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gitea/vendor/github.com/ulikunitz/xz/lzma/directcodec.go
6543 12a1f914f4
Vendor Update Go Libs (#13166)
* 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>
2020-10-16 01:06:27 -04:00

50 lines
1.4 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
import "fmt"
// directCodec allows the encoding and decoding of values with a fixed number
// of bits. The number of bits must be in the range [1,32].
type directCodec byte
// makeDirectCodec creates a directCodec. The function panics if the number of
// bits is not in the range [1,32].
func makeDirectCodec(bits int) directCodec {
if !(1 <= bits && bits <= 32) {
panic(fmt.Errorf("bits=%d out of range", bits))
}
return directCodec(bits)
}
// Bits returns the number of bits supported by this codec.
func (dc directCodec) Bits() int {
return int(dc)
}
// Encode uses the range encoder to encode a value with the fixed number of
// bits. The most-significant bit is encoded first.
func (dc directCodec) Encode(e *rangeEncoder, v uint32) error {
for i := int(dc) - 1; i >= 0; i-- {
if err := e.DirectEncodeBit(v >> uint(i)); err != nil {
return err
}
}
return nil
}
// Decode uses the range decoder to decode a value with the given number of
// given bits. The most-significant bit is decoded first.
func (dc directCodec) Decode(d *rangeDecoder) (v uint32, err error) {
for i := int(dc) - 1; i >= 0; i-- {
x, err := d.DirectDecodeBit()
if err != nil {
return 0, err
}
v = (v << 1) | x
}
return v, nil
}