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feat(search): support code search by zoekt #33850
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,49 @@ | ||
| // Copyright 2025 The Gitea Authors. All rights reserved. | ||
| // SPDX-License-Identifier: MIT | ||
|
|
||
| package zoekt | ||
|
|
||
| import "unicode/utf8" | ||
|
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||
| // Bitmap used by func special to check whether a character needs to be escaped. | ||
| var specialBytes [16]byte | ||
|
|
||
| // special reports whether byte b needs to be escaped by QuoteMeta. | ||
| func special(b byte) bool { | ||
| return b < utf8.RuneSelf && specialBytes[b%16]&(1<<(b/16)) != 0 | ||
| } | ||
|
|
||
| func init() { | ||
| for _, b := range []byte(`-:\.+*?()|[]{}^$`) { | ||
| specialBytes[b%16] |= 1 << (b / 16) | ||
| } | ||
| } | ||
|
|
||
| func QuoteMeta(s string) string { | ||
| // A byte loop is correct because all metacharacters are ASCII. | ||
| var i int | ||
| for i = 0; i < len(s); i++ { | ||
| if special(s[i]) { | ||
| break | ||
| } | ||
| } | ||
| // No meta characters found, so return original string. | ||
| if i >= len(s) { | ||
| return s | ||
| } | ||
|
|
||
| b := make([]byte, 3*len(s)-2*i) | ||
| copy(b, s[:i]) | ||
| j := i | ||
| for ; i < len(s); i++ { | ||
| if special(s[i]) { | ||
| b[j] = '\\' | ||
| j++ | ||
| b[j] = '\\' | ||
| j++ | ||
| } | ||
| b[j] = s[i] | ||
| j++ | ||
| } | ||
| return string(b[:j]) | ||
| } |
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Should we still need this comment?
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Yes, this check can help ensure the correctness of the index data, but it's not necessary at the moment—it can be added in the future.