+++ /dev/null
-%a 10000
-%o 10000
-%e 2000
-%k 2500
-%p 7000
-%n 1000
-%{
-/*
- * parser.l -- lex parser of algebraic chess moves for XBoard
- *
- * Copyright 1991 by Digital Equipment Corporation, Maynard,
- * Massachusetts.
- *
- * Enhancements Copyright 1992-2001, 2002, 2003, 2004, 2005,
- * 2006, 2007, 2008, 2009, 2010, 2011 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:
- * ------------------------------------------------------------------------
- *
- * 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 3 of the License, or (at
- * your option) any later version.
- *
- * 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, 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"
-
-#define NO_CONSTRAINT -1
-#undef YYLMAX
-#define YYLMAX 4096
-#define UNPUT_BUF_SIZE YYLMAX
-
-#ifdef FLEX_SCANNER
-/* yytext is probably a char*, but could be a char[]. yy_text is set
- in YY_DECL below, because if yytext is a char*, its value is not
- constant. */
-char *yy_text;
-#else /*!FLEX_SCANNER*/
-/* yytext is definitely a char[], so yy_text can be set here, statically. */
-char *yy_text = (char *) yytext;
-#endif
-
-#ifdef FLEX_SCANNER
-/* This is flex */
-/* [AP] use prototypes in function declarations */
-#define YY_USE_PROTOS
-
-#ifdef YY_USE_PROTOS
-#define YY_PROTO(proto) proto
-#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)
-#undef YY_DECL
-#define YY_DECL \
- int _yylex YY_PROTO((void)); \
- int yylex YY_PROTO((void)) \
- { \
- int result = _yylex(); \
- yy_text = (char *) yytext; \
- return(result); \
- } \
- int _yylex YY_PROTO((void))
-#else
-/* This is lex */
-#undef input
-#undef output
-#undef unput
-#endif
-
-/* The includes must be here, below the #undef input */
-
-#include <ctype.h>
-
-#if STDC_HEADERS
-# include <stdlib.h>
-# include <string.h>
-#else /* not STDC_HEADERS */
-# if HAVE_STRING_H
-# include <string.h>
-# else /* not HAVE_STRING_H */
-# include <strings.h>
-# endif /* not HAVE_STRING_H */
-#endif /* not STDC_HEADERS */
-
-#if HAVE_UNISTD_H
-# include <unistd.h>
-#endif
-
-#if defined(_amigados)
-# include <errno.h>
-# if HAVE_FCNTL_H
-# include <fcntl.h> /* isatty() prototype */
-# endif /* HAVE_FCNTL_H */
-#endif /* defined(_amigados) */
-
-#include "common.h"
-#include "backend.h"
-#include "frontend.h"
-#include "parser.h"
-#include "moves.h"
-
-extern int PosFlags P((int));
-
-extern Board boards[MAX_MOVES];
-int yyboardindex;
-int yyskipmoves = FALSE;
-char currentMoveString[YYLMAX];
-#ifndef FLEX_SCANNER
-char unputBuffer[UNPUT_BUF_SIZE];
-int unputCount = 0;
-#endif
-
-#ifdef FLEX_SCANNER
-void my_yy_input P((char *buf, int *result, int max_size));
-#else /*!FLEX_SCANNER*/
-static int input P((void));
-static void output P((int ch));
-static void unput P((int ch));
-int yylook P((void));
-int yyback P((int *, int));
-#endif
-#undef yywrap
-int yywrap P((void));
-extern void CopyBoard P((Board to, Board from));
-
-%}
-%%
-
-"+"?[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, 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] == '/') skip1++;
-
- /* remove the [xX:-] */
- if ((yytext[3+skip1] == 'x') || (yytext[3+skip1] == 'X') ||
- (yytext[3+skip1] == '-') || (yytext[3+skip1] == ':')) skip2 = 1;
-
- currentMoveString[0] = yytext[1+skip1];
- currentMoveString[1] = yytext[2+skip1];
- currentMoveString[2] = yytext[3+skip1+skip2];
- currentMoveString[3] = yytext[4+skip1+skip2];
- currentMoveString[4] = NULLCHAR;
-
- 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 {
- 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] - 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)&~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) {
- 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-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;
