%{
/*
* parser.l -- lex parser of algebraic chess moves for XBoard
- * $Id$
*
- * Copyright 1991 by Digital Equipment Corporation, Maynard, Massachusetts.
- * Enhancements Copyright 1992-95 Free Software Foundation, Inc.
+ * Copyright 1991 by Digital Equipment Corporation, Maynard,
+ * Massachusetts.
+ *
+ * Enhancements Copyright 1992-2001, 2002, 2003, 2004, 2005,
+ * 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
*
* The following terms apply to Digital Equipment Corporation's copyright
* interest in XBoard:
* SOFTWARE.
* ------------------------------------------------------------------------
*
- * The following terms apply to the enhanced version of XBoard distributed
- * by the Free Software Foundation:
+ * 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
+ *
+ * GNU XBoard 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.
+ * the Free Software Foundation, either version 3 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.
+ * GNU XBoard 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.
- * ------------------------------------------------------------------------
- */
+ * along with this program. If not, see http://www.gnu.org/licenses/.
+ *
+ *------------------------------------------------------------------------
+ ** See the file ChangeLog for a revision history. */
/* This parser handles all forms of promotion.
* The parser resolves ambiguous moves by searching and check-testing.
* It also parses comments of the form [anything] or (anything).
+ *
+ * [HGM] Parser extensively modified for bigger boards, Shogi-like syntax,
+ * and unknow pieces. All pieces are now mandatory upper case, but can be
+ * any letter A-Z. Files must be lower case (as before), but can run upto 'l'.
+ * Ranks can be 0-9. The parser returns 0 for off-board files and ranks.
+ * For an unknown piece (as mover or promotion piece) it returns
+ * IllegalMove, like it does when the piece doesn't match.
+ * Promotions can now also be appended Shogi-style, a bare '=' or '+',
+ * and this is then returned as promotion character. The piece indicator
+ * can be prefixed by a '+' to indicate it is a promoted piece.
*/
#include "config.h"
#ifdef FLEX_SCANNER
/* This is flex */
-/* use prototypes in function declarations */
+/* [AP] use prototypes in function declarations */
#define YY_USE_PROTOS
#ifdef YY_USE_PROTOS
#else
#define YY_PROTO(proto) ()
#endif
+/* end of [AP] fix */
#undef YY_INPUT
#define YY_INPUT(buf, result, max_size) my_yy_input(buf, &result, max_size)
%}
%%
-[RrBbNnQqKkPp][/]?[a-h][1-8][xX:-]?[a-h][1-8](=?\(?[RrBbNnQqKk]\)?)? {
+"+"?[A-Z][/]?[a-l][0-9][xX:-]?[a-l][0-9]((=?\(?[A-Z]\)?)|[=+])? {
/*
* Fully-qualified algebraic move, possibly with promotion
*/
- int skip1 = 0, skip2 = 0;
+ int skip1 = 0, skip2 = 0, skip3 = 0, promoted = 0;
ChessSquare piece;
ChessMove result;
+ char c;
if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
+ if (yytext[0] == '+') skip1 = skip3 = promoted = 1; /* [HGM] Shogi promoted */
+
/* remove the / */
- if (yytext[1] == '/') skip1 = 1;
+ if (yytext[1+skip1] == '/') skip1++;
/* remove the [xX:-] */
if ((yytext[3+skip1] == 'x') || (yytext[3+skip1] == 'X') ||
- (yytext[3+skip1] == '-') || (yytext[3+skip1] == ':')) skip2 = 1;
+ (yytext[3+skip1] == '-') || (yytext[3+skip1] == ':')) skip2 = 1;
currentMoveString[0] = yytext[1+skip1];
currentMoveString[1] = yytext[2+skip1];
currentMoveString[3] = yytext[4+skip1+skip2];
currentMoveString[4] = NULLCHAR;
- if (yyleng-skip1-skip2 > 5) {
- if (yytext[yyleng-1] == ')') {
- currentMoveString[4] = ToLower(yytext[yyleng-2]);
+ if (appData.debugMode) {
+ fprintf(debugFP, "Parser Qa1b2: yyleng=%d\n",
+ yyleng);
+ }
+
+ if (yyleng-skip1-skip2 > 5) { char c;
+ if (yytext[yyleng-1] == ')') {
+ c = currentMoveString[4] = ToLower(yytext[yyleng-2]);
} else {
- currentMoveString[4] = ToLower(yytext[yyleng-1]);
+ c = currentMoveString[4] = ToLower(yytext[yyleng-1]);
}
+ if(c == '+' && gameInfo.variant != VariantShogi) c = currentMoveString[4] = NULLCHAR; // + means check outside Shogi
currentMoveString[5] = NULLCHAR;
}
+ if (appData.debugMode) {
+ fprintf(debugFP, "parser: %s\n", currentMoveString);
+ }
+ /* [HGM] do not allow values beyond board size */
+ if(currentMoveString[1] - ONE >= BOARD_HEIGHT ||
+ currentMoveString[1] - ONE < 0 ||
+ currentMoveString[0] - AAA >= BOARD_RGHT ||
+ currentMoveString[3] - ONE >= BOARD_HEIGHT ||
+ currentMoveString[3] - ONE < 0 ||
+ currentMoveString[2] - AAA >= BOARD_RGHT ||
+ currentMoveString[0] - AAA < BOARD_LEFT ||
+ currentMoveString[2] - AAA < BOARD_LEFT )
+ return ImpossibleMove;
+
piece = boards[yyboardindex]
- [currentMoveString[1] - '1'][currentMoveString[0] - 'a'];
- if (ToLower(yytext[0]) != ToLower(PieceToChar(piece)))
+ [currentMoveString[1] - ONE][currentMoveString[0] - AAA];
+ if(PieceToChar(piece) == '+' && appData.icsActive) promoted = 1, yytext[skip3] = PieceToChar(DEMOTED piece); // trust ICS
+ if(promoted) piece = (ChessSquare) (DEMOTED piece);
+ c = PieceToChar(piece);
+ if(c == '~') c = PieceToChar((ChessSquare) (DEMOTED piece));
+ if (ToLower(yytext[skip3]) != ToLower(c))
return (int) IllegalMove;
result = LegalityTest(boards[yyboardindex],
- PosFlags(yyboardindex), EP_UNKNOWN,
- currentMoveString[1] - '1',
- currentMoveString[0] - 'a',
- currentMoveString[3] - '1',
- currentMoveString[2] - 'a',
+ PosFlags(yyboardindex)&~F_MANDATORY_CAPTURE, // [HGM] losers: might think we can e.p.!
