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37 lines
889 B
Go
37 lines
889 B
Go
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Package regexp implements a simple regular expression library.
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// QuoteMeta func is copied here to avoid linking the entire Regexp library.
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package rubex
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func special(c int) bool {
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for _, r := range `\.+*?()|[]^$` {
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if c == int(r) {
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return true
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}
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}
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return false
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}
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// QuoteMeta returns a string that quotes all regular expression metacharacters
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// inside the argument text; the returned string is a regular expression matching
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// the literal text. For example, QuoteMeta(`[foo]`) returns `\[foo\]`.
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func QuoteMeta(s string) string {
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b := make([]byte, 2*len(s))
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// A byte loop is correct because all metacharacters are ASCII.
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j := 0
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for i := 0; i < len(s); i++ {
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if special(int(s[i])) {
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b[j] = '\\'
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j++
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}
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b[j] = s[i]
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j++
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}
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return string(b[0:j])
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}
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