mirror of
https://github.com/cwinfo/matterbridge.git
synced 2025-07-04 12:27:44 +00:00
Update dependencies (#1851)
This commit is contained in:
Wim
260
vendor/github.com/klauspost/compress/zstd/seqdec.go
generated
vendored
260
vendor/github.com/klauspost/compress/zstd/seqdec.go
generated
vendored
@ -73,6 +73,7 @@ type sequenceDecs struct {
|
||||
seqSize int
|
||||
windowSize int
|
||||
maxBits uint8
|
||||
maxSyncLen uint64
|
||||
}
|
||||
|
||||
// initialize all 3 decoders from the stream input.
|
||||
@ -98,153 +99,13 @@ func (s *sequenceDecs) initialize(br *bitReader, hist *history, out []byte) erro
|
||||
return nil
|
||||
}
|
||||
|
||||
// decode sequences from the stream with the provided history.
|
||||
func (s *sequenceDecs) decode(seqs []seqVals) error {
|
||||
br := s.br
|
||||
|
||||
// Grab full sizes tables, to avoid bounds checks.
|
||||
llTable, mlTable, ofTable := s.litLengths.fse.dt[:maxTablesize], s.matchLengths.fse.dt[:maxTablesize], s.offsets.fse.dt[:maxTablesize]
|
||||
llState, mlState, ofState := s.litLengths.state.state, s.matchLengths.state.state, s.offsets.state.state
|
||||
s.seqSize = 0
|
||||
litRemain := len(s.literals)
|
||||
maxBlockSize := maxCompressedBlockSize
|
||||
if s.windowSize < maxBlockSize {
|
||||
maxBlockSize = s.windowSize
|
||||
}
|
||||
for i := range seqs {
|
||||
var ll, mo, ml int
|
||||
if br.off > 4+((maxOffsetBits+16+16)>>3) {
|
||||
// inlined function:
|
||||
// ll, mo, ml = s.nextFast(br, llState, mlState, ofState)
|
||||
|
||||
// Final will not read from stream.
|
||||
var llB, mlB, moB uint8
|
||||
ll, llB = llState.final()
|
||||
ml, mlB = mlState.final()
|
||||
mo, moB = ofState.final()
|
||||
|
||||
// extra bits are stored in reverse order.
|
||||
br.fillFast()
|
||||
mo += br.getBits(moB)
|
||||
if s.maxBits > 32 {
|
||||
br.fillFast()
|
||||
}
|
||||
ml += br.getBits(mlB)
|
||||
ll += br.getBits(llB)
|
||||
|
||||
if moB > 1 {
|
||||
s.prevOffset[2] = s.prevOffset[1]
|
||||
s.prevOffset[1] = s.prevOffset[0]
|
||||
s.prevOffset[0] = mo
|
||||
} else {
|
||||
// mo = s.adjustOffset(mo, ll, moB)
|
||||
// Inlined for rather big speedup
|
||||
if ll == 0 {
|
||||
// There is an exception though, when current sequence's literals_length = 0.
|
||||
// In this case, repeated offsets are shifted by one, so an offset_value of 1 means Repeated_Offset2,
|
||||
// an offset_value of 2 means Repeated_Offset3, and an offset_value of 3 means Repeated_Offset1 - 1_byte.
|
||||
mo++
|
||||
}
|
||||
|
||||
if mo == 0 {
|
||||
mo = s.prevOffset[0]
|
||||
} else {
|
||||
var temp int
|
||||
if mo == 3 {
|
||||
temp = s.prevOffset[0] - 1
|
||||
} else {
|
||||
temp = s.prevOffset[mo]
|
||||
}
|
||||
|
||||
if temp == 0 {
|
||||
// 0 is not valid; input is corrupted; force offset to 1
|
||||
println("WARNING: temp was 0")
|
||||
temp = 1
|
||||
}
|
||||
|
||||
if mo != 1 {
|
||||
s.prevOffset[2] = s.prevOffset[1]
|
||||
}
|
||||
s.prevOffset[1] = s.prevOffset[0]
|
||||
s.prevOffset[0] = temp
|
||||
mo = temp
|
||||
}
|
||||
}
|
||||
br.fillFast()
|
||||
} else {
|
||||
if br.overread() {
|
||||
if debugDecoder {
|
||||
printf("reading sequence %d, exceeded available data\n", i)
|
||||
}
|
||||
return io.ErrUnexpectedEOF
|
||||
}
|
||||
ll, mo, ml = s.next(br, llState, mlState, ofState)
|
||||
br.fill()
|
||||
}
|
||||
|
||||
if debugSequences {
|
||||
println("Seq", i, "Litlen:", ll, "mo:", mo, "(abs) ml:", ml)
|
||||
}
|
||||
// Evaluate.
