```c
#ifndef MAP_INTERNAL_H
# define MAP_INTERNAL_H

# include <stdio.h>
# include <stdint.h>
# include "map.h"

# define MAP_INIT_CAP 16

int8_t
map_grow(t_map *map);

int8_t
write_header(FILE *f, const char *source, const char *target);

int8_t
write_ranges(FILE *f, t_map *map);

#endif
```