ref: 82435c350a1d3530c87ea88ada68e984fc6b9b80
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; }