+ currentMoveString[1] - ONE,
+ currentMoveString[0] - AAA,
+ currentMoveString[3] - ONE,
+ currentMoveString[2] - AAA,
currentMoveString[4]);
- if (currentMoveString[4] == NULLCHAR &&
- (result == WhitePromotionQueen || result == BlackPromotionQueen)) {
- currentMoveString[4] = 'q';
- currentMoveString[5] = NULLCHAR;
+ if (currentMoveString[4] == NULLCHAR) {
+ if(result == WhitePromotion || result == BlackPromotion) {
+ if(gameInfo.variant == VariantCourier || gameInfo.variant == VariantShatranj)
+ currentMoveString[4] = PieceToChar(BlackFerz);
+ else if(gameInfo.variant == VariantGreat)
+ currentMoveString[4] = PieceToChar(BlackMan);
+ else if(gameInfo.variant == VariantShogi)
+ currentMoveString[4] = '+';
+ else
+ currentMoveString[4] = PieceToChar(BlackQueen);
+ } else if(result == WhiteNonPromotion || result == BlackNonPromotion)
+ currentMoveString[4] = '=';
+ currentMoveString[5] = NULLCHAR;
}
return (int) result;
}
-[a-h][1-8][xX:-]?[a-h][1-8](=?\(?[RrBbNnQqKk]\)?)? {
+[a-l][0-9][xX:-]?[a-l][0-9]((=?\(?[A-Za-z]\)?)|[=+])? {
/*
* Simple algebraic move, possibly with promotion
+ * [HGM] Engine moves are received in this format, with lower-case promoChar!
*/
int skip = 0;
ChessMove result;
currentMoveString[3] = yytext[3+skip];
currentMoveString[4] = NULLCHAR;
- if (yyleng-skip > 4) {
+ if (yyleng-skip > 4) { char c;
if (yytext[yyleng-1] == ')') {
- currentMoveString[4] = ToLower(yytext[yyleng-2]);
+ c = currentMoveString[4] = ToLower(yytext[yyleng-2]);
} else {
- currentMoveString[4] = ToLower(yytext[yyleng-1]);
+ c = currentMoveString[4] = ToLower(yytext[yyleng-1]);
}
+ if(c == '+' && gameInfo.variant != VariantShogi) c = currentMoveString[4] = NULLCHAR; // + means check outside Shogi
currentMoveString[5] = NULLCHAR;
}
+ /* [HGM] do not allow values beyond board size */
+ if(currentMoveString[1] - ONE >= BOARD_HEIGHT ||
+ currentMoveString[1] - ONE < 0 ||
+ currentMoveString[0] - AAA >= BOARD_RGHT ||
+ currentMoveString[3] - ONE >= BOARD_HEIGHT ||
+ currentMoveString[3] - ONE < 0 ||
+ currentMoveString[2] - AAA >= BOARD_RGHT ||
+ currentMoveString[0] - AAA < BOARD_LEFT ||
+ currentMoveString[2] - AAA < BOARD_LEFT )
+ return ImpossibleMove;
+
result = LegalityTest(boards[yyboardindex],
- PosFlags(yyboardindex), EP_UNKNOWN,
- currentMoveString[1] - '1',
- currentMoveString[0] - 'a',
- currentMoveString[3] - '1',
- currentMoveString[2] - 'a',
+ PosFlags(yyboardindex)&~F_MANDATORY_CAPTURE, // [HGM] losers: might think we can e.p.!
+ currentMoveString[1] - ONE,
+ currentMoveString[0] - AAA,
+ currentMoveString[3] - ONE,
+ currentMoveString[2] - AAA,
currentMoveString[4]);
- if (currentMoveString[4] == NULLCHAR &&
- (result == WhitePromotionQueen || result == BlackPromotionQueen)) {
- currentMoveString[4] = 'q';
- currentMoveString[5] = NULLCHAR;
- }
+ if (currentMoveString[4] == NULLCHAR) {
+ if(result == WhitePromotion || result == BlackPromotion) {
+ if(gameInfo.variant == VariantShatranj || gameInfo.variant == VariantCourier || gameInfo.variant == VariantMakruk)
+ currentMoveString[4] = PieceToChar(BlackFerz);
+ else if(gameInfo.variant == VariantGreat)
+ currentMoveString[4] = PieceToChar(BlackMan);
+ else if(gameInfo.variant == VariantShogi)
+ currentMoveString[4] = '+'; // Queen might not be defined in mini variants!
