+++ /dev/null
-/*
- * parser.c --
- *
- * Copyright 2011, 2012, 2013, 2014, 2015, 2016 Free Software Foundation, Inc.
- * ------------------------------------------------------------------------
- *
- * 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. */
-
-#include "config.h"
-#include <stdio.h>
-#include <stdlib.h>
-#include <ctype.h>
-#include <string.h>
-#include "common.h"
-#include "backend.h"
-#include "frontend.h"
-#include "parser.h"
-#include "moves.h"
-
-
-extern Board boards[MAX_MOVES];
-extern int PosFlags(int nr);
-int yyboardindex;
-int yyskipmoves = FALSE;
-char currentMoveString[4096]; // a bit ridiculous size?
-char *yy_text;
-
-#define PARSEBUFSIZE 10000
-
-static FILE *inputFile;
-static char *inPtr, *parsePtr, *parseStart;
-static char inputBuf[PARSEBUFSIZE];
-static char yytext[PARSEBUFSIZE];
-static char fromString = 0, lastChar = '\n';
-
-#define NOTHING 0
-#define NUMERIC 1
-#define ALPHABETIC 2
-#define BADNUMBER (-2000000000)
-
-#define XCO 0
-#define YCO 53
-#define PIECE 94
-#define MISC 155
-#define JIS 200
-
-unsigned char kanjiTab[] = {
- '1', 0357, 0274, 0221, // kanji notation for arabic digits
- '2', 0357, 0274, 0222,
- '3', 0357, 0274, 0223,
- '4', 0357, 0274, 0224,
- '5', 0357, 0274, 0225,
- '6', 0357, 0274, 0226,
- '7', 0357, 0274, 0227,
- '8', 0357, 0274, 0230,
- '9', 0357, 0274, 0231,
- 'x', 0345, 0220, 0214,
- 's', 0345, 0205, 0210, // sente
- 'g', 0345, 0276, 0214, // gote
- '-', 0346, 0212, 0225, // resign
- 0,
- 'a', 0344, 0270, 0200, // in reality these are numbers in Japanese a=1, b=2 etc.
- 'b', 0344, 0272, 0214,
- 'c', 0344, 0270, 0211,
- 'd', 0345, 0233, 0233,
- 'e', 0344, 0272, 0224,
- 'f', 0345, 0205, 0255,
- 'g', 0344, 0270, 0203,
- 'h', 0345, 0205, 0253,
- 'i', 0344, 0271, 0235,
- ' ', 0343, 0200, 0200,
- 0,
- 'K', 0347, 0216, 0211, // piece names
- 'K', 0347, 0216, 0213,
- 'G', 0351, 0207, 0221,
- 'S', 0351, 0212, 0200,
- 'R', 0351, 0243, 0233,
- 'B', 0350, 0247, 0222,
- 'N', 0346, 0241, 0202,
- 'L', 0351, 0246, 0231,
- 'P', 0346, 0255, 0251,
- 'r', 0351, 0276, 0215,
- 'b', 0351, 0246, 0254,
- 'p', 0343, 0201, 0250,
- 'r', 0347, 0253, 0234,
- '+', 0346, 0210, 0220,
- 'G', 0, 0, 0,
- 0,
- '+', 0346, 0210, 0220, // helper
- '@', 0346, 0211, 0223,
- 'p', 0346, 0211, 0213, // player
- ':', 0357, 0274, 0232,
- '-', 0344, 0272, 0206,
- 'f', 0344, 0270, 0212,
- 's', 0345, 0257, 0204,
- 'b', 0345, 0274, 0225,
- 'r', 0345, 0267, 0246,
- 'l', 0345, 0217, 0263,
- 'v', 0347, 0233, 0264,
- 0,
- // shift-JIS
- '1', 0202, 0120, 0,
- '2', 0202, 0121, 0,
