9 * parser.l -- lex parser of algebraic chess moves for XBoard
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10 * $Id: parser.l,v 2.1 2003/10/27 19:21:00 mann Exp $
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12 * Copyright 1991 by Digital Equipment Corporation, Maynard, Massachusetts.
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13 * Enhancements Copyright 1992-95 Free Software Foundation, Inc.
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15 * The following terms apply to Digital Equipment Corporation's copyright
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16 * interest in XBoard:
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17 * ------------------------------------------------------------------------
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18 * All Rights Reserved
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20 * Permission to use, copy, modify, and distribute this software and its
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21 * documentation for any purpose and without fee is hereby granted,
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22 * provided that the above copyright notice appear in all copies and that
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23 * both that copyright notice and this permission notice appear in
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24 * supporting documentation, and that the name of Digital not be
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25 * used in advertising or publicity pertaining to distribution of the
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26 * software without specific, written prior permission.
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28 * DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
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29 * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
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30 * DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
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31 * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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32 * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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33 * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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35 * ------------------------------------------------------------------------
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37 * The following terms apply to the enhanced version of XBoard distributed
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38 * by the Free Software Foundation:
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39 * ------------------------------------------------------------------------
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40 * This program is free software; you can redistribute it and/or modify
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41 * it under the terms of the GNU General Public License as published by
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42 * the Free Software Foundation; either version 2 of the License, or
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43 * (at your option) any later version.
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45 * This program is distributed in the hope that it will be useful,
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46 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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47 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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48 * GNU General Public License for more details.
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50 * You should have received a copy of the GNU General Public License
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51 * along with this program; if not, write to the Free Software
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52 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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53 * ------------------------------------------------------------------------
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56 /* This parser handles all forms of promotion.
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57 * The parser resolves ambiguous moves by searching and check-testing.
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58 * It also parses comments of the form [anything] or (anything).
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60 * [HGM] Parser extensively modified for bigger boards, Shogi-like syntax,
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61 * and unknow pieces. All pieces are now mandatory upper case, but can be
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62 * any letter A-Z. Files must be lower case (as before), but can run upto 'l'.
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63 * Ranks can be 0-9. The parser returns 0 for off-board files and ranks.
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64 * For an unknown piece (as mover or promotion piece) it returns
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65 * IllegalMove, like it does when the piece doesn't match.
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66 * Promotions can now also be appended Shogi-style, a bare '=' or '+',
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67 * and this is then returned as promotion character. The piece indicator
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68 * can be prefixed by a '+' to indicate it is a promoted piece.
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73 #define NO_CONSTRAINT -1
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76 #define UNPUT_BUF_SIZE YYLMAX
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79 /* yytext is probably a char*, but could be a char[]. yy_text is set
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80 in YY_DECL below, because if yytext is a char*, its value is not
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83 #else /*!FLEX_SCANNER*/
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84 /* yytext is definitely a char[], so yy_text can be set here, statically. */
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85 char *yy_text = (char *) yytext;
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91 #define YY_INPUT(buf, result, max_size) my_yy_input(buf, &result, max_size)
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94 int _yylex YY_PROTO((void)); \
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95 int yylex YY_PROTO((void)) \
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97 int result = _yylex(); \
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98 yy_text = (char *) yytext; \
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101 int _yylex YY_PROTO((void))
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109 /* The includes must be here, below the #undef input */
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114 # include <stdlib.h>
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115 # include <string.h>
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116 #else /* not STDC_HEADERS */
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118 # include <string.h>
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119 # else /* not HAVE_STRING_H */
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120 # include <strings.h>
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121 # endif /* not HAVE_STRING_H */
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122 #endif /* not STDC_HEADERS */
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125 # include <unistd.h>
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128 #if defined(_amigados)
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129 # include <errno.h>