+ else
+ currentMoveString[4] = PieceToChar(BlackQueen);
+ } else if(result == WhiteNonPromotion || result == BlackNonPromotion)
+ currentMoveString[4] = '=';
+ currentMoveString[5] = NULLCHAR;
+ } else if(appData.testLegality && // strip off unnecessary and false promo characters
+ !(result == WhitePromotion || result == BlackPromotion ||
+ result == WhiteNonPromotion || result == BlackNonPromotion)) currentMoveString[4] = NULLCHAR;
+
+ return (int) result;
+}
+
+[A-L][0-9][xX:-]?[A-L][0-9] {
+ /*
+ * Simple algebraic move, in capitals
+ * [HGM] Some Xiangqi engines use this format ('ICCS notation'). So no promotions!
+ */
+ int skip = 0;
+ ChessMove result;
+
+ if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
+
+ /* remove the [xX:-] */
+ if ((yytext[2] == 'x') || (yytext[2] == 'X') ||
+ (yytext[2] == '-') || (yytext[2] == ':')) skip = 1;
+
+ currentMoveString[0] = yytext[0]+32;
+ currentMoveString[1] = yytext[1];
+ currentMoveString[2] = yytext[2+skip]+32;
+ currentMoveString[3] = yytext[3+skip];
+ currentMoveString[4] = NULLCHAR;
+
+ /* [HGM] do not allow values beyond board size */
+ if(currentMoveString[1] - ONE >= BOARD_HEIGHT ||
+ currentMoveString[1] - ONE < 0 ||
+ currentMoveString[0] - AAA >= BOARD_RGHT ||
+ currentMoveString[3] - ONE >= BOARD_HEIGHT ||
+ currentMoveString[3] - ONE < 0 ||
+ currentMoveString[2] - AAA >= BOARD_RGHT ||
+ currentMoveString[0] - AAA < BOARD_LEFT ||
+ currentMoveString[2] - AAA < BOARD_LEFT )
+ return ImpossibleMove;
+
+ result = LegalityTest(boards[yyboardindex],
+ PosFlags(yyboardindex)&~F_MANDATORY_CAPTURE, // [HGM] losers: might think we can e.p.!
+ currentMoveString[1] - ONE,
+ currentMoveString[0] - AAA,
+ currentMoveString[3] - ONE,
+ currentMoveString[2] - AAA,
+ currentMoveString[4]);
return (int) result;
}
-[a-h][1-8](=?\(?[RrBbNnQqKk]\)?)? {
+[a-l][0-9]((=?\(?[A-Za-z]\)?)|[=+])? {
/*
* Pawn move, possibly with promotion
*/
DisambiguateClosure cl;
- int skip = 0;
+ int skip = 0; char c;
if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
/* remove the =() */
- if (yytext[2] == '=') skip++;
+ if (yytext[2] == '=' && yytext[3] != NULLCHAR) skip++;
if (yytext[2+skip] == '(') skip++;
cl.pieceIn = WhiteOnMove(yyboardindex) ? WhitePawn : BlackPawn;
cl.rfIn = -1;
- cl.ffIn = yytext[0] - 'a';
- cl.rtIn = yytext[1] - '1';
- cl.ftIn = yytext[0] - 'a';
- cl.promoCharIn = yytext[2+skip];
- Disambiguate(boards[yyboardindex],
- PosFlags(yyboardindex), EP_UNKNOWN, &cl);
-
- currentMoveString[0] = cl.ff + 'a';
- currentMoveString[1] = cl.rf + '1';
- currentMoveString[2] = cl.ft + 'a';
- currentMoveString[3] = cl.rt + '1';
+ cl.ffIn = yytext[0] - AAA;
+ cl.rtIn = yytext[1] - ONE;
+ cl.ftIn = yytext[0] - AAA;
+ cl.promoCharIn = ToLower(yytext[2+skip]);
+ if(cl.promoCharIn == '+' && gameInfo.variant != VariantShogi) cl.promoCharIn = NULLCHAR; // + means check outside Shogi
+
+ /* [HGM] do not allow values beyond board size */
+ if(cl.rtIn >= BOARD_HEIGHT ||
+ cl.rtIn < 0 ||
+ cl.ffIn >= BOARD_RGHT ||
+ cl.ftIn < BOARD_LEFT )
+ return ImpossibleMove;
+
+ Disambiguate(boards[yyboardindex], PosFlags(yyboardindex), &cl);
+
+ currentMoveString[0] = cl.ff + AAA;
+ currentMoveString[1] = cl.rf + ONE;
+ currentMoveString[2] = cl.ft + AAA;
+ currentMoveString[3] = cl.rt + ONE;
currentMoveString[4] = cl.promoChar;
currentMoveString[5] = NULLCHAR;
}
-(ab|bc|cd|de|ef|fg|gh|hg|gf|fe|ed|dc|cb|ba|([a-h][xX:-][a-h]))(=?\(?[RrBbNnQqKk]\)?)?(ep|"e.p.")? {
+(ab|bc|cd|de|ef|fg|gh|hi|ij|jk|kl|lk|kj|ji|ih|hg|gf|fe|ed|dc|cb|ba|aa|bb|cc|dd|ee|ff|gg|hh|ii|jj|kk|ll|([a-l][xX:-][a-l]))((=?\(?[A-Z]\)?)|ep|"e.p."|=)? {
/*
* Pawn capture, possibly with promotion, possibly ambiguous
*/
DisambiguateClosure cl;
- int skip1 = 0, skip2 = 0;
+ int skip1 = 0, skip2 = 0; char c;
if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