- '3', 0202, 0122, 0,
- '4', 0202, 0123, 0,
- '5', 0202, 0124, 0,
- '6', 0202, 0125, 0,
- '7', 0202, 0126, 0,
- '8', 0202, 0127, 0,
- '9', 0202, 0130, 0,
- 'x', 0223, 0257, 0,
- 's', 0220, 0346, 0,
- 'g', 0214, 0343, 0,
- '-', 0223, 0212, 0,
- 0,
- 'a', 0210, 0352, 0,
- 'b', 0223, 0361, 0,
- 'c', 0216, 0117, 0,
- 'd', 0216, 0154, 0,
- 'e', 0214, 0334, 0,
- 'f', 0230, 0132, 0,
- 'g', 0216, 0265, 0,
- 'h', 0224, 0252, 0,
- 'i', 0213, 0343, 0,
- ' ', 0201, 0100, 0,
- 0,
- 'K', 0213, 0312, 0,
- 'K', 0213, 0312, 0,
- 'G', 0213, 0340, 0,
- 'S', 0213, 0342, 0,
- 'R', 0224, 0362, 0,
- 'B', 0212, 0160, 0,
- 'N', 0214, 0152, 0,
- 'L', 0215, 0201, 0,
- 'P', 0225, 0340, 0,
- 'r', 0227, 0264, 0,
- 'b', 0224, 0156, 0,
- 'p', 0202, 0306, 0,
- 'r', 0227, 0263, 0,
- '+', 0220, 0254, 0,
- 'G', 0, 0, 0,
- 0,
- '+', 0220, 0254, 0,
- '@', 0221, 0305, 0,
-// 'p', 0214, 0343, 0,
- 'p', 0216, 0350, 0,
- ':', 0201, 0106, 0,
- '-', 0227, 0271, 0,
- 'f', 0217, 0343, 0,
- 's', 0212, 0361, 0,
- 'b', 0210, 0370, 0,
- 'r', 0215, 0266, 0,
- 'l', 0211, 0105, 0,
- 'v', 0222, 0274, 0,
- 0,
-
-};
-
-int NextUnit P((char **p));
-
-int kifu = 0;
-
-char
-GetKanji (char **p, int start)
-{
- unsigned char *q = *(unsigned char **) p;
- int i;
-
- if((*q & 0x80) == 0) return 0; // plain ASCII, refuse to parse
- if((**p & 0xC0) == 0x80) { // this is an illegal starting code in utf-8, so assume shift-JIS
- for(i=start+JIS; kanjiTab[i]; i+=4) {
- if(q[0] == kanjiTab[i+1] && q[1] == kanjiTab[i+2]) {
- (*p) += 2; kifu = 0x80;
- return kanjiTab[i];
- }
- }
- (*p) += (kifu ? 2 : 1); // assume this is an unrecognized kanji when reading kif files
- return 0;
- }
-
- for(i=start; kanjiTab[i]; i+=4) {
- if(q[0] == kanjiTab[i+1] && q[1] == kanjiTab[i+2] && q[2] == kanjiTab[i+3]) {
- (*p) += 3; kifu = 0x80;
- return kanjiTab[i];
- }
- }
-
- if((q[0] & 0xE0) == 0xC0 && (q[1] & 0xC0) == 0x80) (*p) += 2; else // for now skip unrecognized utf-8 characters
- if((q[0] & 0xF0) == 0xE0 && (q[1] & 0xC0) == 0x80 && (q[2] & 0xC0) == 0x80) (*p) += 3; else
- if((q[0] & 0xF8) == 0xF0 && (q[1] & 0xC0) == 0x80 && (q[2] & 0xC0) == 0x80 && (q[3] & 0xC0) == 0x80) (*p) += 4;
- else if(**p & 0x80) return -1; // not valid utf-8
-
- return 0; // unrecognized but valid kanji (skipped), or plain ASCII
-}
-
-int
-KifuMove (char **p)
-{
- static char buf[MSG_SIZ];
- char *ptr = buf+3, *q, k;
- int wom = quickFlag ? quickFlag&1 : WhiteOnMove(yyboardindex);
- k = GetKanji(p, XCO);
- if(k < 0) { (*p)++; return Nothing; } // must try shift-JIS here
- if(k >= '1' && k <= '9') {
