mirror of
https://github.com/cwinfo/matterbridge.git
synced 2024-11-25 16:51:35 +00:00
5a1fd7dadd
Bumps [github.com/SevereCloud/vksdk/v2](https://github.com/SevereCloud/vksdk) from 2.11.0 to 2.13.0. - [Release notes](https://github.com/SevereCloud/vksdk/releases) - [Commits](https://github.com/SevereCloud/vksdk/compare/v2.11.0...v2.13.0) --- updated-dependencies: - dependency-name: github.com/SevereCloud/vksdk/v2 dependency-type: direct:production update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
115 lines
3.2 KiB
Go
115 lines
3.2 KiB
Go
// Copyright 2019+ Klaus Post. All rights reserved.
|
|
// License information can be found in the LICENSE file.
|
|
// Based on work by Yann Collet, released under BSD License.
|
|
|
|
package zstd
|
|
|
|
import "math/bits"
|
|
|
|
type seqCoders struct {
|
|
llEnc, ofEnc, mlEnc *fseEncoder
|
|
llPrev, ofPrev, mlPrev *fseEncoder
|
|
}
|
|
|
|
// swap coders with another (block).
|
|
func (s *seqCoders) swap(other *seqCoders) {
|
|
*s, *other = *other, *s
|
|
}
|
|
|
|
// setPrev will update the previous encoders to the actually used ones
|
|
// and make sure a fresh one is in the main slot.
|
|
func (s *seqCoders) setPrev(ll, ml, of *fseEncoder) {
|
|
compareSwap := func(used *fseEncoder, current, prev **fseEncoder) {
|
|
// We used the new one, more current to history and reuse the previous history
|
|
if *current == used {
|
|
*prev, *current = *current, *prev
|
|
c := *current
|
|
p := *prev
|
|
c.reUsed = false
|
|
p.reUsed = true
|
|
return
|
|
}
|
|
if used == *prev {
|
|
return
|
|
}
|
|
// Ensure we cannot reuse by accident
|
|
prevEnc := *prev
|
|
prevEnc.symbolLen = 0
|
|
}
|
|
compareSwap(ll, &s.llEnc, &s.llPrev)
|
|
compareSwap(ml, &s.mlEnc, &s.mlPrev)
|
|
compareSwap(of, &s.ofEnc, &s.ofPrev)
|
|
}
|
|
|
|
func highBit(val uint32) (n uint32) {
|
|
return uint32(bits.Len32(val) - 1)
|
|
}
|
|
|
|
var llCodeTable = [64]byte{0, 1, 2, 3, 4, 5, 6, 7,
|
|
8, 9, 10, 11, 12, 13, 14, 15,
|
|
16, 16, 17, 17, 18, 18, 19, 19,
|
|
20, 20, 20, 20, 21, 21, 21, 21,
|
|
22, 22, 22, 22, 22, 22, 22, 22,
|
|
23, 23, 23, 23, 23, 23, 23, 23,
|
|
24, 24, 24, 24, 24, 24, 24, 24,
|
|
24, 24, 24, 24, 24, 24, 24, 24}
|
|
|
|
// Up to 6 bits
|
|
const maxLLCode = 35
|
|
|
|
// llBitsTable translates from ll code to number of bits.
|
|
var llBitsTable = [maxLLCode + 1]byte{
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
|
1, 1, 1, 1, 2, 2, 3, 3,
|
|
4, 6, 7, 8, 9, 10, 11, 12,
|
|
13, 14, 15, 16}
|
|
|
|
// llCode returns the code that represents the literal length requested.
|
|
func llCode(litLength uint32) uint8 {
|
|
const llDeltaCode = 19
|
|
if litLength <= 63 {
|
|
// Compiler insists on bounds check (Go 1.12)
|
|
return llCodeTable[litLength&63]
|
|
}
|
|
return uint8(highBit(litLength)) + llDeltaCode
|
|
}
|
|
|
|
var mlCodeTable = [128]byte{0, 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, 31,
|
|
32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 36, 36, 37, 37, 37, 37,
|
|
38, 38, 38, 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, 39, 39, 39,
|
|
40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40,
|
|
41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41,
|
|
42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42,
|
|
42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42}
|
|
|
|
// Up to 6 bits
|
|
const maxMLCode = 52
|
|
|
|
// mlBitsTable translates from ml code to number of bits.
|
|
var mlBitsTable = [maxMLCode + 1]byte{
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
|
1, 1, 1, 1, 2, 2, 3, 3,
|
|
4, 4, 5, 7, 8, 9, 10, 11,
|
|
12, 13, 14, 15, 16}
|
|
|
|
// note : mlBase = matchLength - MINMATCH;
|
|
// because it's the format it's stored in seqStore->sequences
|
|
func mlCode(mlBase uint32) uint8 {
|
|
const mlDeltaCode = 36
|
|
if mlBase <= 127 {
|
|
// Compiler insists on bounds check (Go 1.12)
|
|
return mlCodeTable[mlBase&127]
|
|
}
|
|
return uint8(highBit(mlBase)) + mlDeltaCode
|
|
}
|
|
|
|
func ofCode(offset uint32) uint8 {
|
|
// A valid offset will always be > 0.
|
|
return uint8(bits.Len32(offset) - 1)
|
|
}
|