/* remove the [xX:-] and =() */
if ((yytext[1] == 'x') || (yytext[1] == 'X')
|| (yytext[1] == ':') || (yytext[1] == '-')) skip1 = 1;
- if (yytext[2+skip1] == '=') skip2++;
+ if (yytext[2+skip1] == '=' && yytext[3+skip1] != NULLCHAR) skip2++;
if (yytext[2+skip1+skip2] == '(') skip2++;
cl.pieceIn = WhiteOnMove(yyboardindex) ? WhitePawn : BlackPawn;
cl.rfIn = -1;
- cl.ffIn = yytext[0] - 'a';
+ cl.ffIn = yytext[0] - AAA;
cl.rtIn = -1;
- cl.ftIn = yytext[1+skip1] - 'a';
+ cl.ftIn = yytext[1+skip1] - AAA;
cl.promoCharIn = yytext[2+skip1+skip2];
- Disambiguate(boards[yyboardindex],
- PosFlags(yyboardindex), EP_UNKNOWN, &cl);
+ if(cl.promoCharIn == '+' && gameInfo.variant != VariantShogi) cl.promoCharIn = NULLCHAR; // + means check outside Shogi
+
+ /* [HGM] do not allow values beyond board size */
+ if(cl.ffIn >= BOARD_RGHT ||
+ cl.ffIn < BOARD_LEFT ||
+ cl.ftIn >= BOARD_RGHT ||
+ cl.ftIn < BOARD_LEFT )
+ return ImpossibleMove;
- currentMoveString[0] = cl.ff + 'a';
- currentMoveString[1] = cl.rf + '1';
- currentMoveString[2] = cl.ft + 'a';
- currentMoveString[3] = cl.rt + '1';
+ Disambiguate(boards[yyboardindex], PosFlags(yyboardindex), &cl);
+
+ currentMoveString[0] = cl.ff + AAA;
+ currentMoveString[1] = cl.rf + ONE;
+ currentMoveString[2] = cl.ft + AAA;
+ currentMoveString[3] = cl.rt + ONE;
currentMoveString[4] = cl.promoChar;
currentMoveString[5] = NULLCHAR;
return (int) cl.kind;
}
-[a-h][xX:]?[a-h][1-8](=?\(?[RrBbNnQqKk]\)?)?(ep|"e.p.")? {
+[a-l][xX:]?[a-l][0-9]((=?\(?[A-Z]\)?)|ep|"e.p."|[=+])? {
/*
* unambiguously abbreviated Pawn capture, possibly with promotion
*/
int skip = 0;
- ChessMove result;
+ ChessMove result; char c;
if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
currentMoveString[0] = yytext[0];
currentMoveString[2] = yytext[1+skip];
currentMoveString[3] = yytext[2+skip];
+
+ /* [HGM] do not allow values beyond board size */
+ if(currentMoveString[0] - AAA >= BOARD_RGHT ||
+ currentMoveString[3] - ONE >= BOARD_HEIGHT ||
+ currentMoveString[3] - ONE < 0 ||
+ currentMoveString[2] - AAA >= BOARD_RGHT ||
+ currentMoveString[0] - AAA < BOARD_LEFT ||
+ currentMoveString[2] - AAA < BOARD_LEFT )
+ return ImpossibleMove;
+
+ if (gameInfo.variant == VariantXiangqi && /* [HGM] In Xiangqi rank stays same */
+ currentMoveString[0] != currentMoveString[2] ) {
+ currentMoveString[1] = yytext[2+skip];
+ } else
if (WhiteOnMove(yyboardindex)) {
- if (yytext[2+skip] == '1') return (int) ImpossibleMove;
+ if (yytext[2+skip] == ONE) return (int) ImpossibleMove;
currentMoveString[1] = yytext[2+skip] - 1;
+ if(boards[yyboardindex][currentMoveString[1]-ONE][currentMoveString[0]-AAA] != WhitePawn)
+ return ImpossibleMove;
} else {
- if (yytext[2+skip] == '8') return (int) ImpossibleMove;
- currentMoveString[1] = yytext[2+skip] + 1;
+ currentMoveString[1] = currentMoveString[3] + 1;
+ if (currentMoveString[3] == ONE+BOARD_HEIGHT-1) return (int) ImpossibleMove;
+ if(boards[yyboardindex][currentMoveString[1]-ONE][currentMoveString[0]-AAA] != BlackPawn)
+ return ImpossibleMove;
}
if (yyleng-skip > 3) {
if (yytext[yyleng-1] == ')')
- currentMoveString[4] = ToLower(yytext[yyleng-2]);
+ c = currentMoveString[4] = ToLower(yytext[yyleng-2]);
else
- currentMoveString[4] = ToLower(yytext[yyleng-1]);
+ c = currentMoveString[4] = ToLower(yytext[yyleng-1]);
currentMoveString[5] = NULLCHAR;
+ if(c == '+' && gameInfo.variant != VariantShogi) c = currentMoveString[4] = NULLCHAR; // + means check outside Shogi
} else {
currentMoveString[4] = NULLCHAR;
}
result = LegalityTest(boards[yyboardindex],
- PosFlags(yyboardindex), EP_UNKNOWN,
- currentMoveString[1] - '1',
- currentMoveString[0] - 'a',
- currentMoveString[3] - '1',
- currentMoveString[2] - 'a',
+ PosFlags(yyboardindex)&~F_MANDATORY_CAPTURE, // [HGM] losers: might think we can e.p.!
