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added Curl_strcasestr() for case insensitive strstr() searching

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This commit is contained in:
Daniel Stenberg 2004-06-13 08:32:57 +00:00
parent 4b3937373a
commit 61bded1d82
2 changed files with 33 additions and 11 deletions
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31
lib/strequal.c
View File

@ -1,8 +1,8 @@
/*************************************************************************** /***************************************************************************
* _ _ ____ _ * _ _ ____ _
* Project ___| | | | _ \| | * Project ___| | | | _ \| |
* / __| | | | |_) | | * / __| | | | |_) | |
* | (__| |_| | _ <| |___ * | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____| * \___|\___/|_| \_\_____|
* *
* Copyright (C) 1998 - 2004, Daniel Stenberg, <daniel@haxx.se>, et al. * Copyright (C) 1998 - 2004, Daniel Stenberg, <daniel@haxx.se>, et al.
@ -10,7 +10,7 @@
* This software is licensed as described in the file COPYING, which * This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms * you should have received as part of this distribution. The terms
* are also available at http://curl.haxx.se/docs/copyright.html. * are also available at http://curl.haxx.se/docs/copyright.html.
* *
* You may opt to use, copy, modify, merge, publish, distribute and/or sell * 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 * copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file. * furnished to do so, under the terms of the COPYING file.
@ -78,6 +78,25 @@ int curl_strnequal(const char *first, const char *second, size_t max)
#endif #endif
} }
/*
* Curl_strcasestr() finds the first occurrence of the substring needle in the
* string haystack. The terminating `\0' characters are not compared. The
* matching is done CASE INSENSITIVE, which thus is the difference between
* this and strstr().
*/
char *Curl_strcasestr(const char *haystack, const char *needle)
{
size_t nlen = strlen(needle);
size_t hlen = strlen(haystack);
while(hlen-- >= nlen) {
if(curl_strnequal(haystack, needle, nlen))
return (char *)haystack;
haystack++;
}
return NULL;
}
#ifndef HAVE_STRLCAT #ifndef HAVE_STRLCAT
/* /*
* The strlcat() function appends the NUL-terminated string src to the end * The strlcat() function appends the NUL-terminated string src to the end
@ -90,7 +109,7 @@ int curl_strnequal(const char *first, const char *second, size_t max)
* src. While this may seem somewhat confusing it was done to make trunca- * src. While this may seem somewhat confusing it was done to make trunca-
* tion detection simple. * tion detection simple.
* *
* *
*/ */
size_t Curl_strlcat(char *dst, const char *src, size_t siz) size_t Curl_strlcat(char *dst, const char *src, size_t siz)
{ {

13
lib/strequal.h
View File

@ -1,10 +1,10 @@
#ifndef __STREQUAL_H #ifndef __STREQUAL_H
#define __STREQUAL_H #define __STREQUAL_H
/*************************************************************************** /***************************************************************************
* _ _ ____ _ * _ _ ____ _
* Project ___| | | | _ \| | * Project ___| | | | _ \| |
* / __| | | | |_) | | * / __| | | | |_) | |
* | (__| |_| | _ <| |___ * | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____| * \___|\___/|_| \_\_____|
* *
* Copyright (C) 1998 - 2004, Daniel Stenberg, <daniel@haxx.se>, et al. * Copyright (C) 1998 - 2004, Daniel Stenberg, <daniel@haxx.se>, et al.
@ -12,7 +12,7 @@
* This software is licensed as described in the file COPYING, which * This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms * you should have received as part of this distribution. The terms
* are also available at http://curl.haxx.se/docs/copyright.html. * are also available at http://curl.haxx.se/docs/copyright.html.
* *
* You may opt to use, copy, modify, merge, publish, distribute and/or sell * 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 * copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file. * furnished to do so, under the terms of the COPYING file.
@ -36,6 +36,9 @@ int curl_strnequal(const char *first, const char *second, size_t max);
argument is zero-byte terminated */ argument is zero-byte terminated */
#define checkprefix(a,b) strnequal(a,b,strlen(a)) #define checkprefix(a,b) strnequal(a,b,strlen(a))
/* case insensitive strstr() */
char *Curl_strcasestr(const char *haystack, const char *needle);
#ifndef HAVE_STRLCAT #ifndef HAVE_STRLCAT
#define strlcat(x,y,z) Curl_strlcat(x,y,z) #define strlcat(x,y,z) Curl_strlcat(x,y,z)
size_t Curl_strlcat(char *dst, const char *src, size_t siz); size_t Curl_strlcat(char *dst, const char *src, size_t siz);