1 | /* Copyright (C) 1991-2022 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
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. |
8 | |
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 |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <string.h> |
19 | |
20 | #undef strrchr |
21 | |
22 | #ifndef STRRCHR |
23 | # define STRRCHR strrchr |
24 | #endif |
25 | |
26 | /* Find the last occurrence of C in S. */ |
27 | char * |
28 | STRRCHR (const char *s, int c) |
29 | { |
30 | const char *found, *p; |
31 | |
32 | c = (unsigned char) c; |
33 | |
34 | /* Since strchr is fast, we use it rather than the obvious loop. */ |
35 | |
36 | if (c == '\0') |
37 | return strchr (s, '\0'); |
38 | |
39 | found = NULL; |
40 | while ((p = strchr (s, c)) != NULL) |
41 | { |
42 | found = p; |
43 | s = p + 1; |
44 | } |
45 | |
46 | return (char *) found; |
47 | } |
48 | |
49 | #ifdef weak_alias |
50 | #undef rindex |
51 | weak_alias (strrchr, rindex) |
52 | #endif |
53 | libc_hidden_builtin_def (strrchr) |
54 | |