressed)
// Compress the buffer, discarding the result if the improvement
// isn't at least 12.5%.
compressed := Encode(w.obuf[obufHeaderLen:], uncompressed)
chunkType := uint8(chunkTypeCompressedData)
chunkLen := 4 + len(compressed)
obufEnd := obufHeaderLen + len(compressed)
if len(compressed) >= len(uncompressed)-len(uncompressed)/8 {
chunkType = chunkTypeUncompressedData
chunkLen = 4 + len(uncompressed)
obufEnd = obufHeaderLen
}
// Fill in the per-chunk header that comes before the body.
w.obuf[len(magicChunk)+0] = chunkType
w.obuf[len(magicChunk)+1] = uint8(chunkLen >> 0)
w.obuf[len(magicChunk)+2] = uint8(chunkLen >> 8)
w.obuf[len(magicChunk)+3] = uint8(chunkLen >> 16)
w.obuf[len(magicChunk)+4] = uint8(checksum >> 0)
w.obuf[len(magicChunk)+5] = uint8(checksum >> 8)
w.obuf[len(magicChunk)+6] = uint8(checksum >> 16)
w.obuf[len(magicChunk)+7] = uint8(checksum >> 24)
if _, err := w.w.Write(w.obuf[obufStart:obufEnd]); err != nil {
w.err = err
return nRet, err
}
if chunkType == chunkTypeUncompressedData {
if _, err := w.w.Write(uncompressed); err != nil {
w.err = err
return nRet, err
}
}
nRet += len(uncompressed)
}
return nRet, nil
}
// Flush flushes the Writer to its underlying io.Writer.
func (w *Writer) Flush() error {
if w.err != nil {
return w.err
}
if len(w.ibuf) == 0 {
return nil
}
w.write(w.ibuf)
w.ibuf = w.ibuf[:0]
return w.err
}
// Close calls Flush and then closes the Writer.
func (w *Writer) Close() error {
w.Flush()
ret := w.err
if w.err == nil {
w.err = errClosed
}
return ret
}

29
vendor/github.com/golang/snappy/encode_amd64.go generated vendored Normal file
View File

@ -0,0 +1,29 @@
// Copyright 2016 The Snappy-Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build !appengine
// +build gc
// +build !noasm
package snappy
// emitLiteral has the same semantics as in encode_other.go.
//
//go:noescape
func emitLiteral(dst, lit []byte) int
// emitCopy has the same semantics as in encode_other.go.
//
//go:noescape
func emitCopy(dst []byte, offset, length int) int
// extendMatch has the same semantics as in encode_other.go.
//
//go:noescape
func extendMatch(src []byte, i, j int) int
// encodeBlock has the same semantics as in encode_other.go.
//
//go:noescape
func encodeBlock(dst, src []byte) (d int)

730
vendor/github.com/golang/snappy/encode_amd64.s generated vendored Normal file
View File

@ -0,0 +1,730 @@
// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build !appengine
// +build gc
// +build !noasm
#include "textflag.h"
// The XXX lines assemble on Go 1.4, 1.5 and 1.7, but not 1.6, due to a
// Go toolchain regression. See https://github.com/golang/go/issues/15426 and
// https://github.com/golang/snappy/issues/29
//
// As a workaround, the package was built with a known good assembler, and
// those instructions were disassembled by "objdump -d" to yield the
// 4e 0f b7 7c 5c 78 movzwq 0x78(%rsp,%r11,2),%r15
// style comments, in AT&T asm syntax. Note that rsp here is a physical
// register, not Go/asm's SP pseudo-register (see https://golang.org/doc/asm).
// The instructions were then encoded as "BYTE $0x.." sequences, which assemble
// fine on Go 1.6.
// The asm code generally follows the pure Go code in encode_other.go, except
// where marked with a "!!!".
// ----------------------------------------------------------------------------
// func emitLiteral(dst, lit []byte) int
//
// All local variables fit into registers. The register allocation:
// - AX len(lit)
// - BX n
// - DX return value
// - DI &dst[i]
// - R10 &lit[0]
//
// The 24 bytes of stack space is to call runtime·memmove.
//
// The unusual register allocation of local variables, such as R10 for the
// source pointer, matches the allocation used at the call site in encodeBlock,
// which makes it easier to manually inline this function.
TEXT ·emitLiteral(SB), NOSPLIT, $24-56
MOVQ dst_base+0(FP), DI
MOVQ lit_base+24(FP), R10
MOVQ lit_len+32(FP), AX
MOVQ AX, DX
MOVL AX, BX
SUBL $1, BX
CMPL BX, $60
JLT oneByte
CMPL BX, $256
JLT twoBytes
threeBytes:
MOVB $0xf4, 0(DI)
MOVW BX, 1(DI)
ADDQ $3, DI
ADDQ $3, DX
JMP memmove
twoBytes:
MOVB $0xf0, 0(DI)
MOVB BX, 1(DI)
ADDQ $2, DI
ADDQ $2, DX
JMP memmove
oneByte:
SHLB $2, BX
MOVB BX, 0(DI)
ADDQ $1, DI
ADDQ $1, DX
memmove:
MOVQ DX, ret+48(FP)
// copy(dst[i:], lit)
//
// This means calling runtime·memmove(&dst[i], &lit[0], len(lit)), so we push
// DI, R10 and AX as arguments.
MOVQ DI, 0(SP)
MOVQ R10, 8(SP)
MOVQ AX, 16(SP)
CALL runtime·memmove(SB)
RET
// ----------------------------------------------------------------------------
// func emitCopy(dst []byte, offset, length int) int
//
// All local variables fit into registers. The register allocation:
// - AX length
// - SI &dst[0]
// - DI &dst[i]
// - R11 offset
//
// The unusual register allocation of local variables, such as R11 for the
// offset, matches the allocation used at the call site in encodeBlock, which
// makes it easier to manually inline this function.
TEXT ·emitCopy(SB), NOSPLIT, $0-48
MOVQ dst_base+0(FP), DI
MOVQ DI, SI
MOVQ offset+24(FP), R11
MOVQ length+32(FP), AX
loop0:
// for length >= 68 { etc }
CMPL AX, $68
JLT step1
// Emit a length 64 copy, encoded as 3 bytes.
MOVB $0xfe, 0(DI)
MOVW R11, 1(DI)
ADDQ $3, DI
SUBL $64, AX
JMP loop0
step1:
// if length > 64 { etc }
CMPL AX, $64
JLE step2
// Emit a length 60 copy, encoded as 3 bytes.
MOVB $0xee, 0(DI)
MOVW R11, 1(DI)
ADDQ $3, DI
SUBL $60, AX
step2:
// if length >= 12 || offset >= 2048 { goto step3 }
CMPL AX, $12
JGE step3
CMPL R11, $2048
JGE step3
// Emit the remaining copy, encoded as 2 bytes.
MOVB R11, 1(DI)
SHRL $8, R11
SHLB $5, R11
SUBB $4, AX
SHLB $2, AX
ORB AX, R11
ORB $1, R11
MOVB R11, 0(DI)
ADDQ $2, DI
// Return the number of bytes written.
SUBQ SI, DI
MOVQ DI, ret+40(FP)
RET
step3:
// Emit the remaining copy, encoded as 3 bytes.
SUBL $1, AX
SHLB $2, AX
ORB $2, AX
MOVB AX, 0(DI)
MOVW R11, 1(DI)
ADDQ $3, DI
// Return the number of bytes written.
SUBQ SI, DI
MOVQ DI, ret+40(FP)
RET
// ----------------------------------------------------------------------------
// func extendMatch(src []byte, i, j int) int
//
// All local variables fit into registers. The register allocation:
// - DX &src[0]
// - SI &src[j]
// - R13 &src[len(src) - 8]
// - R14 &src[len(src)]
// - R15 &src[i]
//
// The unusual register allocation of local variables, such as R15 for a source
// pointer, matches the allocation used at the call site in encodeBlock, which
// makes it easier to manually inline this function.
TEXT ·extendMatch(SB), NOSPLIT, $0-48
MOVQ src_base+0(FP), DX
MOVQ src_len+8(FP), R14
MOVQ i+24(FP), R15
MOVQ j+32(FP), SI
ADDQ DX, R14
ADDQ DX, R15
ADDQ DX, SI
MOVQ R14, R13
SUBQ $8, R13
cmp8:
// As long as we are 8 or more bytes before the end of src, we can load and
// compare 8 bytes at a time. If those 8 bytes are equal, repeat.
CMPQ SI, R13
JA cmp1
MOVQ (R15), AX
MOVQ (SI), BX
CMPQ AX, BX
JNE bsf
ADDQ $8, R15
ADDQ $8, SI
JMP cmp8
bsf:
// If those 8 bytes were not equal, XOR the two 8 byte values, and return
// the index of the first byte that differs. The BSF instruction finds the
// least significant 1 bit, the amd64 architecture is little-endian, and
// the shift by 3 converts a bit index to a byte index.
XORQ AX, BX
BSFQ BX, BX
SHRQ $3, BX
ADDQ BX, SI
// Convert from &src[ret] to ret.
SUBQ DX, SI
MOVQ SI, ret+40(FP)
RET
cmp1:
// In src's tail, compare 1 byte at a time.
CMPQ SI, R14
JAE extendMatchEnd
MOVB (R15), AX
MOVB (SI), BX
CMPB AX, BX
JNE extendMatchEnd
ADDQ $1, R15
ADDQ $1, SI
JMP cmp1
extendMatchEnd:
// Convert from &src[ret] to ret.
SUBQ DX, SI
MOVQ SI, ret+40(FP)
RET
// ----------------------------------------------------------------------------
// func encodeBlock(dst, src []byte) (d int)
//
// All local variables fit into registers, other than "var table". The register
// allocation:
// - AX . .
// - BX . .
// - CX 56 shift (note that amd64 shifts by non-immediates must use CX).
// - DX 64 &src[0], tableSize
// - SI 72 &src[s]
// - DI 80 &dst[d]
// - R9 88 sLimit
// - R10 . &src[nextEmit]
// - R11 96 prevHash, currHash, nextHash, offset
// - R12 104 &src[base], skip
// - R13 . &src[nextS], &src[len(src) - 8]
// - R14 . len(src), bytesBetweenHashLookups, &src[len(src)], x
// - R15 112 candidate
//
// The second column (56, 64, etc) is the stack offset to spill the registers
// when calling other functions. We could pack this slightly tighter, but it's
// simpler to have a dedicated spill map independent of the function called.
//
// "var table [maxTableSize]uint16" takes up 32768 bytes of stack space. An
// extra 56 bytes, to call other functions, and an extra 64 bytes, to spill
// local variables (registers) during calls gives 32768 + 56 + 64 = 32888.
TEXT ·encodeBlock(SB), 0, $32888-56
MOVQ dst_base+0(FP), DI
MOVQ src_base+24(FP), SI
MOVQ src_len+32(FP), R14
// shift, tableSize := uint32(32-8), 1<<8
MOVQ $24, CX
MOVQ $256, DX
calcShift:
// for ; tableSize < maxTableSize && tableSize < len(src); tableSize *= 2 {
// shift--
// }
CMPQ DX, $16384
JGE varTable
CMPQ DX, R14
JGE varTable
SUBQ $1, CX
SHLQ $1, DX
JMP calcShift
varTable:
// var table [maxTableSize]uint16
//
// In the asm code, unlike the Go code, we can zero-initialize only the
// first tableSize elements. Each uint16 element is 2 bytes and each MOVOU
// writes 16 bytes, so we can do only tableSize/8 writes instead of the
// 2048 writes that would zero-initialize all of table's 32768 bytes.
SHRQ $3, DX
LEAQ table-32768(SP), BX
PXOR X0, X0
memclr:
MOVOU X0, 0(BX)
ADDQ $16, BX
SUBQ $1, DX
JNZ memclr
// !!! DX = &src[0]
MOVQ SI, DX
// sLimit := len(src) - inputMargin
MOVQ R14, R9
SUBQ $15, R9
// !!! Pre-emptively spill CX, DX and R9 to the stack. Their values don't
// change for the rest of the function.
MOVQ CX, 56(SP)
MOVQ DX, 64(SP)
MOVQ R9, 88(SP)
// nextEmit := 0
MOVQ DX, R10
// s := 1
ADDQ $1, SI
// nextHash := hash(load32(src, s), shift)
MOVL 0(SI), R11
IMULL $0x1e35a7bd, R11
SHRL CX, R11
outer:
// for { etc }
// skip := 32
MOVQ $32, R12
// nextS := s
MOVQ SI, R13
// candidate := 0
MOVQ $0, R15
inner0:
// for { etc }
// s := nextS
MOVQ R13, SI
// bytesBetweenHashLookups := skip >> 5
MOVQ R12, R14
SHRQ $5, R14
// nextS = s + bytesBetweenHashLookups
ADDQ R14, R13
// skip += bytesBetweenHashLookups
ADDQ R14, R12
// if nextS > sLimit { goto emitRemainder }
MOVQ R13, AX
SUBQ DX, AX
CMPQ AX, R9
JA emitRemainder
// candidate = int(table[nextHash])
// XXX: MOVWQZX table-32768(SP)(R11*2), R15
// XXX: 4e 0f b7 7c 5c 78 movzwq 0x78(%rsp,%r11,2),%r15
BYTE $0x4e
BYTE $0x0f
BYTE $0xb7
BYTE $0x7c
BYTE $0x5c
BYTE $0x78
// table[nextHash] = uint16(s)
MOVQ SI, AX
SUBQ DX, AX
// XXX: MOVW AX, table-32768(SP)(R11*2)
// XXX: 66 42 89 44 5c 78 mov %ax,0x78(%rsp,%r11,2)
BYTE $0x66
BYTE $0x42
BYTE $0x89
BYTE $0x44
BYTE $0x5c
BYTE $0x78
// nextHash = hash(load32(src, nextS), shift)
MOVL 0(R13), R11
IMULL $0x1e35a7bd, R11
SHRL CX, R11
// if load32(src, s) != load32(src, candidate) { continue } break
MOVL 0(SI), AX
MOVL (DX)(R15*1), BX
CMPL AX, BX
JNE inner0
fourByteMatch:
// As per the encode_other.go code:
//
// A 4-byte match has been found. We'll later see etc.
// !!! Jump to a fast path for short (<= 16 byte) literals. See the comment
// on inputMargin in encode.go.
MOVQ SI, AX
SUBQ R10, AX
CMPQ AX, $16
JLE emitLiteralFastPath
// ----------------------------------------
// Begin inline of the emitLiteral call.
//
// d += emitLiteral(dst[d:], src[nextEmit:s])
MOVL AX, BX
SUBL $1, BX
CMPL BX, $60
JLT inlineEmitLiteralOneByte
CMPL BX, $256
JLT inlineEmitLiteralTwoBytes
inlineEmitLiteralThreeBytes:
MOVB $0xf4, 0(DI)
MOVW BX, 1(DI)
ADDQ $3, DI
JMP inlineEmitLiteralMemmove
inlineEmitLiteralTwoBytes:
MOVB $0xf0, 0(DI)
MOVB BX, 1(DI)
ADDQ $2, DI
JMP inlineEmitLiteralMemmove
inlineEmitLiteralOneByte:
SHLB $2, BX
MOVB BX, 0(DI)
ADDQ $1, DI
inlineEmitLiteralMemmove:
// Spill local variables (registers) onto the stack; call; unspill.
//
// copy(dst[i:], lit)
//
// This means calling runtime·memmove(&dst[i], &lit[0], len(lit)), so we push
// DI, R10 and AX as arguments.
MOVQ DI, 0(SP)
MOVQ R10, 8(SP)
MOVQ AX, 16(SP)
ADDQ AX, DI // Finish the "d +=" part of "d += emitLiteral(etc)".
MOVQ SI, 72(SP)
MOVQ DI, 80(SP)
MOVQ R15, 112(SP)
CALL runtime·memmove(SB)
MOVQ 56(SP), CX
MOVQ 64(SP), DX
MOVQ 72(SP), SI
MOVQ 80(SP), DI
MOVQ 88(SP), R9
MOVQ 112(SP), R15
JMP inner1
inlineEmitLiteralEnd:
// End inline of the emitLiteral call.
// ----------------------------------------
emitLiteralFastPath:
// !!! Emit the 1-byte encoding "uint8(len(lit)-1)<<2".
MOVB AX, BX
SUBB $1, BX
SHLB $2, BX
MOVB BX, (DI)
ADDQ $1, DI
// !!! Implement the copy from lit to dst as a 16-byte load and store.
// (Encode's documentation says that dst and src must not overlap.)
//
// This always copies 16 bytes, instead of only len(lit) bytes, but that's
// OK. Subsequent iterations will fix up the overrun.
//
// Note that on amd64, it is legal and cheap to issue unaligned 8-byte or
// 16-byte loads and stores. This technique probably wouldn't be as
// effective on architectures that are fussier about alignment.
MOVOU 0(R10), X0
MOVOU X0, 0(DI)
ADDQ AX, DI
inner1:
// for { etc }
// base := s
MOVQ SI, R12
// !!! offset := base - candidate
MOVQ R12, R11
SUBQ R15, R11
SUBQ DX, R11
// ----------------------------------------
// Begin inline of the extendMatch call.
//
// s = extendMatch(src, candidate+4, s+4)
// !!! R14 = &src[len(src)]
MOVQ src_len+32(FP), R14
ADDQ DX, R14
// !!! R13 = &src[len(src) - 8]
MOVQ R14, R13
SUBQ $8, R13
// !!! R15 = &src[candidate + 4]
ADDQ $4, R15
ADDQ DX, R15
// !!! s += 4
ADDQ $4, SI
inlineExtendMatchCmp8:
// As long as we are 8 or more bytes before the end of src, we can load and
// compare 8 bytes at a time. If those 8 bytes are equal, repeat.
CMPQ SI, R13
JA inlineExtendMatchCmp1
MOVQ (R15), AX
MOVQ (SI), BX
CMPQ AX, BX
JNE inlineExtendMatchBSF
ADDQ $8, R15
ADDQ $8, SI
JMP inlineExtendMatchCmp8
inlineExtendMatchBSF:
// If those 8 bytes were not equal, XOR the two 8 byte values, and return
// the index of the first byte that differs. The BSF instruction finds the
// least significant 1 bit, the amd64 architecture is little-endian, and
// the shift by 3 converts a bit index to a byte index.
XORQ AX, BX
BSFQ BX, BX
SHRQ $3, BX
ADDQ BX, SI
JMP inlineExtendMatchEnd
inlineExtendMatchCmp1:
// In src's tail, compare 1 byte at a time.
CMPQ SI, R14
JAE inlineExtendMatchEnd
MOVB (R15), AX
MOVB (SI), BX
CMPB AX, BX
JNE inlineExtendMatchEnd
ADDQ $1, R15
ADDQ $1, SI
JMP inlineExtendMatchCmp1
inlineExtendMatchEnd:
// End inline of the extendMatch call.
// ----------------------------------------
// ----------------------------------------
// Begin inline of the emitCopy call.
//
// d += emitCopy(dst[d:], base-candidate, s-base)
// !!! length := s - base
MOVQ SI, AX
SUBQ R12, AX
inlineEmitCopyLoop0:
// for length >= 68 { etc }
CMPL AX, $68
JLT inlineEmitCopyStep1
// Emit a length 64 copy, encoded as 3 bytes.
MOVB $0xfe, 0(DI)
MOVW R11, 1(DI)
ADDQ $3, DI
SUBL $64, AX
JMP inlineEmitCopyLoop0
inlineEmitCopyStep1:
// if length > 64 { etc }
CMPL AX, $64
JLE inlineEmitCopyStep2
// Emit a length 60 copy, encoded as 3 bytes.
MOVB $0xee, 0(DI)
MOVW R11, 1(DI)
ADDQ $3, DI
SUBL $60, AX
inlineEmitCopyStep2:
// if length >= 12 || offset >= 2048 { goto inlineEmitCopyStep3 }
CMPL AX, $12
JGE inlineEmitCopyStep3
CMPL R11, $2048
JGE inlineEmitCopyStep3
// Emit the remaining copy, encoded as 2 bytes.
MOVB R11, 1(DI)
SHRL $8, R11
SHLB $5, R11
SUBB $4, AX
SHLB $2, AX
ORB AX, R11
ORB $1, R11
MOVB R11, 0(DI)
ADDQ $2, DI
JMP inlineEmitCopyEnd
inlineEmitCopyStep3:
// Emit the remaining copy, encoded as 3 bytes.
SUBL $1, AX
SHLB $2, AX
ORB $2, AX
MOVB AX, 0(DI)
MOVW R11, 1(DI)
ADDQ $3, DI
inlineEmitCopyEnd:
// End inline of the emitCopy call.
// ----------------------------------------
// nextEmit = s
MOVQ SI, R10
// if s >= sLimit { goto emitRemainder }
MOVQ SI, AX
SUBQ DX, AX
CMPQ AX, R9
JAE emitRemainder
// As per the encode_other.go code:
//
// We could immediately etc.
// x := load64(src, s-1)
MOVQ -1(SI), R14
// prevHash := hash(uint32(x>>0), shift)
MOVL R14, R11
IMULL $0x1e35a7bd, R11
SHRL CX, R11
// table[prevHash] = uint16(s-1)
MOVQ SI, AX
SUBQ DX, AX
SUBQ $1, AX
// XXX: MOVW AX, table-32768(SP)(R11*2)
// XXX: 66 42 89 44 5c 78 mov %ax,0x78(%rsp,%r11,2)
BYTE $0x66
BYTE $0x42
BYTE $0x89
BYTE $0x44
BYTE $0x5c
BYTE $0x78
// currHash := hash(uint32(x>>8), shift)
SHRQ $8, R14
MOVL R14, R11
IMULL $0x1e35a7bd, R11
SHRL CX, R11
// candidate = int(table[currHash])
// XXX: MOVWQZX table-32768(SP)(R11*2), R15
// XXX: 4e 0f b7 7c 5c 78 movzwq 0x78(%rsp,%r11,2),%r15
BYTE $0x4e
BYTE $0x0f
BYTE $0xb7
BYTE $0x7c
BYTE $0x5c
BYTE $0x78
// table[currHash] = uint16(s)
ADDQ $1, AX
// XXX: MOVW AX, table-32768(SP)(R11*2)
// XXX: 66 42 89 44 5c 78 mov %ax,0x78(%rsp,%r11,2)
BYTE $0x66
BYTE $0x42
BYTE $0x89
BYTE $0x44
BYTE $0x5c
BYTE $0x78
// if uint32(x>>8) == load32(src, candidate) { continue }
MOVL (DX)(R15*1), BX
CMPL R14, BX
JEQ inner1
// nextHash = hash(uint32(x>>16), shift)
SHRQ $8, R14
MOVL R14, R11
IMULL $0x1e35a7bd, R11
SHRL CX, R11
// s++
ADDQ $1, SI
// break out of the inner1 for loop, i.e. continue the outer loop.
JMP outer
emitRemainder:
// if nextEmit < len(src) { etc }
MOVQ src_len+32(FP), AX
ADDQ DX, AX
CMPQ R10, AX
JEQ encodeBlockEnd
// d += emitLiteral(dst[d:], src[nextEmit:])
//
// Push args.
MOVQ DI, 0(SP)
MOVQ $0, 8(SP) // Unnecessary, as the callee ignores it, but conservative.
MOVQ $0, 16(SP) // Unnecessary, as the callee ignores it, but conservative.
MOVQ R10, 24(SP)
SUBQ R10, AX
MOVQ AX, 32(SP)
MOVQ AX, 40(SP) // Unnecessary, as the callee ignores it, but conservative.
// Spill local variables (registers) onto the stack; call; unspill.
MOVQ DI, 80(SP)
CALL ·emitLiteral(SB)
MOVQ 80(SP), DI
// Finish the "d +=" part of "d += emitLiteral(etc)".
ADDQ 48(SP), DI
encodeBlockEnd:
MOVQ dst_base+0(FP), AX
SUBQ AX, DI
MOVQ DI, d+48(FP)
RET

238
vendor/github.com/golang/snappy/encode_other.go generated vendored Normal file
View File

@ -0,0 +1,238 @@
// Copyright 2016 The Snappy-Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build !amd64 appengine !gc noasm
package snappy
func load32(b []byte, i int) uint32 {
b = b[i : i+4 : len(b)] // Help the compiler eliminate bounds checks on the next line.
return uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24
}
func load64(b []byte, i int) uint64 {
b = b[i : i+8 : len(b)] // Help the compiler eliminate bounds checks on the next line.
return uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 |
uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56
}
// emitLiteral writes a literal chunk and returns the number of bytes written.
//
// It assumes that:
// dst is long enough to hold the encoded bytes
// 1 <= len(lit) && len(lit) <= 65536
func emitLiteral(dst, lit []byte) int {
i, n := 0, uint(len(lit)-1)
switch {
case n < 60:
dst[0] = uint8(n)<<2 | tagLiteral
i = 1
case n < 1<<8:
dst[0] = 60<<2 | tagLiteral
dst[1] = uint8(n)
i = 2
default:
dst[0] = 61<<2 | tagLiteral
dst[1] = uint8(n)
dst[2] = uint8(n >> 8)
i = 3
}
return i + copy(dst[i:], lit)
}
// emitCopy writes a copy chunk and returns the number of bytes written.
//
// It assumes that:
// dst is long enough to hold the encoded bytes
// 1 <= offset && offset <= 65535
// 4 <= length && length <= 65535
func emitCopy(dst []byte, offset, length int) int {
i := 0
// The maximum length for a single tagCopy1 or tagCopy2 op is 64 bytes. The
// threshold for this loop is a little higher (at 68 = 64 + 4), and the
// length emitted down below is is a little lower (at 60 = 64 - 4), because
// it's shorter to encode a length 67 copy as a length 60 tagCopy2 followed
// by a length 7 tagCopy1 (which encodes as 3+2 bytes) than to encode it as
// a length 64 tagCopy2 followed by a length 3 tagCopy2 (which encodes as
// 3+3 bytes). The magic 4 in the 64±4 is because the minimum length for a
// tagCopy1 op is 4 bytes, which is why a length 3 copy has to be an
// encodes-as-3-bytes tagCopy2 instead of an encodes-as-2-bytes tagCopy1.
for length >= 68 {
// Emit a length 64 copy, encoded as 3 bytes.
dst[i+0] = 63<<2 | tagCopy2
dst[i+1] = uint8(offset)
dst[i+2] = uint8(offset >> 8)
i += 3
length -= 64
}
if length > 64 {
// Emit a length 60 copy, encoded as 3 bytes.
dst[i+0] = 59<<2 | tagCopy2
dst[i+1] = uint8(offset)
dst[i+2] = uint8(offset >> 8)
i += 3
length -= 60
}
if length >= 12 || offset >= 2048 {
// Emit the remaining copy, encoded as 3 bytes.
dst[i+0] = uint8(length-1)<<2 | tagCopy2
dst[i+1] = uint8(offset)
dst[i+2] = uint8(offset >> 8)
return i + 3
}
// Emit the remaining copy, encoded as 2 bytes.
dst[i+0] = uint8(offset>>8)<<5 | uint8(length-4)<<2 | tagCopy1
dst[i+1] = uint8(offset)
return i + 2
}
// extendMatch returns the largest k such that k <= len(src) and that
// src[i:i+k-j] and src[j:k] have the same contents.
//
// It assumes that:
// 0 <= i && i < j && j <= len(src)
func extendMatch(src []byte, i, j int) int {
for ; j < len(src) && src[i] == src[j]; i, j = i+1, j+1 {
}
return j
}
func hash(u, shift uint32) uint32 {
return (u * 0x1e35a7bd) >> shift
}
// encodeBlock encodes a non-empty src to a guaranteed-large-enough dst. It
// assumes that the varint-encoded length of the decompressed bytes has already
// been written.
//
// It also assumes that:
// len(dst) >= MaxEncodedLen(len(src)) &&
// minNonLiteralBlockSize <= len(src) && len(src) <= maxBlockSize
func encodeBlock(dst, src []byte) (d int) {
// Initialize the hash table. Its size ranges from 1<<8 to 1<<14 inclusive.
// The table element type is uint16, as s < sLimit and sLimit < len(src)
// and len(src) <= maxBlockSize and maxBlockSize == 65536.
const (
maxTableSize = 1 << 14
// tableMask is redundant, but helps the compiler eliminate bounds
// checks.
tableMask = maxTableSize - 1
)
shift := uint32(32 - 8)
for tableSize := 1 << 8; tableSize < maxTableSize && tableSize < len(src); tableSize *= 2 {
shift--
}
// In Go, all array elements are zero-initialized, so there is no advantage
// to a smaller tableSize per se. However, it matches the C++ algorithm,
// and in the asm versions of this code, we can get away with zeroing only
// the first tableSize elements.
var table [maxTableSize]uint16
// sLimit is when to stop looking for offset/length copies. The inputMargin
// lets us use a fast path for emitLiteral in the main loop, while we are
// looking for copies.
sLimit := len(src) - inputMargin
// nextEmit is where in src the next emitLiteral should start from.
nextEmit := 0
// The encoded form must start with a literal, as there are no previous
// bytes to copy, so we start looking for hash matches at s == 1.
s := 1
nextHash := hash(load32(src, s), shift)
for {
// Copied from the C++ snappy implementation:
//
// Heuristic match skipping: If 32 bytes are scanned with no matches
// found, start looking only at every other byte. If 32 more bytes are
// scanned (or skipped), look at every third byte, etc.. When a match
// is found, immediately go back to looking at every byte. This is a
// small loss (~5% performance, ~0.1% density) for compressible data
// due to more bookkeeping, but for non-compressible data (such as
// JPEG) it's a huge win since the compressor quickly "realizes" the
// data is incompressible and doesn't bother looking for matches
// everywhere.
//
// The "skip" variable keeps track of how many bytes there are since
// the last match; dividing it by 32 (ie. right-shifting by five) gives
// the number of bytes to move ahead for each iteration.
skip := 32
nextS := s
candidate := 0
for {
s = nextS
bytesBetweenHashLookups := skip >> 5
nextS = s + bytesBetweenHashLookups
skip += bytesBetweenHashLookups
if nextS > sLimit {
goto emitRemainder
}
candidate = int(table[nextHash&tableMask])
table[nextHash&tableMask] = uint16(s)
nextHash = hash(load32(src, nextS), shift)
if load32(src, s) == load32(src, candidate) {
break
}
}
// A 4-byte match has been found. We'll later see if more than 4 bytes
// match. But, prior to the match, src[nextEmit:s] are unmatched. Emit
// them as literal bytes.
d += emitLiteral(dst[d:], src[nextEmit:s])
// Call emitCopy, and then see if another emitCopy could be our next
// move. Repeat until we find no match for the input immediately after
// what was consumed by the last emitCopy call.
//
// If we exit this loop normally then we need to call emitLiteral next,
// though we don't yet know how big the literal will be. We handle that
// by proceeding to the next iteration of the main loop. We also can
// exit this loop via goto if we get close to exhausting the input.
for {
// Invariant: we have a 4-byte match at s, and no need to emit any
// literal bytes prior to s.
base := s
// Extend the 4-byte match as long as possible.
//
// This is an inlined version of:
// s = extendMatch(src, candidate+4, s+4)
s += 4
for i := candidate + 4; s < len(src) && src[i] == src[s]; i, s = i+1, s+1 {
}
d += emitCopy(dst[d:], base-candidate, s-base)
nextEmit = s
if s >= sLimit {
goto emitRemainder
}
// We could immediately start working at s now, but to improve
// compression we first update the hash table at s-1 and at s. If
// another emitCopy is not our next move, also calculate nextHash
// at s+1. At least on GOARCH=amd64, these three hash calculations
// are faster as one load64 call (with some shifts) instead of
// three load32 calls.
x := load64(src, s-1)
prevHash := hash(uint32(x>>0), shift)
table[prevHash&tableMask] = uint16(s - 1)
currHash := hash(uint32(x>>8), shift)
candidate = int(table[currHash&tableMask])
table[currHash&tableMask] = uint16(s)
if uint32(x>>8) != load32(src, candidate) {
nextHash = hash(uint32(x>>16), shift)
s++
break
}
}
}
emitRemainder:
if nextEmit < len(src) {
d += emitLiteral(dst[d:], src[nextEmit:])
}
return d
}

1
vendor/github.com/golang/snappy/go.mod generated vendored Normal file
View File

@ -0,0 +1 @@
module github.com/golang/snappy

98
vendor/github.com/golang/snappy/snappy.go generated vendored Normal file
View File

@ -0,0 +1,98 @@
// Copyright 2011 The Snappy-Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package snappy implements the Snappy compression format. It aims for very
// high speeds and reasonable compression.
//
// There are actually two Snappy formats: block and stream. They are related,
// but different: trying to decompress block-compressed data as a Snappy stream
// will fail, and vice versa. The block format is the Decode and Encode
// functions and the stream format is the Reader and Writer types.
//
// The block format, the more common case, is used when the complete size (the
// number of bytes) of the original data is known upfront, at the time
// compression starts. The stream format, also known as the framing format, is
// for when that isn't always true.
//
// The canonical, C++ implementation is at https://github.com/google/snappy and
// it only implements the block format.
package snappy // import "github.com/golang/snappy"
import (
"hash/crc32"
)
/*
Each encoded block begins with the varint-encoded length of the decoded data,
followed by a sequence of chunks. Chunks begin and end on byte boundaries. The
first byte of each chunk is broken into its 2 least and 6 most significant bits
called l and m: l ranges in [0, 4) and m ranges in [0, 64). l is the chunk tag.
Zero means a literal tag. All other values mean a copy tag.
For literal tags:
- If m < 60, the next 1 + m bytes are literal bytes.
- Otherwise, let n be the little-endian unsigned integer denoted by the next
m - 59 bytes. The next 1 + n bytes after that are literal bytes.
For copy tags, length bytes are copied from offset bytes ago, in the style of
Lempel-Ziv compression algorithms. In particular:
- For l == 1, the offset ranges in [0, 1<<11) and the length in [4, 12).
The length is 4 + the low 3 bits of m. The high 3 bits of m form bits 8-10
of the offset. The next byte is bits 0-7 of the offset.
- For l == 2, the offset ranges in [0, 1<<16) and the length in [1, 65).
The length is 1 + m. The offset is the little-endian unsigned integer
denoted by the next 2 bytes.
- For l == 3, this tag is a legacy format that is no longer issued by most
encoders. Nonetheless, the offset ranges in [0, 1<<32) and the length in
[1, 65). The length is 1 + m. The offset is the little-endian unsigned
integer denoted by the next 4 bytes.
*/
const (
tagLiteral = 0x00
tagCopy1 = 0x01
tagCopy2 = 0x02
tagCopy4 = 0x03
)
const (
checksumSize = 4
chunkHeaderSize = 4
magicChunk = "\xff\x06\x00\x00" + magicBody
magicBody = "sNaPpY"
// maxBlockSize is the maximum size of the input to encodeBlock. It is not
// part of the wire format per se, but some parts of the encoder assume
// that an offset fits into a uint16.
//
// Also, for the framing format (Writer type instead of Encode function),
// https://github.com/google/snappy/blob/master/framing_format.txt says
// that "the uncompressed data in a chunk must be no longer than 65536
// bytes".
maxBlockSize = 65536
// maxEncodedLenOfMaxBlockSize equals MaxEncodedLen(maxBlockSize), but is
// hard coded to be a const instead of a variable, so that obufLen can also
// be a const. Their equivalence is confirmed by
// TestMaxEncodedLenOfMaxBlockSize.
maxEncodedLenOfMaxBlockSize = 76490
obufHeaderLen = len(magicChunk) + checksumSize + chunkHeaderSize
obufLen = obufHeaderLen + maxEncodedLenOfMaxBlockSize
)
const (
chunkTypeCompressedData = 0x00
chunkTypeUncompressedData = 0x01
chunkTypePadding = 0xfe
chunkTypeStreamIdentifier = 0xff
)
var crcTable = crc32.MakeTable(crc32.Castagnoli)
// crc implements the checksum specified in section 3 of
// https://github.com/google/snappy/blob/master/framing_format.txt
func crc(b []byte) uint32 {
c := crc32.Update(0, crcTable, b)
return uint32(c>>15|c<<17) + 0xa282ead8
}

2
vendor/github.com/hashicorp/hcl/go.mod generated vendored
View File

@ -1,5 +1,3 @@
module github.com/hashicorp/hcl
require github.com/davecgh/go-spew v1.1.1
go 1.13

2
vendor/github.com/spf13/afero/go.mod generated vendored
View File

@ -1,5 +1,3 @@
module github.com/spf13/afero
require golang.org/x/text v0.3.0
go 1.13

24
vendor/github.com/syndtr/goleveldb/LICENSE generated vendored Normal file
View File

@ -0,0 +1,24 @@
Copyright 2012 Suryandaru Triandana <syndtr@gmail.com>
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

349
vendor/github.com/syndtr/goleveldb/leveldb/batch.go generated vendored Normal file
View File

@ -0,0 +1,349 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package leveldb
import (
"encoding/binary"
"fmt"
"io"
"github.com/syndtr/goleveldb/leveldb/errors"
"github.com/syndtr/goleveldb/leveldb/memdb"
"github.com/syndtr/goleveldb/leveldb/storage"
)
// ErrBatchCorrupted records reason of batch corruption. This error will be
// wrapped with errors.ErrCorrupted.
type ErrBatchCorrupted struct {
Reason string
}
func (e *ErrBatchCorrupted) Error() string {
return fmt.Sprintf("leveldb: batch corrupted: %s", e.Reason)
}
func newErrBatchCorrupted(reason string) error {
return errors.NewErrCorrupted(storage.FileDesc{}, &ErrBatchCorrupted{reason})
}
const (
batchHeaderLen = 8 + 4
batchGrowRec = 3000
batchBufioSize = 16
)
// BatchReplay wraps basic batch operations.
type BatchReplay interface {
Put(key, value []byte)
Delete(key []byte)
}
type batchIndex struct {
keyType keyType
keyPos, keyLen int
valuePos, valueLen int
}
func (index batchIndex) k(data []byte) []byte {
return data[index.keyPos : index.keyPos+index.keyLen]
}
func (index batchIndex) v(data []byte) []byte {
if index.valueLen != 0 {
return data[index.valuePos : index.valuePos+index.valueLen]
}
return nil
}
func (index batchIndex) kv(data []byte) (key, value []byte) {
return index.k(data), index.v(data)
}
// Batch is a write batch.
type Batch struct {
data []byte
index []batchIndex
// internalLen is sums of key/value pair length plus 8-bytes internal key.
internalLen int
}
func (b *Batch) grow(n int) {
o := len(b.data)
if cap(b.data)-o < n {
div := 1
if len(b.index) > batchGrowRec {
div = len(b.index) / batchGrowRec
}
ndata := make([]byte, o, o+n+o/div)
copy(ndata, b.data)
b.data = ndata
}
}
func (b *Batch) appendRec(kt keyType, key, value []byte) {
n := 1 + binary.MaxVarintLen32 + len(key)
if kt == keyTypeVal {
n += binary.MaxVarintLen32 + len(value)
}
b.grow(n)
index := batchIndex{keyType: kt}
o := len(b.data)
data := b.data[:o+n]
data[o] = byte(kt)
o++
o += binary.PutUvarint(data[o:], uint64(len(key)))
index.keyPos = o
index.keyLen = len(key)
o += copy(data[o:], key)
if kt == keyTypeVal {
o += binary.PutUvarint(data[o:], uint64(len(value)))
index.valuePos = o
index.valueLen = len(value)
o += copy(data[o:], value)
}
b.data = data[:o]
b.index = append(b.index, index)
b.internalLen += index.keyLen + index.valueLen + 8
}
// Put appends 'put operation' of the given key/value pair to the batch.
// It is safe to modify the contents of the argument after Put returns but not
// before.
func (b *Batch) Put(key, value []byte) {
b.appendRec(keyTypeVal, key, value)
}
// Delete appends 'delete operation' of the given key to the batch.
// It is safe to modify the contents of the argument after Delete returns but
// not before.
func (b *Batch) Delete(key []byte) {
b.appendRec(keyTypeDel, key, nil)
}
// Dump dumps batch contents. The returned slice can be loaded into the
// batch using Load method.
// The returned slice is not its own copy, so the contents should not be
// modified.
func (b *Batch) Dump() []byte {
return b.data
}
// Load loads given slice into the batch. Previous contents of the batch
// will be discarded.
// The given slice will not be copied and will be used as batch buffer, so
// it is not safe to modify the contents of the slice.
func (b *Batch) Load(data []byte) error {
return b.decode(data, -1)
}
// Replay replays batch contents.
func (b *Batch) Replay(r BatchReplay) error {
for _, index := range b.index {
switch index.keyType {
case keyTypeVal:
r.Put(index.k(b.data), index.v(b.data))
case keyTypeDel:
r.Delete(index.k(b.data))
}
}
return nil
}
// Len returns number of records in the batch.
func (b *Batch) Len() int {
return len(b.index)
}
// Reset resets the batch.
func (b *Batch) Reset() {
b.data = b.data[:0]
b.index = b.index[:0]
b.internalLen = 0
}
func (b *Batch) replayInternal(fn func(i int, kt keyType, k, v []byte) error) error {
for i, index := range b.index {
if err := fn(i, index.keyType, index.k(b.data), index.v(b.data)); err != nil {
return err
}
}
return nil
}
func (b *Batch) append(p *Batch) {
ob := len(b.data)
oi := len(b.index)
b.data = append(b.data, p.data...)
b.index = append(b.index, p.index...)
b.internalLen += p.internalLen
// Updating index offset.
if ob != 0 {
for ; oi < len(b.index); oi++ {
index := &b.index[oi]
index.keyPos += ob
if index.valueLen != 0 {
index.valuePos += ob
}
}
}
}
func (b *Batch) decode(data []byte, expectedLen int) error {
b.data = data
b.index = b.index[:0]
b.internalLen = 0
err := decodeBatch(data, func(i int, index batchIndex) error {
b.index = append(b.index, index)
b.internalLen += index.keyLen + index.valueLen + 8
return nil
})
if err != nil {
return err
}
if expectedLen >= 0 && len(b.index) != expectedLen {
return newErrBatchCorrupted(fmt.Sprintf("invalid records length: %d vs %d", expectedLen, len(b.index)))
}
return nil
}
func (b *Batch) putMem(seq uint64, mdb *memdb.DB) error {
var ik []byte
for i, index := range b.index {
ik = makeInternalKey(ik, index.k(b.data), seq+uint64(i), index.keyType)
if err := mdb.Put(ik, index.v(b.data)); err != nil {
return err
}
}
return nil
}
func (b *Batch) revertMem(seq uint64, mdb *memdb.DB) error {
var ik []byte
for i, index := range b.index {
ik = makeInternalKey(ik, index.k(b.data), seq+uint64(i), index.keyType)
if err := mdb.Delete(ik); err != nil {
return err
}
}
return nil
}
func newBatch() interface{} {
return &Batch{}
}
func decodeBatch(data []byte, fn func(i int, index batchIndex) error) error {
var index batchIndex
for i, o := 0, 0; o < len(data); i++ {
// Key type.
index.keyType = keyType(data[o])
if index.keyType > keyTypeVal {
return newErrBatchCorrupted(fmt.Sprintf("bad record: invalid type %#x", uint(index.keyType)))
}
o++
// Key.
x, n := binary.Uvarint(data[o:])
o += n
if n <= 0 || o+int(x) > len(data) {
return newErrBatchCorrupted("bad record: invalid key length")
}
index.keyPos = o
index.keyLen = int(x)
o += index.keyLen
// Value.
if index.keyType == keyTypeVal {
x, n = binary.Uvarint(data[o:])
o += n
if n <= 0 || o+int(x) > len(data) {
return newErrBatchCorrupted("bad record: invalid value length")
}
index.valuePos = o
index.valueLen = int(x)
o += index.valueLen
} else {
index.valuePos = 0
index.valueLen = 0
}
if err := fn(i, index); err != nil {
return err
}
}
return nil
}
func decodeBatchToMem(data []byte, expectSeq uint64, mdb *memdb.DB) (seq uint64, batchLen int, err error) {
seq, batchLen, err = decodeBatchHeader(data)
if err != nil {
return 0, 0, err
}
if seq < expectSeq {
return 0, 0, newErrBatchCorrupted("invalid sequence number")
}
data = data[batchHeaderLen:]
var ik []byte
var decodedLen int
err = decodeBatch(data, func(i int, index batchIndex) error {
if i >= batchLen {
return newErrBatchCorrupted("invalid records length")
}
ik = makeInternalKey(ik, index.k(data), seq+uint64(i), index.keyType)
if err := mdb.Put(ik, index.v(data)); err != nil {
return err
}
decodedLen++
return nil
})
if err == nil && decodedLen != batchLen {
err = newErrBatchCorrupted(fmt.Sprintf("invalid records length: %d vs %d", batchLen, decodedLen))
}
return
}
func encodeBatchHeader(dst []byte, seq uint64, batchLen int) []byte {
dst = ensureBuffer(dst, batchHeaderLen)
binary.LittleEndian.PutUint64(dst, seq)
binary.LittleEndian.PutUint32(dst[8:], uint32(batchLen))
return dst
}
func decodeBatchHeader(data []byte) (seq uint64, batchLen int, err error) {
if len(data) < batchHeaderLen {
return 0, 0, newErrBatchCorrupted("too short")
}
seq = binary.LittleEndian.Uint64(data)
batchLen = int(binary.LittleEndian.Uint32(data[8:]))
if batchLen < 0 {
return 0, 0, newErrBatchCorrupted("invalid records length")
}
return
}
func batchesLen(batches []*Batch) int {
batchLen := 0
for _, batch := range batches {
batchLen += batch.Len()
}
return batchLen
}
func writeBatchesWithHeader(wr io.Writer, batches []*Batch, seq uint64) error {
if _, err := wr.Write(encodeBatchHeader(nil, seq, batchesLen(batches))); err != nil {
return err
}
for _, batch := range batches {
if _, err := wr.Write(batch.data); err != nil {
return err
}
}
return nil
}

704
vendor/github.com/syndtr/goleveldb/leveldb/cache/cache.go generated vendored Normal file
View File

