ref: 7a447151ae273bf08e596f57b7b9aaa1de11da33
dir: /sys/src/ape/lib/ap/gen/strpbrk.c/
#include <string.h>
#define N 256
char*
strpbrk(const char *s, const char *b)
{
char map[N];
memset(map, 0, N);
for(;;) {
map[*b] = 1;
if(*b++ == 0)
break;
}
while(map[*s++] == 0)
;
if(*--s)
return (char*)s;
return 0;
}