-
- 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];
- currentMoveString[1] = yytext[1];
- currentMoveString[2] = yytext[2+skip];
- currentMoveString[3] = yytext[3+skip];
- currentMoveString[4] = NULLCHAR;
-
- if (yyleng-skip > 4) { char c;
- if (yytext[yyleng-1] == ')') {
- c = currentMoveString[4] = ToLower(yytext[yyleng-2]);
- } else {
- c = currentMoveString[4] = ToLower(yytext[yyleng-1]);
- }
- if(c == '+' && gameInfo.variant != VariantShogi) 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)&~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) {
- 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 && gameInfo.variant != VariantSChess && // 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-l][0-9]((=?\(?[A-Za-z]\)?)|[=+])? {
- /*
- * Pawn move, possibly with promotion
- */
- DisambiguateClosure cl;
- int skip = 0;
-
- if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
-
- /* remove the =() */
- 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] - 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;
-
- return (int) cl.kind;
-}
-
-
-(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;
-
- if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
-
- /* remove trailing ep or e.p. (nonstandard PGN) */
- if (yytext[yyleng-1] == 'p') {
- yyleng -= 2;
- yytext[yyleng] = NULLCHAR;
- } else if (yytext[yyleng-1] == '.') {
- yyleng -= 4;
- yytext[yyleng] = NULLCHAR;
- }
-
- /* remove the [xX:-] and =() */
- if ((yytext[1] == 'x') || (yytext[1] == 'X')
- || (yytext[1] == ':') || (yytext[1] == '-')) skip1 = 1;
- 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] - AAA;
- cl.rtIn = -1;
- cl.ftIn = yytext[1+skip1] - AAA;
- cl.promoCharIn = yytext[2+skip1+skip2];
- 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;
-
- 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-l][xX:]?[a-l][0-9]((=?\(?[A-Z]\)?)|ep|"e.p."|[=+])? {
- /*
- * unambiguously abbreviated Pawn capture, possibly with promotion
- */
- int skip = 0;
- ChessMove result; char c;
-
- if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
-
- /* remove trailing ep or e.p. (nonstandard PGN) */
- if (yytext[yyleng-1] == 'p') {
- yyleng -= 2;
- yytext[yyleng] = NULLCHAR;
- } else if (yytext[yyleng-1] == '.') {
- yyleng -= 4;
- yytext[yyleng] = NULLCHAR;
- }
-
- /* remove the [xX:-] */
- if ((yytext[1] == 'x') || (yytext[1] == 'X')
- || (yytext[1] == ':') || (yytext[1] == '-')) skip = 1;
-
- 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] == ONE) return (int) ImpossibleMove;
- currentMoveString[1] = yytext[2+skip] - 1;
- if(boards[yyboardindex][currentMoveString[1]-ONE][currentMoveString[0]-AAA] != WhitePawn)
- return ImpossibleMove;
- } else {
- 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] == ')')
- c = currentMoveString[4] = ToLower(yytext[yyleng-2]);
- else
- 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)&~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) {
- 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;
-
- /* Special case: improperly written en passant capture */
- if (WhiteOnMove(yyboardindex)) {
- if (currentMoveString[3] == '5') {
- currentMoveString[1] = '5';
- currentMoveString[3] = '6';
- } else {
- return (int) IllegalMove;
- }
- } else {
- if (currentMoveString[3] == '4') {
- currentMoveString[1] = '4';
- currentMoveString[3] = '3';
- } else {
- return (int) IllegalMove;
- }
- }
-
- 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]);
-
- if (result == WhiteCapturesEnPassant || result == BlackCapturesEnPassant)
- return (int) result;
- else { // [HGM] all very nice, but this messed up the input move that we might want to accept with legality testing off...
