curl/lib/strequal.c

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3.0 KiB
C
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/*****************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
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* Copyright (C) 2000, Daniel Stenberg, <daniel@haxx.se>, et al.
*
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* In order to be useful for every potential user, curl and libcurl are
* dual-licensed under the MPL and the MIT/X-derivate licenses.
*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the MPL or the MIT/X-derivate
* licenses. You may pick one of these licenses.
*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
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* $Id$
*****************************************************************************/
#include "setup.h"
#include <string.h>
int curl_strequal(const char *first, const char *second)
{
#if defined(HAVE_STRCASECMP)
return !strcasecmp(first, second);
#elif defined(HAVE_STRCMPI)
return !strcmpi(first, second);
#elif defined(HAVE_STRICMP)
return !stricmp(first, second);
#else
while (*first && *second) {
if (toupper(*first) != toupper(*second)) {
break;
}
first++;
second++;
}
return toupper(*first) == toupper(*second);
#endif
}
int curl_strnequal(const char *first, const char *second, size_t max)
{
#if defined(HAVE_STRCASECMP)
return !strncasecmp(first, second, max);
#elif defined(HAVE_STRCMPI)
return !strncmpi(first, second, max);
#elif defined(HAVE_STRICMP)
return !strnicmp(first, second, max);
#else
while (*first && *second && max) {
if (toupper(*first) != toupper(*second)) {
break;
}
max--;
first++;
second++;
}
return toupper(*first) == toupper(*second);
#endif
}
#ifndef HAVE_STRLCAT
/*
* The strlcat() function appends the NUL-terminated string src to the end
* of dst. It will append at most size - strlen(dst) - 1 bytes, NUL-termi-
* nating the result.
*
* The strlcpy() and strlcat() functions return the total length of the
* string they tried to create. For strlcpy() that means the length of src.
* For strlcat() that means the initial length of dst plus the length of
* src. While this may seem somewhat confusing it was done to make trunca-
* tion detection simple.
*
*
*/
size_t strlcat(char *dst, const char *src, size_t siz)
{
char *d = dst;
const char *s = src;
size_t n = siz;
size_t dlen;
/* Find the end of dst and adjust bytes left but don't go past end */
while (n-- != 0 && *d != '\0')
d++;
dlen = d - dst;
n = siz - dlen;
if (n == 0)
return(dlen + strlen(s));
while (*s != '\0') {
if (n != 1) {
*d++ = *s;
n--;
}
s++;
}
*d = '\0';
return(dlen + (s - src)); /* count does not include NUL */
}
#endif