ref: b44a95b8fbe1a524074dfcb96ee5efb89c9a1c9a
dir: /libc/src/strspn.c/
/* See LICENSE file for copyright and license details. */
#include <string.h>
size_t
strspn(const char *s1, const char *s2)
{
size_t n;
int c;
const char *p;
for (n = 0; c = *s1++; ++n) {
for (p = s2; *p && *p != c; ++p)
/* nothing */;
if (*p == '\0')
break;
}
return n;
}