@ -0,0 +1,704 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Package cache provides interface and implementation of a cache algorithms.
package cache
import (
"sync"
"sync/atomic"
"unsafe"
"github.com/syndtr/goleveldb/leveldb/util"
)
// Cacher provides interface to implements a caching functionality.
// An implementation must be safe for concurrent use.
type Cacher interface {
// Capacity returns cache capacity.
Capacity() int
// SetCapacity sets cache capacity.
SetCapacity(capacity int)
// Promote promotes the 'cache node'.
Promote(n *Node)
// Ban evicts the 'cache node' and prevent subsequent 'promote'.
Ban(n *Node)
// Evict evicts the 'cache node'.
Evict(n *Node)
// EvictNS evicts 'cache node' with the given namespace.
EvictNS(ns uint64)
// EvictAll evicts all 'cache node'.
EvictAll()
// Close closes the 'cache tree'
Close() error
}
// Value is a 'cacheable object'. It may implements util.Releaser, if
// so the the Release method will be called once object is released.
type Value interface{}
// NamespaceGetter provides convenient wrapper for namespace.
type NamespaceGetter struct {
Cache *Cache
NS uint64
}
// Get simply calls Cache.Get() method.
func (g *NamespaceGetter) Get(key uint64, setFunc func() (size int, value Value)) *Handle {
return g.Cache.Get(g.NS, key, setFunc)
}
// The hash tables implementation is based on:
// "Dynamic-Sized Nonblocking Hash Tables", by Yujie Liu,
// Kunlong Zhang, and Michael Spear.
// ACM Symposium on Principles of Distributed Computing, Jul 2014.
const (
mInitialSize = 1 << 4
mOverflowThreshold = 1 << 5
mOverflowGrowThreshold = 1 << 7
)
type mBucket struct {
mu sync.Mutex
node []*Node
frozen bool
}
func (b *mBucket) freeze() []*Node {
b.mu.Lock()
defer b.mu.Unlock()
if !b.frozen {
b.frozen = true
}
return b.node
}
func (b *mBucket) get(r *Cache, h *mNode, hash uint32, ns, key uint64, noset bool) (done, added bool, n *Node) {
b.mu.Lock()
if b.frozen {
b.mu.Unlock()
return
}
// Scan the node.
for _, n := range b.node {
if n.hash == hash && n.ns == ns && n.key == key {
atomic.AddInt32(&n.ref, 1)
b.mu.Unlock()
return true, false, n
}
}
// Get only.
if noset {
b.mu.Unlock()
return true, false, nil
}
// Create node.
n = &Node{
r: r,
hash: hash,
ns: ns,
key: key,
ref: 1,
}
// Add node to bucket.
b.node = append(b.node, n)
bLen := len(b.node)
b.mu.Unlock()
// Update counter.
grow := atomic.AddInt32(&r.nodes, 1) >= h.growThreshold
if bLen > mOverflowThreshold {
grow = grow || atomic.AddInt32(&h.overflow, 1) >= mOverflowGrowThreshold
}
// Grow.
if grow && atomic.CompareAndSwapInt32(&h.resizeInProgess, 0, 1) {
nhLen := len(h.buckets) << 1
nh := &mNode{
buckets: make([]unsafe.Pointer, nhLen),
mask: uint32(nhLen) - 1,
pred: unsafe.Pointer(h),
growThreshold: int32(nhLen * mOverflowThreshold),
shrinkThreshold: int32(nhLen >> 1),
}
ok := atomic.CompareAndSwapPointer(&r.mHead, unsafe.Pointer(h), unsafe.Pointer(nh))
if !ok {
panic("BUG: failed swapping head")
}
go nh.initBuckets()
}
return true, true, n
}
func (b *mBucket) delete(r *Cache, h *mNode, hash uint32, ns, key uint64) (done, deleted bool) {
b.mu.Lock()
if b.frozen {
b.mu.Unlock()
return
}
// Scan the node.
var (
n *Node
bLen int
)
for i := range b.node {
n = b.node[i]
if n.ns == ns && n.key == key {
if atomic.LoadInt32(&n.ref) == 0 {
deleted = true
// Call releaser.
if n.value != nil {
if r, ok := n.value.(util.Releaser); ok {
r.Release()
}
n.value = nil
}
// Remove node from bucket.
b.node = append(b.node[:i], b.node[i+1:]...)
bLen = len(b.node)
}
break
}
}
b.mu.Unlock()
if deleted {
// Call OnDel.
for _, f := range n.onDel {
f()
}
// Update counter.
atomic.AddInt32(&r.size, int32(n.size)*-1)
shrink := atomic.AddInt32(&r.nodes, -1) < h.shrinkThreshold
if bLen >= mOverflowThreshold {
atomic.AddInt32(&h.overflow, -1)
}
// Shrink.
if shrink && len(h.buckets) > mInitialSize && atomic.CompareAndSwapInt32(&h.resizeInProgess, 0, 1) {
nhLen := len(h.buckets) >> 1
nh := &mNode{
buckets: make([]unsafe.Pointer, nhLen),
mask: uint32(nhLen) - 1,
pred: unsafe.Pointer(h),
growThreshold: int32(nhLen * mOverflowThreshold),
shrinkThreshold: int32(nhLen >> 1),
}
ok := atomic.CompareAndSwapPointer(&r.mHead, unsafe.Pointer(h), unsafe.Pointer(nh))
if !ok {
panic("BUG: failed swapping head")
}
go nh.initBuckets()
}
}
return true, deleted
}
type mNode struct {
buckets []unsafe.Pointer // []*mBucket
mask uint32
pred unsafe.Pointer // *mNode
resizeInProgess int32
overflow int32
growThreshold int32
shrinkThreshold int32
}
func (n *mNode) initBucket(i uint32) *mBucket {
if b := (*mBucket)(atomic.LoadPointer(&n.buckets[i])); b != nil {
return b
}
p := (*mNode)(atomic.LoadPointer(&n.pred))
if p != nil {
var node []*Node
if n.mask > p.mask {
// Grow.
pb := (*mBucket)(atomic.LoadPointer(&p.buckets[i&p.mask]))
if pb == nil {
pb = p.initBucket(i & p.mask)
}
m := pb.freeze()
// Split nodes.
for _, x := range m {
if x.hash&n.mask == i {
node = append(node, x)
}
}
} else {
// Shrink.
pb0 := (*mBucket)(atomic.LoadPointer(&p.buckets[i]))
if pb0 == nil {
pb0 = p.initBucket(i)
}
pb1 := (*mBucket)(atomic.LoadPointer(&p.buckets[i+uint32(len(n.buckets))]))
if pb1 == nil {
pb1 = p.initBucket(i + uint32(len(n.buckets)))
}
m0 := pb0.freeze()
m1 := pb1.freeze()
// Merge nodes.
node = make([]*Node, 0, len(m0)+len(m1))
node = append(node, m0...)
node = append(node, m1...)
}
b := &mBucket{node: node}
if atomic.CompareAndSwapPointer(&n.buckets[i], nil, unsafe.Pointer(b)) {
if len(node) > mOverflowThreshold {
atomic.AddInt32(&n.overflow, int32(len(node)-mOverflowThreshold))
}
return b
}
}
return (*mBucket)(atomic.LoadPointer(&n.buckets[i]))
}
func (n *mNode) initBuckets() {
for i := range n.buckets {
n.initBucket(uint32(i))
}
atomic.StorePointer(&n.pred, nil)
}
// Cache is a 'cache map'.
type Cache struct {
mu sync.RWMutex
mHead unsafe.Pointer // *mNode
nodes int32
size int32
cacher Cacher
closed bool
}
// NewCache creates a new 'cache map'. The cacher is optional and
// may be nil.
func NewCache(cacher Cacher) *Cache {
h := &mNode{
buckets: make([]unsafe.Pointer, mInitialSize),
mask: mInitialSize - 1,
growThreshold: int32(mInitialSize * mOverflowThreshold),
shrinkThreshold: 0,
}
for i := range h.buckets {
h.buckets[i] = unsafe.Pointer(&mBucket{})
}
r := &Cache{
mHead: unsafe.Pointer(h),
cacher: cacher,
}
return r
}
func (r *Cache) getBucket(hash uint32) (*mNode, *mBucket) {
h := (*mNode)(atomic.LoadPointer(&r.mHead))
i := hash & h.mask
b := (*mBucket)(atomic.LoadPointer(&h.buckets[i]))
if b == nil {
b = h.initBucket(i)
}
return h, b
}
func (r *Cache) delete(n *Node) bool {
for {
h, b := r.getBucket(n.hash)
done, deleted := b.delete(r, h, n.hash, n.ns, n.key)
if done {
return deleted
}
}
}
// Nodes returns number of 'cache node' in the map.
func (r *Cache) Nodes() int {
return int(atomic.LoadInt32(&r.nodes))
}
// Size returns sums of 'cache node' size in the map.
func (r *Cache) Size() int {
return int(atomic.LoadInt32(&r.size))
}
// Capacity returns cache capacity.
func (r *Cache) Capacity() int {
if r.cacher == nil {
return 0
}
return r.cacher.Capacity()
}
// SetCapacity sets cache capacity.
func (r *Cache) SetCapacity(capacity int) {
if r.cacher != nil {
r.cacher.SetCapacity(capacity)
}
}
// Get gets 'cache node' with the given namespace and key.
// If cache node is not found and setFunc is not nil, Get will atomically creates
// the 'cache node' by calling setFunc. Otherwise Get will returns nil.
//
// The returned 'cache handle' should be released after use by calling Release
// method.
func (r *Cache) Get(ns, key uint64, setFunc func() (size int, value Value)) *Handle {
r.mu.RLock()
defer r.mu.RUnlock()
if r.closed {
return nil
}
hash := murmur32(ns, key, 0xf00)
for {
h, b := r.getBucket(hash)
done, _, n := b.get(r, h, hash, ns, key, setFunc == nil)
if done {
if n != nil {
n.mu.Lock()
if n.value == nil {
if setFunc == nil {
n.mu.Unlock()
n.unref()
return nil
}
n.size, n.value = setFunc()
if n.value == nil {
n.size = 0
n.mu.Unlock()
n.unref()
return nil
}
atomic.AddInt32(&r.size, int32(n.size))
}
n.mu.Unlock()
if r.cacher != nil {
r.cacher.Promote(n)
}
return &Handle{unsafe.Pointer(n)}
}
break
}
}
return nil
}
// Delete removes and ban 'cache node' with the given namespace and key.
// A banned 'cache node' will never inserted into the 'cache tree'. Ban
// only attributed to the particular 'cache node', so when a 'cache node'
// is recreated it will not be banned.
//
// If onDel is not nil, then it will be executed if such 'cache node'
// doesn't exist or once the 'cache node' is released.
//
// Delete return true is such 'cache node' exist.
func (r *Cache) Delete(ns, key uint64, onDel func()) bool {
r.mu.RLock()
defer r.mu.RUnlock()
if r.closed {
return false
}
hash := murmur32(ns, key, 0xf00)
for {
h, b := r.getBucket(hash)
done, _, n := b.get(r, h, hash, ns, key, true)
if done {
if n != nil {
if onDel != nil {
n.mu.Lock()
n.onDel = append(n.onDel, onDel)
n.mu.Unlock()
}
if r.cacher != nil {
r.cacher.Ban(n)
}
n.unref()
return true
}
break
}
}
if onDel != nil {
onDel()
}
return false
}
// Evict evicts 'cache node' with the given namespace and key. This will
// simply call Cacher.Evict.
//
// Evict return true is such 'cache node' exist.
func (r *Cache) Evict(ns, key uint64) bool {
r.mu.RLock()
defer r.mu.RUnlock()
if r.closed {
return false
}
hash := murmur32(ns, key, 0xf00)
for {
h, b := r.getBucket(hash)
done, _, n := b.get(r, h, hash, ns, key, true)
if done {
if n != nil {
if r.cacher != nil {
r.cacher.Evict(n)
}
n.unref()
return true
}
break
}
}
return false
}
// EvictNS evicts 'cache node' with the given namespace. This will
// simply call Cacher.EvictNS.
func (r *Cache) EvictNS(ns uint64) {
r.mu.RLock()
defer r.mu.RUnlock()
if r.closed {
return
}
if r.cacher != nil {
r.cacher.EvictNS(ns)
}
}
// EvictAll evicts all 'cache node'. This will simply call Cacher.EvictAll.
func (r *Cache) EvictAll() {
r.mu.RLock()
defer r.mu.RUnlock()
if r.closed {
return
}
if r.cacher != nil {
r.cacher.EvictAll()
}
}
// Close closes the 'cache map' and forcefully releases all 'cache node'.
func (r *Cache) Close() error {
r.mu.Lock()
if !r.closed {
r.closed = true
h := (*mNode)(r.mHead)
h.initBuckets()
for i := range h.buckets {
b := (*mBucket)(h.buckets[i])
for _, n := range b.node {
// Call releaser.
if n.value != nil {
if r, ok := n.value.(util.Releaser); ok {
r.Release()
}
n.value = nil
}
// Call OnDel.
for _, f := range n.onDel {
f()
}
n.onDel = nil
}
}
}
r.mu.Unlock()
// Avoid deadlock.
if r.cacher != nil {
if err := r.cacher.Close(); err != nil {
return err
}
}
return nil
}
// CloseWeak closes the 'cache map' and evict all 'cache node' from cacher, but
// unlike Close it doesn't forcefully releases 'cache node'.
func (r *Cache) CloseWeak() error {
r.mu.Lock()
if !r.closed {
r.closed = true
}
r.mu.Unlock()
// Avoid deadlock.
if r.cacher != nil {
r.cacher.EvictAll()
if err := r.cacher.Close(); err != nil {
return err
}
}
return nil
}
// Node is a 'cache node'.
type Node struct {
r *Cache
hash uint32
ns, key uint64
mu sync.Mutex
size int
value Value
ref int32
onDel []func()
CacheData unsafe.Pointer
}
// NS returns this 'cache node' namespace.
func (n *Node) NS() uint64 {
return n.ns
}
// Key returns this 'cache node' key.
func (n *Node) Key() uint64 {
return n.key
}
// Size returns this 'cache node' size.
func (n *Node) Size() int {
return n.size
}
// Value returns this 'cache node' value.
func (n *Node) Value() Value {
return n.value
}
// Ref returns this 'cache node' ref counter.
func (n *Node) Ref() int32 {
return atomic.LoadInt32(&n.ref)
}
// GetHandle returns an handle for this 'cache node'.
func (n *Node) GetHandle() *Handle {
if atomic.AddInt32(&n.ref, 1) <= 1 {
panic("BUG: Node.GetHandle on zero ref")
}
return &Handle{unsafe.Pointer(n)}
}
func (n *Node) unref() {
if atomic.AddInt32(&n.ref, -1) == 0 {
n.r.delete(n)
}
}
func (n *Node) unrefLocked() {
if atomic.AddInt32(&n.ref, -1) == 0 {
n.r.mu.RLock()
if !n.r.closed {
n.r.delete(n)
}
n.r.mu.RUnlock()
}
}
// Handle is a 'cache handle' of a 'cache node'.
type Handle struct {
n unsafe.Pointer // *Node
}
// Value returns the value of the 'cache node'.
func (h *Handle) Value() Value {
n := (*Node)(atomic.LoadPointer(&h.n))
if n != nil {
return n.value
}
return nil
}
// Release releases this 'cache handle'.
// It is safe to call release multiple times.
func (h *Handle) Release() {
nPtr := atomic.LoadPointer(&h.n)
if nPtr != nil && atomic.CompareAndSwapPointer(&h.n, nPtr, nil) {
n := (*Node)(nPtr)
n.unrefLocked()
}
}
func murmur32(ns, key uint64, seed uint32) uint32 {
const (
m = uint32(0x5bd1e995)
r = 24
)
k1 := uint32(ns >> 32)
k2 := uint32(ns)
k3 := uint32(key >> 32)
k4 := uint32(key)
k1 *= m
k1 ^= k1 >> r
k1 *= m
k2 *= m
k2 ^= k2 >> r
k2 *= m
k3 *= m
k3 ^= k3 >> r
k3 *= m
k4 *= m
k4 ^= k4 >> r
k4 *= m
h := seed
h *= m
h ^= k1
h *= m
h ^= k2
h *= m
h ^= k3
h *= m
h ^= k4
h ^= h >> 13
h *= m
h ^= h >> 15
return h
}

195
vendor/github.com/syndtr/goleveldb/leveldb/cache/lru.go generated vendored Normal file
View File

@ -0,0 +1,195 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package cache
import (
"sync"
"unsafe"
)
type lruNode struct {
n *Node
h *Handle
ban bool
next, prev *lruNode
}
func (n *lruNode) insert(at *lruNode) {
x := at.next
at.next = n
n.prev = at
n.next = x
x.prev = n
}
func (n *lruNode) remove() {
if n.prev != nil {
n.prev.next = n.next
n.next.prev = n.prev
n.prev = nil
n.next = nil
} else {
panic("BUG: removing removed node")
}
}
type lru struct {
mu sync.Mutex
capacity int
used int
recent lruNode
}
func (r *lru) reset() {
r.recent.next = &r.recent
r.recent.prev = &r.recent
r.used = 0
}
func (r *lru) Capacity() int {
r.mu.Lock()
defer r.mu.Unlock()
return r.capacity
}
func (r *lru) SetCapacity(capacity int) {
var evicted []*lruNode
r.mu.Lock()
r.capacity = capacity
for r.used > r.capacity {
rn := r.recent.prev
if rn == nil {
panic("BUG: invalid LRU used or capacity counter")
}
rn.remove()
rn.n.CacheData = nil
r.used -= rn.n.Size()
evicted = append(evicted, rn)
}
r.mu.Unlock()
for _, rn := range evicted {
rn.h.Release()
}
}
func (r *lru) Promote(n *Node) {
var evicted []*lruNode
r.mu.Lock()
if n.CacheData == nil {
if n.Size() <= r.capacity {
rn := &lruNode{n: n, h: n.GetHandle()}
rn.insert(&r.recent)
n.CacheData = unsafe.Pointer(rn)
r.used += n.Size()
for r.used > r.capacity {
rn := r.recent.prev
if rn == nil {
panic("BUG: invalid LRU used or capacity counter")
}
rn.remove()
rn.n.CacheData = nil
r.used -= rn.n.Size()
evicted = append(evicted, rn)
}
}
} else {
rn := (*lruNode)(n.CacheData)
if !rn.ban {
rn.remove()
rn.insert(&r.recent)
}
}
r.mu.Unlock()
for _, rn := range evicted {
rn.h.Release()
}
}
func (r *lru) Ban(n *Node) {
r.mu.Lock()
if n.CacheData == nil {
n.CacheData = unsafe.Pointer(&lruNode{n: n, ban: true})
} else {
rn := (*lruNode)(n.CacheData)
if !rn.ban {
rn.remove()
rn.ban = true
r.used -= rn.n.Size()
r.mu.Unlock()
rn.h.Release()
rn.h = nil
return
}
}
r.mu.Unlock()
}
func (r *lru) Evict(n *Node) {
r.mu.Lock()
rn := (*lruNode)(n.CacheData)
if rn == nil || rn.ban {
r.mu.Unlock()
return
}
n.CacheData = nil
r.mu.Unlock()
rn.h.Release()
}
func (r *lru) EvictNS(ns uint64) {
var evicted []*lruNode
r.mu.Lock()
for e := r.recent.prev; e != &r.recent; {
rn := e
e = e.prev
if rn.n.NS() == ns {
rn.remove()
rn.n.CacheData = nil
r.used -= rn.n.Size()
evicted = append(evicted, rn)
}
}
r.mu.Unlock()
for _, rn := range evicted {
rn.h.Release()
}
}
func (r *lru) EvictAll() {
r.mu.Lock()
back := r.recent.prev
for rn := back; rn != &r.recent; rn = rn.prev {
rn.n.CacheData = nil
}
r.reset()
r.mu.Unlock()
for rn := back; rn != &r.recent; rn = rn.prev {
rn.h.Release()
}
}
func (r *lru) Close() error {
return nil
}
// NewLRU create a new LRU-cache.
func NewLRU(capacity int) Cacher {
r := &lru{capacity: capacity}
r.reset()
return r
}

67
vendor/github.com/syndtr/goleveldb/leveldb/comparer.go generated vendored Normal file
View File

@ -0,0 +1,67 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package leveldb
import (
"github.com/syndtr/goleveldb/leveldb/comparer"
)
type iComparer struct {
ucmp comparer.Comparer
}
func (icmp *iComparer) uName() string {
return icmp.ucmp.Name()
}
func (icmp *iComparer) uCompare(a, b []byte) int {
return icmp.ucmp.Compare(a, b)
}
func (icmp *iComparer) uSeparator(dst, a, b []byte) []byte {
return icmp.ucmp.Separator(dst, a, b)
}
func (icmp *iComparer) uSuccessor(dst, b []byte) []byte {
return icmp.ucmp.Successor(dst, b)
}
func (icmp *iComparer) Name() string {
return icmp.uName()
}
func (icmp *iComparer) Compare(a, b []byte) int {
x := icmp.uCompare(internalKey(a).ukey(), internalKey(b).ukey())
if x == 0 {
if m, n := internalKey(a).num(), internalKey(b).num(); m > n {
return -1
} else if m < n {
return 1
}
}
return x
}
func (icmp *iComparer) Separator(dst, a, b []byte) []byte {
ua, ub := internalKey(a).ukey(), internalKey(b).ukey()
dst = icmp.uSeparator(dst, ua, ub)
if dst != nil && len(dst) < len(ua) && icmp.uCompare(ua, dst) < 0 {
// Append earliest possible number.
return append(dst, keyMaxNumBytes...)
}
return nil
}
func (icmp *iComparer) Successor(dst, b []byte) []byte {
ub := internalKey(b).ukey()
dst = icmp.uSuccessor(dst, ub)
if dst != nil && len(dst) < len(ub) && icmp.uCompare(ub, dst) < 0 {
// Append earliest possible number.
return append(dst, keyMaxNumBytes...)
}
return nil
}

51
vendor/github.com/syndtr/goleveldb/leveldb/comparer/bytes_comparer.go generated vendored Normal file
View File

@ -0,0 +1,51 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package comparer
import "bytes"
type bytesComparer struct{}
func (bytesComparer) Compare(a, b []byte) int {
return bytes.Compare(a, b)
}
func (bytesComparer) Name() string {
return "leveldb.BytewiseComparator"
}
func (bytesComparer) Separator(dst, a, b []byte) []byte {
i, n := 0, len(a)
if n > len(b) {
n = len(b)
}
for ; i < n && a[i] == b[i]; i++ {
}
if i >= n {
// Do not shorten if one string is a prefix of the other
} else if c := a[i]; c < 0xff && c+1 < b[i] {
dst = append(dst, a[:i+1]...)
dst[len(dst)-1]++
return dst
}
return nil
}
func (bytesComparer) Successor(dst, b []byte) []byte {
for i, c := range b {
if c != 0xff {
dst = append(dst, b[:i+1]...)
dst[len(dst)-1]++
return dst
}
}
return nil
}
// DefaultComparer are default implementation of the Comparer interface.
// It uses the natural ordering, consistent with bytes.Compare.
var DefaultComparer = bytesComparer{}

57
vendor/github.com/syndtr/goleveldb/leveldb/comparer/comparer.go generated vendored Normal file
View File

@ -0,0 +1,57 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Package comparer provides interface and implementation for ordering
// sets of data.
package comparer
// BasicComparer is the interface that wraps the basic Compare method.
type BasicComparer interface {
// Compare returns -1, 0, or +1 depending on whether a is 'less than',
// 'equal to' or 'greater than' b. The two arguments can only be 'equal'
// if their contents are exactly equal. Furthermore, the empty slice
// must be 'less than' any non-empty slice.
Compare(a, b []byte) int
}
// Comparer defines a total ordering over the space of []byte keys: a 'less
// than' relationship.
type Comparer interface {
BasicComparer
// Name returns name of the comparer.
//
// The Level-DB on-disk format stores the comparer name, and opening a
// database with a different comparer from the one it was created with
// will result in an error.
//
// An implementation to a new name whenever the comparer implementation
// changes in a way that will cause the relative ordering of any two keys
// to change.
//
// Names starting with "leveldb." are reserved and should not be used
// by any users of this package.
Name() string
// Bellow are advanced functions used to reduce the space requirements
// for internal data structures such as index blocks.
// Separator appends a sequence of bytes x to dst such that a <= x && x < b,
// where 'less than' is consistent with Compare. An implementation should
// return nil if x equal to a.
//
// Either contents of a or b should not by any means modified. Doing so
// may cause corruption on the internal state.
Separator(dst, a, b []byte) []byte
// Successor appends a sequence of bytes x to dst such that x >= b, where
// 'less than' is consistent with Compare. An implementation should return
// nil if x equal to b.
//
// Contents of b should not by any means modified. Doing so may cause
// corruption on the internal state.
Successor(dst, b []byte) []byte
}

1179
vendor/github.com/syndtr/goleveldb/leveldb/db.go generated vendored Normal file
View File

File diff suppressed because it is too large Load Diff

854
vendor/github.com/syndtr/goleveldb/leveldb/db_compaction.go generated vendored Normal file
View File

@ -0,0 +1,854 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package leveldb
import (
"sync"
"time"
"github.com/syndtr/goleveldb/leveldb/errors"
"github.com/syndtr/goleveldb/leveldb/opt"
"github.com/syndtr/goleveldb/leveldb/storage"
)
var (
errCompactionTransactExiting = errors.New("leveldb: compaction transact exiting")
)
type cStat struct {
duration time.Duration
read int64
write int64
}
func (p *cStat) add(n *cStatStaging) {
p.duration += n.duration
p.read += n.read
p.write += n.write
}
func (p *cStat) get() (duration time.Duration, read, write int64) {
return p.duration, p.read, p.write
}
type cStatStaging struct {
start time.Time
duration time.Duration
on bool
read int64
write int64
}
func (p *cStatStaging) startTimer() {
if !p.on {
p.start = time.Now()
p.on = true
}
}
func (p *cStatStaging) stopTimer() {
if p.on {
p.duration += time.Since(p.start)
p.on = false
}
}
type cStats struct {
lk sync.Mutex
stats []cStat
}
func (p *cStats) addStat(level int, n *cStatStaging) {
p.lk.Lock()
if level >= len(p.stats) {
newStats := make([]cStat, level+1)
copy(newStats, p.stats)
p.stats = newStats
}
p.stats[level].add(n)
p.lk.Unlock()
}
func (p *cStats) getStat(level int) (duration time.Duration, read, write int64) {
p.lk.Lock()
defer p.lk.Unlock()
if level < len(p.stats) {
return p.stats[level].get()
}
return
}
func (db *DB) compactionError() {
var err error
noerr:
// No error.
for {
select {
case err = <-db.compErrSetC:
switch {
case err == nil:
case err == ErrReadOnly, errors.IsCorrupted(err):
goto hasperr
default:
goto haserr
}
case <-db.closeC:
return
}
}
haserr:
// Transient error.
for {
select {
case db.compErrC <- err:
case err = <-db.compErrSetC:
switch {
case err == nil:
goto noerr
case err == ErrReadOnly, errors.IsCorrupted(err):
goto hasperr
default:
}
case <-db.closeC:
return
}
}
hasperr:
// Persistent error.
for {
select {
case db.compErrC <- err:
case db.compPerErrC <- err:
case db.writeLockC <- struct{}{}:
// Hold write lock, so that write won't pass-through.
db.compWriteLocking = true
case <-db.closeC:
if db.compWriteLocking {
// We should release the lock or Close will hang.
<-db.writeLockC
}
return
}
}
}
type compactionTransactCounter int
func (cnt *compactionTransactCounter) incr() {
*cnt++
}
type compactionTransactInterface interface {
run(cnt *compactionTransactCounter) error
revert() error
}
func (db *DB) compactionTransact(name string, t compactionTransactInterface) {
defer func() {
if x := recover(); x != nil {
if x == errCompactionTransactExiting {
if err := t.revert(); err != nil {
db.logf("%s revert error %q", name, err)
}
}
panic(x)
}
}()
const (
backoffMin = 1 * time.Second
backoffMax = 8 * time.Second
backoffMul = 2 * time.Second
)
var (
backoff = backoffMin
backoffT = time.NewTimer(backoff)
lastCnt = compactionTransactCounter(0)
disableBackoff = db.s.o.GetDisableCompactionBackoff()
)
for n := 0; ; n++ {
// Check whether the DB is closed.
if db.isClosed() {
db.logf("%s exiting", name)
db.compactionExitTransact()
} else if n > 0 {
db.logf("%s retrying N·%d", name, n)
}
// Execute.
cnt := compactionTransactCounter(0)
err := t.run(&cnt)
if err != nil {
db.logf("%s error I·%d %q", name, cnt, err)
}
// Set compaction error status.
select {
case db.compErrSetC <- err:
case perr := <-db.compPerErrC:
if err != nil {
db.logf("%s exiting (persistent error %q)", name, perr)
db.compactionExitTransact()
}
case <-db.closeC:
db.logf("%s exiting", name)
db.compactionExitTransact()
}
if err == nil {
return
}
if errors.IsCorrupted(err) {
db.logf("%s exiting (corruption detected)", name)
db.compactionExitTransact()
}
if !disableBackoff {
// Reset backoff duration if counter is advancing.
if cnt > lastCnt {
backoff = backoffMin
lastCnt = cnt
}
// Backoff.
backoffT.Reset(backoff)
if backoff < backoffMax {
backoff *= backoffMul
if backoff > backoffMax {
backoff = backoffMax
}
}
select {
case <-backoffT.C:
case <-db.closeC:
db.logf("%s exiting", name)
db.compactionExitTransact()
}
}
}
}
type compactionTransactFunc struct {
runFunc func(cnt *compactionTransactCounter) error
revertFunc func() error
}
func (t *compactionTransactFunc) run(cnt *compactionTransactCounter) error {
return t.runFunc(cnt)
}
func (t *compactionTransactFunc) revert() error {
if t.revertFunc != nil {
return t.revertFunc()
}
return nil
}
func (db *DB) compactionTransactFunc(name string, run func(cnt *compactionTransactCounter) error, revert func() error) {
db.compactionTransact(name, &compactionTransactFunc{run, revert})
}
func (db *DB) compactionExitTransact() {
panic(errCompactionTransactExiting)
}
func (db *DB) compactionCommit(name string, rec *sessionRecord) {
db.compCommitLk.Lock()
defer db.compCommitLk.Unlock() // Defer is necessary.
db.compactionTransactFunc(name+"@commit", func(cnt *compactionTransactCounter) error {
return db.s.commit(rec)
}, nil)
}
func (db *DB) memCompaction() {
mdb := db.getFrozenMem()
if mdb == nil {
return
}
defer mdb.decref()
db.logf("memdb@flush N·%d S·%s", mdb.Len(), shortenb(mdb.Size()))
// Don't compact empty memdb.
if mdb.Len() == 0 {
db.logf("memdb@flush skipping")
// drop frozen memdb
db.dropFrozenMem()
return
}
// Pause table compaction.
resumeC := make(chan struct{})
select {
case db.tcompPauseC <- (chan<- struct{})(resumeC):
case <-db.compPerErrC:
close(resumeC)
resumeC = nil
case <-db.closeC:
db.compactionExitTransact()
}
var (
rec = &sessionRecord{}
stats = &cStatStaging{}
flushLevel int
)
// Generate tables.
db.compactionTransactFunc("memdb@flush", func(cnt *compactionTransactCounter) (err error) {
stats.startTimer()
flushLevel, err = db.s.flushMemdb(rec, mdb.DB, db.memdbMaxLevel)
stats.stopTimer()
return
}, func() error {
for _, r := range rec.addedTables {
db.logf("memdb@flush revert @%d", r.num)
if err := db.s.stor.Remove(storage.FileDesc{Type: storage.TypeTable, Num: r.num}); err != nil {
return err
}
}
return nil
})
rec.setJournalNum(db.journalFd.Num)
rec.setSeqNum(db.frozenSeq)
// Commit.
stats.startTimer()
db.compactionCommit("memdb", rec)
stats.stopTimer()
db.logf("memdb@flush committed F·%d T·%v", len(rec.addedTables), stats.duration)
for _, r := range rec.addedTables {
stats.write += r.size
}
db.compStats.addStat(flushLevel, stats)
// Drop frozen memdb.
db.dropFrozenMem()
// Resume table compaction.
if resumeC != nil {
select {
case <-resumeC:
close(resumeC)
case <-db.closeC:
db.compactionExitTransact()
}
}
// Trigger table compaction.
db.compTrigger(db.tcompCmdC)
}
type tableCompactionBuilder struct {
db *DB
s *session
c *compaction
rec *sessionRecord
stat0, stat1 *cStatStaging
snapHasLastUkey bool
snapLastUkey []byte
snapLastSeq uint64
snapIter int
snapKerrCnt int
snapDropCnt int
kerrCnt int
dropCnt int
minSeq uint64
strict bool
tableSize int
tw *tWriter
}
func (b *tableCompactionBuilder) appendKV(key, value []byte) error {
// Create new table if not already.
if b.tw == nil {
// Check for pause event.
if b.db != nil {
select {
case ch := <-b.db.tcompPauseC:
b.db.pauseCompaction(ch)
case <-b.db.closeC:
b.db.compactionExitTransact()
default:
}
}
// Create new table.
var err error
b.tw, err = b.s.tops.create()
if err != nil {
return err
}
}
// Write key/value into table.
return b.tw.append(key, value)
}
func (b *tableCompactionBuilder) needFlush() bool {
return b.tw.tw.BytesLen() >= b.tableSize
}
func (b *tableCompactionBuilder) flush() error {
t, err := b.tw.finish()
if err != nil {
return err
}
b.rec.addTableFile(b.c.sourceLevel+1, t)
b.stat1.write += t.size
b.s.logf("table@build created L%d@%d N·%d S·%s %q:%q", b.c.sourceLevel+1, t.fd.Num, b.tw.tw.EntriesLen(), shortenb(int(t.size)), t.imin, t.imax)
b.tw = nil
return nil
}
func (b *tableCompactionBuilder) cleanup() {
if b.tw != nil {
b.tw.drop()
b.tw = nil
}
}
func (b *tableCompactionBuilder) run(cnt *compactionTransactCounter) error {
snapResumed := b.snapIter > 0
hasLastUkey := b.snapHasLastUkey // The key might has zero length, so this is necessary.
lastUkey := append([]byte{}, b.snapLastUkey...)
lastSeq := b.snapLastSeq
b.kerrCnt = b.snapKerrCnt
b.dropCnt = b.snapDropCnt
// Restore compaction state.
b.c.restore()
defer b.cleanup()
b.stat1.startTimer()
defer b.stat1.stopTimer()
iter := b.c.newIterator()
defer iter.Release()
for i := 0; iter.Next(); i++ {
// Incr transact counter.
cnt.incr()
// Skip until last state.
if i < b.snapIter {
continue
}
resumed := false
if snapResumed {
resumed = true
snapResumed = false
}
ikey := iter.Key()
ukey, seq, kt, kerr := parseInternalKey(ikey)
if kerr == nil {
shouldStop := !resumed && b.c.shouldStopBefore(ikey)
if !hasLastUkey || b.s.icmp.uCompare(lastUkey, ukey) != 0 {
// First occurrence of this user key.
// Only rotate tables if ukey doesn't hop across.
if b.tw != nil && (shouldStop || b.needFlush()) {
if err := b.flush(); err != nil {
return err
}
// Creates snapshot of the state.
b.c.save()
b.snapHasLastUkey = hasLastUkey
b.snapLastUkey = append(b.snapLastUkey[:0], lastUkey...)
b.snapLastSeq = lastSeq
b.snapIter = i
b.snapKerrCnt = b.kerrCnt
b.snapDropCnt = b.dropCnt
}
hasLastUkey = true
lastUkey = append(lastUkey[:0], ukey...)
lastSeq = keyMaxSeq
}
switch {
case lastSeq <= b.minSeq:
// Dropped because newer entry for same user key exist
fallthrough // (A)
case kt == keyTypeDel && seq <= b.minSeq && b.c.baseLevelForKey(lastUkey):
// For this user key:
// (1) there is no data in higher levels
// (2) data in lower levels will have larger seq numbers
// (3) data in layers that are being compacted here and have
// smaller seq numbers will be dropped in the next
// few iterations of this loop (by rule (A) above).
// Therefore this deletion marker is obsolete and can be dropped.
lastSeq = seq
b.dropCnt++
continue
default:
lastSeq = seq
}
} else {
if b.strict {
return kerr
}
// Don't drop corrupted keys.
hasLastUkey = false
lastUkey = lastUkey[:0]
lastSeq = keyMaxSeq
b.kerrCnt++
}
if err := b.appendKV(ikey, iter.Value()); err != nil {
return err
}
}
if err := iter.Error(); err != nil {
return err
}
// Finish last table.
if b.tw != nil && !b.tw.empty() {
return b.flush()
}
return nil
}
func (b *tableCompactionBuilder) revert() error {
for _, at := range b.rec.addedTables {
b.s.logf("table@build revert @%d", at.num)
if err := b.s.stor.Remove(storage.FileDesc{Type: storage.TypeTable, Num: at.num}); err != nil {
return err
}
}
return nil
}
func (db *DB) tableCompaction(c *compaction, noTrivial bool) {
defer c.release()
rec := &sessionRecord{}
rec.addCompPtr(c.sourceLevel, c.imax)
if !noTrivial && c.trivial() {
t := c.levels[0][0]
db.logf("table@move L%d@%d -> L%d", c.sourceLevel, t.fd.Num, c.sourceLevel+1)
rec.delTable(c.sourceLevel, t.fd.Num)
rec.addTableFile(c.sourceLevel+1, t)
db.compactionCommit("table-move", rec)
return
}
var stats [2]cStatStaging
for i, tables := range c.levels {
for _, t := range tables {
stats[i].read += t.size
// Insert deleted tables into record
rec.delTable(c.sourceLevel+i, t.fd.Num)
}
}
sourceSize := int(stats[0].read + stats[1].read)
minSeq := db.minSeq()
db.logf("table@compaction L%d·%d -> L%d·%d S·%s Q·%d", c.sourceLevel, len(c.levels[0]), c.sourceLevel+1, len(c.levels[1]), shortenb(sourceSize), minSeq)
b := &tableCompactionBuilder{
db: db,
s: db.s,
c: c,
rec: rec,
stat1: &stats[1],
minSeq: minSeq,
strict: db.s.o.GetStrict(opt.StrictCompaction),
tableSize: db.s.o.GetCompactionTableSize(c.sourceLevel + 1),
}
db.compactionTransact("table@build", b)
// Commit.
stats[1].startTimer()
db.compactionCommit("table", rec)
stats[1].stopTimer()
resultSize := int(stats[1].write)
db.logf("table@compaction committed F%s S%s Ke·%d D·%d T·%v", sint(len(rec.addedTables)-len(rec.deletedTables)), sshortenb(resultSize-sourceSize), b.kerrCnt, b.dropCnt, stats[1].duration)
// Save compaction stats
for i := range stats {
db.compStats.addStat(c.sourceLevel+1, &stats[i])
}
}
func (db *DB) tableRangeCompaction(level int, umin, umax []byte) error {
db.logf("table@compaction range L%d %q:%q", level, umin, umax)
if level >= 0 {
if c := db.s.getCompactionRange(level, umin, umax, true); c != nil {
db.tableCompaction(c, true)
}
} else {
// Retry until nothing to compact.
for {
compacted := false
// Scan for maximum level with overlapped tables.
v := db.s.version()
m := 1
for i := m; i < len(v.levels); i++ {
tables := v.levels[i]
if tables.overlaps(db.s.icmp, umin, umax, false) {
m = i
}
}
v.release()
for level := 0; level < m; level++ {
if c := db.s.getCompactionRange(level, umin, umax, false); c != nil {
db.tableCompaction(c, true)
compacted = true
}
}
if !compacted {
break
}
}
}
return nil
}
func (db *DB) tableAutoCompaction() {
if c := db.s.pickCompaction(); c != nil {
db.tableCompaction(c, false)
}
}
func (db *DB) tableNeedCompaction() bool {
v := db.s.version()
defer v.release()
return v.needCompaction()
}
// resumeWrite returns an indicator whether we should resume write operation if enough level0 files are compacted.
func (db *DB) resumeWrite() bool {
v := db.s.version()
defer v.release()
if v.tLen(0) < db.s.o.GetWriteL0PauseTrigger() {
return true
}
return false
}
func (db *DB) pauseCompaction(ch chan<- struct{}) {
select {
case ch <- struct{}{}:
case <-db.closeC:
db.compactionExitTransact()
}
}
type cCmd interface {
ack(err error)
}
type cAuto struct {
// Note for table compaction, an non-empty ackC represents it's a compaction waiting command.
ackC chan<- error
}
func (r cAuto) ack(err error) {
if r.ackC != nil {
defer func() {
recover()
}()
r.ackC <- err
}
}
type cRange struct {
level int
min, max []byte
ackC chan<- error
}
func (r cRange) ack(err error) {
if r.ackC != nil {
defer func() {
recover()
}()
r.ackC <- err
}
}
// This will trigger auto compaction but will not wait for it.
func (db *DB) compTrigger(compC chan<- cCmd) {
select {
case compC <- cAuto{}:
default:
}
}
// This will trigger auto compaction and/or wait for all compaction to be done.
func (db *DB) compTriggerWait(compC chan<- cCmd) (err error) {
ch := make(chan error)
defer close(ch)
// Send cmd.
select {
case compC <- cAuto{ch}:
case err = <-db.compErrC:
return
case <-db.closeC:
return ErrClosed
}
// Wait cmd.
select {
case err = <-ch:
case err = <-db.compErrC:
case <-db.closeC:
return ErrClosed
}
return err
}
// Send range compaction request.
func (db *DB) compTriggerRange(compC chan<- cCmd, level int, min, max []byte) (err error) {
ch := make(chan error)
defer close(ch)
// Send cmd.
select {
case compC <- cRange{level, min, max, ch}:
case err := <-db.compErrC:
return err
case <-db.closeC:
return ErrClosed
}
// Wait cmd.
select {
case err = <-ch:
case err = <-db.compErrC:
case <-db.closeC:
return ErrClosed
}
return err
}
func (db *DB) mCompaction() {
var x cCmd
defer func() {
if x := recover(); x != nil {
if x != errCompactionTransactExiting {
panic(x)
}
}
if x != nil {
x.ack(ErrClosed)
}
db.closeW.Done()
}()
for {
select {
case x = <-db.mcompCmdC:
switch x.(type) {
case cAuto:
db.memCompaction()
x.ack(nil)
x = nil
default:
panic("leveldb: unknown command")
}
case <-db.closeC:
return
}
}
}
func (db *DB) tCompaction() {
var (
x cCmd
waitQ []cCmd
)
defer func() {
if x := recover(); x != nil {
if x != errCompactionTransactExiting {
panic(x)
}
}
for i := range waitQ {
waitQ[i].ack(ErrClosed)
waitQ[i] = nil
}
if x != nil {
x.ack(ErrClosed)
}
db.closeW.Done()
}()
for {
if db.tableNeedCompaction() {
select {
case x = <-db.tcompCmdC:
case ch := <-db.tcompPauseC:
db.pauseCompaction(ch)
continue
case <-db.closeC:
return
default:
}
// Resume write operation as soon as possible.
if len(waitQ) > 0 && db.resumeWrite() {
for i := range waitQ {
waitQ[i].ack(nil)
waitQ[i] = nil
}
waitQ = waitQ[:0]
}
} else {
for i := range waitQ {
waitQ[i].ack(nil)
waitQ[i] = nil
}
waitQ = waitQ[:0]
select {
case x = <-db.tcompCmdC:
case ch := <-db.tcompPauseC:
db.pauseCompaction(ch)
continue
case <-db.closeC:
return
}
}
if x != nil {
switch cmd := x.(type) {
case cAuto:
if cmd.ackC != nil {
// Check the write pause state before caching it.
if db.resumeWrite() {
x.ack(nil)
} else {
waitQ = append(waitQ, x)
}
}
case cRange:
x.ack(db.tableRangeCompaction(cmd.level, cmd.min, cmd.max))
default:
panic("leveldb: unknown command")
}
x = nil
}
db.tableAutoCompaction()
}
}

360
vendor/github.com/syndtr/goleveldb/leveldb/db_iter.go generated vendored Normal file
View File

@ -0,0 +1,360 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package leveldb
import (
"errors"
"math/rand"
"runtime"
"sync"
"sync/atomic"
"github.com/syndtr/goleveldb/leveldb/iterator"
"github.com/syndtr/goleveldb/leveldb/opt"
"github.com/syndtr/goleveldb/leveldb/util"
)
var (
errInvalidInternalKey = errors.New("leveldb: Iterator: invalid internal key")
)
type memdbReleaser struct {
once sync.Once
m *memDB
}
func (mr *memdbReleaser) Release() {
mr.once.Do(func() {
mr.m.decref()
})
}
func (db *DB) newRawIterator(auxm *memDB, auxt tFiles, slice *util.Range, ro *opt.ReadOptions) iterator.Iterator {
strict := opt.GetStrict(db.s.o.Options, ro, opt.StrictReader)
em, fm := db.getMems()
v := db.s.version()
tableIts := v.getIterators(slice, ro)
n := len(tableIts) + len(auxt) + 3
its := make([]iterator.Iterator, 0, n)
if auxm != nil {
ami := auxm.NewIterator(slice)
ami.SetReleaser(&memdbReleaser{m: auxm})
its = append(its, ami)
}
for _, t := range auxt {
its = append(its, v.s.tops.newIterator(t, slice, ro))
}
emi := em.NewIterator(slice)
emi.SetReleaser(&memdbReleaser{m: em})
its = append(its, emi)
if fm != nil {
fmi := fm.NewIterator(slice)
fmi.SetReleaser(&memdbReleaser{m: fm})
its = append(its, fmi)
}
its = append(its, tableIts...)
mi := iterator.NewMergedIterator(its, db.s.icmp, strict)
mi.SetReleaser(&versionReleaser{v: v})
return mi
}
func (db *DB) newIterator(auxm *memDB, auxt tFiles, seq uint64, slice *util.Range, ro *opt.ReadOptions) *dbIter {
var islice *util.Range
if slice != nil {
islice = &util.Range{}
if slice.Start != nil {
islice.Start = makeInternalKey(nil, slice.Start, keyMaxSeq, keyTypeSeek)
}
if slice.Limit != nil {
islice.Limit = makeInternalKey(nil, slice.Limit, keyMaxSeq, keyTypeSeek)
}
}
rawIter := db.newRawIterator(auxm, auxt, islice, ro)
iter := &dbIter{
db: db,
icmp: db.s.icmp,
iter: rawIter,
seq: seq,
strict: opt.GetStrict(db.s.o.Options, ro, opt.StrictReader),
key: make([]byte, 0),
value: make([]byte, 0),
}
atomic.AddInt32(&db.aliveIters, 1)
runtime.SetFinalizer(iter, (*dbIter).Release)
return iter
}
func (db *DB) iterSamplingRate() int {
return rand.Intn(2 * db.s.o.GetIteratorSamplingRate())
}
type dir int
const (
dirReleased dir = iota - 1
dirSOI
dirEOI
dirBackward
dirForward
)
// dbIter represent an interator states over a database session.
type dbIter struct {
db *DB
icmp *iComparer
iter iterator.Iterator
seq uint64
strict bool
smaplingGap int
dir dir
key []byte
value []byte
err error
releaser util.Releaser
}
func (i *dbIter) sampleSeek() {
ikey := i.iter.Key()
i.smaplingGap -= len(ikey) + len(i.iter.Value())
for i.smaplingGap < 0 {
i.smaplingGap += i.db.iterSamplingRate()
i.db.sampleSeek(ikey)
}
}
func (i *dbIter) setErr(err error) {
i.err = err
i.key = nil
i.value = nil
}
func (i *dbIter) iterErr() {
if err := i.iter.Error(); err != nil {
i.setErr(err)
}
}
func (i *dbIter) Valid() bool {
return i.err == nil && i.dir > dirEOI
}
func (i *dbIter) First() bool {
if i.err != nil {
return false
} else if i.dir == dirReleased {
i.err = ErrIterReleased
return false
}
if i.iter.First() {
i.dir = dirSOI
return i.next()
}
i.dir = dirEOI
i.iterErr()
return false
}
func (i *dbIter) Last() bool {
if i.err != nil {
return false
} else if i.dir == dirReleased {
i.err = ErrIterReleased
return false
}
if i.iter.Last() {
return i.prev()
}
i.dir = dirSOI
i.iterErr()
return false
}
func (i *dbIter) Seek(key []byte) bool {
if i.err != nil {
return false
} else if i.dir == dirReleased {
i.err = ErrIterReleased
return false
}
ikey := makeInternalKey(nil, key, i.seq, keyTypeSeek)
if i.iter.Seek(ikey) {
i.dir = dirSOI
return i.next()
}
i.dir = dirEOI
i.iterErr()
return false
}
func (i *dbIter) next() bool {
for {
if ukey, seq, kt, kerr := parseInternalKey(i.iter.Key()); kerr == nil {
i.sampleSeek()
if seq <= i.seq {
switch kt {
case keyTypeDel:
// Skip deleted key.
i.key = append(i.key[:0], ukey...)
i.dir = dirForward
case keyTypeVal:
if i.dir == dirSOI || i.icmp.uCompare(ukey, i.key) > 0 {
i.key = append(i.key[:0], ukey...)
i.value = append(i.value[:0], i.iter.Value()...)
i.dir = dirForward
return true
}
}
}
} else if i.strict {
i.setErr(kerr)
break
}
if !i.iter.Next() {
i.dir = dirEOI
i.iterErr()
break
}
}
return false
}
func (i *dbIter) Next() bool {
if i.dir == dirEOI || i.err != nil {
return false
} else if i.dir == dirReleased {
i.err = ErrIterReleased
return false
}
if !i.iter.Next() || (i.dir == dirBackward && !i.iter.Next()) {
i.dir = dirEOI
i.iterErr()
return false
}
return i.next()
}
func (i *dbIter) prev() bool {
i.dir = dirBackward
del := true
if i.iter.Valid() {
for {
if ukey, seq, kt, kerr := parseInternalKey(i.iter.Key()); kerr == nil {
i.sampleSeek()
if seq <= i.seq {
if !del && i.icmp.uCompare(ukey, i.key) < 0 {
return true
}
del = (kt == keyTypeDel)
if !del {
i.key = append(i.key[:0], ukey...)
i.value = append(i.value[:0], i.iter.Value()...)
}
}
} else if i.strict {
i.setErr(kerr)
return false
}
if !i.iter.Prev() {
break
}
}
}
if del {
i.dir = dirSOI
i.iterErr()
return false
}
return true
}
func (i *dbIter) Prev() bool {
if i.dir == dirSOI || i.err != nil {
return false
} else if i.dir == dirReleased {
i.err = ErrIterReleased
return false
}
switch i.dir {
case dirEOI:
return i.Last()
case dirForward:
for i.iter.Prev() {
if ukey, _, _, kerr := parseInternalKey(i.iter.Key()); kerr == nil {
i.sampleSeek()
if i.icmp.uCompare(ukey, i.key) < 0 {
goto cont
}
} else if i.strict {
i.setErr(kerr)
return false
}
}
i.dir = dirSOI
i.iterErr()
return false
}
cont:
return i.prev()
}
func (i *dbIter) Key() []byte {
if i.err != nil || i.dir <= dirEOI {
return nil
}
return i.key
}
func (i *dbIter) Value() []byte {
if i.err != nil || i.dir <= dirEOI {
return nil
}
return i.value
}
func (i *dbIter) Release() {
if i.dir != dirReleased {
// Clear the finalizer.
runtime.SetFinalizer(i, nil)
if i.releaser != nil {
i.releaser.Release()
i.releaser = nil
}
i.dir = dirReleased
i.key = nil
i.value = nil
i.iter.Release()
i.iter = nil
atomic.AddInt32(&i.db.aliveIters, -1)
i.db = nil
}
}
func (i *dbIter) SetReleaser(releaser util.Releaser) {
if i.dir == dirReleased {
panic(util.ErrReleased)
}
if i.releaser != nil && releaser != nil {
panic(util.ErrHasReleaser)
}
i.releaser = releaser
}
func (i *dbIter) Error() error {
return i.err
}

187
vendor/github.com/syndtr/goleveldb/leveldb/db_snapshot.go generated vendored Normal file
View File

@ -0,0 +1,187 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package leveldb
import (
"container/list"
"fmt"
"runtime"
"sync"
"sync/atomic"
"github.com/syndtr/goleveldb/leveldb/iterator"
"github.com/syndtr/goleveldb/leveldb/opt"
"github.com/syndtr/goleveldb/leveldb/util"
)
type snapshotElement struct {
seq uint64
ref int
e *list.Element
}
// Acquires a snapshot, based on latest sequence.
func (db *DB) acquireSnapshot() *snapshotElement {
db.snapsMu.Lock()
defer db.snapsMu.Unlock()
seq := db.getSeq()
if e := db.snapsList.Back(); e != nil {
se := e.Value.(*snapshotElement)
if se.seq == seq {
se.ref++
return se
} else if seq < se.seq {
panic("leveldb: sequence number is not increasing")
}
}
se := &snapshotElement{seq: seq, ref: 1}
se.e = db.snapsList.PushBack(se)
return se
}
// Releases given snapshot element.
func (db *DB) releaseSnapshot(se *snapshotElement) {
db.snapsMu.Lock()
defer db.snapsMu.Unlock()
se.ref--
if se.ref == 0 {
db.snapsList.Remove(se.e)
se.e = nil
} else if se.ref < 0 {
panic("leveldb: Snapshot: negative element reference")
}
}
// Gets minimum sequence that not being snapshotted.
func (db *DB) minSeq() uint64 {
db.snapsMu.Lock()
defer db.snapsMu.Unlock()
if e := db.snapsList.Front(); e != nil {
return e.Value.(*snapshotElement).seq
}
return db.getSeq()
}
// Snapshot is a DB snapshot.
type Snapshot struct {
db *DB
elem *snapshotElement
mu sync.RWMutex
released bool
}
// Creates new snapshot object.
func (db *DB) newSnapshot() *Snapshot {
snap := &Snapshot{
db: db,
elem: db.acquireSnapshot(),
}
atomic.AddInt32(&db.aliveSnaps, 1)
runtime.SetFinalizer(snap, (*Snapshot).Release)
return snap
}
func (snap *Snapshot) String() string {
return fmt.Sprintf("leveldb.Snapshot{%d}", snap.elem.seq)
}
// Get gets the value for the given key. It returns ErrNotFound if
// the DB does not contains the key.
//
// The caller should not modify the contents of the returned slice, but
// it is safe to modify the contents of the argument after Get returns.
func (snap *Snapshot) Get(key []byte, ro *opt.ReadOptions) (value []byte, err error) {
err = snap.db.ok()
if err != nil {
return
}
snap.mu.RLock()
defer snap.mu.RUnlock()
if snap.released {
err = ErrSnapshotReleased
return
}
return snap.db.get(nil, nil, key, snap.elem.seq, ro)
}
// Has returns true if the DB does contains the given key.
//
// It is safe to modify the contents of the argument after Get returns.
func (snap *Snapshot) Has(key []byte, ro *opt.ReadOptions) (ret bool, err error) {
err = snap.db.ok()
if err != nil {
return
}
snap.mu.RLock()
defer snap.mu.RUnlock()
if snap.released {
err = ErrSnapshotReleased
return
}
return snap.db.has(nil, nil, key, snap.elem.seq, ro)
}
// NewIterator returns an iterator for the snapshot of the underlying DB.
// The returned iterator is not safe for concurrent use, but it is safe to use
// multiple iterators concurrently, with each in a dedicated goroutine.
// It is also safe to use an iterator concurrently with modifying its
// underlying DB. The resultant key/value pairs are guaranteed to be
// consistent.
//
// Slice allows slicing the iterator to only contains keys in the given
// range. A nil Range.Start is treated as a key before all keys in the
// DB. And a nil Range.Limit is treated as a key after all keys in
// the DB.
//
// WARNING: Any slice returned by interator (e.g. slice returned by calling
// Iterator.Key() or Iterator.Value() methods), its content should not be
// modified unless noted otherwise.
//
// The iterator must be released after use, by calling Release method.
// Releasing the snapshot doesn't mean releasing the iterator too, the
// iterator would be still valid until released.
//
// Also read Iterator documentation of the leveldb/iterator package.
func (snap *Snapshot) NewIterator(slice *util.Range, ro *opt.ReadOptions) iterator.Iterator {
if err := snap.db.ok(); err != nil {
return iterator.NewEmptyIterator(err)
}
snap.mu.Lock()
defer snap.mu.Unlock()
if snap.released {
return iterator.NewEmptyIterator(ErrSnapshotReleased)
}
// Since iterator already hold version ref, it doesn't need to
// hold snapshot ref.
return snap.db.newIterator(nil, nil, snap.elem.seq, slice, ro)
}
// Release releases the snapshot. This will not release any returned
// iterators, the iterators would still be valid until released or the
// underlying DB is closed.
//
// Other methods should not be called after the snapshot has been released.
func (snap *Snapshot) Release() {
snap.mu.Lock()
defer snap.mu.Unlock()
if !snap.released {
// Clear the finalizer.
runtime.SetFinalizer(snap, nil)
snap.released = true
snap.db.releaseSnapshot(snap.elem)
atomic.AddInt32(&snap.db.aliveSnaps, -1)
snap.db = nil
snap.elem = nil
}
}

239
vendor/github.com/syndtr/goleveldb/leveldb/db_state.go generated vendored Normal file
View File

