/*
 * strcspn - find length of initial segment of s consisting entirely
 * of characters not from reject
 */

SIZET
strcspn(s, reject)
CONST char *s;
CONST char *reject;
{
         register CONST char *scan;
         register CONST char *rscan;
         register SIZET count;

         count = 0;
         for (scan = s; *scan != '\0'; scan++) {
                   for (rscan = reject; *rscan != '\0';)   /* ++ moved down. */
                             if (*scan == *rscan++)
                                       return(count);
                   count++;
         }
         return(count);
}