- if (WhiteOnMove(yyboardindex)) // undo the damage
- currentMoveString[1]--, currentMoveString[3]--;
- else currentMoveString[1]++, currentMoveString[3]++;
- return (int) IllegalMove;
- }
-}
-
-"+"?[A-Z][xX:-]?[a-l][0-9](([=/]?\(?[A-Z]\)?)|[=+])? {
- /*
- * piece move, possibly ambiguous
- */
- DisambiguateClosure cl;
- 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+skip] == 'x') || (yytext[1+skip] == 'X')
- || (yytext[1+skip] == ':') || (yytext[1+skip] == '-')) skip++;
-
- if (WhiteOnMove(yyboardindex)) {
- cl.pieceIn = CharToPiece(ToUpper(yytext[skip2]));
- } else {
- 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] - ONE;
- cl.ftIn = yytext[1+skip] - AAA;
- cl.promoCharIn = NULLCHAR;
-
- if(yyleng-skip > 3) /* [HGM] in some variants pieces promote */
- 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;
-}
-
-"+"?[A-Z][a-l0-9][xX:-]?[a-l][0-9](([=/]?\(?[A-Z]\)?)|[=+])? {
- /*
- * piece move with rank or file disambiguator
- */
- DisambiguateClosure cl;
- 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+skip] == 'x') || (yytext[2+skip] == 'X')
- || (yytext[2+skip] == ':') || (yytext[2+skip] == '-')) skip++;
-
- if (WhiteOnMove(yyboardindex)) {
- cl.pieceIn = CharToPiece(ToUpper(yytext[skip2]));
- } else {
- cl.pieceIn = CharToPiece(ToLower(yytext[skip2]));
- }
- if(promoted) cl.pieceIn = (ChessSquare) (PROMOTED cl.pieceIn);
-
- if (isalpha(yytext[1+skip2])) {
- cl.rfIn = -1;
- cl.ffIn = yytext[1+skip2] - AAA;
-
- if(cl.ffIn >= BOARD_RGHT ||
- cl.ffIn < BOARD_LEFT ) return 0;
- } else {
- cl.rfIn = yytext[1+skip2] - ONE;
- cl.ffIn = -1;
- if(cl.rfIn >= BOARD_HEIGHT ||
- cl.rfIn < 0) return 0;
- }
- cl.rtIn = yytext[3+skip] - ONE;
- cl.ftIn = yytext[2+skip] - AAA;
- cl.promoCharIn = NULLCHAR;
-
- if(yyleng-skip > 4) /* [HGM] in some variants pieces promote */
- 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;
-
- return (int) cl.kind;
-}
-
-000|0-0-0|ooo|OOO|o-o-o|O-O-O {
- int rf, ff, rt, ft;
-
- 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][(BOARD_WIDTH-1)>>1] == WhiteKing) {
- /* ICS wild castling */
- rf = 0;
- ff = (BOARD_WIDTH-1)>>1;
- rt = 0;
- ft = BOARD_RGHT-3;
- } else {
- rf = 0;
- ff = BOARD_WIDTH>>1;
- rt = 0;
- ft = BOARD_LEFT+2;
- }
- } else{
- if (boards[yyboardindex][BOARD_HEIGHT-1][(BOARD_WIDTH-1)>>1] == BlackKing) {
- /* ICS wild castling */
- rf = BOARD_HEIGHT-1;
- ff = (BOARD_WIDTH-1)>>1;
- rt = BOARD_HEIGHT-1;
- ft = BOARD_RGHT-3;
- } else {
- 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 == NoRights || ft == NoRights) return ImpossibleMove;
- }
- 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)&~F_MANDATORY_CAPTURE, // [HGM] losers: e.p.!
- rf, ff, rt, ft, NULLCHAR);
-}
-
-00|0-0|oo|OO|o-o|O-O {
- int rf, ff, rt, ft;
-
- if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
-
- if (WhiteOnMove(yyboardindex)) {
- if (boards[yyboardindex][0][(BOARD_WIDTH-1)>>1] == WhiteKing) {
- /* ICS wild castling */
- rf = 0;
- ff = (BOARD_WIDTH-1)>>1;
- rt = 0;
- ft = BOARD_LEFT+1;
- } else {
- rf = 0;
- ff = BOARD_WIDTH>>1;
- rt = 0;
- ft = BOARD_RGHT-2;
- }
- } else {
- if (boards[yyboardindex][BOARD_HEIGHT-1][(BOARD_WIDTH-1)>>1] == BlackKing) {
- /* ICS wild castling */
- rf = BOARD_HEIGHT-1;
- ff = (BOARD_WIDTH-1)>>1;
- rt = BOARD_HEIGHT-1;
- ft = BOARD_LEFT+1;
- } else {
- 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 == NoRights || ft == NoRights) return ImpossibleMove;
- }
- 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)&~F_MANDATORY_CAPTURE, // [HGM] losers: e.p.!