|
||||
// We might be doing this async, so do it early.
|
||||
if mo == 0 && ml > 0 {
|
||||
return fmt.Errorf("zero matchoff and matchlen (%d) > 0", ml)
|
||||
}
|
||||
if ml > maxMatchLen {
|
||||
return fmt.Errorf("match len (%d) bigger than max allowed length", ml)
|
||||
}
|
||||
s.seqSize += ll + ml
|
||||
if s.seqSize > maxBlockSize {
|
||||
return fmt.Errorf("output (%d) bigger than max block size (%d)", s.seqSize, maxBlockSize)
|
||||
}
|
||||
litRemain -= ll
|
||||
if litRemain < 0 {
|
||||
return fmt.Errorf("unexpected literal count, want %d bytes, but only %d is available", ll, litRemain+ll)
|
||||
}
|
||||
seqs[i] = seqVals{
|
||||
ll: ll,
|
||||
ml: ml,
|
||||
mo: mo,
|
||||
}
|
||||
if i == len(seqs)-1 {
|
||||
// This is the last sequence, so we shouldn't update state.
|
||||
break
|
||||
}
|
||||
|
||||
// Manually inlined, ~ 5-20% faster
|
||||
// Update all 3 states at once. Approx 20% faster.
|
||||
nBits := llState.nbBits() + mlState.nbBits() + ofState.nbBits()
|
||||
if nBits == 0 {
|
||||
llState = llTable[llState.newState()&maxTableMask]
|
||||
mlState = mlTable[mlState.newState()&maxTableMask]
|
||||
ofState = ofTable[ofState.newState()&maxTableMask]
|
||||
} else {
|
||||
bits := br.get32BitsFast(nBits)
|
||||
lowBits := uint16(bits >> ((ofState.nbBits() + mlState.nbBits()) & 31))
|
||||
llState = llTable[(llState.newState()+lowBits)&maxTableMask]
|
||||
|
||||
lowBits = uint16(bits >> (ofState.nbBits() & 31))
|
||||
lowBits &= bitMask[mlState.nbBits()&15]
|
||||
mlState = mlTable[(mlState.newState()+lowBits)&maxTableMask]
|
||||
|
||||
lowBits = uint16(bits) & bitMask[ofState.nbBits()&15]
|
||||
ofState = ofTable[(ofState.newState()+lowBits)&maxTableMask]
|
||||
}
|
||||
}
|
||||
s.seqSize += litRemain
|
||||
if s.seqSize > maxBlockSize {
|
||||
return fmt.Errorf("output (%d) bigger than max block size (%d)", s.seqSize, maxBlockSize)
|
||||
}
|
||||
err := br.close()
|
||||
if err != nil {
|
||||
printf("Closing sequences: %v, %+v\n", err, *br)
|
||||
}
|
||||
return err
|
||||
}
|
||||
|
||||
// execute will execute the decoded sequence with the provided history.
|
||||
// The sequence must be evaluated before being sent.
|
||||
func (s *sequenceDecs) execute(seqs []seqVals, hist []byte) error {
|
||||
if len(s.dict) == 0 {
|
||||
return s.executeSimple(seqs, hist)
|
||||
}
|
||||
|
||||
// Ensure we have enough output size...
|
||||
if len(s.out)+s.seqSize > cap(s.out) {
|
||||
addBytes := s.seqSize + len(s.out)
|
||||
@ -327,6 +188,7 @@ func (s *sequenceDecs) execute(seqs []seqVals, hist []byte) error {
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Add final literals
|
||||
copy(out[t:], s.literals)
|
||||
if debugDecoder {
|
||||
@ -341,14 +203,18 @@ func (s *sequenceDecs) execute(seqs []seqVals, hist []byte) error {
|
||||
}
|
||||
|
||||
// decode sequences from the stream with the provided history.
