--- /dev/null
+%a 10000
+%o 10000
+%e 2000
+%k 2500
+%p 7000
+%n 1000
+%{
+/*
+ * 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.
+ *
+ * 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.
+ * ------------------------------------------------------------------------
+ */
+
+/* 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).
+ */
+
+#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 */
+#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));
+
+%}
+%%
+
+[RrBbNnQqKkPp][/]?[a-h][1-8][xX:-]?[a-h][1-8](=?\(?[RrBbNnQqKk]\)?)? {
+ /*
+ * Fully-qualified algebraic move, possibly with promotion
+ */
+ int skip1 = 0, skip2 = 0;
+ ChessSquare piece;
+ ChessMove result;
+
+ if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
+
+ /* remove the / */
+ if (yytext[1] == '/') skip1 = 1;
+
+ /* 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 (yyleng-skip1-skip2 > 5) {
+ if (yytext[yyleng-1] == ')') {
+ currentMoveString[4] = ToLower(yytext[yyleng-2]);
+ } else {
+ currentMoveString[4] = ToLower(yytext[yyleng-1]);
+ }
+ currentMoveString[5] = NULLCHAR;
+ }
+
+ piece = boards[yyboardindex]
+ [currentMoveString[1] - '1'][currentMoveString[0] - 'a'];
+ if (ToLower(yytext[0]) != ToLower(PieceToChar(piece)))
+ return (int) IllegalMove;
+
+ result = LegalityTest(boards[yyboardindex],
+ PosFlags(yyboardindex), EP_UNKNOWN,
+ currentMoveString[1] - '1',
+ currentMoveString[0] - 'a',
+ currentMoveString[3] - '1',
+ currentMoveString[2] - 'a',
+ currentMoveString[4]);
+
+ if (currentMoveString[4] == NULLCHAR &&
+ (result == WhitePromotionQueen || result == BlackPromotionQueen)) {
+ currentMoveString[4] = 'q';
+ currentMoveString[5] = NULLCHAR;
+ }
+
+ return (int) result;
+}
+
+[a-h][1-8][xX:-]?[a-h][1-8](=?\(?[RrBbNnQqKk]\)?)? {
+ /*
+ * Simple algebraic move, possibly with promotion
+ */
+ 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) {
+ if (yytext[yyleng-1] == ')') {
+ currentMoveString[4] = ToLower(yytext[yyleng-2]);
+ } else {
+ currentMoveString[4] = ToLower(yytext[yyleng-1]);
+ }
+ currentMoveString[5] = NULLCHAR;
+ }
+
+ result = LegalityTest(boards[yyboardindex],
+ PosFlags(yyboardindex), EP_UNKNOWN,
+ currentMoveString[1] - '1',
+ currentMoveString[0] - 'a',
+ currentMoveString[3] - '1',
+ currentMoveString[2] - 'a',
+ currentMoveString[4]);
+
+ if (currentMoveString[4] == NULLCHAR &&
+ (result == WhitePromotionQueen || result == BlackPromotionQueen)) {
+ currentMoveString[4] = 'q';
+ currentMoveString[5] = NULLCHAR;
+ }
+
+ return (int) result;
+}
+
+[a-h][1-8](=?\(?[RrBbNnQqKk]\)?)? {
+ /*
+ * Pawn move, possibly with promotion
+ */
+ DisambiguateClosure cl;
+ int skip = 0;
+
+ if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
+
+ /* remove the =() */
+ if (yytext[2] == '=') 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';
+ currentMoveString[4] = cl.promoChar;
+ currentMoveString[5] = NULLCHAR;
+
+ return (int) cl.kind;
+}
+
+
+(ab|bc|cd|de|ef|fg|gh|hg|gf|fe|ed|dc|cb|ba|([a-h][xX:-][a-h]))(=?\(?[RrBbNnQqKk]\)?)?(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] == '=') skip2++;
+ if (yytext[2+skip1+skip2] == '(') skip2++;
+
