#define _GNU_SOURCE

#include <stdarg.h>
#include <string.h>

#include <macros.h>
#include <ints.h>
#include <map.h>


bool cmp_find(const map_t *pIN needle, const map_t *pIN haystack, usize *pOUT pos)
{
	u8* start;
	u8* substr = memmem(start = haystack->origin, haystack->len,
			needle->origin, needle->len);
	if(!substr) return false;
	debug_assert(substr > start);
	*pos = (usize) (substr - start);
	return true;
}

int cmp_find_many(usize nhaystacks; const map_t *pIN needle, usize sizes[pOUT nhaystacks], usize nhaystacks, ...)
{
	va_list v_haystacks;
	va_start(v_haystacks, nhaystacks);

	const map_t* pINOUT haystack;
	for(usize i=0;i<nhaystacks;i++)
	{
		usize *pOUT size = sizes + i;
		haystack = va_arg(v_haystacks, const map_t* pIN);
		if(!haystack || !haystack->origin) FATAL("haystack %lu was null or its origin was null", i);
		if(!cmp_find(needle, haystack, size)) return (int)i;
	}

	va_end(v_haystacks);	
	return -1;
}