#include <stdlib.h>

#include "gbasm/assemble.h"
#include "gbasm/parser.h"
#include "gbasm/types.h"
#include "gbasm/errors.h"
#include "gbasm/opcodes.h"
#include "common.h"

#define GBASM_MAX_INSTS 1024

struct gb_asm_prog *prog;

int gbasm_assemble(char *program, struct emitter *emitter)
{
	struct gbasm_parsed_inst insts[GBASM_MAX_INSTS];
	int num_insts;

	num_insts = gbasm_parse_buffer(program, insts, ARRAY_SIZE(insts));
	if (num_insts < 0) {
		return num_insts;
	}

	DEBUG_LOG("parsed %d instructions\n", num_insts);
	
	for (int i = 0; i < num_insts; i++) {
		DEBUG_LOG("emitting %s\n", insts[i].opcode);
		const struct gbasm_op_info *info = gbasm_get_opcode_info(insts[i].opcode);
		if (info == NULL) {
			gbasm_unknown_opcode_error(&insts[i]);
		}
		
		info->check(&insts[i], info);
		info->emit(emitter, &insts[i]);
	}
	
	return 0;
}