src/variants/crazyhouse/validator.cpp

   1 /*
   2   Copyright (c) 2007 Paolo Capriotti <p.capriotti@gmail.com>
   3
   4   This program is free software; you can redistribute it and/or modify
   5   it under the terms of the GNU General Public License as published by
   6   the Free Software Foundation; either version 2 of the License, or
   7   (at your option) any later version.
   8 */
   9
  10 #include "validator.h"
  11
  12 #include <KDebug>
  13
  14 #include <core/board.h>
  15 #include <core/move.h>
  16 #include <core/poolcollection.h>
  17 #include <core/pool.h>
  18 #include <core/state.h>
  19
  20 #include "global.h"
  21
  22 namespace Crazyhouse {
  23
  24 Validator::Validator(IValidator* validator)
  25 : Delegators::Validator(validator) { }
  26
  27 Validator::~Validator() { }
  28
  29 bool Validator::pseudolegal(const IState* state, Move& move) const {
  30   // add drop information to move, if missing
  31   if (move.drop() == Piece() &&
  32       move.pool() && move.index() != -1) {
  33     move.setDrop(state->pools()->pool(move.pool())->get(move.index()));
  34   }
  35
  36   Piece dropped = move.drop();
  37   if (dropped == Piece()) {
  38     return m_validator->pseudolegal(state, move);
  39   }
  40   else {
  41     // dropping on a valid square
  42     if (!state->board()->valid(move.dst()))
  43       return false;
  44
  45     // cannot drop on occupied squares
  46     if (state->board()->get(move.dst()) != NULL &&
  47         *state->board()->get(move.dst()) != Piece())
  48       return false;
  49
  50     // cannot drop pawns in first or eighth rank
  51     if (dropped.type() == pawn &&
  52           (move.dst().y == state->rank(0, players[0]) ||
  53            move.dst().y == state->rank(state->board()->size().y - 1, players[0])))
  54       return false;
  55
  56     return true;
  57   }
  58 }
  59
  60 const IColor* Validator::mover(const IState* state, const Move& move) const {
  61   if (move.drop() != Piece())
  62     return move.drop().color();
  63   else
  64     return m_validator->mover(state, move);
  65 }
  66
  67 } // namespace Crazyhouse
  68
  69