+ currentMoveString[1] - ONE,
+ currentMoveString[0] - AAA,
+ currentMoveString[3] - ONE,
+ currentMoveString[2] - AAA,
currentMoveString[4]);
- if (currentMoveString[4] == NULLCHAR &&
- (result == WhitePromotionQueen || result == BlackPromotionQueen)) {
- currentMoveString[4] = 'q';
- currentMoveString[5] = NULLCHAR;
+ if (currentMoveString[4] == NULLCHAR) {
+ if(result == WhitePromotion || result == BlackPromotion) {
+ currentMoveString[4] = PieceToChar(BlackQueen);
+ // [HGM] shatranj: take care of variants without Queen
+ if(gameInfo.variant == VariantShatranj || gameInfo.variant == VariantCourier || gameInfo.variant == VariantMakruk)
+ currentMoveString[4] = PieceToChar(BlackFerz);
+ if(gameInfo.variant == VariantGreat)
+ currentMoveString[4] = PieceToChar(BlackMan);
+ if(gameInfo.variant == VariantShogi)
+ currentMoveString[4] = '+';
+ } else if(result == WhiteNonPromotion || result == BlackNonPromotion)
+ currentMoveString[4] = '=';
+ currentMoveString[5] = NULLCHAR;
}
if (result != IllegalMove) return (int) result;
}
result = LegalityTest(boards[yyboardindex],
- PosFlags(yyboardindex), EP_UNKNOWN,
- currentMoveString[1] - '1',
- currentMoveString[0] - 'a',
- currentMoveString[3] - '1',
- currentMoveString[2] - 'a',
+ PosFlags(yyboardindex)&~F_MANDATORY_CAPTURE, // [HGM] losers: might think we can e.p.!
+ currentMoveString[1] - ONE,
+ currentMoveString[0] - AAA,
+ currentMoveString[3] - ONE,
+ currentMoveString[2] - AAA,
currentMoveString[4]);
if (result == WhiteCapturesEnPassant || result == BlackCapturesEnPassant)
return (int) IllegalMove;
}
-[RrBbNnQqKk][xX:-]?[a-h][1-8] {
+"+"?[A-Z][xX:-]?[a-l][0-9]((=?\(?[A-Z]\)?)|[=+])? {
/*
* piece move, possibly ambiguous
*/
DisambiguateClosure cl;
- int skip = 0;
+ int skip = 0, skip2 = 0, promoted = 0;
if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
+ if(yytext[0] == '+') promoted = skip = skip2 = 1;
+
/* remove the [xX:-] */
- if ((yytext[1] == 'x') || (yytext[1] == 'X')
- || (yytext[1] == ':') || (yytext[1] == '-')) skip = 1;
+ if ((yytext[1+skip] == 'x') || (yytext[1+skip] == 'X')
+ || (yytext[1+skip] == ':') || (yytext[1+skip] == '-')) skip++;
if (WhiteOnMove(yyboardindex)) {
- cl.pieceIn = CharToPiece(ToUpper(yytext[0]));
+ cl.pieceIn = CharToPiece(ToUpper(yytext[skip2]));
} else {
- cl.pieceIn = CharToPiece(ToLower(yytext[0]));
+ cl.pieceIn = CharToPiece(ToLower(yytext[skip2]));
}
+ if(promoted) cl.pieceIn = (ChessSquare) (PROMOTED cl.pieceIn);
+
cl.rfIn = -1;
cl.ffIn = -1;
- cl.rtIn = yytext[2+skip] - '1';
- cl.ftIn = yytext[1+skip] - 'a';
+ cl.rtIn = yytext[2+skip] - ONE;
+ cl.ftIn = yytext[1+skip] - AAA;
cl.promoCharIn = NULLCHAR;
- Disambiguate(boards[yyboardindex],
- PosFlags(yyboardindex), EP_UNKNOWN, &cl);
- currentMoveString[0] = cl.ff + 'a';
- currentMoveString[1] = cl.rf + '1';
- currentMoveString[2] = cl.ft + 'a';
- currentMoveString[3] = cl.rt + '1';
+ if(yyleng-skip > 3 && gameInfo.variant == VariantShogi) /* [HGM] can have Shogi-style promotion */
+ cl.promoCharIn = yytext[yyleng-1-(yytext[yyleng-1]==')')];
+ if(cl.promoCharIn == '+' && gameInfo.variant != VariantShogi) cl.promoCharIn = NULLCHAR; // + means check outside Shogi
+
+ if (appData.debugMode) {