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131 # include <fcntl.h> /* isatty() prototype */
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132 # endif /* HAVE_FCNTL_H */
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133 #endif /* defined(_amigados) */
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135 #include "common.h"
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136 #include "backend.h"
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137 #include "frontend.h"
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138 #include "parser.h"
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141 extern int PosFlags P((int));
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143 extern Board boards[MAX_MOVES];
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145 int yyskipmoves = FALSE;
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146 char currentMoveString[YYLMAX];
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147 #ifndef FLEX_SCANNER
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148 char unputBuffer[UNPUT_BUF_SIZE];
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149 int unputCount = 0;
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152 #ifdef FLEX_SCANNER
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153 void my_yy_input P((char *buf, int *result, int max_size));
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154 #else /*!FLEX_SCANNER*/
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155 static int input P((void));
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156 static void output P((int ch));
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157 static void unput P((int ch));
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158 int yylook P((void));
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159 int yyback P((int *, int));
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162 int yywrap P((void));
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163 extern void CopyBoard P((Board to, Board from));
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168 "+"?[A-Z][/]?[a-l][0-9][xX:-]?[a-l][0-9]((=?\(?[A-Z]\)?)|=)? {
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170 * Fully-qualified algebraic move, possibly with promotion
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172 int skip1 = 0, skip2 = 0, skip3 = 0, promoted = 0;
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177 if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
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179 if (yytext[0] == '+') skip1 = skip3 = promoted = 1; /* [HGM] Shogi promoted */
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182 if (yytext[1+skip1] == '/') skip1++;
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184 /* remove the [xX:-] */
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185 if ((yytext[3+skip1] == 'x') || (yytext[3+skip1] == 'X') ||
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186 (yytext[3+skip1] == '-') || (yytext[3+skip1] == ':')) skip2 = 1;
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188 currentMoveString[0] = yytext[1+skip1];
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189 currentMoveString[1] = yytext[2+skip1];
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190 currentMoveString[2] = yytext[3+skip1+skip2];
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191 currentMoveString[3] = yytext[4+skip1+skip2];
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192 currentMoveString[4] = NULLCHAR;
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194 if (appData.debugMode) {
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195 fprintf(debugFP, "Parser Qa1b2: yyleng=%d\n",
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199 if (yyleng-skip1-skip2 > 5) { char c;
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200 if (yytext[yyleng-1] == ')') {
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201 c = currentMoveString[4] = ToLower(yytext[yyleng-2]);
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203 c = currentMoveString[4] = ToLower(yytext[yyleng-1]);
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205 currentMoveString[5] = NULLCHAR;
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206 if(c != '=' && c != '+' && CharToPiece(c) == EmptySquare)
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207 return IllegalMove; /* [HGM] promotion to invalid piece */
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210 if (appData.debugMode) {
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211 fprintf(debugFP, "parser: %s\n", currentMoveString);
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213 /* [HGM] do not allow values beyond board size */
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214 if(currentMoveString[1] - ONE >= BOARD_HEIGHT ||
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215 currentMoveString[1] - ONE < 0 ||
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216 currentMoveString[0] - AAA >= BOARD_RGHT ||
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217 currentMoveString[3] - ONE >= BOARD_HEIGHT ||
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218 currentMoveString[3] - ONE < 0 ||
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219 currentMoveString[2] - AAA >= BOARD_RGHT ||
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220 currentMoveString[0] - AAA < BOARD_LEFT ||
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221 currentMoveString[2] - AAA < BOARD_LEFT )
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224 piece = boards[yyboardindex]
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225 [currentMoveString[1] - ONE][currentMoveString[0] - AAA];
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226 if(promoted) piece = (ChessSquare) (DEMOTED piece);
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227 c = PieceToChar(piece);
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228 if(c == '~') c = PieceToChar((ChessSquare) (DEMOTED piece));
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229 if (ToLower(yytext[skip3]) != ToLower(c))
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230 return (int) IllegalMove;
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232 result = LegalityTest(boards[yyboardindex],
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233 PosFlags(yyboardindex), EP_UNKNOWN,
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234 initialRights, /* [HGM] assume all castlings allowed */
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235 currentMoveString[1] - ONE,
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236 currentMoveString[0] - AAA,
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237 currentMoveString[3] - ONE,
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238 currentMoveString[2] - AAA,
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239 currentMoveString[4]);
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241 if (currentMoveString[4] == NULLCHAR &&
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242 (result == WhitePromotionKnight || result == BlackPromotionKnight ||
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243 result == WhitePromotionQueen || result == BlackPromotionQueen)) {
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244 currentMoveString[4] = PieceToChar(BlackQueen);
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245 currentMoveString[5] = NULLCHAR;
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248 return (int) result;
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251 [a-l][0-9][xX:-]?[a-l][0-9]((=?\(?[A-Za-z]\)?)|=)? {
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253 * Simple algebraic move, possibly with promotion
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254 * [HGM] Engine moves are received in this format, with lower-case promoChar!
