From 6b1f6cf3b7685eed5fb9e24b18c479d842c4043c Mon Sep 17 00:00:00 2001
From: Hampus <hampus@hampusmat.com>
Date: Wed, 5 Jan 2022 21:35:35 +0100
Subject: feat: implement random start position

---
 src/mazerator.c | 42 ++++++++++++++++++++++++++++++------------
 1 file changed, 30 insertions(+), 12 deletions(-)

(limited to 'src')

diff --git a/src/mazerator.c b/src/mazerator.c
index 95c6fb6..8224fb9 100644
--- a/src/mazerator.c
+++ b/src/mazerator.c
@@ -51,8 +51,10 @@ int main(int argc, char *argv[])
 {
 	unsigned int maze_width = 40U;
 	unsigned int maze_height = 20U;
-	unsigned int start_x = 1U;
-	unsigned int start_y = 1U;
+
+	unsigned int *start_x = NULL;
+	unsigned int *start_y = NULL;
+
 	unsigned int *seed = NULL;
 
 	char *wall = "█";
@@ -79,14 +81,16 @@ int main(int argc, char *argv[])
 
 			break;
 		case 'x':
-			start_x = str_to_uint(optarg, &err);
+			start_x = malloc_s(sizeof(unsigned int *));
+			*start_x = str_to_uint(optarg, &err);
 
 			if (err != NULL)
 				optarg_error(arg, err);
 
 			break;
 		case 'y':
-			start_y = str_to_uint(optarg, &err);
+			start_y = malloc_s(sizeof(unsigned int *));
+			*start_y = str_to_uint(optarg, &err);
 
 			if (err != NULL)
 				optarg_error(arg, err);
@@ -97,7 +101,6 @@ int main(int argc, char *argv[])
 			break;
 		case 's':
 			seed = malloc_s(sizeof(unsigned int *));
-
 			*seed = str_to_uint(optarg, &err);
 
 			if (err != NULL)
@@ -110,9 +113,9 @@ int main(int argc, char *argv[])
 				   "  -w, --width WIDTH       The width of the maze (Default: 40)\n"
 				   "  -h, --heigth HEIGHT     The heigth of the maze (Default: 20)\n"
 				   "  -x, --start-x X         The x coordinate for the start position "
-				   "(Default: 1)\n"
+				   "(Default: random)\n"
 				   "  -y, --start-y Y         The y coordinate for the start position "
-				   "(Default: 1)\n"
+				   "(Default: random)\n"
 				   "  -W, --wall WALL         Single character used as maze walls "
 				   "(Default: '█')\n"
 				   "  -s, --seed SEED         The randomization seed used for maze "
@@ -122,12 +125,10 @@ int main(int argc, char *argv[])
 			exit(0);
 		case '?':
 			printf("\nTry '%s --help' for more information\n", argv[0]);
-			exit(1);
+			exit(EXIT_FAILURE);
 		}
 	}
 
-	validate_start_coords(start_x, start_y, maze_width, maze_height);
-
 	if (seed == NULL)
 	{
 		seed = malloc_s(sizeof(unsigned int *));
@@ -138,13 +139,30 @@ int main(int argc, char *argv[])
 
 	free(seed);
 
-	Position start_pos = position_create(start_x, start_y);
+	if (start_x == NULL)
+	{
+		start_x = malloc_s(sizeof(unsigned int *));
+		*start_x = rand() % maze_width;
+	}
+
+	if (start_y == NULL)
+	{
+		start_y = malloc_s(sizeof(unsigned int *));
+		*start_y = rand() % maze_height;
+	}
+
+	validate_start_coords(*start_x, *start_y, maze_width, maze_height);
+
+	Position start_pos = position_create(*start_x * 2U + 1U, *start_y * 2U + 1U);
 
-	Grid grid = grid_create(maze_width * 2 + 1, maze_width * 2 + 1, wall);
+	Grid grid = grid_create(maze_width * 2U + 1U, maze_height * 2U + 1U, wall);
 
 	grid_to_maze(grid, start_pos);
 
 	grid_print(grid);
 
 	grid_destroy(grid);
+
+	free(start_x);
+	free(start_y);
 }
-- 
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