c-md/srcs/map/core.c.md

core.c

Core functions of the map feature. Handles initialization, addition, freeing, and growing of the map structure.

---

Includes

#include <stdlib.h>

#include "map.h"
#include "internal/map_internal.h"

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Function Descriptions

map_init

Initializes the map structure. Every map structure must be initialized before use. They also must be freed with map_free when no longer needed.

Parameters

• map: Pointer to the map structure to initialize.

Implementation

void
map_init(t_map *map)
{
	map->ranges = NULL;
	map->count = 0;
	map->capacity = 0;
}

map_add

Adds a new range to the map structure.

Parameters

• map: Pointer to the map structure.
• src_start: Start of the source range.
• src_end: End of the source range.
• dst_start: Start of the destination range.
• dst_end: End of the destination range.

Implementation

void
map_add(t_map *map, uint32_t src_start, uint32_t src_end,
	uint32_t dst_start, uint32_t dst_end)
{
	t_range	*range;

	if (map->count >= map->capacity)
	{
		if (0 != map_grow(map))
			return ;
	}
	range = &map->ranges[map->count];
	range->src_start = src_start;
	range->src_end = src_end;
	range->dst_start = dst_start;
	range->dst_end = dst_end;
	map->count++;
}

map_free

Frees the resources allocated with the map structure.

Parameters

• map: Pointer to the map structure to free.

Implementation

void
map_free(t_map *map)
{
	free(map->ranges);
	map->ranges = NULL;
	map->count = 0;
	map->capacity = 0;
}

map_grow

Grows the capacity of the map structure. Multiplies the current capacity by 2, or sets it to an initial value if it's zero.

Parameters

• map: Pointer to the map structure to grow.

Return Value

Returns 0 on success, or 1 on memory allocation failure.

Implementation

int8_t
map_grow(t_map *map)
{
	size_t		new_cap;
	t_range		*new_ranges;

	new_cap = (0 == map->capacity) ? MAP_INIT_CAP : map->capacity * 2;
	new_ranges = realloc(map->ranges, new_cap * sizeof(t_range));
	if (NULL == new_ranges)
		return (1);
	map->ranges = new_ranges;
	map->capacity = new_cap;
	return (0);
}