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259 if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
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261 /* remove the [xX:-] */
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262 if ((yytext[2] == 'x') || (yytext[2] == 'X') ||
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263 (yytext[2] == '-') || (yytext[2] == ':')) skip = 1;
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265 currentMoveString[0] = yytext[0];
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266 currentMoveString[1] = yytext[1];
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267 currentMoveString[2] = yytext[2+skip];
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268 currentMoveString[3] = yytext[3+skip];
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269 currentMoveString[4] = NULLCHAR;
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271 if (yyleng-skip > 4) { char c;
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272 if (yytext[yyleng-1] == ')') {
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273 c = currentMoveString[4] = ToLower(yytext[yyleng-2]);
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275 c = currentMoveString[4] = ToLower(yytext[yyleng-1]);
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277 currentMoveString[5] = NULLCHAR;
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278 if(c != '=' && c != '+' && CharToPiece(c) == EmptySquare)
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279 return IllegalMove;
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282 /* [HGM] do not allow values beyond board size */
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283 if(currentMoveString[1] - ONE >= BOARD_HEIGHT ||
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284 currentMoveString[1] - ONE < 0 ||
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285 currentMoveString[0] - AAA >= BOARD_RGHT ||
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286 currentMoveString[3] - ONE >= BOARD_HEIGHT ||
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287 currentMoveString[3] - ONE < 0 ||
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288 currentMoveString[2] - AAA >= BOARD_RGHT ||
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289 currentMoveString[0] - AAA < BOARD_LEFT ||
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290 currentMoveString[2] - AAA < BOARD_LEFT )
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293 result = LegalityTest(boards[yyboardindex],
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294 PosFlags(yyboardindex), EP_UNKNOWN,
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295 initialRights, /* [HGM] assume all castlings allowed */
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296 currentMoveString[1] - ONE,
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297 currentMoveString[0] - AAA,
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298 currentMoveString[3] - ONE,
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299 currentMoveString[2] - AAA,
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300 currentMoveString[4]);
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302 if (currentMoveString[4] == NULLCHAR &&
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303 (result == WhitePromotionKnight || result == BlackPromotionKnight ||
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304 result == WhitePromotionQueen || result == BlackPromotionQueen)) {
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305 if(gameInfo.variant == VariantShatranj || gameInfo.variant == VariantCourier)
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306 currentMoveString[4] = PieceToChar(BlackFerz);
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308 currentMoveString[4] = PieceToChar(BlackQueen);
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309 currentMoveString[5] = NULLCHAR;
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312 return (int) result;
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315 [a-l][0-9]((=?\(?[A-Z]\)?)|=)? {
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317 * Pawn move, possibly with promotion
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319 DisambiguateClosure cl;
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320 int skip = 0; char c;
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322 if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
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324 /* remove the =() */
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325 if (yytext[2] == '=' && yytext[3] != NULLCHAR) skip++;
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326 if (yytext[2+skip] == '(') skip++;
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328 cl.pieceIn = WhiteOnMove(yyboardindex) ? WhitePawn : BlackPawn;
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330 cl.ffIn = yytext[0] - AAA;
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331 cl.rtIn = yytext[1] - ONE;
