d77176912b
* Migrate to go modules * make vendor * Update mvdan.cc/xurls * make vendor * Update code.gitea.io/git * make fmt-check * Update github.com/go-sql-driver/mysql * make vendor
88 lines
2.4 KiB
Go
88 lines
2.4 KiB
Go
// Copyright (c) 2012-2016 The go-diff authors. All rights reserved.
|
|
// https://github.com/sergi/go-diff
|
|
// See the included LICENSE file for license details.
|
|
//
|
|
// go-diff is a Go implementation of Google's Diff, Match, and Patch library
|
|
// Original library is Copyright (c) 2006 Google Inc.
|
|
// http://code.google.com/p/google-diff-match-patch/
|
|
|
|
package diffmatchpatch
|
|
|
|
import (
|
|
"strings"
|
|
"unicode/utf8"
|
|
)
|
|
|
|
// unescaper unescapes selected chars for compatibility with JavaScript's encodeURI.
|
|
// In speed critical applications this could be dropped since the receiving application will certainly decode these fine. Note that this function is case-sensitive. Thus "%3F" would not be unescaped. But this is ok because it is only called with the output of HttpUtility.UrlEncode which returns lowercase hex. Example: "%3f" -> "?", "%24" -> "$", etc.
|
|
var unescaper = strings.NewReplacer(
|
|
"%21", "!", "%7E", "~", "%27", "'",
|
|
"%28", "(", "%29", ")", "%3B", ";",
|
|
"%2F", "/", "%3F", "?", "%3A", ":",
|
|
"%40", "@", "%26", "&", "%3D", "=",
|
|
"%2B", "+", "%24", "$", "%2C", ",", "%23", "#", "%2A", "*")
|
|
|
|
// indexOf returns the first index of pattern in str, starting at str[i].
|
|
func indexOf(str string, pattern string, i int) int {
|
|
if i > len(str)-1 {
|
|
return -1
|
|
}
|
|
if i <= 0 {
|
|
return strings.Index(str, pattern)
|
|
}
|
|
ind := strings.Index(str[i:], pattern)
|
|
if ind == -1 {
|
|
return -1
|
|
}
|
|
return ind + i
|
|
}
|
|
|
|
// lastIndexOf returns the last index of pattern in str, starting at str[i].
|
|
func lastIndexOf(str string, pattern string, i int) int {
|
|
if i < 0 {
|
|
return -1
|
|
}
|
|
if i >= len(str) {
|
|
return strings.LastIndex(str, pattern)
|
|
}
|
|
_, size := utf8.DecodeRuneInString(str[i:])
|
|
return strings.LastIndex(str[:i+size], pattern)
|
|
}
|
|
|
|
// runesIndexOf returns the index of pattern in target, starting at target[i].
|
|
func runesIndexOf(target, pattern []rune, i int) int {
|
|
if i > len(target)-1 {
|
|
return -1
|
|
}
|
|
if i <= 0 {
|
|
return runesIndex(target, pattern)
|
|
}
|
|
ind := runesIndex(target[i:], pattern)
|
|
if ind == -1 {
|
|
return -1
|
|
}
|
|
return ind + i
|
|
}
|
|
|
|
func runesEqual(r1, r2 []rune) bool {
|
|
if len(r1) != len(r2) {
|
|
return false
|
|
}
|
|
for i, c := range r1 {
|
|
if c != r2[i] {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
// runesIndex is the equivalent of strings.Index for rune slices.
|
|
func runesIndex(r1, r2 []rune) int {
|
|
last := len(r1) - len(r2)
|
|
for i := 0; i <= last; i++ {
|
|
if runesEqual(r1[i:i+len(r2)], r2) {
|
|
return i
|
|
}
|
|
}
|
|
return -1
|
|
}
|