1 /* 2 * Copyright (c) 1987, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 35 #include <ctype.h> 36 #include <strings.h> 37 38 39 int 40 strcasecmp(const char *s1, const char *s2) 41 { 42 const u_char *us1 = (const u_char *)s1; 43 const u_char *us2 = (const u_char *)s2; 44 45 while (tolower(*us1) == tolower(*us2++)) { 46 if (*us1++ == '\0') 47 return 0; 48 } 49 50 return tolower(*us1) - tolower(*--us2); 51 } 52 53 54 int 55 strncasecmp(const char *s1, const char *s2, size_t n) 56 { 57 if (n != 0) { 58 const u_char *us1 = (const u_char *)s1; 59 const u_char *us2 = (const u_char *)s2; 60 61 do { 62 if (tolower(*us1) != tolower(*us2++)) 63 return tolower(*us1) - tolower(*--us2); 64 if (*us1++ == '\0') 65 break; 66 } while (--n != 0); 67 } 68 return 0; 69 } 70 71 72 int 73 strcasecmp_l(const char *s1, const char *s2, locale_t locale) 74 { 75 const u_char *us1 = (const u_char *)s1; 76 const u_char *us2 = (const u_char *)s2; 77 78 while (tolower_l(*us1, locale) == tolower_l(*us2++, locale)) { 79 if (*us1++ == '\0') 80 return 0; 81 } 82 83 return tolower_l(*us1, locale) - tolower_l(*--us2, locale); 84 } 85 86 87 int 88 strncasecmp_l(const char *s1, const char *s2, size_t n, locale_t locale) 89 { 90 if (n != 0) { 91 const u_char *us1 = (const u_char *)s1; 92 const u_char *us2 = (const u_char *)s2; 93 94 do { 95 if (tolower_l(*us1, locale) != tolower_l(*us2++, locale)) 96 return tolower_l(*us1, locale) - tolower_l(*--us2, locale); 97 if (*us1++ == '\0') 98 break; 99 } while (--n != 0); 100 } 101 return 0; 102 } 103