shithub: plan9front

ref: 407cf4ac6e59556b65d29b3c0de6ada6fdcc3cc7
dir: /sys/src/ape/lib/ap/gen/strpbrk.c/

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#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;
}