//! Displaying match data

#include <stdio.h>
#include <stdlib.h>

#include <macros.h>
#include <comp.h>
#include <display.h>

static void _display_normal(FILE* output, dispin_t*pIN input, dispflags_t flags)
{
	slice_t cslice = input->cslice;
	const void* base = input->base;
	usize i = input->index;

#ifdef _DEBUG_MANCALC_OFFSETS
	struct {
		usize start, end;
	} pos = {
		.start = AS(cslice.ptr - base, usize),
	};
	pos.end = pos.start + cslice.len;
#else
	let pos = slice_sted((slice_t[]){ SLICE(AS(cslice.ptr - base, usize), cslice.len)});
#endif
	INFO("Mapped region slice for %lu, pre-transform (at %p): " SLICE_FORMAT ", len: %lu", i+1, base, SLICE_FORMAT_ARGS(&cslice), cslice.len);

	//TODO: Honour `flags`
	IGNORE(flags);
	fprintf(output, "match: %lu: %lu -> %lu\n", i+1, pos.start, pos.end);
} 

void display_result(FILE* output, dispin_t input, dispkind_t how, dispflags_t flags)
{
	flags = flags ?: DISPLAY_FLAGS_DEFAULT;
	output = output ?: stdout;
	debug_assert(input);

	TRACE("Outputting as %d to %p with flags 0x%08lx", (int)how, output, (usize)flags);
	switch(how)
	{
		case DISPK_NORMAL:
			_display_normal(output, &input, flags);
			break;
		case DISPK_CSV:
		case DISPK_BINARY:
		case DISPK_INI:
		default: COLD_EXPR(FATAL("unknown or unimplemented display kind: %d", (int)how));
	}
}