git: 9front

ref: 5f1b9c822e13709fd6e73f281f116a8b7c802ab7
dir: /sys/src/libc/port/strpbrk.c/

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#include <u.h>
#include <libc.h>
#define	N	256

char*
strpbrk(char *cs, char *cb)
{
	char map[N];
	uchar *s=(uchar*)cs, *b=(uchar*)cb;

	memset(map, 0, N);
	for(;;) {
		map[*b] = 1;
		if(*b++ == 0)
			break;
	}
	while(map[*s++] == 0)
		;
	if(*--s)
		return (char*)s;
	return 0;
}