o_str.c

mediastreamer2是开源的网络传输媒体流的库

/* crypto/o_str.c -*- mode:C; c-file-style: "eay" -*- */
/* Written by Richard Levitte ([e-mail]) for the OpenSSL
 * project 2003.
 */
/* ====================================================================
 * Copyright (c) 2003 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    [e-mail].
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * ([e-mail]).  This product includes software written by Tim
 * Hudson ([e-mail]).
 *
 */

#include <ctype.h>
#include <e_os.h>
#include "o_str.h"

int OPENSSL_strncasecmp(const char *str1, const char *str2, size_t n)
	{
#if defined(OPENSSL_IMPLEMENTS_strncasecmp)
	while (*str1 && *str2 && n)
		{
		int res = toupper(*str1) - toupper(*str2);
		if (res) return res < 0 ? -1 : 1;
		str1++;
		str2++;
		n--;
		}
	if (n == 0)
		return 0;
	if (*str1)
		return 1;
	if (*str2)
		return -1;
	return 0;
#else
	/* Recursion hazard warning! Whenever strncasecmp is #defined as
	 * OPENSSL_strncasecmp, OPENSSL_IMPLEMENTS_strncasecmp must be
	 * defined as well. */
	return strncasecmp(str1, str2, n);
#endif
	}
int OPENSSL_strcasecmp(const char *str1, const char *str2)
	{
#if defined(OPENSSL_IMPLEMENTS_strncasecmp)
	return OPENSSL_strncasecmp(str1, str2, (size_t)-1);
#else
	return strcasecmp(str1, str2);
#endif
	}

int OPENSSL_memcmp(const void *v1,const void *v2,size_t n)
	{
	const unsigned char *c1=v1,*c2=v2;
	int ret=0;

	while(n && (ret=*c1-*c2)==0) n--,c1++,c2++;

	return ret;
	}