- rf, ff, rt, ft, NULLCHAR);
-}
-
-[A-Za-z][@*][a-l][0-9] {
-
- if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
-
- /* 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]);
- } else {
- currentMoveString[0] = ToLower(yytext[0]);
- }
- if(CharToPiece(currentMoveString[0]) == EmptySquare) return ImpossibleMove; // Unknown piece;
-
- 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)? {
- if (WhiteOnMove(yyboardindex))
- return (int) BlackWins;
- else
- return (int) WhiteWins;
-}
-
-(([Ww](hite)?)|([Bb](lack)?))" "(([Rr]esign)|([Ff]orfeit))(s|ed)? {
- return (int) (ToUpper(yytext[0]) == 'W' ? BlackWins : WhiteWins);
-}
-
-(([Ww](hite)?)|([Bb](lack)?))" "[Dd]isconnect(s|ed) {
- return (int) GameUnfinished;
-}
-
-[Ss]talemate {
- return (int) GameIsDrawn;
-}
-
-"+-+" {
- return (int) GameIsDrawn;
-}
-
-([Cc]heck)?[Mm]ate {
- if (WhiteOnMove(yyboardindex))
- return (int) BlackWins;
- else
- return (int) WhiteWins;
-}
-
-"++" {
- if (WhiteOnMove(yyboardindex))
- return (int) BlackWins;
- else
- return (int) WhiteWins;
-}
-
-[Dd]raw(n)?(" "by)?(" "[Rr]epetition)|(" "[Aa]gree(d|ment)) {
- return (int) GameIsDrawn;
-}
-
-[Dd]raw(n)?(" (".*")")? {
- return (int) GameIsDrawn;
-}
-
-(([Ww](hite)?)|([Bb](lack)?))" "(([Mm]ates)|([Ww][io]n(s)?)) {
- return (int) (ToUpper(yytext[0]) == 'W' ? WhiteWins : BlackWins);
-}
-
-(([Ww](hite)?)|([Bb](lack)?))" "(([Mm]ated)|([Ll]os[tes]+)) {
- return (int) (ToUpper(yytext[0]) == 'W' ? BlackWins : WhiteWins);
-}
-
-("{"[^\}]*"}"[ \n])?(1-0|"1 - 0"|"1/0"|"1 / 0"|"1:0"|"1 : 0")(" (".*")"|" {".*"}")? {
- return (int) WhiteWins;
-}
-
-("{"[^\}]*"}"[ \n])?(0-1|"0 - 1"|"0/1"|"0 / 1"|"0:1"|"0 : 1")(" (".*")"|" {".*"}")? {
- return (int) BlackWins;
-}
-
-("{"[^\}]*"}"[ \n])?("1/2"|"1 / 2")(" "?[-:]" "?("1/2"|"1 / 2"))?(" (".*")"|" {".*"}")? {
- return (int) GameIsDrawn;
-}
-
-("{"[^\}]*"}"[ \n])?"*"(" (".*")"|" {".*"}")? {
- return (int) GameUnfinished;
-}
-
-[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]+)?\} {
- /* elapsed time indication, e.g. (0:12) or {10:21.071} */
- return (int) ElapsedTime;
-}
-
-"[--"[^\]]*"--]" {
- /* position diagram enclosed in [-- --] */
- return (int) PositionDiagram;
-}
-
-^"{--------------"\n[^\}]*\n"--------------}"$ {
- /* position diagram enclosed in {-- --} */
- return (int) PositionDiagram;
-}
-
-\[[ \t\n]*[A-Za-z0-9][A-Za-z0-9_+#=-]*[ \t\n]*\"[^"]*\"[ \t\n]*\] {
- return (int) PGNTag;
-}
-
-[Gg](nu|NU)" "?[Cc](hess|HESS).*[Gg](ame|AME) {
- return (int) GNUChessGame;
-}
-
-^[#;%]" "[^ ]*(" game file"|" position file").*$ {
- return (int) XBoardGame;
-}
-
-\$[0-9]+ { /* numeric annotation glyph */
- return (int) NAG;
-}
-
-\{[^\}]*\} { /* anything in {} */
- return (int) Comment;
-}
-
-;.*$ { /* ; to end of line */
- return (int) Comment;
-}
-
-\[[^\]]*\] { /* anything in [] */
- return (int) Comment;
-}
-
-\( { /* Opening parentheses */
- return (int) Open;
-}
-
-\) { /* closing parentheses */
- return (int) Close;
-}
-
-^[-a-zA-Z0-9]+:" ".*(\n[ \t]+.*)* {
- return (int) Nothing; /* Skip mail headers */
-}
-
-[a-zA-Z0-9'-]+ {
- return (int) Nothing; /* Skip random words */
-}
-
-.|\n {
- return (int) Nothing; /* Skip everything else */
-}
-
-%%
-
-
-static char *StringToLex;
-
-#ifndef FLEX_SCANNER
-static FILE *lexFP;
-
-static int input()
-{
- int ret;
-
- if (StringToLex != NULL) {
- ret = *StringToLex;
- if (ret == NULLCHAR)
- ret = EOF;
- else
- StringToLex++;
- } else if (unputCount > 0) {
- ret = unputBuffer[--unputCount];
- } else {
- ret = fgetc(lexFP);
- }
-
- if (ret == EOF)
- return 0;
- else
- return ret;
-}
-
-/*
- * Return offset of next pattern within current file
- */
-int yyoffset()
-{
- int offset = ftell(lexFP) - unputCount;
-
- if (offset < 0) {
- offset = 0;
- }
- return(offset);
-}
-
-static void output(ch)
- int ch;
-{
- if(appData.debugMode) fprintf(debugFP, "PARSER BUG: unmatched character '%c' (0%o)\n",
- ch, ch);
-}
-
-static void unput(ch)
- int ch;
-{
- if (ch == 0) return;
- if (StringToLex != NULL) {
- StringToLex--;
- } else {
- if (unputCount >= UNPUT_BUF_SIZE)
- if(appData.debugMode) fprintf(debugFP, "PARSER BUG: unput buffer overflow '%c' (0%o)\n",
- ch, ch);
- unputBuffer[unputCount++] = ch;
- }
-}
-
-/* Get ready to lex from a new file. Kludge below sticks
- an artificial newline at the front of the file, which the
- above grammar ignores, but which makes ^ at start of pattern
- match at the real start of the file.
