git.scottworley.com Git - slidingtile/blob - sliding_tile_lib.h

   1 #ifndef _SLIDING_TILE_LIB_H
   2 #define _SLIDING_TILE_LIB_H
   3
   4 #include <istream>
   5 #include <memory>
   6 #include <ostream>
   7 #include <vector>
   8
   9 const int BOARD_DIM = 4;
  10 const int BOARD_SIZE = BOARD_DIM * BOARD_DIM;
  11
  12 struct InvertedBoard {
  13   signed char pos[BOARD_SIZE];
  14 };
  15
  16 struct Board {
  17   signed char board[BOARD_SIZE];
  18   bool is_valid() const;
  19   signed char hole() const;
  20   InvertedBoard invert() const;
  21   int distance(const Board& o) const;
  22   int distance(const InvertedBoard& invo) const;
  23   bool operator==(const Board& o) const;
  24   bool operator!=(const Board& o) const;
  25   bool operator<(const Board& o) const;
  26 };
  27 std::istream& operator>>(std::istream& is, Board& board);
  28 std::ostream& operator<<(std::ostream& os, const Board& board);
  29
  30 struct Step {
  31   Board board;
  32   std::shared_ptr<Step> prev;
  33   std::vector<Step*> successors(std::shared_ptr<Step> shared_this) const;
  34   static signed char adjacent[BOARD_SIZE][5];
  35 };
  36 std::ostream& operator<<(std::ostream& os, const Step& step);
  37
  38
  39 #endif /* _SLIDING_TILE_LIB_H */