compat/strcasestr.c

   1 #include <string.h>
   2 #include <ctype.h>
   3
   4 char *gitstrcasestr(const char *haystack, const char *needle)
   5 {
   6         int nlen = strlen(needle);
   7         int hlen = strlen(haystack) - nlen + 1;
   8         int i;
   9
  10         for (i = 0; i < hlen; i++) {
  11                 int j;
  12                 for (j = 0; j < nlen; j++) {
  13                         unsigned char c1 = haystack[i+j];
  14                         unsigned char c2 = needle[j];
  15                         if (toupper(c1) != toupper(c2))
  16                                 goto next;
  17                 }
  18                 return (char *) haystack + i;
  19         next:
  20                 ;
  21         }
  22         return NULL;
  23 }