ref: a9e7bd9ed9a7e4166348af13878ab0f953d77bb5
dir: /lib/c/strpbrk.c/
#include <string.h>
#undef strpbrk
char *
strpbrk(const char *s1, const char *s2)
{
int c;
const char *p;
for (; c = *s1; ++s1) {
for (p = s2; *p && *p != c; ++p)
;
if (*p == c)
return s1;
}
return NULL;
}