154 lines
4.1 KiB
C
154 lines
4.1 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2007, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at http://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* $Id$
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***************************************************************************/
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#ifndef _GNU_SOURCE
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/* glibc needs this to define the prototype for strcasestr */
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#define _GNU_SOURCE 1
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#endif
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#include "setup.h"
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#include <string.h>
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#include <ctype.h>
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#ifdef HAVE_STRINGS_H
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#include <strings.h>
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#endif
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#include "strequal.h"
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#if defined(HAVE_STRCASECMP) && defined(__STRICT_ANSI__)
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/* this is for "-ansi -Wall -pedantic" to stop complaining! */
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extern int (strcasecmp)(const char *s1, const char *s2);
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extern int (strncasecmp)(const char *s1, const char *s2, size_t n);
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#endif
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int curl_strequal(const char *first, const char *second)
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{
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#if defined(HAVE_STRCASECMP)
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return !(strcasecmp)(first, second);
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#elif defined(HAVE_STRCMPI)
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return !(strcmpi)(first, second);
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#elif defined(HAVE_STRICMP)
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return !(stricmp)(first, second);
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#else
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while(*first && *second) {
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if(toupper(*first) != toupper(*second)) {
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break;
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}
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first++;
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second++;
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}
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return toupper(*first) == toupper(*second);
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#endif
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}
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int curl_strnequal(const char *first, const char *second, size_t max)
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{
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#if defined(HAVE_STRCASECMP)
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return !strncasecmp(first, second, max);
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#elif defined(HAVE_STRCMPI)
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return !strncmpi(first, second, max);
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#elif defined(HAVE_STRICMP)
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return !strnicmp(first, second, max);
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#else
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while(*first && *second && max) {
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if(toupper(*first) != toupper(*second)) {
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break;
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}
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max--;
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first++;
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second++;
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}
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if(0 == max)
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return 1; /* they are equal this far */
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return toupper(*first) == toupper(*second);
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#endif
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}
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/*
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* Curl_strcasestr() finds the first occurrence of the substring needle in the
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* string haystack. The terminating `\0' characters are not compared. The
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* matching is done CASE INSENSITIVE, which thus is the difference between
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* this and strstr().
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*/
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char *Curl_strcasestr(const char *haystack, const char *needle)
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{
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#if defined(HAVE_STRCASESTR)
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return strcasestr(haystack, needle);
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#else
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size_t nlen = strlen(needle);
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size_t hlen = strlen(haystack);
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while(hlen-- >= nlen) {
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if(curl_strnequal(haystack, needle, nlen))
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return (char *)haystack;
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haystack++;
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}
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return NULL;
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#endif
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}
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#ifndef HAVE_STRLCAT
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/*
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* The strlcat() function appends the NUL-terminated string src to the end
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* of dst. It will append at most size - strlen(dst) - 1 bytes, NUL-termi-
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* nating the result.
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*
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* The strlcpy() and strlcat() functions return the total length of the
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* string they tried to create. For strlcpy() that means the length of src.
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* For strlcat() that means the initial length of dst plus the length of
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* src. While this may seem somewhat confusing it was done to make trunca-
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* tion detection simple.
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*
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*
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*/
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size_t Curl_strlcat(char *dst, const char *src, size_t siz)
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{
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char *d = dst;
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const char *s = src;
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size_t n = siz;
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size_t dlen;
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/* Find the end of dst and adjust bytes left but don't go past end */
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while(n-- != 0 && *d != '\0')
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d++;
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dlen = d - dst;
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n = siz - dlen;
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if(n == 0)
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return(dlen + strlen(s));
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while(*s != '\0') {
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if(n != 1) {
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*d++ = *s;
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n--;
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}
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s++;
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}
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*d = '\0';
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return(dlen + (s - src)); /* count does not include NUL */
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}
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#endif
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