1 #include "config.h" 2 3 #if HAVE_STRCASESTR 4 5 int dummy; 6 7 #else 8 9 /* $Id: compat_strcasestr.c,v 1.4 2014/12/11 09:19:32 schwarze Exp $ */ 10 /* $NetBSD: strcasestr.c,v 1.3 2005/11/29 03:12:00 christos Exp $ */ 11 12 /*- 13 * Copyright (c) 1990, 1993 14 * The Regents of the University of California. All rights reserved. 15 * 16 * This code is derived from software contributed to Berkeley by 17 * Chris Torek. 18 * 19 * Redistribution and use in source and binary forms, with or without 20 * modification, are permitted provided that the following conditions 21 * are met: 22 * 1. Redistributions of source code must retain the above copyright 23 * notice, this list of conditions and the following disclaimer. 24 * 2. Redistributions in binary form must reproduce the above copyright 25 * notice, this list of conditions and the following disclaimer in the 26 * documentation and/or other materials provided with the distribution. 27 * 3. Neither the name of the University nor the names of its contributors 28 * may be used to endorse or promote products derived from this software 29 * without specific prior written permission. 30 * 31 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 32 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 33 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 34 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 35 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 39 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 40 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 41 * SUCH DAMAGE. 42 */ 43 44 #include <sys/types.h> 45 #include <ctype.h> 46 #include <string.h> 47 48 #define __UNCONST(a) ((void *)(unsigned long)(const void *)(a)) 49 50 /* 51 * Find the first occurrence of find in s, ignore case. 52 */ 53 char * 54 strcasestr(const char *s, const char *find) 55 { 56 char c, sc; 57 size_t len; 58 59 if ((c = *find++) != 0) { 60 c = tolower((unsigned char)c); 61 len = strlen(find); 62 do { 63 do { 64 if ((sc = *s++) == 0) 65 return (NULL); 66 } while ((char)tolower((unsigned char)sc) != c); 67 } while (strncasecmp(s, find, len) != 0); 68 s--; 69 } 70 return __UNCONST(s); 71 } 72 73 #endif 74