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332 cl.ftIn = yytext[0] - AAA;
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333 c = cl.promoCharIn = yytext[2+skip];
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335 /* [HGM] do not allow values beyond board size */
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336 if(cl.rtIn >= BOARD_HEIGHT ||
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338 cl.ffIn >= BOARD_RGHT ||
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339 cl.ftIn < BOARD_LEFT )
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342 if(c != '=' && c != '+' && c != NULLCHAR && CharToPiece(c) == EmptySquare)
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343 return IllegalMove;
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346 Disambiguate(boards[yyboardindex],
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347 PosFlags(yyboardindex), EP_UNKNOWN, &cl);
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349 currentMoveString[0] = cl.ff + AAA;
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350 currentMoveString[1] = cl.rf + ONE;
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351 currentMoveString[2] = cl.ft + AAA;
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352 currentMoveString[3] = cl.rt + ONE;
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353 currentMoveString[4] = cl.promoChar;
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354 currentMoveString[5] = NULLCHAR;
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356 return (int) cl.kind;
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360 (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."|=)? {
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362 * Pawn capture, possibly with promotion, possibly ambiguous
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364 DisambiguateClosure cl;
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365 int skip1 = 0, skip2 = 0; char c;
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367 if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
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369 /* remove trailing ep or e.p. (nonstandard PGN) */
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370 if (yytext[yyleng-1] == 'p') {
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372 yytext[yyleng] = NULLCHAR;
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373 } else if (yytext[yyleng-1] == '.') {
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375 yytext[yyleng] = NULLCHAR;
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378 /* remove the [xX:-] and =() */
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379 if ((yytext[1] == 'x') || (yytext[1] == 'X')
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380 || (yytext[1] == ':') || (yytext[1] == '-')) skip1 = 1;
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381 if (yytext[2+skip1] == '=' && yytext[3+skip1] != NULLCHAR) skip2++;
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382 if (yytext[2+skip1+skip2] == '(') skip2++;
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384 cl.pieceIn = WhiteOnMove(yyboardindex) ? WhitePawn : BlackPawn;
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386 cl.ffIn = yytext[0] - AAA;
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388 cl.ftIn = yytext[1+skip1] - AAA;
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389 c = cl.promoCharIn = yytext[2+skip1+skip2];
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391 /* [HGM] do not allow values beyond board size */
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392 if(cl.ffIn >= BOARD_RGHT ||
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393 cl.ffIn < BOARD_LEFT ||
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394 cl.ftIn >= BOARD_RGHT ||
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395 cl.ftIn < BOARD_LEFT )
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398 if(c != '=' && c != '+' && c != NULLCHAR && CharToPiece(c) == EmptySquare)
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399 return IllegalMove;
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401 Disambiguate(boards[yyboardindex],
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402 PosFlags(yyboardindex), EP_UNKNOWN, &cl);
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404 currentMoveString[0] = cl.ff + AAA;
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405 currentMoveString[1] = cl.rf + ONE;
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406 currentMoveString[2] = cl.ft + AAA;
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407 currentMoveString[3] = cl.rt + ONE;
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408 currentMoveString[4] = cl.promoChar;
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409 currentMoveString[5] = NULLCHAR;
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411 return (int) cl.kind;
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414 [a-l][xX:]?[a-l][0-9]((=?\(?[A-Z]\)?)|ep|"e.p."|=)? {
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416 * unambiguously abbreviated Pawn capture, possibly with promotion