@ -0,0 +1,239 @@
// Copyright (c) 2013, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package leveldb
import (
"errors"
"sync/atomic"
"time"
"github.com/syndtr/goleveldb/leveldb/journal"
"github.com/syndtr/goleveldb/leveldb/memdb"
"github.com/syndtr/goleveldb/leveldb/storage"
)
var (
errHasFrozenMem = errors.New("has frozen mem")
)
type memDB struct {
db *DB
*memdb.DB
ref int32
}
func (m *memDB) getref() int32 {
return atomic.LoadInt32(&m.ref)
}
func (m *memDB) incref() {
atomic.AddInt32(&m.ref, 1)
}
func (m *memDB) decref() {
if ref := atomic.AddInt32(&m.ref, -1); ref == 0 {
// Only put back memdb with std capacity.
if m.Capacity() == m.db.s.o.GetWriteBuffer() {
m.Reset()
m.db.mpoolPut(m.DB)
}
m.db = nil
m.DB = nil
} else if ref < 0 {
panic("negative memdb ref")
}
}
// Get latest sequence number.
func (db *DB) getSeq() uint64 {
return atomic.LoadUint64(&db.seq)
}
// Atomically adds delta to seq.
func (db *DB) addSeq(delta uint64) {
atomic.AddUint64(&db.seq, delta)
}
func (db *DB) setSeq(seq uint64) {
atomic.StoreUint64(&db.seq, seq)
}
func (db *DB) sampleSeek(ikey internalKey) {
v := db.s.version()
if v.sampleSeek(ikey) {
// Trigger table compaction.
db.compTrigger(db.tcompCmdC)
}
v.release()
}
func (db *DB) mpoolPut(mem *memdb.DB) {
if !db.isClosed() {
select {
case db.memPool <- mem:
default:
}
}
}
func (db *DB) mpoolGet(n int) *memDB {
var mdb *memdb.DB
select {
case mdb = <-db.memPool:
default:
}
if mdb == nil || mdb.Capacity() < n {
mdb = memdb.New(db.s.icmp, maxInt(db.s.o.GetWriteBuffer(), n))
}
return &memDB{
db: db,
DB: mdb,
}
}
func (db *DB) mpoolDrain() {
ticker := time.NewTicker(30 * time.Second)
for {
select {
case <-ticker.C:
select {
case <-db.memPool:
default:
}
case <-db.closeC:
ticker.Stop()
// Make sure the pool is drained.
select {
case <-db.memPool:
case <-time.After(time.Second):
}
close(db.memPool)
return
}
}
}
// Create new memdb and froze the old one; need external synchronization.
// newMem only called synchronously by the writer.
func (db *DB) newMem(n int) (mem *memDB, err error) {
fd := storage.FileDesc{Type: storage.TypeJournal, Num: db.s.allocFileNum()}
w, err := db.s.stor.Create(fd)
if err != nil {
db.s.reuseFileNum(fd.Num)
return
}
db.memMu.Lock()
defer db.memMu.Unlock()
if db.frozenMem != nil {
return nil, errHasFrozenMem
}
if db.journal == nil {
db.journal = journal.NewWriter(w)
} else {
db.journal.Reset(w)
db.journalWriter.Close()
db.frozenJournalFd = db.journalFd
}
db.journalWriter = w
db.journalFd = fd
db.frozenMem = db.mem
mem = db.mpoolGet(n)
mem.incref() // for self
mem.incref() // for caller
db.mem = mem
// The seq only incremented by the writer. And whoever called newMem
// should hold write lock, so no need additional synchronization here.
db.frozenSeq = db.seq
return
}
// Get all memdbs.
func (db *DB) getMems() (e, f *memDB) {
db.memMu.RLock()
defer db.memMu.RUnlock()
if db.mem != nil {
db.mem.incref()
} else if !db.isClosed() {
panic("nil effective mem")
}
if db.frozenMem != nil {
db.frozenMem.incref()
}
return db.mem, db.frozenMem
}
// Get effective memdb.
func (db *DB) getEffectiveMem() *memDB {
db.memMu.RLock()
defer db.memMu.RUnlock()
if db.mem != nil {
db.mem.incref()
} else if !db.isClosed() {
panic("nil effective mem")
}
return db.mem
}
// Check whether we has frozen memdb.
func (db *DB) hasFrozenMem() bool {
db.memMu.RLock()
defer db.memMu.RUnlock()
return db.frozenMem != nil
}
// Get frozen memdb.
func (db *DB) getFrozenMem() *memDB {
db.memMu.RLock()
defer db.memMu.RUnlock()
if db.frozenMem != nil {
db.frozenMem.incref()
}
return db.frozenMem
}
// Drop frozen memdb; assume that frozen memdb isn't nil.
func (db *DB) dropFrozenMem() {
db.memMu.Lock()
if err := db.s.stor.Remove(db.frozenJournalFd); err != nil {
db.logf("journal@remove removing @%d %q", db.frozenJournalFd.Num, err)
} else {
db.logf("journal@remove removed @%d", db.frozenJournalFd.Num)
}
db.frozenJournalFd = storage.FileDesc{}
db.frozenMem.decref()
db.frozenMem = nil
db.memMu.Unlock()
}
// Clear mems ptr; used by DB.Close().
func (db *DB) clearMems() {
db.memMu.Lock()
db.mem = nil
db.frozenMem = nil
db.memMu.Unlock()
}
// Set closed flag; return true if not already closed.
func (db *DB) setClosed() bool {
return atomic.CompareAndSwapUint32(&db.closed, 0, 1)
}
// Check whether DB was closed.
func (db *DB) isClosed() bool {
return atomic.LoadUint32(&db.closed) != 0
}
// Check read ok status.
func (db *DB) ok() error {
if db.isClosed() {
return ErrClosed
}
return nil
}

329
vendor/github.com/syndtr/goleveldb/leveldb/db_transaction.go generated vendored Normal file
View File

@ -0,0 +1,329 @@
// Copyright (c) 2016, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package leveldb
import (
"errors"
"sync"
"time"
"github.com/syndtr/goleveldb/leveldb/iterator"
"github.com/syndtr/goleveldb/leveldb/opt"
"github.com/syndtr/goleveldb/leveldb/util"
)
var errTransactionDone = errors.New("leveldb: transaction already closed")
// Transaction is the transaction handle.
type Transaction struct {
db *DB
lk sync.RWMutex
seq uint64
mem *memDB
tables tFiles
ikScratch []byte
rec sessionRecord
stats cStatStaging
closed bool
}
// Get gets the value for the given key. It returns ErrNotFound if the
// DB does not contains the key.
//
// The returned slice is its own copy, it is safe to modify the contents
// of the returned slice.
// It is safe to modify the contents of the argument after Get returns.
func (tr *Transaction) Get(key []byte, ro *opt.ReadOptions) ([]byte, error) {
tr.lk.RLock()
defer tr.lk.RUnlock()
if tr.closed {
return nil, errTransactionDone
}
return tr.db.get(tr.mem.DB, tr.tables, key, tr.seq, ro)
}
// Has returns true if the DB does contains the given key.
//
// It is safe to modify the contents of the argument after Has returns.
func (tr *Transaction) Has(key []byte, ro *opt.ReadOptions) (bool, error) {
tr.lk.RLock()
defer tr.lk.RUnlock()
if tr.closed {
return false, errTransactionDone
}
return tr.db.has(tr.mem.DB, tr.tables, key, tr.seq, ro)
}
// NewIterator returns an iterator for the latest snapshot of the transaction.
// The returned iterator is not safe for concurrent use, but it is safe to use
// multiple iterators concurrently, with each in a dedicated goroutine.
// It is also safe to use an iterator concurrently while writes to the
// transaction. The resultant key/value pairs are guaranteed to be consistent.
//
// Slice allows slicing the iterator to only contains keys in the given
// range. A nil Range.Start is treated as a key before all keys in the
// DB. And a nil Range.Limit is treated as a key after all keys in
// the DB.
//
// WARNING: Any slice returned by interator (e.g. slice returned by calling
// Iterator.Key() or Iterator.Key() methods), its content should not be modified
// unless noted otherwise.
//
// The iterator must be released after use, by calling Release method.
//
// Also read Iterator documentation of the leveldb/iterator package.
func (tr *Transaction) NewIterator(slice *util.Range, ro *opt.ReadOptions) iterator.Iterator {
tr.lk.RLock()
defer tr.lk.RUnlock()
if tr.closed {
return iterator.NewEmptyIterator(errTransactionDone)
}
tr.mem.incref()
return tr.db.newIterator(tr.mem, tr.tables, tr.seq, slice, ro)
}
func (tr *Transaction) flush() error {
// Flush memdb.
if tr.mem.Len() != 0 {
tr.stats.startTimer()
iter := tr.mem.NewIterator(nil)
t, n, err := tr.db.s.tops.createFrom(iter)
iter.Release()
tr.stats.stopTimer()
if err != nil {
return err
}
if tr.mem.getref() == 1 {
tr.mem.Reset()
} else {
tr.mem.decref()
tr.mem = tr.db.mpoolGet(0)
tr.mem.incref()
}
tr.tables = append(tr.tables, t)
tr.rec.addTableFile(0, t)
tr.stats.write += t.size
tr.db.logf("transaction@flush created L0@%d N·%d S·%s %q:%q", t.fd.Num, n, shortenb(int(t.size)), t.imin, t.imax)
}
return nil
}
func (tr *Transaction) put(kt keyType, key, value []byte) error {
tr.ikScratch = makeInternalKey(tr.ikScratch, key, tr.seq+1, kt)
if tr.mem.Free() < len(tr.ikScratch)+len(value) {
if err := tr.flush(); err != nil {
return err
}
}
if err := tr.mem.Put(tr.ikScratch, value); err != nil {
return err
}
tr.seq++
return nil
}
// Put sets the value for the given key. It overwrites any previous value
// for that key; a DB is not a multi-map.
// Please note that the transaction is not compacted until committed, so if you
// writes 10 same keys, then those 10 same keys are in the transaction.
//
// It is safe to modify the contents of the arguments after Put returns.
func (tr *Transaction) Put(key, value []byte, wo *opt.WriteOptions) error {
tr.lk.Lock()
defer tr.lk.Unlock()
if tr.closed {
return errTransactionDone
}
return tr.put(keyTypeVal, key, value)
}
// Delete deletes the value for the given key.
// Please note that the transaction is not compacted until committed, so if you
// writes 10 same keys, then those 10 same keys are in the transaction.
//
// It is safe to modify the contents of the arguments after Delete returns.
func (tr *Transaction) Delete(key []byte, wo *opt.WriteOptions) error {
tr.lk.Lock()
defer tr.lk.Unlock()
if tr.closed {
return errTransactionDone
}
return tr.put(keyTypeDel, key, nil)
}
// Write apply the given batch to the transaction. The batch will be applied
// sequentially.
// Please note that the transaction is not compacted until committed, so if you
// writes 10 same keys, then those 10 same keys are in the transaction.
//
// It is safe to modify the contents of the arguments after Write returns.
func (tr *Transaction) Write(b *Batch, wo *opt.WriteOptions) error {
if b == nil || b.Len() == 0 {
return nil
}
tr.lk.Lock()
defer tr.lk.Unlock()
if tr.closed {
return errTransactionDone
}
return b.replayInternal(func(i int, kt keyType, k, v []byte) error {
return tr.put(kt, k, v)
})
}
func (tr *Transaction) setDone() {
tr.closed = true
tr.db.tr = nil
tr.mem.decref()
<-tr.db.writeLockC
}
// Commit commits the transaction. If error is not nil, then the transaction is
// not committed, it can then either be retried or discarded.
//
// Other methods should not be called after transaction has been committed.
func (tr *Transaction) Commit() error {
if err := tr.db.ok(); err != nil {
return err
}
tr.lk.Lock()
defer tr.lk.Unlock()
if tr.closed {
return errTransactionDone
}
if err := tr.flush(); err != nil {
// Return error, lets user decide either to retry or discard
// transaction.
return err
}
if len(tr.tables) != 0 {
// Committing transaction.
tr.rec.setSeqNum(tr.seq)
tr.db.compCommitLk.Lock()
tr.stats.startTimer()
var cerr error
for retry := 0; retry < 3; retry++ {
cerr = tr.db.s.commit(&tr.rec)
if cerr != nil {
tr.db.logf("transaction@commit error R·%d %q", retry, cerr)
select {
case <-time.After(time.Second):
case <-tr.db.closeC:
tr.db.logf("transaction@commit exiting")
tr.db.compCommitLk.Unlock()
return cerr
}
} else {
// Success. Set db.seq.
tr.db.setSeq(tr.seq)
break
}
}
tr.stats.stopTimer()
if cerr != nil {
// Return error, lets user decide either to retry or discard
// transaction.
return cerr
}
// Update compaction stats. This is safe as long as we hold compCommitLk.
tr.db.compStats.addStat(0, &tr.stats)
// Trigger table auto-compaction.
tr.db.compTrigger(tr.db.tcompCmdC)
tr.db.compCommitLk.Unlock()
// Additionally, wait compaction when certain threshold reached.
// Ignore error, returns error only if transaction can't be committed.
tr.db.waitCompaction()
}
// Only mark as done if transaction committed successfully.
tr.setDone()
return nil
}
func (tr *Transaction) discard() {
// Discard transaction.
for _, t := range tr.tables {
tr.db.logf("transaction@discard @%d", t.fd.Num)
if err1 := tr.db.s.stor.Remove(t.fd); err1 == nil {
tr.db.s.reuseFileNum(t.fd.Num)
}
}
}
// Discard discards the transaction.
//
// Other methods should not be called after transaction has been discarded.
func (tr *Transaction) Discard() {
tr.lk.Lock()
if !tr.closed {
tr.discard()
tr.setDone()
}
tr.lk.Unlock()
}
func (db *DB) waitCompaction() error {
if db.s.tLen(0) >= db.s.o.GetWriteL0PauseTrigger() {
return db.compTriggerWait(db.tcompCmdC)
}
return nil
}
// OpenTransaction opens an atomic DB transaction. Only one transaction can be
// opened at a time. Subsequent call to Write and OpenTransaction will be blocked
// until in-flight transaction is committed or discarded.
// The returned transaction handle is safe for concurrent use.
//
// Transaction is expensive and can overwhelm compaction, especially if
// transaction size is small. Use with caution.
//
// The transaction must be closed once done, either by committing or discarding
// the transaction.
// Closing the DB will discard open transaction.
func (db *DB) OpenTransaction() (*Transaction, error) {
if err := db.ok(); err != nil {
return nil, err
}
// The write happen synchronously.
select {
case db.writeLockC <- struct{}{}:
case err := <-db.compPerErrC:
return nil, err
case <-db.closeC:
return nil, ErrClosed
}
if db.tr != nil {
panic("leveldb: has open transaction")
}
// Flush current memdb.
if db.mem != nil && db.mem.Len() != 0 {
if _, err := db.rotateMem(0, true); err != nil {
return nil, err
}
}
// Wait compaction when certain threshold reached.
if err := db.waitCompaction(); err != nil {
return nil, err
}
tr := &Transaction{
db: db,
seq: db.seq,
mem: db.mpoolGet(0),
}
tr.mem.incref()
db.tr = tr
return tr, nil
}

102
vendor/github.com/syndtr/goleveldb/leveldb/db_util.go generated vendored Normal file
View File

@ -0,0 +1,102 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package leveldb
import (
"github.com/syndtr/goleveldb/leveldb/errors"
"github.com/syndtr/goleveldb/leveldb/iterator"
"github.com/syndtr/goleveldb/leveldb/opt"
"github.com/syndtr/goleveldb/leveldb/storage"
"github.com/syndtr/goleveldb/leveldb/util"
)
// Reader is the interface that wraps basic Get and NewIterator methods.
// This interface implemented by both DB and Snapshot.
type Reader interface {
Get(key []byte, ro *opt.ReadOptions) (value []byte, err error)
NewIterator(slice *util.Range, ro *opt.ReadOptions) iterator.Iterator
}
// Sizes is list of size.
type Sizes []int64
// Sum returns sum of the sizes.
func (sizes Sizes) Sum() int64 {
var sum int64
for _, size := range sizes {
sum += size
}
return sum
}
// Logging.
func (db *DB) log(v ...interface{}) { db.s.log(v...) }
func (db *DB) logf(format string, v ...interface{}) { db.s.logf(format, v...) }
// Check and clean files.
func (db *DB) checkAndCleanFiles() error {
v := db.s.version()
defer v.release()
tmap := make(map[int64]bool)
for _, tables := range v.levels {
for _, t := range tables {
tmap[t.fd.Num] = false
}
}
fds, err := db.s.stor.List(storage.TypeAll)
if err != nil {
return err
}
var nt int
var rem []storage.FileDesc
for _, fd := range fds {
keep := true
switch fd.Type {
case storage.TypeManifest:
keep = fd.Num >= db.s.manifestFd.Num
case storage.TypeJournal:
if !db.frozenJournalFd.Zero() {
keep = fd.Num >= db.frozenJournalFd.Num
} else {
keep = fd.Num >= db.journalFd.Num
}
case storage.TypeTable:
_, keep = tmap[fd.Num]
if keep {
tmap[fd.Num] = true
nt++
}
}
if !keep {
rem = append(rem, fd)
}
}
if nt != len(tmap) {
var mfds []storage.FileDesc
for num, present := range tmap {
if !present {
mfds = append(mfds, storage.FileDesc{Type: storage.TypeTable, Num: num})
db.logf("db@janitor table missing @%d", num)
}
}
return errors.NewErrCorrupted(storage.FileDesc{}, &errors.ErrMissingFiles{Fds: mfds})
}
db.logf("db@janitor F·%d G·%d", len(fds), len(rem))
for _, fd := range rem {
db.logf("db@janitor removing %s-%d", fd.Type, fd.Num)
if err := db.s.stor.Remove(fd); err != nil {
return err
}
}
return nil
}

464
vendor/github.com/syndtr/goleveldb/leveldb/db_write.go generated vendored Normal file
View File

@ -0,0 +1,464 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package leveldb
import (
"sync/atomic"
"time"
"github.com/syndtr/goleveldb/leveldb/memdb"
"github.com/syndtr/goleveldb/leveldb/opt"
"github.com/syndtr/goleveldb/leveldb/util"
)
func (db *DB) writeJournal(batches []*Batch, seq uint64, sync bool) error {
wr, err := db.journal.Next()
if err != nil {
return err
}
if err := writeBatchesWithHeader(wr, batches, seq); err != nil {
return err
}
if err := db.journal.Flush(); err != nil {
return err
}
if sync {
return db.journalWriter.Sync()
}
return nil
}
func (db *DB) rotateMem(n int, wait bool) (mem *memDB, err error) {
retryLimit := 3
retry:
// Wait for pending memdb compaction.
err = db.compTriggerWait(db.mcompCmdC)
if err != nil {
return
}
retryLimit--
// Create new memdb and journal.
mem, err = db.newMem(n)
if err != nil {
if err == errHasFrozenMem {
if retryLimit <= 0 {
panic("BUG: still has frozen memdb")
}
goto retry
}
return
}
// Schedule memdb compaction.
if wait {
err = db.compTriggerWait(db.mcompCmdC)
} else {
db.compTrigger(db.mcompCmdC)
}
return
}
func (db *DB) flush(n int) (mdb *memDB, mdbFree int, err error) {
delayed := false
slowdownTrigger := db.s.o.GetWriteL0SlowdownTrigger()
pauseTrigger := db.s.o.GetWriteL0PauseTrigger()
flush := func() (retry bool) {
mdb = db.getEffectiveMem()
if mdb == nil {
err = ErrClosed
return false
}
defer func() {
if retry {
mdb.decref()
mdb = nil
}
}()
tLen := db.s.tLen(0)
mdbFree = mdb.Free()
switch {
case tLen >= slowdownTrigger && !delayed:
delayed = true
time.Sleep(time.Millisecond)
case mdbFree >= n:
return false
case tLen >= pauseTrigger:
delayed = true
// Set the write paused flag explicitly.
atomic.StoreInt32(&db.inWritePaused, 1)
err = db.compTriggerWait(db.tcompCmdC)
// Unset the write paused flag.
atomic.StoreInt32(&db.inWritePaused, 0)
if err != nil {
return false
}
default:
// Allow memdb to grow if it has no entry.
if mdb.Len() == 0 {
mdbFree = n
} else {
mdb.decref()
mdb, err = db.rotateMem(n, false)
if err == nil {
mdbFree = mdb.Free()
} else {
mdbFree = 0
}
}
return false
}
return true
}
start := time.Now()
for flush() {
}
if delayed {
db.writeDelay += time.Since(start)
db.writeDelayN++
} else if db.writeDelayN > 0 {
db.logf("db@write was delayed N·%d T·%v", db.writeDelayN, db.writeDelay)
atomic.AddInt32(&db.cWriteDelayN, int32(db.writeDelayN))
atomic.AddInt64(&db.cWriteDelay, int64(db.writeDelay))
db.writeDelay = 0
db.writeDelayN = 0
}
return
}
type writeMerge struct {
sync bool
batch *Batch
keyType keyType
key, value []byte
}
func (db *DB) unlockWrite(overflow bool, merged int, err error) {
for i := 0; i < merged; i++ {
db.writeAckC <- err
}
if overflow {
// Pass lock to the next write (that failed to merge).
db.writeMergedC <- false
} else {
// Release lock.
<-db.writeLockC
}
}
// ourBatch is batch that we can modify.
func (db *DB) writeLocked(batch, ourBatch *Batch, merge, sync bool) error {
// Try to flush memdb. This method would also trying to throttle writes
// if it is too fast and compaction cannot catch-up.
mdb, mdbFree, err := db.flush(batch.internalLen)
if err != nil {
db.unlockWrite(false, 0, err)
return err
}
defer mdb.decref()
var (
overflow bool
merged int
batches = []*Batch{batch}
)
if merge {
// Merge limit.
var mergeLimit int
if batch.internalLen > 128<<10 {
mergeLimit = (1 << 20) - batch.internalLen
} else {
mergeLimit = 128 << 10
}
mergeCap := mdbFree - batch.internalLen
if mergeLimit > mergeCap {
mergeLimit = mergeCap
}
merge:
for mergeLimit > 0 {
select {
case incoming := <-db.writeMergeC:
if incoming.batch != nil {
// Merge batch.
if incoming.batch.internalLen > mergeLimit {
overflow = true
break merge
}
batches = append(batches, incoming.batch)
mergeLimit -= incoming.batch.internalLen
} else {
// Merge put.
internalLen := len(incoming.key) + len(incoming.value) + 8
if internalLen > mergeLimit {
overflow = true
break merge
}
if ourBatch == nil {
ourBatch = db.batchPool.Get().(*Batch)
ourBatch.Reset()
batches = append(batches, ourBatch)
}
// We can use same batch since concurrent write doesn't
// guarantee write order.
ourBatch.appendRec(incoming.keyType, incoming.key, incoming.value)
mergeLimit -= internalLen
}
sync = sync || incoming.sync
merged++
db.writeMergedC <- true
default:
break merge
}
}
}
// Release ourBatch if any.
if ourBatch != nil {
defer db.batchPool.Put(ourBatch)
}
// Seq number.
seq := db.seq + 1
// Write journal.
if err := db.writeJournal(batches, seq, sync); err != nil {
db.unlockWrite(overflow, merged, err)
return err
}
// Put batches.
for _, batch := range batches {
if err := batch.putMem(seq, mdb.DB); err != nil {
panic(err)
}
seq += uint64(batch.Len())
}
// Incr seq number.
db.addSeq(uint64(batchesLen(batches)))
// Rotate memdb if it's reach the threshold.
if batch.internalLen >= mdbFree {
db.rotateMem(0, false)
}
db.unlockWrite(overflow, merged, nil)
return nil
}
// Write apply the given batch to the DB. The batch records will be applied
// sequentially. Write might be used concurrently, when used concurrently and
// batch is small enough, write will try to merge the batches. Set NoWriteMerge
// option to true to disable write merge.
//
// It is safe to modify the contents of the arguments after Write returns but
// not before. Write will not modify content of the batch.
func (db *DB) Write(batch *Batch, wo *opt.WriteOptions) error {
if err := db.ok(); err != nil || batch == nil || batch.Len() == 0 {
return err
}
// If the batch size is larger than write buffer, it may justified to write
// using transaction instead. Using transaction the batch will be written
// into tables directly, skipping the journaling.
if batch.internalLen > db.s.o.GetWriteBuffer() && !db.s.o.GetDisableLargeBatchTransaction() {
tr, err := db.OpenTransaction()
if err != nil {
return err
}
if err := tr.Write(batch, wo); err != nil {
tr.Discard()
return err
}
return tr.Commit()
}
merge := !wo.GetNoWriteMerge() && !db.s.o.GetNoWriteMerge()
sync := wo.GetSync() && !db.s.o.GetNoSync()
// Acquire write lock.
if merge {
select {
case db.writeMergeC <- writeMerge{sync: sync, batch: batch}:
if <-db.writeMergedC {
// Write is merged.
return <-db.writeAckC
}
// Write is not merged, the write lock is handed to us. Continue.
case db.writeLockC <- struct{}{}:
// Write lock acquired.
case err := <-db.compPerErrC:
// Compaction error.
return err
case <-db.closeC:
// Closed
return ErrClosed
}
} else {
select {
case db.writeLockC <- struct{}{}:
// Write lock acquired.
case err := <-db.compPerErrC:
// Compaction error.
return err
case <-db.closeC:
// Closed
return ErrClosed
}
}
return db.writeLocked(batch, nil, merge, sync)
}
func (db *DB) putRec(kt keyType, key, value []byte, wo *opt.WriteOptions) error {
if err := db.ok(); err != nil {
return err
}
merge := !wo.GetNoWriteMerge() && !db.s.o.GetNoWriteMerge()
sync := wo.GetSync() && !db.s.o.GetNoSync()
// Acquire write lock.
if merge {
select {
case db.writeMergeC <- writeMerge{sync: sync, keyType: kt, key: key, value: value}:
if <-db.writeMergedC {
// Write is merged.
return <-db.writeAckC
}
// Write is not merged, the write lock is handed to us. Continue.
case db.writeLockC <- struct{}{}:
// Write lock acquired.
case err := <-db.compPerErrC:
// Compaction error.
return err
case <-db.closeC:
// Closed
return ErrClosed
}
} else {
select {
case db.writeLockC <- struct{}{}:
// Write lock acquired.
case err := <-db.compPerErrC:
// Compaction error.
return err
case <-db.closeC:
// Closed
return ErrClosed
}
}
batch := db.batchPool.Get().(*Batch)
batch.Reset()
batch.appendRec(kt, key, value)
return db.writeLocked(batch, batch, merge, sync)
}
// Put sets the value for the given key. It overwrites any previous value
// for that key; a DB is not a multi-map. Write merge also applies for Put, see
// Write.
//
// It is safe to modify the contents of the arguments after Put returns but not
// before.
func (db *DB) Put(key, value []byte, wo *opt.WriteOptions) error {
return db.putRec(keyTypeVal, key, value, wo)
}
// Delete deletes the value for the given key. Delete will not returns error if
// key doesn't exist. Write merge also applies for Delete, see Write.
//
// It is safe to modify the contents of the arguments after Delete returns but
// not before.
func (db *DB) Delete(key []byte, wo *opt.WriteOptions) error {
return db.putRec(keyTypeDel, key, nil, wo)
}
func isMemOverlaps(icmp *iComparer, mem *memdb.DB, min, max []byte) bool {
iter := mem.NewIterator(nil)
defer iter.Release()
return (max == nil || (iter.First() && icmp.uCompare(max, internalKey(iter.Key()).ukey()) >= 0)) &&
(min == nil || (iter.Last() && icmp.uCompare(min, internalKey(iter.Key()).ukey()) <= 0))
}
// CompactRange compacts the underlying DB for the given key range.
// In particular, deleted and overwritten versions are discarded,
// and the data is rearranged to reduce the cost of operations
// needed to access the data. This operation should typically only
// be invoked by users who understand the underlying implementation.
//
// A nil Range.Start is treated as a key before all keys in the DB.
// And a nil Range.Limit is treated as a key after all keys in the DB.
// Therefore if both is nil then it will compact entire DB.
func (db *DB) CompactRange(r util.Range) error {
if err := db.ok(); err != nil {
return err
}
// Lock writer.
select {
case db.writeLockC <- struct{}{}:
case err := <-db.compPerErrC:
return err
case <-db.closeC:
return ErrClosed
}
// Check for overlaps in memdb.
mdb := db.getEffectiveMem()
if mdb == nil {
return ErrClosed
}
defer mdb.decref()
if isMemOverlaps(db.s.icmp, mdb.DB, r.Start, r.Limit) {
// Memdb compaction.
if _, err := db.rotateMem(0, false); err != nil {
<-db.writeLockC
return err
}
<-db.writeLockC
if err := db.compTriggerWait(db.mcompCmdC); err != nil {
return err
}
} else {
<-db.writeLockC
}
// Table compaction.
return db.compTriggerRange(db.tcompCmdC, -1, r.Start, r.Limit)
}
// SetReadOnly makes DB read-only. It will stay read-only until reopened.
func (db *DB) SetReadOnly() error {
if err := db.ok(); err != nil {
return err
}
// Lock writer.
select {
case db.writeLockC <- struct{}{}:
db.compWriteLocking = true
case err := <-db.compPerErrC:
return err
case <-db.closeC:
return ErrClosed
}
// Set compaction read-only.
select {
case db.compErrSetC <- ErrReadOnly:
case perr := <-db.compPerErrC:
return perr
case <-db.closeC:
return ErrClosed
}
return nil
}

92
vendor/github.com/syndtr/goleveldb/leveldb/doc.go generated vendored Normal file
View File

@ -0,0 +1,92 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Package leveldb provides implementation of LevelDB key/value database.
//
// Create or open a database:
//
// // The returned DB instance is safe for concurrent use. Which mean that all
// // DB's methods may be called concurrently from multiple goroutine.
// db, err := leveldb.OpenFile("path/to/db", nil)
// ...
// defer db.Close()
// ...
//
// Read or modify the database content:
//
// // Remember that the contents of the returned slice should not be modified.
// data, err := db.Get([]byte("key"), nil)
// ...
// err = db.Put([]byte("key"), []byte("value"), nil)
// ...
// err = db.Delete([]byte("key"), nil)
// ...
//
// Iterate over database content:
//
// iter := db.NewIterator(nil, nil)
// for iter.Next() {
// // Remember that the contents of the returned slice should not be modified, and
// // only valid until the next call to Next.
// key := iter.Key()
// value := iter.Value()
// ...
// }
// iter.Release()
// err = iter.Error()
// ...
//
// Iterate over subset of database content with a particular prefix:
// iter := db.NewIterator(util.BytesPrefix([]byte("foo-")), nil)
// for iter.Next() {
// // Use key/value.
// ...
// }
// iter.Release()
// err = iter.Error()
// ...
//
// Seek-then-Iterate:
//
// iter := db.NewIterator(nil, nil)
// for ok := iter.Seek(key); ok; ok = iter.Next() {
// // Use key/value.
// ...
// }
// iter.Release()
// err = iter.Error()
// ...
//
// Iterate over subset of database content:
//
// iter := db.NewIterator(&util.Range{Start: []byte("foo"), Limit: []byte("xoo")}, nil)
// for iter.Next() {
// // Use key/value.
// ...
// }
// iter.Release()
// err = iter.Error()
// ...
//
// Batch writes:
//
// batch := new(leveldb.Batch)
// batch.Put([]byte("foo"), []byte("value"))
// batch.Put([]byte("bar"), []byte("another value"))
// batch.Delete([]byte("baz"))
// err = db.Write(batch, nil)
// ...
//
// Use bloom filter:
//
// o := &opt.Options{
// Filter: filter.NewBloomFilter(10),
// }
// db, err := leveldb.OpenFile("path/to/db", o)
// ...
// defer db.Close()
// ...
package leveldb

20
vendor/github.com/syndtr/goleveldb/leveldb/errors.go generated vendored Normal file
View File

@ -0,0 +1,20 @@
// Copyright (c) 2014, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package leveldb
import (
"github.com/syndtr/goleveldb/leveldb/errors"
)
// Common errors.
var (
ErrNotFound = errors.ErrNotFound
ErrReadOnly = errors.New("leveldb: read-only mode")
ErrSnapshotReleased = errors.New("leveldb: snapshot released")
ErrIterReleased = errors.New("leveldb: iterator released")
ErrClosed = errors.New("leveldb: closed")
)

78
vendor/github.com/syndtr/goleveldb/leveldb/errors/errors.go generated vendored Normal file
View File

@ -0,0 +1,78 @@
// Copyright (c) 2014, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Package errors provides common error types used throughout leveldb.
package errors
import (
"errors"
"fmt"
"github.com/syndtr/goleveldb/leveldb/storage"
"github.com/syndtr/goleveldb/leveldb/util"
)
// Common errors.
var (
ErrNotFound = New("leveldb: not found")
ErrReleased = util.ErrReleased
ErrHasReleaser = util.ErrHasReleaser
)
// New returns an error that formats as the given text.
func New(text string) error {
return errors.New(text)
}
// ErrCorrupted is the type that wraps errors that indicate corruption in
// the database.
type ErrCorrupted struct {
Fd storage.FileDesc
Err error
}
func (e *ErrCorrupted) Error() string {
if !e.Fd.Zero() {
return fmt.Sprintf("%v [file=%v]", e.Err, e.Fd)
}
return e.Err.Error()
}
// NewErrCorrupted creates new ErrCorrupted error.
func NewErrCorrupted(fd storage.FileDesc, err error) error {
return &ErrCorrupted{fd, err}
}
// IsCorrupted returns a boolean indicating whether the error is indicating
// a corruption.
func IsCorrupted(err error) bool {
switch err.(type) {
case *ErrCorrupted:
return true
case *storage.ErrCorrupted:
return true
}
return false
}
// ErrMissingFiles is the type that indicating a corruption due to missing
// files. ErrMissingFiles always wrapped with ErrCorrupted.
type ErrMissingFiles struct {
Fds []storage.FileDesc
}
func (e *ErrMissingFiles) Error() string { return "file missing" }
// SetFd sets 'file info' of the given error with the given file.
// Currently only ErrCorrupted is supported, otherwise will do nothing.
func SetFd(err error, fd storage.FileDesc) error {
switch x := err.(type) {
case *ErrCorrupted:
x.Fd = fd
return x
}
return err
}

31
vendor/github.com/syndtr/goleveldb/leveldb/filter.go generated vendored Normal file
View File

@ -0,0 +1,31 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package leveldb
import (
"github.com/syndtr/goleveldb/leveldb/filter"
)
type iFilter struct {
filter.Filter
}
func (f iFilter) Contains(filter, key []byte) bool {
return f.Filter.Contains(filter, internalKey(key).ukey())
}
func (f iFilter) NewGenerator() filter.FilterGenerator {
return iFilterGenerator{f.Filter.NewGenerator()}
}
type iFilterGenerator struct {
filter.FilterGenerator
}
func (g iFilterGenerator) Add(key []byte) {
g.FilterGenerator.Add(internalKey(key).ukey())
}

116
vendor/github.com/syndtr/goleveldb/leveldb/filter/bloom.go generated vendored Normal file
View File

@ -0,0 +1,116 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package filter
import (
"github.com/syndtr/goleveldb/leveldb/util"
)
func bloomHash(key []byte) uint32 {
return util.Hash(key, 0xbc9f1d34)
}
type bloomFilter int
// The bloom filter serializes its parameters and is backward compatible
// with respect to them. Therefor, its parameters are not added to its
// name.
func (bloomFilter) Name() string {
return "leveldb.BuiltinBloomFilter"
}
func (f bloomFilter) Contains(filter, key []byte) bool {
nBytes := len(filter) - 1
if nBytes < 1 {
return false
}
nBits := uint32(nBytes * 8)
// Use the encoded k so that we can read filters generated by
// bloom filters created using different parameters.
k := filter[nBytes]
if k > 30 {
// Reserved for potentially new encodings for short bloom filters.
// Consider it a match.
return true
}
kh := bloomHash(key)
delta := (kh >> 17) | (kh << 15) // Rotate right 17 bits
for j := uint8(0); j < k; j++ {
bitpos := kh % nBits
if (uint32(filter[bitpos/8]) & (1 << (bitpos % 8))) == 0 {
return false
}
kh += delta
}
return true
}
func (f bloomFilter) NewGenerator() FilterGenerator {
// Round down to reduce probing cost a little bit.
k := uint8(f * 69 / 100) // 0.69 =~ ln(2)
if k < 1 {
k = 1
} else if k > 30 {
k = 30
}
return &bloomFilterGenerator{
n: int(f),
k: k,
}
}
type bloomFilterGenerator struct {
n int
k uint8
keyHashes []uint32
}
func (g *bloomFilterGenerator) Add(key []byte) {
// Use double-hashing to generate a sequence of hash values.
// See analysis in [Kirsch,Mitzenmacher 2006].
g.keyHashes = append(g.keyHashes, bloomHash(key))
}
func (g *bloomFilterGenerator) Generate(b Buffer) {
// Compute bloom filter size (in both bits and bytes)
nBits := uint32(len(g.keyHashes) * g.n)
// For small n, we can see a very high false positive rate. Fix it
// by enforcing a minimum bloom filter length.
if nBits < 64 {
nBits = 64
}
nBytes := (nBits + 7) / 8
nBits = nBytes * 8
dest := b.Alloc(int(nBytes) + 1)
dest[nBytes] = g.k
for _, kh := range g.keyHashes {
delta := (kh >> 17) | (kh << 15) // Rotate right 17 bits
for j := uint8(0); j < g.k; j++ {
bitpos := kh % nBits
dest[bitpos/8] |= (1 << (bitpos % 8))
kh += delta
}
}
g.keyHashes = g.keyHashes[:0]
}
// NewBloomFilter creates a new initialized bloom filter for given
// bitsPerKey.
//
// Since bitsPerKey is persisted individually for each bloom filter
// serialization, bloom filters are backwards compatible with respect to
// changing bitsPerKey. This means that no big performance penalty will
// be experienced when changing the parameter. See documentation for
// opt.Options.Filter for more information.
func NewBloomFilter(bitsPerKey int) Filter {
return bloomFilter(bitsPerKey)
}

60
vendor/github.com/syndtr/goleveldb/leveldb/filter/filter.go generated vendored Normal file
View File

@ -0,0 +1,60 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Package filter provides interface and implementation of probabilistic
// data structure.
//
// The filter is resposible for creating small filter from a set of keys.
// These filter will then used to test whether a key is a member of the set.
// In many cases, a filter can cut down the number of disk seeks from a
// handful to a single disk seek per DB.Get call.
package filter
// Buffer is the interface that wraps basic Alloc, Write and WriteByte methods.
type Buffer interface {
// Alloc allocs n bytes of slice from the buffer. This also advancing
// write offset.
Alloc(n int) []byte
// Write appends the contents of p to the buffer.
Write(p []byte) (n int, err error)
// WriteByte appends the byte c to the buffer.
WriteByte(c byte) error
}
// Filter is the filter.
type Filter interface {
// Name returns the name of this policy.
//
// Note that if the filter encoding changes in an incompatible way,
// the name returned by this method must be changed. Otherwise, old
// incompatible filters may be passed to methods of this type.
Name() string
// NewGenerator creates a new filter generator.
NewGenerator() FilterGenerator
// Contains returns true if the filter contains the given key.
//
// The filter are filters generated by the filter generator.
Contains(filter, key []byte) bool
}
// FilterGenerator is the filter generator.
type FilterGenerator interface {
// Add adds a key to the filter generator.
//
// The key may become invalid after call to this method end, therefor
// key must be copied if implementation require keeping key for later
// use. The key should not modified directly, doing so may cause
// undefined results.
Add(key []byte)
// Generate generates filters based on keys passed so far. After call
// to Generate the filter generator maybe resetted, depends on implementation.
Generate(b Buffer)
}

184
vendor/github.com/syndtr/goleveldb/leveldb/iterator/array_iter.go generated vendored Normal file
View File

@ -0,0 +1,184 @@
// Copyright (c) 2014, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package iterator
import (
"github.com/syndtr/goleveldb/leveldb/util"
)
// BasicArray is the interface that wraps basic Len and Search method.
type BasicArray interface {
// Len returns length of the array.
Len() int
// Search finds smallest index that point to a key that is greater
// than or equal to the given key.
Search(key []byte) int
}
// Array is the interface that wraps BasicArray and basic Index method.
type Array interface {
BasicArray
// Index returns key/value pair with index of i.
Index(i int) (key, value []byte)
}
// Array is the interface that wraps BasicArray and basic Get method.
type ArrayIndexer interface {
BasicArray
// Get returns a new data iterator with index of i.
Get(i int) Iterator
}
type basicArrayIterator struct {
util.BasicReleaser
array BasicArray
pos int
err error
}
func (i *basicArrayIterator) Valid() bool {
return i.pos >= 0 && i.pos < i.array.Len() && !i.Released()
}
func (i *basicArrayIterator) First() bool {
if i.Released() {
i.err = ErrIterReleased
return false
}
if i.array.Len() == 0 {
i.pos = -1
return false
}
i.pos = 0
return true
}
func (i *basicArrayIterator) Last() bool {
if i.Released() {
i.err = ErrIterReleased
return false
}
n := i.array.Len()
if n == 0 {
i.pos = 0
return false
}
i.pos = n - 1
return true
}
func (i *basicArrayIterator) Seek(key []byte) bool {
if i.Released() {
i.err = ErrIterReleased
return false
}
n := i.array.Len()
if n == 0 {
i.pos = 0
return false
}
i.pos = i.array.Search(key)
if i.pos >= n {
return false
}
return true
}
func (i *basicArrayIterator) Next() bool {
if i.Released() {
i.err = ErrIterReleased
return false
}
i.pos++
if n := i.array.Len(); i.pos >= n {
i.pos = n
return false
}
return true
}
func (i *basicArrayIterator) Prev() bool {
if i.Released() {
i.err = ErrIterReleased
return false
}
i.pos--
if i.pos < 0 {
i.pos = -1
return false
}
return true
}
func (i *basicArrayIterator) Error() error { return i.err }
type arrayIterator struct {
basicArrayIterator
array Array
pos int
key, value []byte
}
func (i *arrayIterator) updateKV() {
if i.pos == i.basicArrayIterator.pos {
return
}
i.pos = i.basicArrayIterator.pos
if i.Valid() {
i.key, i.value = i.array.Index(i.pos)
} else {
i.key = nil
i.value = nil
}
}
func (i *arrayIterator) Key() []byte {
i.updateKV()
return i.key
}
func (i *arrayIterator) Value() []byte {
i.updateKV()
return i.value
}
type arrayIteratorIndexer struct {
basicArrayIterator
array ArrayIndexer
}
func (i *arrayIteratorIndexer) Get() Iterator {
if i.Valid() {
return i.array.Get(i.basicArrayIterator.pos)
}
return nil
}
// NewArrayIterator returns an iterator from the given array.
func NewArrayIterator(array Array) Iterator {
return &arrayIterator{
basicArrayIterator: basicArrayIterator{array: array, pos: -1},
array: array,
pos: -1,
}
}
// NewArrayIndexer returns an index iterator from the given array.
func NewArrayIndexer(array ArrayIndexer) IteratorIndexer {
return &arrayIteratorIndexer{
basicArrayIterator: basicArrayIterator{array: array, pos: -1},
array: array,
}
}

242
vendor/github.com/syndtr/goleveldb/leveldb/iterator/indexed_iter.go generated vendored Normal file
View File

@ -0,0 +1,242 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package iterator
import (
"github.com/syndtr/goleveldb/leveldb/errors"
"github.com/syndtr/goleveldb/leveldb/util"
)
// IteratorIndexer is the interface that wraps CommonIterator and basic Get
// method. IteratorIndexer provides index for indexed iterator.
type IteratorIndexer interface {
CommonIterator
// Get returns a new data iterator for the current position, or nil if
// done.
Get() Iterator
}
type indexedIterator struct {
util.BasicReleaser
index IteratorIndexer
strict bool
data Iterator
err error
errf func(err error)
closed bool
}
func (i *indexedIterator) setData() {
if i.data != nil {
i.data.Release()
}
i.data = i.index.Get()
}
func (i *indexedIterator) clearData() {
if i.data != nil {
i.data.Release()
}
i.data = nil
}
func (i *indexedIterator) indexErr() {
if err := i.index.Error(); err != nil {
if i.errf != nil {
i.errf(err)
}
i.err = err
}
}
func (i *indexedIterator) dataErr() bool {
if err := i.data.Error(); err != nil {
if i.errf != nil {
i.errf(err)
}
if i.strict || !errors.IsCorrupted(err) {
i.err = err
return true
}
}
return false
}
func (i *indexedIterator) Valid() bool {
return i.data != nil && i.data.Valid()
}
func (i *indexedIterator) First() bool {
if i.err != nil {
return false
} else if i.Released() {
i.err = ErrIterReleased
return false
}
if !i.index.First() {
i.indexErr()
i.clearData()
return false
}
i.setData()
return i.Next()
}
func (i *indexedIterator) Last() bool {
if i.err != nil {
return false
} else if i.Released() {
i.err = ErrIterReleased
return false
}
if !i.index.Last() {
i.indexErr()
i.clearData()
return false
}
i.setData()
if !i.data.Last() {
if i.dataErr() {
return false
}
i.clearData()
return i.Prev()
}
return true
}
func (i *indexedIterator) Seek(key []byte) bool {
if i.err != nil {
return false
} else if i.Released() {
i.err = ErrIterReleased
return false
}
if !i.index.Seek(key) {
i.indexErr()
i.clearData()
return false
}
i.setData()
if !i.data.Seek(key) {
if i.dataErr() {
return false
}
i.clearData()
return i.Next()
}
return true
}
func (i *indexedIterator) Next() bool {
if i.err != nil {
return false
} else if i.Released() {
i.err = ErrIterReleased
return false
}
switch {
case i.data != nil && !i.data.Next():
if i.dataErr() {
return false
}
i.clearData()
fallthrough
case i.data == nil:
if !i.index.Next() {
i.indexErr()
return false
}
i.setData()
return i.Next()
}
return true
}
func (i *indexedIterator) Prev() bool {
if i.err != nil {
return false
} else if i.Released() {
i.err = ErrIterReleased
return false
}
switch {
case i.data != nil && !i.data.Prev():
if i.dataErr() {
return false
}
i.clearData()
fallthrough
case i.data == nil:
if !i.index.Prev() {
i.indexErr()
return false
}
i.setData()
if !i.data.Last() {
if i.dataErr() {
return false
}
i.clearData()
return i.Prev()
}
}
return true
}
func (i *indexedIterator) Key() []byte {
if i.data == nil {
return nil
}
return i.data.Key()
}
func (i *indexedIterator) Value() []byte {
if i.data == nil {
return nil
}
return i.data.Value()
}
func (i *indexedIterator) Release() {
i.clearData()
i.index.Release()
i.BasicReleaser.Release()
}
func (i *indexedIterator) Error() error {
if i.err != nil {
return i.err
}
if err := i.index.Error(); err != nil {
return err
}
return nil
}
func (i *indexedIterator) SetErrorCallback(f func(err error)) {
i.errf = f
}
// NewIndexedIterator returns an 'indexed iterator'. An index is iterator
// that returns another iterator, a 'data iterator'. A 'data iterator' is the
// iterator that contains actual key/value pairs.
//
// If strict is true the any 'corruption errors' (i.e errors.IsCorrupted(err) == true)
// won't be ignored and will halt 'indexed iterator', otherwise the iterator will
// continue to the next 'data iterator'. Corruption on 'index iterator' will not be
// ignored and will halt the iterator.
func NewIndexedIterator(index IteratorIndexer, strict bool) Iterator {
return &indexedIterator{index: index, strict: strict}
}

132
vendor/github.com/syndtr/goleveldb/leveldb/iterator/iter.go generated vendored Normal file
View File

@ -0,0 +1,132 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Package iterator provides interface and implementation to traverse over
// contents of a database.
package iterator
import (
"errors"
"github.com/syndtr/goleveldb/leveldb/util"
)
var (
ErrIterReleased = errors.New("leveldb/iterator: iterator released")
)
// IteratorSeeker is the interface that wraps the 'seeks method'.
type IteratorSeeker interface {
// First moves the iterator to the first key/value pair. If the iterator
// only contains one key/value pair then First and Last would moves
// to the same key/value pair.
// It returns whether such pair exist.
First() bool
// Last moves the iterator to the last key/value pair. If the iterator
// only contains one key/value pair then First and Last would moves
// to the same key/value pair.
// It returns whether such pair exist.
Last() bool
// Seek moves the iterator to the first key/value pair whose key is greater
// than or equal to the given key.
// It returns whether such pair exist.
//
// It is safe to modify the contents of the argument after Seek returns.
Seek(key []byte) bool
// Next moves the iterator to the next key/value pair.
// It returns false if the iterator is exhausted.
Next() bool
// Prev moves the iterator to the previous key/value pair.
// It returns false if the iterator is exhausted.
Prev() bool
}
// CommonIterator is the interface that wraps common iterator methods.
type CommonIterator interface {
IteratorSeeker
// util.Releaser is the interface that wraps basic Release method.
// When called Release will releases any resources associated with the
// iterator.
util.Releaser
// util.ReleaseSetter is the interface that wraps the basic SetReleaser
// method.
util.ReleaseSetter
// TODO: Remove this when ready.
Valid() bool
// Error returns any accumulated error. Exhausting all the key/value pairs
// is not considered to be an error.
Error() error
}
// Iterator iterates over a DB's key/value pairs in key order.
//
// When encounter an error any 'seeks method' will return false and will
// yield no key/value pairs. The error can be queried by calling the Error
// method. Calling Release is still necessary.
//
// An iterator must be released after use, but it is not necessary to read
// an iterator until exhaustion.
// Also, an iterator is not necessarily safe for concurrent use, but it is
// safe to use multiple iterators concurrently, with each in a dedicated
// goroutine.
type Iterator interface {
CommonIterator
// Key returns the key of the current key/value pair, or nil if done.
// The caller should not modify the contents of the returned slice, and
// its contents may change on the next call to any 'seeks method'.
Key() []byte
// Value returns the value of the current key/value pair, or nil if done.
// The caller should not modify the contents of the returned slice, and
// its contents may change on the next call to any 'seeks method'.
Value() []byte
}
// ErrorCallbackSetter is the interface that wraps basic SetErrorCallback
// method.
//
// ErrorCallbackSetter implemented by indexed and merged iterator.
type ErrorCallbackSetter interface {
// SetErrorCallback allows set an error callback of the corresponding
// iterator. Use nil to clear the callback.
SetErrorCallback(f func(err error))
}
type emptyIterator struct {
util.BasicReleaser
err error
}
func (i *emptyIterator) rErr() {
if i.err == nil && i.Released() {
i.err = ErrIterReleased
}
}
func (*emptyIterator) Valid() bool { return false }
func (i *emptyIterator) First() bool { i.rErr(); return false }
func (i *emptyIterator) Last() bool { i.rErr(); return false }
func (i *emptyIterator) Seek(key []byte) bool { i.rErr(); return false }
func (i *emptyIterator) Next() bool { i.rErr(); return false }
func (i *emptyIterator) Prev() bool { i.rErr(); return false }
func (*emptyIterator) Key() []byte { return nil }
func (*emptyIterator) Value() []byte { return nil }
func (i *emptyIterator) Error() error { return i.err }
// NewEmptyIterator creates an empty iterator. The err parameter can be
// nil, but if not nil the given err will be returned by Error method.
func NewEmptyIterator(err error) Iterator {
return &emptyIterator{err: err}
}

304
vendor/github.com/syndtr/goleveldb/leveldb/iterator/merged_iter.go generated vendored Normal file
View File

@ -0,0 +1,304 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package iterator
import (
"github.com/syndtr/goleveldb/leveldb/comparer"
"github.com/syndtr/goleveldb/leveldb/errors"
"github.com/syndtr/goleveldb/leveldb/util"
)
type dir int
const (
dirReleased dir = iota - 1
dirSOI
dirEOI
dirBackward
dirForward
)
type mergedIterator struct {
cmp comparer.Comparer
iters []Iterator
strict bool
keys [][]byte
index int
dir dir
err error
errf func(err error)
releaser util.Releaser
}
func assertKey(key []byte) []byte {
if key == nil {
panic("leveldb/iterator: nil key")
}
return key
}
func (i *mergedIterator) iterErr(iter Iterator) bool {
if err := iter.Error(); err != nil {
if i.errf != nil {
i.errf(err)
}
if i.strict || !errors.IsCorrupted(err) {
i.err = err
return true
}
}
return false
}
func (i *mergedIterator) Valid() bool {
return i.err == nil && i.dir > dirEOI
}
func (i *mergedIterator) First() bool {
if i.err != nil {
return false
} else if i.dir == dirReleased {
i.err = ErrIterReleased
return false
}
for x, iter := range i.iters {
switch {
case iter.First():
i.keys[x] = assertKey(iter.Key())
case i.iterErr(iter):
return false
default:
i.keys[x] = nil
}
}
i.dir = dirSOI
return i.next()
}
func (i *mergedIterator) Last() bool {
if i.err != nil {
return false
} else if i.dir == dirReleased {
i.err = ErrIterReleased
return false
}
for x, iter := range i.iters {
switch {
case iter.Last():
i.keys[x] = assertKey(iter.Key())
case i.iterErr(iter):
return false
default:
i.keys[x] = nil
}
}
i.dir = dirEOI
return i.prev()
}
func (i *mergedIterator) Seek(key []byte) bool {
if i.err != nil {
return false
} else if i.dir == dirReleased {
i.err = ErrIterReleased
return false
}
for x, iter := range i.iters {
switch {
case iter.Seek(key):
i.keys[x] = assertKey(iter.Key())
case i.iterErr(iter):
return false
default:
i.keys[x] = nil
}
}
i.dir = dirSOI
return i.next()
}
func (i *mergedIterator) next() bool {
var key []byte
if i.dir == dirForward {
key = i.keys[i.index]
}
for x, tkey := range i.keys {
if tkey != nil && (key == nil || i.cmp.Compare(tkey, key) < 0) {
key = tkey
i.index = x
}
}
if key == nil {
i.dir = dirEOI
return false
}
i.dir = dirForward
return true
}
func (i *mergedIterator) Next() bool {
if i.dir == dirEOI || i.err != nil {
return false
} else if i.dir == dirReleased {
i.err = ErrIterReleased
return false
}
switch i.dir {
case dirSOI:
return i.First()
case dirBackward:
key := append([]byte{}, i.keys[i.index]...)
if !i.Seek(key) {
return false
}
return i.Next()
}
x := i.index
iter := i.iters[x]
switch {
case iter.Next():
i.keys[x] = assertKey(iter.Key())
case i.iterErr(iter):
return false
default:
i.keys[x] = nil
}
return i.next()
}
func (i *mergedIterator) prev() bool {
var key []byte
if i.dir == dirBackward {
key = i.keys[i.index]
}
for x, tkey := range i.keys {
if tkey != nil && (key == nil || i.cmp.Compare(tkey, key) > 0) {
key = tkey
i.index = x
}
}
if key == nil {
i.dir = dirSOI
return false
}
i.dir = dirBackward
return true
}
func (i *mergedIterator) Prev() bool {
if i.dir == dirSOI || i.err != nil {
return false
} else if i.dir == dirReleased {
i.err = ErrIterReleased
return false
}
switch i.dir {
case dirEOI:
return i.Last()
case dirForward:
key := append([]byte{}, i.keys[i.index]...)
for x, iter := range i.iters {
if x == i.index {
continue
}
seek := iter.Seek(key)
switch {
case seek && iter.Prev(), !seek && iter.Last():
i.keys[x] = assertKey(iter.Key())
case i.iterErr(iter):
return false
default:
i.keys[x] = nil
}
}
}
x := i.index
iter := i.iters[x]
switch {
case iter.Prev():
i.keys[x] = assertKey(iter.Key())
case i.iterErr(iter):
return false
default:
i.keys[x] = nil
}
return i.prev()
}
func (i *mergedIterator) Key() []byte {
if i.err != nil || i.dir <= dirEOI {
return nil
}
return i.keys[i.index]
}
func (i *mergedIterator) Value() []byte {
if i.err != nil || i.dir <= dirEOI {
return nil
}
return i.iters[i.index].Value()
}
func (i *mergedIterator) Release() {
if i.dir != dirReleased {
i.dir = dirReleased
for _, iter := range i.iters {
iter.Release()
}
i.iters = nil
i.keys = nil
if i.releaser != nil {
i.releaser.Release()
i.releaser = nil
}
}
}
func (i *mergedIterator) SetReleaser(releaser util.Releaser) {
if i.dir == dirReleased {
panic(util.ErrReleased)
}
if i.releaser != nil && releaser != nil {
panic(util.ErrHasReleaser)
}
i.releaser = releaser
}
func (i *mergedIterator) Error() error {
return i.err
}
func (i *mergedIterator) SetErrorCallback(f func(err error)) {
i.errf = f
}
// NewMergedIterator returns an iterator that merges its input. Walking the
// resultant iterator will return all key/value pairs of all input iterators
// in strictly increasing key order, as defined by cmp.
// The input's key ranges may overlap, but there are assumed to be no duplicate
// keys: if iters[i] contains a key k then iters[j] will not contain that key k.
// None of the iters may be nil.
//
// If strict is true the any 'corruption errors' (i.e errors.IsCorrupted(err) == true)
// won't be ignored and will halt 'merged iterator', otherwise the iterator will
// continue to the next 'input iterator'.
func NewMergedIterator(iters []Iterator, cmp comparer.Comparer, strict bool) Iterator {
return &mergedIterator{
iters: iters,
cmp: cmp,
strict: strict,
keys: make([][]byte, len(iters)),
}
}

