git: 9front

ref: b4dc52ebf70ffa18e9a7a2b3cee5ff143d8bd5ce
dir: /sys/src/ape/lib/ap/gen/memccpy.c/

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#include <string.h>

void*
memccpy(void *a1, void *a2, int c, size_t n)
{
	unsigned char *s1, *s2;

	s1 = a1;
	s2 = a2;
	c &= 0xFF;
	while(n > 0) {
		if((*s1++ = *s2++) == c)
			return s1;
		n--;
	}
	return 0;
}