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419 ChessMove result; char c;
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421 if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
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423 /* remove trailing ep or e.p. (nonstandard PGN) */
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424 if (yytext[yyleng-1] == 'p') {
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426 yytext[yyleng] = NULLCHAR;
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427 } else if (yytext[yyleng-1] == '.') {
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429 yytext[yyleng] = NULLCHAR;
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432 /* remove the [xX:-] */
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433 if ((yytext[1] == 'x') || (yytext[1] == 'X')
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434 || (yytext[1] == ':') || (yytext[1] == '-')) skip = 1;
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436 currentMoveString[0] = yytext[0];
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437 currentMoveString[2] = yytext[1+skip];
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438 currentMoveString[3] = yytext[2+skip];
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440 /* [HGM] do not allow values beyond board size */
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441 if(currentMoveString[0] - AAA >= BOARD_RGHT ||
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442 currentMoveString[3] - ONE >= BOARD_HEIGHT ||
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443 currentMoveString[3] - ONE < 0 ||
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444 currentMoveString[2] - AAA >= BOARD_RGHT ||
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445 currentMoveString[0] - AAA < BOARD_LEFT ||
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446 currentMoveString[2] - AAA < BOARD_LEFT )
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449 if (gameInfo.variant == VariantXiangqi && /* [HGM] In Xiangqi rank stays same */
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450 currentMoveString[0] != currentMoveString[2] ) {
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451 if (yytext[2+skip] == ONE) return (int) ImpossibleMove;
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452 currentMoveString[1] = yytext[2+skip];
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454 if (WhiteOnMove(yyboardindex)) {
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455 if (yytext[2+skip] == ONE) return (int) ImpossibleMove;
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456 currentMoveString[1] = yytext[2+skip] - 1;
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458 currentMoveString[1] = currentMoveString[3] + 1;
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459 if (currentMoveString[3] == ONE+BOARD_HEIGHT-1) return (int) ImpossibleMove;
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461 if (yyleng-skip > 3) {
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462 if (yytext[yyleng-1] == ')')
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463 c = currentMoveString[4] = ToLower(yytext[yyleng-2]);
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465 c = currentMoveString[4] = ToLower(yytext[yyleng-1]);
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466 currentMoveString[5] = NULLCHAR;
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467 if(c != '=' && c != '+' && CharToPiece(c) == EmptySquare)
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468 return IllegalMove;
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470 currentMoveString[4] = NULLCHAR;
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473 result = LegalityTest(boards[yyboardindex],
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474 PosFlags(yyboardindex), EP_UNKNOWN,
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475 initialRights, /* [HGM] assume all castlings allowed */
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476 currentMoveString[1] - ONE,
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477 currentMoveString[0] - AAA,
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478 currentMoveString[3] - ONE,
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479 currentMoveString[2] - AAA,
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480 currentMoveString[4]);
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482 if (currentMoveString[4] == NULLCHAR &&
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483 (result == WhitePromotionQueen || result == BlackPromotionQueen ||
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484 result == WhitePromotionKnight || result == BlackPromotionKnight)) {
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485 currentMoveString[4] = PieceToChar(BlackQueen);
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486 currentMoveString[5] = NULLCHAR;
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489 if (result != IllegalMove) return (int) result;