524
vendor/github.com/syndtr/goleveldb/leveldb/journal/journal.go generated vendored Normal file
View File

@ -0,0 +1,524 @@
// Copyright 2011 The LevelDB-Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Taken from: https://code.google.com/p/leveldb-go/source/browse/leveldb/record/record.go?r=1d5ccbe03246da926391ee12d1c6caae054ff4b0
// License, authors and contributors informations can be found at bellow URLs respectively:
// https://code.google.com/p/leveldb-go/source/browse/LICENSE
// https://code.google.com/p/leveldb-go/source/browse/AUTHORS
// https://code.google.com/p/leveldb-go/source/browse/CONTRIBUTORS
// Package journal reads and writes sequences of journals. Each journal is a stream
// of bytes that completes before the next journal starts.
//
// When reading, call Next to obtain an io.Reader for the next journal. Next will
// return io.EOF when there are no more journals. It is valid to call Next
// without reading the current journal to exhaustion.
//
// When writing, call Next to obtain an io.Writer for the next journal. Calling
// Next finishes the current journal. Call Close to finish the final journal.
//
// Optionally, call Flush to finish the current journal and flush the underlying
// writer without starting a new journal. To start a new journal after flushing,
// call Next.
//
// Neither Readers or Writers are safe to use concurrently.
//
// Example code:
// func read(r io.Reader) ([]string, error) {
// var ss []string
// journals := journal.NewReader(r, nil, true, true)
// for {
// j, err := journals.Next()
// if err == io.EOF {
// break
// }
// if err != nil {
// return nil, err
// }
// s, err := ioutil.ReadAll(j)
// if err != nil {
// return nil, err
// }
// ss = append(ss, string(s))
// }
// return ss, nil
// }
//
// func write(w io.Writer, ss []string) error {
// journals := journal.NewWriter(w)
// for _, s := range ss {
// j, err := journals.Next()
// if err != nil {
// return err
// }
// if _, err := j.Write([]byte(s)), err != nil {
// return err
// }
// }
// return journals.Close()
// }
//
// The wire format is that the stream is divided into 32KiB blocks, and each
// block contains a number of tightly packed chunks. Chunks cannot cross block
// boundaries. The last block may be shorter than 32 KiB. Any unused bytes in a
// block must be zero.
//
// A journal maps to one or more chunks. Each chunk has a 7 byte header (a 4
// byte checksum, a 2 byte little-endian uint16 length, and a 1 byte chunk type)
// followed by a payload. The checksum is over the chunk type and the payload.
//
// There are four chunk types: whether the chunk is the full journal, or the
// first, middle or last chunk of a multi-chunk journal. A multi-chunk journal
// has one first chunk, zero or more middle chunks, and one last chunk.
//
// The wire format allows for limited recovery in the face of data corruption:
// on a format error (such as a checksum mismatch), the reader moves to the
// next block and looks for the next full or first chunk.
package journal
import (
"encoding/binary"
"fmt"
"io"
"github.com/syndtr/goleveldb/leveldb/errors"
"github.com/syndtr/goleveldb/leveldb/storage"
"github.com/syndtr/goleveldb/leveldb/util"
)
// These constants are part of the wire format and should not be changed.
const (
fullChunkType = 1
firstChunkType = 2
middleChunkType = 3
lastChunkType = 4
)
const (
blockSize = 32 * 1024
headerSize = 7
)
type flusher interface {
Flush() error
}
// ErrCorrupted is the error type that generated by corrupted block or chunk.
type ErrCorrupted struct {
Size int
Reason string
}
func (e *ErrCorrupted) Error() string {
return fmt.Sprintf("leveldb/journal: block/chunk corrupted: %s (%d bytes)", e.Reason, e.Size)
}
// Dropper is the interface that wrap simple Drop method. The Drop
// method will be called when the journal reader dropping a block or chunk.
type Dropper interface {
Drop(err error)
}
// Reader reads journals from an underlying io.Reader.
type Reader struct {
// r is the underlying reader.
r io.Reader
// the dropper.
dropper Dropper
// strict flag.
strict bool
// checksum flag.
checksum bool
// seq is the sequence number of the current journal.
seq int
// buf[i:j] is the unread portion of the current chunk's payload.
// The low bound, i, excludes the chunk header.
i, j int
// n is the number of bytes of buf that are valid. Once reading has started,
// only the final block can have n < blockSize.
n int
// last is whether the current chunk is the last chunk of the journal.
last bool
// err is any accumulated error.
err error
// buf is the buffer.
buf [blockSize]byte
}
// NewReader returns a new reader. The dropper may be nil, and if
// strict is true then corrupted or invalid chunk will halt the journal
// reader entirely.
func NewReader(r io.Reader, dropper Dropper, strict, checksum bool) *Reader {
return &Reader{
r: r,
dropper: dropper,
strict: strict,
checksum: checksum,
last: true,
}
}
var errSkip = errors.New("leveldb/journal: skipped")
func (r *Reader) corrupt(n int, reason string, skip bool) error {
if r.dropper != nil {
r.dropper.Drop(&ErrCorrupted{n, reason})
}
if r.strict && !skip {
r.err = errors.NewErrCorrupted(storage.FileDesc{}, &ErrCorrupted{n, reason})
return r.err
}
return errSkip
}
// nextChunk sets r.buf[r.i:r.j] to hold the next chunk's payload, reading the
// next block into the buffer if necessary.
func (r *Reader) nextChunk(first bool) error {
for {
if r.j+headerSize <= r.n {
checksum := binary.LittleEndian.Uint32(r.buf[r.j+0 : r.j+4])
length := binary.LittleEndian.Uint16(r.buf[r.j+4 : r.j+6])
chunkType := r.buf[r.j+6]
unprocBlock := r.n - r.j
if checksum == 0 && length == 0 && chunkType == 0 {
// Drop entire block.
r.i = r.n
r.j = r.n
return r.corrupt(unprocBlock, "zero header", false)
}
if chunkType < fullChunkType || chunkType > lastChunkType {
// Drop entire block.
r.i = r.n
r.j = r.n
return r.corrupt(unprocBlock, fmt.Sprintf("invalid chunk type %#x", chunkType), false)
}
r.i = r.j + headerSize
r.j = r.j + headerSize + int(length)
if r.j > r.n {
// Drop entire block.
r.i = r.n
r.j = r.n
return r.corrupt(unprocBlock, "chunk length overflows block", false)
} else if r.checksum && checksum != util.NewCRC(r.buf[r.i-1:r.j]).Value() {
// Drop entire block.
r.i = r.n
r.j = r.n
return r.corrupt(unprocBlock, "checksum mismatch", false)
}
if first && chunkType != fullChunkType && chunkType != firstChunkType {
chunkLength := (r.j - r.i) + headerSize
r.i = r.j
// Report the error, but skip it.
return r.corrupt(chunkLength, "orphan chunk", true)
}
r.last = chunkType == fullChunkType || chunkType == lastChunkType
return nil
}
// The last block.
if r.n < blockSize && r.n > 0 {
if !first {
return r.corrupt(0, "missing chunk part", false)
}
r.err = io.EOF
return r.err
}
// Read block.
n, err := io.ReadFull(r.r, r.buf[:])
if err != nil && err != io.EOF && err != io.ErrUnexpectedEOF {
return err
}
if n == 0 {
if !first {
return r.corrupt(0, "missing chunk part", false)
}
r.err = io.EOF
return r.err
}
r.i, r.j, r.n = 0, 0, n
}
}
// Next returns a reader for the next journal. It returns io.EOF if there are no
// more journals. The reader returned becomes stale after the next Next call,
// and should no longer be used. If strict is false, the reader will returns
// io.ErrUnexpectedEOF error when found corrupted journal.
func (r *Reader) Next() (io.Reader, error) {
r.seq++
if r.err != nil {
return nil, r.err
}
r.i = r.j
for {
if err := r.nextChunk(true); err == nil {
break
} else if err != errSkip {
return nil, err
}
}
return &singleReader{r, r.seq, nil}, nil
}
// Reset resets the journal reader, allows reuse of the journal reader. Reset returns
// last accumulated error.
func (r *Reader) Reset(reader io.Reader, dropper Dropper, strict, checksum bool) error {
r.seq++
err := r.err
r.r = reader
r.dropper = dropper
r.strict = strict
r.checksum = checksum
r.i = 0
r.j = 0
r.n = 0
r.last = true
r.err = nil
return err
}
type singleReader struct {
r *Reader
seq int
err error
}
func (x *singleReader) Read(p []byte) (int, error) {
r := x.r
if r.seq != x.seq {
return 0, errors.New("leveldb/journal: stale reader")
}
if x.err != nil {
return 0, x.err
}
if r.err != nil {
return 0, r.err
}
for r.i == r.j {
if r.last {
return 0, io.EOF
}
x.err = r.nextChunk(false)
if x.err != nil {
if x.err == errSkip {
x.err = io.ErrUnexpectedEOF
}
return 0, x.err
}
}
n := copy(p, r.buf[r.i:r.j])
r.i += n
return n, nil
}
func (x *singleReader) ReadByte() (byte, error) {
r := x.r
if r.seq != x.seq {
return 0, errors.New("leveldb/journal: stale reader")
}
if x.err != nil {
return 0, x.err
}
if r.err != nil {
return 0, r.err
}
for r.i == r.j {
if r.last {
return 0, io.EOF
}
x.err = r.nextChunk(false)
if x.err != nil {
if x.err == errSkip {
x.err = io.ErrUnexpectedEOF
}
return 0, x.err
}
}
c := r.buf[r.i]
r.i++
return c, nil
}
// Writer writes journals to an underlying io.Writer.
type Writer struct {
// w is the underlying writer.
w io.Writer
// seq is the sequence number of the current journal.
seq int
// f is w as a flusher.
f flusher
// buf[i:j] is the bytes that will become the current chunk.
// The low bound, i, includes the chunk header.
i, j int
// buf[:written] has already been written to w.
// written is zero unless Flush has been called.
written int
// first is whether the current chunk is the first chunk of the journal.
first bool
// pending is whether a chunk is buffered but not yet written.
pending bool
// err is any accumulated error.
err error
// buf is the buffer.
buf [blockSize]byte
}
// NewWriter returns a new Writer.
func NewWriter(w io.Writer) *Writer {
f, _ := w.(flusher)
return &Writer{
w: w,
f: f,
}
}
// fillHeader fills in the header for the pending chunk.
func (w *Writer) fillHeader(last bool) {
if w.i+headerSize > w.j || w.j > blockSize {
panic("leveldb/journal: bad writer state")
}
if last {
if w.first {
w.buf[w.i+6] = fullChunkType
} else {
w.buf[w.i+6] = lastChunkType
}
} else {
if w.first {
w.buf[w.i+6] = firstChunkType
} else {
w.buf[w.i+6] = middleChunkType
}
}
binary.LittleEndian.PutUint32(w.buf[w.i+0:w.i+4], util.NewCRC(w.buf[w.i+6:w.j]).Value())
binary.LittleEndian.PutUint16(w.buf[w.i+4:w.i+6], uint16(w.j-w.i-headerSize))
}
// writeBlock writes the buffered block to the underlying writer, and reserves
// space for the next chunk's header.
func (w *Writer) writeBlock() {
_, w.err = w.w.Write(w.buf[w.written:])
w.i = 0
w.j = headerSize
w.written = 0
}
// writePending finishes the current journal and writes the buffer to the
// underlying writer.
func (w *Writer) writePending() {
if w.err != nil {
return
}
if w.pending {
w.fillHeader(true)
w.pending = false
}
_, w.err = w.w.Write(w.buf[w.written:w.j])
w.written = w.j
}
// Close finishes the current journal and closes the writer.
func (w *Writer) Close() error {
w.seq++
w.writePending()
if w.err != nil {
return w.err
}
w.err = errors.New("leveldb/journal: closed Writer")
return nil
}
// Flush finishes the current journal, writes to the underlying writer, and
// flushes it if that writer implements interface{ Flush() error }.
func (w *Writer) Flush() error {
w.seq++
w.writePending()
if w.err != nil {
return w.err
}
if w.f != nil {
w.err = w.f.Flush()
return w.err
}
return nil
}
// Reset resets the journal writer, allows reuse of the journal writer. Reset
// will also closes the journal writer if not already.
func (w *Writer) Reset(writer io.Writer) (err error) {
w.seq++
if w.err == nil {
w.writePending()
err = w.err
}
w.w = writer
w.f, _ = writer.(flusher)
w.i = 0
w.j = 0
w.written = 0
w.first = false
w.pending = false
w.err = nil
return
}
// Next returns a writer for the next journal. The writer returned becomes stale
// after the next Close, Flush or Next call, and should no longer be used.
func (w *Writer) Next() (io.Writer, error) {
w.seq++
if w.err != nil {
return nil, w.err
}
if w.pending {
w.fillHeader(true)
}
w.i = w.j
w.j = w.j + headerSize
// Check if there is room in the block for the header.
if w.j > blockSize {
// Fill in the rest of the block with zeroes.
for k := w.i; k < blockSize; k++ {
w.buf[k] = 0
}
w.writeBlock()
if w.err != nil {
return nil, w.err
}
}
w.first = true
w.pending = true
return singleWriter{w, w.seq}, nil
}
type singleWriter struct {
w *Writer
seq int
}
func (x singleWriter) Write(p []byte) (int, error) {
w := x.w
if w.seq != x.seq {
return 0, errors.New("leveldb/journal: stale writer")
}
if w.err != nil {
return 0, w.err
}
n0 := len(p)
for len(p) > 0 {
// Write a block, if it is full.
if w.j == blockSize {
w.fillHeader(false)
w.writeBlock()
if w.err != nil {
return 0, w.err
}
w.first = false
}
// Copy bytes into the buffer.
n := copy(w.buf[w.j:], p)
w.j += n
p = p[n:]
}
return n0, nil
}

143
vendor/github.com/syndtr/goleveldb/leveldb/key.go generated vendored Normal file
View File

@ -0,0 +1,143 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package leveldb
import (
"encoding/binary"
"fmt"
"github.com/syndtr/goleveldb/leveldb/errors"
"github.com/syndtr/goleveldb/leveldb/storage"
)
// ErrInternalKeyCorrupted records internal key corruption.
type ErrInternalKeyCorrupted struct {
Ikey []byte
Reason string
}
func (e *ErrInternalKeyCorrupted) Error() string {
return fmt.Sprintf("leveldb: internal key %q corrupted: %s", e.Ikey, e.Reason)
}
func newErrInternalKeyCorrupted(ikey []byte, reason string) error {
return errors.NewErrCorrupted(storage.FileDesc{}, &ErrInternalKeyCorrupted{append([]byte{}, ikey...), reason})
}
type keyType uint
func (kt keyType) String() string {
switch kt {
case keyTypeDel:
return "d"
case keyTypeVal:
return "v"
}
return fmt.Sprintf("<invalid:%#x>", uint(kt))
}
// Value types encoded as the last component of internal keys.
// Don't modify; this value are saved to disk.
const (
keyTypeDel = keyType(0)
keyTypeVal = keyType(1)
)
// keyTypeSeek defines the keyType that should be passed when constructing an
// internal key for seeking to a particular sequence number (since we
// sort sequence numbers in decreasing order and the value type is
// embedded as the low 8 bits in the sequence number in internal keys,
// we need to use the highest-numbered ValueType, not the lowest).
const keyTypeSeek = keyTypeVal
const (
// Maximum value possible for sequence number; the 8-bits are
// used by value type, so its can packed together in single
// 64-bit integer.
keyMaxSeq = (uint64(1) << 56) - 1
// Maximum value possible for packed sequence number and type.
keyMaxNum = (keyMaxSeq << 8) | uint64(keyTypeSeek)
)
// Maximum number encoded in bytes.
var keyMaxNumBytes = make([]byte, 8)
func init() {
binary.LittleEndian.PutUint64(keyMaxNumBytes, keyMaxNum)
}
type internalKey []byte
func makeInternalKey(dst, ukey []byte, seq uint64, kt keyType) internalKey {
if seq > keyMaxSeq {
panic("leveldb: invalid sequence number")
} else if kt > keyTypeVal {
panic("leveldb: invalid type")
}
dst = ensureBuffer(dst, len(ukey)+8)
copy(dst, ukey)
binary.LittleEndian.PutUint64(dst[len(ukey):], (seq<<8)|uint64(kt))
return internalKey(dst)
}
func parseInternalKey(ik []byte) (ukey []byte, seq uint64, kt keyType, err error) {
if len(ik) < 8 {
return nil, 0, 0, newErrInternalKeyCorrupted(ik, "invalid length")
}
num := binary.LittleEndian.Uint64(ik[len(ik)-8:])
seq, kt = uint64(num>>8), keyType(num&0xff)
if kt > keyTypeVal {
return nil, 0, 0, newErrInternalKeyCorrupted(ik, "invalid type")
}
ukey = ik[:len(ik)-8]
return
}
func validInternalKey(ik []byte) bool {
_, _, _, err := parseInternalKey(ik)
return err == nil
}
func (ik internalKey) assert() {
if ik == nil {
panic("leveldb: nil internalKey")
}
if len(ik) < 8 {
panic(fmt.Sprintf("leveldb: internal key %q, len=%d: invalid length", []byte(ik), len(ik)))
}
}
func (ik internalKey) ukey() []byte {
ik.assert()
return ik[:len(ik)-8]
}
func (ik internalKey) num() uint64 {
ik.assert()
return binary.LittleEndian.Uint64(ik[len(ik)-8:])
}
func (ik internalKey) parseNum() (seq uint64, kt keyType) {
num := ik.num()
seq, kt = uint64(num>>8), keyType(num&0xff)
if kt > keyTypeVal {
panic(fmt.Sprintf("leveldb: internal key %q, len=%d: invalid type %#x", []byte(ik), len(ik), kt))
}
return
}
func (ik internalKey) String() string {
if ik == nil {
return "<nil>"
}
if ukey, seq, kt, err := parseInternalKey(ik); err == nil {
return fmt.Sprintf("%s,%s%d", shorten(string(ukey)), kt, seq)
}
return fmt.Sprintf("<invalid:%#x>", []byte(ik))
}

479
vendor/github.com/syndtr/goleveldb/leveldb/memdb/memdb.go generated vendored Normal file
View File

@ -0,0 +1,479 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Package memdb provides in-memory key/value database implementation.
package memdb
import (
"math/rand"
"sync"
"github.com/syndtr/goleveldb/leveldb/comparer"
"github.com/syndtr/goleveldb/leveldb/errors"
"github.com/syndtr/goleveldb/leveldb/iterator"
"github.com/syndtr/goleveldb/leveldb/util"
)
// Common errors.
var (
ErrNotFound = errors.ErrNotFound
ErrIterReleased = errors.New("leveldb/memdb: iterator released")
)
const tMaxHeight = 12
type dbIter struct {
util.BasicReleaser
p *DB
slice *util.Range
node int
forward bool
key, value []byte
err error
}
func (i *dbIter) fill(checkStart, checkLimit bool) bool {
if i.node != 0 {
n := i.p.nodeData[i.node]
m := n + i.p.nodeData[i.node+nKey]
i.key = i.p.kvData[n:m]
if i.slice != nil {
switch {
case checkLimit && i.slice.Limit != nil && i.p.cmp.Compare(i.key, i.slice.Limit) >= 0:
fallthrough
case checkStart && i.slice.Start != nil && i.p.cmp.Compare(i.key, i.slice.Start) < 0:
i.node = 0
goto bail
}
}
i.value = i.p.kvData[m : m+i.p.nodeData[i.node+nVal]]
return true
}
bail:
i.key = nil
i.value = nil
return false
}
func (i *dbIter) Valid() bool {
return i.node != 0
}
func (i *dbIter) First() bool {
if i.Released() {
i.err = ErrIterReleased
return false
}
i.forward = true
i.p.mu.RLock()
defer i.p.mu.RUnlock()
if i.slice != nil && i.slice.Start != nil {
i.node, _ = i.p.findGE(i.slice.Start, false)
} else {
i.node = i.p.nodeData[nNext]
}
return i.fill(false, true)
}
func (i *dbIter) Last() bool {
if i.Released() {
i.err = ErrIterReleased
return false
}
i.forward = false
i.p.mu.RLock()
defer i.p.mu.RUnlock()
if i.slice != nil && i.slice.Limit != nil {
i.node = i.p.findLT(i.slice.Limit)
} else {
i.node = i.p.findLast()
}
return i.fill(true, false)
}
func (i *dbIter) Seek(key []byte) bool {
if i.Released() {
i.err = ErrIterReleased
return false
}
i.forward = true
i.p.mu.RLock()
defer i.p.mu.RUnlock()
if i.slice != nil && i.slice.Start != nil && i.p.cmp.Compare(key, i.slice.Start) < 0 {
key = i.slice.Start
}
i.node, _ = i.p.findGE(key, false)
return i.fill(false, true)
}
func (i *dbIter) Next() bool {
if i.Released() {
i.err = ErrIterReleased
return false
}
if i.node == 0 {
if !i.forward {
return i.First()
}
return false
}
i.forward = true
i.p.mu.RLock()
defer i.p.mu.RUnlock()
i.node = i.p.nodeData[i.node+nNext]
return i.fill(false, true)
}
func (i *dbIter) Prev() bool {
if i.Released() {
i.err = ErrIterReleased
return false
}
if i.node == 0 {
if i.forward {
return i.Last()
}
return false
}
i.forward = false
i.p.mu.RLock()
defer i.p.mu.RUnlock()
i.node = i.p.findLT(i.key)
return i.fill(true, false)
}
func (i *dbIter) Key() []byte {
return i.key
}
func (i *dbIter) Value() []byte {
return i.value
}
func (i *dbIter) Error() error { return i.err }
func (i *dbIter) Release() {
if !i.Released() {
i.p = nil
i.node = 0
i.key = nil
i.value = nil
i.BasicReleaser.Release()
}
}
const (
nKV = iota
nKey
nVal
nHeight
nNext
)
// DB is an in-memory key/value database.
type DB struct {
cmp comparer.BasicComparer
rnd *rand.Rand
mu sync.RWMutex
kvData []byte
// Node data:
// [0] : KV offset
// [1] : Key length
// [2] : Value length
// [3] : Height
// [3..height] : Next nodes
nodeData []int
prevNode [tMaxHeight]int
maxHeight int
n int
kvSize int
}
func (p *DB) randHeight() (h int) {
const branching = 4
h = 1
for h < tMaxHeight && p.rnd.Int()%branching == 0 {
h++
}
return
}
// Must hold RW-lock if prev == true, as it use shared prevNode slice.
func (p *DB) findGE(key []byte, prev bool) (int, bool) {
node := 0
h := p.maxHeight - 1
for {
next := p.nodeData[node+nNext+h]
cmp := 1
if next != 0 {
o := p.nodeData[next]
cmp = p.cmp.Compare(p.kvData[o:o+p.nodeData[next+nKey]], key)
}
if cmp < 0 {
// Keep searching in this list
node = next
} else {
if prev {
p.prevNode[h] = node
} else if cmp == 0 {
return next, true
}
if h == 0 {
return next, cmp == 0
}
h--
}
}
}
func (p *DB) findLT(key []byte) int {
node := 0
h := p.maxHeight - 1
for {
next := p.nodeData[node+nNext+h]
o := p.nodeData[next]
if next == 0 || p.cmp.Compare(p.kvData[o:o+p.nodeData[next+nKey]], key) >= 0 {
if h == 0 {
break
}
h--
} else {
node = next
}
}
return node
}
func (p *DB) findLast() int {
node := 0
h := p.maxHeight - 1
for {
next := p.nodeData[node+nNext+h]
if next == 0 {
if h == 0 {
break
}
h--
} else {
node = next
}
}
return node
}
// Put sets the value for the given key. It overwrites any previous value
// for that key; a DB is not a multi-map.
//
// It is safe to modify the contents of the arguments after Put returns.
func (p *DB) Put(key []byte, value []byte) error {
p.mu.Lock()
defer p.mu.Unlock()
if node, exact := p.findGE(key, true); exact {
kvOffset := len(p.kvData)
p.kvData = append(p.kvData, key...)
p.kvData = append(p.kvData, value...)
p.nodeData[node] = kvOffset
m := p.nodeData[node+nVal]
p.nodeData[node+nVal] = len(value)
p.kvSize += len(value) - m
return nil
}
h := p.randHeight()
if h > p.maxHeight {
for i := p.maxHeight; i < h; i++ {
p.prevNode[i] = 0
}
p.maxHeight = h
}
kvOffset := len(p.kvData)
p.kvData = append(p.kvData, key...)
p.kvData = append(p.kvData, value...)
// Node
node := len(p.nodeData)
p.nodeData = append(p.nodeData, kvOffset, len(key), len(value), h)
for i, n := range p.prevNode[:h] {
m := n + nNext + i
p.nodeData = append(p.nodeData, p.nodeData[m])
p.nodeData[m] = node
}
p.kvSize += len(key) + len(value)
p.n++
return nil
}
// Delete deletes the value for the given key. It returns ErrNotFound if
// the DB does not contain the key.
//
// It is safe to modify the contents of the arguments after Delete returns.
func (p *DB) Delete(key []byte) error {
p.mu.Lock()
defer p.mu.Unlock()
node, exact := p.findGE(key, true)
if !exact {
return ErrNotFound
}
h := p.nodeData[node+nHeight]
for i, n := range p.prevNode[:h] {
m := n + nNext + i
p.nodeData[m] = p.nodeData[p.nodeData[m]+nNext+i]
}
p.kvSize -= p.nodeData[node+nKey] + p.nodeData[node+nVal]
p.n--
return nil
}
// Contains returns true if the given key are in the DB.
//
// It is safe to modify the contents of the arguments after Contains returns.
func (p *DB) Contains(key []byte) bool {
p.mu.RLock()
_, exact := p.findGE(key, false)
p.mu.RUnlock()
return exact
}
// Get gets the value for the given key. It returns error.ErrNotFound if the
// DB does not contain the key.
//
// The caller should not modify the contents of the returned slice, but
// it is safe to modify the contents of the argument after Get returns.
func (p *DB) Get(key []byte) (value []byte, err error) {
p.mu.RLock()
if node, exact := p.findGE(key, false); exact {
o := p.nodeData[node] + p.nodeData[node+nKey]
value = p.kvData[o : o+p.nodeData[node+nVal]]
} else {
err = ErrNotFound
}
p.mu.RUnlock()
return
}
// Find finds key/value pair whose key is greater than or equal to the
// given key. It returns ErrNotFound if the table doesn't contain
// such pair.
//
// The caller should not modify the contents of the returned slice, but
// it is safe to modify the contents of the argument after Find returns.
func (p *DB) Find(key []byte) (rkey, value []byte, err error) {
p.mu.RLock()
if node, _ := p.findGE(key, false); node != 0 {
n := p.nodeData[node]
m := n + p.nodeData[node+nKey]
rkey = p.kvData[n:m]
value = p.kvData[m : m+p.nodeData[node+nVal]]
} else {
err = ErrNotFound
}
p.mu.RUnlock()
return
}
// NewIterator returns an iterator of the DB.
// The returned iterator is not safe for concurrent use, but it is safe to use
// multiple iterators concurrently, with each in a dedicated goroutine.
// It is also safe to use an iterator concurrently with modifying its
// underlying DB. However, the resultant key/value pairs are not guaranteed
// to be a consistent snapshot of the DB at a particular point in time.
//
// Slice allows slicing the iterator to only contains keys in the given
// range. A nil Range.Start is treated as a key before all keys in the
// DB. And a nil Range.Limit is treated as a key after all keys in
// the DB.
//
// WARNING: Any slice returned by interator (e.g. slice returned by calling
// Iterator.Key() or Iterator.Key() methods), its content should not be modified
// unless noted otherwise.
//
// The iterator must be released after use, by calling Release method.
//
// Also read Iterator documentation of the leveldb/iterator package.
func (p *DB) NewIterator(slice *util.Range) iterator.Iterator {
return &dbIter{p: p, slice: slice}
}
// Capacity returns keys/values buffer capacity.
func (p *DB) Capacity() int {
p.mu.RLock()
defer p.mu.RUnlock()
return cap(p.kvData)
}
// Size returns sum of keys and values length. Note that deleted
// key/value will not be accounted for, but it will still consume
// the buffer, since the buffer is append only.
func (p *DB) Size() int {
p.mu.RLock()
defer p.mu.RUnlock()
return p.kvSize
}
// Free returns keys/values free buffer before need to grow.
func (p *DB) Free() int {
p.mu.RLock()
defer p.mu.RUnlock()
return cap(p.kvData) - len(p.kvData)
}
// Len returns the number of entries in the DB.
func (p *DB) Len() int {
p.mu.RLock()
defer p.mu.RUnlock()
return p.n
}
// Reset resets the DB to initial empty state. Allows reuse the buffer.
func (p *DB) Reset() {
p.mu.Lock()
p.rnd = rand.New(rand.NewSource(0xdeadbeef))
p.maxHeight = 1
p.n = 0
p.kvSize = 0
p.kvData = p.kvData[:0]
p.nodeData = p.nodeData[:nNext+tMaxHeight]
p.nodeData[nKV] = 0
p.nodeData[nKey] = 0
p.nodeData[nVal] = 0
p.nodeData[nHeight] = tMaxHeight
for n := 0; n < tMaxHeight; n++ {
p.nodeData[nNext+n] = 0
p.prevNode[n] = 0
}
p.mu.Unlock()
}
// New creates a new initialized in-memory key/value DB. The capacity
// is the initial key/value buffer capacity. The capacity is advisory,
// not enforced.
//
// This DB is append-only, deleting an entry would remove entry node but not
// reclaim KV buffer.
//
// The returned DB instance is safe for concurrent use.
func New(cmp comparer.BasicComparer, capacity int) *DB {
p := &DB{
cmp: cmp,
rnd: rand.New(rand.NewSource(0xdeadbeef)),
maxHeight: 1,
kvData: make([]byte, 0, capacity),
nodeData: make([]int, 4+tMaxHeight),
}
p.nodeData[nHeight] = tMaxHeight
return p
}

697
vendor/github.com/syndtr/goleveldb/leveldb/opt/options.go generated vendored Normal file
View File

@ -0,0 +1,697 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Package opt provides sets of options used by LevelDB.
package opt
import (
"math"
"github.com/syndtr/goleveldb/leveldb/cache"
"github.com/syndtr/goleveldb/leveldb/comparer"
"github.com/syndtr/goleveldb/leveldb/filter"
)
const (
KiB = 1024
MiB = KiB * 1024
GiB = MiB * 1024
)
var (
DefaultBlockCacher = LRUCacher
DefaultBlockCacheCapacity = 8 * MiB
DefaultBlockRestartInterval = 16
DefaultBlockSize = 4 * KiB
DefaultCompactionExpandLimitFactor = 25
DefaultCompactionGPOverlapsFactor = 10
DefaultCompactionL0Trigger = 4
DefaultCompactionSourceLimitFactor = 1
DefaultCompactionTableSize = 2 * MiB
DefaultCompactionTableSizeMultiplier = 1.0
DefaultCompactionTotalSize = 10 * MiB
DefaultCompactionTotalSizeMultiplier = 10.0
DefaultCompressionType = SnappyCompression
DefaultIteratorSamplingRate = 1 * MiB
DefaultOpenFilesCacher = LRUCacher
DefaultOpenFilesCacheCapacity = 500
DefaultWriteBuffer = 4 * MiB
DefaultWriteL0PauseTrigger = 12
DefaultWriteL0SlowdownTrigger = 8
)
// Cacher is a caching algorithm.
type Cacher interface {
New(capacity int) cache.Cacher
}
type CacherFunc struct {
NewFunc func(capacity int) cache.Cacher
}
func (f *CacherFunc) New(capacity int) cache.Cacher {
if f.NewFunc != nil {
return f.NewFunc(capacity)
}
return nil
}
func noCacher(int) cache.Cacher { return nil }
var (
// LRUCacher is the LRU-cache algorithm.
LRUCacher = &CacherFunc{cache.NewLRU}
// NoCacher is the value to disable caching algorithm.
NoCacher = &CacherFunc{}
)
// Compression is the 'sorted table' block compression algorithm to use.
type Compression uint
func (c Compression) String() string {
switch c {
case DefaultCompression:
return "default"
case NoCompression:
return "none"
case SnappyCompression:
return "snappy"
}
return "invalid"
}
const (
DefaultCompression Compression = iota
NoCompression
SnappyCompression
nCompression
)
// Strict is the DB 'strict level'.
type Strict uint
const (
// If present then a corrupted or invalid chunk or block in manifest
// journal will cause an error instead of being dropped.
// This will prevent database with corrupted manifest to be opened.
StrictManifest Strict = 1 << iota
// If present then journal chunk checksum will be verified.
StrictJournalChecksum
// If present then a corrupted or invalid chunk or block in journal
// will cause an error instead of being dropped.
// This will prevent database with corrupted journal to be opened.
StrictJournal
// If present then 'sorted table' block checksum will be verified.
// This has effect on both 'read operation' and compaction.
StrictBlockChecksum
// If present then a corrupted 'sorted table' will fails compaction.
// The database will enter read-only mode.
StrictCompaction
// If present then a corrupted 'sorted table' will halts 'read operation'.
StrictReader
// If present then leveldb.Recover will drop corrupted 'sorted table'.
StrictRecovery
// This only applicable for ReadOptions, if present then this ReadOptions
// 'strict level' will override global ones.
StrictOverride
// StrictAll enables all strict flags.
StrictAll = StrictManifest | StrictJournalChecksum | StrictJournal | StrictBlockChecksum | StrictCompaction | StrictReader | StrictRecovery
// DefaultStrict is the default strict flags. Specify any strict flags
// will override default strict flags as whole (i.e. not OR'ed).
DefaultStrict = StrictJournalChecksum | StrictBlockChecksum | StrictCompaction | StrictReader
// NoStrict disables all strict flags. Override default strict flags.
NoStrict = ^StrictAll
)
// Options holds the optional parameters for the DB at large.
type Options struct {
// AltFilters defines one or more 'alternative filters'.
// 'alternative filters' will be used during reads if a filter block
// does not match with the 'effective filter'.
//
// The default value is nil
AltFilters []filter.Filter
// BlockCacher provides cache algorithm for LevelDB 'sorted table' block caching.
// Specify NoCacher to disable caching algorithm.
//
// The default value is LRUCacher.
BlockCacher Cacher
// BlockCacheCapacity defines the capacity of the 'sorted table' block caching.
// Use -1 for zero, this has same effect as specifying NoCacher to BlockCacher.
//
// The default value is 8MiB.
BlockCacheCapacity int
// BlockCacheEvictRemoved allows enable forced-eviction on cached block belonging
// to removed 'sorted table'.
//
// The default if false.
BlockCacheEvictRemoved bool
// BlockRestartInterval is the number of keys between restart points for
// delta encoding of keys.
//
// The default value is 16.
BlockRestartInterval int
// BlockSize is the minimum uncompressed size in bytes of each 'sorted table'
// block.
//
// The default value is 4KiB.
BlockSize int
// CompactionExpandLimitFactor limits compaction size after expanded.
// This will be multiplied by table size limit at compaction target level.
//
// The default value is 25.
CompactionExpandLimitFactor int
// CompactionGPOverlapsFactor limits overlaps in grandparent (Level + 2) that a
// single 'sorted table' generates.
// This will be multiplied by table size limit at grandparent level.
//
// The default value is 10.
CompactionGPOverlapsFactor int
// CompactionL0Trigger defines number of 'sorted table' at level-0 that will
// trigger compaction.
//
// The default value is 4.
CompactionL0Trigger int
// CompactionSourceLimitFactor limits compaction source size. This doesn't apply to
// level-0.
// This will be multiplied by table size limit at compaction target level.
//
// The default value is 1.
CompactionSourceLimitFactor int
// CompactionTableSize limits size of 'sorted table' that compaction generates.
// The limits for each level will be calculated as:
// CompactionTableSize * (CompactionTableSizeMultiplier ^ Level)
// The multiplier for each level can also fine-tuned using CompactionTableSizeMultiplierPerLevel.
//
// The default value is 2MiB.
CompactionTableSize int
// CompactionTableSizeMultiplier defines multiplier for CompactionTableSize.
//
// The default value is 1.
CompactionTableSizeMultiplier float64
// CompactionTableSizeMultiplierPerLevel defines per-level multiplier for
// CompactionTableSize.
// Use zero to skip a level.
//
// The default value is nil.
CompactionTableSizeMultiplierPerLevel []float64
// CompactionTotalSize limits total size of 'sorted table' for each level.
// The limits for each level will be calculated as:
// CompactionTotalSize * (CompactionTotalSizeMultiplier ^ Level)
// The multiplier for each level can also fine-tuned using
// CompactionTotalSizeMultiplierPerLevel.
//
// The default value is 10MiB.
CompactionTotalSize int
// CompactionTotalSizeMultiplier defines multiplier for CompactionTotalSize.
//
// The default value is 10.
CompactionTotalSizeMultiplier float64
// CompactionTotalSizeMultiplierPerLevel defines per-level multiplier for
// CompactionTotalSize.
// Use zero to skip a level.
//
// The default value is nil.
CompactionTotalSizeMultiplierPerLevel []float64
// Comparer defines a total ordering over the space of []byte keys: a 'less
// than' relationship. The same comparison algorithm must be used for reads
// and writes over the lifetime of the DB.
//
// The default value uses the same ordering as bytes.Compare.
Comparer comparer.Comparer
// Compression defines the 'sorted table' block compression to use.
//
// The default value (DefaultCompression) uses snappy compression.
Compression Compression
// DisableBufferPool allows disable use of util.BufferPool functionality.
//
// The default value is false.
DisableBufferPool bool
// DisableBlockCache allows disable use of cache.Cache functionality on
// 'sorted table' block.
//
// The default value is false.
DisableBlockCache bool
// DisableCompactionBackoff allows disable compaction retry backoff.
//
// The default value is false.
DisableCompactionBackoff bool
// DisableLargeBatchTransaction allows disabling switch-to-transaction mode
// on large batch write. If enable batch writes large than WriteBuffer will
// use transaction.
//
// The default is false.
DisableLargeBatchTransaction bool
// ErrorIfExist defines whether an error should returned if the DB already
// exist.
//
// The default value is false.
ErrorIfExist bool
// ErrorIfMissing defines whether an error should returned if the DB is
// missing. If false then the database will be created if missing, otherwise
// an error will be returned.
//
// The default value is false.
ErrorIfMissing bool
// Filter defines an 'effective filter' to use. An 'effective filter'
// if defined will be used to generate per-table filter block.
// The filter name will be stored on disk.
// During reads LevelDB will try to find matching filter from
// 'effective filter' and 'alternative filters'.
//
// Filter can be changed after a DB has been created. It is recommended
// to put old filter to the 'alternative filters' to mitigate lack of
// filter during transition period.
//
// A filter is used to reduce disk reads when looking for a specific key.
//
// The default value is nil.
Filter filter.Filter
// IteratorSamplingRate defines approximate gap (in bytes) between read
// sampling of an iterator. The samples will be used to determine when
// compaction should be triggered.
//
// The default is 1MiB.
IteratorSamplingRate int
// NoSync allows completely disable fsync.
//
// The default is false.
NoSync bool
// NoWriteMerge allows disabling write merge.
//
// The default is false.
NoWriteMerge bool
// OpenFilesCacher provides cache algorithm for open files caching.
// Specify NoCacher to disable caching algorithm.
//
// The default value is LRUCacher.
OpenFilesCacher Cacher
// OpenFilesCacheCapacity defines the capacity of the open files caching.
// Use -1 for zero, this has same effect as specifying NoCacher to OpenFilesCacher.
//
// The default value is 500.
OpenFilesCacheCapacity int
// If true then opens DB in read-only mode.
//
// The default value is false.
ReadOnly bool
// Strict defines the DB strict level.
Strict Strict
// WriteBuffer defines maximum size of a 'memdb' before flushed to
// 'sorted table'. 'memdb' is an in-memory DB backed by an on-disk
// unsorted journal.
//
// LevelDB may held up to two 'memdb' at the same time.
//
// The default value is 4MiB.
WriteBuffer int
// WriteL0StopTrigger defines number of 'sorted table' at level-0 that will
// pause write.
//
// The default value is 12.
WriteL0PauseTrigger int
// WriteL0SlowdownTrigger defines number of 'sorted table' at level-0 that
// will trigger write slowdown.
//
// The default value is 8.
WriteL0SlowdownTrigger int
}
func (o *Options) GetAltFilters() []filter.Filter {
if o == nil {
return nil
}
return o.AltFilters
}
func (o *Options) GetBlockCacher() Cacher {
if o == nil || o.BlockCacher == nil {
return DefaultBlockCacher
} else if o.BlockCacher == NoCacher {
return nil
}
return o.BlockCacher
}
func (o *Options) GetBlockCacheCapacity() int {
if o == nil || o.BlockCacheCapacity == 0 {
return DefaultBlockCacheCapacity
} else if o.BlockCacheCapacity < 0 {
return 0
}
return o.BlockCacheCapacity
}
func (o *Options) GetBlockCacheEvictRemoved() bool {
if o == nil {
return false
}
return o.BlockCacheEvictRemoved
}
func (o *Options) GetBlockRestartInterval() int {
if o == nil || o.BlockRestartInterval <= 0 {
return DefaultBlockRestartInterval
}
return o.BlockRestartInterval
}
func (o *Options) GetBlockSize() int {
if o == nil || o.BlockSize <= 0 {
return DefaultBlockSize
}
return o.BlockSize
}
func (o *Options) GetCompactionExpandLimit(level int) int {
factor := DefaultCompactionExpandLimitFactor
if o != nil && o.CompactionExpandLimitFactor > 0 {
factor = o.CompactionExpandLimitFactor
}
return o.GetCompactionTableSize(level+1) * factor
}
func (o *Options) GetCompactionGPOverlaps(level int) int {
factor := DefaultCompactionGPOverlapsFactor
if o != nil && o.CompactionGPOverlapsFactor > 0 {
factor = o.CompactionGPOverlapsFactor
}
return o.GetCompactionTableSize(level+2) * factor
}
func (o *Options) GetCompactionL0Trigger() int {
if o == nil || o.CompactionL0Trigger == 0 {
return DefaultCompactionL0Trigger
}
return o.CompactionL0Trigger
}
func (o *Options) GetCompactionSourceLimit(level int) int {
factor := DefaultCompactionSourceLimitFactor
if o != nil && o.CompactionSourceLimitFactor > 0 {
factor = o.CompactionSourceLimitFactor
}
return o.GetCompactionTableSize(level+1) * factor
}
func (o *Options) GetCompactionTableSize(level int) int {
var (
base = DefaultCompactionTableSize
mult float64
)
if o != nil {
if o.CompactionTableSize > 0 {
base = o.CompactionTableSize
}
if level < len(o.CompactionTableSizeMultiplierPerLevel) && o.CompactionTableSizeMultiplierPerLevel[level] > 0 {
mult = o.CompactionTableSizeMultiplierPerLevel[level]
} else if o.CompactionTableSizeMultiplier > 0 {
mult = math.Pow(o.CompactionTableSizeMultiplier, float64(level))
}
}
if mult == 0 {
mult = math.Pow(DefaultCompactionTableSizeMultiplier, float64(level))
}
return int(float64(base) * mult)
}
func (o *Options) GetCompactionTotalSize(level int) int64 {
var (
base = DefaultCompactionTotalSize
mult float64
)
if o != nil {
if o.CompactionTotalSize > 0 {
base = o.CompactionTotalSize
}
if level < len(o.CompactionTotalSizeMultiplierPerLevel) && o.CompactionTotalSizeMultiplierPerLevel[level] > 0 {
mult = o.CompactionTotalSizeMultiplierPerLevel[level]
} else if o.CompactionTotalSizeMultiplier > 0 {
mult = math.Pow(o.CompactionTotalSizeMultiplier, float64(level))
}
}
if mult == 0 {
mult = math.Pow(DefaultCompactionTotalSizeMultiplier, float64(level))
}
return int64(float64(base) * mult)
}
func (o *Options) GetComparer() comparer.Comparer {
if o == nil || o.Comparer == nil {
return comparer.DefaultComparer
}
return o.Comparer
}
func (o *Options) GetCompression() Compression {
if o == nil || o.Compression <= DefaultCompression || o.Compression >= nCompression {
return DefaultCompressionType
}
return o.Compression
}
func (o *Options) GetDisableBufferPool() bool {
if o == nil {
return false
}
return o.DisableBufferPool
}
func (o *Options) GetDisableBlockCache() bool {
if o == nil {
return false
}
return o.DisableBlockCache
}
func (o *Options) GetDisableCompactionBackoff() bool {
if o == nil {
return false
}
return o.DisableCompactionBackoff
}
func (o *Options) GetDisableLargeBatchTransaction() bool {
if o == nil {
return false
}
return o.DisableLargeBatchTransaction
}
func (o *Options) GetErrorIfExist() bool {
if o == nil {
return false
}
return o.ErrorIfExist
}
func (o *Options) GetErrorIfMissing() bool {
if o == nil {
return false
}
return o.ErrorIfMissing
}
func (o *Options) GetFilter() filter.Filter {
if o == nil {
return nil
}
return o.Filter
}
func (o *Options) GetIteratorSamplingRate() int {
if o == nil || o.IteratorSamplingRate <= 0 {
return DefaultIteratorSamplingRate
}
return o.IteratorSamplingRate
}
func (o *Options) GetNoSync() bool {
if o == nil {
return false
}
return o.NoSync
}
func (o *Options) GetNoWriteMerge() bool {
if o == nil {
return false
}
return o.NoWriteMerge
}
func (o *Options) GetOpenFilesCacher() Cacher {
if o == nil || o.OpenFilesCacher == nil {
return DefaultOpenFilesCacher
}
if o.OpenFilesCacher == NoCacher {
return nil
}
return o.OpenFilesCacher
}
func (o *Options) GetOpenFilesCacheCapacity() int {
if o == nil || o.OpenFilesCacheCapacity == 0 {
return DefaultOpenFilesCacheCapacity
} else if o.OpenFilesCacheCapacity < 0 {
return 0
}
return o.OpenFilesCacheCapacity
}
func (o *Options) GetReadOnly() bool {
if o == nil {
return false
}
return o.ReadOnly
}
func (o *Options) GetStrict(strict Strict) bool {
if o == nil || o.Strict == 0 {
return DefaultStrict&strict != 0
}
return o.Strict&strict != 0
}
func (o *Options) GetWriteBuffer() int {
if o == nil || o.WriteBuffer <= 0 {
return DefaultWriteBuffer
}
return o.WriteBuffer
}
func (o *Options) GetWriteL0PauseTrigger() int {
if o == nil || o.WriteL0PauseTrigger == 0 {
return DefaultWriteL0PauseTrigger
}
return o.WriteL0PauseTrigger
}
func (o *Options) GetWriteL0SlowdownTrigger() int {
if o == nil || o.WriteL0SlowdownTrigger == 0 {
return DefaultWriteL0SlowdownTrigger
}
return o.WriteL0SlowdownTrigger
}
// ReadOptions holds the optional parameters for 'read operation'. The
// 'read operation' includes Get, Find and NewIterator.
type ReadOptions struct {
// DontFillCache defines whether block reads for this 'read operation'
// should be cached. If false then the block will be cached. This does
// not affects already cached block.
//
// The default value is false.
DontFillCache bool
// Strict will be OR'ed with global DB 'strict level' unless StrictOverride
// is present. Currently only StrictReader that has effect here.
Strict Strict
}
func (ro *ReadOptions) GetDontFillCache() bool {
if ro == nil {
return false
}
return ro.DontFillCache
}
func (ro *ReadOptions) GetStrict(strict Strict) bool {
if ro == nil {
return false
}
return ro.Strict&strict != 0
}
// WriteOptions holds the optional parameters for 'write operation'. The
// 'write operation' includes Write, Put and Delete.
type WriteOptions struct {
// NoWriteMerge allows disabling write merge.
//
// The default is false.
NoWriteMerge bool
// Sync is whether to sync underlying writes from the OS buffer cache
// through to actual disk, if applicable. Setting Sync can result in
// slower writes.
//
// If false, and the machine crashes, then some recent writes may be lost.
// Note that if it is just the process that crashes (and the machine does
// not) then no writes will be lost.
//
// In other words, Sync being false has the same semantics as a write
// system call. Sync being true means write followed by fsync.
//
// The default value is false.
Sync bool
}
func (wo *WriteOptions) GetNoWriteMerge() bool {
if wo == nil {
return false
}
return wo.NoWriteMerge
}
func (wo *WriteOptions) GetSync() bool {
if wo == nil {
return false
}
return wo.Sync
}
func GetStrict(o *Options, ro *ReadOptions, strict Strict) bool {
if ro.GetStrict(StrictOverride) {
return ro.GetStrict(strict)
} else {
return o.GetStrict(strict) || ro.GetStrict(strict)
}
}

107
vendor/github.com/syndtr/goleveldb/leveldb/options.go generated vendored Normal file
View File

