| Darren Tucker | afec077 | 2016-12-13 10:23:03 +1100 | [diff] [blame] | 1 | /* $OpenBSD: strcasestr.c,v 1.4 2015/08/31 02:53:57 guenther Exp $ */ |
| 2 | /* $NetBSD: strcasestr.c,v 1.2 2005/02/09 21:35:47 kleink Exp $ */ |
| 3 | |
| 4 | /*- |
| 5 | * Copyright (c) 1990, 1993 |
| 6 | * The Regents of the University of California. All rights reserved. |
| 7 | * |
| 8 | * This code is derived from software contributed to Berkeley by |
| 9 | * Chris Torek. |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer. |
| 16 | * 2. Redistributions in binary form must reproduce the above copyright |
| 17 | * notice, this list of conditions and the following disclaimer in the |
| 18 | * documentation and/or other materials provided with the distribution. |
| 19 | * 3. Neither the name of the University nor the names of its contributors |
| 20 | * may be used to endorse or promote products derived from this software |
| 21 | * without specific prior written permission. |
| 22 | * |
| 23 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 24 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 28 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 29 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 30 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 31 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 32 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 33 | * SUCH DAMAGE. |
| 34 | */ |
| 35 | |
| 36 | /* OPENBSD ORIGINAL: lib/libc/string/strcasestr.c */ |
| 37 | |
| 38 | #include "includes.h" |
| 39 | |
| 40 | #ifndef HAVE_STRCASESTR |
| 41 | |
| 42 | #include <ctype.h> |
| 43 | #include <string.h> |
| 44 | |
| 45 | /* |
| 46 | * Find the first occurrence of find in s, ignore case. |
| 47 | */ |
| 48 | char * |
| 49 | strcasestr(const char *s, const char *find) |
| 50 | { |
| 51 | char c, sc; |
| 52 | size_t len; |
| 53 | |
| 54 | if ((c = *find++) != 0) { |
| 55 | c = (char)tolower((unsigned char)c); |
| 56 | len = strlen(find); |
| 57 | do { |
| 58 | do { |
| 59 | if ((sc = *s++) == 0) |
| 60 | return (NULL); |
| 61 | } while ((char)tolower((unsigned char)sc) != c); |
| 62 | } while (strncasecmp(s, find, len) != 0); |
| 63 | s--; |
| 64 | } |
| 65 | return ((char *)s); |
| 66 | } |
| 67 | DEF_WEAK(strcasestr); |
| 68 | |
| 69 | #endif |