editing_area/main.c: restructured panic exit

src/editing_area/main.c

@@ -24,6 +24,7 @@ int editing_area_main(int argc, char **argv,
 	int error;
 	struct Level level;
 	level.data = NULL;
+	Texture2D tileset;
 
 	/* initialize raylib */
 	InitWindow(editor_window_width, editor_window_height,
@@ -31,40 +32,41 @@ int editing_area_main(int argc, char **argv,
 	SetTargetFPS(editor_target_fps);
 	init_mouse();
 	/* load textures */
-	const Texture2D tileset = LoadTexture(argv[1]);
+	tileset = LoadTexture(argv[1]);
 
 	/* only proceed if tileset is large enough */
-	if (tileset.width >= TILESET_MIN_WIDTH_PX &&
-	    tileset.height >= TILESET_MIN_HEIGHT_PX) {
-		/* load level */
-		error = level_read(&level, argv[2]);
-		printf("%d\n", error);
-
-		while ((!WindowShouldClose()) && (error >= 0)) {
-			/* update */
-			update_mouse(&mouse_x, &mouse_y, level,
-			             shared_data);
-
-			/* draw */
-			BeginDrawing();
-
-			ClearBackground(BLACK);
-			level_draw(level, tileset);
-			editor_mouse_draw(mouse_x, mouse_y);
-
-			EndDrawing();
-		}
-
-		if (error >= 0) {
-			/* save level */
-			error = level_write(level, argv[2]);
-		}
-	} else
+	if (tileset.width < TILESET_MIN_WIDTH_PX ||
+	    tileset.height < TILESET_MIN_HEIGHT_PX) {
 		fprintf(stderr,
 		        "ERROR: tileset size is invalid, expected at "
 		        "least [%d ; %d], got [%d ; %d]\n",
 		        TILESET_MIN_WIDTH_PX, TILESET_MIN_HEIGHT_PX,
 		        tileset.width, tileset.height);
+		goto panic;
+	}
+
+	/* load level */
+	if (level_read(&level, argv[2]))
+		goto panic;
+
+	while (!WindowShouldClose()) {
+		/* update */
+		update_mouse(&mouse_x, &mouse_y, level, shared_data);
+
+		/* draw */
+		BeginDrawing();
+
+		ClearBackground(BLACK);
+		level_draw(level, tileset);
+		editor_mouse_draw(mouse_x, mouse_y);
+
+		EndDrawing();
+	}
+
+	/* save level */
+	level_write(level, argv[2]);
+
+panic:
 
 	/* deinit */
 	level_free(&level);