src/move.cpp

   1 /* Copyright (C) 2007-2011 Vincent Ollivier
   2  *
   3  * Purple Haze is free software: you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation, either version 3 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * Purple Haze is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  15  */
  16
  17 #include <assert.h>
  18 #include <iostream>
  19
  20 #include "move.h"
  21 #include "piece.h"
  22
  23 PieceType Move::promotion_type() const
  24 {
  25     switch (type()) {
  26         case KNIGHT_PROMOTION:
  27         case KNIGHT_PROMOTION_CAPTURE:
  28             return KNIGHT;
  29         case BISHOP_PROMOTION:
  30         case BISHOP_PROMOTION_CAPTURE:
  31             return BISHOP;
  32         case ROOK_PROMOTION:
  33         case ROOK_PROMOTION_CAPTURE:
  34             return ROOK;
  35         case QUEEN_PROMOTION:
  36         case QUEEN_PROMOTION_CAPTURE:
  37             return QUEEN;
  38         default:
  39             return EMPTY;
  40     }
  41 }
  42
  43 PieceType Move::castle_side() const
  44 {
  45     switch (type()) {
  46         case KING_CASTLE: return KING;
  47         case QUEEN_CASTLE: return QUEEN;
  48         default: return EMPTY;
  49     }
  50 }
  51
  52 std::ostream& operator<<(std::ostream& out, const Move move)
  53 {
  54     return (out << move.to_string());
  55 }
  56
  57 std::string Move::to_string() const
  58 {
  59     if (is_null()) return "#";
  60     std::string res = "";
  61     res += static_cast<char>('a' + orig_file());
  62     res += static_cast<char>('1' + orig_rank());
  63     res += static_cast<char>('a' + dest_file());
  64     res += static_cast<char>('1' + dest_rank());
  65     if (is_promotion()) {
  66         res += Piece(BLACK, promotion_type()).to_string(); // Lower case
  67     }
  68     return res;
  69 }