1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1987, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Copyright (c) 2011 The FreeBSD Foundation 8 * 9 * Portions of this software were developed by David Chisnall 10 * under sponsorship from the FreeBSD Foundation. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. 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 37 #if defined(LIBC_SCCS) && !defined(lint) 38 static char sccsid[] = "@(#)strcasecmp.c 8.1 (Berkeley) 6/4/93"; 39 #endif /* LIBC_SCCS and not lint */ 40 #include <strings.h> 41 #include <ctype.h> 42 #include "xlocale_private.h" 43 44 int 45 strcasecmp_l(const char *s1, const char *s2, locale_t locale) 46 { 47 const u_char 48 *us1 = (const u_char *)s1, 49 *us2 = (const u_char *)s2; 50 FIX_LOCALE(locale); 51 52 while (tolower_l(*us1, locale) == tolower_l(*us2++, locale)) 53 if (*us1++ == '\0') 54 return (0); 55 return (tolower_l(*us1, locale) - tolower_l(*--us2, locale)); 56 } 57 int 58 strcasecmp(const char *s1, const char *s2) 59 { 60 return strcasecmp_l(s1, s2, __get_locale()); 61 } 62 63 int 64 strncasecmp_l(const char *s1, const char *s2, size_t n, locale_t locale) 65 { 66 FIX_LOCALE(locale); 67 if (n != 0) { 68 const u_char 69 *us1 = (const u_char *)s1, 70 *us2 = (const u_char *)s2; 71 72 do { 73 if (tolower_l(*us1, locale) != tolower_l(*us2++, locale)) 74 return (tolower_l(*us1, locale) - tolower_l(*--us2, locale)); 75 if (*us1++ == '\0') 76 break; 77 } while (--n != 0); 78 } 79 return (0); 80 } 81 82 int 83 strncasecmp(const char *s1, const char *s2, size_t n) 84 { 85 return strncasecmp_l(s1, s2, n, __get_locale()); 86 } 87