realloc(ptr, new_size)
{
	local block_ptr;
	local new_space;
	local i;

	new_space = galloc(new_size);
	if (new_space == NULL)
	{
		free(ptr);
		return (NULL);
	}
	if (ptr == NULL)
		return new_space;
	block_ptr = ptr - LOCATION_DATA;
	i = 0;
	loop
	{
		if (i == new_size | i == [block_ptr + LOCATION_SIZE])
			break;
		[new_space + i] = [ptr + i];
		i++;
	}
	free(ptr);
	return new_space;
}