docker/buildx
1
0
Fork 0
mirror of https://gitea.com/Lydanne/buildx.git synced 2025-07-09 21:17:09 +08:00
Code Issues Packages Projects Releases 1 Wiki Activity

vendor: github.com/klauspost/compress v1.17.9

Browse Source 
full diff: https://github.com/klauspost/compress/compare/v1.17.4...v1.17.9

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Sebastiaan van Stijn
2024-06-25 22:57:14 +02:00
parent 4c3af9becf
commit a3c8a72b54
20 changed files with 256 additions and 138 deletions
Download Patch File Download Diff File Expand all files Collapse all files

49
vendor/github.com/klauspost/compress/zstd/enc_best.go generated vendored
View File

@ -135,8 +135,20 @@ func (e *bestFastEncoder) Encode(blk *blockEnc, src []byte) {
break
}
// Add block to history
s := e.addBlock(src)
blk.size = len(src)
// Check RLE first
if len(src) > zstdMinMatch {
ml := matchLen(src[1:], src)
if ml == len(src)-1 {
blk.literals = append(blk.literals, src[0])
blk.sequences = append(blk.sequences, seq{litLen: 1, matchLen: uint32(len(src)-1) - zstdMinMatch, offset: 1 + 3})
return
}
}
if len(src) < minNonLiteralBlockSize {
blk.extraLits = len(src)
blk.literals = blk.literals[:len(src)]
@ -201,14 +213,6 @@ encodeLoop:
if delta >= e.maxMatchOff || delta <= 0 || load3232(src, offset) != first {
return
}
if debugAsserts {
if offset >= s {
panic(fmt.Sprintf("offset: %d - s:%d - rep: %d - cur :%d - max: %d", offset, s, rep, e.cur, e.maxMatchOff))
}
if !bytes.Equal(src[s:s+4], src[offset:offset+4]) {
panic(fmt.Sprintf("first match mismatch: %v != %v, first: %08x", src[s:s+4], src[offset:offset+4], first))
}
}
// Try to quick reject if we already have a long match.
if m.length > 16 {
left := len(src) - int(m.s+m.length)
@ -227,8 +231,10 @@ encodeLoop:
}
}
l := 4 + e.matchlen(s+4, offset+4, src)
if true {
if m.rep <= 0 {
// Extend candidate match backwards as far as possible.
// Do not extend repeats as we can assume they are optimal
// and offsets change if s == nextEmit.
tMin := s - e.maxMatchOff
if tMin < 0 {
tMin = 0
@ -239,7 +245,14 @@ encodeLoop:
l++
}
}
if debugAsserts {
if offset >= s {
panic(fmt.Sprintf("offset: %d - s:%d - rep: %d - cur :%d - max: %d", offset, s, rep, e.cur, e.maxMatchOff))
}
if !bytes.Equal(src[s:s+l], src[offset:offset+l]) {
panic(fmt.Sprintf("second match mismatch: %v != %v, first: %08x", src[s:s+4], src[offset:offset+4], first))
}
}
cand := match{offset: offset, s: s, length: l, rep: rep}
cand.estBits(bitsPerByte)
if m.est >= highScore || cand.est-m.est+(cand.s-m.s)*bitsPerByte>>10 < 0 {
@ -336,24 +349,31 @@ encodeLoop:
}
if debugAsserts {
if best.offset >= best.s {
panic(fmt.Sprintf("best.offset > s: %d >= %d", best.offset, best.s))
}
if best.s < nextEmit {
panic(fmt.Sprintf("s %d < nextEmit %d", best.s, nextEmit))
}
if best.offset < s-e.maxMatchOff {
panic(fmt.Sprintf("best.offset < s-e.maxMatchOff: %d < %d", best.offset, s-e.maxMatchOff))
}
if !bytes.Equal(src[best.s:best.s+best.length], src[best.offset:best.offset+best.length]) {
panic(fmt.Sprintf("match mismatch: %v != %v", src[best.s:best.s+best.length], src[best.offset:best.offset+best.length]))
}
}
// We have a match, we can store the forward value
s = best.s
if best.rep > 0 {
var seq seq
seq.matchLen = uint32(best.length - zstdMinMatch)
if debugAsserts && s < nextEmit {
panic("s < nextEmit")
}
addLiterals(&seq, best.s)
// Repeat. If bit 4 is set, this is a non-lit repeat.
seq.offset = uint32(best.rep & 3)
if debugSequences {
println("repeat sequence", seq, "next s:", s)
println("repeat sequence", seq, "next s:", best.s, "off:", best.s-best.offset)
}
blk.sequences = append(blk.sequences, seq)
@ -396,7 +416,6 @@ encodeLoop:
// A 4-byte match has been found. Update recent offsets.
// We'll later see if more than 4 bytes.
s = best.s
t := best.offset
offset1, offset2, offset3 = s-t, offset1, offset2