mirror of
https://github.com/containers/skopeo.git
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Image encryption/decryption support in skopeo
Signed-off-by: Harshal Patil <harshal.patil@in.ibm.com> Signed-off-by: Brandon Lum <lumjjb@gmail.com>
This commit is contained in:
Harshal Patil
153
vendor/github.com/klauspost/compress/zstd/fse_predefined.go
generated
vendored
153
vendor/github.com/klauspost/compress/zstd/fse_predefined.go
generated
vendored
@@ -7,6 +7,7 @@ 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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@@ -69,85 +70,89 @@ func fillBase(dst []baseOffset, base uint32, bits ...uint8) {
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}
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}
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func init() {
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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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var predef sync.Once
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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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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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}
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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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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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// 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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// 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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// 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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// 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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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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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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// 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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// 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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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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