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491 /* Special case: improperly written en passant capture */
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492 if (WhiteOnMove(yyboardindex)) {
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493 if (currentMoveString[3] == '5') {
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494 currentMoveString[1] = '5';
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495 currentMoveString[3] = '6';
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497 return (int) IllegalMove;
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500 if (currentMoveString[3] == '4') {
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501 currentMoveString[1] = '4';
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502 currentMoveString[3] = '3';
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504 return (int) IllegalMove;
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508 result = LegalityTest(boards[yyboardindex],
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509 PosFlags(yyboardindex), EP_UNKNOWN,
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510 initialRights, /* [HGM] assume all castlings allowed */
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511 currentMoveString[1] - ONE,
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512 currentMoveString[0] - AAA,
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513 currentMoveString[3] - ONE,
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514 currentMoveString[2] - AAA,
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515 currentMoveString[4]);
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517 if (result == WhiteCapturesEnPassant || result == BlackCapturesEnPassant)
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518 return (int) result;
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520 return (int) IllegalMove;
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523 "+"?[A-Z][xX:-]?[a-l][0-9]=? {
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525 * piece move, possibly ambiguous
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527 DisambiguateClosure cl;
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528 int skip = 0, skip2 = 0, promoted = 0;
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530 if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
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532 if(yytext[0] == '+') promoted = skip = skip2 = 1;
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534 /* remove the [xX:-] */
\r
535 if ((yytext[1+skip] == 'x') || (yytext[1+skip] == 'X')
\r
536 || (yytext[1+skip] == ':') || (yytext[1+skip] == '-')) skip++;
\r
538 if (WhiteOnMove(yyboardindex)) {
\r
539 cl.pieceIn = CharToPiece(ToUpper(yytext[skip2]));
\r
541 cl.pieceIn = CharToPiece(ToLower(yytext[skip2]));
\r
543 if(promoted) cl.pieceIn = (ChessSquare) (PROMOTED cl.pieceIn);
\r
547 cl.rtIn = yytext[2+skip] - ONE;
\r
548 cl.ftIn = yytext[1+skip] - AAA;
\r
549 cl.promoCharIn = NULLCHAR;
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551 if(yyleng-skip > 3) /* [HGM] can have Shogi-style promotion */
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552 cl.promoCharIn = yytext[yyleng-1];
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554 if (appData.debugMode) {
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555 fprintf(debugFP, "Parser Qa1: yyleng=%d, %d(%d,%d)-(%d,%d) = %d (%c)\n",
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557 cl.pieceIn,cl.ffIn,cl.rfIn,cl.ftIn,cl.rtIn,cl.promoCharIn,cl.promoCharIn?cl.promoCharIn:' ');
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560 /* [HGM] but do not allow values beyond board size */
\r
561 if(cl.rtIn >= BOARD_HEIGHT ||
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563 cl.ftIn >= BOARD_RGHT ||
\r
564 cl.ftIn < BOARD_LEFT )
\r
567 Disambiguate(boards[yyboardindex],
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568 PosFlags(yyboardindex), EP_UNKNOWN, &cl);
\r
570 currentMoveString[0] = cl.ff + AAA;
\r
571 currentMoveString[1] = cl.rf + ONE;
\r
572 currentMoveString[2] = cl.ft + AAA;
\r
573 currentMoveString[3] = cl.rt + ONE;
\r
574 currentMoveString[4] = cl.promoChar;
\r
575 currentMoveString[5] = NULLCHAR;
\r
577 return (int) cl.kind;
\r
580 "+"?[A-Z][a-l0-9][xX:-]?[a-l][0-9]=? {
\r
582 * piece move with rank or file disambiguator
\r
584 DisambiguateClosure cl;
\r
585 int skip = 0, skip2 = 0; int promoted=0;
\r
587 if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
\r
589 if(yytext[0]=='+') promoted = skip = skip2 = 1;
\r
591 /* remove the [xX:-] */
\r
592 if ((yytext[2+skip] == 'x') || (yytext[2+skip] == 'X')
\r
593 || (yytext[2+skip] == ':') || (yytext[2+skip] == '-')) skip++;
\r
595 if (WhiteOnMove(yyboardindex)) {
\r
596 cl.pieceIn = CharToPiece(ToUpper(yytext[skip2]));
\r
598 cl.pieceIn = CharToPiece(ToLower(yytext[skip2]));
\r
600 if(promoted) cl.pieceIn = (ChessSquare) (PROMOTED cl.pieceIn);
\r
602 if (isalpha(yytext[1+skip2])) {
\r
604 cl.ffIn = yytext[1+skip2] - AAA;
