mirror of
https://github.com/containers/podman.git
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Update containers/storage to v1.16.5
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
This commit is contained in:
Daniel J Walsh
140
vendor/github.com/klauspost/compress/zstd/enc_fast.go
generated
vendored
140
vendor/github.com/klauspost/compress/zstd/enc_fast.go
generated
vendored
@ -6,6 +6,7 @@ package zstd
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import (
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"fmt"
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"math"
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"math/bits"
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"github.com/klauspost/compress/zstd/internal/xxhash"
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@ -23,7 +24,7 @@ type tableEntry struct {
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offset int32
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}
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type fastEncoder struct {
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type fastBase struct {
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o encParams
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// cur is the offset at the start of hist
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cur int32
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@ -31,18 +32,22 @@ type fastEncoder struct {
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maxMatchOff int32
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hist []byte
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crc *xxhash.Digest
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table [tableSize]tableEntry
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tmp [8]byte
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blk *blockEnc
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}
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type fastEncoder struct {
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fastBase
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table [tableSize]tableEntry
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}
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// CRC returns the underlying CRC writer.
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func (e *fastEncoder) CRC() *xxhash.Digest {
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func (e *fastBase) CRC() *xxhash.Digest {
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return e.crc
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}
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// AppendCRC will append the CRC to the destination slice and return it.
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func (e *fastEncoder) AppendCRC(dst []byte) []byte {
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func (e *fastBase) AppendCRC(dst []byte) []byte {
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crc := e.crc.Sum(e.tmp[:0])
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dst = append(dst, crc[7], crc[6], crc[5], crc[4])
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return dst
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@ -50,7 +55,7 @@ func (e *fastEncoder) AppendCRC(dst []byte) []byte {
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// WindowSize returns the window size of the encoder,
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// or a window size small enough to contain the input size, if > 0.
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func (e *fastEncoder) WindowSize(size int) int32 {
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func (e *fastBase) WindowSize(size int) int32 {
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if size > 0 && size < int(e.maxMatchOff) {
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b := int32(1) << uint(bits.Len(uint(size)))
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// Keep minimum window.
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@ -63,7 +68,7 @@ func (e *fastEncoder) WindowSize(size int) int32 {
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}
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// Block returns the current block.
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func (e *fastEncoder) Block() *blockEnc {
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func (e *fastBase) Block() *blockEnc {
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return e.blk
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}
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@ -169,9 +174,22 @@ encodeLoop:
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if canRepeat && repIndex >= 0 && load3232(src, repIndex) == uint32(cv>>16) {
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// Consider history as well.
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var seq seq
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lenght := 4 + e.matchlen(s+6, repIndex+4, src)
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var length int32
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// length = 4 + e.matchlen(s+6, repIndex+4, src)
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{
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a := src[s+6:]
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b := src[repIndex+4:]
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endI := len(a) & (math.MaxInt32 - 7)
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length = int32(endI) + 4
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for i := 0; i < endI; i += 8 {
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if diff := load64(a, i) ^ load64(b, i); diff != 0 {
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length = int32(i+bits.TrailingZeros64(diff)>>3) + 4
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break
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}
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}
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}
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seq.matchLen = uint32(lenght - zstdMinMatch)
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seq.matchLen = uint32(length - zstdMinMatch)
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// We might be able to match backwards.
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// Extend as long as we can.
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@ -197,11 +215,11 @@ encodeLoop:
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println("repeat sequence", seq, "next s:", s)
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}
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blk.sequences = append(blk.sequences, seq)
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s += lenght + 2
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s += length + 2
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nextEmit = s
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if s >= sLimit {
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if debug {
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println("repeat ended", s, lenght)
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println("repeat ended", s, length)
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}
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break encodeLoop
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@ -257,7 +275,20 @@ encodeLoop:
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}
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// Extend the 4-byte match as long as possible.
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l := e.matchlen(s+4, t+4, src) + 4
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//l := e.matchlen(s+4, t+4, src) + 4
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var l int32
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{
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a := src[s+4:]
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b := src[t+4:]
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endI := len(a) & (math.MaxInt32 - 7)
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l = int32(endI) + 4
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for i := 0; i < endI; i += 8 {
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if diff := load64(a, i) ^ load64(b, i); diff != 0 {
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l = int32(i+bits.TrailingZeros64(diff)>>3) + 4
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break
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}
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}
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}
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// Extend backwards
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tMin := s - e.maxMatchOff
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@ -294,7 +325,20 @@ encodeLoop:
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if o2 := s - offset2; canRepeat && load3232(src, o2) == uint32(cv) {
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// We have at least 4 byte match.
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// No need to check backwards. We come straight from a match
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l := 4 + e.matchlen(s+4, o2+4, src)
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//l := 4 + e.matchlen(s+4, o2+4, src)
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var l int32
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{
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a := src[s+4:]
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b := src[o2+4:]
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endI := len(a) & (math.MaxInt32 - 7)
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l = int32(endI) + 4
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for i := 0; i < endI; i += 8 {
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if diff := load64(a, i) ^ load64(b, i); diff != 0 {
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l = int32(i+bits.TrailingZeros64(diff)>>3) + 4
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break
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}
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}
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}
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// Store this, since we have it.
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nextHash := hash6(cv, hashLog)
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@ -412,10 +456,23 @@ encodeLoop:
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if len(blk.sequences) > 2 && load3232(src, repIndex) == uint32(cv>>16) {
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// Consider history as well.