@ -0,0 +1,107 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package leveldb
import (
"github.com/syndtr/goleveldb/leveldb/filter"
"github.com/syndtr/goleveldb/leveldb/opt"
)
func dupOptions(o *opt.Options) *opt.Options {
newo := &opt.Options{}
if o != nil {
*newo = *o
}
if newo.Strict == 0 {
newo.Strict = opt.DefaultStrict
}
return newo
}
func (s *session) setOptions(o *opt.Options) {
no := dupOptions(o)
// Alternative filters.
if filters := o.GetAltFilters(); len(filters) > 0 {
no.AltFilters = make([]filter.Filter, len(filters))
for i, filter := range filters {
no.AltFilters[i] = &iFilter{filter}
}
}
// Comparer.
s.icmp = &iComparer{o.GetComparer()}
no.Comparer = s.icmp
// Filter.
if filter := o.GetFilter(); filter != nil {
no.Filter = &iFilter{filter}
}
s.o = &cachedOptions{Options: no}
s.o.cache()
}
const optCachedLevel = 7
type cachedOptions struct {
*opt.Options
compactionExpandLimit []int
compactionGPOverlaps []int
compactionSourceLimit []int
compactionTableSize []int
compactionTotalSize []int64
}
func (co *cachedOptions) cache() {
co.compactionExpandLimit = make([]int, optCachedLevel)
co.compactionGPOverlaps = make([]int, optCachedLevel)
co.compactionSourceLimit = make([]int, optCachedLevel)
co.compactionTableSize = make([]int, optCachedLevel)
co.compactionTotalSize = make([]int64, optCachedLevel)
for level := 0; level < optCachedLevel; level++ {
co.compactionExpandLimit[level] = co.Options.GetCompactionExpandLimit(level)
co.compactionGPOverlaps[level] = co.Options.GetCompactionGPOverlaps(level)
co.compactionSourceLimit[level] = co.Options.GetCompactionSourceLimit(level)
co.compactionTableSize[level] = co.Options.GetCompactionTableSize(level)
co.compactionTotalSize[level] = co.Options.GetCompactionTotalSize(level)
}
}
func (co *cachedOptions) GetCompactionExpandLimit(level int) int {
if level < optCachedLevel {
return co.compactionExpandLimit[level]
}
return co.Options.GetCompactionExpandLimit(level)
}
func (co *cachedOptions) GetCompactionGPOverlaps(level int) int {
if level < optCachedLevel {
return co.compactionGPOverlaps[level]
}
return co.Options.GetCompactionGPOverlaps(level)
}
func (co *cachedOptions) GetCompactionSourceLimit(level int) int {
if level < optCachedLevel {
return co.compactionSourceLimit[level]
}
return co.Options.GetCompactionSourceLimit(level)
}
func (co *cachedOptions) GetCompactionTableSize(level int) int {
if level < optCachedLevel {
return co.compactionTableSize[level]
}
return co.Options.GetCompactionTableSize(level)
}
func (co *cachedOptions) GetCompactionTotalSize(level int) int64 {
if level < optCachedLevel {
return co.compactionTotalSize[level]
}
return co.Options.GetCompactionTotalSize(level)
}

210
vendor/github.com/syndtr/goleveldb/leveldb/session.go generated vendored Normal file
View File

@ -0,0 +1,210 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package leveldb
import (
"fmt"
"io"
"os"
"sync"
"github.com/syndtr/goleveldb/leveldb/errors"
"github.com/syndtr/goleveldb/leveldb/journal"
"github.com/syndtr/goleveldb/leveldb/opt"
"github.com/syndtr/goleveldb/leveldb/storage"
)
// ErrManifestCorrupted records manifest corruption. This error will be
// wrapped with errors.ErrCorrupted.
type ErrManifestCorrupted struct {
Field string
Reason string
}
func (e *ErrManifestCorrupted) Error() string {
return fmt.Sprintf("leveldb: manifest corrupted (field '%s'): %s", e.Field, e.Reason)
}
func newErrManifestCorrupted(fd storage.FileDesc, field, reason string) error {
return errors.NewErrCorrupted(fd, &ErrManifestCorrupted{field, reason})
}
// session represent a persistent database session.
type session struct {
// Need 64-bit alignment.
stNextFileNum int64 // current unused file number
stJournalNum int64 // current journal file number; need external synchronization
stPrevJournalNum int64 // prev journal file number; no longer used; for compatibility with older version of leveldb
stTempFileNum int64
stSeqNum uint64 // last mem compacted seq; need external synchronization
stor *iStorage
storLock storage.Locker
o *cachedOptions
icmp *iComparer
tops *tOps
fileRef map[int64]int
manifest *journal.Writer
manifestWriter storage.Writer
manifestFd storage.FileDesc
stCompPtrs []internalKey // compaction pointers; need external synchronization
stVersion *version // current version
vmu sync.Mutex
}
// Creates new initialized session instance.
func newSession(stor storage.Storage, o *opt.Options) (s *session, err error) {
if stor == nil {
return nil, os.ErrInvalid
}
storLock, err := stor.Lock()
if err != nil {
return
}
s = &session{
stor: newIStorage(stor),
storLock: storLock,
fileRef: make(map[int64]int),
}
s.setOptions(o)
s.tops = newTableOps(s)
s.setVersion(newVersion(s))
s.log("log@legend F·NumFile S·FileSize N·Entry C·BadEntry B·BadBlock Ke·KeyError D·DroppedEntry L·Level Q·SeqNum T·TimeElapsed")
return
}
// Close session.
func (s *session) close() {
s.tops.close()
if s.manifest != nil {
s.manifest.Close()
}
if s.manifestWriter != nil {
s.manifestWriter.Close()
}
s.manifest = nil
s.manifestWriter = nil
s.setVersion(&version{s: s, closing: true})
}
// Release session lock.
func (s *session) release() {
s.storLock.Unlock()
}
// Create a new database session; need external synchronization.
func (s *session) create() error {
// create manifest
return s.newManifest(nil, nil)
}
// Recover a database session; need external synchronization.
func (s *session) recover() (err error) {
defer func() {
if os.IsNotExist(err) {
// Don't return os.ErrNotExist if the underlying storage contains
// other files that belong to LevelDB. So the DB won't get trashed.
if fds, _ := s.stor.List(storage.TypeAll); len(fds) > 0 {
err = &errors.ErrCorrupted{Fd: storage.FileDesc{Type: storage.TypeManifest}, Err: &errors.ErrMissingFiles{}}
}
}
}()
fd, err := s.stor.GetMeta()
if err != nil {
return
}
reader, err := s.stor.Open(fd)
if err != nil {
return
}
defer reader.Close()
var (
// Options.
strict = s.o.GetStrict(opt.StrictManifest)
jr = journal.NewReader(reader, dropper{s, fd}, strict, true)
rec = &sessionRecord{}
staging = s.stVersion.newStaging()
)
for {
var r io.Reader
r, err = jr.Next()
if err != nil {
if err == io.EOF {
err = nil
break
}
return errors.SetFd(err, fd)
}
err = rec.decode(r)
if err == nil {
// save compact pointers
for _, r := range rec.compPtrs {
s.setCompPtr(r.level, internalKey(r.ikey))
}
// commit record to version staging
staging.commit(rec)
} else {
err = errors.SetFd(err, fd)
if strict || !errors.IsCorrupted(err) {
return
}
s.logf("manifest error: %v (skipped)", errors.SetFd(err, fd))
}
rec.resetCompPtrs()
rec.resetAddedTables()
rec.resetDeletedTables()
}
switch {
case !rec.has(recComparer):
return newErrManifestCorrupted(fd, "comparer", "missing")
case rec.comparer != s.icmp.uName():
return newErrManifestCorrupted(fd, "comparer", fmt.Sprintf("mismatch: want '%s', got '%s'", s.icmp.uName(), rec.comparer))
case !rec.has(recNextFileNum):
return newErrManifestCorrupted(fd, "next-file-num", "missing")
case !rec.has(recJournalNum):
return newErrManifestCorrupted(fd, "journal-file-num", "missing")
case !rec.has(recSeqNum):
return newErrManifestCorrupted(fd, "seq-num", "missing")
}
s.manifestFd = fd
s.setVersion(staging.finish())
s.setNextFileNum(rec.nextFileNum)
s.recordCommited(rec)
return nil
}
// Commit session; need external synchronization.
func (s *session) commit(r *sessionRecord) (err error) {
v := s.version()
defer v.release()
// spawn new version based on current version
nv := v.spawn(r)
if s.manifest == nil {
// manifest journal writer not yet created, create one
err = s.newManifest(r, nv)
} else {
err = s.flushManifest(r)
}
// finally, apply new version if no error rise
if err == nil {
s.setVersion(nv)
}
return
}

302
vendor/github.com/syndtr/goleveldb/leveldb/session_compaction.go generated vendored Normal file
View File

@ -0,0 +1,302 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package leveldb
import (
"sync/atomic"
"github.com/syndtr/goleveldb/leveldb/iterator"
"github.com/syndtr/goleveldb/leveldb/memdb"
"github.com/syndtr/goleveldb/leveldb/opt"
)
func (s *session) pickMemdbLevel(umin, umax []byte, maxLevel int) int {
v := s.version()
defer v.release()
return v.pickMemdbLevel(umin, umax, maxLevel)
}
func (s *session) flushMemdb(rec *sessionRecord, mdb *memdb.DB, maxLevel int) (int, error) {
// Create sorted table.
iter := mdb.NewIterator(nil)
defer iter.Release()
t, n, err := s.tops.createFrom(iter)
if err != nil {
return 0, err
}
// Pick level other than zero can cause compaction issue with large
// bulk insert and delete on strictly incrementing key-space. The
// problem is that the small deletion markers trapped at lower level,
// while key/value entries keep growing at higher level. Since the
// key-space is strictly incrementing it will not overlaps with
// higher level, thus maximum possible level is always picked, while
// overlapping deletion marker pushed into lower level.
// See: https://github.com/syndtr/goleveldb/issues/127.
flushLevel := s.pickMemdbLevel(t.imin.ukey(), t.imax.ukey(), maxLevel)
rec.addTableFile(flushLevel, t)
s.logf("memdb@flush created L%d@%d N·%d S·%s %q:%q", flushLevel, t.fd.Num, n, shortenb(int(t.size)), t.imin, t.imax)
return flushLevel, nil
}
// Pick a compaction based on current state; need external synchronization.
func (s *session) pickCompaction() *compaction {
v := s.version()
var sourceLevel int
var t0 tFiles
if v.cScore >= 1 {
sourceLevel = v.cLevel
cptr := s.getCompPtr(sourceLevel)
tables := v.levels[sourceLevel]
for _, t := range tables {
if cptr == nil || s.icmp.Compare(t.imax, cptr) > 0 {
t0 = append(t0, t)
break
}
}
if len(t0) == 0 {
t0 = append(t0, tables[0])
}
} else {
if p := atomic.LoadPointer(&v.cSeek); p != nil {
ts := (*tSet)(p)
sourceLevel = ts.level
t0 = append(t0, ts.table)
} else {
v.release()
return nil
}
}
return newCompaction(s, v, sourceLevel, t0)
}
// Create compaction from given level and range; need external synchronization.
func (s *session) getCompactionRange(sourceLevel int, umin, umax []byte, noLimit bool) *compaction {
v := s.version()
if sourceLevel >= len(v.levels) {
v.release()
return nil
}
t0 := v.levels[sourceLevel].getOverlaps(nil, s.icmp, umin, umax, sourceLevel == 0)
if len(t0) == 0 {
v.release()
return nil
}
// Avoid compacting too much in one shot in case the range is large.
// But we cannot do this for level-0 since level-0 files can overlap
// and we must not pick one file and drop another older file if the
// two files overlap.
if !noLimit && sourceLevel > 0 {
limit := int64(v.s.o.GetCompactionSourceLimit(sourceLevel))
total := int64(0)
for i, t := range t0 {
total += t.size
if total >= limit {
s.logf("table@compaction limiting F·%d -> F·%d", len(t0), i+1)
t0 = t0[:i+1]
break
}
}
}
return newCompaction(s, v, sourceLevel, t0)
}
func newCompaction(s *session, v *version, sourceLevel int, t0 tFiles) *compaction {
c := &compaction{
s: s,
v: v,
sourceLevel: sourceLevel,
levels: [2]tFiles{t0, nil},
maxGPOverlaps: int64(s.o.GetCompactionGPOverlaps(sourceLevel)),
tPtrs: make([]int, len(v.levels)),
}
c.expand()
c.save()
return c
}
// compaction represent a compaction state.
type compaction struct {
s *session
v *version
sourceLevel int
levels [2]tFiles
maxGPOverlaps int64
gp tFiles
gpi int
seenKey bool
gpOverlappedBytes int64
imin, imax internalKey
tPtrs []int
released bool
snapGPI int
snapSeenKey bool
snapGPOverlappedBytes int64
snapTPtrs []int
}
func (c *compaction) save() {
c.snapGPI = c.gpi
c.snapSeenKey = c.seenKey
c.snapGPOverlappedBytes = c.gpOverlappedBytes
c.snapTPtrs = append(c.snapTPtrs[:0], c.tPtrs...)
}
func (c *compaction) restore() {
c.gpi = c.snapGPI
c.seenKey = c.snapSeenKey
c.gpOverlappedBytes = c.snapGPOverlappedBytes
c.tPtrs = append(c.tPtrs[:0], c.snapTPtrs...)
}
func (c *compaction) release() {
if !c.released {
c.released = true
c.v.release()
}
}
// Expand compacted tables; need external synchronization.
func (c *compaction) expand() {
limit := int64(c.s.o.GetCompactionExpandLimit(c.sourceLevel))
vt0 := c.v.levels[c.sourceLevel]
vt1 := tFiles{}
if level := c.sourceLevel + 1; level < len(c.v.levels) {
vt1 = c.v.levels[level]
}
t0, t1 := c.levels[0], c.levels[1]
imin, imax := t0.getRange(c.s.icmp)
// We expand t0 here just incase ukey hop across tables.
t0 = vt0.getOverlaps(t0, c.s.icmp, imin.ukey(), imax.ukey(), c.sourceLevel == 0)
if len(t0) != len(c.levels[0]) {
imin, imax = t0.getRange(c.s.icmp)
}
t1 = vt1.getOverlaps(t1, c.s.icmp, imin.ukey(), imax.ukey(), false)
// Get entire range covered by compaction.
amin, amax := append(t0, t1...).getRange(c.s.icmp)
// See if we can grow the number of inputs in "sourceLevel" without
// changing the number of "sourceLevel+1" files we pick up.
if len(t1) > 0 {
exp0 := vt0.getOverlaps(nil, c.s.icmp, amin.ukey(), amax.ukey(), c.sourceLevel == 0)
if len(exp0) > len(t0) && t1.size()+exp0.size() < limit {
xmin, xmax := exp0.getRange(c.s.icmp)
exp1 := vt1.getOverlaps(nil, c.s.icmp, xmin.ukey(), xmax.ukey(), false)
if len(exp1) == len(t1) {
c.s.logf("table@compaction expanding L%d+L%d (F·%d S·%s)+(F·%d S·%s) -> (F·%d S·%s)+(F·%d S·%s)",
c.sourceLevel, c.sourceLevel+1, len(t0), shortenb(int(t0.size())), len(t1), shortenb(int(t1.size())),
len(exp0), shortenb(int(exp0.size())), len(exp1), shortenb(int(exp1.size())))
imin, imax = xmin, xmax
t0, t1 = exp0, exp1
amin, amax = append(t0, t1...).getRange(c.s.icmp)
}
}
}
// Compute the set of grandparent files that overlap this compaction
// (parent == sourceLevel+1; grandparent == sourceLevel+2)
if level := c.sourceLevel + 2; level < len(c.v.levels) {
c.gp = c.v.levels[level].getOverlaps(c.gp, c.s.icmp, amin.ukey(), amax.ukey(), false)
}
c.levels[0], c.levels[1] = t0, t1
c.imin, c.imax = imin, imax
}
// Check whether compaction is trivial.
func (c *compaction) trivial() bool {
return len(c.levels[0]) == 1 && len(c.levels[1]) == 0 && c.gp.size() <= c.maxGPOverlaps
}
func (c *compaction) baseLevelForKey(ukey []byte) bool {
for level := c.sourceLevel + 2; level < len(c.v.levels); level++ {
tables := c.v.levels[level]
for c.tPtrs[level] < len(tables) {
t := tables[c.tPtrs[level]]
if c.s.icmp.uCompare(ukey, t.imax.ukey()) <= 0 {
// We've advanced far enough.
if c.s.icmp.uCompare(ukey, t.imin.ukey()) >= 0 {
// Key falls in this file's range, so definitely not base level.
return false
}
break
}
c.tPtrs[level]++
}
}
return true
}
func (c *compaction) shouldStopBefore(ikey internalKey) bool {
for ; c.gpi < len(c.gp); c.gpi++ {
gp := c.gp[c.gpi]
if c.s.icmp.Compare(ikey, gp.imax) <= 0 {
break
}
if c.seenKey {
c.gpOverlappedBytes += gp.size
}
}
c.seenKey = true
if c.gpOverlappedBytes > c.maxGPOverlaps {
// Too much overlap for current output; start new output.
c.gpOverlappedBytes = 0
return true
}
return false
}
// Creates an iterator.
func (c *compaction) newIterator() iterator.Iterator {
// Creates iterator slice.
icap := len(c.levels)
if c.sourceLevel == 0 {
// Special case for level-0.
icap = len(c.levels[0]) + 1
}
its := make([]iterator.Iterator, 0, icap)
// Options.
ro := &opt.ReadOptions{
DontFillCache: true,
Strict: opt.StrictOverride,
}
strict := c.s.o.GetStrict(opt.StrictCompaction)
if strict {
ro.Strict |= opt.StrictReader
}
for i, tables := range c.levels {
if len(tables) == 0 {
continue
}
// Level-0 is not sorted and may overlaps each other.
if c.sourceLevel+i == 0 {
for _, t := range tables {
its = append(its, c.s.tops.newIterator(t, nil, ro))
}
} else {
it := iterator.NewIndexedIterator(tables.newIndexIterator(c.s.tops, c.s.icmp, nil, ro), strict)
its = append(its, it)
}
}
return iterator.NewMergedIterator(its, c.s.icmp, strict)
}

323
vendor/github.com/syndtr/goleveldb/leveldb/session_record.go generated vendored Normal file
View File

@ -0,0 +1,323 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package leveldb
import (
"bufio"
"encoding/binary"
"io"
"strings"
"github.com/syndtr/goleveldb/leveldb/errors"
"github.com/syndtr/goleveldb/leveldb/storage"
)
type byteReader interface {
io.Reader
io.ByteReader
}
// These numbers are written to disk and should not be changed.
const (
recComparer = 1
recJournalNum = 2
recNextFileNum = 3
recSeqNum = 4
recCompPtr = 5
recDelTable = 6
recAddTable = 7
// 8 was used for large value refs
recPrevJournalNum = 9
)
type cpRecord struct {
level int
ikey internalKey
}
type atRecord struct {
level int
num int64
size int64
imin internalKey
imax internalKey
}
type dtRecord struct {
level int
num int64
}
type sessionRecord struct {
hasRec int
comparer string
journalNum int64
prevJournalNum int64
nextFileNum int64
seqNum uint64
compPtrs []cpRecord
addedTables []atRecord
deletedTables []dtRecord
scratch [binary.MaxVarintLen64]byte
err error
}
func (p *sessionRecord) has(rec int) bool {
return p.hasRec&(1<<uint(rec)) != 0
}
func (p *sessionRecord) setComparer(name string) {
p.hasRec |= 1 << recComparer
p.comparer = name
}
func (p *sessionRecord) setJournalNum(num int64) {
p.hasRec |= 1 << recJournalNum
p.journalNum = num
}
func (p *sessionRecord) setPrevJournalNum(num int64) {
p.hasRec |= 1 << recPrevJournalNum
p.prevJournalNum = num
}
func (p *sessionRecord) setNextFileNum(num int64) {
p.hasRec |= 1 << recNextFileNum
p.nextFileNum = num
}
func (p *sessionRecord) setSeqNum(num uint64) {
p.hasRec |= 1 << recSeqNum
p.seqNum = num
}
func (p *sessionRecord) addCompPtr(level int, ikey internalKey) {
p.hasRec |= 1 << recCompPtr
p.compPtrs = append(p.compPtrs, cpRecord{level, ikey})
}
func (p *sessionRecord) resetCompPtrs() {
p.hasRec &= ^(1 << recCompPtr)
p.compPtrs = p.compPtrs[:0]
}
func (p *sessionRecord) addTable(level int, num, size int64, imin, imax internalKey) {
p.hasRec |= 1 << recAddTable
p.addedTables = append(p.addedTables, atRecord{level, num, size, imin, imax})
}
func (p *sessionRecord) addTableFile(level int, t *tFile) {
p.addTable(level, t.fd.Num, t.size, t.imin, t.imax)
}
func (p *sessionRecord) resetAddedTables() {
p.hasRec &= ^(1 << recAddTable)
p.addedTables = p.addedTables[:0]
}
func (p *sessionRecord) delTable(level int, num int64) {
p.hasRec |= 1 << recDelTable
p.deletedTables = append(p.deletedTables, dtRecord{level, num})
}
func (p *sessionRecord) resetDeletedTables() {
p.hasRec &= ^(1 << recDelTable)
p.deletedTables = p.deletedTables[:0]
}
func (p *sessionRecord) putUvarint(w io.Writer, x uint64) {
if p.err != nil {
return
}
n := binary.PutUvarint(p.scratch[:], x)
_, p.err = w.Write(p.scratch[:n])
}
func (p *sessionRecord) putVarint(w io.Writer, x int64) {
if x < 0 {
panic("invalid negative value")
}
p.putUvarint(w, uint64(x))
}
func (p *sessionRecord) putBytes(w io.Writer, x []byte) {
if p.err != nil {
return
}
p.putUvarint(w, uint64(len(x)))
if p.err != nil {
return
}
_, p.err = w.Write(x)
}
func (p *sessionRecord) encode(w io.Writer) error {
p.err = nil
if p.has(recComparer) {
p.putUvarint(w, recComparer)
p.putBytes(w, []byte(p.comparer))
}
if p.has(recJournalNum) {
p.putUvarint(w, recJournalNum)
p.putVarint(w, p.journalNum)
}
if p.has(recNextFileNum) {
p.putUvarint(w, recNextFileNum)
p.putVarint(w, p.nextFileNum)
}
if p.has(recSeqNum) {
p.putUvarint(w, recSeqNum)
p.putUvarint(w, p.seqNum)
}
for _, r := range p.compPtrs {
p.putUvarint(w, recCompPtr)
p.putUvarint(w, uint64(r.level))
p.putBytes(w, r.ikey)
}
for _, r := range p.deletedTables {
p.putUvarint(w, recDelTable)
p.putUvarint(w, uint64(r.level))
p.putVarint(w, r.num)
}
for _, r := range p.addedTables {
p.putUvarint(w, recAddTable)
p.putUvarint(w, uint64(r.level))
p.putVarint(w, r.num)
p.putVarint(w, r.size)
p.putBytes(w, r.imin)
p.putBytes(w, r.imax)
}
return p.err
}
func (p *sessionRecord) readUvarintMayEOF(field string, r io.ByteReader, mayEOF bool) uint64 {
if p.err != nil {
return 0
}
x, err := binary.ReadUvarint(r)
if err != nil {
if err == io.ErrUnexpectedEOF || (mayEOF == false && err == io.EOF) {
p.err = errors.NewErrCorrupted(storage.FileDesc{}, &ErrManifestCorrupted{field, "short read"})
} else if strings.HasPrefix(err.Error(), "binary:") {
p.err = errors.NewErrCorrupted(storage.FileDesc{}, &ErrManifestCorrupted{field, err.Error()})
} else {
p.err = err
}
return 0
}
return x
}
func (p *sessionRecord) readUvarint(field string, r io.ByteReader) uint64 {
return p.readUvarintMayEOF(field, r, false)
}
func (p *sessionRecord) readVarint(field string, r io.ByteReader) int64 {
x := int64(p.readUvarintMayEOF(field, r, false))
if x < 0 {
p.err = errors.NewErrCorrupted(storage.FileDesc{}, &ErrManifestCorrupted{field, "invalid negative value"})
}
return x
}
func (p *sessionRecord) readBytes(field string, r byteReader) []byte {
if p.err != nil {
return nil
}
n := p.readUvarint(field, r)
if p.err != nil {
return nil
}
x := make([]byte, n)
_, p.err = io.ReadFull(r, x)
if p.err != nil {
if p.err == io.ErrUnexpectedEOF {
p.err = errors.NewErrCorrupted(storage.FileDesc{}, &ErrManifestCorrupted{field, "short read"})
}
return nil
}
return x
}
func (p *sessionRecord) readLevel(field string, r io.ByteReader) int {
if p.err != nil {
return 0
}
x := p.readUvarint(field, r)
if p.err != nil {
return 0
}
return int(x)
}
func (p *sessionRecord) decode(r io.Reader) error {
br, ok := r.(byteReader)
if !ok {
br = bufio.NewReader(r)
}
p.err = nil
for p.err == nil {
rec := p.readUvarintMayEOF("field-header", br, true)
if p.err != nil {
if p.err == io.EOF {
return nil
}
return p.err
}
switch rec {
case recComparer:
x := p.readBytes("comparer", br)
if p.err == nil {
p.setComparer(string(x))
}
case recJournalNum:
x := p.readVarint("journal-num", br)
if p.err == nil {
p.setJournalNum(x)
}
case recPrevJournalNum:
x := p.readVarint("prev-journal-num", br)
if p.err == nil {
p.setPrevJournalNum(x)
}
case recNextFileNum:
x := p.readVarint("next-file-num", br)
if p.err == nil {
p.setNextFileNum(x)
}
case recSeqNum:
x := p.readUvarint("seq-num", br)
if p.err == nil {
p.setSeqNum(x)
}
case recCompPtr:
level := p.readLevel("comp-ptr.level", br)
ikey := p.readBytes("comp-ptr.ikey", br)
if p.err == nil {
p.addCompPtr(level, internalKey(ikey))
}
case recAddTable:
level := p.readLevel("add-table.level", br)
num := p.readVarint("add-table.num", br)
size := p.readVarint("add-table.size", br)
imin := p.readBytes("add-table.imin", br)
imax := p.readBytes("add-table.imax", br)
if p.err == nil {
p.addTable(level, num, size, imin, imax)
}
case recDelTable:
level := p.readLevel("del-table.level", br)
num := p.readVarint("del-table.num", br)
if p.err == nil {
p.delTable(level, num)
}
}
}
return p.err
}

271
vendor/github.com/syndtr/goleveldb/leveldb/session_util.go generated vendored Normal file
View File

@ -0,0 +1,271 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package leveldb
import (
"fmt"
"sync/atomic"
"github.com/syndtr/goleveldb/leveldb/journal"
"github.com/syndtr/goleveldb/leveldb/storage"
)
// Logging.
type dropper struct {
s *session
fd storage.FileDesc
}
func (d dropper) Drop(err error) {
if e, ok := err.(*journal.ErrCorrupted); ok {
d.s.logf("journal@drop %s-%d S·%s %q", d.fd.Type, d.fd.Num, shortenb(e.Size), e.Reason)
} else {
d.s.logf("journal@drop %s-%d %q", d.fd.Type, d.fd.Num, err)
}
}
func (s *session) log(v ...interface{}) { s.stor.Log(fmt.Sprint(v...)) }
func (s *session) logf(format string, v ...interface{}) { s.stor.Log(fmt.Sprintf(format, v...)) }
// File utils.
func (s *session) newTemp() storage.FileDesc {
num := atomic.AddInt64(&s.stTempFileNum, 1) - 1
return storage.FileDesc{Type: storage.TypeTemp, Num: num}
}
func (s *session) addFileRef(fd storage.FileDesc, ref int) int {
ref += s.fileRef[fd.Num]
if ref > 0 {
s.fileRef[fd.Num] = ref
} else if ref == 0 {
delete(s.fileRef, fd.Num)
} else {
panic(fmt.Sprintf("negative ref: %v", fd))
}
return ref
}
// Session state.
// Get current version. This will incr version ref, must call
// version.release (exactly once) after use.
func (s *session) version() *version {
s.vmu.Lock()
defer s.vmu.Unlock()
s.stVersion.incref()
return s.stVersion
}
func (s *session) tLen(level int) int {
s.vmu.Lock()
defer s.vmu.Unlock()
return s.stVersion.tLen(level)
}
// Set current version to v.
func (s *session) setVersion(v *version) {
s.vmu.Lock()
defer s.vmu.Unlock()
// Hold by session. It is important to call this first before releasing
// current version, otherwise the still used files might get released.
v.incref()
if s.stVersion != nil {
// Release current version.
s.stVersion.releaseNB()
}
s.stVersion = v
}
// Get current unused file number.
func (s *session) nextFileNum() int64 {
return atomic.LoadInt64(&s.stNextFileNum)
}
// Set current unused file number to num.
func (s *session) setNextFileNum(num int64) {
atomic.StoreInt64(&s.stNextFileNum, num)
}
// Mark file number as used.
func (s *session) markFileNum(num int64) {
nextFileNum := num + 1
for {
old, x := s.stNextFileNum, nextFileNum
if old > x {
x = old
}
if atomic.CompareAndSwapInt64(&s.stNextFileNum, old, x) {
break
}
}
}
// Allocate a file number.
func (s *session) allocFileNum() int64 {
return atomic.AddInt64(&s.stNextFileNum, 1) - 1
}
// Reuse given file number.
func (s *session) reuseFileNum(num int64) {
for {
old, x := s.stNextFileNum, num
if old != x+1 {
x = old
}
if atomic.CompareAndSwapInt64(&s.stNextFileNum, old, x) {
break
}
}
}
// Set compaction ptr at given level; need external synchronization.
func (s *session) setCompPtr(level int, ik internalKey) {
if level >= len(s.stCompPtrs) {
newCompPtrs := make([]internalKey, level+1)
copy(newCompPtrs, s.stCompPtrs)
s.stCompPtrs = newCompPtrs
}
s.stCompPtrs[level] = append(internalKey{}, ik...)
}
// Get compaction ptr at given level; need external synchronization.
func (s *session) getCompPtr(level int) internalKey {
if level >= len(s.stCompPtrs) {
return nil
}
return s.stCompPtrs[level]
}
// Manifest related utils.
// Fill given session record obj with current states; need external
// synchronization.
func (s *session) fillRecord(r *sessionRecord, snapshot bool) {
r.setNextFileNum(s.nextFileNum())
if snapshot {
if !r.has(recJournalNum) {
r.setJournalNum(s.stJournalNum)
}
if !r.has(recSeqNum) {
r.setSeqNum(s.stSeqNum)
}
for level, ik := range s.stCompPtrs {
if ik != nil {
r.addCompPtr(level, ik)
}
}
r.setComparer(s.icmp.uName())
}
}
// Mark if record has been committed, this will update session state;
// need external synchronization.
func (s *session) recordCommited(rec *sessionRecord) {
if rec.has(recJournalNum) {
s.stJournalNum = rec.journalNum
}
if rec.has(recPrevJournalNum) {
s.stPrevJournalNum = rec.prevJournalNum
}
if rec.has(recSeqNum) {
s.stSeqNum = rec.seqNum
}
for _, r := range rec.compPtrs {
s.setCompPtr(r.level, internalKey(r.ikey))
}
}
// Create a new manifest file; need external synchronization.
func (s *session) newManifest(rec *sessionRecord, v *version) (err error) {
fd := storage.FileDesc{Type: storage.TypeManifest, Num: s.allocFileNum()}
writer, err := s.stor.Create(fd)
if err != nil {
return
}
jw := journal.NewWriter(writer)
if v == nil {
v = s.version()
defer v.release()
}
if rec == nil {
rec = &sessionRecord{}
}
s.fillRecord(rec, true)
v.fillRecord(rec)
defer func() {
if err == nil {
s.recordCommited(rec)
if s.manifest != nil {
s.manifest.Close()
}
if s.manifestWriter != nil {
s.manifestWriter.Close()
}
if !s.manifestFd.Zero() {
s.stor.Remove(s.manifestFd)
}
s.manifestFd = fd
s.manifestWriter = writer
s.manifest = jw
} else {
writer.Close()
s.stor.Remove(fd)
s.reuseFileNum(fd.Num)
}
}()
w, err := jw.Next()
if err != nil {
return
}
err = rec.encode(w)
if err != nil {
return
}
err = jw.Flush()
if err != nil {
return
}
err = s.stor.SetMeta(fd)
return
}
// Flush record to disk.
func (s *session) flushManifest(rec *sessionRecord) (err error) {
s.fillRecord(rec, false)
w, err := s.manifest.Next()
if err != nil {
return
}
err = rec.encode(w)
if err != nil {
return
}
err = s.manifest.Flush()
if err != nil {
return
}
if !s.o.GetNoSync() {
err = s.manifestWriter.Sync()
if err != nil {
return
}
}
s.recordCommited(rec)
return
}

63
vendor/github.com/syndtr/goleveldb/leveldb/storage.go generated vendored Normal file
View File

@ -0,0 +1,63 @@
package leveldb
import (
"github.com/syndtr/goleveldb/leveldb/storage"
"sync/atomic"
)
type iStorage struct {
storage.Storage
read uint64
write uint64
}
func (c *iStorage) Open(fd storage.FileDesc) (storage.Reader, error) {
r, err := c.Storage.Open(fd)
return &iStorageReader{r, c}, err
}
func (c *iStorage) Create(fd storage.FileDesc) (storage.Writer, error) {
w, err := c.Storage.Create(fd)
return &iStorageWriter{w, c}, err
}
func (c *iStorage) reads() uint64 {
return atomic.LoadUint64(&c.read)
}
func (c *iStorage) writes() uint64 {
return atomic.LoadUint64(&c.write)
}
// newIStorage returns the given storage wrapped by iStorage.
func newIStorage(s storage.Storage) *iStorage {
return &iStorage{s, 0, 0}
}
type iStorageReader struct {
storage.Reader
c *iStorage
}
func (r *iStorageReader) Read(p []byte) (n int, err error) {
n, err = r.Reader.Read(p)
atomic.AddUint64(&r.c.read, uint64(n))
return n, err
}
func (r *iStorageReader) ReadAt(p []byte, off int64) (n int, err error) {
n, err = r.Reader.ReadAt(p, off)
atomic.AddUint64(&r.c.read, uint64(n))
return n, err
}
type iStorageWriter struct {
storage.Writer
c *iStorage
}
func (w *iStorageWriter) Write(p []byte) (n int, err error) {
n, err = w.Writer.Write(p)
atomic.AddUint64(&w.c.write, uint64(n))
return n, err
}

671
vendor/github.com/syndtr/goleveldb/leveldb/storage/file_storage.go generated vendored Normal file
View File

@ -0,0 +1,671 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reservefs.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package storage
import (
"errors"
"fmt"
"io"
"io/ioutil"
"os"
"path/filepath"
"runtime"
"sort"
"strconv"
"strings"
"sync"
"time"
)
var (
errFileOpen = errors.New("leveldb/storage: file still open")
errReadOnly = errors.New("leveldb/storage: storage is read-only")
)
type fileLock interface {
release() error
}
type fileStorageLock struct {
fs *fileStorage
}
func (lock *fileStorageLock) Unlock() {
if lock.fs != nil {
lock.fs.mu.Lock()
defer lock.fs.mu.Unlock()
if lock.fs.slock == lock {
lock.fs.slock = nil
}
}
}
type int64Slice []int64
func (p int64Slice) Len() int { return len(p) }
func (p int64Slice) Less(i, j int) bool { return p[i] < p[j] }
func (p int64Slice) Swap(i, j int) { p[i], p[j] = p[j], p[i] }
func writeFileSynced(filename string, data []byte, perm os.FileMode) error {
f, err := os.OpenFile(filename, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, perm)
if err != nil {
return err
}
n, err := f.Write(data)
if err == nil && n < len(data) {
err = io.ErrShortWrite
}
if err1 := f.Sync(); err == nil {
err = err1
}
if err1 := f.Close(); err == nil {
err = err1
}
return err
}
const logSizeThreshold = 1024 * 1024 // 1 MiB
// fileStorage is a file-system backed storage.
type fileStorage struct {
path string
readOnly bool
mu sync.Mutex
flock fileLock
slock *fileStorageLock
logw *os.File
logSize int64
buf []byte
// Opened file counter; if open < 0 means closed.
open int
day int
}
// OpenFile returns a new filesystem-backed storage implementation with the given
// path. This also acquire a file lock, so any subsequent attempt to open the
// same path will fail.
//
// The storage must be closed after use, by calling Close method.
func OpenFile(path string, readOnly bool) (Storage, error) {
if fi, err := os.Stat(path); err == nil {
if !fi.IsDir() {
return nil, fmt.Errorf("leveldb/storage: open %s: not a directory", path)
}
} else if os.IsNotExist(err) && !readOnly {
if err := os.MkdirAll(path, 0755); err != nil {
return nil, err
}
} else {
return nil, err
}
flock, err := newFileLock(filepath.Join(path, "LOCK"), readOnly)
if err != nil {
return nil, err
}
defer func() {
if err != nil {
flock.release()
}
}()
var (
logw *os.File
logSize int64
)
if !readOnly {
logw, err = os.OpenFile(filepath.Join(path, "LOG"), os.O_WRONLY|os.O_CREATE, 0644)
if err != nil {
return nil, err
}
logSize, err = logw.Seek(0, os.SEEK_END)
if err != nil {
logw.Close()
return nil, err
}
}
fs := &fileStorage{
path: path,
readOnly: readOnly,
flock: flock,
logw: logw,
logSize: logSize,
}
runtime.SetFinalizer(fs, (*fileStorage).Close)
return fs, nil
}
func (fs *fileStorage) Lock() (Locker, error) {
fs.mu.Lock()
defer fs.mu.Unlock()
if fs.open < 0 {
return nil, ErrClosed
}
if fs.readOnly {
return &fileStorageLock{}, nil
}
if fs.slock != nil {
return nil, ErrLocked
}
fs.slock = &fileStorageLock{fs: fs}
return fs.slock, nil
}
func itoa(buf []byte, i int, wid int) []byte {
u := uint(i)
if u == 0 && wid <= 1 {
return append(buf, '0')
}
// Assemble decimal in reverse order.
var b [32]byte
bp := len(b)
for ; u > 0 || wid > 0; u /= 10 {
bp--
wid--
b[bp] = byte(u%10) + '0'
}
return append(buf, b[bp:]...)
}
func (fs *fileStorage) printDay(t time.Time) {
if fs.day == t.Day() {
return
}
fs.day = t.Day()
fs.logw.Write([]byte("=============== " + t.Format("Jan 2, 2006 (MST)") + " ===============\n"))
}
func (fs *fileStorage) doLog(t time.Time, str string) {
if fs.logSize > logSizeThreshold {
// Rotate log file.
fs.logw.Close()
fs.logw = nil
fs.logSize = 0
rename(filepath.Join(fs.path, "LOG"), filepath.Join(fs.path, "LOG.old"))
}
if fs.logw == nil {
var err error
fs.logw, err = os.OpenFile(filepath.Join(fs.path, "LOG"), os.O_WRONLY|os.O_CREATE, 0644)
if err != nil {
return
}
// Force printDay on new log file.
fs.day = 0
}
fs.printDay(t)
hour, min, sec := t.Clock()
msec := t.Nanosecond() / 1e3
// time
fs.buf = itoa(fs.buf[:0], hour, 2)
fs.buf = append(fs.buf, ':')
fs.buf = itoa(fs.buf, min, 2)
fs.buf = append(fs.buf, ':')
fs.buf = itoa(fs.buf, sec, 2)
fs.buf = append(fs.buf, '.')
fs.buf = itoa(fs.buf, msec, 6)
fs.buf = append(fs.buf, ' ')
// write
fs.buf = append(fs.buf, []byte(str)...)
fs.buf = append(fs.buf, '\n')
n, _ := fs.logw.Write(fs.buf)
fs.logSize += int64(n)
}
func (fs *fileStorage) Log(str string) {
if !fs.readOnly {
t := time.Now()
fs.mu.Lock()
defer fs.mu.Unlock()
if fs.open < 0 {
return
}
fs.doLog(t, str)
}
}
func (fs *fileStorage) log(str string) {
if !fs.readOnly {
fs.doLog(time.Now(), str)
}
}
func (fs *fileStorage) setMeta(fd FileDesc) error {
content := fsGenName(fd) + "\n"
// Check and backup old CURRENT file.
currentPath := filepath.Join(fs.path, "CURRENT")
if _, err := os.Stat(currentPath); err == nil {
b, err := ioutil.ReadFile(currentPath)
if err != nil {
fs.log(fmt.Sprintf("backup CURRENT: %v", err))
return err
}
if string(b) == content {
// Content not changed, do nothing.
return nil
}
if err := writeFileSynced(currentPath+".bak", b, 0644); err != nil {
fs.log(fmt.Sprintf("backup CURRENT: %v", err))
return err
}
} else if !os.IsNotExist(err) {
return err
}
path := fmt.Sprintf("%s.%d", filepath.Join(fs.path, "CURRENT"), fd.Num)
if err := writeFileSynced(path, []byte(content), 0644); err != nil {
fs.log(fmt.Sprintf("create CURRENT.%d: %v", fd.Num, err))
return err
}
// Replace CURRENT file.
if err := rename(path, currentPath); err != nil {
fs.log(fmt.Sprintf("rename CURRENT.%d: %v", fd.Num, err))
return err
}
// Sync root directory.
if err := syncDir(fs.path); err != nil {
fs.log(fmt.Sprintf("syncDir: %v", err))
return err
}
return nil
}
func (fs *fileStorage) SetMeta(fd FileDesc) error {
if !FileDescOk(fd) {
return ErrInvalidFile
}
if fs.readOnly {
return errReadOnly
}
fs.mu.Lock()
defer fs.mu.Unlock()
if fs.open < 0 {
return ErrClosed
}
return fs.setMeta(fd)
}
func (fs *fileStorage) GetMeta() (FileDesc, error) {
fs.mu.Lock()
defer fs.mu.Unlock()
if fs.open < 0 {
return FileDesc{}, ErrClosed
}
dir, err := os.Open(fs.path)
if err != nil {
return FileDesc{}, err
}
names, err := dir.Readdirnames(0)
// Close the dir first before checking for Readdirnames error.
if ce := dir.Close(); ce != nil {
fs.log(fmt.Sprintf("close dir: %v", ce))
}
if err != nil {
return FileDesc{}, err
}
// Try this in order:
// - CURRENT.[0-9]+ ('pending rename' file, descending order)
// - CURRENT
// - CURRENT.bak
//
// Skip corrupted file or file that point to a missing target file.
type currentFile struct {
name string
fd FileDesc
}
tryCurrent := func(name string) (*currentFile, error) {
b, err := ioutil.ReadFile(filepath.Join(fs.path, name))
if err != nil {
if os.IsNotExist(err) {
err = os.ErrNotExist
}
return nil, err
}
var fd FileDesc
if len(b) < 1 || b[len(b)-1] != '\n' || !fsParseNamePtr(string(b[:len(b)-1]), &fd) {
fs.log(fmt.Sprintf("%s: corrupted content: %q", name, b))
err := &ErrCorrupted{
Err: errors.New("leveldb/storage: corrupted or incomplete CURRENT file"),
}
return nil, err
}
if _, err := os.Stat(filepath.Join(fs.path, fsGenName(fd))); err != nil {
if os.IsNotExist(err) {
fs.log(fmt.Sprintf("%s: missing target file: %s", name, fd))
err = os.ErrNotExist
}
return nil, err
}
return &currentFile{name: name, fd: fd}, nil
}
tryCurrents := func(names []string) (*currentFile, error) {
var (
cur *currentFile
// Last corruption error.
lastCerr error
)
for _, name := range names {
var err error
cur, err = tryCurrent(name)
if err == nil {
break
} else if err == os.ErrNotExist {
// Fallback to the next file.
} else if isCorrupted(err) {
lastCerr = err
// Fallback to the next file.
} else {
// In case the error is due to permission, etc.
return nil, err
}
}
if cur == nil {
err := os.ErrNotExist
if lastCerr != nil {
err = lastCerr
}
return nil, err
}
return cur, nil
}
// Try 'pending rename' files.
var nums []int64
for _, name := range names {
if strings.HasPrefix(name, "CURRENT.") && name != "CURRENT.bak" {
i, err := strconv.ParseInt(name[8:], 10, 64)
if err == nil {
nums = append(nums, i)
}
}
}
var (
pendCur *currentFile
pendErr = os.ErrNotExist
pendNames []string
)
if len(nums) > 0 {
sort.Sort(sort.Reverse(int64Slice(nums)))
pendNames = make([]string, len(nums))
for i, num := range nums {
pendNames[i] = fmt.Sprintf("CURRENT.%d", num)
}
pendCur, pendErr = tryCurrents(pendNames)
if pendErr != nil && pendErr != os.ErrNotExist && !isCorrupted(pendErr) {
return FileDesc{}, pendErr
}
}
// Try CURRENT and CURRENT.bak.
curCur, curErr := tryCurrents([]string{"CURRENT", "CURRENT.bak"})
if curErr != nil && curErr != os.ErrNotExist && !isCorrupted(curErr) {
return FileDesc{}, curErr
}
// pendCur takes precedence, but guards against obsolete pendCur.
if pendCur != nil && (curCur == nil || pendCur.fd.Num > curCur.fd.Num) {
curCur = pendCur
}
if curCur != nil {
// Restore CURRENT file to proper state.
if !fs.readOnly && (curCur.name != "CURRENT" || len(pendNames) != 0) {
// Ignore setMeta errors, however don't delete obsolete files if we
// catch error.
if err := fs.setMeta(curCur.fd); err == nil {
// Remove 'pending rename' files.
for _, name := range pendNames {
if err := os.Remove(filepath.Join(fs.path, name)); err != nil {
fs.log(fmt.Sprintf("remove %s: %v", name, err))
}
}
}
}
return curCur.fd, nil
}
// Nothing found.
if isCorrupted(pendErr) {
return FileDesc{}, pendErr
}
return FileDesc{}, curErr
}
func (fs *fileStorage) List(ft FileType) (fds []FileDesc, err error) {
fs.mu.Lock()
defer fs.mu.Unlock()
if fs.open < 0 {
return nil, ErrClosed
}
dir, err := os.Open(fs.path)
if err != nil {
return
}
names, err := dir.Readdirnames(0)
// Close the dir first before checking for Readdirnames error.
if cerr := dir.Close(); cerr != nil {
fs.log(fmt.Sprintf("close dir: %v", cerr))
}
if err == nil {
for _, name := range names {
if fd, ok := fsParseName(name); ok && fd.Type&ft != 0 {
fds = append(fds, fd)
}
}
}
return
}
func (fs *fileStorage) Open(fd FileDesc) (Reader, error) {
if !FileDescOk(fd) {
return nil, ErrInvalidFile
}
fs.mu.Lock()
defer fs.mu.Unlock()
if fs.open < 0 {
return nil, ErrClosed
}
of, err := os.OpenFile(filepath.Join(fs.path, fsGenName(fd)), os.O_RDONLY, 0)
if err != nil {
if fsHasOldName(fd) && os.IsNotExist(err) {
of, err = os.OpenFile(filepath.Join(fs.path, fsGenOldName(fd)), os.O_RDONLY, 0)
if err == nil {
goto ok
}
}
return nil, err
}
ok:
fs.open++
return &fileWrap{File: of, fs: fs, fd: fd}, nil
}
func (fs *fileStorage) Create(fd FileDesc) (Writer, error) {
if !FileDescOk(fd) {
return nil, ErrInvalidFile
}
if fs.readOnly {
return nil, errReadOnly
}
fs.mu.Lock()
defer fs.mu.Unlock()
if fs.open < 0 {
return nil, ErrClosed
}
of, err := os.OpenFile(filepath.Join(fs.path, fsGenName(fd)), os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
if err != nil {
return nil, err
}
fs.open++
return &fileWrap{File: of, fs: fs, fd: fd}, nil
}
func (fs *fileStorage) Remove(fd FileDesc) error {
if !FileDescOk(fd) {
return ErrInvalidFile
}
if fs.readOnly {
return errReadOnly
}
fs.mu.Lock()
defer fs.mu.Unlock()
if fs.open < 0 {
return ErrClosed
}
err := os.Remove(filepath.Join(fs.path, fsGenName(fd)))
if err != nil {
if fsHasOldName(fd) && os.IsNotExist(err) {
if e1 := os.Remove(filepath.Join(fs.path, fsGenOldName(fd))); !os.IsNotExist(e1) {
fs.log(fmt.Sprintf("remove %s: %v (old name)", fd, err))
err = e1
}
} else {
fs.log(fmt.Sprintf("remove %s: %v", fd, err))
}
}
return err
}
func (fs *fileStorage) Rename(oldfd, newfd FileDesc) error {
if !FileDescOk(oldfd) || !FileDescOk(newfd) {
return ErrInvalidFile
}
if oldfd == newfd {
return nil
}
if fs.readOnly {
return errReadOnly
}
fs.mu.Lock()
defer fs.mu.Unlock()
if fs.open < 0 {
return ErrClosed
}
return rename(filepath.Join(fs.path, fsGenName(oldfd)), filepath.Join(fs.path, fsGenName(newfd)))
}
func (fs *fileStorage) Close() error {
fs.mu.Lock()
defer fs.mu.Unlock()
if fs.open < 0 {
return ErrClosed
}
// Clear the finalizer.
runtime.SetFinalizer(fs, nil)
if fs.open > 0 {
fs.log(fmt.Sprintf("close: warning, %d files still open", fs.open))
}
fs.open = -1
if fs.logw != nil {
fs.logw.Close()
}
return fs.flock.release()
}
type fileWrap struct {
*os.File
fs *fileStorage
fd FileDesc
closed bool
}
func (fw *fileWrap) Sync() error {
if err := fw.File.Sync(); err != nil {
return err
}
if fw.fd.Type == TypeManifest {
// Also sync parent directory if file type is manifest.
// See: https://code.google.com/p/leveldb/issues/detail?id=190.
if err := syncDir(fw.fs.path); err != nil {
fw.fs.log(fmt.Sprintf("syncDir: %v", err))
return err
}
}
return nil
}
func (fw *fileWrap) Close() error {
fw.fs.mu.Lock()
defer fw.fs.mu.Unlock()
if fw.closed {
return ErrClosed
}
fw.closed = true
fw.fs.open--
err := fw.File.Close()
if err != nil {
fw.fs.log(fmt.Sprintf("close %s: %v", fw.fd, err))
}
return err
}
func fsGenName(fd FileDesc) string {
switch fd.Type {
case TypeManifest:
return fmt.Sprintf("MANIFEST-%06d", fd.Num)
case TypeJournal:
return fmt.Sprintf("%06d.log", fd.Num)
case TypeTable:
return fmt.Sprintf("%06d.ldb", fd.Num)
case TypeTemp:
return fmt.Sprintf("%06d.tmp", fd.Num)
default:
panic("invalid file type")
}
}
func fsHasOldName(fd FileDesc) bool {
return fd.Type == TypeTable
}
func fsGenOldName(fd FileDesc) string {
switch fd.Type {
case TypeTable:
return fmt.Sprintf("%06d.sst", fd.Num)
}
return fsGenName(fd)
}
func fsParseName(name string) (fd FileDesc, ok bool) {
var tail string
_, err := fmt.Sscanf(name, "%d.%s", &fd.Num, &tail)
if err == nil {
switch tail {
case "log":
fd.Type = TypeJournal
case "ldb", "sst":
fd.Type = TypeTable
case "tmp":
fd.Type = TypeTemp
default:
return
}
return fd, true
}
n, _ := fmt.Sscanf(name, "MANIFEST-%d%s", &fd.Num, &tail)
if n == 1 {
fd.Type = TypeManifest
return fd, true
}
return
}
func fsParseNamePtr(name string, fd *FileDesc) bool {
_fd, ok := fsParseName(name)
if fd != nil {
*fd = _fd
}
return ok
}

34
vendor/github.com/syndtr/goleveldb/leveldb/storage/file_storage_nacl.go generated vendored Normal file
View File

@ -0,0 +1,34 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// +build nacl
package storage
import (
"os"
"syscall"
)
func newFileLock(path string, readOnly bool) (fl fileLock, err error) {
return nil, syscall.ENOTSUP
}
func setFileLock(f *os.File, readOnly, lock bool) error {
return syscall.ENOTSUP
}
func rename(oldpath, newpath string) error {
return syscall.ENOTSUP
}
func isErrInvalid(err error) bool {
return false
}
func syncDir(name string) error {
return syscall.ENOTSUP
}

63
vendor/github.com/syndtr/goleveldb/leveldb/storage/file_storage_plan9.go generated vendored Normal file
View File

@ -0,0 +1,63 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package storage
import (
"os"
)
type plan9FileLock struct {
f *os.File
}
func (fl *plan9FileLock) release() error {
return fl.f.Close()
}
func newFileLock(path string, readOnly bool) (fl fileLock, err error) {
var (
flag int
perm os.FileMode
)
if readOnly {
flag = os.O_RDONLY
} else {
flag = os.O_RDWR
perm = os.ModeExclusive
}
f, err := os.OpenFile(path, flag, perm)
if os.IsNotExist(err) {
f, err = os.OpenFile(path, flag|os.O_CREATE, perm|0644)
}
if err != nil {
return
}
fl = &plan9FileLock{f: f}
return
}
func rename(oldpath, newpath string) error {
if _, err := os.Stat(newpath); err == nil {
if err := os.Remove(newpath); err != nil {
return err
}
}
return os.Rename(oldpath, newpath)
}
func syncDir(name string) error {
f, err := os.Open(name)
if err != nil {
return err
}
defer f.Close()
if err := f.Sync(); err != nil {
return err
}
return nil
}

81
vendor/github.com/syndtr/goleveldb/leveldb/storage/file_storage_solaris.go generated vendored Normal file
View File

