From fc074e311232e90d997aa4062c63225380190bd3 Mon Sep 17 00:00:00 2001
From: Dominik Kaiser
Date: Wed, 29 May 2024 16:34:17 +0200
Subject: Add map checking

---
 src/check_for_valid_path.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 src/check_for_valid_path.c

(limited to 'src/check_for_valid_path.c')

diff --git a/src/check_for_valid_path.c b/src/check_for_valid_path.c
new file mode 100644
index 0000000..b93dc74
--- /dev/null
+++ b/src/check_for_valid_path.c
@@ -0,0 +1,54 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   check_for_valid_path.c                             :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: dkaiser <dkaiser@student.42heilbronn.de    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/05/29 15:54:52 by dkaiser           #+#    #+#             */
+/*   Updated: 2024/05/29 16:32:26 by dkaiser          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft.h"
+#include "so_long.h"
+
+static void floodfill(char *tiles, t_ivector size, t_ivector pos);
+static int check_tiles(char *tiles, int size);
+
+int check_for_valid_path(t_tilemap *map)
+{
+    char *tiles;
+
+    tiles = malloc(map->grid_size.x * map->grid_size.y);
+    if (!tiles)
+        return (1); // TODO: Error
+    ft_strlcpy(tiles, map->tiles, map->grid_size.x * map->grid_size.y + 1);
+    floodfill(tiles, map->grid_size, map->player_start_tile);
+    return (check_tiles(tiles, map->grid_size.x * map->grid_size.y));
+}
+
+static void floodfill(char *tiles, t_ivector size, t_ivector pos)
+{
+    if (tiles[pos.y * size.x + pos.x] == WALL || tiles[pos.y * size.x + pos.x] == 'X')
+        return ;
+    tiles[pos.y * size.x + pos.x] = 'X';
+    floodfill(tiles, size, (t_ivector){pos.x - 1, pos.y});
+    floodfill(tiles, size, (t_ivector){pos.x + 1, pos.y});
+    floodfill(tiles, size, (t_ivector){pos.x, pos.y - 1});
+    floodfill(tiles, size, (t_ivector){pos.x, pos.y + 1});
+}
+
+static int check_tiles(char *tiles, int size)
+{
+    int i;
+
+    i = 0;
+    while (i < size)
+    {
+        if (tiles[i] != WALL && tiles[i] != 'X')
+            return (1);
+        i++;
+    }
+    return (0);
+}
-- 
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