1/*
2 * strcasecmp() implementation for systems that don't have it or stricmp()
3 * or strcmpi().
4 *
5 * Copyright (c) 1987, 1993
6 *      The Regents of the University of California.  All rights reserved.
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 * 3. 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#include "util.h"
33
34#ifndef USE_OUR_OWN_STRCASECMP
35#undef yasm__strcasecmp
36#undef yasm__strncasecmp
37#endif
38
39#if defined(LIBC_SCCS) && !defined(lint)
40static char sccsid[] = "@(#)strcasecmp.c        8.1 (Berkeley) 6/4/93";
41#endif /* LIBC_SCCS and not lint */
42
43#include <ctype.h>
44
45int
46yasm__strcasecmp(const char *s1, const char *s2)
47{
48#ifdef HAVE_STRCASECMP
49    return strcasecmp(s1, s2);
50#elif HAVE_STRICMP
51    return stricmp(s1, s2);
52#elif HAVE__STRICMP
53    return _stricmp(s1, s2);
54#elif HAVE_STRCMPI
55    return strcmpi(s1, s2);
56#else
57        const unsigned char
58                        *us1 = (const unsigned char *)s1,
59                        *us2 = (const unsigned char *)s2;
60
61        while (tolower(*us1) == tolower(*us2++))
62                if (*us1++ == '\0')
63                        return (0);
64        return (tolower(*us1) - tolower(*--us2));
65#endif
66}
67
68int
69yasm__strncasecmp(const char *s1, const char *s2, size_t n)
70{
71#ifdef HAVE_STRCASECMP
72    return strncasecmp(s1, s2, n);
73#elif HAVE_STRICMP
74    return strnicmp(s1, s2, n);
75#elif HAVE__STRNICMP
76    return _strnicmp(s1, s2, n);
77#elif HAVE_STRCMPI
78    return strncmpi(s1, s2, n);
79#else
80        const unsigned char
81                        *us1 = (const unsigned char *)s1,
82                        *us2 = (const unsigned char *)s2;
83
84        if (n != 0) {
85                do {
86                        if (tolower(*us1) != tolower(*us2++))
87                                return (tolower(*us1) - tolower(*--us2));
88                        if (*us1++ == '\0')
89                                break;
90                } while (--n != 0);
91        }
92        return (0);
93#endif
94}
95