\r
606 if(cl.ffIn >= BOARD_RGHT ||
\r
607 cl.ffIn < BOARD_LEFT ) return 0;
\r
609 cl.rfIn = yytext[1+skip2] - ONE;
\r
611 if(cl.rfIn >= BOARD_HEIGHT ||
\r
612 cl.rfIn < 0) return 0;
\r
614 cl.rtIn = yytext[3+skip] - ONE;
\r
615 cl.ftIn = yytext[2+skip] - AAA;
\r
616 cl.promoCharIn = NULLCHAR;
\r
618 if(yyleng-skip > 4) /* [HGM] can have Shogi-style promotion */
\r
619 cl.promoCharIn = yytext[yyleng-1];
\r
621 /* [HGM] do not allow values beyond board size */
\r
622 if(cl.rtIn >= BOARD_HEIGHT ||
\r
624 cl.ftIn >= BOARD_RGHT ||
\r
625 cl.ftIn < BOARD_LEFT )
\r
628 Disambiguate(boards[yyboardindex],
\r
629 PosFlags(yyboardindex), EP_UNKNOWN, &cl);
\r
631 currentMoveString[0] = cl.ff + AAA;
\r
632 currentMoveString[1] = cl.rf + ONE;
\r
633 currentMoveString[2] = cl.ft + AAA;
\r
634 currentMoveString[3] = cl.rt + ONE;
\r
635 currentMoveString[4] = cl.promoChar;
\r
636 currentMoveString[5] = NULLCHAR;
\r
638 return (int) cl.kind;
\r
641 000|0-0-0|ooo|OOO|o-o-o|O-O-O {
\r
642 int rf, ff, rt, ft;
\r
644 if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
\r
646 /* [HGM] all squares referenced to board edges in stead of absolute */
\r
647 if (WhiteOnMove(yyboardindex)) {
\r
648 if (boards[yyboardindex][0][(BOARD_WIDTH-1)>>1] == WhiteKing) {
\r
649 /* ICS wild castling */
\r
651 ff = (BOARD_WIDTH-1)>>1;
\r
656 ff = BOARD_WIDTH>>1;
\r
661 if (boards[yyboardindex][BOARD_HEIGHT-1][(BOARD_WIDTH-1)>>1] == BlackKing) {
\r
662 /* ICS wild castling */
\r
663 rf = BOARD_HEIGHT-1;
\r
664 ff = (BOARD_WIDTH-1)>>1;
\r
665 rt = BOARD_HEIGHT-1;
\r
668 rf = BOARD_HEIGHT-1;
\r
669 ff = BOARD_WIDTH>>1;
\r
670 rt = BOARD_HEIGHT-1;
\r
674 if(gameInfo.variant == VariantFischeRandom) {
\r
675 if (WhiteOnMove(yyboardindex)) {
\r
676 ff = initialRights[2];
\r
677 ft = initialRights[1];
\r
679 ff = initialRights[5];
\r
680 ft = initialRights[4];
\r
682 fprintf(debugFP, "Parser FRC long %d %d\n", ff, ft);
\r
683 if(ff < 0 || ft < 0) return 0;
\r
685 sprintf(currentMoveString, "%c%c%c%c",ff+AAA,rf+ONE,ft+AAA,rt+ONE);
\r
686 if (appData.debugMode) {
\r
687 fprintf(debugFP, "long castling %d %d\n", ff, ft);
\r
689 return (int) LegalityTest(boards[yyboardindex],
\r
690 PosFlags(yyboardindex), EP_UNKNOWN,
\r
691 castlingRights[yyboardindex], /* [HGM] use true castling rights */
\r
692 rf, ff, rt, ft, NULLCHAR);
\r
695 00|0-0|oo|OO|o-o|O-O {
\r
696 int rf, ff, rt, ft;
\r
698 if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
\r
700 if (WhiteOnMove(yyboardindex)) {
\r
701 if (boards[yyboardindex][0][(BOARD_WIDTH-1)>>1] == WhiteKing) {
\r
702 /* ICS wild castling */
\r
704 ff = (BOARD_WIDTH-1)>>1;
\r
709 ff = BOARD_WIDTH>>1;
\r
714 if (boards[yyboardindex][BOARD_HEIGHT-1][(BOARD_WIDTH-1)>>1] == BlackKing) {
\r
715 /* ICS wild castling */
\r
716 rf = BOARD_HEIGHT-1;
\r
717 ff = (BOARD_WIDTH-1)>>1;
\r
718 rt = BOARD_HEIGHT-1;
\r
721 rf = BOARD_HEIGHT-1;
\r
722 ff = BOARD_WIDTH>>1;
\r
723 rt = BOARD_HEIGHT-1;
\r
727 if(gameInfo.variant == VariantFischeRandom) {
\r
728 if (WhiteOnMove(yyboardindex)) {
\r
729 ff = initialRights[2];
\r
730 ft = initialRights[0];
\r
732 ff = initialRights[5];
\r
733 ft = initialRights[3];
\r
735 if (appData.debugMode) {
\r
736 fprintf(debugFP, "Parser FRC short %d %d\n", ff, ft);
\r
738 if(ff < 0 || ft < 0) return 0;
\r
740 sprintf(currentMoveString, "%c%c%c%c",ff+AAA,rf+ONE,ft+AAA,rt+ONE);
\r
741 if (appData.debugMode) {
\r
742 fprintf(debugFP, "short castling %d %d\n", ff, ft);
\r
745 return (int) LegalityTest(boards[yyboardindex],
\r
746 PosFlags(yyboardindex), EP_UNKNOWN,
\r
747 castlingRights[yyboardindex], /* [HGM] use true castling rights */
\r
748 rf, ff, rt, ft, NULLCHAR);
\r
751 [A-Z][@*][a-l][0-9] {
\r
752 /* Bughouse piece drop. No legality checking for now. */
\r
753 currentMoveString[1] = '@';
\r
754 currentMoveString[2] = yytext[2];
\r
755 currentMoveString[3] = yytext[3];
\r
756 currentMoveString[4] = NULLCHAR;
\r
758 if (appData.debugMode) {
\r
759 fprintf(debugFP, "Drop: %s\n", currentMoveString);
\r
761 /* [HGM] do not allow values beyond board size */
\r
762 if(currentMoveString[3] - ONE >= BOARD_HEIGHT ||
\r
763 currentMoveString[2] - AAA >= BOARD_WIDTH )
\r
766 if (WhiteOnMove(yyboardindex)) {
\r
767 currentMoveString[0] = ToUpper(yytext[0]);
\r
768 return (int) WhiteDrop;
\r
770 currentMoveString[0] = ToLower(yytext[0]);
\r
771 return (int) BlackDrop;
\r
776 if (WhiteOnMove(yyboardindex))
\r
777 return (int) BlackWins;
\r
779 return (int) WhiteWins;
\r
782 (([Ww](hite)?)|([Bb](lack)?))" "(([Rr]esign)|([Ff]orfeit))(s|ed)? {
\r
783 return (int) (ToUpper(yytext[0]) == 'W' ? BlackWins : WhiteWins);
\r
786 (([Ww](hite)?)|([Bb](lack)?))" "[Dd]isconnect(s|ed) {
\r
787 return (int) GameUnfinished;
\r
791 return (int) GameIsDrawn;
\r
795 return (int) GameIsDrawn;
\r
798 ([Cc]heck)?[Mm]ate {
\r
799 if (WhiteOnMove(yyboardindex))
\r
800 return (int) BlackWins;
\r
802 return (int) WhiteWins;
\r
806 if (WhiteOnMove(yyboardindex))
\r
807 return (int) BlackWins;
\r
809 return (int) WhiteWins;
\r
812 [Dd]raw(n)?(" "by)?(" "[Rr]epetition)|(" "[Aa]gree(d|ment)) {
\r
813 return (int) GameIsDrawn;
\r
