/*
 * Copyright (C) 2023 Johnny Richard
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
#ifndef GAS_ASSEMBLY_GENERATOR_H
#define GAS_ASSEMBLY_GENERATOR_H

#include "ast.h"
#include "vector.h"
#include <stdio.h>

typedef enum evaluation_result_kind_t
{
  EVALUATION_RESULT_VOID,
  EVALUATION_RESULT_ON_RAX,
  EVALUATION_RESULT_ON_STACK,
  EVALUATION_RESULT_AS_LITERAL_INTEGER
} evaluation_result_kind_t;

typedef union evaluation_result_data_t
{
  int64_t literal_int;
  int stack_offset;
} evaluation_result_data_t;

typedef struct evaluation_result_t
{
  evaluation_result_kind_t kind;
  evaluation_result_data_t data;
} evaluation_result_t;

typedef struct gas_assembly_generator_t
{
  FILE *stream;
  vector_t *refs;
  int stack_offset;
  uint64_t label_counter;
  evaluation_result_t latest_evaluation;
} gas_assembly_generator_t;

void
gas_assembly_generator_init(gas_assembly_generator_t *gen, FILE *stream);

void
gas_assembly_generator_compile(gas_assembly_generator_t *gen, ast_node_t *ast);

#endif /* GAS_ASSEMBLY_GENERATOR_H */