- buf[0] = k; buf[1] = GetKanji(p, YCO); // to-square coords
- } else if(k == 'x') {
- if(GetKanji(p, YCO) != ' ') (*p) -= 3; // skip spacer kanji after recapture
- } else if((k == 's' || k == 'g') && GetKanji(p, MISC) == 'p' && GetKanji(p, MISC) == ':') { // player name
- snprintf(yytext, MSG_SIZ, "[%s \"", k == 's' ? "White" : "Black"); // construct PGN tag
- for(q=yytext+8; **p && **p != '\n' && **p != '\r' && q < yytext + MSG_SIZ; ) *q++ = *(*p)++;
- strcpy(q, "\"]\n"); parseStart = yytext; lastChar = '\n';
- return PGNTag;
- } else if(k == '-' && GetKanji(p, MISC) == '-') { // resign
- int res;
- parseStart = yytext;
- if(wom)
- res = BlackWins, strcpy(yytext, "{sente resigns} 0-1");
- else res = WhiteWins, strcpy(yytext, "{gote resigns} 1-0");
- return res;
- } else {
- while(**p && **p != '\n') (*p)++; // unrecognized Japanese kanji: skip to end of line
- return Nothing;
- }
- buf[3] = GetKanji(p, PIECE); // piece ID
- if(buf[3] == '+') buf[2] = '+', buf[3] = GetKanji(p, PIECE); // +N, +L, +S
- k = GetKanji(p, MISC);
- if(k == '@') { // drop move
- buf[4] = '@', buf[5] = buf[0], buf[6] = buf[1]; buf[7] = NULLCHAR;
- if(appData.debugMode) fprintf(debugFP, "kifu drop %s\n", ptr);
- return NextUnit(&ptr);
- }
-
- kifu = 0x80;
- do { // read disambiguation (and promotion) kanji
- switch(k) {
- case '+': kifu |= 1; break;
- case 'f': kifu |= 2; break;
- case 'b': kifu |= 4; break;
- case 's': kifu |= 8; break;
- case 'l': kifu |= 0x10; break;
- case 'r': kifu |= 0x20; break;
- case 'v': kifu |= 0x40; break;
- }
- } while(k = GetKanji(p, MISC));
-
- if(**p == '(' && (*p)[3] == ')') { // kif disambiguation
- buf[4] = (*p)[1]; buf[5] = (*p)[2] + 'a' - '1'; buf[6] = buf[0]; buf[7] = buf[1]; buf[8] = (kifu & 1)*'+'; buf[9] = NULLCHAR;
- (*p) += 4; ptr++; // strip off piece name if we know full from-square
- if(appData.debugMode) fprintf(debugFP, "kifu move %s\n", ptr);
- return NextUnit(&ptr);
- } else { // kif2
- char *q = buf+4;
- if(islower(buf[3])) // kludge: kanji for promoted types translate as lower case
- buf[3] += 'A' - 'a', buf[2] = '+', ptr--; // so prefix with '+'
- if(kifu * ~1) { // disambiguation was given, and thus is probably needed
- if(buf[3] != 'B' && buf[3] != 'R') { // stepper, so distance must be <= 1 (N or L never need vertical disambiguation!)
- if(kifu & 0x10) *q++ = buf[0] - (wom ? -1 : 1); // translate left/right/straight to PSN file disambiguators
- if(kifu & 0x20) *q++ = buf[0] + (wom ? -1 : 1);
- if(kifu & 0x40) *q++ = buf[0], kifu |= 2; // kludge: 'straight' only needs disambiguation if forward!
