#ifndef MRUBY_DEBUG_H
#define MRUBY_DEBUG_H

#include <stdint.h>
#include "mruby/value.h"

typedef enum mrb_debug_line_type {
  mrb_debug_line_ary = 0,
  mrb_debug_line_flat_map = 1
} mrb_debug_line_type;

typedef struct mrb_irep_debug_info_line {
  uint32_t start_pos;
  uint16_t line;
} mrb_irep_debug_info_line;

typedef struct mrb_irep_debug_info_file {
  uint32_t start_pos;
  char const* filename;
  mrb_sym filename_sym;
  uint32_t line_entry_count;
  mrb_debug_line_type line_type;
  union {
    void* line_ptr;
    mrb_irep_debug_info_line* line_flat_map;
    uint16_t* line_ary;
  };
} mrb_irep_debug_info_file;

typedef struct mrb_irep_debug_info {
  uint32_t pc_count;
  uint16_t flen;
  mrb_irep_debug_info_file** files;
} mrb_irep_debug_info;

struct mrb_irep;
struct mrb_state;

/*
 * get line from irep's debug info and program counter
 * @return returns NULL if not found
 */
char const* mrb_get_filename(struct mrb_irep* irep, uint32_t pc);

/*
 * get line from irep's debug info and program counter
 * @return returns -1 if not found
 */
int32_t mrb_get_line(struct mrb_irep* irep, uint32_t pc);

mrb_irep_debug_info_file* mrb_debug_info_append_file(
    struct mrb_state* mrb, struct mrb_irep* irep,
    uint32_t start_pos, uint32_t end_pos);
mrb_irep_debug_info* mrb_debug_info_alloc(struct mrb_state* mrb, struct mrb_irep* irep);
void mrb_debug_info_free(struct mrb_state* mrb, mrb_irep_debug_info* d);

#endif /* MRUBY_DEBUG_H */