Prevented random memory corruption and other cleanup

[ttt] / src / ttt-board.c

diff --git a/src/ttt-board.c b/src/ttt-board.c
index 273702185d8695ab312ef68275fcd4fecdcd3d1f..d231ea943ad52d4ddb252c1debe773ea4e79b40a 100644 (file)
--- a/src/ttt-board.c
+++ b/src/ttt-board.c
@@ -94,15 +94,20 @@ ttt_board_write (ttt_board_t *board, FILE *file)
  *  3|4|5
  *  6|7|8
  *
- * Returns: TTT_ERROR_NONE if a move is made succesfully. TTT_ERROR_NOT_VALID_MOVE
- * if a move is invalid (the given cell is not empty).
+ * Returns: TTT_ERROR_NONE if a move is made
+ * succesfully. TTT_ERROR_NOT_VALID_MOVE if a move is invalid (the
+ * given cell is not empty). TTT_ERROR_NOT_GRID if the move is
+ * impossible (user input 'a' or '9' etc.)
  */
 
 ttt_error_t ttt_board_make_move (ttt_board_t *board, int move)
 {  
+    if (move < 0 || move > 8)
+       return TTT_ERROR_NOT_GRID;
+    
     if (board->cells[move] != TTT_CELL_EMPTY)
        return TTT_ERROR_NOT_VALID_MOVE;
-
+    
     board->cells[move] = board->current_player;
     
     if (board->current_player == TTT_CELL_X)