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
strcmp(const char * s1,const char * s2)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
strcasecmp(const char * s1,const char * s2)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