pieceOnBoard.h

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#ifndef OSL_PIECE_ON_BOARD_H
#define OSL_PIECE_ON_BOARD_H
#include "osl/numEffectState.h"
 
namespace osl
{
  namespace move_generator
  {
    enum PromoteType{
      NoPromoteType=0,
      CanPromoteType=1,
      CheckPromoteType=2,
      MustPromoteType=3,
    };

    template<class Action,bool noCapturePromote=false>
    struct PieceOnBoard
    {
      template<Player P>
      static void generatePieceUnsafe(const NumEffectState& state,Piece p, Square target, Piece p1,Action& action)
      {
        assert(state.hasEffectByPiece(p, target));
        Ptype ptype=p.ptype();
        Square from=p.square();
        if(canPromote(ptype)){
          if(target.canPromote<P>()){
            action.unknownMove(from,target,p1,promote(ptype),true,P);
            int y=(P==BLACK ? target.y() : 10-target.y());
            if(!Ptype_Table.isBetterToPromote(ptype) && 
               (((ptype==LANCE || ptype==PAWN) ? y==3 : true )) &&
               Ptype_Table.canDropTo(P,ptype,target))
              action.unknownMove(from,target,p1,ptype,false,P);
          }
          else if(from.canPromote<P>()){
            action.unknownMove(from,target,p1,promote(ptype),true,P);
            if(!Ptype_Table.isBetterToPromote(ptype))
              action.unknownMove(from,target,p1,ptype,false,P);
          }
          else
            action.unknownMove(from,target,p1,ptype,false,P);
        }
        else{
          action.unknownMove(from,target,p1,ptype,false,P);
        }
      }
      template<Player P>
      static void generatePiece(const NumEffectState& state,Piece p, Square target, Piece p1,Action& action)
      {
        if(p.ptype()==KING){
          // 王手がかかっているときには自分の影になっている手も生成してしまう
          const Player altP=alt(P);
//        assert(!state.hasEffectAt<altP>(p.square()));
          // 自殺手
          if(state.hasEffectAt<altP>(target)) return;
        }
        if(state.pinOrOpen(P).test(p.number())){
          Direction d=state.pinnedDir<P>(p);
          Direction d1=Board_Table.getShort8Unsafe<P>(p.square(),target);
          if(primDir(d)!=primDirUnsafe(d1)) return;
        }
        generatePieceUnsafe<P>(state,p,target,p1,action);
      }

      template<Player P,Ptype T>
      static void generatePiecePtypeUnsafe(const NumEffectState& state,Piece p, Square target, Piece p1,Action& action)
      {
        assert(state.hasEffectByPiece(p, target));
        assert(p.ptype()==T);
//      Ptype ptype=p.ptype();
        Square from=p.square();
        if(canPromote(T) & (target.canPromote<P>() || from.canPromote<P>())){
          action.unknownMove(from,target,p1,promote(T),true,P);
          if(((T==PAWN || T==LANCE) && 
              (P==BLACK ? target.y()==1 : target.y()==9))||
             (T==KNIGHT && (P==BLACK ? target.y()<=2 : target.y()>=8)))
            return;
          if((T==ROOK || T==BISHOP || T==PAWN ||
              (T==LANCE && (P==BLACK ? target.y()==2 : target.y()==8)))) 
            return;
        }
        action.unknownMove(from,target,p1,T,false,P);
      }
      template<Player P,Ptype T>
      static void generatePiecePtype(const NumEffectState& state,Piece p, Square target, Piece p1,Action& action)
      {
        if(T==KING){
          assert(!state.hasEffectAt(alt(P),p.square()));
          if(state.hasEffectAt(alt(P),target)) return;
        }
        else if(state.pin(P).test(p.number())){
          Direction d=state.pinnedDir<P>(p);
          Direction d1=Board_Table.getShort8Unsafe<P>(p.square(),target);
          if(primDir(d)!=primDirUnsafe(d1)) return;
        }
        generatePiecePtypeUnsafe<P,T>(state,p,target,p1,action);
      }

      template <Player P,Ptype T,bool useDirMask>
      static void generatePtype(const NumEffectState& state,Piece p, Action& action,int dirMask=0);
 
      template <Player P,Ptype T>
      static void generatePtype(const NumEffectState& state,Piece p, Action& action)
      {
        int dummy=0;
        generatePtype<P,T,false>(state,p,action,dummy);
      }

      template <Player P,Ptype T,bool useDirMask>
      static void generatePtypeUnsafe(const NumEffectState& state,Piece p, Action& action,int dirMask);
      template <Player P,Ptype T>
      static void generatePtypeUnsafe(const NumEffectState& state,Piece p, Action& action)
      {
        int dummy=0;
        generatePtypeUnsafe<P,T,false>(state,p,action,dummy);
      }

      template <Player P,bool useDirMask>
      static void generate(const NumEffectState& state,Piece p, Action& action,int dirMask=0);
    };
 
    struct GeneratePieceOnBoard
    {
      static void generate(Player turn, const NumEffectState& state, Piece target,
                           MoveVector&);
    };
  } // namespace move_generator
  using move_generator::GeneratePieceOnBoard;
} // namespace osl
 
#endif /* OSL_PIECE_ON_BOARD_H */
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