src/system/libroot/posix/string/strspn.c

   1 /*
   2 ** Copyright 2001, Travis Geiselbrecht. All rights reserved.
   3 ** Distributed under the terms of the NewOS License.
   4 */
   5
   6 #include <sys/types.h>
   7 #include <string.h>
   8
   9
  10 size_t
  11 strspn(char const *s, char const *accept)
  12 {
  13         const char *p;
  14         const char *a;
  15         size_t count = 0;
  16
  17         for (p = s; *p != '\0'; ++p) {
  18                 for (a = accept; *a != '\0'; ++a) {
  19                         if (*p == *a)
  20                                 break;
  21                 }
  22                 if (*a == '\0')
  23                         return count;
  24                 ++count;
  25         }
  26
  27         return count;
  28 }