Annotation of prex/usr/lib/libc/string/strcasecmp.c, Revision 1.1.1.1
1.1 nbrk 1: /* $NetBSD: strcasecmp.c,v 1.16 2003/08/07 16:43:49 agc Exp $ */
2:
3: /*
4: * Copyright (c) 1987, 1993
5: * The Regents of the University of California. All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * 3. Neither the name of the University nor the names of its contributors
16: * may be used to endorse or promote products derived from this software
17: * without specific prior written permission.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29: * SUCH DAMAGE.
30: */
31:
32: #include <sys/cdefs.h>
33: #include <ctype.h>
34: #include <string.h>
35:
36: int
37: strcasecmp(s1, s2)
38: const char *s1, *s2;
39: {
40: const unsigned char *us1 = (const unsigned char *)s1,
41: *us2 = (const unsigned char *)s2;
42:
43: while (tolower(*us1) == tolower(*us2++))
44: if (*us1++ == '\0')
45: return (0);
46: return (tolower(*us1) - tolower(*--us2));
47: }
48:
49: int
50: strncasecmp(s1, s2, n)
51: const char *s1, *s2;
52: size_t n;
53: {
54: if (s1 == NULL || s2 == NULL)
55: return (0);
56:
57: if (n != 0) {
58: const unsigned char *us1 = (const unsigned char *)s1,
59: *us2 = (const unsigned 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: }
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