projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| dff8da6b | 1 | /* Copyright (C) 1996-2024 Free Software Foundation, Inc. |
| 33a934a3 | 2 | This file is part of the GNU C Library. |
| 30de3b18 | 3 | |
| 33a934a3 | 4 | The GNU C Library is free software; you can redistribute it and/or |
| 41bdb6e2 AJ |
5 | modify it under the terms of the GNU Lesser General Public |
| 6 | License as published by the Free Software Foundation; either | |
| 7 | version 2.1 of the License, or (at your option) any later version. | |
| 30de3b18 | 8 | |
| 33a934a3 UD |
9 | The GNU C Library is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 41bdb6e2 | 12 | Lesser General Public License for more details. |
| 30de3b18 | 13 | |
| 41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
| 59ba27a6 | 15 | License along with the GNU C Library; if not, see |
| 5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
| 30de3b18 RM |
17 | |
| 18 | #include <wchar.h> | |
| 19 | ||
| 88eefd34 SL |
20 | #ifdef WMEMCHR |
| 21 | # define __wmemchr WMEMCHR | |
| 22 | #endif | |
| 23 | ||
| 30de3b18 | 24 | wchar_t * |
| 9d46370c | 25 | __wmemchr (const wchar_t *s, wchar_t c, size_t n) |
| 30de3b18 RM |
26 | { |
| 27 | /* For performance reasons unfold the loop four times. */ | |
| 28 | while (n >= 4) | |
| 29 | { | |
| 30 | if (s[0] == c) | |
| 31 | return (wchar_t *) s; | |
| 32 | if (s[1] == c) | |
| 33 | return (wchar_t *) &s[1]; | |
| 34 | if (s[2] == c) | |
| 35 | return (wchar_t *) &s[2]; | |
| 36 | if (s[3] == c) | |
| 37 | return (wchar_t *) &s[3]; | |
| 38 | s += 4; | |
| 39 | n -= 4; | |
| 40 | } | |
| 41 | ||
| 42 | if (n > 0) | |
| 43 | { | |
| 44 | if (*s == c) | |
| 45 | return (wchar_t *) s; | |
| 46 | ++s; | |
| 47 | --n; | |
| 48 | } | |
| 49 | if (n > 0) | |
| 50 | { | |
| 51 | if (*s == c) | |
| 52 | return (wchar_t *) s; | |
| 53 | ++s; | |
| 54 | --n; | |
| 55 | } | |
| 56 | if (n > 0) | |
| 57 | if (*s == c) | |
| 58 | return (wchar_t *) s; | |
| 59 | ||
| 60 | return NULL; | |
| 61 | } | |
| aca6ea65 JM |
62 | libc_hidden_def (__wmemchr) |
| 63 | weak_alias (__wmemchr, wmemchr) | |
| 64 | libc_hidden_weak (wmemchr) |