+ cl.pieceIn = WhiteOnMove(yyboardindex) ? WhitePawn : BlackPawn;
+ cl.rfIn = -1;
+ cl.ffIn = yytext[0] - 'a';
+ cl.rtIn = -1;
+ cl.ftIn = yytext[1+skip1] - 'a';
+ cl.promoCharIn = yytext[2+skip1+skip2];
+ 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';
+ currentMoveString[4] = cl.promoChar;
+ currentMoveString[5] = NULLCHAR;
+
+ return (int) cl.kind;
+}
+
+[a-h][xX:]?[a-h][1-8](=?\(?[RrBbNnQqKk]\)?)?(ep|"e.p.")? {
+ /*
+ * unambiguously abbreviated Pawn capture, possibly with promotion
+ */
+ int skip = 0;
+ ChessMove result;
+
+ 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];
+ if (WhiteOnMove(yyboardindex)) {
+ if (yytext[2+skip] == '1') return (int) ImpossibleMove;
+ currentMoveString[1] = yytext[2+skip] - 1;
+ } else {
+ if (yytext[2+skip] == '8') return (int) ImpossibleMove;
+ currentMoveString[1] = yytext[2+skip] + 1;
+ }
+ if (yyleng-skip > 3) {
+ if (yytext[yyleng-1] == ')')
+ currentMoveString[4] = ToLower(yytext[yyleng-2]);
+ else
+ currentMoveString[4] = ToLower(yytext[yyleng-1]);
+ currentMoveString[5] = NULLCHAR;
+ } else {
+ currentMoveString[4] = NULLCHAR;
+ }
+
+ result = LegalityTest(boards[yyboardindex],
+ PosFlags(yyboardindex), EP_UNKNOWN,
+ currentMoveString[1] - '1',
+ currentMoveString[0] - 'a',
+ currentMoveString[3] - '1',
+ currentMoveString[2] - 'a',
+ currentMoveString[4]);
+
+ if (currentMoveString[4] == NULLCHAR &&
+ (result == WhitePromotionQueen || result == BlackPromotionQueen)) {
+ currentMoveString[4] = 'q';
+ 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), EP_UNKNOWN,
+ currentMoveString[1] - '1',
+ currentMoveString[0] - 'a',
+ currentMoveString[3] - '1',
+ currentMoveString[2] - 'a',
+ currentMoveString[4]);
+
+ if (result == WhiteCapturesEnPassant || result == BlackCapturesEnPassant)
+ return (int) result;
+ else
+ return (int) IllegalMove;
+}
+
+[RrBbNnQqKk][xX:-]?[a-h][1-8] {
+ /*
+ * piece move, possibly ambiguous
+ */
+ DisambiguateClosure cl;
+ int skip = 0;
+
+ if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
+
+ /* remove the [xX:-] */
+ if ((yytext[1] == 'x') || (yytext[1] == 'X')
+ || (yytext[1] == ':') || (yytext[1] == '-')) skip = 1;
+
+ if (WhiteOnMove(yyboardindex)) {
+ cl.pieceIn = CharToPiece(ToUpper(yytext[0]));
+ } else {
+ cl.pieceIn = CharToPiece(ToLower(yytext[0]));
+ }
+ cl.rfIn = -1;
+ cl.ffIn = -1;
+ cl.rtIn = yytext[2+skip] - '1';
+ cl.ftIn = yytext[1+skip] - 'a';
+ 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';
+ currentMoveString[4] = cl.promoChar;
+ currentMoveString[5] = NULLCHAR;
+
+ return (int) cl.kind;
+}
+
+[RrBbNnQqKk][a-h1-8][xX:-]?[a-h][1-8] {
+ /*
+ * piece move with rank or file disambiguator
+ */
+ DisambiguateClosure cl;
+ int skip = 0;
+
+ if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
+
+ /* remove the [xX:-] */
+ if ((yytext[2] == 'x') || (yytext[2] == 'X')
+ || (yytext[2] == ':') || (yytext[2] == '-')) skip = 1;
+
+ if (WhiteOnMove(yyboardindex)) {
+ cl.pieceIn = CharToPiece(ToUpper(yytext[0]));
+ } else {
+ cl.pieceIn = CharToPiece(ToLower(yytext[0]));
+ }
+ if (isalpha(yytext[1])) {
+ cl.rfIn = -1;
+ cl.ffIn = yytext[1] - 'a';
+ } else {
+ cl.rfIn = yytext[1] - '1';
+ cl.ffIn = -1;
+ }
