Commit 61bded1d authored by Daniel Stenberg's avatar Daniel Stenberg
Browse files

added Curl_strcasestr() for case insensitive strstr() searching

parent 4b393737

lib/strequal.c

+25 −6
Original line number Diff line number Diff line
@@ -78,6 +78,25 @@ int curl_strnequal(const char *first, const char *second, size_t max) 
#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

/*

 * The strlcat() function appends the NUL-terminated string src to the end

lib/strequal.h

+8 −5
Original line number Diff line number Diff line
@@ -36,6 +36,9 @@ int curl_strnequal(const char *first, const char *second, size_t max); 
   argument is zero-byte terminated */

#define checkprefix(a,b)    strnequal(a,b,strlen(a))



/* case insensitive strstr() */

char *Curl_strcasestr(const char *haystack, const char *needle);



#ifndef HAVE_STRLCAT

#define strlcat(x,y,z) Curl_strlcat(x,y,z)

size_t Curl_strlcat(char *dst, const char *src, size_t siz);