- if(kifu & 2) *q++ = buf[1] + (wom ? -1 : 1); // translate forward/backward/sideway to PSN rank disambiguators
- if(kifu & 4) *q++ = buf[1] - (wom ? -1 : 1);
- if(kifu & 8) *q++ = buf[1];
- } // for B, R, +B and +R it gets ugly, as we cannot deduce the distance, and the Disambiguate callback has to directly look at 'kifu'
- }
- *q++ = buf[0]; *q++ = buf[1]; *q++ = (kifu & 1)*'+'; *q = NULLCHAR;
- if(appData.debugMode) fprintf(debugFP, "kif2 move %s\n", ptr);
- return NextUnit(&ptr);
- }
-}
-
-int
-ReadLine ()
-{ // Read one line from the input file, and append to the buffer
- char c, *start = inPtr;
- if(fromString) return 0; // parsing string, so the end is a hard end
- if(!inputFile) return 0;
- while((c = fgetc(inputFile)) != EOF) {
- *inPtr++ = c;
- if(c == '\n') { *inPtr = NULLCHAR; return 1; }
- if(inPtr - inputBuf > PARSEBUFSIZE-2) inPtr--; //prevent crash on overflow
- }
- if(inPtr == start) return 0;
- *inPtr++ = '\n', *inPtr = NULLCHAR; // repair missing linefeed at EOF
- return 1;
-}
-
-int
-Scan (char c, char **p)
-{ // line-spanning skip to mentioned character or EOF
- do {
- while(**p) if(*(*p)++ == c) return 0;
- } while(ReadLine());
- // no closing bracket; force match for entire rest of file.
- return 1;
-}
-
-int
-SkipWhite (char **p)
-{ // skip spaces tabs and newlines; return 1 if anything was skipped
- char *start = *p;
- do{
- while(**p == ' ' || **p == '\t' || **p == '\n' || **p == '\r') (*p)++;
- } while(**p == NULLCHAR && ReadLine()); // continue as long as ReadLine reads something
- return *p != start;
-}
-
-static inline int
-Match (char *pattern, char **ptr)
-{
- char *p = pattern, *s = *ptr;
- while(*p && (*p == *s++ || s[-1] == '\r' && *p--)) p++;
- if(*p == 0) {
- *ptr = s;
- return 1;
- }
- return 0; // no match, no ptr update
-}
-
-static inline int
-Word (char *pattern, char **p)
-{
- if(Match(pattern, p)) return 1;
- if(*pattern >= 'a' && *pattern <= 'z' && *pattern - **p == 'a' - 'A') { // capitalized
- (*p)++;
- if(Match(pattern + 1, p)) return 1;
- (*p)--;
- }
- return 0;
-}
-
-int
-Verb (char *pattern, char **p)
-{
- int res = Word(pattern, p);
- if(res && !Match("s", p)) Match("ed", p); // eat conjugation suffix, if any
- return res;
-}
-
-int
-Number (char **p)
-{
- int val = 0;
- if(**p < '0' || **p > '9') return BADNUMBER;
- while(**p >= '0' && **p <= '9') {
- val = 10*val + *(*p)++ - '0';
- }
- return val;
-}
-
-int
-RdTime (char c, char **p)
-{
- char *start = ++(*p), *sec; // increment *p, as it was pointing to the opening ( or {
- if(Number(p) == BADNUMBER) return 0;
- sec = *p;
- if(Match(":", p) && Number(p) != BADNUMBER && *p - sec == 3) { // well formed
- sec = *p;
- if(Match(".", p) && Number(p) != BADNUMBER && *(*p)++ == c) return 1; // well-formed fraction
- *p = sec;
- if(*(*p)++ == c) return 1; // matching bracket without fraction
- }
- *p = start; // failure
- return 0;
-}
-
-char
-PromoSuffix (char **p)
-{
- char *start = *p;
- if(**p == ' ') return NULLCHAR; // common case, test explicitly for speed
- if(**p == 'e' && (Match("ep", p) || Match("e.p.", p))) { *p = start; return NULLCHAR; } // non-compliant e.p. suffix is no promoChar!
