1#include <string.h>
 2
 3char *strtok(char *restrict s, const char *restrict sep)
 4{
 5	static char *p;
 6	if (!s && !(s = p)) return NULL;
 7	s += strspn(s, sep);
 8	if (!*s) return p = 0;
 9	p = s + strcspn(s, sep);
10	if (*p) *p++ = 0;
11	else p = 0;
12	return s;
13}