+ fprintf(debugFP, "Parser Qa1: yyleng=%d, %d(%d,%d)-(%d,%d) = %d (%c)\n",
+ yyleng,
+ cl.pieceIn,cl.ffIn,cl.rfIn,cl.ftIn,cl.rtIn,cl.promoCharIn,cl.promoCharIn?cl.promoCharIn:' ');
+ }
+
+ /* [HGM] but do not allow values beyond board size */
+ if(cl.rtIn >= BOARD_HEIGHT ||
+ cl.rtIn < 0 ||
+ cl.ftIn >= BOARD_RGHT ||
+ cl.ftIn < BOARD_LEFT )
+ return ImpossibleMove;
+
+ Disambiguate(boards[yyboardindex], PosFlags(yyboardindex), &cl);
+
+ currentMoveString[0] = cl.ff + AAA;
+ currentMoveString[1] = cl.rf + ONE;
+ currentMoveString[2] = cl.ft + AAA;
+ currentMoveString[3] = cl.rt + ONE;
currentMoveString[4] = cl.promoChar;
currentMoveString[5] = NULLCHAR;
return (int) cl.kind;
}
-[RrBbNnQqKk][a-h1-8][xX:-]?[a-h][1-8] {
+"+"?[A-Z][a-l0-9][xX:-]?[a-l][0-9]((=?\(?[A-Z]\)?)|[=+])? {
/*
* piece move with rank or file disambiguator
*/
DisambiguateClosure cl;
- int skip = 0;
+ int skip = 0, skip2 = 0; int promoted=0;
if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
+ if(yytext[0]=='+') promoted = skip = skip2 = 1;
+
/* remove the [xX:-] */
- if ((yytext[2] == 'x') || (yytext[2] == 'X')
- || (yytext[2] == ':') || (yytext[2] == '-')) skip = 1;
+ if ((yytext[2+skip] == 'x') || (yytext[2+skip] == 'X')
+ || (yytext[2+skip] == ':') || (yytext[2+skip] == '-')) skip++;
if (WhiteOnMove(yyboardindex)) {
- cl.pieceIn = CharToPiece(ToUpper(yytext[0]));
+ cl.pieceIn = CharToPiece(ToUpper(yytext[skip2]));
} else {
- cl.pieceIn = CharToPiece(ToLower(yytext[0]));
+ cl.pieceIn = CharToPiece(ToLower(yytext[skip2]));
}
- if (isalpha(yytext[1])) {
+ if(promoted) cl.pieceIn = (ChessSquare) (PROMOTED cl.pieceIn);
+
+ if (isalpha(yytext[1+skip2])) {
cl.rfIn = -1;
- cl.ffIn = yytext[1] - 'a';
+ cl.ffIn = yytext[1+skip2] - AAA;
+
+ if(cl.ffIn >= BOARD_RGHT ||
+ cl.ffIn < BOARD_LEFT ) return 0;
} else {
- cl.rfIn = yytext[1] - '1';
+ cl.rfIn = yytext[1+skip2] - ONE;
cl.ffIn = -1;
+ if(cl.rfIn >= BOARD_HEIGHT ||
+ cl.rfIn < 0) return 0;
}
- cl.rtIn = yytext[3+skip] - '1';
- cl.ftIn = yytext[2+skip] - 'a';
+ cl.rtIn = yytext[3+skip] - ONE;
+ cl.ftIn = yytext[2+skip] - AAA;
cl.promoCharIn = NULLCHAR;
- Disambiguate(boards[yyboardindex],
- PosFlags(yyboardindex), EP_UNKNOWN, &cl);
- currentMoveString[0] = cl.ff + 'a';
- currentMoveString[1] = cl.rf + '1';
- currentMoveString[2] = cl.ft + 'a';
- currentMoveString[3] = cl.rt + '1';
+ if(yyleng-skip > 4) /* [HGM] can have Shogi-style promotion */
+ cl.promoCharIn = yytext[yyleng-1-(yytext[yyleng-1]==')')];
+ if(cl.promoCharIn == '+' && gameInfo.variant != VariantShogi) cl.promoCharIn = NULLCHAR; // + means check outside Shogi
+
+ /* [HGM] do not allow values beyond board size */
+ if(cl.rtIn >= BOARD_HEIGHT ||
+ cl.rtIn < 0 ||
+ cl.ftIn >= BOARD_RGHT ||
+ cl.ftIn < BOARD_LEFT )
+ return ImpossibleMove;
+
+ Disambiguate(boards[yyboardindex], PosFlags(yyboardindex), &cl);
+
+ currentMoveString[0] = cl.ff + AAA;
+ currentMoveString[1] = cl.rf + ONE;
+ currentMoveString[2] = cl.ft + AAA;
+ currentMoveString[3] = cl.rt + ONE;
currentMoveString[4] = cl.promoChar;
currentMoveString[5] = NULLCHAR;
if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
+ /* [HGM] all squares referenced to board edges in stead of absolute */