- if(**p == '+' && IS_SHOGI(gameInfo.variant)) { (*p)++; return '+'; }
- if(**p == '=' || (gameInfo.variant == VariantSChess) && **p == '/') (*p)++; // optional = (or / for Seirawan gating)
- if(**p == '(' && (*p)[2] == ')' && isalpha( (*p)[1] )) { (*p) += 3; return ToLower((*p)[-2]); }
- if(isalpha(**p) && **p != 'x') return ToLower(*(*p)++); // reserve 'x' for multi-leg captures?
- if(*p != start) return **p == '+' ? *(*p)++ : '='; // must be the optional = (or =+)
- return NULLCHAR; // no suffix detected
-}
-
-int
-NextUnit (char **p)
-{ // Main parser routine
- int coord[4], n, result, piece, i;
- char type[4], promoted, separator, slash, *oldp, *commentEnd, c;
- int wom = quickFlag ? quickFlag&1 : WhiteOnMove(yyboardindex);
-
- // ********* try white first, because it is so common **************************
- if(**p == ' ' || **p == '\n' || **p == '\t') { parseStart = (*p)++; return Nothing; }
-
-
- if(**p == NULLCHAR) { // make sure there is something to parse
- if(fromString) return 0; // we are parsing string, so the end is really the end
- *p = inPtr = parseStart = inputBuf;
- if(!ReadLine()) return 0; // EOF
- } else if(inPtr > inputBuf + PARSEBUFSIZE/2) { // buffer fills up with already parsed stuff
- char *q = *p, *r = inputBuf;
- while(*r++ = *q++);
- *p = inputBuf; inPtr = r - 1;
- }
- parseStart = oldp = *p; // remember where we begin
-
- // ********* attempt to recognize a SAN move in the leading non-blank text *****
- piece = separator = promoted = slash = n = 0;
- for(i=0; i<4; i++) coord[i] = -1, type[i] = NOTHING;
- if(**p & 0x80) return KifuMove(p); // non-ascii. Could be some kanj notation for Shogi or Xiangqi
- if(**p == '+') (*p)++, promoted++;
- if(**p >= 'a' && **p <= 'z' && (*p)[1]== '@') piece =*(*p)++ + 'A' - 'a'; else
- if(**p >= 'A' && **p <= 'Z') {
- static char s[] = SUFFIXES;
- char *q;
- piece = *(*p)++; // Note we could test for 2-byte non-ascii names here
- if(q = strchr(s, **p)) (*p)++, piece += 64*(q - s + 1);
- if(**p == '/') slash = *(*p)++;
- }
- while(n < 4) {
- if(**p >= 'a' && **p < 'x') coord[n] = *(*p)++ - 'a', type[n++] = ALPHABETIC;
- else if((i = Number(p)) != BADNUMBER) coord[n] = i, type[n++] = NUMERIC;
- else break;
- if(n == 2 && type[0] == type[1]) { // if two identical types, the opposite type in between must have been missing
- type[2] = type[1]; coord[2] = coord[1];
- type[1] = NOTHING; coord[1] = -1; n++;
- }
- }
- // we always get here, and might have read a +, a piece, and upto 4 potential coordinates
- if(n <= 2) { // could be from-square or disambiguator, when -:xX follow, or drop with @ directly after piece, but also to-square
- if(**p == '-' || **p == ':' || **p == 'x' || **p == 'X' || // these cannot be move suffix, so to-square must follow
- (**p == '@' || **p == '*') && n == 0 && !promoted && piece) { // P@ must also be followed by to-square
- separator = *(*p)++;
- if(n == 1) coord[1] = coord[0]; // must be disambiguator, but we do not know which yet
- n = 2;
- while(n < 4) { // attempt to read to-square
