mirror of
https://github.com/go-gitea/gitea.git
synced 2024-12-04 14:46:57 -05:00
12a1f914f4
* update github.com/alecthomas/chroma v0.8.0 -> v0.8.1 * github.com/blevesearch/bleve v1.0.10 -> v1.0.12 * editorconfig-core-go v2.1.1 -> v2.3.7 * github.com/gliderlabs/ssh v0.2.2 -> v0.3.1 * migrate editorconfig.ParseBytes to Parse * github.com/shurcooL/vfsgen to 0d455de96546 * github.com/go-git/go-git/v5 v5.1.0 -> v5.2.0 * github.com/google/uuid v1.1.1 -> v1.1.2 * github.com/huandu/xstrings v1.3.0 -> v1.3.2 * github.com/klauspost/compress v1.10.11 -> v1.11.1 * github.com/markbates/goth v1.61.2 -> v1.65.0 * github.com/mattn/go-sqlite3 v1.14.0 -> v1.14.4 * github.com/mholt/archiver v3.3.0 -> v3.3.2 * github.com/microcosm-cc/bluemonday 4f7140c49acb -> v1.0.4 * github.com/minio/minio-go v7.0.4 -> v7.0.5 * github.com/olivere/elastic v7.0.9 -> v7.0.20 * github.com/urfave/cli v1.20.0 -> v1.22.4 * github.com/prometheus/client_golang v1.1.0 -> v1.8.0 * github.com/xanzy/go-gitlab v0.37.0 -> v0.38.1 * mvdan.cc/xurls v2.1.0 -> v2.2.0 Co-authored-by: Lauris BH <lauris@nix.lv>
54 lines
1.5 KiB
Go
Vendored
54 lines
1.5 KiB
Go
Vendored
// Copyright 2014-2019 Ulrich Kunitz. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package lzma
|
|
|
|
// movebits defines the number of bits used for the updates of probability
|
|
// values.
|
|
const movebits = 5
|
|
|
|
// probbits defines the number of bits of a probability value.
|
|
const probbits = 11
|
|
|
|
// probInit defines 0.5 as initial value for prob values.
|
|
const probInit prob = 1 << (probbits - 1)
|
|
|
|
// Type prob represents probabilities. The type can also be used to encode and
|
|
// decode single bits.
|
|
type prob uint16
|
|
|
|
// Dec decreases the probability. The decrease is proportional to the
|
|
// probability value.
|
|
func (p *prob) dec() {
|
|
*p -= *p >> movebits
|
|
}
|
|
|
|
// Inc increases the probability. The Increase is proportional to the
|
|
// difference of 1 and the probability value.
|
|
func (p *prob) inc() {
|
|
*p += ((1 << probbits) - *p) >> movebits
|
|
}
|
|
|
|
// Computes the new bound for a given range using the probability value.
|
|
func (p prob) bound(r uint32) uint32 {
|
|
return (r >> probbits) * uint32(p)
|
|
}
|
|
|
|
// Bits returns 1. One is the number of bits that can be encoded or decoded
|
|
// with a single prob value.
|
|
func (p prob) Bits() int {
|
|
return 1
|
|
}
|
|
|
|
// Encode encodes the least-significant bit of v. Note that the p value will be
|
|
// changed.
|
|
func (p *prob) Encode(e *rangeEncoder, v uint32) error {
|
|
return e.EncodeBit(v, p)
|
|
}
|
|
|
|
// Decode decodes a single bit. Note that the p value will change.
|
|
func (p *prob) Decode(d *rangeDecoder) (v uint32, err error) {
|
|
return d.DecodeBit(p)
|
|
}
|