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 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* 34 * Portions copyright (c) 2014, ARM Limited and Contributors. 35 * All rights reserved. 36 */ 37 38 #include <sys/cdefs.h> 39 #include <sys/ctype.h> 40 #include <string.h> 41 42 /* 43 * Compare strings. 44 */ 45 int 46 strcmp(const char *s1, const char *s2) 47 { 48 while (*s1 == *s2++) 49 if (*s1++ == '\0') 50 return 0; 51 return *(const unsigned char *)s1 - *(const unsigned char *)(s2 - 1); 52 } 53 54 int 55 strcasecmp(const char *s1, const char *s2) 56 { 57 const unsigned char *us1 = (const unsigned char *)s1; 58 const unsigned char *us2 = (const unsigned char *)s2; 59 60 while (tolower(*us1) == tolower(*us2)) { 61 if (*us1++ == '\0') 62 return 0; 63 us2++; 64 } 65 return tolower(*us1) - tolower(*us2); 66 } 67