if (WhiteOnMove(yyboardindex)) {
- if (boards[yyboardindex][0][3] == WhiteKing) {
+ if (boards[yyboardindex][0][(BOARD_WIDTH-1)>>1] == WhiteKing) {
/* ICS wild castling */
- strcpy(currentMoveString, "d1f1");
rf = 0;
- ff = 3;
+ ff = (BOARD_WIDTH-1)>>1;
rt = 0;
- ft = 5;
+ ft = BOARD_RGHT-3;
} else {
- strcpy(currentMoveString, "e1c1");
rf = 0;
- ff = 4;
+ ff = BOARD_WIDTH>>1;
rt = 0;
- ft = 2;
+ ft = BOARD_LEFT+2;
}
} else{
- if (boards[yyboardindex][7][3] == BlackKing) {
+ if (boards[yyboardindex][BOARD_HEIGHT-1][(BOARD_WIDTH-1)>>1] == BlackKing) {
/* ICS wild castling */
- strcpy(currentMoveString, "d8f8");
- rf = 7;
- ff = 3;
- rt = 7;
- ft = 5;
+ rf = BOARD_HEIGHT-1;
+ ff = (BOARD_WIDTH-1)>>1;
+ rt = BOARD_HEIGHT-1;
+ ft = BOARD_RGHT-3;
} else {
- strcpy(currentMoveString, "e8c8");
- rf = 7;
- ff = 4;
- rt = 7;
- ft = 2;
+ rf = BOARD_HEIGHT-1;
+ ff = BOARD_WIDTH>>1;
+ rt = BOARD_HEIGHT-1;
+ ft = BOARD_LEFT+2;
}
}
+ if(PosFlags(0) & F_FRC_TYPE_CASTLING) {
+
+ if (WhiteOnMove(yyboardindex)) {
+ ff = initialRights[2];
+ ft = initialRights[1];
+ } else {
+ ff = initialRights[5];
+ ft = initialRights[4];
+ }
+ if (appData.debugMode)
+ {
+ fprintf(debugFP, "Parser FRC long %d %d\n", ff, ft);
+ };
+ if(ff < 0 || ft < 0) return 0;
+ }
+ sprintf(currentMoveString, "%c%c%c%c",ff+AAA,rf+ONE,ft+AAA,rt+ONE);
+ if (appData.debugMode) {
+ fprintf(debugFP, "long castling %d %d\n", ff, ft);
+ }
return (int) LegalityTest(boards[yyboardindex],
- PosFlags(yyboardindex), EP_UNKNOWN,
+ PosFlags(yyboardindex)&~F_MANDATORY_CAPTURE, // [HGM] losers: e.p.!
rf, ff, rt, ft, NULLCHAR);
}
if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
if (WhiteOnMove(yyboardindex)) {
- if (boards[yyboardindex][0][3] == WhiteKing) {
+ if (boards[yyboardindex][0][(BOARD_WIDTH-1)>>1] == WhiteKing) {
/* ICS wild castling */
- strcpy(currentMoveString, "d1b1");
rf = 0;
- ff = 3;
+ ff = (BOARD_WIDTH-1)>>1;
rt = 0;
- ft = 1;
+ ft = BOARD_LEFT+1;
} else {
- strcpy(currentMoveString, "e1g1");
rf = 0;
- ff = 4;
+ ff = BOARD_WIDTH>>1;
rt = 0;
- ft = 6;
+ ft = BOARD_RGHT-2;
}
} else {
- if (boards[yyboardindex][7][3] == BlackKing) {
+ if (boards[yyboardindex][BOARD_HEIGHT-1][(BOARD_WIDTH-1)>>1] == BlackKing) {
/* ICS wild castling */
- strcpy(currentMoveString, "d8b8");
- rf = 7;
- ff = 3;
- rt = 7;
- ft = 1;
+ rf = BOARD_HEIGHT-1;
+ ff = (BOARD_WIDTH-1)>>1;
+ rt = BOARD_HEIGHT-1;
+ ft = BOARD_LEFT+1;
} else {
- strcpy(currentMoveString, "e8g8");
- rf = 7;
- ff = 4;
- rt = 7;
- ft = 6;
+ rf = BOARD_HEIGHT-1;
+ ff = BOARD_WIDTH>>1;
+ rt = BOARD_HEIGHT-1;
+ ft = BOARD_RGHT-2;
}
}
+ if(PosFlags(0) & F_FRC_TYPE_CASTLING) {
+ if (WhiteOnMove(yyboardindex)) {
+ ff = initialRights[2];
+ ft = initialRights[0];
+ } else {
+ ff = initialRights[5];
+ ft = initialRights[3];
+ }
+ if (appData.debugMode) {
+ fprintf(debugFP, "Parser FRC short %d %d\n", ff, ft);
+ }
+ if(ff < 0 || ft < 0) return 0;
+ }
+ sprintf(currentMoveString, "%c%c%c%c",ff+AAA,rf+ONE,ft+AAA,rt+ONE);
+ if (appData.debugMode) {
+ fprintf(debugFP, "short castling %d %d\n", ff, ft);
+ }
+
return (int) LegalityTest(boards[yyboardindex],
- PosFlags(yyboardindex), EP_UNKNOWN,
+ PosFlags(yyboardindex)&~F_MANDATORY_CAPTURE, // [HGM] losers: e.p.!
