+++ /dev/null
-/*
- * moves.h - Move generation and checking
- * $Id$
- *
- * Copyright 1991 by Digital Equipment Corporation, Maynard, Massachusetts.
- * Enhancements Copyright 1992-95 Free Software Foundation, Inc.
- *
- * The following terms apply to Digital Equipment Corporation's copyright
- * interest in XBoard:
- * ------------------------------------------------------------------------
- * All Rights Reserved
- *
- * Permission to use, copy, modify, and distribute this software and its
- * documentation for any purpose and without fee is hereby granted,
- * provided that the above copyright notice appear in all copies and that
- * both that copyright notice and this permission notice appear in
- * supporting documentation, and that the name of Digital not be
- * used in advertising or publicity pertaining to distribution of the
- * software without specific, written prior permission.
- *
- * DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
- * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
- * DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
- * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
- * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
- * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
- * SOFTWARE.
- * ------------------------------------------------------------------------
- *
- * The following terms apply to the enhanced version of XBoard distributed
- * by the Free Software Foundation:
- * ------------------------------------------------------------------------
- * This program 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 2 of the License, or
- * (at your option) any later version.
- *
- * This program 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, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- * ------------------------------------------------------------------------
- */
-
-extern ChessSquare PromoPiece P((ChessMove moveType));
-extern ChessMove PromoCharToMoveType P((int whiteOnMove, int promoChar));
-extern char PieceToChar P((ChessSquare p));
-extern ChessSquare CharToPiece P((int c));
-
-extern void CopyBoard P((Board to, Board from));
-extern int CompareBoards P((Board board1, Board board2));
-
-typedef void (*MoveCallback) P((Board board, int flags, ChessMove kind,
- int rf, int ff, int rt, int ft,
- VOIDSTAR closure));
-
-/* Values for flags arguments */
-#define F_WHITE_ON_MOVE 1
-#define F_WHITE_KCASTLE_OK 2
-#define F_WHITE_QCASTLE_OK 4
-#define F_BLACK_KCASTLE_OK 8
-#define F_BLACK_QCASTLE_OK 16
-#define F_ALL_CASTLE_OK (F_WHITE_KCASTLE_OK | F_WHITE_QCASTLE_OK | \
- F_BLACK_KCASTLE_OK | F_BLACK_QCASTLE_OK)
-#define F_IGNORE_CHECK 32
-#define F_KRIEGSPIEL_CAPTURE 64 /* pawns can try to capture invisible pieces */
-#define F_ATOMIC_CAPTURE 128 /* capturing piece explodes, destroying itself
- and all non-pawns on adjacent squares;
- destroying your own king is illegal */
-
-/* Special epfile values */
-#define EP_NONE -1
-#define EP_UNKNOWN -2
-
-/* Call callback once for each pseudo-legal move in the given
- position, except castling moves. A move is pseudo-legal if it is
- legal, or if it would be legal except that it leaves the king in
- check. In the arguments, epfile is EP_NONE if the previous move
- was not a double pawn push, or the file 0..7 if it was, or
- EP_UNKNOWN if we don't know and want to allow all e.p. captures.
- Promotion moves generated are to Queen only.
-*/
-extern void GenPseudoLegal P((Board board, int flags, int epfile,
- MoveCallback callback, VOIDSTAR closure));
-
-/* Like GenPseudoLegal, but include castling moves and (unless
- F_IGNORE_CHECK is set in the flags) omit moves that would leave the
- king in check. The CASTLE_OK flags are true if castling is not yet
- ruled out by a move of the king or rook. Return TRUE if the player
- on move is currently in check and F_IGNORE_CHECK is not set.
-*/
-extern int GenLegal P((Board board, int flags, int epfile,
- MoveCallback callback, VOIDSTAR closure));
-
-/* If the player on move were to move from (rf, ff) to (rt, ft), would
- he leave himself in check? Or if rf == -1, is the player on move
- in check now? enPassant must be TRUE if the indicated move is an
- e.p. capture. The possibility of castling out of a check along the
- back rank is not accounted for (i.e., we still return nonzero), as
- this is illegal anyway. Return value is the number of times the
- king is in check. */
-extern int CheckTest P((Board board, int flags,
- int rf, int ff, int rt, int ft, int enPassant));
-
-/* Is a move from (rf, ff) to (rt, ft) legal for the player whom the
- flags say is on move? Other arguments as in GenPseudoLegal.
- Returns the type of move made, taking promoChar into account. */
-extern ChessMove LegalityTest P((Board board, int flags, int epfile,
- int rf, int ff, int rt, int ft,
- int promoChar));
-
-#define MT_NONE 0
-#define MT_CHECK 1
-#define MT_CHECKMATE 2
-#define MT_STALEMATE 3
-
-/* Return MT_NONE, MT_CHECK, MT_CHECKMATE, or MT_STALEMATE */
-extern int MateTest P((Board board, int flags, int epfile));
-
-typedef struct {
- /* Input data */
- ChessSquare pieceIn; /* EmptySquare if unknown */
- int rfIn, ffIn, rtIn, ftIn; /* -1 if unknown */
- int promoCharIn; /* NULLCHAR if unknown */
- /* Output data for matched move */
- ChessMove kind;
- ChessSquare piece;
- int rf, ff, rt, ft;
- int promoChar; /* 'q' if a promotion and promoCharIn was NULLCHAR */
- int count; /* Number of possibilities found */
-} DisambiguateClosure;
-
-/* Disambiguate a partially-known move */
-void Disambiguate P((Board board, int flags, int epfile,
- DisambiguateClosure *closure));
-
-
-/* Convert coordinates to normal algebraic notation.
- promoChar must be NULLCHAR or '.' if not a promotion.
-*/
-ChessMove CoordsToAlgebraic P((Board board, int flags, int epfile,
- int rf, int ff, int rt, int ft,
- int promoChar, char out[MOVE_LEN]));
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