| 1 | /* strstr - find first occurrence of wanted in s |
| 2 | |
| 3 | Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation. |
| 4 | |
| 5 | This file is part of GAS, the GNU Assembler. |
| 6 | |
| 7 | GAS is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2, or (at your option) |
| 10 | any later version. |
| 11 | |
| 12 | GAS is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with GAS; see the file COPYING. If not, write to |
| 19 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 20 | |
| 21 | /* If your compiler is really ansi, then you don't need this. */ |
| 22 | |
| 23 | #if __STDC__ != 1 |
| 24 | |
| 25 | #define SIZET int |
| 26 | |
| 27 | #define NULL 0 |
| 28 | |
| 29 | #include <string.h> |
| 30 | |
| 31 | char * /* found string, or NULL if none */ |
| 32 | strstr(s, wanted) |
| 33 | char *s; |
| 34 | char *wanted; |
| 35 | { |
| 36 | register char *scan; |
| 37 | register SIZET len; |
| 38 | register char firstc; |
| 39 | |
| 40 | /* |
| 41 | * The odd placement of the two tests is so "" is findable. |
| 42 | * Also, we inline the first char for speed. |
| 43 | * The ++ on scan has been moved down for optimization. |
| 44 | */ |
| 45 | firstc = *wanted; |
| 46 | len = strlen(wanted); |
| 47 | for (scan = s; *scan != firstc || strncmp(scan, wanted, len) != 0; ) |
| 48 | if (*scan++ == '\0') |
| 49 | return(NULL); |
| 50 | return(scan); |
| 51 | } /* strstr() */ |
| 52 | |
| 53 | #endif /* not __STDC__ */ |
| 54 | |
| 55 | /* end of strstr.c */ |