rf, ff, rt, ft, NULLCHAR);
}
-[PpNnBbRrQq]@[a-h][1-8] {
- /* Bughouse piece drop. No legality checking for now. */
+[A-Za-z][@*][a-l][0-9] {
+ /* Bughouse piece drop. */
currentMoveString[1] = '@';
currentMoveString[2] = yytext[2];
currentMoveString[3] = yytext[3];
currentMoveString[4] = NULLCHAR;
+
+ if (appData.debugMode) {
+ fprintf(debugFP, "Drop: %s\n", currentMoveString);
+ }
+ /* [HGM] do not allow values beyond board size */
+ if(currentMoveString[3] - ONE >= BOARD_HEIGHT ||
+ currentMoveString[2] - AAA >= BOARD_WIDTH )
+ return ImpossibleMove;
+
if (WhiteOnMove(yyboardindex)) {
currentMoveString[0] = ToUpper(yytext[0]);
- return (int) WhiteDrop;
} else {
currentMoveString[0] = ToLower(yytext[0]);
- return (int) BlackDrop;
}
+ return LegalityTest(boards[yyboardindex], PosFlags(yyboardindex), DROP_RANK, // [HGM] does drops now too
+ CharToPiece(currentMoveString[0]), currentMoveString[3] - ONE, currentMoveString[2] - AAA, NULLCHAR);
}
[Rr]esign(s|ed)? {
return (int) GameIsDrawn;
}
-(([Ww](hite)?)|([Bb](lack)?))" "([Mm]ate(s|ed)?)|([Ww][io]n(s)?.*) {
+(([Ww](hite)?)|([Bb](lack)?))" "(([Mm]ates)|([Ww][io]n(s)?)) {
return (int) (ToUpper(yytext[0]) == 'W' ? WhiteWins : BlackWins);
}
-(([Ww](hite)?)|([Bb](lack)?))" "([Mm]ate(s|ed)?)|([Ll]os[tes]+.*) {
+(([Ww](hite)?)|([Bb](lack)?))" "(([Mm]ated)|([Ll]os[tes]+)) {
return (int) (ToUpper(yytext[0]) == 'W' ? BlackWins : WhiteWins);
}
return (int) GameUnfinished;
}
-[1-9][0-9]*/"."?[ \t\n]*[a-hNnPpRrBQqKkOo] {
+[1-9][0-9]*/"."?[ \t\n]*[a-lnprqoA-Z+] {
/* move numbers */
if ((yyleng == 1) && (yytext[0] == '1'))
return (int) MoveNumberOne;
+ else return (int) Nothing; // [HGM] make sure something is returned, for gathering parsed text
}
\([0-9]+:[0-9][0-9](\.[0-9]+)?\)|\{[0-9]+:[0-9][0-9](\.[0-9]+)?\} {
return (int) Comment;
}
-\([^()]*(\([^()]*\)[^()]*)+[^()]*\) { /* nested () */
- return (int) Comment;
+\( { /* Opening parentheses */
+ return (int) Open;
}
-\([^)][^)]+\) { /* >=2 chars in () */
- return (int) Comment;
+\) { /* closing parentheses */
+ return (int) Close;
}
^[-a-zA-Z0-9]+:" ".*(\n[ \t]+.*)* {
- /* Skip mail headers */
+ return (int) Nothing; /* Skip mail headers */
}
[a-zA-Z0-9'-]+ {
- /* Skip random words */
+ return (int) Nothing; /* Skip random words */
}
.|\n {
- /* Skip everything else */
+ return (int) Nothing; /* Skip everything else */
}
%%
static void output(ch)
int ch;
{
- fprintf(stderr, "PARSER BUG: unmatched character '%c' (0%o)\n",
+ if(appData.debugMode) fprintf(debugFP, "PARSER BUG: unmatched character '%c' (0%o)\n",
ch, ch);
}
StringToLex--;
} else {
if (unputCount >= UNPUT_BUF_SIZE)
- fprintf(stderr, "PARSER BUG: unput buffer overflow '%c' (0%o)\n",
+ if(appData.debugMode) fprintf(debugFP, "PARSER BUG: unput buffer overflow '%c' (0%o)\n",
ch, ch);
unputBuffer[unputCount++] = ch;
}
/* Parse a move from the given string s */
/* ^ at start of pattern WON'T work here unless using flex */
-ChessMove yylexstr(boardIndex, s)
- int boardIndex;
- char *s;
+ChessMove yylexstr(boardIndex, s, text, len)
+ int boardIndex, len;
+ char *s, *text;
{
ChessMove ret;
char *oldStringToLex;
yy_switch_to_buffer(buffer);
#endif /*FLEX_SCANNER*/
- ret = (ChessMove) yylex();
+ ret = (ChessMove) Myylex();
+ strncpy(text, yy_text, len-1); // [HGM] vari: yy_text is not available to caller after buffer switch ?!?
+ text[len-1] = NULLCHAR;
#ifdef FLEX_SCANNER
if (oldBuffer != NULL)
return ret;
}
+
+int Myylex()
+{ // [HGM] wrapper for yylex, which treats nesting of parentheses
+ int symbol, nestingLevel = 0, i=0;
+ char *p;
+ static char buf[256*MSG_SIZ];
+ buf[0] = NULLCHAR;
+ do { // eat away anything not at level 0
+ symbol = yylex();
+ if(symbol == Open) nestingLevel++;
+ if(nestingLevel) { // save all parsed text between (and including) the ()
+ for(p=yytext; *p && i<256*MSG_SIZ-2;) buf[i++] = *p++;
+ buf[i] = NULLCHAR;
+ }
+ if(symbol == 0) break; // ran into EOF
+ if(symbol == Close) symbol = Comment, nestingLevel--;
+ } while(nestingLevel || symbol == Nothing);
+ yy_text = buf[0] ? buf : (char*)yytext;
+ return symbol;
+}
projects / xboard.git / blobdiff