so_long/map_loader.c at main · Hamzah004/so_long · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   map_loader.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: hbani-at <hbani-at@student.42amman.com>    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2025/12/26 10:00:00 by hbani-at          #+#    #+#             */
/*   Updated: 2025/12/29 19:55:49 by hbani-at         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "get_next_line/get_next_line.h"
#include "libft/libft.h"
#include "so_long.h"

static t_error	validate_file_extension(const char *file)
{
	char	*extension;

	extension = ft_strchr(file, '.');
	if (!extension)
		return (ERROR_INVALID_EXTENSION);
	if (ft_strncmp(extension, ".ber", 4))
		return (ERROR_INVALID_EXTENSION);
	return (ERROR_SUCCESS);
}

static t_error	count_file_rows(int fd, int *row_count)
{
	char	*line;
	int		count;

	count = 0;
	line = get_next_line(fd);
	while (line != NULL)
	{
		count++;
		free(line);
		line = get_next_line(fd);
	}
	if (count == 0)
		return (ERROR_FILE_EMPTY);
	*row_count = count;
	return (ERROR_SUCCESS);
}

static t_error	read_map(int fd, t_game_info *game_info)
{
	char	*line;
	int		i;

	i = 0;
	line = get_next_line(fd);
	while (line != NULL)
	{
		if (i >= game_info->number_of_rows)
		{
			free(line);
			return (ERROR_INVALID_ARGS);
		}
		game_info->map[i] = line;
		i++;
		line = get_next_line(fd);
	}
	if (i != game_info->number_of_rows)
		return (ERROR_INVALID_MAP);
	game_info->map[i] = NULL;
	return (ERROR_SUCCESS);
}

static t_error	reopen_and_read_map(const char *map_file,
		t_game_info *game_info)
{
	int		fd;
	t_error	err;

	fd = open(map_file, O_RDONLY);
	if (fd < 0)
	{
		free_map(game_info->map);
		game_info->map = NULL;
		return (ERROR_FILE_NOT_FOUND);
	}
	err = read_map(fd, game_info);
	close(fd);
	if (err != ERROR_SUCCESS)
	{
		free_map(game_info->map);
		game_info->map = NULL;
		return (err);
	}
	game_info->number_of_columns = row_len(game_info->map[0]);
	return (ERROR_SUCCESS);
}

t_error	map_load(const char *map_file, t_game_info *game_info)
{
	int		fd;
	t_error	err;
	int		row_count;

	if (!map_file || !game_info)
		return (ERROR_INVALID_ARGS);
	err = validate_file_extension(map_file);
	if (err != ERROR_SUCCESS)
		return (err);
	fd = open(map_file, O_RDONLY);
	if (fd < 0)
		return (ERROR_FILE_NOT_FOUND);
	err = count_file_rows(fd, &row_count);
	if (err != ERROR_SUCCESS)
	{
		close(fd);
		return (err);
	}
	game_info->number_of_rows = row_count;
	close(fd);
	game_info->map = ft_calloc((game_info->number_of_rows + 1), sizeof(char *));
	if (!game_info->map)
		return (ERROR_MEMORY);
	return (reopen_and_read_map(map_file, game_info));
}