816 [Dd]raw(n)?(" (".*")")? {
\r
817 return (int) GameIsDrawn;
\r
820 (([Ww](hite)?)|([Bb](lack)?))" "([Mm]ate(s|ed)?)|([Ww][io]n(s)?.*) {
\r
821 return (int) (ToUpper(yytext[0]) == 'W' ? WhiteWins : BlackWins);
\r
824 (([Ww](hite)?)|([Bb](lack)?))" "([Mm]ate(s|ed)?)|([Ll]os[tes]+.*) {
\r
825 return (int) (ToUpper(yytext[0]) == 'W' ? BlackWins : WhiteWins);
\r
828 ("{"[^\}\n]*"} ")?(1-0|"1 - 0"|"1/0"|"1 / 0"|"1:0"|"1 : 0")(" (".*")"|" {".*"}")? {
\r
829 return (int) WhiteWins;
\r
832 ("{"[^\}\n]*"} ")?(0-1|"0 - 1"|"0/1"|"0 / 1"|"0:1"|"0 : 1")(" (".*")"|" {".*"}")? {
\r
833 return (int) BlackWins;
\r
836 ("{"[^\}\n]*"} ")?("1/2"|"1 / 2")(" "?[-:]" "?("1/2"|"1 / 2"))?(" (".*")"|" {".*"}")? {
\r
837 return (int) GameIsDrawn;
\r
840 ("{"[^\}\n]*"} ")?"*"(" (".*")"|" {".*"}")? {
\r
841 return (int) GameUnfinished;
\r
844 [1-9][0-9]*/"."?[ \t\n]*[a-lNnPpRrBQqKACFEWDGHOo] {
\r
846 if ((yyleng == 1) && (yytext[0] == '1'))
\r
847 return (int) MoveNumberOne;
\r
850 \([0-9]+:[0-9][0-9](\.[0-9]+)?\)|\{[0-9]+:[0-9][0-9](\.[0-9]+)?\} {
\r
851 /* elapsed time indication, e.g. (0:12) or {10:21.071} */
\r
852 return (int) ElapsedTime;
\r
856 /* position diagram enclosed in [-- --] */
\r
857 return (int) PositionDiagram;
\r
860 ^"{--------------"\n[^\}]*\n"--------------}"$ {
\r
861 /* position diagram enclosed in {-- --} */
\r
862 return (int) PositionDiagram;
\r
865 \[[ \t\n]*[A-Za-z0-9][A-Za-z0-9_+#=-]*[ \t\n]*\"[^"]*\"[ \t\n]*\] {
\r
866 return (int) PGNTag;
\r
869 [Gg](nu|NU)" "?[Cc](hess|HESS).*[Gg](ame|AME) {
\r
870 return (int) GNUChessGame;
\r
873 ^[#;%]" "[^ ]*(" game file"|" position file").*$ {
\r
874 return (int) XBoardGame;
\r
877 \$[0-9]+ { /* numeric annotation glyph */
\r
881 \{[^\}]*\} { /* anything in {} */
\r
882 return (int) Comment;
\r
885 ;.*$ { /* ; to end of line */
\r
886 return (int) Comment;
\r
889 \[[^\]]*\] { /* anything in [] */
\r
890 return (int) Comment;
\r
893 \([^()]*(\([^()]*\)[^()]*)+[^()]*\) { /* nested () */
\r
894 return (int) Comment;
\r
897 \([^)][^)]+\) { /* >=2 chars in () */
\r
898 return (int) Comment;
\r
901 ^[-a-zA-Z0-9]+:" ".*(\n[ \t]+.*)* {
\r
902 /* Skip mail headers */
\r
906 /* Skip random words */
\r
910 /* Skip everything else */
\r
916 static char *StringToLex;
\r
918 #ifndef FLEX_SCANNER
\r
919 static FILE *lexFP;
\r
925 if (StringToLex != NULL) {
\r
926 ret = *StringToLex;
\r
927 if (ret == NULLCHAR)
\r
931 } else if (unputCount > 0) {
\r
932 ret = unputBuffer[--unputCount];
\r
934 ret = fgetc(lexFP);
\r
944 * Return offset of next pattern within current file
\r
948 int offset = ftell(lexFP) - unputCount;
\r
956 static void output(ch)
\r
959 fprintf(stderr, "PARSER BUG: unmatched character '%c' (0%o)\n",
\r
963 static void unput(ch)
\r
966 if (ch == 0) return;
\r
967 if (StringToLex != NULL) {
\r
970 if (unputCount >= UNPUT_BUF_SIZE)
\r
971 fprintf(stderr, "PARSER BUG: unput buffer overflow '%c' (0%o)\n",
\r
973 unputBuffer[unputCount++] = ch;
\r
977 /* Get ready to lex from a new file. Kludge below sticks
\r
978 an artificial newline at the front of the file, which the
\r
979 above grammar ignores, but which makes ^ at start of pattern
\r
980 match at the real start of the file.
\r
986 StringToLex = NULL;
\r
988 unput('\n'); /* kludge */
\r
991 /* Get ready to lex from a string. ^ at start of pattern WON'T
\r
992 match at the start of the string!
\r
1001 #endif /*!FLEX_SCANNER*/
\r
1003 #ifdef FLEX_SCANNER
\r
1004 void my_yy_input(buf, result, max_size)
\r
1011 if (StringToLex != NULL) {
\r
1013 while (*StringToLex != NULLCHAR) {
\r
1014 *buf++ = *StringToLex++;
\r
1020 count = fread(buf, 1, max_size, yyin);
\r
1022 *result = YY_NULL;
\r
1030 static YY_BUFFER_STATE my_file_buffer = NULL;
\r
1033 Return offset of next pattern in the current file.
\r
1037 int pos = yy_c_buf_p - yy_current_buffer->yy_ch_buf;
\r
1039 return(ftell(yy_current_buffer->yy_input_file) -
\r
1040 yy_n_chars + pos);
\r
1047 if (my_file_buffer != NULL)
\r
1048 yy_delete_buffer(my_file_buffer);
\r
1050 my_file_buffer = yy_create_buffer(stdin, YY_BUF_SIZE);
\r
1051 yy_switch_to_buffer(my_file_buffer);
\r
1057 if (my_file_buffer != NULL)
\r
1058 yy_delete_buffer(my_file_buffer);
\r
1059 StringToLex = NULL;
\r
1060 my_file_buffer = yy_create_buffer(f, YY_BUF_SIZE);
\r
1061 yy_switch_to_buffer(my_file_buffer);
\r
1063 #endif /*FLEX_SCANNER*/
\r
1070 /* Parse a move from the given string s */
\r
1071 /* ^ at start of pattern WON'T work here unless using flex */
\r
1072 ChessMove yylexstr(boardIndex, s)
\r
1077 char *oldStringToLex;
\r
1078 #ifdef FLEX_SCANNER
\r
1079 YY_BUFFER_STATE buffer, oldBuffer;
\r
1082 yyboardindex = boardIndex;
\r
1083 oldStringToLex = StringToLex;
\r
1085 #ifdef FLEX_SCANNER
\r
1086 buffer = yy_create_buffer(stdin, YY_BUF_SIZE);
\r
1087 oldBuffer = YY_CURRENT_BUFFER;
\r
1088 yy_switch_to_buffer(buffer);
\r
1089 #endif /*FLEX_SCANNER*/
\r
1091 ret = (ChessMove) yylex();
\r
1093 #ifdef FLEX_SCANNER
\r
1094 if (oldBuffer != NULL)
\r
1095 yy_switch_to_buffer(oldBuffer);
\r
1096 yy_delete_buffer(buffer);
\r
1097 #endif /*FLEX_SCANNER*/
\r
1098 StringToLex = oldStringToLex;
\r