projects / apple / libc.git / blame
| Commit | Line | Data |
|---|---|---|
| 5b2abdfb | 1 | /*- |
| e9ce8d39 A |
2 | * Copyright (c) 1990, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. | |
| 4 | * | |
| 5 | * This code is derived from software contributed to Berkeley by | |
| 6 | * Chris Torek. | |
| 7 | * | |
| 8 | * Redistribution and use in source and binary forms, with or without | |
| 9 | * modification, are permitted provided that the following conditions | |
| 10 | * are met: | |
| 11 | * 1. Redistributions of source code must retain the above copyright | |
| 12 | * notice, this list of conditions and the following disclaimer. | |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 14 | * notice, this list of conditions and the following disclaimer in the | |
| 15 | * documentation and/or other materials provided with the distribution. | |
| 16 | * 3. All advertising materials mentioning features or use of this software | |
| 17 | * must display the following acknowledgement: | |
| 18 | * This product includes software developed by the University of | |
| 19 | * California, Berkeley and its contributors. | |
| 20 | * 4. Neither the name of the University nor the names of its contributors | |
| 21 | * may be used to endorse or promote products derived from this software | |
| 22 | * without specific prior written permission. | |
| 23 | * | |
| 24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 34 | * SUCH DAMAGE. | |
| 35 | */ | |
| 36 | ||
| 9385eb3d A |
37 | #include <sys/cdefs.h> |
| 38 | __FBSDID("$FreeBSD: src/lib/libc/string/strcasestr.c,v 1.3 2002/03/21 18:44:54 obrien Exp $"); | |
| 39 | ||
| 40 | #include <ctype.h> | |
| 41 | #include <string.h> | |
| 42 | ||
| e9ce8d39 | 43 | /* |
| 9385eb3d | 44 | * Find the first occurrence of find in s, ignore case. |
| e9ce8d39 | 45 | */ |
| 9385eb3d A |
46 | char * |
| 47 | strcasestr(s, find) | |
| 48 | const char *s, *find; | |
| 49 | { | |
| 50 | char c, sc; | |
| 51 | size_t len; | |
| e9ce8d39 | 52 | |
| 9385eb3d A |
53 | if ((c = *find++) != 0) { |
| 54 | c = tolower((unsigned char)c); | |
| 55 | len = strlen(find); | |
| 56 | do { | |
| 57 | do { | |
| 58 | if ((sc = *s++) == 0) | |
| 59 | return (NULL); | |
| 60 | } while ((char)tolower((unsigned char)sc) != c); | |
| 61 | } while (strncasecmp(s, find, len) != 0); | |
| 62 | s--; | |
| 63 | } | |
| 64 | return ((char *)s); | |
| 65 | } |