|
||||
func (s *sequenceDecs) decodeSync(history *history) error {
|
||||
func (s *sequenceDecs) decodeSync(hist []byte) error {
|
||||
supported, err := s.decodeSyncSimple(hist)
|
||||
if supported {
|
||||
return err
|
||||
}
|
||||
|
||||
br := s.br
|
||||
seqs := s.nSeqs
|
||||
startSize := len(s.out)
|
||||
// Grab full sizes tables, to avoid bounds checks.
|
||||
llTable, mlTable, ofTable := s.litLengths.fse.dt[:maxTablesize], s.matchLengths.fse.dt[:maxTablesize], s.offsets.fse.dt[:maxTablesize]
|
||||
llState, mlState, ofState := s.litLengths.state.state, s.matchLengths.state.state, s.offsets.state.state
|
||||
hist := history.b[history.ignoreBuffer:]
|
||||
out := s.out
|
||||
maxBlockSize := maxCompressedBlockSize
|
||||
if s.windowSize < maxBlockSize {
|
||||
@ -433,7 +299,7 @@ func (s *sequenceDecs) decodeSync(history *history) error {
|
||||
}
|
||||
size := ll + ml + len(out)
|
||||
if size-startSize > maxBlockSize {
|
||||
return fmt.Errorf("output (%d) bigger than max block size (%d)", size, maxBlockSize)
|
||||
return fmt.Errorf("output (%d) bigger than max block size (%d)", size-startSize, maxBlockSize)
|
||||
}
|
||||
if size > cap(out) {
|
||||
// Not enough size, which can happen under high volume block streaming conditions
|
||||
@ -463,13 +329,13 @@ func (s *sequenceDecs) decodeSync(history *history) error {
|
||||
|
||||
if mo > len(out)+len(hist) || mo > s.windowSize {
|
||||
if len(s.dict) == 0 {
|
||||
return fmt.Errorf("match offset (%d) bigger than current history (%d)", mo, len(out)+len(hist))
|
||||
return fmt.Errorf("match offset (%d) bigger than current history (%d)", mo, len(out)+len(hist)-startSize)
|
||||
}
|
||||
|
||||
// we may be in dictionary.
|
||||
dictO := len(s.dict) - (mo - (len(out) + len(hist)))
|
||||
if dictO < 0 || dictO >= len(s.dict) {
|
||||
return fmt.Errorf("match offset (%d) bigger than current history (%d)", mo, len(out)+len(hist))
|
||||
return fmt.Errorf("match offset (%d) bigger than current history (%d)", mo, len(out)+len(hist)-startSize)
|
||||
}
|
||||
end := dictO + ml
|
||||
if end > len(s.dict) {
|
||||
@ -530,6 +396,7 @@ func (s *sequenceDecs) decodeSync(history *history) error {
|
||||
ofState = ofTable[ofState.newState()&maxTableMask]
|
||||
} else {
|
||||
bits := br.get32BitsFast(nBits)
|
||||
|
||||
lowBits := uint16(bits >> ((ofState.nbBits() + mlState.nbBits()) & 31))
|
||||
llState = llTable[(llState.newState()+lowBits)&maxTableMask]
|
||||
|
||||
@ -543,8 +410,8 @@ func (s *sequenceDecs) decodeSync(history *history) error {
|
||||
}
|
||||
|
||||
// Check if space for literals
|
||||
if len(s.literals)+len(s.out)-startSize > maxBlockSize {
|
||||
return fmt.Errorf("output (%d) bigger than max block size (%d)", len(s.out), maxBlockSize)
|
||||
if size := len(s.literals) + len(s.out) - startSize; size > maxBlockSize {
|
||||
return fmt.Errorf("output (%d) bigger than max block size (%d)", size, maxBlockSize)
|
||||
}
|
||||
|
||||
// Add final literals
|
||||
@ -552,16 +419,6 @@ func (s *sequenceDecs) decodeSync(history *history) error {
|
||||
return br.close()
|
||||
}
|
||||
|
||||
// update states, at least 27 bits must be available.
|
||||
func (s *sequenceDecs) update(br *bitReader) {
|
||||
// Max 8 bits
|
||||
s.litLengths.state.next(br)
|
||||
// Max 9 bits
|
||||
s.matchLengths.state.next(br)
|
||||
// Max 8 bits
|
||||
s.offsets.state.next(br)
|
||||
}
|
||||
|
||||
var bitMask [16]uint16
|
||||
|
||||
func init() {
|
||||
@ -570,87 +427,6 @@ func init() {
|
||||
}
|
||||
}
|
||||
|
||||
// update states, at least 27 bits must be available.
