| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2002 Manuel Novoa III |
| 3 | * Copyright (C) 2000-2005 Erik Andersen <andersen@uclibc.org> |
| 4 | * |
| 5 | * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. |
| 6 | */ |
| 7 | |
| 8 | #include "_string.h" |
| 9 | |
| 10 | #ifdef WANT_WIDE |
| 11 | # define Wstrstr wcsstr |
| 12 | #else |
| 13 | # define Wstrstr strstr |
| 14 | #endif |
| 15 | |
| 16 | /* NOTE: This is the simple-minded O(len(s1) * len(s2)) worst-case approach. */ |
| 17 | |
| 18 | Wchar *Wstrstr(const Wchar *s1, const Wchar *s2) |
| 19 | { |
| 20 | register const Wchar *s = s1; |
| 21 | register const Wchar *p = s2; |
| 22 | |
| 23 | do { |
| 24 | if (!*p) { |
| 25 | return (Wchar *) s1;; |
| 26 | } |
| 27 | if (*p == *s) { |
| 28 | ++p; |
| 29 | ++s; |
| 30 | } else { |
| 31 | p = s2; |
| 32 | if (!*s) { |
| 33 | return NULL; |
| 34 | } |
| 35 | s = ++s1; |
| 36 | } |
| 37 | } while (1); |
| 38 | } |
| 39 | #ifndef WANT_WIDE |
| 40 | libc_hidden_def(strstr) |
| 41 | #elif defined __UCLIBC_SUSV3_LEGACY__ |
| 42 | strong_alias(wcsstr,wcswcs) |
| 43 | #endif |