@ -0,0 +1,81 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// +build solaris
package storage
import (
"os"
"syscall"
)
type unixFileLock struct {
f *os.File
}
func (fl *unixFileLock) release() error {
if err := setFileLock(fl.f, false, false); err != nil {
return err
}
return fl.f.Close()
}
func newFileLock(path string, readOnly bool) (fl fileLock, err error) {
var flag int
if readOnly {
flag = os.O_RDONLY
} else {
flag = os.O_RDWR
}
f, err := os.OpenFile(path, flag, 0)
if os.IsNotExist(err) {
f, err = os.OpenFile(path, flag|os.O_CREATE, 0644)
}
if err != nil {
return
}
err = setFileLock(f, readOnly, true)
if err != nil {
f.Close()
return
}
fl = &unixFileLock{f: f}
return
}
func setFileLock(f *os.File, readOnly, lock bool) error {
flock := syscall.Flock_t{
Type: syscall.F_UNLCK,
Start: 0,
Len: 0,
Whence: 1,
}
if lock {
if readOnly {
flock.Type = syscall.F_RDLCK
} else {
flock.Type = syscall.F_WRLCK
}
}
return syscall.FcntlFlock(f.Fd(), syscall.F_SETLK, &flock)
}
func rename(oldpath, newpath string) error {
return os.Rename(oldpath, newpath)
}
func syncDir(name string) error {
f, err := os.Open(name)
if err != nil {
return err
}
defer f.Close()
if err := f.Sync(); err != nil {
return err
}
return nil
}

98
vendor/github.com/syndtr/goleveldb/leveldb/storage/file_storage_unix.go generated vendored Normal file
View File

@ -0,0 +1,98 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// +build darwin dragonfly freebsd linux netbsd openbsd
package storage
import (
"os"
"syscall"
)
type unixFileLock struct {
f *os.File
}
func (fl *unixFileLock) release() error {
if err := setFileLock(fl.f, false, false); err != nil {
return err
}
return fl.f.Close()
}
func newFileLock(path string, readOnly bool) (fl fileLock, err error) {
var flag int
if readOnly {
flag = os.O_RDONLY
} else {
flag = os.O_RDWR
}
f, err := os.OpenFile(path, flag, 0)
if os.IsNotExist(err) {
f, err = os.OpenFile(path, flag|os.O_CREATE, 0644)
}
if err != nil {
return
}
err = setFileLock(f, readOnly, true)
if err != nil {
f.Close()
return
}
fl = &unixFileLock{f: f}
return
}
func setFileLock(f *os.File, readOnly, lock bool) error {
how := syscall.LOCK_UN
if lock {
if readOnly {
how = syscall.LOCK_SH
} else {
how = syscall.LOCK_EX
}
}
return syscall.Flock(int(f.Fd()), how|syscall.LOCK_NB)
}
func rename(oldpath, newpath string) error {
return os.Rename(oldpath, newpath)
}
func isErrInvalid(err error) bool {
if err == os.ErrInvalid {
return true
}
// Go < 1.8
if syserr, ok := err.(*os.SyscallError); ok && syserr.Err == syscall.EINVAL {
return true
}
// Go >= 1.8 returns *os.PathError instead
if patherr, ok := err.(*os.PathError); ok && patherr.Err == syscall.EINVAL {
return true
}
return false
}
func syncDir(name string) error {
// As per fsync manpage, Linux seems to expect fsync on directory, however
// some system don't support this, so we will ignore syscall.EINVAL.
//
// From fsync(2):
// Calling fsync() does not necessarily ensure that the entry in the
// directory containing the file has also reached disk. For that an
// explicit fsync() on a file descriptor for the directory is also needed.
f, err := os.Open(name)
if err != nil {
return err
}
defer f.Close()
if err := f.Sync(); err != nil && !isErrInvalid(err) {
return err
}
return nil
}

78
vendor/github.com/syndtr/goleveldb/leveldb/storage/file_storage_windows.go generated vendored Normal file
View File

@ -0,0 +1,78 @@
// Copyright (c) 2013, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package storage
import (
"syscall"
"unsafe"
)
var (
modkernel32 = syscall.NewLazyDLL("kernel32.dll")
procMoveFileExW = modkernel32.NewProc("MoveFileExW")
)
const (
_MOVEFILE_REPLACE_EXISTING = 1
)
type windowsFileLock struct {
fd syscall.Handle
}
func (fl *windowsFileLock) release() error {
return syscall.Close(fl.fd)
}
func newFileLock(path string, readOnly bool) (fl fileLock, err error) {
pathp, err := syscall.UTF16PtrFromString(path)
if err != nil {
return
}
var access, shareMode uint32
if readOnly {
access = syscall.GENERIC_READ
shareMode = syscall.FILE_SHARE_READ
} else {
access = syscall.GENERIC_READ | syscall.GENERIC_WRITE
}
fd, err := syscall.CreateFile(pathp, access, shareMode, nil, syscall.OPEN_EXISTING, syscall.FILE_ATTRIBUTE_NORMAL, 0)
if err == syscall.ERROR_FILE_NOT_FOUND {
fd, err = syscall.CreateFile(pathp, access, shareMode, nil, syscall.OPEN_ALWAYS, syscall.FILE_ATTRIBUTE_NORMAL, 0)
}
if err != nil {
return
}
fl = &windowsFileLock{fd: fd}
return
}
func moveFileEx(from *uint16, to *uint16, flags uint32) error {
r1, _, e1 := syscall.Syscall(procMoveFileExW.Addr(), 3, uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(to)), uintptr(flags))
if r1 == 0 {
if e1 != 0 {
return error(e1)
}
return syscall.EINVAL
}
return nil
}
func rename(oldpath, newpath string) error {
from, err := syscall.UTF16PtrFromString(oldpath)
if err != nil {
return err
}
to, err := syscall.UTF16PtrFromString(newpath)
if err != nil {
return err
}
return moveFileEx(from, to, _MOVEFILE_REPLACE_EXISTING)
}
func syncDir(name string) error { return nil }

222
vendor/github.com/syndtr/goleveldb/leveldb/storage/mem_storage.go generated vendored Normal file
View File

@ -0,0 +1,222 @@
// Copyright (c) 2013, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package storage
import (
"bytes"
"os"
"sync"
)
const typeShift = 4
// Verify at compile-time that typeShift is large enough to cover all FileType
// values by confirming that 0 == 0.
var _ [0]struct{} = [TypeAll >> typeShift]struct{}{}
type memStorageLock struct {
ms *memStorage
}
func (lock *memStorageLock) Unlock() {
ms := lock.ms
ms.mu.Lock()
defer ms.mu.Unlock()
if ms.slock == lock {
ms.slock = nil
}
return
}
// memStorage is a memory-backed storage.
type memStorage struct {
mu sync.Mutex
slock *memStorageLock
files map[uint64]*memFile
meta FileDesc
}
// NewMemStorage returns a new memory-backed storage implementation.
func NewMemStorage() Storage {
return &memStorage{
files: make(map[uint64]*memFile),
}
}
func (ms *memStorage) Lock() (Locker, error) {
ms.mu.Lock()
defer ms.mu.Unlock()
if ms.slock != nil {
return nil, ErrLocked
}
ms.slock = &memStorageLock{ms: ms}
return ms.slock, nil
}
func (*memStorage) Log(str string) {}
func (ms *memStorage) SetMeta(fd FileDesc) error {
if !FileDescOk(fd) {
return ErrInvalidFile
}
ms.mu.Lock()
ms.meta = fd
ms.mu.Unlock()
return nil
}
func (ms *memStorage) GetMeta() (FileDesc, error) {
ms.mu.Lock()
defer ms.mu.Unlock()
if ms.meta.Zero() {
return FileDesc{}, os.ErrNotExist
}
return ms.meta, nil
}
func (ms *memStorage) List(ft FileType) ([]FileDesc, error) {
ms.mu.Lock()
var fds []FileDesc
for x := range ms.files {
fd := unpackFile(x)
if fd.Type&ft != 0 {
fds = append(fds, fd)
}
}
ms.mu.Unlock()
return fds, nil
}
func (ms *memStorage) Open(fd FileDesc) (Reader, error) {
if !FileDescOk(fd) {
return nil, ErrInvalidFile
}
ms.mu.Lock()
defer ms.mu.Unlock()
if m, exist := ms.files[packFile(fd)]; exist {
if m.open {
return nil, errFileOpen
}
m.open = true
return &memReader{Reader: bytes.NewReader(m.Bytes()), ms: ms, m: m}, nil
}
return nil, os.ErrNotExist
}
func (ms *memStorage) Create(fd FileDesc) (Writer, error) {
if !FileDescOk(fd) {
return nil, ErrInvalidFile
}
x := packFile(fd)
ms.mu.Lock()
defer ms.mu.Unlock()
m, exist := ms.files[x]
if exist {
if m.open {
return nil, errFileOpen
}
m.Reset()
} else {
m = &memFile{}
ms.files[x] = m
}
m.open = true
return &memWriter{memFile: m, ms: ms}, nil
}
func (ms *memStorage) Remove(fd FileDesc) error {
if !FileDescOk(fd) {
return ErrInvalidFile
}
x := packFile(fd)
ms.mu.Lock()
defer ms.mu.Unlock()
if _, exist := ms.files[x]; exist {
delete(ms.files, x)
return nil
}
return os.ErrNotExist
}
func (ms *memStorage) Rename(oldfd, newfd FileDesc) error {
if !FileDescOk(oldfd) || !FileDescOk(newfd) {
return ErrInvalidFile
}
if oldfd == newfd {
return nil
}
oldx := packFile(oldfd)
newx := packFile(newfd)
ms.mu.Lock()
defer ms.mu.Unlock()
oldm, exist := ms.files[oldx]
if !exist {
return os.ErrNotExist
}
newm, exist := ms.files[newx]
if (exist && newm.open) || oldm.open {
return errFileOpen
}
delete(ms.files, oldx)
ms.files[newx] = oldm
return nil
}
func (*memStorage) Close() error { return nil }
type memFile struct {
bytes.Buffer
open bool
}
type memReader struct {
*bytes.Reader
ms *memStorage
m *memFile
closed bool
}
func (mr *memReader) Close() error {
mr.ms.mu.Lock()
defer mr.ms.mu.Unlock()
if mr.closed {
return ErrClosed
}
mr.m.open = false
return nil
}
type memWriter struct {
*memFile
ms *memStorage
closed bool
}
func (*memWriter) Sync() error { return nil }
func (mw *memWriter) Close() error {
mw.ms.mu.Lock()
defer mw.ms.mu.Unlock()
if mw.closed {
return ErrClosed
}
mw.memFile.open = false
return nil
}
func packFile(fd FileDesc) uint64 {
return uint64(fd.Num)<<typeShift | uint64(fd.Type)
}
func unpackFile(x uint64) FileDesc {
return FileDesc{FileType(x) & TypeAll, int64(x >> typeShift)}
}

187
vendor/github.com/syndtr/goleveldb/leveldb/storage/storage.go generated vendored Normal file
View File

@ -0,0 +1,187 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Package storage provides storage abstraction for LevelDB.
package storage
import (
"errors"
"fmt"
"io"
)
// FileType represent a file type.
type FileType int
// File types.
const (
TypeManifest FileType = 1 << iota
TypeJournal
TypeTable
TypeTemp
TypeAll = TypeManifest | TypeJournal | TypeTable | TypeTemp
)
func (t FileType) String() string {
switch t {
case TypeManifest:
return "manifest"
case TypeJournal:
return "journal"
case TypeTable:
return "table"
case TypeTemp:
return "temp"
}
return fmt.Sprintf("<unknown:%d>", t)
}
// Common error.
var (
ErrInvalidFile = errors.New("leveldb/storage: invalid file for argument")
ErrLocked = errors.New("leveldb/storage: already locked")
ErrClosed = errors.New("leveldb/storage: closed")
)
// ErrCorrupted is the type that wraps errors that indicate corruption of
// a file. Package storage has its own type instead of using
// errors.ErrCorrupted to prevent circular import.
type ErrCorrupted struct {
Fd FileDesc
Err error
}
func isCorrupted(err error) bool {
switch err.(type) {
case *ErrCorrupted:
return true
}
return false
}
func (e *ErrCorrupted) Error() string {
if !e.Fd.Zero() {
return fmt.Sprintf("%v [file=%v]", e.Err, e.Fd)
}
return e.Err.Error()
}
// Syncer is the interface that wraps basic Sync method.
type Syncer interface {
// Sync commits the current contents of the file to stable storage.
Sync() error
}
// Reader is the interface that groups the basic Read, Seek, ReadAt and Close
// methods.
type Reader interface {
io.ReadSeeker
io.ReaderAt
io.Closer
}
// Writer is the interface that groups the basic Write, Sync and Close
// methods.
type Writer interface {
io.WriteCloser
Syncer
}
// Locker is the interface that wraps Unlock method.
type Locker interface {
Unlock()
}
// FileDesc is a 'file descriptor'.
type FileDesc struct {
Type FileType
Num int64
}
func (fd FileDesc) String() string {
switch fd.Type {
case TypeManifest:
return fmt.Sprintf("MANIFEST-%06d", fd.Num)
case TypeJournal:
return fmt.Sprintf("%06d.log", fd.Num)
case TypeTable:
return fmt.Sprintf("%06d.ldb", fd.Num)
case TypeTemp:
return fmt.Sprintf("%06d.tmp", fd.Num)
default:
return fmt.Sprintf("%#x-%d", fd.Type, fd.Num)
}
}
// Zero returns true if fd == (FileDesc{}).
func (fd FileDesc) Zero() bool {
return fd == (FileDesc{})
}
// FileDescOk returns true if fd is a valid 'file descriptor'.
func FileDescOk(fd FileDesc) bool {
switch fd.Type {
case TypeManifest:
case TypeJournal:
case TypeTable:
case TypeTemp:
default:
return false
}
return fd.Num >= 0
}
// Storage is the storage. A storage instance must be safe for concurrent use.
type Storage interface {
// Lock locks the storage. Any subsequent attempt to call Lock will fail
// until the last lock released.
// Caller should call Unlock method after use.
Lock() (Locker, error)
// Log logs a string. This is used for logging.
// An implementation may write to a file, stdout or simply do nothing.
Log(str string)
// SetMeta store 'file descriptor' that can later be acquired using GetMeta
// method. The 'file descriptor' should point to a valid file.
// SetMeta should be implemented in such way that changes should happen
// atomically.
SetMeta(fd FileDesc) error
// GetMeta returns 'file descriptor' stored in meta. The 'file descriptor'
// can be updated using SetMeta method.
// Returns os.ErrNotExist if meta doesn't store any 'file descriptor', or
// 'file descriptor' point to nonexistent file.
GetMeta() (FileDesc, error)
// List returns file descriptors that match the given file types.
// The file types may be OR'ed together.
List(ft FileType) ([]FileDesc, error)
// Open opens file with the given 'file descriptor' read-only.
// Returns os.ErrNotExist error if the file does not exist.
// Returns ErrClosed if the underlying storage is closed.
Open(fd FileDesc) (Reader, error)
// Create creates file with the given 'file descriptor', truncate if already
// exist and opens write-only.
// Returns ErrClosed if the underlying storage is closed.
Create(fd FileDesc) (Writer, error)
// Remove removes file with the given 'file descriptor'.
// Returns ErrClosed if the underlying storage is closed.
Remove(fd FileDesc) error
// Rename renames file from oldfd to newfd.
// Returns ErrClosed if the underlying storage is closed.
Rename(oldfd, newfd FileDesc) error
// Close closes the storage.
// It is valid to call Close multiple times. Other methods should not be
// called after the storage has been closed.
Close() error
}

531
vendor/github.com/syndtr/goleveldb/leveldb/table.go generated vendored Normal file
View File

@ -0,0 +1,531 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package leveldb
import (
"fmt"
"sort"
"sync/atomic"
"github.com/syndtr/goleveldb/leveldb/cache"
"github.com/syndtr/goleveldb/leveldb/iterator"
"github.com/syndtr/goleveldb/leveldb/opt"
"github.com/syndtr/goleveldb/leveldb/storage"
"github.com/syndtr/goleveldb/leveldb/table"
"github.com/syndtr/goleveldb/leveldb/util"
)
// tFile holds basic information about a table.
type tFile struct {
fd storage.FileDesc
seekLeft int32
size int64
imin, imax internalKey
}
// Returns true if given key is after largest key of this table.
func (t *tFile) after(icmp *iComparer, ukey []byte) bool {
return ukey != nil && icmp.uCompare(ukey, t.imax.ukey()) > 0
}
// Returns true if given key is before smallest key of this table.
func (t *tFile) before(icmp *iComparer, ukey []byte) bool {
return ukey != nil && icmp.uCompare(ukey, t.imin.ukey()) < 0
}
// Returns true if given key range overlaps with this table key range.
func (t *tFile) overlaps(icmp *iComparer, umin, umax []byte) bool {
return !t.after(icmp, umin) && !t.before(icmp, umax)
}
// Cosumes one seek and return current seeks left.
func (t *tFile) consumeSeek() int32 {
return atomic.AddInt32(&t.seekLeft, -1)
}
// Creates new tFile.
func newTableFile(fd storage.FileDesc, size int64, imin, imax internalKey) *tFile {
f := &tFile{
fd: fd,
size: size,
imin: imin,
imax: imax,
}
// We arrange to automatically compact this file after
// a certain number of seeks. Let's assume:
// (1) One seek costs 10ms
// (2) Writing or reading 1MB costs 10ms (100MB/s)
// (3) A compaction of 1MB does 25MB of IO:
// 1MB read from this level
// 10-12MB read from next level (boundaries may be misaligned)
// 10-12MB written to next level
// This implies that 25 seeks cost the same as the compaction
// of 1MB of data. I.e., one seek costs approximately the
// same as the compaction of 40KB of data. We are a little
// conservative and allow approximately one seek for every 16KB
// of data before triggering a compaction.
f.seekLeft = int32(size / 16384)
if f.seekLeft < 100 {
f.seekLeft = 100
}
return f
}
func tableFileFromRecord(r atRecord) *tFile {
return newTableFile(storage.FileDesc{Type: storage.TypeTable, Num: r.num}, r.size, r.imin, r.imax)
}
// tFiles hold multiple tFile.
type tFiles []*tFile
func (tf tFiles) Len() int { return len(tf) }
func (tf tFiles) Swap(i, j int) { tf[i], tf[j] = tf[j], tf[i] }
func (tf tFiles) nums() string {
x := "[ "
for i, f := range tf {
if i != 0 {
x += ", "
}
x += fmt.Sprint(f.fd.Num)
}
x += " ]"
return x
}
// Returns true if i smallest key is less than j.
// This used for sort by key in ascending order.
func (tf tFiles) lessByKey(icmp *iComparer, i, j int) bool {
a, b := tf[i], tf[j]
n := icmp.Compare(a.imin, b.imin)
if n == 0 {
return a.fd.Num < b.fd.Num
}
return n < 0
}
// Returns true if i file number is greater than j.
// This used for sort by file number in descending order.
func (tf tFiles) lessByNum(i, j int) bool {
return tf[i].fd.Num > tf[j].fd.Num
}
// Sorts tables by key in ascending order.
func (tf tFiles) sortByKey(icmp *iComparer) {
sort.Sort(&tFilesSortByKey{tFiles: tf, icmp: icmp})
}
// Sorts tables by file number in descending order.
func (tf tFiles) sortByNum() {
sort.Sort(&tFilesSortByNum{tFiles: tf})
}
// Returns sum of all tables size.
func (tf tFiles) size() (sum int64) {
for _, t := range tf {
sum += t.size
}
return sum
}
// Searches smallest index of tables whose its smallest
// key is after or equal with given key.
func (tf tFiles) searchMin(icmp *iComparer, ikey internalKey) int {
return sort.Search(len(tf), func(i int) bool {
return icmp.Compare(tf[i].imin, ikey) >= 0
})
}
// Searches smallest index of tables whose its largest
// key is after or equal with given key.
func (tf tFiles) searchMax(icmp *iComparer, ikey internalKey) int {
return sort.Search(len(tf), func(i int) bool {
return icmp.Compare(tf[i].imax, ikey) >= 0
})
}
// Returns true if given key range overlaps with one or more
// tables key range. If unsorted is true then binary search will not be used.
func (tf tFiles) overlaps(icmp *iComparer, umin, umax []byte, unsorted bool) bool {
if unsorted {
// Check against all files.
for _, t := range tf {
if t.overlaps(icmp, umin, umax) {
return true
}
}
return false
}
i := 0
if len(umin) > 0 {
// Find the earliest possible internal key for min.
i = tf.searchMax(icmp, makeInternalKey(nil, umin, keyMaxSeq, keyTypeSeek))
}
if i >= len(tf) {
// Beginning of range is after all files, so no overlap.
return false
}
return !tf[i].before(icmp, umax)
}
// Returns tables whose its key range overlaps with given key range.
// Range will be expanded if ukey found hop across tables.
// If overlapped is true then the search will be restarted if umax
// expanded.
// The dst content will be overwritten.
func (tf tFiles) getOverlaps(dst tFiles, icmp *iComparer, umin, umax []byte, overlapped bool) tFiles {
dst = dst[:0]
for i := 0; i < len(tf); {
t := tf[i]
if t.overlaps(icmp, umin, umax) {
if umin != nil && icmp.uCompare(t.imin.ukey(), umin) < 0 {
umin = t.imin.ukey()
dst = dst[:0]
i = 0
continue
} else if umax != nil && icmp.uCompare(t.imax.ukey(), umax) > 0 {
umax = t.imax.ukey()
// Restart search if it is overlapped.
if overlapped {
dst = dst[:0]
i = 0
continue
}
}
dst = append(dst, t)
}
i++
}
return dst
}
// Returns tables key range.
func (tf tFiles) getRange(icmp *iComparer) (imin, imax internalKey) {
for i, t := range tf {
if i == 0 {
imin, imax = t.imin, t.imax
continue
}
if icmp.Compare(t.imin, imin) < 0 {
imin = t.imin
}
if icmp.Compare(t.imax, imax) > 0 {
imax = t.imax
}
}
return
}
// Creates iterator index from tables.
func (tf tFiles) newIndexIterator(tops *tOps, icmp *iComparer, slice *util.Range, ro *opt.ReadOptions) iterator.IteratorIndexer {
if slice != nil {
var start, limit int
if slice.Start != nil {
start = tf.searchMax(icmp, internalKey(slice.Start))
}
if slice.Limit != nil {
limit = tf.searchMin(icmp, internalKey(slice.Limit))
} else {
limit = tf.Len()
}
tf = tf[start:limit]
}
return iterator.NewArrayIndexer(&tFilesArrayIndexer{
tFiles: tf,
tops: tops,
icmp: icmp,
slice: slice,
ro: ro,
})
}
// Tables iterator index.
type tFilesArrayIndexer struct {
tFiles
tops *tOps
icmp *iComparer
slice *util.Range
ro *opt.ReadOptions
}
func (a *tFilesArrayIndexer) Search(key []byte) int {
return a.searchMax(a.icmp, internalKey(key))
}
func (a *tFilesArrayIndexer) Get(i int) iterator.Iterator {
if i == 0 || i == a.Len()-1 {
return a.tops.newIterator(a.tFiles[i], a.slice, a.ro)
}
return a.tops.newIterator(a.tFiles[i], nil, a.ro)
}
// Helper type for sortByKey.
type tFilesSortByKey struct {
tFiles
icmp *iComparer
}
func (x *tFilesSortByKey) Less(i, j int) bool {
return x.lessByKey(x.icmp, i, j)
}
// Helper type for sortByNum.
type tFilesSortByNum struct {
tFiles
}
func (x *tFilesSortByNum) Less(i, j int) bool {
return x.lessByNum(i, j)
}
// Table operations.
type tOps struct {
s *session
noSync bool
evictRemoved bool
cache *cache.Cache
bcache *cache.Cache
bpool *util.BufferPool
}
// Creates an empty table and returns table writer.
func (t *tOps) create() (*tWriter, error) {
fd := storage.FileDesc{Type: storage.TypeTable, Num: t.s.allocFileNum()}
fw, err := t.s.stor.Create(fd)
if err != nil {
return nil, err
}
return &tWriter{
t: t,
fd: fd,
w: fw,
tw: table.NewWriter(fw, t.s.o.Options),
}, nil
}
// Builds table from src iterator.
func (t *tOps) createFrom(src iterator.Iterator) (f *tFile, n int, err error) {
w, err := t.create()
if err != nil {
return
}
defer func() {
if err != nil {
w.drop()
}
}()
for src.Next() {
err = w.append(src.Key(), src.Value())
if err != nil {
return
}
}
err = src.Error()
if err != nil {
return
}
n = w.tw.EntriesLen()
f, err = w.finish()
return
}
// Opens table. It returns a cache handle, which should
// be released after use.
func (t *tOps) open(f *tFile) (ch *cache.Handle, err error) {
ch = t.cache.Get(0, uint64(f.fd.Num), func() (size int, value cache.Value) {
var r storage.Reader
r, err = t.s.stor.Open(f.fd)
if err != nil {
return 0, nil
}
var bcache *cache.NamespaceGetter
if t.bcache != nil {
bcache = &cache.NamespaceGetter{Cache: t.bcache, NS: uint64(f.fd.Num)}
}
var tr *table.Reader
tr, err = table.NewReader(r, f.size, f.fd, bcache, t.bpool, t.s.o.Options)
if err != nil {
r.Close()
return 0, nil
}
return 1, tr
})
if ch == nil && err == nil {
err = ErrClosed
}
return
}
// Finds key/value pair whose key is greater than or equal to the
// given key.
func (t *tOps) find(f *tFile, key []byte, ro *opt.ReadOptions) (rkey, rvalue []byte, err error) {
ch, err := t.open(f)
if err != nil {
return nil, nil, err
}
defer ch.Release()
return ch.Value().(*table.Reader).Find(key, true, ro)
}
// Finds key that is greater than or equal to the given key.
func (t *tOps) findKey(f *tFile, key []byte, ro *opt.ReadOptions) (rkey []byte, err error) {
ch, err := t.open(f)
if err != nil {
return nil, err
}
defer ch.Release()
return ch.Value().(*table.Reader).FindKey(key, true, ro)
}
// Returns approximate offset of the given key.
func (t *tOps) offsetOf(f *tFile, key []byte) (offset int64, err error) {
ch, err := t.open(f)
if err != nil {
return
}
defer ch.Release()
return ch.Value().(*table.Reader).OffsetOf(key)
}
// Creates an iterator from the given table.
func (t *tOps) newIterator(f *tFile, slice *util.Range, ro *opt.ReadOptions) iterator.Iterator {
ch, err := t.open(f)
if err != nil {
return iterator.NewEmptyIterator(err)
}
iter := ch.Value().(*table.Reader).NewIterator(slice, ro)
iter.SetReleaser(ch)
return iter
}
// Removes table from persistent storage. It waits until
// no one use the the table.
func (t *tOps) remove(f *tFile) {
t.cache.Delete(0, uint64(f.fd.Num), func() {
if err := t.s.stor.Remove(f.fd); err != nil {
t.s.logf("table@remove removing @%d %q", f.fd.Num, err)
} else {
t.s.logf("table@remove removed @%d", f.fd.Num)
}
if t.evictRemoved && t.bcache != nil {
t.bcache.EvictNS(uint64(f.fd.Num))
}
})
}
// Closes the table ops instance. It will close all tables,
// regadless still used or not.
func (t *tOps) close() {
t.bpool.Close()
t.cache.Close()
if t.bcache != nil {
t.bcache.CloseWeak()
}
}
// Creates new initialized table ops instance.
func newTableOps(s *session) *tOps {
var (
cacher cache.Cacher
bcache *cache.Cache
bpool *util.BufferPool
)
if s.o.GetOpenFilesCacheCapacity() > 0 {
cacher = cache.NewLRU(s.o.GetOpenFilesCacheCapacity())
}
if !s.o.GetDisableBlockCache() {
var bcacher cache.Cacher
if s.o.GetBlockCacheCapacity() > 0 {
bcacher = s.o.GetBlockCacher().New(s.o.GetBlockCacheCapacity())
}
bcache = cache.NewCache(bcacher)
}
if !s.o.GetDisableBufferPool() {
bpool = util.NewBufferPool(s.o.GetBlockSize() + 5)
}
return &tOps{
s: s,
noSync: s.o.GetNoSync(),
evictRemoved: s.o.GetBlockCacheEvictRemoved(),
cache: cache.NewCache(cacher),
bcache: bcache,
bpool: bpool,
}
}
// tWriter wraps the table writer. It keep track of file descriptor
// and added key range.
type tWriter struct {
t *tOps
fd storage.FileDesc
w storage.Writer
tw *table.Writer
first, last []byte
}
// Append key/value pair to the table.
func (w *tWriter) append(key, value []byte) error {
if w.first == nil {
w.first = append([]byte{}, key...)
}
w.last = append(w.last[:0], key...)
return w.tw.Append(key, value)
}
// Returns true if the table is empty.
func (w *tWriter) empty() bool {
return w.first == nil
}
// Closes the storage.Writer.
func (w *tWriter) close() {
if w.w != nil {
w.w.Close()
w.w = nil
}
}
// Finalizes the table and returns table file.
func (w *tWriter) finish() (f *tFile, err error) {
defer w.close()
err = w.tw.Close()
if err != nil {
return
}
if !w.t.noSync {
err = w.w.Sync()
if err != nil {
return
}
}
f = newTableFile(w.fd, int64(w.tw.BytesLen()), internalKey(w.first), internalKey(w.last))
return
}
// Drops the table.
func (w *tWriter) drop() {
w.close()
w.t.s.stor.Remove(w.fd)
w.t.s.reuseFileNum(w.fd.Num)
w.tw = nil
w.first = nil
w.last = nil
}

1139
vendor/github.com/syndtr/goleveldb/leveldb/table/reader.go generated vendored Normal file
View File

File diff suppressed because it is too large Load Diff

177
vendor/github.com/syndtr/goleveldb/leveldb/table/table.go generated vendored Normal file
View File

@ -0,0 +1,177 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Package table allows read and write sorted key/value.
package table
import (
"encoding/binary"
)
/*
Table:
Table is consist of one or more data blocks, an optional filter block
a metaindex block, an index block and a table footer. Metaindex block
is a special block used to keep parameters of the table, such as filter
block name and its block handle. Index block is a special block used to
keep record of data blocks offset and length, index block use one as
restart interval. The key used by index block are the last key of preceding
block, shorter separator of adjacent blocks or shorter successor of the
last key of the last block. Filter block is an optional block contains
sequence of filter data generated by a filter generator.
Table data structure:
+ optional
/
+--------------+--------------+--------------+------+-------+-----------------+-------------+--------+
| data block 1 | ... | data block n | filter block | metaindex block | index block | footer |
+--------------+--------------+--------------+--------------+-----------------+-------------+--------+
Each block followed by a 5-bytes trailer contains compression type and checksum.
Table block trailer:
+---------------------------+-------------------+
| compression type (1-byte) | checksum (4-byte) |
+---------------------------+-------------------+
The checksum is a CRC-32 computed using Castagnoli's polynomial. Compression
type also included in the checksum.
Table footer:
+------------------- 40-bytes -------------------+
/ \
+------------------------+--------------------+------+-----------------+
| metaindex block handle / index block handle / ---- | magic (8-bytes) |
+------------------------+--------------------+------+-----------------+
The magic are first 64-bit of SHA-1 sum of "http://code.google.com/p/leveldb/".
NOTE: All fixed-length integer are little-endian.
*/
/*
Block:
Block is consist of one or more key/value entries and a block trailer.
Block entry shares key prefix with its preceding key until a restart
point reached. A block should contains at least one restart point.
First restart point are always zero.
Block data structure:
+ restart point + restart point (depends on restart interval)
/ /
+---------------+---------------+---------------+---------------+---------+
| block entry 1 | block entry 2 | ... | block entry n | trailer |
+---------------+---------------+---------------+---------------+---------+
Key/value entry:
+---- key len ----+
/ \
+-------+---------+-----------+---------+--------------------+--------------+----------------+
| shared (varint) | not shared (varint) | value len (varint) | key (varlen) | value (varlen) |
+-----------------+---------------------+--------------------+--------------+----------------+
Block entry shares key prefix with its preceding key:
Conditions:
restart_interval=2
entry one : key=deck,value=v1
entry two : key=dock,value=v2
entry three: key=duck,value=v3
The entries will be encoded as follow:
+ restart point (offset=0) + restart point (offset=16)
/ /
+-----+-----+-----+----------+--------+-----+-----+-----+---------+--------+-----+-----+-----+----------+--------+
| 0 | 4 | 2 | "deck" | "v1" | 1 | 3 | 2 | "ock" | "v2" | 0 | 4 | 2 | "duck" | "v3" |
+-----+-----+-----+----------+--------+-----+-----+-----+---------+--------+-----+-----+-----+----------+--------+
\ / \ / \ /
+----------- entry one -----------+ +----------- entry two ----------+ +---------- entry three ----------+
The block trailer will contains two restart points:
+------------+-----------+--------+
| 0 | 16 | 2 |
+------------+-----------+---+----+
\ / \
+-- restart points --+ + restart points length
Block trailer:
+-- 4-bytes --+
/ \
+-----------------+-----------------+-----------------+------------------------------+
| restart point 1 | .... | restart point n | restart points len (4-bytes) |
+-----------------+-----------------+-----------------+------------------------------+
NOTE: All fixed-length integer are little-endian.
*/
/*
Filter block:
Filter block consist of one or more filter data and a filter block trailer.
The trailer contains filter data offsets, a trailer offset and a 1-byte base Lg.
Filter block data structure:
+ offset 1 + offset 2 + offset n + trailer offset
/ / / /
+---------------+---------------+---------------+---------+
| filter data 1 | ... | filter data n | trailer |
+---------------+---------------+---------------+---------+
Filter block trailer:
+- 4-bytes -+
/ \
+---------------+---------------+---------------+-------------------------------+------------------+
| data 1 offset | .... | data n offset | data-offsets offset (4-bytes) | base Lg (1-byte) |
+-------------- +---------------+---------------+-------------------------------+------------------+
NOTE: All fixed-length integer are little-endian.
*/
const (
blockTrailerLen = 5
footerLen = 48
magic = "\x57\xfb\x80\x8b\x24\x75\x47\xdb"
// The block type gives the per-block compression format.
// These constants are part of the file format and should not be changed.
blockTypeNoCompression = 0
blockTypeSnappyCompression = 1
// Generate new filter every 2KB of data
filterBaseLg = 11
filterBase = 1 << filterBaseLg
)
type blockHandle struct {
offset, length uint64
}
func decodeBlockHandle(src []byte) (blockHandle, int) {
offset, n := binary.Uvarint(src)
length, m := binary.Uvarint(src[n:])
if n == 0 || m == 0 {
return blockHandle{}, 0
}
return blockHandle{offset, length}, n + m
}
func encodeBlockHandle(dst []byte, b blockHandle) int {
n := binary.PutUvarint(dst, b.offset)
m := binary.PutUvarint(dst[n:], b.length)
return n + m
}

375
vendor/github.com/syndtr/goleveldb/leveldb/table/writer.go generated vendored Normal file
View File

@ -0,0 +1,375 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package table
import (
"encoding/binary"
"errors"
"fmt"
"io"
"github.com/golang/snappy"
"github.com/syndtr/goleveldb/leveldb/comparer"
"github.com/syndtr/goleveldb/leveldb/filter"
"github.com/syndtr/goleveldb/leveldb/opt"
"github.com/syndtr/goleveldb/leveldb/util"
)
func sharedPrefixLen(a, b []byte) int {
i, n := 0, len(a)
if n > len(b) {
n = len(b)
}
for i < n && a[i] == b[i] {
i++
}
return i
}
type blockWriter struct {
restartInterval int
buf util.Buffer
nEntries int
prevKey []byte
restarts []uint32
scratch []byte
}
func (w *blockWriter) append(key, value []byte) {
nShared := 0
if w.nEntries%w.restartInterval == 0 {
w.restarts = append(w.restarts, uint32(w.buf.Len()))
} else {
nShared = sharedPrefixLen(w.prevKey, key)
}
n := binary.PutUvarint(w.scratch[0:], uint64(nShared))
n += binary.PutUvarint(w.scratch[n:], uint64(len(key)-nShared))
n += binary.PutUvarint(w.scratch[n:], uint64(len(value)))
w.buf.Write(w.scratch[:n])
w.buf.Write(key[nShared:])
w.buf.Write(value)
w.prevKey = append(w.prevKey[:0], key...)
w.nEntries++
}
func (w *blockWriter) finish() {
// Write restarts entry.
if w.nEntries == 0 {
// Must have at least one restart entry.
w.restarts = append(w.restarts, 0)
}
w.restarts = append(w.restarts, uint32(len(w.restarts)))
for _, x := range w.restarts {
buf4 := w.buf.Alloc(4)
binary.LittleEndian.PutUint32(buf4, x)
}
}
func (w *blockWriter) reset() {
w.buf.Reset()
w.nEntries = 0
w.restarts = w.restarts[:0]
}
func (w *blockWriter) bytesLen() int {
restartsLen := len(w.restarts)
if restartsLen == 0 {
restartsLen = 1
}
return w.buf.Len() + 4*restartsLen + 4
}
type filterWriter struct {
generator filter.FilterGenerator
buf util.Buffer
nKeys int
offsets []uint32
}
func (w *filterWriter) add(key []byte) {
if w.generator == nil {
return
}
w.generator.Add(key)
w.nKeys++
}
func (w *filterWriter) flush(offset uint64) {
if w.generator == nil {
return
}
for x := int(offset / filterBase); x > len(w.offsets); {
w.generate()
}
}
func (w *filterWriter) finish() {
if w.generator == nil {
return
}
// Generate last keys.
if w.nKeys > 0 {
w.generate()
}
w.offsets = append(w.offsets, uint32(w.buf.Len()))
for _, x := range w.offsets {
buf4 := w.buf.Alloc(4)
binary.LittleEndian.PutUint32(buf4, x)
}
w.buf.WriteByte(filterBaseLg)
}
func (w *filterWriter) generate() {
// Record offset.
w.offsets = append(w.offsets, uint32(w.buf.Len()))
// Generate filters.
if w.nKeys > 0 {
w.generator.Generate(&w.buf)
w.nKeys = 0
}
}
// Writer is a table writer.
type Writer struct {
writer io.Writer
err error
// Options
cmp comparer.Comparer
filter filter.Filter
compression opt.Compression
blockSize int
dataBlock blockWriter
indexBlock blockWriter
filterBlock filterWriter
pendingBH blockHandle
offset uint64
nEntries int
// Scratch allocated enough for 5 uvarint. Block writer should not use
// first 20-bytes since it will be used to encode block handle, which
// then passed to the block writer itself.
scratch [50]byte
comparerScratch []byte
compressionScratch []byte
}
func (w *Writer) writeBlock(buf *util.Buffer, compression opt.Compression) (bh blockHandle, err error) {
// Compress the buffer if necessary.
var b []byte
if compression == opt.SnappyCompression {
// Allocate scratch enough for compression and block trailer.
if n := snappy.MaxEncodedLen(buf.Len()) + blockTrailerLen; len(w.compressionScratch) < n {
w.compressionScratch = make([]byte, n)
}
compressed := snappy.Encode(w.compressionScratch, buf.Bytes())
n := len(compressed)
b = compressed[:n+blockTrailerLen]
b[n] = blockTypeSnappyCompression
} else {
tmp := buf.Alloc(blockTrailerLen)
tmp[0] = blockTypeNoCompression
b = buf.Bytes()
}
// Calculate the checksum.
n := len(b) - 4
checksum := util.NewCRC(b[:n]).Value()
binary.LittleEndian.PutUint32(b[n:], checksum)
// Write the buffer to the file.
_, err = w.writer.Write(b)
if err != nil {
return
}
bh = blockHandle{w.offset, uint64(len(b) - blockTrailerLen)}
w.offset += uint64(len(b))
return
}
func (w *Writer) flushPendingBH(key []byte) {
if w.pendingBH.length == 0 {
return
}
var separator []byte
if len(key) == 0 {
separator = w.cmp.Successor(w.comparerScratch[:0], w.dataBlock.prevKey)
} else {
separator = w.cmp.Separator(w.comparerScratch[:0], w.dataBlock.prevKey, key)
}
if separator == nil {
separator = w.dataBlock.prevKey
} else {
w.comparerScratch = separator
}
n := encodeBlockHandle(w.scratch[:20], w.pendingBH)
// Append the block handle to the index block.
w.indexBlock.append(separator, w.scratch[:n])
// Reset prev key of the data block.
w.dataBlock.prevKey = w.dataBlock.prevKey[:0]
// Clear pending block handle.
w.pendingBH = blockHandle{}
}
func (w *Writer) finishBlock() error {
w.dataBlock.finish()
bh, err := w.writeBlock(&w.dataBlock.buf, w.compression)
if err != nil {
return err
}
w.pendingBH = bh
// Reset the data block.
w.dataBlock.reset()
// Flush the filter block.
w.filterBlock.flush(w.offset)
return nil
}
// Append appends key/value pair to the table. The keys passed must
// be in increasing order.
//
// It is safe to modify the contents of the arguments after Append returns.
func (w *Writer) Append(key, value []byte) error {
if w.err != nil {
return w.err
}
if w.nEntries > 0 && w.cmp.Compare(w.dataBlock.prevKey, key) >= 0 {
w.err = fmt.Errorf("leveldb/table: Writer: keys are not in increasing order: %q, %q", w.dataBlock.prevKey, key)
return w.err
}
w.flushPendingBH(key)
// Append key/value pair to the data block.
w.dataBlock.append(key, value)
// Add key to the filter block.
w.filterBlock.add(key)
// Finish the data block if block size target reached.
if w.dataBlock.bytesLen() >= w.blockSize {
if err := w.finishBlock(); err != nil {
w.err = err
return w.err
}
}
w.nEntries++
return nil
}
// BlocksLen returns number of blocks written so far.
func (w *Writer) BlocksLen() int {
n := w.indexBlock.nEntries
if w.pendingBH.length > 0 {
// Includes the pending block.
n++
}
return n
}
// EntriesLen returns number of entries added so far.
func (w *Writer) EntriesLen() int {
return w.nEntries
}
// BytesLen returns number of bytes written so far.
func (w *Writer) BytesLen() int {
return int(w.offset)
}
// Close will finalize the table. Calling Append is not possible
// after Close, but calling BlocksLen, EntriesLen and BytesLen
// is still possible.
func (w *Writer) Close() error {
if w.err != nil {
return w.err
}
// Write the last data block. Or empty data block if there
// aren't any data blocks at all.
if w.dataBlock.nEntries > 0 || w.nEntries == 0 {
if err := w.finishBlock(); err != nil {
w.err = err
return w.err
}
}
w.flushPendingBH(nil)
// Write the filter block.
var filterBH blockHandle
w.filterBlock.finish()
if buf := &w.filterBlock.buf; buf.Len() > 0 {
filterBH, w.err = w.writeBlock(buf, opt.NoCompression)
if w.err != nil {
return w.err
}
}
// Write the metaindex block.
if filterBH.length > 0 {
key := []byte("filter." + w.filter.Name())
n := encodeBlockHandle(w.scratch[:20], filterBH)
w.dataBlock.append(key, w.scratch[:n])
}
w.dataBlock.finish()
metaindexBH, err := w.writeBlock(&w.dataBlock.buf, w.compression)
if err != nil {
w.err = err
return w.err
}
// Write the index block.
w.indexBlock.finish()
indexBH, err := w.writeBlock(&w.indexBlock.buf, w.compression)
if err != nil {
w.err = err
return w.err
}
// Write the table footer.
footer := w.scratch[:footerLen]
for i := range footer {
footer[i] = 0
}
n := encodeBlockHandle(footer, metaindexBH)
encodeBlockHandle(footer[n:], indexBH)
copy(footer[footerLen-len(magic):], magic)
if _, err := w.writer.Write(footer); err != nil {
w.err = err
return w.err
}
w.offset += footerLen
w.err = errors.New("leveldb/table: writer is closed")
return nil
}
// NewWriter creates a new initialized table writer for the file.
//
// Table writer is not safe for concurrent use.
func NewWriter(f io.Writer, o *opt.Options) *Writer {
w := &Writer{
writer: f,
cmp: o.GetComparer(),
filter: o.GetFilter(),
compression: o.GetCompression(),
blockSize: o.GetBlockSize(),
comparerScratch: make([]byte, 0),
}
// data block
w.dataBlock.restartInterval = o.GetBlockRestartInterval()
// The first 20-bytes are used for encoding block handle.
w.dataBlock.scratch = w.scratch[20:]
// index block
w.indexBlock.restartInterval = 1
w.indexBlock.scratch = w.scratch[20:]
// filter block
if w.filter != nil {
w.filterBlock.generator = w.filter.NewGenerator()
w.filterBlock.flush(0)
}
return w
}

98
vendor/github.com/syndtr/goleveldb/leveldb/util.go generated vendored Normal file
View File

@ -0,0 +1,98 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package leveldb
import (
"fmt"
"sort"
"github.com/syndtr/goleveldb/leveldb/storage"
)
func shorten(str string) string {
if len(str) <= 8 {
return str
}
return str[:3] + ".." + str[len(str)-3:]
}
var bunits = [...]string{"", "Ki", "Mi", "Gi", "Ti"}
func shortenb(bytes int) string {
i := 0
for ; bytes > 1024 && i < 4; i++ {
bytes /= 1024
}
return fmt.Sprintf("%d%sB", bytes, bunits[i])
}
func sshortenb(bytes int) string {
if bytes == 0 {
return "~"
}
sign := "+"
if bytes < 0 {
sign = "-"
bytes *= -1
}
i := 0
for ; bytes > 1024 && i < 4; i++ {
bytes /= 1024
}
return fmt.Sprintf("%s%d%sB", sign, bytes, bunits[i])
}
func sint(x int) string {
if x == 0 {
return "~"
}
sign := "+"
if x < 0 {
sign = "-"
x *= -1
}
return fmt.Sprintf("%s%d", sign, x)
}
func minInt(a, b int) int {
if a < b {
return a
}
return b
}
func maxInt(a, b int) int {
if a > b {
return a
}
return b
}
type fdSorter []storage.FileDesc
func (p fdSorter) Len() int {
return len(p)
}
func (p fdSorter) Less(i, j int) bool {
return p[i].Num < p[j].Num
}
func (p fdSorter) Swap(i, j int) {
p[i], p[j] = p[j], p[i]
}
func sortFds(fds []storage.FileDesc) {
sort.Sort(fdSorter(fds))
}
func ensureBuffer(b []byte, n int) []byte {
if cap(b) < n {
return make([]byte, n)
}
return b[:n]
}

293
vendor/github.com/syndtr/goleveldb/leveldb/util/buffer.go generated vendored Normal file
View File

@ -0,0 +1,293 @@
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package util
// This a copy of Go std bytes.Buffer with some modification
// and some features stripped.
import (
"bytes"
"io"
)
// A Buffer is a variable-sized buffer of bytes with Read and Write methods.
// The zero value for Buffer is an empty buffer ready to use.
type Buffer struct {
buf []byte // contents are the bytes buf[off : len(buf)]
off int // read at &buf[off], write at &buf[len(buf)]
bootstrap [64]byte // memory to hold first slice; helps small buffers (Printf) avoid allocation.
}
// Bytes returns a slice of the contents of the unread portion of the buffer;
// len(b.Bytes()) == b.Len(). If the caller changes the contents of the
// returned slice, the contents of the buffer will change provided there
// are no intervening method calls on the Buffer.
func (b *Buffer) Bytes() []byte { return b.buf[b.off:] }
// String returns the contents of the unread portion of the buffer
// as a string. If the Buffer is a nil pointer, it returns "<nil>".
func (b *Buffer) String() string {
if b == nil {
// Special case, useful in debugging.
return "<nil>"
}
return string(b.buf[b.off:])
}
// Len returns the number of bytes of the unread portion of the buffer;
// b.Len() == len(b.Bytes()).
func (b *Buffer) Len() int { return len(b.buf) - b.off }
// Truncate discards all but the first n unread bytes from the buffer.
// It panics if n is negative or greater than the length of the buffer.
func (b *Buffer) Truncate(n int) {
switch {
case n < 0 || n > b.Len():
panic("leveldb/util.Buffer: truncation out of range")
case n == 0:
// Reuse buffer space.
b.off = 0
}
b.buf = b.buf[0 : b.off+n]
}
// Reset resets the buffer so it has no content.
// b.Reset() is the same as b.Truncate(0).
func (b *Buffer) Reset() { b.Truncate(0) }
// grow grows the buffer to guarantee space for n more bytes.
// It returns the index where bytes should be written.
// If the buffer can't grow it will panic with bytes.ErrTooLarge.
func (b *Buffer) grow(n int) int {
m := b.Len()
// If buffer is empty, reset to recover space.
if m == 0 && b.off != 0 {
b.Truncate(0)
}
if len(b.buf)+n > cap(b.buf) {
var buf []byte
if b.buf == nil && n <= len(b.bootstrap) {
buf = b.bootstrap[0:]
} else if m+n <= cap(b.buf)/2 {
// We can slide things down instead of allocating a new
// slice. We only need m+n <= cap(b.buf) to slide, but
// we instead let capacity get twice as large so we
// don't spend all our time copying.
copy(b.buf[:], b.buf[b.off:])
buf = b.buf[:m]
} else {
// not enough space anywhere
buf = makeSlice(2*cap(b.buf) + n)
copy(buf, b.buf[b.off:])
}
b.buf = buf
b.off = 0
}
b.buf = b.buf[0 : b.off+m+n]
return b.off + m
}
// Alloc allocs n bytes of slice from the buffer, growing the buffer as
// needed. If n is negative, Alloc will panic.
// If the buffer can't grow it will panic with bytes.ErrTooLarge.
func (b *Buffer) Alloc(n int) []byte {
if n < 0 {
panic("leveldb/util.Buffer.Alloc: negative count")
}
m := b.grow(n)
return b.buf[m:]
}
// Grow grows the buffer's capacity, if necessary, to guarantee space for
// another n bytes. After Grow(n), at least n bytes can be written to the
// buffer without another allocation.
// If n is negative, Grow will panic.
// If the buffer can't grow it will panic with bytes.ErrTooLarge.
func (b *Buffer) Grow(n int) {
if n < 0 {
panic("leveldb/util.Buffer.Grow: negative count")
}
m := b.grow(n)
b.buf = b.buf[0:m]
}
// Write appends the contents of p to the buffer, growing the buffer as
// needed. The return value n is the length of p; err is always nil. If the
// buffer becomes too large, Write will panic with bytes.ErrTooLarge.
func (b *Buffer) Write(p []byte) (n int, err error) {
m := b.grow(len(p))
return copy(b.buf[m:], p), nil
}
// MinRead is the minimum slice size passed to a Read call by
// Buffer.ReadFrom. As long as the Buffer has at least MinRead bytes beyond
// what is required to hold the contents of r, ReadFrom will not grow the
// underlying buffer.
const MinRead = 512
// ReadFrom reads data from r until EOF and appends it to the buffer, growing
// the buffer as needed. The return value n is the number of bytes read. Any
// error except io.EOF encountered during the read is also returned. If the
// buffer becomes too large, ReadFrom will panic with bytes.ErrTooLarge.
func (b *Buffer) ReadFrom(r io.Reader) (n int64, err error) {
// If buffer is empty, reset to recover space.
if b.off >= len(b.buf) {
b.Truncate(0)
}
for {
if free := cap(b.buf) - len(b.buf); free < MinRead {
// not enough space at end
newBuf := b.buf
if b.off+free < MinRead {
// not enough space using beginning of buffer;
// double buffer capacity
newBuf = makeSlice(2*cap(b.buf) + MinRead)
}
copy(newBuf, b.buf[b.off:])
b.buf = newBuf[:len(b.buf)-b.off]
b.off = 0
}
m, e := r.Read(b.buf[len(b.buf):cap(b.buf)])
b.buf = b.buf[0 : len(b.buf)+m]
n += int64(m)
if e == io.EOF {
break
}
if e != nil {
return n, e
}
}
return n, nil // err is EOF, so return nil explicitly
}
// makeSlice allocates a slice of size n. If the allocation fails, it panics
// with bytes.ErrTooLarge.
func makeSlice(n int) []byte {
// If the make fails, give a known error.
defer func() {
if recover() != nil {
panic(bytes.ErrTooLarge)
}
}()
return make([]byte, n)
}
// WriteTo writes data to w until the buffer is drained or an error occurs.
// The return value n is the number of bytes written; it always fits into an
// int, but it is int64 to match the io.WriterTo interface. Any error
// encountered during the write is also returned.
func (b *Buffer) WriteTo(w io.Writer) (n int64, err error) {
if b.off < len(b.buf) {
nBytes := b.Len()
m, e := w.Write(b.buf[b.off:])
if m > nBytes {
panic("leveldb/util.Buffer.WriteTo: invalid Write count")
}
b.off += m
n = int64(m)
if e != nil {
return n, e
}
// all bytes should have been written, by definition of
// Write method in io.Writer
if m != nBytes {
return n, io.ErrShortWrite
}
}
// Buffer is now empty; reset.
b.Truncate(0)
return
}
// WriteByte appends the byte c to the buffer, growing the buffer as needed.
// The returned error is always nil, but is included to match bufio.Writer's
// WriteByte. If the buffer becomes too large, WriteByte will panic with
// bytes.ErrTooLarge.
func (b *Buffer) WriteByte(c byte) error {
m := b.grow(1)
b.buf[m] = c
return nil
}
// Read reads the next len(p) bytes from the buffer or until the buffer
// is drained. The return value n is the number of bytes read. If the
// buffer has no data to return, err is io.EOF (unless len(p) is zero);
// otherwise it is nil.
func (b *Buffer) Read(p []byte) (n int, err error) {
if b.off >= len(b.buf) {
// Buffer is empty, reset to recover space.
b.Truncate(0)
if len(p) == 0 {
return
}
return 0, io.EOF
}
n = copy(p, b.buf[b.off:])
b.off += n
return
}
// Next returns a slice containing the next n bytes from the buffer,
// advancing the buffer as if the bytes had been returned by Read.
// If there are fewer than n bytes in the buffer, Next returns the entire buffer.
// The slice is only valid until the next call to a read or write method.
func (b *Buffer) Next(n int) []byte {
m := b.Len()
if n > m {
n = m
}
data := b.buf[b.off : b.off+n]
b.off += n
return data
}
// ReadByte reads and returns the next byte from the buffer.
// If no byte is available, it returns error io.EOF.
func (b *Buffer) ReadByte() (c byte, err error) {
if b.off >= len(b.buf) {
// Buffer is empty, reset to recover space.
b.Truncate(0)
return 0, io.EOF
}
c = b.buf[b.off]
b.off++
return c, nil
}
// ReadBytes reads until the first occurrence of delim in the input,
// returning a slice containing the data up to and including the delimiter.
// If ReadBytes encounters an error before finding a delimiter,
// it returns the data read before the error and the error itself (often io.EOF).
// ReadBytes returns err != nil if and only if the returned data does not end in
// delim.
func (b *Buffer) ReadBytes(delim byte) (line []byte, err error) {
slice, err := b.readSlice(delim)
// return a copy of slice. The buffer's backing array may
// be overwritten by later calls.
line = append(line, slice...)
return
}
// readSlice is like ReadBytes but returns a reference to internal buffer data.
func (b *Buffer) readSlice(delim byte) (line []byte, err error) {
i := bytes.IndexByte(b.buf[b.off:], delim)
end := b.off + i + 1
if i < 0 {
end = len(b.buf)
err = io.EOF
}
line = b.buf[b.off:end]
b.off = end
return line, err
}
// NewBuffer creates and initializes a new Buffer using buf as its initial
// contents. It is intended to prepare a Buffer to read existing data. It
// can also be used to size the internal buffer for writing. To do that,
// buf should have the desired capacity but a length of zero.
//
// In most cases, new(Buffer) (or just declaring a Buffer variable) is
// sufficient to initialize a Buffer.
func NewBuffer(buf []byte) *Buffer { return &Buffer{buf: buf} }