|
||||
func (s *sequenceDecs) updateAlt(br *bitReader) {
|
||||
// Update all 3 states at once. Approx 20% faster.
|
||||
a, b, c := s.litLengths.state.state, s.matchLengths.state.state, s.offsets.state.state
|
||||
|
||||
nBits := a.nbBits() + b.nbBits() + c.nbBits()
|
||||
if nBits == 0 {
|
||||
s.litLengths.state.state = s.litLengths.state.dt[a.newState()]
|
||||
s.matchLengths.state.state = s.matchLengths.state.dt[b.newState()]
|
||||
s.offsets.state.state = s.offsets.state.dt[c.newState()]
|
||||
return
|
||||
}
|
||||
bits := br.get32BitsFast(nBits)
|
||||
lowBits := uint16(bits >> ((c.nbBits() + b.nbBits()) & 31))
|
||||
s.litLengths.state.state = s.litLengths.state.dt[a.newState()+lowBits]
|
||||
|
||||
lowBits = uint16(bits >> (c.nbBits() & 31))
|
||||
lowBits &= bitMask[b.nbBits()&15]
|
||||
s.matchLengths.state.state = s.matchLengths.state.dt[b.newState()+lowBits]
|
||||
|
||||
lowBits = uint16(bits) & bitMask[c.nbBits()&15]
|
||||
s.offsets.state.state = s.offsets.state.dt[c.newState()+lowBits]
|
||||
}
|
||||
|
||||
// nextFast will return new states when there are at least 4 unused bytes left on the stream when done.
|
||||
func (s *sequenceDecs) nextFast(br *bitReader, llState, mlState, ofState decSymbol) (ll, mo, ml int) {
|
||||
// Final will not read from stream.
|
||||
ll, llB := llState.final()
|
||||
ml, mlB := mlState.final()
|
||||
mo, moB := ofState.final()
|
||||
|
||||
// extra bits are stored in reverse order.
|
||||
br.fillFast()
|
||||
mo += br.getBits(moB)
|
||||
if s.maxBits > 32 {
|
||||
br.fillFast()
|
||||
}
|
||||
ml += br.getBits(mlB)
|
||||
ll += br.getBits(llB)
|
||||
|
||||
if moB > 1 {
|
||||
s.prevOffset[2] = s.prevOffset[1]
|
||||
s.prevOffset[1] = s.prevOffset[0]
|
||||
s.prevOffset[0] = mo
|
||||
return
|
||||
}
|
||||
// mo = s.adjustOffset(mo, ll, moB)
|
||||
// Inlined for rather big speedup
|
||||
if ll == 0 {
|
||||
// There is an exception though, when current sequence's literals_length = 0.
|
||||
// In this case, repeated offsets are shifted by one, so an offset_value of 1 means Repeated_Offset2,
|
||||
// an offset_value of 2 means Repeated_Offset3, and an offset_value of 3 means Repeated_Offset1 - 1_byte.
|
||||
mo++
|
||||
}
|
||||
|
||||
if mo == 0 {
|
||||
mo = s.prevOffset[0]
|
||||
return
|
||||
}
|
||||
var temp int
|
||||
if mo == 3 {
|
||||
temp = s.prevOffset[0] - 1
|
||||
} else {
|
||||
temp = s.prevOffset[mo]
|
||||
}
|
||||
|
||||
if temp == 0 {
|
||||
// 0 is not valid; input is corrupted; force offset to 1
|
||||
println("temp was 0")
|
||||
temp = 1
|
||||
}
|
||||
|
||||
if mo != 1 {
|
||||
s.prevOffset[2] = s.prevOffset[1]
|
||||
}
|
||||
s.prevOffset[1] = s.prevOffset[0]
|
||||
s.prevOffset[0] = temp
|
||||
mo = temp
|
||||
return
|
||||
}
|
||||
|
||||
func (s *sequenceDecs) next(br *bitReader, llState, mlState, ofState decSymbol) (ll, mo, ml int) {
|
||||
// Final will not read from stream.
|
||||
ll, llB := llState.final()
|
||||
|
||||
Reference in New Issue
Block a user