projects / binutils.git / blame
| Commit | Line | Data |
|---|---|---|
| fecd2382 RP |
1 | /* strstr - find first occurrence of wanted in s |
| 2 | Copyright (C) 1989, 1990, 1991 Free Software Foundation. | |
| 3 | ||
| 4 | This file is part of GAS, the GNU Assembler. | |
| 5 | ||
| 6 | GAS is free software; you can redistribute it and/or modify | |
| 7 | it under the terms of the GNU General Public License as published by | |
| 6026cd06 | 8 | the Free Software Foundation; either version 2, or (at your option) |
| fecd2382 RP |
9 | any later version. |
| 10 | ||
| 11 | GAS is distributed in the hope that it will be useful, | |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 14 | GNU General Public License for more details. | |
| 15 | ||
| 16 | You should have received a copy of the GNU General Public License | |
| 17 | along with GAS; see the file COPYING. If not, write to | |
| 18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
| 19 | ||
| 20 | /* static const char rcsid[] = "$Id$"; */ | |
| 21 | ||
| 22 | /* If your compiler is really ansi, then you don't need this. */ | |
| 23 | #ifndef __STDC__ | |
| 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 /* __STDC__ */ | |
| 54 | ||
| 55 | /* end of strstr.c */ |