crypto/o_str.c

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