Initial import of Glaurung 2.1

src/piece.h

@@ -0,0 +1,132 @@
+/*
+  Glaurung, a UCI chess playing engine.
+  Copyright (C) 2004-2008 Tord Romstad
+
+  Glaurung is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+  
+  Glaurung is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+  
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+
+#if !defined(PIECE_H_INCLUDED)
+#define PIECE_H_INCLUDED
+
+//// 
+//// Includes
+////
+
+#include "color.h"
+#include "misc.h"
+#include "square.h"
+
+
+//// 
+//// Types
+////
+
+enum PieceType {
+  NO_PIECE_TYPE = 0,
+  PAWN = 1, KNIGHT = 2, BISHOP = 3, ROOK = 4, QUEEN = 5, KING = 6
+};
+
+enum Piece {
+  NO_PIECE = 0, WP = 1, WN = 2, WB = 3, WR = 4, WQ = 5, WK = 6,
+  BP = 9, BN = 10, BB = 11, BR = 12, BQ = 13, BK = 14,
+  EMPTY = 16, OUTSIDE = 17
+};
+
+
+////
+//// Constants and variables
+////
+
+const PieceType PieceTypeMin = PAWN;
+const PieceType PieceTypeMax = KING;
+
+extern const int SlidingArray[18];
+extern const SquareDelta Directions[16][16];   
+extern const SquareDelta PawnPush[2];
+
+
+//// 
+//// Inline functions
+////
+
+inline Piece operator+ (Piece p, int i) { return Piece(int(p) + i); }
+inline void operator++ (Piece &p, int) { p = Piece(int(p) + 1); }
+inline Piece operator- (Piece p, int i) { return Piece(int(p) - i); }
+inline void operator-- (Piece &p, int) { p = Piece(int(p) - 1); }
+inline PieceType operator+ (PieceType p, int i) {return PieceType(int(p) + i);}
+inline void operator++ (PieceType &p, int) { p = PieceType(int(p) + 1); }
+inline PieceType operator- (PieceType p, int i) {return PieceType(int(p) - i);}
+inline void operator-- (PieceType &p, int) { p = PieceType(int(p) - 1); }
+
+inline PieceType type_of_piece(Piece p)  {
+  return PieceType(int(p) & 7);
+}
+
+inline Color color_of_piece(Piece p) {
+  return Color(int(p) >> 3);
+}
+
+inline Piece piece_of_color_and_type(Color c, PieceType pt) {
+  return Piece((int(c) << 3) | int(pt));
+}
+
+inline Piece pawn_of_color(Color c) {
+  return piece_of_color_and_type(c, PAWN);
+}
+
+inline Piece knight_of_color(Color c) {
+  return piece_of_color_and_type(c, KNIGHT);
+}
+
+inline Piece bishop_of_color(Color c) {
+  return piece_of_color_and_type(c, BISHOP);
+}
+
+inline Piece rook_of_color(Color c) {
+  return piece_of_color_and_type(c, ROOK);
+}
+
+inline Piece queen_of_color(Color c) {
+  return piece_of_color_and_type(c, QUEEN);
+}
+
+inline Piece king_of_color(Color c) {
+  return piece_of_color_and_type(c, KING);
+}
+
+inline int piece_is_slider(Piece p) {
+  return SlidingArray[int(p)];
+}
+
+inline int piece_type_is_slider(PieceType pt) {
+  return SlidingArray[int(pt)];
+}
+
+inline SquareDelta pawn_push(Color c) {
+  return PawnPush[c];
+}
+  
+
+////
+//// Prototypes
+////
+
+extern char piece_type_to_char(PieceType pt, bool upcase);
+extern PieceType piece_type_from_char(char c);
+extern bool piece_is_ok(Piece pc);
+extern bool piece_type_is_ok(PieceType pt);
+
+
+#endif // !defined(PIECE_H_INCLUDED)