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mirror of https://github.com/go-gitea/gitea.git synced 2024-12-04 14:46:57 -05:00
gitea/vendor/github.com/andybalholm/brotli/find_match_length.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

46 lines
1.1 KiB
Go
Vendored

package brotli
import (
"encoding/binary"
"math/bits"
"runtime"
)
/* Copyright 2010 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Function to find maximal matching prefixes of strings. */
func findMatchLengthWithLimit(s1 []byte, s2 []byte, limit uint) uint {
var matched uint = 0
_, _ = s1[limit-1], s2[limit-1] // bounds check
switch runtime.GOARCH {
case "amd64":
// Compare 8 bytes at at time.
for matched+8 <= limit {
w1 := binary.LittleEndian.Uint64(s1[matched:])
w2 := binary.LittleEndian.Uint64(s2[matched:])
if w1 != w2 {
return matched + uint(bits.TrailingZeros64(w1^w2)>>3)
}
matched += 8
}
case "386":
// Compare 4 bytes at at time.
for matched+4 <= limit {
w1 := binary.LittleEndian.Uint32(s1[matched:])
w2 := binary.LittleEndian.Uint32(s2[matched:])
if w1 != w2 {
return matched + uint(bits.TrailingZeros32(w1^w2)>>3)
}
matched += 4
}
}
for matched < limit && s1[matched] == s2[matched] {
matched++
}
return matched
}