-*/
-void yynewfile(f)
- FILE *f;
-{
- lexFP = f;
- StringToLex = NULL;
- unputCount = 0;
- unput('\n'); /* kludge */
-}
-
-/* Get ready to lex from a string. ^ at start of pattern WON'T
- match at the start of the string!
-*/
-void yynewstr(s)
- char *s;
-{
- lexFP = NULL;
- StringToLex = s;
- unputCount = 0;
-}
-#endif /*!FLEX_SCANNER*/
-
-#ifdef FLEX_SCANNER
-void my_yy_input(buf, result, max_size)
- char *buf;
- int *result;
- int max_size;
-{
- int count;
-
- if (StringToLex != NULL) {
- count = 0;
- while (*StringToLex != NULLCHAR) {
- *buf++ = *StringToLex++;
- count++;
- }
- *result = count;
- return;
- } else {
- count = fread(buf, 1, max_size, yyin);
- if (count == 0) {
- *result = YY_NULL;
- } else {
- *result = count;
- }
- return;
- }
-}
-
-static YY_BUFFER_STATE my_file_buffer = NULL;
-
-/*
- Return offset of next pattern in the current file.
-*/
-int yyoffset()
-{
- int pos = yy_c_buf_p - YY_CURRENT_BUFFER->yy_ch_buf;
-
- return(ftell(YY_CURRENT_BUFFER->yy_input_file) -
- yy_n_chars + pos);
-}
-
-
-void yynewstr(s)
- char *s;
-{
- if (my_file_buffer != NULL)
- yy_delete_buffer(my_file_buffer);
- StringToLex = s;
- my_file_buffer = yy_create_buffer(stdin, YY_BUF_SIZE);
- yy_switch_to_buffer(my_file_buffer);
-}
-
-void yynewfile(f)
- FILE *f;
-{
- if (my_file_buffer != NULL)
- yy_delete_buffer(my_file_buffer);
- StringToLex = NULL;
- my_file_buffer = yy_create_buffer(f, YY_BUF_SIZE);
- yy_switch_to_buffer(my_file_buffer);
-}
-#endif /*FLEX_SCANNER*/
-
-int yywrap()
-{
- return TRUE;
-}
-
-/* Parse a move from the given string s */
-/* ^ at start of pattern WON'T work here unless using flex */
-ChessMove yylexstr(boardIndex, s, text, len)
- int boardIndex, len;
- char *s, *text;
-{
- ChessMove ret;
- char *oldStringToLex;
-#ifdef FLEX_SCANNER
- YY_BUFFER_STATE buffer, oldBuffer;
-#endif
-
- yyboardindex = boardIndex;
- oldStringToLex = StringToLex;
- StringToLex = s;
-#ifdef FLEX_SCANNER
- buffer = yy_create_buffer(stdin, YY_BUF_SIZE);
- oldBuffer = YY_CURRENT_BUFFER;
- yy_switch_to_buffer(buffer);
-#endif /*FLEX_SCANNER*/
-
- 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)
- yy_switch_to_buffer(oldBuffer);
- yy_delete_buffer(buffer);
-#endif /*FLEX_SCANNER*/
- StringToLex = oldStringToLex;
-
- 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 / commitdiff