ref: 351881313c73f9276a102d1508ca59e3cc8ad7b1
dir: /lib/c/strpbrk.c/
#include <string.h>
#undef strpbrk
char *
strpbrk(const char *s1, const char *s2)
{
const unsigned char *s = s1;
const unsigned char *accept = s2;
unsigned ch;
char buf[__NUMCHARS];
memset(buf, 0, sizeof(buf));
while (ch = *accept++)
buf[ch] = 1;
while ((ch = *s) && !buf[ch])
s++;
return (ch == '\0') ? NULL : (char *) s;
}