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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2008, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at http://curl.haxx.se/docs/copyright.html.
*
* 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 COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* $Id$
***************************************************************************/
#include "setup.h"
#include <string.h>
#include <ctype.h>
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#include "strequal.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_STRNCASECMP)
return !strncasecmp(first, second, max);
#elif defined(HAVE_STRNCMPI)
return !strncmpi(first, second, max);
#elif defined(HAVE_STRNICMP)
return !strnicmp(first, second, max);
#else
while(*first && *second && max) {
if(toupper(*first) != toupper(*second)) {
break;
}
max--;
first++;
second++;
}
if(0 == max)
return 1; /* they are equal this far */
return toupper(*first) == toupper(*second);
#endif
}
/* Portable toupper (remember EBCDIC). Do not use tupper() because
its behavior is altered by the current locale. */
static bool my_toupper(unsigned char in)
{
switch (in) {
case 'a':
return 'A';
case 'b':
return 'B';
case 'c':
return 'C';
case 'd':
return 'D';
case 'e':
return 'E';
case 'f':
return 'F';
case 'g':
return 'G';
case 'h':
return 'H';
case 'i':
return 'I';
case 'j':
return 'J';
case 'k':
return 'K';
case 'l':
return 'L';
case 'm':
return 'M';
case 'n':
return 'N';
case 'o':
return 'O';
case 'p':
return 'P';
case 'q':
return 'Q';
case 'r':
return 'R';
case 's':
return 'S';
case 't':
return 'T';
case 'u':
return 'U';
case 'v':
return 'V';
case 'w':
return 'W';
case 'x':
return 'X';
case 'y':
return 'Y';
case 'z':
return 'Z';
}
return in;
}
/*
* Curl_ascii_equal() is for doing "ascii" case insensitive strings. This is
* meant to be locale independent and only compare strings we know are safe
* for this.
* See http://daniel.haxx.se/blog/2008/10/15/strcasecmp-in-turkish/ for some
* further explanation to why this function is necessary.
*/
int Curl_ascii_equal(const char *first, const char *second)
{
while(*first && *second) {
if(! (my_toupper(*first) == my_toupper(*second)))
/* get out of the loop as soon as they don't match */
break;
first++;
second++;
}
/* we do the comparison here (possibly again), just to make sure that if the
loop above is skipped because one of the strings reached zero, we must not
return this as a successful match */
return (my_toupper(*first) == my_toupper(*second));
}
#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 Curl_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
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