Add tilemap.c and read map size

1 files changed, 67 insertions, 0 deletions

diff --git a/src/tilemap.c b/src/tilemap.c
new file mode 100644
index 0000000..c0c0524
--- /dev/null
+++ b/src/tilemap.c
@@ -0,0 +1,67 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   tilemap.c                                          :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: dkaiser <dkaiser@student.42heilbronn.de    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/05/10 14:47:01 by dkaiser           #+#    #+#             */
+/*   Updated: 2024/05/10 15:51:50 by dkaiser          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "get_next_line.h"
+#include "so_long.h"
+
+static t_ivector	get_map_size_from_file(int fd);
+static int			get_line_len(char *line);
+
+int	load_map_from_file(t_tilemap *tilemap, char *filename)
+{
+	int	fd;
+
+	fd = open(filename, O_RDONLY);
+	if (fd < 0)
+		return (1);
+	tilemap->grid_size = get_map_size_from_file(fd);
+	close(fd);
+	if (tilemap->grid_size.x < 0 || tilemap->grid_size.y < 0)
+		return (1);
+	return (0);
+}
+
+static t_ivector	get_map_size_from_file(int fd)
+{
+	t_ivector	result;
+	char		*next_line;
+
+	result.x = 0;
+	result.y = 0;
+	next_line = get_next_line(fd);
+	while (next_line)
+	{
+		if (!result.x)
+			result.x = get_line_len(next_line);
+		else if (result.x != get_line_len(next_line))
+		{
+			free(next_line);
+			result.x = -1;
+			result.y = -1;
+			return (result);
+		}
+		result.y++;
+		free(next_line);
+		next_line = get_next_line(fd);
+	}
+	return (result);
+}
+
+static int	get_line_len(char *line)
+{
+	int	len;
+
+	len = 0;
+	while (line[len] && line[len] != '\n')
+		len++;
+	return (len);
+}