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var seq seq
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// lenght := 4 + e.matchlen(s+6, repIndex+4, src)
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lenght := 4 + int32(matchLen(src[s+6:], src[repIndex+4:]))
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// length := 4 + e.matchlen(s+6, repIndex+4, src)
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// length := 4 + int32(matchLen(src[s+6:], src[repIndex+4:]))
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var length int32
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{
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a := src[s+6:]
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b := src[repIndex+4:]
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endI := len(a) & (math.MaxInt32 - 7)
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length = int32(endI) + 4
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for i := 0; i < endI; i += 8 {
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if diff := load64(a, i) ^ load64(b, i); diff != 0 {
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length = int32(i+bits.TrailingZeros64(diff)>>3) + 4
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break
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}
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}
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}
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seq.matchLen = uint32(lenght - zstdMinMatch)
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seq.matchLen = uint32(length - zstdMinMatch)
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// We might be able to match backwards.
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// Extend as long as we can.
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@ -441,11 +498,11 @@ encodeLoop:
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println("repeat sequence", seq, "next s:", s)
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}
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blk.sequences = append(blk.sequences, seq)
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s += lenght + 2
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s += length + 2
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nextEmit = s
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if s >= sLimit {
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if debug {
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println("repeat ended", s, lenght)
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println("repeat ended", s, length)
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}
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break encodeLoop
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@ -498,7 +555,20 @@ encodeLoop:
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// Extend the 4-byte match as long as possible.
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//l := e.matchlenNoHist(s+4, t+4, src) + 4
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l := int32(matchLen(src[s+4:], src[t+4:])) + 4
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// l := int32(matchLen(src[s+4:], src[t+4:])) + 4
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var l int32
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{
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a := src[s+4:]
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b := src[t+4:]
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endI := len(a) & (math.MaxInt32 - 7)
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l = int32(endI) + 4
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for i := 0; i < endI; i += 8 {
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if diff := load64(a, i) ^ load64(b, i); diff != 0 {
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l = int32(i+bits.TrailingZeros64(diff)>>3) + 4
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break
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}
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}
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}
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// Extend backwards
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tMin := s - e.maxMatchOff
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@ -536,7 +606,20 @@ encodeLoop:
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// We have at least 4 byte match.
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// No need to check backwards. We come straight from a match
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//l := 4 + e.matchlenNoHist(s+4, o2+4, src)
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l := 4 + int32(matchLen(src[s+4:], src[o2+4:]))
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// l := 4 + int32(matchLen(src[s+4:], src[o2+4:]))
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var l int32
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{
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a := src[s+4:]
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b := src[o2+4:]
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endI := len(a) & (math.MaxInt32 - 7)
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l = int32(endI) + 4
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for i := 0; i < endI; i += 8 {
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if diff := load64(a, i) ^ load64(b, i); diff != 0 {
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l = int32(i+bits.TrailingZeros64(diff)>>3) + 4
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break
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}
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}
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}
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// Store this, since we have it.
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nextHash := hash6(cv, hashLog)
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@ -571,7 +654,7 @@ encodeLoop:
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}
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}
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func (e *fastEncoder) addBlock(src []byte) int32 {
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func (e *fastBase) addBlock(src []byte) int32 {
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if debugAsserts && e.cur > bufferReset {
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panic(fmt.Sprintf("ecur (%d) > buffer reset (%d)", e.cur, bufferReset))
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}
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@ -602,17 +685,17 @@ func (e *fastEncoder) addBlock(src []byte) int32 {
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// useBlock will replace the block with the provided one,
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// but transfer recent offsets from the previous.
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func (e *fastEncoder) UseBlock(enc *blockEnc) {
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func (e *fastBase) UseBlock(enc *blockEnc) {
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enc.reset(e.blk)
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e.blk = enc
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}
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func (e *fastEncoder) matchlenNoHist(s, t int32, src []byte) int32 {
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func (e *fastBase) matchlenNoHist(s, t int32, src []byte) int32 {
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// Extend the match to be as long as possible.
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return int32(matchLen(src[s:], src[t:]))
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}
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func (e *fastEncoder) matchlen(s, t int32, src []byte) int32 {
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func (e *fastBase) matchlen(s, t int32, src []byte) int32 {
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if debugAsserts {
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if s < 0 {
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err := fmt.Sprintf("s (%d) < 0", s)
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@ -626,18 +709,17 @@ func (e *fastEncoder) matchlen(s, t int32, src []byte) int32 {
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err := fmt.Sprintf("s (%d) - t (%d) > maxMatchOff (%d)", s, t, e.maxMatchOff)
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panic(err)
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}
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}
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s1 := int(s) + maxMatchLength - 4
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if s1 > len(src) {
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s1 = len(src)
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if len(src)-int(s) > maxCompressedBlockSize {
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panic(fmt.Sprintf("len(src)-s (%d) > maxCompressedBlockSize (%d)", len(src)-int(s), maxCompressedBlockSize))
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}
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}
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// Extend the match to be as long as possible.
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return int32(matchLen(src[s:s1], src[t:]))
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return int32(matchLen(src[s:], src[t:]))
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}
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// Reset the encoding table.
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func (e *fastEncoder) Reset() {
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func (e *fastBase) Reset() {
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if e.blk == nil {
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e.blk = &blockEnc{}
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e.blk.init()
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