Function strcspn

v2/engine/regexp.c:1311–1328

 */

static int
strcspn(
    char *s1,
    char *s2 )
{
    register char *scan1;
    register char *scan2;
    register int count;

    count = 0;
    for (scan1 = s1; *scan1 != '\0'; scan1++) {
        for (scan2 = s2; *scan2 != '\0';)   /* ++ moved down. */
            if (*scan1 == *scan2++)
                return(count);
        count++;
    }
    return(count);
}
#endif