+ cl.rtIn = yytext[3+skip] - '1';
+ cl.ftIn = yytext[2+skip] - 'a';
+ 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';
+ 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 */
+
+ if (WhiteOnMove(yyboardindex)) {
+ if (boards[yyboardindex][0][3] == WhiteKing) {
+ /* ICS wild castling */
+ strcpy(currentMoveString, "d1f1");
+ rf = 0;
+ ff = 3;
+ rt = 0;
+ ft = 5;
+ } else {
+ strcpy(currentMoveString, "e1c1");
+ rf = 0;
+ ff = 4;
+ rt = 0;
+ ft = 2;
+ }
+ } else{
+ if (boards[yyboardindex][7][3] == BlackKing) {
+ /* ICS wild castling */
+ strcpy(currentMoveString, "d8f8");
+ rf = 7;
+ ff = 3;
+ rt = 7;
+ ft = 5;
+ } else {
+ strcpy(currentMoveString, "e8c8");
+ rf = 7;
+ ff = 4;
+ rt = 7;
+ ft = 2;
+ }
+ }
+ return (int) LegalityTest(boards[yyboardindex],
+ PosFlags(yyboardindex), EP_UNKNOWN,
+ 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][3] == WhiteKing) {
+ /* ICS wild castling */
+ strcpy(currentMoveString, "d1b1");
+ rf = 0;
+ ff = 3;
+ rt = 0;
+ ft = 1;
+ } else {
+ strcpy(currentMoveString, "e1g1");
+ rf = 0;
+ ff = 4;
+ rt = 0;
+ ft = 6;
+ }
+ } else {
+ if (boards[yyboardindex][7][3] == BlackKing) {
+ /* ICS wild castling */
+ strcpy(currentMoveString, "d8b8");
+ rf = 7;
+ ff = 3;
+ rt = 7;
+ ft = 1;
+ } else {
+ strcpy(currentMoveString, "e8g8");
+ rf = 7;
+ ff = 4;
+ rt = 7;
+ ft = 6;
+ }
+ }
+ return (int) LegalityTest(boards[yyboardindex],
+ PosFlags(yyboardindex), EP_UNKNOWN,
+ rf, ff, rt, ft, NULLCHAR);
+}
+
+[PpNnBbRrQq]@[a-h][1-8] {
+ /* Bughouse piece drop. No legality checking for now. */
+ currentMoveString[1] = '@';
+ currentMoveString[2] = yytext[2];
+ currentMoveString[3] = yytext[3];
+ currentMoveString[4] = NULLCHAR;
+ if (WhiteOnMove(yyboardindex)) {
+ currentMoveString[0] = ToUpper(yytext[0]);
+ return (int) WhiteDrop;
+ } else {
+ currentMoveString[0] = ToLower(yytext[0]);
+ return (int) BlackDrop;
+ }
+}
+
+[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]ate(s|ed)?)|([Ww][io]n(s)?.*) {
+ return (int) (ToUpper(yytext[0]) == 'W' ? WhiteWins : BlackWins);
+}
+
+(([Ww](hite)?)|([Bb](lack)?))" "([Mm]ate(s|ed)?)|([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-hNnPpRrBQqKkOo] {
+ /* move numbers */
+ if ((yyleng == 1) && (yytext[0] == '1'))
+ return (int) MoveNumberOne;
+}
+
+\([0-9]+:[0-9][0-9](\.[0-9]+)?\)|\{[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;
+}
+
+\([^()]*(\([^()]*\)[^()]*)+[^()]*\) { /* nested () */
+ return (int) Comment;
+}
+
+\([^)][^)]+\) { /* >=2 chars in () */
+ return (int) Comment;
+}
+
+^[-a-zA-Z0-9]+:" ".*(\n[ \t]+.*)* {
+ /* Skip mail headers */
+}
+
+[a-zA-Z0-9'-]+ {
+ /* Skip random words */
+}
+
+.|\n {
+ /* 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;
+{
+ fprintf(stderr, "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)
+ fprintf(stderr, "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)
+ int boardIndex;
+ char *s;
+{
+ 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) yylex();
+
+#ifdef FLEX_SCANNER
+ if (oldBuffer != NULL)
+ yy_switch_to_buffer(oldBuffer);
+ yy_delete_buffer(buffer);
+#endif /*FLEX_SCANNER*/
+ StringToLex = oldStringToLex;
+
+ return ret;
+}
projects / xboard.git / blobdiff