1 /*- 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 * Copyright (c) 2011 The FreeBSD Foundation 9 * All rights reserved. 10 * Portions of this software were developed by David Chisnall 11 * under sponsorship from the FreeBSD Foundation. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * $FreeBSD: head/lib/libc/string/strcasestr.c 251069 2013-05-28 20:57:40Z emaste $ 38 */ 39 40 #include <ctype.h> 41 #include <string.h> 42 #include "xlocale_private.h" 43 44 /* 45 * Find the first occurrence of find in s, ignore case. 46 */ 47 char * 48 strcasestr_l(const char *s, const char *find, locale_t locale) 49 { 50 char c, sc; 51 size_t len; 52 FIX_LOCALE(locale); 53 54 if ((c = *find++) != 0) { 55 c = tolower_l((unsigned char)c, locale); 56 len = strlen(find); 57 do { 58 do { 59 if ((sc = *s++) == 0) 60 return (NULL); 61 } while ((char)tolower_l((unsigned char)sc, locale) != c); 62 } while (strncasecmp_l(s, find, len, locale) != 0); 63 s--; 64 } 65 return ((char *)s); 66 } 67 char * 68 strcasestr(const char *s, const char *find) 69 { 70 return strcasestr_l(s, find, __get_locale()); 71 } 72