239
vendor/github.com/syndtr/goleveldb/leveldb/util/buffer_pool.go generated vendored Normal file
View File

@ -0,0 +1,239 @@
// Copyright (c) 2014, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package util
import (
"fmt"
"sync"
"sync/atomic"
"time"
)
type buffer struct {
b []byte
miss int
}
// BufferPool is a 'buffer pool'.
type BufferPool struct {
pool [6]chan []byte
size [5]uint32
sizeMiss [5]uint32
sizeHalf [5]uint32
baseline [4]int
baseline0 int
mu sync.RWMutex
closed bool
closeC chan struct{}
get uint32
put uint32
half uint32
less uint32
equal uint32
greater uint32
miss uint32
}
func (p *BufferPool) poolNum(n int) int {
if n <= p.baseline0 && n > p.baseline0/2 {
return 0
}
for i, x := range p.baseline {
if n <= x {
return i + 1
}
}
return len(p.baseline) + 1
}
// Get returns buffer with length of n.
func (p *BufferPool) Get(n int) []byte {
if p == nil {
return make([]byte, n)
}
p.mu.RLock()
defer p.mu.RUnlock()
if p.closed {
return make([]byte, n)
}
atomic.AddUint32(&p.get, 1)
poolNum := p.poolNum(n)
pool := p.pool[poolNum]
if poolNum == 0 {
// Fast path.
select {
case b := <-pool:
switch {
case cap(b) > n:
if cap(b)-n >= n {
atomic.AddUint32(&p.half, 1)
select {
case pool <- b:
default:
}
return make([]byte, n)
} else {
atomic.AddUint32(&p.less, 1)
return b[:n]
}
case cap(b) == n:
atomic.AddUint32(&p.equal, 1)
return b[:n]
default:
atomic.AddUint32(&p.greater, 1)
}
default:
atomic.AddUint32(&p.miss, 1)
}
return make([]byte, n, p.baseline0)
} else {
sizePtr := &p.size[poolNum-1]
select {
case b := <-pool:
switch {
case cap(b) > n:
if cap(b)-n >= n {
atomic.AddUint32(&p.half, 1)
sizeHalfPtr := &p.sizeHalf[poolNum-1]
if atomic.AddUint32(sizeHalfPtr, 1) == 20 {
atomic.StoreUint32(sizePtr, uint32(cap(b)/2))
atomic.StoreUint32(sizeHalfPtr, 0)
} else {
select {
case pool <- b:
default:
}
}
return make([]byte, n)
} else {
atomic.AddUint32(&p.less, 1)
return b[:n]
}
case cap(b) == n:
atomic.AddUint32(&p.equal, 1)
return b[:n]
default:
atomic.AddUint32(&p.greater, 1)
if uint32(cap(b)) >= atomic.LoadUint32(sizePtr) {
select {
case pool <- b:
default:
}
}
}
default:
atomic.AddUint32(&p.miss, 1)
}
if size := atomic.LoadUint32(sizePtr); uint32(n) > size {
if size == 0 {
atomic.CompareAndSwapUint32(sizePtr, 0, uint32(n))
} else {
sizeMissPtr := &p.sizeMiss[poolNum-1]
if atomic.AddUint32(sizeMissPtr, 1) == 20 {
atomic.StoreUint32(sizePtr, uint32(n))
atomic.StoreUint32(sizeMissPtr, 0)
}
}
return make([]byte, n)
} else {
return make([]byte, n, size)
}
}
}
// Put adds given buffer to the pool.
func (p *BufferPool) Put(b []byte) {
if p == nil {
return
}
p.mu.RLock()
defer p.mu.RUnlock()
if p.closed {
return
}
atomic.AddUint32(&p.put, 1)
pool := p.pool[p.poolNum(cap(b))]
select {
case pool <- b:
default:
}
}
func (p *BufferPool) Close() {
if p == nil {
return
}
p.mu.Lock()
if !p.closed {
p.closed = true
p.closeC <- struct{}{}
}
p.mu.Unlock()
}
func (p *BufferPool) String() string {
if p == nil {
return "<nil>"
}
return fmt.Sprintf("BufferPool{B·%d Z·%v Zm·%v Zh·%v G·%d P·%d H·%d <·%d =·%d >·%d M·%d}",
p.baseline0, p.size, p.sizeMiss, p.sizeHalf, p.get, p.put, p.half, p.less, p.equal, p.greater, p.miss)
}
func (p *BufferPool) drain() {
ticker := time.NewTicker(2 * time.Second)
defer ticker.Stop()
for {
select {
case <-ticker.C:
for _, ch := range p.pool {
select {
case <-ch:
default:
}
}
case <-p.closeC:
close(p.closeC)
for _, ch := range p.pool {
close(ch)
}
return
}
}
}
// NewBufferPool creates a new initialized 'buffer pool'.
func NewBufferPool(baseline int) *BufferPool {
if baseline <= 0 {
panic("baseline can't be <= 0")
}
p := &BufferPool{
baseline0: baseline,
baseline: [...]int{baseline / 4, baseline / 2, baseline * 2, baseline * 4},
closeC: make(chan struct{}, 1),
}
for i, cap := range []int{2, 2, 4, 4, 2, 1} {
p.pool[i] = make(chan []byte, cap)
}
go p.drain()
return p
}

30
vendor/github.com/syndtr/goleveldb/leveldb/util/crc32.go generated vendored Normal file
View File

@ -0,0 +1,30 @@
// Copyright 2011 The LevelDB-Go Authors. All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package util
import (
"hash/crc32"
)
var table = crc32.MakeTable(crc32.Castagnoli)
// CRC is a CRC-32 checksum computed using Castagnoli's polynomial.
type CRC uint32
// NewCRC creates a new crc based on the given bytes.
func NewCRC(b []byte) CRC {
return CRC(0).Update(b)
}
// Update updates the crc with the given bytes.
func (c CRC) Update(b []byte) CRC {
return CRC(crc32.Update(uint32(c), table, b))
}
// Value returns a masked crc.
func (c CRC) Value() uint32 {
return uint32(c>>15|c<<17) + 0xa282ead8
}

48
vendor/github.com/syndtr/goleveldb/leveldb/util/hash.go generated vendored Normal file
View File

@ -0,0 +1,48 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package util
import (
"encoding/binary"
)
// Hash return hash of the given data.
func Hash(data []byte, seed uint32) uint32 {
// Similar to murmur hash
const (
m = uint32(0xc6a4a793)
r = uint32(24)
)
var (
h = seed ^ (uint32(len(data)) * m)
i int
)
for n := len(data) - len(data)%4; i < n; i += 4 {
h += binary.LittleEndian.Uint32(data[i:])
h *= m
h ^= (h >> 16)
}
switch len(data) - i {
default:
panic("not reached")
case 3:
h += uint32(data[i+2]) << 16
fallthrough
case 2:
h += uint32(data[i+1]) << 8
fallthrough
case 1:
h += uint32(data[i])
h *= m
h ^= (h >> r)
case 0:
}
return h
}

32
vendor/github.com/syndtr/goleveldb/leveldb/util/range.go generated vendored Normal file
View File

@ -0,0 +1,32 @@
// Copyright (c) 2014, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package util
// Range is a key range.
type Range struct {
// Start of the key range, include in the range.
Start []byte
// Limit of the key range, not include in the range.
Limit []byte
}
// BytesPrefix returns key range that satisfy the given prefix.
// This only applicable for the standard 'bytes comparer'.
func BytesPrefix(prefix []byte) *Range {
var limit []byte
for i := len(prefix) - 1; i >= 0; i-- {
c := prefix[i]
if c < 0xff {
limit = make([]byte, i+1)
copy(limit, prefix)
limit[i] = c + 1
break
}
}
return &Range{prefix, limit}
}

73
vendor/github.com/syndtr/goleveldb/leveldb/util/util.go generated vendored Normal file
View File

@ -0,0 +1,73 @@
// Copyright (c) 2013, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Package util provides utilities used throughout leveldb.
package util
import (
"errors"
)
var (
ErrReleased = errors.New("leveldb: resource already relesed")
ErrHasReleaser = errors.New("leveldb: releaser already defined")
)
// Releaser is the interface that wraps the basic Release method.
type Releaser interface {
// Release releases associated resources. Release should always success
// and can be called multiple times without causing error.
Release()
}
// ReleaseSetter is the interface that wraps the basic SetReleaser method.
type ReleaseSetter interface {
// SetReleaser associates the given releaser to the resources. The
// releaser will be called once coresponding resources released.
// Calling SetReleaser with nil will clear the releaser.
//
// This will panic if a releaser already present or coresponding
// resource is already released. Releaser should be cleared first
// before assigned a new one.
SetReleaser(releaser Releaser)
}
// BasicReleaser provides basic implementation of Releaser and ReleaseSetter.
type BasicReleaser struct {
releaser Releaser
released bool
}
// Released returns whether Release method already called.
func (r *BasicReleaser) Released() bool {
return r.released
}
// Release implements Releaser.Release.
func (r *BasicReleaser) Release() {
if !r.released {
if r.releaser != nil {
r.releaser.Release()
r.releaser = nil
}
r.released = true
}
}
// SetReleaser implements ReleaseSetter.SetReleaser.
func (r *BasicReleaser) SetReleaser(releaser Releaser) {
if r.released {
panic(ErrReleased)
}
if r.releaser != nil && releaser != nil {
panic(ErrHasReleaser)
}
r.releaser = releaser
}
type NoopReleaser struct{}
func (NoopReleaser) Release() {}

528
vendor/github.com/syndtr/goleveldb/leveldb/version.go generated vendored Normal file
View File

@ -0,0 +1,528 @@
// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package leveldb
import (
"fmt"
"sync/atomic"
"unsafe"
"github.com/syndtr/goleveldb/leveldb/iterator"
"github.com/syndtr/goleveldb/leveldb/opt"
"github.com/syndtr/goleveldb/leveldb/util"
)
type tSet struct {
level int
table *tFile
}
type version struct {
s *session
levels []tFiles
// Level that should be compacted next and its compaction score.
// Score < 1 means compaction is not strictly needed. These fields
// are initialized by computeCompaction()
cLevel int
cScore float64
cSeek unsafe.Pointer
closing bool
ref int
released bool
}
func newVersion(s *session) *version {
return &version{s: s}
}
func (v *version) incref() {
if v.released {
panic("already released")
}
v.ref++
if v.ref == 1 {
// Incr file ref.
for _, tt := range v.levels {
for _, t := range tt {
v.s.addFileRef(t.fd, 1)
}
}
}
}
func (v *version) releaseNB() {
v.ref--
if v.ref > 0 {
return
} else if v.ref < 0 {
panic("negative version ref")
}
for _, tt := range v.levels {
for _, t := range tt {
if v.s.addFileRef(t.fd, -1) == 0 {
v.s.tops.remove(t)
}
}
}
v.released = true
}
func (v *version) release() {
v.s.vmu.Lock()
v.releaseNB()
v.s.vmu.Unlock()
}
func (v *version) walkOverlapping(aux tFiles, ikey internalKey, f func(level int, t *tFile) bool, lf func(level int) bool) {
ukey := ikey.ukey()
// Aux level.
if aux != nil {
for _, t := range aux {
if t.overlaps(v.s.icmp, ukey, ukey) {
if !f(-1, t) {
return
}
}
}
if lf != nil && !lf(-1) {
return
}
}
// Walk tables level-by-level.
for level, tables := range v.levels {
if len(tables) == 0 {
continue
}
if level == 0 {
// Level-0 files may overlap each other. Find all files that
// overlap ukey.
for _, t := range tables {
if t.overlaps(v.s.icmp, ukey, ukey) {
if !f(level, t) {
return
}
}
}
} else {
if i := tables.searchMax(v.s.icmp, ikey); i < len(tables) {
t := tables[i]
if v.s.icmp.uCompare(ukey, t.imin.ukey()) >= 0 {
if !f(level, t) {
return
}
}
}
}
if lf != nil && !lf(level) {
return
}
}
}
func (v *version) get(aux tFiles, ikey internalKey, ro *opt.ReadOptions, noValue bool) (value []byte, tcomp bool, err error) {
if v.closing {
return nil, false, ErrClosed
}
ukey := ikey.ukey()
var (
tset *tSet
tseek bool
// Level-0.
zfound bool
zseq uint64
zkt keyType
zval []byte
)
err = ErrNotFound
// Since entries never hop across level, finding key/value
// in smaller level make later levels irrelevant.
v.walkOverlapping(aux, ikey, func(level int, t *tFile) bool {
if level >= 0 && !tseek {
if tset == nil {
tset = &tSet{level, t}
} else {
tseek = true
}
}
var (
fikey, fval []byte
ferr error
)
if noValue {
fikey, ferr = v.s.tops.findKey(t, ikey, ro)
} else {
fikey, fval, ferr = v.s.tops.find(t, ikey, ro)
}
switch ferr {
case nil:
case ErrNotFound:
return true
default:
err = ferr
return false
}
if fukey, fseq, fkt, fkerr := parseInternalKey(fikey); fkerr == nil {
if v.s.icmp.uCompare(ukey, fukey) == 0 {
// Level <= 0 may overlaps each-other.
if level <= 0 {
if fseq >= zseq {
zfound = true
zseq = fseq
zkt = fkt
zval = fval
}
} else {
switch fkt {
case keyTypeVal:
value = fval
err = nil
case keyTypeDel:
default:
panic("leveldb: invalid internalKey type")
}
return false
}
}
} else {
err = fkerr
return false
}
return true
}, func(level int) bool {
if zfound {
switch zkt {
case keyTypeVal:
value = zval
err = nil
case keyTypeDel:
default:
panic("leveldb: invalid internalKey type")
}
return false
}
return true
})
if tseek && tset.table.consumeSeek() <= 0 {
tcomp = atomic.CompareAndSwapPointer(&v.cSeek, nil, unsafe.Pointer(tset))
}
return
}
func (v *version) sampleSeek(ikey internalKey) (tcomp bool) {
var tset *tSet
v.walkOverlapping(nil, ikey, func(level int, t *tFile) bool {
if tset == nil {
tset = &tSet{level, t}
return true
}
if tset.table.consumeSeek() <= 0 {
tcomp = atomic.CompareAndSwapPointer(&v.cSeek, nil, unsafe.Pointer(tset))
}
return false
}, nil)
return
}
func (v *version) getIterators(slice *util.Range, ro *opt.ReadOptions) (its []iterator.Iterator) {
strict := opt.GetStrict(v.s.o.Options, ro, opt.StrictReader)
for level, tables := range v.levels {
if level == 0 {
// Merge all level zero files together since they may overlap.
for _, t := range tables {
its = append(its, v.s.tops.newIterator(t, slice, ro))
}
} else if len(tables) != 0 {
its = append(its, iterator.NewIndexedIterator(tables.newIndexIterator(v.s.tops, v.s.icmp, slice, ro), strict))
}
}
return
}
func (v *version) newStaging() *versionStaging {
return &versionStaging{base: v}
}
// Spawn a new version based on this version.
func (v *version) spawn(r *sessionRecord) *version {
staging := v.newStaging()
staging.commit(r)
return staging.finish()
}
func (v *version) fillRecord(r *sessionRecord) {
for level, tables := range v.levels {
for _, t := range tables {
r.addTableFile(level, t)
}
}
}
func (v *version) tLen(level int) int {
if level < len(v.levels) {
return len(v.levels[level])
}
return 0
}
func (v *version) offsetOf(ikey internalKey) (n int64, err error) {
for level, tables := range v.levels {
for _, t := range tables {
if v.s.icmp.Compare(t.imax, ikey) <= 0 {
// Entire file is before "ikey", so just add the file size
n += t.size
} else if v.s.icmp.Compare(t.imin, ikey) > 0 {
// Entire file is after "ikey", so ignore
if level > 0 {
// Files other than level 0 are sorted by meta->min, so
// no further files in this level will contain data for
// "ikey".
break
}
} else {
// "ikey" falls in the range for this table. Add the
// approximate offset of "ikey" within the table.
if m, err := v.s.tops.offsetOf(t, ikey); err == nil {
n += m
} else {
return 0, err
}
}
}
}
return
}
func (v *version) pickMemdbLevel(umin, umax []byte, maxLevel int) (level int) {
if maxLevel > 0 {
if len(v.levels) == 0 {
return maxLevel
}
if !v.levels[0].overlaps(v.s.icmp, umin, umax, true) {
var overlaps tFiles
for ; level < maxLevel; level++ {
if pLevel := level + 1; pLevel >= len(v.levels) {
return maxLevel
} else if v.levels[pLevel].overlaps(v.s.icmp, umin, umax, false) {
break
}
if gpLevel := level + 2; gpLevel < len(v.levels) {
overlaps = v.levels[gpLevel].getOverlaps(overlaps, v.s.icmp, umin, umax, false)
if overlaps.size() > int64(v.s.o.GetCompactionGPOverlaps(level)) {
break
}
}
}
}
}
return
}
func (v *version) computeCompaction() {
// Precomputed best level for next compaction
bestLevel := int(-1)
bestScore := float64(-1)
statFiles := make([]int, len(v.levels))
statSizes := make([]string, len(v.levels))
statScore := make([]string, len(v.levels))
statTotSize := int64(0)
for level, tables := range v.levels {
var score float64
size := tables.size()
if level == 0 {
// We treat level-0 specially by bounding the number of files
// instead of number of bytes for two reasons:
//
// (1) With larger write-buffer sizes, it is nice not to do too
// many level-0 compaction.
//
// (2) The files in level-0 are merged on every read and
// therefore we wish to avoid too many files when the individual
// file size is small (perhaps because of a small write-buffer
// setting, or very high compression ratios, or lots of
// overwrites/deletions).
score = float64(len(tables)) / float64(v.s.o.GetCompactionL0Trigger())
} else {
score = float64(size) / float64(v.s.o.GetCompactionTotalSize(level))
}
if score > bestScore {
bestLevel = level
bestScore = score
}
statFiles[level] = len(tables)
statSizes[level] = shortenb(int(size))
statScore[level] = fmt.Sprintf("%.2f", score)
statTotSize += size
}
v.cLevel = bestLevel
v.cScore = bestScore
v.s.logf("version@stat F·%v S·%s%v Sc·%v", statFiles, shortenb(int(statTotSize)), statSizes, statScore)
}
func (v *version) needCompaction() bool {
return v.cScore >= 1 || atomic.LoadPointer(&v.cSeek) != nil
}
type tablesScratch struct {
added map[int64]atRecord
deleted map[int64]struct{}
}
type versionStaging struct {
base *version
levels []tablesScratch
}
func (p *versionStaging) getScratch(level int) *tablesScratch {
if level >= len(p.levels) {
newLevels := make([]tablesScratch, level+1)
copy(newLevels, p.levels)
p.levels = newLevels
}
return &(p.levels[level])
}
func (p *versionStaging) commit(r *sessionRecord) {
// Deleted tables.
for _, r := range r.deletedTables {
scratch := p.getScratch(r.level)
if r.level < len(p.base.levels) && len(p.base.levels[r.level]) > 0 {
if scratch.deleted == nil {
scratch.deleted = make(map[int64]struct{})
}
scratch.deleted[r.num] = struct{}{}
}
if scratch.added != nil {
delete(scratch.added, r.num)
}
}
// New tables.
for _, r := range r.addedTables {
scratch := p.getScratch(r.level)
if scratch.added == nil {
scratch.added = make(map[int64]atRecord)
}
scratch.added[r.num] = r
if scratch.deleted != nil {
delete(scratch.deleted, r.num)
}
}
}
func (p *versionStaging) finish() *version {
// Build new version.
nv := newVersion(p.base.s)
numLevel := len(p.levels)
if len(p.base.levels) > numLevel {
numLevel = len(p.base.levels)
}
nv.levels = make([]tFiles, numLevel)
for level := 0; level < numLevel; level++ {
var baseTabels tFiles
if level < len(p.base.levels) {
baseTabels = p.base.levels[level]
}
if level < len(p.levels) {
scratch := p.levels[level]
var nt tFiles
// Prealloc list if possible.
if n := len(baseTabels) + len(scratch.added) - len(scratch.deleted); n > 0 {
nt = make(tFiles, 0, n)
}
// Base tables.
for _, t := range baseTabels {
if _, ok := scratch.deleted[t.fd.Num]; ok {
continue
}
if _, ok := scratch.added[t.fd.Num]; ok {
continue
}
nt = append(nt, t)
}
// New tables.
for _, r := range scratch.added {
nt = append(nt, tableFileFromRecord(r))
}
if len(nt) != 0 {
// Sort tables.
if level == 0 {
nt.sortByNum()
} else {
nt.sortByKey(p.base.s.icmp)
}
nv.levels[level] = nt
}
} else {
nv.levels[level] = baseTabels
}
}
// Trim levels.
n := len(nv.levels)
for ; n > 0 && nv.levels[n-1] == nil; n-- {
}
nv.levels = nv.levels[:n]
// Compute compaction score for new version.
nv.computeCompaction()
return nv
}
type versionReleaser struct {
v *version
once bool
}
func (vr *versionReleaser) Release() {
v := vr.v
v.s.vmu.Lock()
if !vr.once {
v.releaseNB()
vr.once = true
}
v.s.vmu.Unlock()
}

33
vendor/modules.txt vendored
View File

@ -74,6 +74,8 @@ github.com/go-sql-driver/mysql
github.com/go-testfixtures/testfixtures/v3
# github.com/golang/protobuf v1.3.2
github.com/golang/protobuf/proto
# github.com/golang/snappy v0.0.1
github.com/golang/snappy
# github.com/gordonklaus/ineffassign v0.0.0-20200309095847-7953dde2c7bf
github.com/gordonklaus/ineffassign
# github.com/hashicorp/hcl v1.0.0
@ -192,6 +194,19 @@ github.com/subosito/gotenv
github.com/swaggo/swag
github.com/swaggo/swag/cmd/swag
github.com/swaggo/swag/gen
# github.com/syndtr/goleveldb v1.0.0
github.com/syndtr/goleveldb/leveldb
github.com/syndtr/goleveldb/leveldb/cache
github.com/syndtr/goleveldb/leveldb/comparer
github.com/syndtr/goleveldb/leveldb/errors
github.com/syndtr/goleveldb/leveldb/filter
github.com/syndtr/goleveldb/leveldb/iterator
github.com/syndtr/goleveldb/leveldb/journal
github.com/syndtr/goleveldb/leveldb/memdb
github.com/syndtr/goleveldb/leveldb/opt
github.com/syndtr/goleveldb/leveldb/storage
github.com/syndtr/goleveldb/leveldb/table
github.com/syndtr/goleveldb/leveldb/util
# github.com/ulule/limiter/v3 v3.3.0
github.com/ulule/limiter/v3
github.com/ulule/limiter/v3/drivers/store/common
@ -279,11 +294,23 @@ honnef.co/go/tools/unused
honnef.co/go/tools/version
# src.techknowlogick.com/xgo v0.0.0-20200408234745-bb0faa361273
src.techknowlogick.com/xgo
# src.techknowlogick.com/xormigrate v1.1.0
# src.techknowlogick.com/xormigrate v1.2.0
src.techknowlogick.com/xormigrate
# xorm.io/builder v0.3.6
# xorm.io/builder v0.3.7
xorm.io/builder
# xorm.io/core v0.7.3
xorm.io/core
# xorm.io/xorm v0.8.1
# xorm.io/xorm v1.0.1
xorm.io/xorm
xorm.io/xorm/caches
xorm.io/xorm/contexts
xorm.io/xorm/convert
xorm.io/xorm/core
xorm.io/xorm/dialects
xorm.io/xorm/internal/json
xorm.io/xorm/internal/statements
xorm.io/xorm/internal/utils
xorm.io/xorm/log
xorm.io/xorm/names
xorm.io/xorm/schemas
xorm.io/xorm/tags

2
vendor/src.techknowlogick.com/xormigrate/.drone.yml generated vendored
View File

@ -7,7 +7,7 @@ workspace:
steps:
- name: fetch-and-test
image: golang:1.13
image: golang:1.14
environment:
GO111MODULE: on
commands:

16
vendor/src.techknowlogick.com/xormigrate/go.mod generated vendored
View File

@ -1,17 +1,19 @@
module src.techknowlogick.com/xormigrate
go 1.12
go 1.14
require (
github.com/denisenkom/go-mssqldb v0.0.0-20200206145737-bbfc9a55622e
github.com/go-sql-driver/mysql v1.5.0
github.com/golang/protobuf v1.3.1 // indirect
github.com/golang/snappy v0.0.1 // indirect
github.com/joho/godotenv v1.3.0
github.com/lib/pq v1.3.0
github.com/mattn/go-sqlite3 v2.0.3+incompatible
github.com/stretchr/testify v1.4.0
google.golang.org/appengine v1.6.1 // indirect
xorm.io/core v0.7.3 // indirect
xorm.io/xorm v0.8.1
github.com/stretchr/testify v1.5.1
golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5 // indirect
golang.org/x/net v0.0.0-20190603091049-60506f45cf65 // indirect
golang.org/x/sys v0.0.0-20190606165138-5da285871e9c // indirect
golang.org/x/text v0.3.2 // indirect
xorm.io/xorm v1.0.1
)
replace github.com/golang/lint => golang.org/x/lint v0.0.0-20190330180304-d0100b6

44
vendor/src.techknowlogick.com/xormigrate/go.sum generated vendored
View File

@ -1,6 +1,8 @@
cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
cloud.google.com/go v0.37.4/go.mod h1:NHPJ89PdicEuT9hdPXMROBD91xc5uRDxsMtSB16k7hw=
gitea.com/xorm/sqlfiddle v0.0.0-20180821085327-62ce714f951a h1:lSA0F4e9A2NcQSqGqTOXqu2aRi/XEQxDCBwM8yJtE6s=
gitea.com/xorm/sqlfiddle v0.0.0-20180821085327-62ce714f951a/go.mod h1:EXuID2Zs0pAQhH8yz+DNjUbjppKQzKFAn28TMYPB6IU=
github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
github.com/Shopify/sarama v1.19.0/go.mod h1:FVkBWblsNy7DGZRfXLU0O9RCGt5g3g3yEuWXgklEdEo=
github.com/Shopify/toxiproxy v2.1.4+incompatible/go.mod h1:OXgGpZ6Cli1/URJOF1DMxUHB2q5Ap20/P/eIdh4G0pI=
@ -13,21 +15,20 @@ github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSs
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/denisenkom/go-mssqldb v0.0.0-20190707035753-2be1aa521ff4/go.mod h1:zAg7JM8CkOJ43xKXIj7eRO9kmWm/TW578qo+oDO6tuM=
github.com/denisenkom/go-mssqldb v0.0.0-20191128021309-1d7a30a10f73 h1:OGNva6WhsKst5OZf7eZOklDztV3hwtTHovdrLHV+MsA=
github.com/denisenkom/go-mssqldb v0.0.0-20191128021309-1d7a30a10f73/go.mod h1:xbL0rPBG9cCiLr28tMa8zpbdarY27NDyej4t/EjAShU=
github.com/denisenkom/go-mssqldb v0.0.0-20200206145737-bbfc9a55622e h1:LzwWXEScfcTu7vUZNlDDWDARoSGEtvlDKK2BYHowNeE=
github.com/denisenkom/go-mssqldb v0.0.0-20200206145737-bbfc9a55622e/go.mod h1:xbL0rPBG9cCiLr28tMa8zpbdarY27NDyej4t/EjAShU=
github.com/eapache/go-resiliency v1.1.0/go.mod h1:kFI+JgMyC7bLPUVY133qvEBtVayf5mFgVsvEsIPBvNs=
github.com/eapache/go-xerial-snappy v0.0.0-20180814174437-776d5712da21/go.mod h1:+020luEh2TKB4/GOp8oxxtq0Daoen/Cii55CzbTV6DU=
github.com/eapache/queue v1.1.0/go.mod h1:6eCeP0CKFpHLu8blIFXhExK/dRa7WDZfr6jVFPTqq+I=
github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
github.com/go-sql-driver/mysql v1.4.1 h1:g24URVg0OFbNUTx9qqY1IRZ9D9z3iPyi5zKhQZpNwpA=
github.com/go-sql-driver/mysql v1.4.1/go.mod h1:zAC/RDZ24gD3HViQzih4MyKcchzm+sOG5ZlKdlhCg5w=
github.com/go-sql-driver/mysql v1.5.0 h1:ozyZYNQW3x3HtqT1jira07DN2PArx2v7/mN66gGcHOs=
github.com/go-sql-driver/mysql v1.5.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LBy8hT2VhHyBg=
github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
github.com/go-xorm/sqlfiddle v0.0.0-20180821085327-62ce714f951a h1:9wScpmSP5A3Bk8V3XHWUcJmYTh+ZnlHVyc+A4oZYS3Y=
github.com/go-xorm/sqlfiddle v0.0.0-20180821085327-62ce714f951a/go.mod h1:56xuuqnHyryaerycW3BfssRdxQstACi0Epw/yC5E2xM=
github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
github.com/gogo/protobuf v1.2.0/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
github.com/golang-sql/civil v0.0.0-20190719163853-cb61b32ac6fe h1:lXe2qZdvpiX5WZkZR4hgp4KJVfY3nMkvmwbVkpv1rVY=
@ -36,8 +37,12 @@ github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfU
github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
github.com/golang/mock v1.2.0/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
github.com/golang/protobuf v1.3.1 h1:YF8+flBXS5eO826T4nzqPrxfhQThhXl0YzfuUPu4SBg=
github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db h1:woRePGFeVFfLKN/pOkfl+p/TAqKOfFu+7KPlMVpok/w=
github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
github.com/golang/snappy v0.0.1 h1:Qgr9rKW7uDUkrbSmQeiDsGa8SjGyCOGtuasMWwvp2P4=
github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
github.com/google/go-cmp v0.2.0 h1:+dTQ8DZQJz0Mb/HjFlkptS1FeQ4cWSnN941F8aEG4SQ=
github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
@ -47,6 +52,7 @@ github.com/googleapis/gax-go/v2 v2.0.4/go.mod h1:0Wqv26UfaUD9n4G6kQubkQ+KchISgw+
github.com/gorilla/context v1.1.1/go.mod h1:kBGZzfjB9CEq2AlWe17Uuf7NDRt0dE0s8S51q0aT7Yg=
github.com/gorilla/mux v1.6.2/go.mod h1:1lud6UwP+6orDFRuTfBEV8e9/aOM/c4fVVCaMa2zaAs=
github.com/hashicorp/golang-lru v0.5.0/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
github.com/hpcloud/tail v1.0.0 h1:nfCOvKYfkgYP8hkirhJocXT2+zOD8yUNjXaWfTlyFKI=
github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
github.com/joho/godotenv v1.3.0 h1:Zjp+RcGpHhGlrMbJzXTrZZPrWj+1vfm90La1wgB6Bhc=
github.com/joho/godotenv v1.3.0/go.mod h1:7hK45KPybAkOC6peb+G5yklZfMxEjkZhHbwpqxOKXbg=
@ -66,13 +72,14 @@ github.com/lib/pq v1.3.0 h1:/qkRGz8zljWiDcFvgpwUpwIAPu3r07TDvs3Rws+o/pU=
github.com/lib/pq v1.3.0/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
github.com/mattn/go-sqlite3 v1.10.0 h1:jbhqpg7tQe4SupckyijYiy0mJJ/pRyHvXf7JdWK860o=
github.com/mattn/go-sqlite3 v1.10.0/go.mod h1:FPy6KqzDD04eiIsT53CuJW3U88zkxoIYsOqkbpncsNc=
github.com/mattn/go-sqlite3 v2.0.2+incompatible h1:qzw9c2GNT8UFrgWNDhCTqRqYUSmu/Dav/9Z58LGpk7U=
github.com/mattn/go-sqlite3 v2.0.2+incompatible/go.mod h1:FPy6KqzDD04eiIsT53CuJW3U88zkxoIYsOqkbpncsNc=
github.com/mattn/go-sqlite3 v2.0.3+incompatible h1:gXHsfypPkaMZrKbD5209QV9jbUTJKjyR5WD3HYQSd+U=
github.com/mattn/go-sqlite3 v2.0.3+incompatible/go.mod h1:FPy6KqzDD04eiIsT53CuJW3U88zkxoIYsOqkbpncsNc=
github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
github.com/onsi/ginkgo v1.7.0 h1:WSHQ+IS43OoUrWtD1/bbclrwK8TTH5hzp+umCiuxHgs=
github.com/onsi/ginkgo v1.7.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
github.com/onsi/gomega v1.4.3 h1:RE1xgDvH7imwFD45h+u2SgIfERHlS2yNG4DObb5BSKU=
github.com/onsi/gomega v1.4.3/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1CpauHY=
github.com/openzipkin/zipkin-go v0.1.6/go.mod h1:QgAqvLzwWbR/WpD4A3cGpPtJrZXNIiJc5AZX7/PBEpw=
github.com/pierrec/lz4 v2.0.5+incompatible/go.mod h1:pdkljMzZIN41W+lC3N2tnIh5sFi+IEE17M5jbnwPHcY=
@ -95,6 +102,10 @@ github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0
github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJyk=
github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
github.com/stretchr/testify v1.5.1 h1:nOGnQDM7FYENwehXlg/kFVnos3rEvtKTjRvOWSzb6H4=
github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
github.com/syndtr/goleveldb v1.0.0 h1:fBdIW9lB4Iz0n9khmH8w27SJ3QEJ7+IgjPEwGSZiFdE=
github.com/syndtr/goleveldb v1.0.0/go.mod h1:ZVVdQEZoIme9iO1Ch2Jdy24qqXrMMOU6lpPAyBWyWuQ=
github.com/ziutek/mymysql v1.5.4 h1:GB0qdRGsTwQSBVYuVShFBKaXSnSnYYC2d9knnE1LHFs=
github.com/ziutek/mymysql v1.5.4/go.mod h1:LMSpPZ6DbqWFxNCHW77HeMg9I646SAhApZ/wKdgO/C0=
go.opencensus.io v0.20.1/go.mod h1:6WKK9ahsWS3RSO+PY9ZHZUfv2irvY6gN279GOPZjmmk=
@ -117,6 +128,7 @@ golang.org/x/net v0.0.0-20190125091013-d26f9f9a57f3/go.mod h1:mL1N/T3taQHkDXs73r
golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190603091049-60506f45cf65 h1:+rhAzEzT3f4JtomfC371qB+0Ola2caSKcY69NUBZrRQ=
golang.org/x/net v0.0.0-20190603091049-60506f45cf65/go.mod h1:HSz+uSET+XFnRR8LxR5pz3Of3rY3CfYBVs4xY44aLks=
golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
@ -124,7 +136,6 @@ golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJ
golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@ -132,9 +143,11 @@ golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5h
golang.org/x/sys v0.0.0-20181122145206-62eef0e2fa9b/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20190606165138-5da285871e9c h1:+EXw7AwNOKzPFXMZ1yNjO40aWCh3PIquJB2fYlv9wcs=
golang.org/x/sys v0.0.0-20190606165138-5da285871e9c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.2 h1:tW2bmiBqwgJj/UpqtC8EpXEZVYOwU0yG4iWbprSVAcs=
golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
golang.org/x/tools v0.0.0-20180828015842-6cd1fcedba52/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
@ -142,13 +155,10 @@ golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGm
golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
golang.org/x/tools v0.0.0-20190312170243-e65039ee4138/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
golang.org/x/tools v0.0.0-20190606124116-d0a3d012864b/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
google.golang.org/api v0.3.1/go.mod h1:6wY9I6uQWHQ8EM57III9mq/AjF+i8G65rmVagqKMtkk=
google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
google.golang.org/appengine v1.6.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
google.golang.org/appengine v1.6.1 h1:QzqyMA1tlu6CgqCDUtU9V+ZKhLFT2dkJuANu5QaxI3I=
google.golang.org/appengine v1.6.1/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0=
google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
google.golang.org/genproto v0.0.0-20190404172233-64821d5d2107/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
@ -158,7 +168,9 @@ gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLks
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/fsnotify.v1 v1.4.7 h1:xOHLXZwVvI9hhs+cLKq5+I5onOuwQLhQwiu63xxlHs4=
gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
@ -166,11 +178,7 @@ gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
honnef.co/go/tools v0.0.0-20180728063816-88497007e858/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
xorm.io/builder v0.3.6 h1:ha28mQ2M+TFx96Hxo+iq6tQgnkC9IZkM6D8w9sKHHF8=
xorm.io/builder v0.3.6/go.mod h1:LEFAPISnRzG+zxaxj2vPicRwz67BdhFreKg8yv8/TgU=
xorm.io/core v0.7.2 h1:mEO22A2Z7a3fPaZMk6gKL/jMD80iiyNwRrX5HOv3XLw=
xorm.io/core v0.7.2/go.mod h1:jJfd0UAEzZ4t87nbQYtVjmqpIODugN6PD2D9E+dJvdM=
xorm.io/core v0.7.3 h1:W8ws1PlrnkS1CZU1YWaYLMQcQilwAmQXU0BJDJon+H0=
xorm.io/core v0.7.3/go.mod h1:jJfd0UAEzZ4t87nbQYtVjmqpIODugN6PD2D9E+dJvdM=
xorm.io/xorm v0.8.1 h1:4f2KXuQxVdaX3RdI3Fw81NzMiSpZeyCZt8m3sEVeIkQ=
xorm.io/xorm v0.8.1/go.mod h1:ZkJLEYLoVyg7amJK/5r779bHyzs2AU8f8VMiP6BM7uY=
xorm.io/builder v0.3.7 h1:2pETdKRK+2QG4mLX4oODHEhn5Z8j1m8sXa7jfu+/SZI=
xorm.io/builder v0.3.7/go.mod h1:aUW0S9eb9VCaPohFCH3j7czOx1PMW3i1HrSzbLYGBSE=
xorm.io/xorm v1.0.1 h1:/lITxpJtkZauNpdzj+L9CN/3OQxZaABrbergMcJu+Cw=
xorm.io/xorm v1.0.1/go.mod h1:o4vnEsQ5V2F1/WK6w4XTwmiWJeGj82tqjAnHe44wVHY=

71
vendor/xorm.io/builder/.drone.yml generated vendored
View File

@ -1,31 +1,6 @@
---
kind: pipeline
name: go1.10
workspace:
base: /go
path: src/xorm.io/builder
steps:
- name: test
pull: default
image: golang:1.10
commands:
- go get -u golang.org/x/lint/golint
- go get -u github.com/stretchr/testify/assert
- go get -u github.com/go-xorm/sqlfiddle
- golint ./...
- go vet
- go test -v -race -coverprofile=coverage.txt -covermode=atomic
when:
event:
- push
- tag
- pull_request
---
kind: pipeline
name: go1.11
name: testing
steps:
- name: test
@ -36,50 +11,6 @@ steps:
- golint ./...
- go vet
- go test -v -race -coverprofile=coverage.txt -covermode=atomic
environment:
GOPROXY: https://goproxy.cn
GO111MODULE: "on"
when:
event:
- push
- tag
- pull_request
---
kind: pipeline
name: go1.12
steps:
- name: test
pull: default
image: golang:1.12
commands:
- go get -u golang.org/x/lint/golint
- golint ./...
- go vet
- go test -v -race -coverprofile=coverage.txt -covermode=atomic
environment:
GOPROXY: https://goproxy.cn
GO111MODULE: "on"
when:
event:
- push
- tag
- pull_request
---
kind: pipeline
name: go1.13
steps:
- name: test
pull: default
image: golang:1.13
commands:
- go get -u golang.org/x/lint/golint
- golint ./...
- go vet
- go test -v -race -coverprofile=coverage.txt -covermode=atomic
environment:
GOPROXY: https://goproxy.cn
GO111MODULE: "on"

1
vendor/xorm.io/builder/.gitignore generated vendored Normal file
View File

@ -0,0 +1 @@
.idea

60
vendor/xorm.io/builder/builder.go generated vendored
View File

@ -17,7 +17,7 @@ const (
insertType // insert
updateType // update
deleteType // delete
unionType // union
setOpType // set operation
)
// all databasees
@ -27,6 +27,10 @@ const (
MYSQL = "mysql"
MSSQL = "mssql"
ORACLE = "oracle"
UNION = "union"
INTERSECT = "intersect"
EXCEPT = "except"
)
type join struct {
@ -35,9 +39,10 @@ type join struct {
joinCond Cond
}
type union struct {
unionType string
builder *Builder
type setOp struct {
opType string
distinctType string
builder *Builder
}
type limit struct {
@ -56,7 +61,7 @@ type Builder struct {
cond Cond
selects []string
joins []join
unions []union
setOps []setOp
limitation *limit
insertCols []string
insertVals []interface{}
@ -144,33 +149,48 @@ func (b *Builder) Into(tableName string) *Builder {
}
// Union sets union conditions
func (b *Builder) Union(unionTp string, unionCond *Builder) *Builder {
func (b *Builder) Union(distinctType string, cond *Builder) *Builder {
return b.setOperation(UNION, distinctType, cond)
}
// Intersect sets intersect conditions
func (b *Builder) Intersect(distinctType string, cond *Builder) *Builder {
return b.setOperation(INTERSECT, distinctType, cond)
}
// Except sets except conditions
func (b *Builder) Except(distinctType string, cond *Builder) *Builder {
return b.setOperation(EXCEPT, distinctType, cond)
}
func (b *Builder) setOperation(opType, distinctType string, cond *Builder) *Builder {
var builder *Builder
if b.optype != unionType {
if b.optype != setOpType {
builder = &Builder{cond: NewCond()}
builder.optype = unionType
builder.optype = setOpType
builder.dialect = b.dialect
builder.selects = b.selects
currentUnions := b.unions
// erase sub unions (actually append to new Builder.unions)
b.unions = nil
currentSetOps := b.setOps
// erase sub setOps (actually append to new Builder.unions)
b.setOps = nil
for e := range currentUnions {
currentUnions[e].builder.dialect = b.dialect
for e := range currentSetOps {
currentSetOps[e].builder.dialect = b.dialect
}
builder.unions = append(append(builder.unions, union{"", b}), currentUnions...)
builder.setOps = append(append(builder.setOps, setOp{opType, "", b}), currentSetOps...)
} else {
builder = b
}
if unionCond != nil {
if unionCond.dialect == "" && builder.dialect != "" {
unionCond.dialect = builder.dialect
if cond != nil {
if cond.dialect == "" && builder.dialect != "" {
cond.dialect = builder.dialect
}
builder.unions = append(builder.unions, union{unionTp, unionCond})
builder.setOps = append(builder.setOps, setOp{opType, distinctType, cond})
}
return builder
@ -240,8 +260,8 @@ func (b *Builder) WriteTo(w Writer) error {
return b.updateWriteTo(w)
case deleteType:
return b.deleteWriteTo(w)
case unionType:
return b.unionWriteTo(w)
case setOpType:
return b.setOpWriteTo(w)
}
return ErrNotSupportType

2
vendor/xorm.io/builder/builder_insert.go generated vendored
View File

@ -58,6 +58,8 @@ func (b *Builder) insertWriteTo(w Writer) error {
if e, ok := value.(expr); ok {
fmt.Fprintf(valBuffer, "(%s)", e.sql)
args = append(args, e.args...)
} else if value == nil {
fmt.Fprintf(valBuffer, `null`)
} else {
fmt.Fprint(valBuffer, "?")
args = append(args, value)

9
vendor/xorm.io/builder/builder_limit.go generated vendored
View File

@ -21,6 +21,9 @@ func (b *Builder) limitWriteTo(w Writer) error {
}
// erase limit condition
b.limitation = nil
defer func() {
b.limitation = limit
}()
ow := w.(*BytesWriter)
switch strings.ToLower(strings.TrimSpace(b.dialect)) {
@ -34,7 +37,7 @@ func (b *Builder) limitWriteTo(w Writer) error {
b.selects = append(selects, "ROWNUM RN")
var wb *Builder
if b.optype == unionType {
if b.optype == setOpType {
wb = Dialect(b.dialect).Select("at.*", "ROWNUM RN").
From(b, "at")
} else {
@ -55,7 +58,7 @@ func (b *Builder) limitWriteTo(w Writer) error {
return final.WriteTo(ow)
case SQLITE, MYSQL, POSTGRES:
// if type UNION, we need to write previous content back to current writer
if b.optype == unionType {
if b.optype == setOpType {
if err := b.WriteTo(ow); err != nil {
return err
}
@ -77,7 +80,7 @@ func (b *Builder) limitWriteTo(w Writer) error {
b.selects[1:]...), "ROW_NUMBER() OVER (ORDER BY (SELECT 1)) AS RN")
var wb *Builder
if b.optype == unionType {
if b.optype == setOpType {
wb = Dialect(b.dialect).Select("*", "ROW_NUMBER() OVER (ORDER BY (SELECT 1)) AS RN").
From(b, "at")
} else {

2
vendor/xorm.io/builder/builder_select.go generated vendored
View File

@ -63,7 +63,7 @@ func (b *Builder) selectWriteTo(w Writer) error {
}
switch b.subQuery.optype {
case selectType, unionType:
case selectType, setOpType:
fmt.Fprint(w, " FROM (")
if err := b.subQuery.WriteTo(w); err != nil {
return err

14
vendor/xorm.io/builder/builder_union.go → vendor/xorm.io/builder/builder_set_operations.go generated vendored
View File

@ -9,19 +9,19 @@ import (
"strings"
)
func (b *Builder) unionWriteTo(w Writer) error {
func (b *Builder) setOpWriteTo(w Writer) error {
if b.limitation != nil || b.cond.IsValid() ||
b.orderBy != "" || b.having != "" || b.groupBy != "" {
return ErrNotUnexpectedUnionConditions
}
for idx, u := range b.unions {
current := u.builder
for idx, o := range b.setOps {
current := o.builder
if current.optype != selectType {
return ErrUnsupportedUnionMembers
}
if len(b.unions) == 1 {
if len(b.setOps) == 1 {
if err := current.selectWriteTo(w); err != nil {
return err
}
@ -31,7 +31,11 @@ func (b *Builder) unionWriteTo(w Writer) error {
}
if idx != 0 {
fmt.Fprint(w, fmt.Sprintf(" UNION %v ", strings.ToUpper(u.unionType)))
if o.distinctType == "" {
fmt.Fprint(w, fmt.Sprintf(" %s ", strings.ToUpper(o.opType)))
} else {
fmt.Fprint(w, fmt.Sprintf(" %s %s ", strings.ToUpper(o.opType), strings.ToUpper(o.distinctType)))
}
}
fmt.Fprint(w, "(")

4
vendor/xorm.io/builder/builder_update.go generated vendored
View File

@ -45,6 +45,10 @@ func (b *Builder) updateWriteTo(w Writer) error {
}
}
if !b.cond.IsValid() {
return nil
}
if _, err := fmt.Fprint(w, " WHERE "); err != nil {
return err
}

4
vendor/xorm.io/builder/cond_eq.go generated vendored
View File

@ -64,6 +64,10 @@ func (eq Eq) OpWriteTo(op string, w Writer) error {
return err
}
w.Append(int(v.(Decr)))
case nil:
if _, err := fmt.Fprintf(w, "%s=null", k); err != nil {
return err
}
default:
if _, err := fmt.Fprintf(w, "%s=?", k); err != nil {
return err

2
vendor/xorm.io/builder/go.mod generated vendored
View File

@ -3,6 +3,6 @@ module xorm.io/builder
go 1.11
require (
github.com/go-xorm/sqlfiddle v0.0.0-20180821085327-62ce714f951a
gitea.com/xorm/sqlfiddle v0.0.0-20180821085327-62ce714f951a
github.com/stretchr/testify v1.3.0
)

4
vendor/xorm.io/builder/go.sum generated vendored
View File

@ -1,7 +1,7 @@
gitea.com/xorm/sqlfiddle v0.0.0-20180821085327-62ce714f951a h1:lSA0F4e9A2NcQSqGqTOXqu2aRi/XEQxDCBwM8yJtE6s=
gitea.com/xorm/sqlfiddle v0.0.0-20180821085327-62ce714f951a/go.mod h1:EXuID2Zs0pAQhH8yz+DNjUbjppKQzKFAn28TMYPB6IU=
github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/go-xorm/sqlfiddle v0.0.0-20180821085327-62ce714f951a h1:9wScpmSP5A3Bk8V3XHWUcJmYTh+ZnlHVyc+A4oZYS3Y=
github.com/go-xorm/sqlfiddle v0.0.0-20180821085327-62ce714f951a/go.mod h1:56xuuqnHyryaerycW3BfssRdxQstACi0Epw/yC5E2xM=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=

9
vendor/xorm.io/builder/sql.go generated vendored
View File

@ -75,6 +75,7 @@ func noSQLQuoteNeeded(a interface{}) bool {
}
t := reflect.TypeOf(a)
switch t.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return true
@ -133,12 +134,16 @@ func ConvertToBoundSQL(sql string, args []interface{}) (string, error) {
return buf.String(), nil
}
// ConvertPlaceholder replaces ? to $1, $2 ... or :1, :2 ... according prefix
// ConvertPlaceholder replaces the place holder ? to $1, $2 ... or :1, :2 ... according prefix
func ConvertPlaceholder(sql, prefix string) (string, error) {
buf := strings.Builder{}
var i, j, start int
var ready = true
for ; i < len(sql); i++ {
if sql[i] == '?' {
if sql[i] == '\'' && i > 0 && sql[i-1] != '\\' {
ready = !ready
}
if ready && sql[i] == '?' {
if _, err := buf.WriteString(sql[start:i]); err != nil {
return "", err
}

53
vendor/xorm.io/xorm/.changelog.yml generated vendored Normal file
View File

@ -0,0 +1,53 @@
# The full repository name
repo: xorm/xorm
# Service type (gitea or github)
service: gitea
# Base URL for Gitea instance if using gitea service type (optional)
# Default: https://gitea.com
base-url:
# Changelog groups and which labeled PRs to add to each group
groups:
-
name: BREAKING
labels:
- kind/breaking
-
name: FEATURES
labels:
- kind/feature
-
name: SECURITY
labels:
- kind/security
-
name: BUGFIXES
labels:
- kind/bug
-
name: ENHANCEMENTS
labels:
- kind/enhancement
- kind/refactor
- kind/ui
-
name: TESTING
labels:
- kind/testing
-
name: BUILD
labels:
- kind/build
- kind/lint
-
name: DOCS
labels:
- kind/docs
-
name: MISC
default: true
# regex indicating which labels to skip for the changelog
skip-labels: skip-changelog|backport\/.+

