o_str.c revision 296465 
1/* crypto/o_str.c -*- mode:C; c-file-style: "eay" -*- */
2/*
3 * Written by Richard Levitte (richard@levitte.org) for the OpenSSL project
4 * 2003.
5 */
6/* ====================================================================
7 * Copyright (c) 2003 The OpenSSL Project.  All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in
18 *    the documentation and/or other materials provided with the
19 *    distribution.
20 *
21 * 3. All advertising materials mentioning features or use of this
22 *    software must display the following acknowledgment:
23 *    "This product includes software developed by the OpenSSL Project
24 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
25 *
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 *    endorse or promote products derived from this software without
28 *    prior written permission. For written permission, please contact
29 *    openssl-core@openssl.org.
30 *
31 * 5. Products derived from this software may not be called "OpenSSL"
32 *    nor may "OpenSSL" appear in their names without prior written
33 *    permission of the OpenSSL Project.
34 *
35 * 6. Redistributions of any form whatsoever must retain the following
36 *    acknowledgment:
37 *    "This product includes software developed by the OpenSSL Project
38 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
53 *
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com).  This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
57 *
58 */
59
60#include <ctype.h>
61#include <e_os.h>
62#include "o_str.h"
63
64#if !defined(OPENSSL_IMPLEMENTS_strncasecmp) && \
65    !defined(OPENSSL_SYSNAME_WIN32) && \
66    !defined(NETWARE_CLIB)
67# include <strings.h>
68#endif
69
70int OPENSSL_strncasecmp(const char *str1, const char *str2, size_t n)
71{
72#if defined(OPENSSL_IMPLEMENTS_strncasecmp)
73    while (*str1 && *str2 && n) {
74        int res = toupper(*str1) - toupper(*str2);
75        if (res)
76            return res < 0 ? -1 : 1;
77        str1++;
78        str2++;
79        n--;
80    }
81    if (n == 0)
82        return 0;
83    if (*str1)
84        return 1;
85    if (*str2)
86        return -1;
87    return 0;
88#else
89    /*
90     * Recursion hazard warning! Whenever strncasecmp is #defined as
91     * OPENSSL_strncasecmp, OPENSSL_IMPLEMENTS_strncasecmp must be defined as
92     * well.
93     */
94    return strncasecmp(str1, str2, n);
95#endif
96}
97
98int OPENSSL_strcasecmp(const char *str1, const char *str2)
99{
100#if defined(OPENSSL_IMPLEMENTS_strncasecmp)
101    return OPENSSL_strncasecmp(str1, str2, (size_t)-1);
102#else
103    return strcasecmp(str1, str2);
104#endif
105}
106
107int OPENSSL_memcmp(const void *v1, const void *v2, size_t n)
108{
109    const unsigned char *c1 = v1, *c2 = v2;
110    int ret = 0;
111
112    while (n && (ret = *c1 - *c2) == 0)
113        n--, c1++, c2++;
114
115    return ret;
116}
117