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Dump: add output format tar and output to stdout (#10376)
* Dump: Use mholt/archive/v3 to support tar including many compressions Signed-off-by: Philipp Homann <homann.philipp@googlemail.com> * Dump: Allow dump output to stdout Signed-off-by: Philipp Homann <homann.philipp@googlemail.com> * Dump: Fixed bug present since #6677 where SessionConfig.Provider is never "file" Signed-off-by: Philipp Homann <homann.philipp@googlemail.com> * Dump: never pack RepoRootPath, LFS.ContentPath and LogRootPath when they are below AppDataPath Signed-off-by: Philipp Homann <homann.philipp@googlemail.com> * Dump: also dump LFS (fixes #10058) Signed-off-by: Philipp Homann <homann.philipp@googlemail.com> * Dump: never dump CustomPath if CustomPath is a subdir of or equal to AppDataPath (fixes #10365) Signed-off-by: Philipp Homann <homann.philipp@googlemail.com> * Use log.Info instead of fmt.Fprintf Signed-off-by: Philipp Homann <homann.philipp@googlemail.com> * import ordering * make fmt Co-authored-by: zeripath <art27@cantab.net> Co-authored-by: techknowlogick <techknowlogick@gitea.io> Co-authored-by: Matti R <matti@mdranta.net>
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PhilippHomann
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158
vendor/github.com/klauspost/compress/zstd/fse_predefined.go
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vendored
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158
vendor/github.com/klauspost/compress/zstd/fse_predefined.go
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// Copyright 2019+ Klaus Post. All rights reserved.
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// License information can be found in the LICENSE file.
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// Based on work by Yann Collet, released under BSD License.
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package zstd
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import (
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"fmt"
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"math"
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"sync"
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)
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var (
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// fsePredef are the predefined fse tables as defined here:
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// https://github.com/facebook/zstd/blob/dev/doc/zstd_compression_format.md#default-distributions
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// These values are already transformed.
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fsePredef [3]fseDecoder
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// fsePredefEnc are the predefined encoder based on fse tables as defined here:
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// https://github.com/facebook/zstd/blob/dev/doc/zstd_compression_format.md#default-distributions
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// These values are already transformed.
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fsePredefEnc [3]fseEncoder
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// symbolTableX contain the transformations needed for each type as defined in
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// https://github.com/facebook/zstd/blob/dev/doc/zstd_compression_format.md#the-codes-for-literals-lengths-match-lengths-and-offsets
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symbolTableX [3][]baseOffset
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// maxTableSymbol is the biggest supported symbol for each table type
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// https://github.com/facebook/zstd/blob/dev/doc/zstd_compression_format.md#the-codes-for-literals-lengths-match-lengths-and-offsets
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maxTableSymbol = [3]uint8{tableLiteralLengths: maxLiteralLengthSymbol, tableOffsets: maxOffsetLengthSymbol, tableMatchLengths: maxMatchLengthSymbol}
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// bitTables is the bits table for each table.
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bitTables = [3][]byte{tableLiteralLengths: llBitsTable[:], tableOffsets: nil, tableMatchLengths: mlBitsTable[:]}
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)
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type tableIndex uint8
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const (
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// indexes for fsePredef and symbolTableX
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tableLiteralLengths tableIndex = 0
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tableOffsets tableIndex = 1
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tableMatchLengths tableIndex = 2
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maxLiteralLengthSymbol = 35
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maxOffsetLengthSymbol = 30
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maxMatchLengthSymbol = 52
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)
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// baseOffset is used for calculating transformations.
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type baseOffset struct {
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baseLine uint32
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addBits uint8
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}
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// fillBase will precalculate base offsets with the given bit distributions.
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func fillBase(dst []baseOffset, base uint32, bits ...uint8) {
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if len(bits) != len(dst) {
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panic(fmt.Sprintf("len(dst) (%d) != len(bits) (%d)", len(dst), len(bits)))
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}
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for i, bit := range bits {
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if base > math.MaxInt32 {
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panic(fmt.Sprintf("invalid decoding table, base overflows int32"))
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}
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dst[i] = baseOffset{
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baseLine: base,
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addBits: bit,
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}
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base += 1 << bit
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}
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}
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var predef sync.Once
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func initPredefined() {
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predef.Do(func() {
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// Literals length codes
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tmp := make([]baseOffset, 36)
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for i := range tmp[:16] {
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tmp[i] = baseOffset{
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baseLine: uint32(i),
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addBits: 0,
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}
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}
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fillBase(tmp[16:], 16, 1, 1, 1, 1, 2, 2, 3, 3, 4, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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symbolTableX[tableLiteralLengths] = tmp
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// Match length codes
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tmp = make([]baseOffset, 53)
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for i := range tmp[:32] {
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tmp[i] = baseOffset{
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// The transformation adds the 3 length.
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baseLine: uint32(i) + 3,
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addBits: 0,
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}
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}
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fillBase(tmp[32:], 35, 1, 1, 1, 1, 2, 2, 3, 3, 4, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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symbolTableX[tableMatchLengths] = tmp
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// Offset codes
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tmp = make([]baseOffset, maxOffsetBits+1)
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tmp[1] = baseOffset{
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baseLine: 1,
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addBits: 1,
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}
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fillBase(tmp[2:], 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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symbolTableX[tableOffsets] = tmp
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// Fill predefined tables and transform them.
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// https://github.com/facebook/zstd/blob/dev/doc/zstd_compression_format.md#default-distributions
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for i := range fsePredef[:] {
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f := &fsePredef[i]
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switch tableIndex(i) {
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case tableLiteralLengths:
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// https://github.com/facebook/zstd/blob/ededcfca57366461021c922720878c81a5854a0a/lib/decompress/zstd_decompress_block.c#L243
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f.actualTableLog = 6
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copy(f.norm[:], []int16{4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 2, 1, 1, 1, 1, 1,
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-1, -1, -1, -1})
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f.symbolLen = 36
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case tableOffsets:
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// https://github.com/facebook/zstd/blob/ededcfca57366461021c922720878c81a5854a0a/lib/decompress/zstd_decompress_block.c#L281
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f.actualTableLog = 5
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copy(f.norm[:], []int16{
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1, 1, 1, 1, 1, 1, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, -1, -1, -1, -1, -1})
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f.symbolLen = 29
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case tableMatchLengths:
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//https://github.com/facebook/zstd/blob/ededcfca57366461021c922720878c81a5854a0a/lib/decompress/zstd_decompress_block.c#L304
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f.actualTableLog = 6
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copy(f.norm[:], []int16{
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1, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, -1, -1,
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-1, -1, -1, -1, -1})
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f.symbolLen = 53
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}
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if err := f.buildDtable(); err != nil {
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panic(fmt.Errorf("building table %v: %v", tableIndex(i), err))
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}
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if err := f.transform(symbolTableX[i]); err != nil {
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panic(fmt.Errorf("building table %v: %v", tableIndex(i), err))
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}
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f.preDefined = true
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// Create encoder as well
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enc := &fsePredefEnc[i]
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copy(enc.norm[:], f.norm[:])
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enc.symbolLen = f.symbolLen
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enc.actualTableLog = f.actualTableLog
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if err := enc.buildCTable(); err != nil {
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panic(fmt.Errorf("building encoding table %v: %v", tableIndex(i), err))
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}
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enc.setBits(bitTables[i])
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enc.preDefined = true
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}
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})
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}
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