367
vendor/xorm.io/xorm/.drone.yml generated vendored
View File

@ -1,204 +1,13 @@
---
kind: pipeline
name: go1.10-test
workspace:
base: /go
path: src/gitea.com/xorm/xorm
name: testing
steps:
- name: build
pull: default
image: golang:1.10
commands:
- go get -t -d -v
- go build -v
when:
event:
- push
- pull_request
- name: test-sqlite
pull: default
image: golang:1.10
depends_on:
- build
commands:
- "go test -v -race -db=\"sqlite3\" -conn_str=\"./test.db\" -coverprofile=coverage1-1.txt -covermode=atomic"
- "go test -v -race -db=\"sqlite3\" -conn_str=\"./test.db\" -cache=true -coverprofile=coverage1-2.txt -covermode=atomic"
when:
event:
- push
- pull_request
- name: test-mysql
pull: default
image: golang:1.10
depends_on:
- build
commands:
- "go test -v -race -db=\"mysql\" -conn_str=\"root:@tcp(mysql)/xorm_test\" -coverprofile=coverage2-1.txt -covermode=atomic"
- "go test -v -race -db=\"mysql\" -conn_str=\"root:@tcp(mysql)/xorm_test\" -cache=true -coverprofile=coverage2-2.txt -covermode=atomic"
when:
event:
- push
- pull_request
- name: test-mysql-utf8mb4
pull: default
image: golang:1.10
depends_on:
- test-mysql
commands:
- "go test -v -race -db=\"mysql\" -conn_str=\"root:@tcp(mysql)/xorm_test?charset=utf8mb4\" -coverprofile=coverage2.1-1.txt -covermode=atomic"
- "go test -v -race -db=\"mysql\" -conn_str=\"root:@tcp(mysql)/xorm_test?charset=utf8mb4\" -cache=true -coverprofile=coverage2.1-2.txt -covermode=atomic"
when:
event:
- push
- pull_request
- name: test-mymysql
pull: default
image: golang:1.10
depends_on:
- test-mysql-utf8mb4
commands:
- "go test -v -race -db=\"mymysql\" -conn_str=\"tcp:mysql:3306*xorm_test/root/\" -coverprofile=coverage3-1.txt -covermode=atomic"
- "go test -v -race -db=\"mymysql\" -conn_str=\"tcp:mysql:3306*xorm_test/root/\" -cache=true -coverprofile=coverage3-2.txt -covermode=atomic"
when:
event:
- push
- pull_request
- name: test-postgres
pull: default
image: golang:1.10
depends_on:
- build
commands:
- "go test -v -race -db=\"postgres\" -conn_str=\"postgres://postgres:@pgsql/xorm_test?sslmode=disable\" -coverprofile=coverage4-1.txt -covermode=atomic"
- "go test -v -race -db=\"postgres\" -conn_str=\"postgres://postgres:@pgsql/xorm_test?sslmode=disable\" -cache=true -coverprofile=coverage4-2.txt -covermode=atomic"
when:
event:
- push
- pull_request
- name: test-postgres-schema
pull: default
image: golang:1.10
depends_on:
- build
commands:
- "go test -v -race -db=\"postgres\" -conn_str=\"postgres://postgres:@pgsql/xorm_test?sslmode=disable\" -schema=xorm -coverprofile=coverage5-1.txt -covermode=atomic"
- "go test -v -race -db=\"postgres\" -conn_str=\"postgres://postgres:@pgsql/xorm_test?sslmode=disable\" -schema=xorm -cache=true -coverprofile=coverage5-2.txt -covermode=atomic"
when:
event:
- push
- pull_request
- name: test-mssql
pull: default
image: golang:1.10
depends_on:
- build
commands:
- "go test -v -race -db=\"mssql\" -conn_str=\"server=mssql;user id=sa;password=yourStrong(!)Password;database=xorm_test\" -coverprofile=coverage6-1.txt -covermode=atomic"
- "go test -v -race -db=\"mssql\" -conn_str=\"server=mssql;user id=sa;password=yourStrong(!)Password;database=xorm_test\" -cache=true -coverprofile=coverage6-2.txt -covermode=atomic"
when:
event:
- push
- pull_request
- name: test-tidb
pull: default
image: golang:1.10
depends_on:
- build
commands:
- "go test -v -race -db=\"mysql\" -conn_str=\"root:@tcp(tidb:4000)/xorm_test\" -ignore_select_update=true -coverprofile=coverage7-1.txt -covermode=atomic"
- "go test -v -race -db=\"mysql\" -conn_str=\"root:@tcp(tidb:4000)/xorm_test\" -ignore_select_update=true -cache=true -coverprofile=coverage7-2.txt -covermode=atomic"
when:
event:
- push
- pull_request
- name: test-end
pull: default
image: golang:1.10
depends_on:
- test-sqlite
- test-mysql
- test-mysql-utf8mb4
- test-mymysql
- test-postgres
- test-postgres-schema
- test-mssql
- test-tidb
commands:
- echo "go1.10 build end"
when:
event:
- push
- pull_request
services:
- name: mysql
pull: default
image: mysql:5.7
environment:
MYSQL_ALLOW_EMPTY_PASSWORD: yes
MYSQL_DATABASE: xorm_test
when:
event:
- push
- tag
- pull_request
- name: pgsql
pull: default
image: postgres:9.5
environment:
POSTGRES_DB: xorm_test
POSTGRES_USER: postgres
when:
event:
- push
- tag
- pull_request
- name: mssql
pull: default
image: microsoft/mssql-server-linux:latest
environment:
ACCEPT_EULA: Y
SA_PASSWORD: yourStrong(!)Password
MSSQL_PID: Developer
when:
event:
- push
- tag
- pull_request
- name: tidb
pull: default
image: pingcap/tidb:v3.0.3
when:
event:
- push
- tag
- pull_request
---
kind: pipeline
name: go1.13-test
steps:
- name: build
pull: default
image: golang:1.13
- name: test-vet
image: golang:1.11
environment:
GO111MODULE: "on"
GOPROXY: "https://goproxy.cn"
commands:
- go build -v
- go vet
when:
event:
@ -206,44 +15,77 @@ steps:
- pull_request
- name: test-sqlite
pull: default
image: golang:1.13
image: golang:1.12
environment:
GO111MODULE: "on"
GOPROXY: "https://goproxy.cn"
commands:
- "go test -v -race -db=\"sqlite3\" -conn_str=\"./test.db\" -coverprofile=coverage1-1.txt -covermode=atomic"
- "go test -v -race -db=\"sqlite3\" -conn_str=\"./test.db\" -cache=true -coverprofile=coverage1-2.txt -covermode=atomic"
- make test-sqlite
- TEST_CACHE_ENABLE=true make test-sqlite
- TEST_QUOTE_POLICY=reserved make test-sqlite
- go test ./caches/... ./contexts/... ./convert/... ./core/... ./dialects/... \
./log/... ./migrate/... ./names/... ./schemas/... ./tags/... \
./internal/json/... ./internal/statements/... ./internal/utils/... \
when:
event:
- push
- pull_request
- name: test-mysql
pull: default
image: golang:1.13
image: golang:1.12
environment:
GO111MODULE: "on"
GOPROXY: "https://goproxy.cn"
TEST_MYSQL_HOST: mysql
TEST_MYSQL_CHARSET: utf8
TEST_MYSQL_DBNAME: xorm_test
TEST_MYSQL_USERNAME: root
TEST_MYSQL_PASSWORD:
commands:
- "go test -v -race -db=\"mysql\" -conn_str=\"root:@tcp(mysql)/xorm_test\" -coverprofile=coverage2-1.txt -covermode=atomic"
- "go test -v -race -db=\"mysql\" -conn_str=\"root:@tcp(mysql)/xorm_test\" -cache=true -coverprofile=coverage2-2.txt -covermode=atomic"
- make test-mysql
- TEST_CACHE_ENABLE=true make test-mysql
- TEST_QUOTE_POLICY=reserved make test-mysql
when:
event:
- push
- pull_request
- name: test-mysql8
image: golang:1.12
environment:
GO111MODULE: "on"
GOPROXY: "https://goproxy.cn"
TEST_MYSQL_HOST: mysql8
TEST_MYSQL_CHARSET: utf8mb4
TEST_MYSQL_DBNAME: xorm_test
TEST_MYSQL_USERNAME: root
TEST_MYSQL_PASSWORD:
commands:
- make test-mysql
- TEST_CACHE_ENABLE=true make test-mysql
- TEST_QUOTE_POLICY=reserved make test-mysql
when:
event:
- push
- pull_request
- name: test-mysql-utf8mb4
pull: default
image: golang:1.13
image: golang:1.12
depends_on:
- test-mysql
- test-mysql
environment:
GO111MODULE: "on"
GOPROXY: "https://goproxy.cn"
TEST_MYSQL_HOST: mysql
TEST_MYSQL_CHARSET: utf8mb4
TEST_MYSQL_DBNAME: xorm_test
TEST_MYSQL_USERNAME: root
TEST_MYSQL_PASSWORD:
commands:
- "go test -v -race -db=\"mysql\" -conn_str=\"root:@tcp(mysql)/xorm_test?charset=utf8mb4\" -coverprofile=coverage2.1-1.txt -covermode=atomic"
- "go test -v -race -db=\"mysql\" -conn_str=\"root:@tcp(mysql)/xorm_test?charset=utf8mb4\" -cache=true -coverprofile=coverage2.1-2.txt -covermode=atomic"
- make test-mysql
- TEST_CACHE_ENABLE=true make test-mysql
- TEST_QUOTE_POLICY=reserved make test-mysql
when:
event:
- push
@ -251,15 +93,20 @@ steps:
- name: test-mymysql
pull: default
image: golang:1.13
image: golang:1.12
depends_on:
- test-mysql-utf8mb4
environment:
GO111MODULE: "on"
GOPROXY: "https://goproxy.cn"
TEST_MYSQL_HOST: mysql:3306
TEST_MYSQL_DBNAME: xorm_test
TEST_MYSQL_USERNAME: root
TEST_MYSQL_PASSWORD:
commands:
- "go test -v -race -db=\"mymysql\" -conn_str=\"tcp:mysql:3306*xorm_test/root/\" -coverprofile=coverage3-1.txt -covermode=atomic"
- "go test -v -race -db=\"mymysql\" -conn_str=\"tcp:mysql:3306*xorm_test/root/\" -cache=true -coverprofile=coverage3-2.txt -covermode=atomic"
- make test-mymysql
- TEST_CACHE_ENABLE=true make test-mymysql
- TEST_QUOTE_POLICY=reserved make test-mymysql
when:
event:
- push
@ -267,13 +114,18 @@ steps:
- name: test-postgres
pull: default
image: golang:1.13
image: golang:1.12
environment:
GO111MODULE: "on"
GOPROXY: "https://goproxy.cn"
TEST_PGSQL_HOST: pgsql
TEST_PGSQL_DBNAME: xorm_test
TEST_PGSQL_USERNAME: postgres
TEST_PGSQL_PASSWORD: postgres
commands:
- "go test -v -race -db=\"postgres\" -conn_str=\"postgres://postgres:@pgsql/xorm_test?sslmode=disable\" -coverprofile=coverage4-1.txt -covermode=atomic"
- "go test -v -race -db=\"postgres\" -conn_str=\"postgres://postgres:@pgsql/xorm_test?sslmode=disable\" -cache=true -coverprofile=coverage4-2.txt -covermode=atomic"
- make test-postgres
- TEST_CACHE_ENABLE=true make test-postgres
- TEST_QUOTE_POLICY=reserved make test-postgres
when:
event:
- push
@ -281,13 +133,21 @@ steps:
- name: test-postgres-schema
pull: default
image: golang:1.13
image: golang:1.12
depends_on:
- test-postgres
environment:
GO111MODULE: "on"
GOPROXY: "https://goproxy.cn"
TEST_PGSQL_HOST: pgsql
TEST_PGSQL_SCHEMA: xorm
TEST_PGSQL_DBNAME: xorm_test
TEST_PGSQL_USERNAME: postgres
TEST_PGSQL_PASSWORD: postgres
commands:
- "go test -v -race -db=\"postgres\" -conn_str=\"postgres://postgres:@pgsql/xorm_test?sslmode=disable\" -schema=xorm -coverprofile=coverage5-1.txt -covermode=atomic"
- "go test -v -race -db=\"postgres\" -conn_str=\"postgres://postgres:@pgsql/xorm_test?sslmode=disable\" -schema=xorm -cache=true -coverprofile=coverage5-2.txt -covermode=atomic"
- make test-postgres
- TEST_CACHE_ENABLE=true make test-postgres
- TEST_QUOTE_POLICY=reserved make test-postgres
when:
event:
- push
@ -295,27 +155,56 @@ steps:
- name: test-mssql
pull: default
image: golang:1.13
image: golang:1.12
environment:
GO111MODULE: "on"
GOPROXY: "https://goproxy.cn"
TEST_MSSQL_HOST: mssql
TEST_MSSQL_DBNAME: xorm_test
TEST_MSSQL_USERNAME: sa
TEST_MSSQL_PASSWORD: "yourStrong(!)Password"
commands:
- "go test -v -race -db=\"mssql\" -conn_str=\"server=mssql;user id=sa;password=yourStrong(!)Password;database=xorm_test\" -coverprofile=coverage6-1.txt -covermode=atomic"
- "go test -v -race -db=\"mssql\" -conn_str=\"server=mssql;user id=sa;password=yourStrong(!)Password;database=xorm_test\" -cache=true -coverprofile=coverage6-2.txt -covermode=atomic"
- make test-mssql
- TEST_CACHE_ENABLE=true make test-mssql
- TEST_QUOTE_POLICY=reserved make test-mssql
when:
event:
- push
- pull_request
- name: test-tidb
pull: default
image: golang:1.12
environment:
GO111MODULE: "on"
GOPROXY: "https://goproxy.cn"
TEST_TIDB_HOST: "tidb:4000"
TEST_TIDB_DBNAME: xorm_test
TEST_TIDB_USERNAME: root
TEST_TIDB_PASSWORD:
commands:
- make test-tidb
- TEST_CACHE_ENABLE=true make test-tidb
- TEST_QUOTE_POLICY=reserved make test-tidb
when:
event:
- push
- pull_request
- name: test-cockroach
pull: default
image: golang:1.13
environment:
GO111MODULE: "on"
GOPROXY: "https://goproxy.cn"
TEST_COCKROACH_HOST: "cockroach:26257"
TEST_COCKROACH_DBNAME: xorm_test
TEST_COCKROACH_USERNAME: root
TEST_COCKROACH_PASSWORD:
commands:
- "go test -v -race -db=\"mysql\" -conn_str=\"root:@tcp(tidb:4000)/xorm_test\" -ignore_select_update=true -coverprofile=coverage7-1.txt -covermode=atomic"
- "go test -v -race -db=\"mysql\" -conn_str=\"root:@tcp(tidb:4000)/xorm_test\" -ignore_select_update=true -cache=true -coverprofile=coverage7-2.txt -covermode=atomic"
- sleep 10
- make test-cockroach
- TEST_CACHE_ENABLE=true make test-cockroach
when:
event:
- push
@ -323,23 +212,23 @@ steps:
- name: merge_coverage
pull: default
image: golang:1.13
image: golang:1.12
environment:
GO111MODULE: "on"
GOPROXY: "https://goproxy.cn"
depends_on:
- build
- test-vet
- test-sqlite
- test-mysql
- test-mysql-utf8mb4
- test-mysql8
- test-mymysql
- test-postgres
- test-postgres-schema
- test-mssql
- test-tidb
- test-cockroach
commands:
- go get github.com/wadey/gocovmerge
- gocovmerge coverage1-1.txt coverage1-2.txt coverage2-1.txt coverage2-2.txt coverage2.1-1.txt coverage2.1-2.txt coverage3-1.txt coverage3-2.txt coverage4-1.txt coverage4-2.txt coverage5-1.txt coverage5-2.txt coverage6-1.txt coverage6-2.txt coverage7-1.txt coverage7-2.txt > coverage.txt
- make coverage
when:
event:
- push
@ -359,12 +248,25 @@ services:
- tag
- pull_request
- name: mysql8
pull: default
image: mysql:8.0
environment:
MYSQL_ALLOW_EMPTY_PASSWORD: yes
MYSQL_DATABASE: xorm_test
when:
event:
- push
- tag
- pull_request
- name: pgsql
pull: default
image: postgres:9.5
environment:
POSTGRES_DB: xorm_test
POSTGRES_USER: postgres
POSTGRES_PASSWORD: postgres
when:
event:
- push
@ -391,4 +293,15 @@ services:
event:
- push
- tag
- pull_request
- pull_request
- name: cockroach
pull: default
image: cockroachdb/cockroach:v19.2.4
commands:
- /cockroach/cockroach start --insecure
when:
event:
- push
- tag
- pull_request

3
vendor/xorm.io/xorm/.gitignore generated vendored
View File

@ -7,6 +7,7 @@
# Folders
_obj
_test
vendor/
# Architecture specific extensions/prefixes
*.[568vq]
@ -31,3 +32,5 @@ xorm.test
test.db.sql
.idea/
*coverage.out

25
vendor/xorm.io/xorm/.revive.toml generated vendored Normal file
View File

@ -0,0 +1,25 @@
ignoreGeneratedHeader = false
severity = "warning"
confidence = 0.8
errorCode = 1
warningCode = 1
[rule.blank-imports]
[rule.context-as-argument]
[rule.context-keys-type]
[rule.dot-imports]
[rule.error-return]
[rule.error-strings]
[rule.error-naming]
[rule.exported]
[rule.if-return]
[rule.increment-decrement]
[rule.var-naming]
[rule.var-declaration]
[rule.package-comments]
[rule.range]
[rule.receiver-naming]
[rule.time-naming]
[rule.unexported-return]
[rule.indent-error-flow]
[rule.errorf]

183
vendor/xorm.io/xorm/CHANGELOG.md generated vendored Normal file
View File

@ -0,0 +1,183 @@
# Changelog
This changelog goes through all the changes that have been made in each release
without substantial changes to our git log.
## [1.0.1](https://gitea.com/xorm/xorm/pulls?q=&type=all&state=closed&milestone=1253) - 2020-03-25
* BUGFIXES
* Oracle : Local Naming Method (#1515)
* Fix find and count bug (#1618)
* Fix duplicated deleted condition on FindAndCount (#1619)
* Fix find and count bug with cache (#1622)
* Fix postgres schema problem (#1624)
* Fix quote with blank (#1626)
## [1.0.0](https://gitea.com/xorm/xorm/pulls?q=&type=all&state=closed&milestone=1242) - 2020-03-22
* BREAKING
* Add context for dialects (#1558)
* Move zero functions to a standalone package (#1548)
* Merge core package back into the main repository and split into serval sub packages. (#1543)
* FEATURES
* Use a new ContextLogger interface to implement logger (#1557)
* BUGFIXES
* Fix setschema (#1606)
* Fix dump/import bug (#1603)
* Fix pk bug (#1602)
* Fix master/slave bug (#1601)
* Fix bug when dump (#1597)
* Ignore schema when dbtype is not postgres (#1593)
* Fix table name (#1590)
* Fix find alias bug (#1581)
* Fix rows bug (#1576)
* Fix map with cols (#1575)
* Fix bug on deleted with join (#1570)
* Improve quote policy (#1567)
* Fix break session sql enable feature (#1566)
* Fix mssql quote (#1535)
* Fix join table name quote bug (#1534)
* Fix mssql issue with duplicate columns. (#1225)
* Fix mysql8.0 sync failed (#808)
* ENHANCEMENTS
* Fix batch insert interface slice be panic (#1598)
* Move some codes to statement sub package (#1574)
* Remove circle file (#1569)
* Move statement as a sub package (#1564)
* Move maptype to tag parser (#1561)
* Move caches to manager (#1553)
* Improve code (#1552)
* Improve some codes (#1551)
* Improve statement (#1549)
* Move tag parser related codes as a standalone sub package (#1547)
* Move reserve words related files into dialects sub package (#1544)
* Fix `Conversion` method `ToDB() ([]byte, error)` return type is nil (#1296)
* Check driver.Valuer response, and skip the column if nil (#1167)
* Add cockroach support and tests (#896)
* TESTING
* Improve tests (#1572)
* BUILD
* Add changelog file and tool configuration (#1546)
* DOCS
* Fix outdate changelog (#1565)
## old changelog
* **v0.6.5**
* Postgres schema support
* vgo support
* Add FindAndCount
* Database special params support via NewEngineWithParams
* Some bugs fixed
* **v0.6.4**
* Automatical Read/Write seperatelly
* Query/QueryString/QueryInterface and action with Where/And
* Get support non-struct variables
* BufferSize on Iterate
* fix some other bugs.
* **v0.6.3**
* merge tests to main project
* add `Exist` function
* add `SumInt` function
* Mysql now support read and create column comment.
* fix time related bugs.
* fix some other bugs.
* **v0.6.2**
* refactor tag parse methods
* add Scan features to Get
* add QueryString method
* **v0.4.5**
* many bugs fixed
* extends support unlimited deep
* Delete Limit support
* **v0.4.4**
* ql database expriment support
* tidb database expriment support
* sql.NullString and etc. field support
* select ForUpdate support
* many bugs fixed
* **v0.4.3**
* Json column type support
* oracle expirement support
* bug fixed
* **v0.4.2**
* Transaction will auto rollback if not Rollback or Commit be called.
* Gonic Mapper support
* bug fixed
* **v0.4.1**
* deleted tag support for soft delete
* bug fixed
* **v0.4.0 RC1**
Changes:
* moved xorm cmd to [github.com/go-xorm/cmd](github.com/go-xorm/cmd)
* refactored general DB operation a core lib at [github.com/go-xorm/core](https://github.com/go-xorm/core)
* moved tests to github.com/go-xorm/tests [github.com/go-xorm/tests](github.com/go-xorm/tests)
Improvements:
* Prepared statement cache
* Add Incr API
* Specify Timezone Location
* **v0.3.2**
Improvements:
* Add AllCols & MustCols function
* Add TableName for custom table name
Bug Fixes:
* #46
* #51
* #53
* #89
* #86
* #92
* **v0.3.1**
Features:
* Support MSSQL DB via ODBC driver ([github.com/lunny/godbc](https://github.com/lunny/godbc));
* Composite Key, using multiple pk xorm tag
* Added Row() API as alternative to Iterate() API for traversing result set, provide similar usages to sql.Rows type
* ORM struct allowed declaration of pointer builtin type as members to allow null DB fields
* Before and After Event processors
Improvements:
* Allowed int/int32/int64/uint/uint32/uint64/string as Primary Key type
* Performance improvement for Get()/Find()/Iterate()
* **v0.2.3** : Improved documents; Optimistic Locking support; Timestamp with time zone support; Mapper change to tableMapper and columnMapper & added PrefixMapper & SuffixMapper support custom table or column name's prefix and suffix;Insert now return affected, err instead of id, err; Added UseBool & Distinct;
* **v0.2.2** : Postgres drivers now support lib/pq; Added method Iterate for record by record to handler；Added SetMaxConns(go1.2+) support; some bugs fixed.
* **v0.2.1** : Added database reverse tool, now support generate go & c++ codes, see [Xorm Tool README](https://github.com/go-xorm/xorm/blob/master/xorm/README.md); some bug fixed.
* **v0.2.0** : Added Cache supported, select is speeder up 3~5x; Added SameMapper for same name between struct and table; Added Sync method for auto added tables, columns, indexes;
* **v0.1.9** : Added postgres and mymysql supported; Added ` and ? supported on Raw SQL even if postgres; Added Cols, StoreEngine, Charset function, Added many column data type supported, please see [Mapping Rules](#mapping).
* **v0.1.8** : Added union index and union unique supported, please see [Mapping Rules](#mapping).
* **v0.1.7** : Added IConnectPool interface and NoneConnectPool, SysConnectPool, SimpleConnectPool the three implements. You can choose one of them and the default is SysConnectPool. You can customrize your own connection pool. struct Engine added Close method, It should be invoked before system exit.
* **v0.1.6** : Added conversion interface support; added struct derive support; added single mapping support
* **v0.1.5** : Added multi threads support; added Sql() function for struct query; Get function changed return inteface; MakeSession and Create are instead with NewSession and NewEngine.
* **v0.1.4** : Added simple cascade load support; added more data type supports.
* **v0.1.3** : Find function now supports both slice and map; Add Table function for multi tables and temperory tables support
* **v0.1.2** : Insert function now supports both struct and slice pointer parameters, batch inserting and auto transaction
* **v0.1.1** : Add Id, In functions and improved README
* **v0.1.0** : Initial release.

41
vendor/xorm.io/xorm/CONTRIBUTING.md generated vendored
View File

@ -22,6 +22,47 @@ e.g.,
// !lunny! this is comments made by lunny
```
### Build xorm and test it locally
Once you write some codes on your feature branch, you could build and test locally at first. Just
```
make build
```
and
```
make test
```
The `make test` is an alias of `make test-sqlite`, it will run the tests on a sqlite database file. No extra thing needed to do except you need to cgo compile enviroment.
If you write a new test method, you could run
```
make test-sqlite#TestMyNewMethod
```
that will only run the special test method.
If you want to run another datase, you have to prepare a running database at first, and then, you could
```
TEST_MYSQL_HOST= TEST_MYSQL_CHARSET= TEST_MYSQL_DBNAME= TEST_MYSQL_USERNAME= TEST_MYSQL_PASSWORD= make test-mysql
```
or other databases:
```
TEST_MSSQL_HOST= TEST_MSSQL_DBNAME= TEST_MSSQL_USERNAME= TEST_MSSQL_PASSWORD= make test-mssql
```
```
TEST_PGSQL_HOST= TEST_PGSQL_SCHEMA= TEST_PGSQL_DBNAME= TEST_PGSQL_USERNAME= TEST_PGSQL_PASSWORD= make test-postgres
```
```
TEST_TIDB_HOST= TEST_TIDB_DBNAME= TEST_TIDB_USERNAME= TEST_TIDB_PASSWORD= make test-tidb
```
And if your branch is related with cache, you could also enable it via `TEST_CACHE_ENABLE=true`.
### Patch review
Help review existing open [pull requests](https://help.github.com/articles/using-pull-requests) by commenting on the code or

214
vendor/xorm.io/xorm/Makefile generated vendored Normal file
View File

@ -0,0 +1,214 @@
IMPORT := xorm.io/xorm
export GO111MODULE=on
GO ?= go
GOFMT ?= gofmt -s
TAGS ?=
SED_INPLACE := sed -i
GOFILES := $(shell find . -name "*.go" -type f)
PACKAGES ?= $(shell GO111MODULE=on $(GO) list ./...)
TEST_COCKROACH_HOST ?= cockroach:26257
TEST_COCKROACH_SCHEMA ?=
TEST_COCKROACH_DBNAME ?= xorm_test
TEST_COCKROACH_USERNAME ?= postgres
TEST_COCKROACH_PASSWORD ?=
TEST_MSSQL_HOST ?= mssql:1433
TEST_MSSQL_DBNAME ?= gitea
TEST_MSSQL_USERNAME ?= sa
TEST_MSSQL_PASSWORD ?= MwantsaSecurePassword1
TEST_MYSQL_HOST ?= mysql:3306
TEST_MYSQL_CHARSET ?= utf8
TEST_MYSQL_DBNAME ?= xorm_test
TEST_MYSQL_USERNAME ?= root
TEST_MYSQL_PASSWORD ?=
TEST_PGSQL_HOST ?= pgsql:5432
TEST_PGSQL_SCHEMA ?=
TEST_PGSQL_DBNAME ?= xorm_test
TEST_PGSQL_USERNAME ?= postgres
TEST_PGSQL_PASSWORD ?= mysecretpassword
TEST_TIDB_HOST ?= tidb:4000
TEST_TIDB_DBNAME ?= xorm_test
TEST_TIDB_USERNAME ?= root
TEST_TIDB_PASSWORD ?=
TEST_CACHE_ENABLE ?= false
TEST_QUOTE_POLICY ?= always
.PHONY: all
all: build
.PHONY: build
build: go-check $(GO_SOURCES)
$(GO) build
.PHONY: clean
clean:
$(GO) clean -i ./...
rm -rf *.sql *.log test.db *coverage.out coverage.all
.PHONY: coverage
coverage:
@hash gocovmerge > /dev/null 2>&1; if [ $$? -ne 0 ]; then \
$(GO) get -u github.com/wadey/gocovmerge; \
fi
gocovmerge $(shell find . -type f -name "coverage.out") > coverage.all;\
.PHONY: fmt
fmt:
$(GOFMT) -w $(GOFILES)
.PHONY: fmt-check
fmt-check:
# get all go files and run go fmt on them
@diff=$$($(GOFMT) -d $(GOFILES)); \
if [ -n "$$diff" ]; then \
echo "Please run 'make fmt' and commit the result:"; \
echo "$${diff}"; \
exit 1; \
fi;
.PHONY: go-check
go-check:
$(eval GO_VERSION := $(shell printf "%03d%03d%03d" $(shell go version | grep -Eo '[0-9]+\.?[0-9]+?\.?[0-9]?\s' | tr '.' ' ');))
@if [ "$(GO_VERSION)" -lt "001011000" ]; then \
echo "Gitea requires Go 1.11.0 or greater to build. You can get it at https://golang.org/dl/"; \
exit 1; \
fi
.PHONY: help
help:
@echo "Make Routines:"
@echo " - equivalent to \"build\""
@echo " - build creates the entire project"
@echo " - clean delete integration files and build files but not css and js files"
@echo " - fmt format the code"
@echo " - lint run code linter revive"
@echo " - misspell check if a word is written wrong"
@echo " - test run default unit test"
@echo " - test-sqlite run unit test for sqlite"
@echo " - vet examines Go source code and reports suspicious constructs"
.PHONY: lint
lint: revive
.PHONY: revive
revive:
@hash revive > /dev/null 2>&1; if [ $$? -ne 0 ]; then \
$(GO) get -u github.com/mgechev/revive; \
fi
revive -config .revive.toml -exclude=./vendor/... ./... || exit 1
.PHONY: misspell
misspell:
@hash misspell > /dev/null 2>&1; if [ $$? -ne 0 ]; then \
$(GO) get -u github.com/client9/misspell/cmd/misspell; \
fi
misspell -w -i unknwon $(GOFILES)
.PHONY: misspell-check
misspell-check:
@hash misspell > /dev/null 2>&1; if [ $$? -ne 0 ]; then \
$(GO) get -u github.com/client9/misspell/cmd/misspell; \
fi
misspell -error -i unknwon,destory $(GOFILES)
.PHONY: test
test: test-sqlite
.PNONY: test-cockroach
test-cockroach: go-check
$(GO) test -race -db=postgres -schema='$(TEST_COCKROACH_SCHEMA)' -cache=$(TEST_CACHE_ENABLE) \
-conn_str="postgres://$(TEST_COCKROACH_USERNAME):$(TEST_COCKROACH_PASSWORD)@$(TEST_COCKROACH_HOST)/$(TEST_COCKROACH_DBNAME)?sslmode=disable&experimental_serial_normalization=sql_sequence" \
-ignore_update_limit=true -coverprofile=cockroach.$(TEST_COCKROACH_SCHEMA).$(TEST_CACHE_ENABLE).coverage.out -covermode=atomic
.PHONY: test-cockroach\#%
test-cockroach\#%: go-check
$(GO) test -race -run $* -db=postgres -schema='$(TEST_COCKROACH_SCHEMA)' -cache=$(TEST_CACHE_ENABLE) \
-conn_str="postgres://$(TEST_COCKROACH_USERNAME):$(TEST_COCKROACH_PASSWORD)@$(TEST_COCKROACH_HOST)/$(TEST_COCKROACH_DBNAME)?sslmode=disable&experimental_serial_normalization=sql_sequence" \
-ignore_update_limit=true -coverprofile=cockroach.$(TEST_COCKROACH_SCHEMA).$(TEST_CACHE_ENABLE).coverage.out -covermode=atomic
.PNONY: test-mssql
test-mssql: go-check
$(GO) test -v -race -db=mssql -cache=$(TEST_CACHE_ENABLE) -quote=$(TEST_QUOTE_POLICY) \
-conn_str="server=$(TEST_MSSQL_HOST);user id=$(TEST_MSSQL_USERNAME);password=$(TEST_MSSQL_PASSWORD);database=$(TEST_MSSQL_DBNAME)" \
-coverprofile=mssql.$(TEST_QUOTE_POLICY).$(TEST_CACHE_ENABLE).coverage.out -covermode=atomic
.PNONY: test-mssql\#%
test-mssql\#%: go-check
$(GO) test -v -race -run $* -db=mssql -cache=$(TEST_CACHE_ENABLE) -quote=$(TEST_QUOTE_POLICY) \
-conn_str="server=$(TEST_MSSQL_HOST);user id=$(TEST_MSSQL_USERNAME);password=$(TEST_MSSQL_PASSWORD);database=$(TEST_MSSQL_DBNAME)" \
-coverprofile=mssql.$(TEST_QUOTE_POLICY).$(TEST_CACHE_ENABLE).coverage.out -covermode=atomic
.PNONY: test-mymysql
test-mymysql: go-check
$(GO) test -v -race -db=mymysql -cache=$(TEST_CACHE_ENABLE) -quote=$(TEST_QUOTE_POLICY) \
-conn_str="tcp:$(TEST_MYSQL_HOST)*$(TEST_MYSQL_DBNAME)/$(TEST_MYSQL_USERNAME)/$(TEST_MYSQL_PASSWORD)" \
-coverprofile=mymysql.$(TEST_QUOTE_POLICY).$(TEST_CACHE_ENABLE).coverage.out -covermode=atomic
.PNONY: test-mymysql\#%
test-mymysql\#%: go-check
$(GO) test -v -race -run $* -db=mymysql -cache=$(TEST_CACHE_ENABLE) -quote=$(TEST_QUOTE_POLICY) \
-conn_str="tcp:$(TEST_MYSQL_HOST)*$(TEST_MYSQL_DBNAME)/$(TEST_MYSQL_USERNAME)/$(TEST_MYSQL_PASSWORD)" \
-coverprofile=mymysql.$(TEST_QUOTE_POLICY).$(TEST_CACHE_ENABLE).coverage.out -covermode=atomic
.PNONY: test-mysql
test-mysql: go-check
$(GO) test -v -race -db=mysql -cache=$(TEST_CACHE_ENABLE) -quote=$(TEST_QUOTE_POLICY) \
-conn_str="$(TEST_MYSQL_USERNAME):$(TEST_MYSQL_PASSWORD)@tcp($(TEST_MYSQL_HOST))/$(TEST_MYSQL_DBNAME)?charset=$(TEST_MYSQL_CHARSET)" \
-coverprofile=mysql.$(TEST_QUOTE_POLICY).$(TEST_CACHE_ENABLE).coverage.out -covermode=atomic
.PHONY: test-mysql\#%
test-mysql\#%: go-check
$(GO) test -v -race -run $* -db=mysql -cache=$(TEST_CACHE_ENABLE) -quote=$(TEST_QUOTE_POLICY) \
-conn_str="$(TEST_MYSQL_USERNAME):$(TEST_MYSQL_PASSWORD)@tcp($(TEST_MYSQL_HOST))/$(TEST_MYSQL_DBNAME)?charset=$(TEST_MYSQL_CHARSET)" \
-coverprofile=mysql.$(TEST_QUOTE_POLICY).$(TEST_CACHE_ENABLE).coverage.out -covermode=atomic
.PNONY: test-postgres
test-postgres: go-check
$(GO) test -v -race -db=postgres -schema='$(TEST_PGSQL_SCHEMA)' -cache=$(TEST_CACHE_ENABLE) \
-conn_str="postgres://$(TEST_PGSQL_USERNAME):$(TEST_PGSQL_PASSWORD)@$(TEST_PGSQL_HOST)/$(TEST_PGSQL_DBNAME)?sslmode=disable" \
-quote=$(TEST_QUOTE_POLICY) -coverprofile=postgres.$(TEST_QUOTE_POLICY).$(TEST_CACHE_ENABLE).coverage.out -covermode=atomic
.PHONY: test-postgres\#%
test-postgres\#%: go-check
$(GO) test -v -race -run $* -db=postgres -schema='$(TEST_PGSQL_SCHEMA)' -cache=$(TEST_CACHE_ENABLE) \
-conn_str="postgres://$(TEST_PGSQL_USERNAME):$(TEST_PGSQL_PASSWORD)@$(TEST_PGSQL_HOST)/$(TEST_PGSQL_DBNAME)?sslmode=disable" \
-quote=$(TEST_QUOTE_POLICY) -coverprofile=postgres.$(TEST_QUOTE_POLICY).$(TEST_CACHE_ENABLE).coverage.out -covermode=atomic
.PHONY: test-sqlite
test-sqlite: go-check
$(GO) test -v -race -cache=$(TEST_CACHE_ENABLE) -db=sqlite3 -conn_str="./test.db?cache=shared&mode=rwc" \
-quote=$(TEST_QUOTE_POLICY) -coverprofile=sqlite.$(TEST_QUOTE_POLICY).$(TEST_CACHE_ENABLE).coverage.out -covermode=atomic
.PHONY: test-sqlite-schema
test-sqlite-schema: go-check
$(GO) test -v -race -schema=xorm -cache=$(TEST_CACHE_ENABLE) -db=sqlite3 -conn_str="./test.db?cache=shared&mode=rwc" \
-quote=$(TEST_QUOTE_POLICY) -coverprofile=sqlite.$(TEST_QUOTE_POLICY).$(TEST_CACHE_ENABLE).coverage.out -covermode=atomic
.PHONY: test-sqlite\#%
test-sqlite\#%: go-check
$(GO) test -v -race -run $* -cache=$(TEST_CACHE_ENABLE) -db=sqlite3 -conn_str="./test.db?cache=shared&mode=rwc" \
-quote=$(TEST_QUOTE_POLICY) -coverprofile=sqlite.$(TEST_QUOTE_POLICY).$(TEST_CACHE_ENABLE).coverage.out -covermode=atomic
.PNONY: test-tidb
test-tidb: go-check
$(GO) test -v -race -db=mysql -cache=$(TEST_CACHE_ENABLE) -ignore_select_update=true \
-conn_str="$(TEST_TIDB_USERNAME):$(TEST_TIDB_PASSWORD)@tcp($(TEST_TIDB_HOST))/$(TEST_TIDB_DBNAME)" \
-quote=$(TEST_QUOTE_POLICY) -coverprofile=tidb.$(TEST_QUOTE_POLICY).$(TEST_CACHE_ENABLE).coverage.out -covermode=atomic
.PHONY: test-tidb\#%
test-tidb\#%: go-check
$(GO) test -v -race -run $* -db=mysql -cache=$(TEST_CACHE_ENABLE) -ignore_select_update=true \
-conn_str="$(TEST_TIDB_USERNAME):$(TEST_TIDB_PASSWORD)@tcp($(TEST_TIDB_HOST))/$(TEST_TIDB_DBNAME)" \
-quote=$(TEST_QUOTE_POLICY) -coverprofile=tidb.$(TEST_QUOTE_POLICY).$(TEST_CACHE_ENABLE).coverage.out -covermode=atomic
.PHONY: vet
vet:
$(GO) vet $(PACKAGES)

67
vendor/xorm.io/xorm/README.md generated vendored
View File

@ -8,51 +8,50 @@ Xorm is a simple and powerful ORM for Go.
[![](https://goreportcard.com/badge/xorm.io/xorm)](https://goreportcard.com/report/xorm.io/xorm)
[![Join the chat at https://img.shields.io/discord/323460943201959939.svg](https://img.shields.io/discord/323460943201959939.svg)](https://discord.gg/HuR2CF3)
## Notice
v1.0.0 has some break changes from v0.8.2.
- Removed some non gonic function name `Id`, `Sql`, please use `ID`, `SQL` instead.
- Removed the dependent from `xorm.io/core` and moved the codes to `xorm.io/xorm/core`, `xorm.io/xorm/names`, `xorm.io/xorm/schemas` and others.
- Renamed some interface names. i.e. `core.IMapper` -> `names.Mapper`, `core.ILogger` -> `log.Logger`.
## Features
* Struct <-> Table Mapping Support
* Chainable APIs
* Transaction Support
* Both ORM and raw SQL operation Support
* Sync database schema Support
* Query Cache speed up
* Database Reverse support, See [Xorm Tool README](https://github.com/go-xorm/cmd/blob/master/README.md)
* Database Reverse support via [xorm.io/reverse](https://xorm.io/reverse)
* Simple cascade loading support
* Optimistic Locking support
* SQL Builder support via [xorm.io/builder](https://xorm.io/builder)
* Automatical Read/Write seperatelly
* Postgres schema support
* Context Cache support
* Support log/SQLLog context
## Drivers Support
Drivers for Go's sql package which currently support database/sql includes:
* Mysql: [github.com/go-sql-driver/mysql](https://github.com/go-sql-driver/mysql)
* [Mysql5.*](https://github.com/mysql/mysql-server/tree/5.7) / [Mysql8.*](https://github.com/mysql/mysql-server) / [Mariadb](https://github.com/MariaDB/server) / [Tidb](https://github.com/pingcap/tidb)
- [github.com/go-sql-driver/mysql](https://github.com/go-sql-driver/mysql)
- [github.com/ziutek/mymysql/godrv](https://github.com/ziutek/mymysql/godrv)
* MyMysql: [github.com/ziutek/mymysql/godrv](https://github.com/ziutek/mymysql/tree/master/godrv)
* [Postgres](https://github.com/postgres/postgres) / [Cockroach](https://github.com/cockroachdb/cockroach)
- [github.com/lib/pq](https://github.com/lib/pq)
* Postgres: [github.com/lib/pq](https://github.com/lib/pq)
* [SQLite](https://sqlite.org)
- [github.com/mattn/go-sqlite3](https://github.com/mattn/go-sqlite3)
* Tidb: [github.com/pingcap/tidb](https://github.com/pingcap/tidb)
* MsSql
- [github.com/denisenkom/go-mssqldb](https://github.com/denisenkom/go-mssqldb)
* SQLite: [github.com/mattn/go-sqlite3](https://github.com/mattn/go-sqlite3)
* MsSql: [github.com/denisenkom/go-mssqldb](https://github.com/denisenkom/go-mssqldb)
* Oracle: [github.com/mattn/go-oci8](https://github.com/mattn/go-oci8) (experiment)
* Oracle
- [github.com/mattn/go-oci8](https://github.com/mattn/go-oci8) (experiment)
## Installation
@ -62,7 +61,7 @@ Drivers for Go's sql package which currently support database/sql includes:
* [Manual](http://xorm.io/docs)
* [GoDoc](http://godoc.org/xorm.io/xorm)
* [GoDoc](http://pkg.go.dev/xorm.io/xorm)
## Quick Start
@ -440,27 +439,7 @@ Support this project by becoming a sponsor. Your logo will show up here with a l
## Changelog
* **v0.7.0**
* Some bugs fixed
* **v0.6.6**
* Some bugs fixed
* **v0.6.5**
* Postgres schema support
* vgo support
* Add FindAndCount
* Database special params support via NewEngineWithParams
* Some bugs fixed
* **v0.6.4**
* Automatical Read/Write seperatelly
* Query/QueryString/QueryInterface and action with Where/And
* Get support non-struct variables
* BufferSize on Iterate
* fix some other bugs.
[More changes ...](https://github.com/go-xorm/manual-en-US/tree/master/chapter-16)
You can find all the changelog [here](CHANGELOG.md)
## Cases

82
vendor/xorm.io/xorm/README_CN.md generated vendored
View File

@ -2,57 +2,55 @@
[English](https://gitea.com/xorm/xorm/src/branch/master/README.md)
xorm是一个简单而强大的Go语言ORM库. 通过它可以使数据库操作非常简便。
xorm 是一个简单而强大的Go语言ORM库. 通过它可以使数据库操作非常简便。
[![Build Status](https://drone.gitea.com/api/badges/xorm/builder/status.svg)](https://drone.gitea.com/xorm/builder) [![](http://gocover.io/_badge/xorm.io/xorm)](https://gocover.io/xorm.io/xorm)
[![Build Status](https://drone.gitea.com/api/badges/xorm/xorm/status.svg)](https://drone.gitea.com/xorm/xorm) [![](http://gocover.io/_badge/xorm.io/xorm)](https://gocover.io/xorm.io/xorm)
[![](https://goreportcard.com/badge/xorm.io/xorm)](https://goreportcard.com/report/xorm.io/xorm)
[![Join the chat at https://img.shields.io/discord/323460943201959939.svg](https://img.shields.io/discord/323460943201959939.svg)](https://discord.gg/HuR2CF3)
## Notice
v1.0.0 相对于 v0.8.2 有以下不兼容的变更：
- 移除了部分不符合Go语言命名的函数，如 `Id`, `Sql`，请使用 `ID`, `SQL` 替代。
- 删除了对 `xorm.io/core` 的依赖。大部分代码迁移到了 `xorm.io/xorm/core`, `xorm.io/xorm/names`, `xorm.io/xorm/schemas` 等等几个包中.
- 重命名了几个结构体，如： `core.IMapper` -> `names.Mapper`, `core.ILogger` -> `log.Logger`.
## 特性
* 支持Struct和数据库表之间的灵活映射，并支持自动同步
* 支持 Struct 和数据库表之间的灵活映射，并支持自动同步
* 事务支持
* 同时支持原始SQL语句和ORM操作的混合执行
* 使用连写来简化调用
* 支持使用Id, In, Where, Limit, Join, Having, Table, Sql, Cols等函数和结构体等方式作为条件
* 支持使用ID, In, Where, Limit, Join, Having, Table, SQL, Cols等函数和结构体等方式作为条件
* 支持级联加载Struct
* Schema支持（仅Postgres）
* 支持缓存
* 支持根据数据库自动生成xorm的结构体
* 通过 [xorm.io/reverse](https://xorm.io/reverse) 支持根据数据库自动生成 xorm 结构体
* 支持记录版本（即乐观锁）
* 内置SQL Builder支持
* 通过 [xorm.io/builder](https://xorm.io/builder) 内置 SQL Builder 支持
* 上下文缓存支持
* 支持日志上下文
## 驱动支持
目前支持的Go数据库驱动和对应的数据库如下：
* Mysql: [github.com/go-sql-driver/mysql](https://github.com/go-sql-driver/mysql)
* [Mysql5.*](https://github.com/mysql/mysql-server/tree/5.7) / [Mysql8.*](https://github.com/mysql/mysql-server) / [Mariadb](https://github.com/MariaDB/server) / [Tidb](https://github.com/pingcap/tidb)
- [github.com/go-sql-driver/mysql](https://github.com/go-sql-driver/mysql)
- [github.com/ziutek/mymysql/godrv](https://github.com/ziutek/mymysql/godrv)
* MyMysql: [github.com/ziutek/mymysql/godrv](https://github.com/ziutek/mymysql/godrv)
* [Postgres](https://github.com/postgres/postgres) / [Cockroach](https://github.com/cockroachdb/cockroach)
- [github.com/lib/pq](https://github.com/lib/pq)
* Postgres: [github.com/lib/pq](https://github.com/lib/pq)
* [SQLite](https://sqlite.org)
- [github.com/mattn/go-sqlite3](https://github.com/mattn/go-sqlite3)
* Tidb: [github.com/pingcap/tidb](https://github.com/pingcap/tidb)
* MsSql
- [github.com/denisenkom/go-mssqldb](https://github.com/denisenkom/go-mssqldb)
* SQLite: [github.com/mattn/go-sqlite3](https://github.com/mattn/go-sqlite3)
* MsSql: [github.com/denisenkom/go-mssqldb](https://github.com/denisenkom/go-mssqldb)
* MsSql: [github.com/lunny/godbc](https://github.com/lunny/godbc)
* Oracle: [github.com/mattn/go-oci8](https://github.com/mattn/go-oci8) (试验性支持)
* Oracle
- [github.com/mattn/go-oci8](https://github.com/mattn/go-oci8) (试验性支持)
## 安装
@ -62,7 +60,7 @@ xorm是一个简单而强大的Go语言ORM库. 通过它可以使数据库操作
* [操作指南](http://xorm.io/docs)
* [Godoc代码文档](http://godoc.org/xorm.io/xorm)
* [Godoc代码文档](http://pkg.go.dev/xorm.io/xorm)
# 快速开始
@ -435,14 +433,14 @@ res, err := engine.Transaction(func(session *xorm.Session) (interface{}, error)
# 案例
* [Go语言中文网](http://studygolang.com/) - [github.com/studygolang/studygolang](https://github.com/studygolang/studygolang)
* [Gitea](http://gitea.io) - [github.com/go-gitea/gitea](http://github.com/go-gitea/gitea)
* [Gogs](http://try.gogits.org) - [github.com/gogits/gogs](http://github.com/gogits/gogs)
* [grafana](https://grafana.com/) - [github.com/grafana/grafana](http://github.com/grafana/grafana)
* [Go语言中文网](http://studygolang.com/) - [github.com/studygolang/studygolang](https://github.com/studygolang/studygolang)
* [github.com/m3ng9i/qreader](https://github.com/m3ng9i/qreader)
* [Wego](http://github.com/go-tango/wego)
@ -470,27 +468,7 @@ res, err := engine.Transaction(func(session *xorm.Session) (interface{}, error)
## 更新日志
* **v0.7.0**
* 修正部分Bug
* **v0.6.6**
* 修正部分Bug
* **v0.6.5**
* 通过 engine.SetSchema 来支持 schema，当前仅支持Postgres
* vgo 支持
* 新增 `FindAndCount` 函数
* 通过 `NewEngineWithParams` 支持数据库特别参数
* 修正部分Bug
* **v0.6.4**
* 自动读写分离支持
* Query/QueryString/QueryInterface 支持与 Where/And 合用
* `Get` 支持获取非结构体变量
* `Iterate` 支持 `BufferSize`
* 修正部分Bug
[更多更新日志...](https://github.com/go-xorm/manual-zh-CN/tree/master/chapter-16)
请访问 [CHANGELOG.md](CHANGELOG.md) 获得更新日志。
## LICENSE

99
vendor/xorm.io/xorm/caches/cache.go generated vendored Normal file
View File

@ -0,0 +1,99 @@
// Copyright 2019 The Xorm Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package caches
import (
"bytes"
"encoding/gob"
"errors"
"fmt"
"strings"
"time"
"xorm.io/xorm/schemas"
)
const (
// CacheExpired is default cache expired time
CacheExpired = 60 * time.Minute
// CacheMaxMemory is not use now
CacheMaxMemory = 256
// CacheGcInterval represents interval time to clear all expired nodes
CacheGcInterval = 10 * time.Minute
// CacheGcMaxRemoved represents max nodes removed when gc
CacheGcMaxRemoved = 20
)
// list all the errors
var (
ErrCacheMiss = errors.New("xorm/cache: key not found")
ErrNotStored = errors.New("xorm/cache: not stored")
// ErrNotExist record does not exist error
ErrNotExist = errors.New("Record does not exist")
)
// CacheStore is a interface to store cache
type CacheStore interface {
// key is primary key or composite primary key
// value is struct's pointer
// key format : <tablename>-p-<pk1>-<pk2>...
Put(key string, value interface{}) error
Get(key string) (interface{}, error)
Del(key string) error
}
// Cacher is an interface to provide cache
// id format : u-<pk1>-<pk2>...
type Cacher interface {
GetIds(tableName, sql string) interface{}
GetBean(tableName string, id string) interface{}
PutIds(tableName, sql string, ids interface{})
PutBean(tableName string, id string, obj interface{})
DelIds(tableName, sql string)
DelBean(tableName string, id string)
ClearIds(tableName string)
ClearBeans(tableName string)
}
func encodeIds(ids []schemas.PK) (string, error) {
buf := new(bytes.Buffer)
enc := gob.NewEncoder(buf)
err := enc.Encode(ids)
return buf.String(), err
}
func decodeIds(s string) ([]schemas.PK, error) {
pks := make([]schemas.PK, 0)
dec := gob.NewDecoder(strings.NewReader(s))
err := dec.Decode(&pks)
return pks, err
}
// GetCacheSql returns cacher PKs via SQL
func GetCacheSql(m Cacher, tableName, sql string, args interface{}) ([]schemas.PK, error) {
bytes := m.GetIds(tableName, GenSqlKey(sql, args))
if bytes == nil {
return nil, errors.New("Not Exist")
}
return decodeIds(bytes.(string))
}
// PutCacheSql puts cacher SQL and PKs
func PutCacheSql(m Cacher, ids []schemas.PK, tableName, sql string, args interface{}) error {
bytes, err := encodeIds(ids)
if err != nil {
return err
}
m.PutIds(tableName, GenSqlKey(sql, args), bytes)
return nil
}
// GenSqlKey generates cache key
func GenSqlKey(sql string, args interface{}) string {
return fmt.Sprintf("%v-%v", sql, args)
}

Some files were not shown because too many files have changed in this diff Show More