- if(**p >= 'a' && **p < 'x') coord[n] = *(*p)++ - 'a', type[n++] = ALPHABETIC;
- else if((i = Number(p)) != BADNUMBER) coord[n] = i, type[n++] = NUMERIC;
- else break;
- }
- } else if((**p == '+' || **p == '=') && n == 1 && piece && type[0] == NUMERIC) { // can be traditional Xiangqi notation
- separator = *(*p)++;
- n = 2;
- if((i = Number(p)) != BADNUMBER) coord[n] = i, type[n++] = NUMERIC;
- } else if(n == 2) { // only one square mentioned, must be to-square
- while(n < 4) { coord[n] = coord[n-2], type[n] = type[n-2], coord[n-2] = -1, type[n-2] = NOTHING; n++; }
- }
- } else if(n == 3 && type[1] != NOTHING) { // must be hyphenless disambiguator + to-square
- for(i=3; i>0; i--) coord[i] = coord[i-1], type[i] = type[i-1]; // move to-square to where it belongs
- type[1] = NOTHING; // disambiguator goes in first two positions
- n = 4;
- }
- // we always get here; move must be completely read now, with to-square coord(s) at end
- if(n == 3) { // incomplete to-square. Could be Xiangqi traditional, or stuff like fxg
- if(piece && type[1] == NOTHING && type[0] == NUMERIC && type[2] == NUMERIC &&
- (separator == '+' || separator == '=' || separator == '-')) {
- // Xiangqi traditional
-
- return ImpossibleMove; // for now treat as invalid
- }
- // fxg stuff, but also things like 0-0, 0-1 and 1-0
- if(!piece && type[1] == NOTHING && type[0] == ALPHABETIC && type[2] == ALPHABETIC
- && (coord[0] != 14 || coord[2] != 14) /* reserve oo for castling! */ ) {
- piece = 'P'; n = 4; // kludge alert: fake full to-square
- }
- } else if(n == 1 && type[0] == NUMERIC && coord[0] > 1) { while(**p == '.') (*p)++; return Nothing; } // fast exit for move numbers
- if(n == 4 && type[2] != type[3] && // we have a valid to-square (kludge: type[3] can be NOTHING on fxg type move)
- (piece || !promoted) && // promoted indicator only valid on named piece type
- (type[2] == ALPHABETIC || IS_SHOGI(gameInfo.variant))) { // in Shogi also allow alphabetic rank
- DisambiguateClosure cl;
- int fromX, fromY, toX, toY;
-
- if(slash && (!piece || type[1] == NOTHING)) goto badMove; // slash after piece only in ICS long format
- if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
-
- if(type[2] == NUMERIC) { // alpha-rank
- coord[2] = BOARD_RGHT - BOARD_LEFT - coord[2];
- coord[3] = BOARD_HEIGHT - coord[3];
- if(coord[0] >= 0) coord[0] = BOARD_RGHT - BOARD_LEFT - coord[0];
- if(coord[1] >= 0) coord[1] = BOARD_HEIGHT - coord[1];
- }
- toX = cl.ftIn = (currentMoveString[2] = coord[2] + 'a') - AAA;
- toY = cl.rtIn = (currentMoveString[3] = coord[3] + '0') - ONE;
- if(type[3] == NOTHING) cl.rtIn = -1; // for fxg type moves ask for toY disambiguation
- else if(toY >= BOARD_HEIGHT || toY < 0) return ImpossibleMove; // vert off-board to-square
- if(toX < BOARD_LEFT || toX >= BOARD_RGHT) return ImpossibleMove;
- if(piece) {
- cl.pieceIn = CharToPiece(wom ? piece : piece + 'a' - 'A');
- if(cl.pieceIn == EmptySquare) return ImpossibleMove; // non-existent piece
- if(promoted) cl.pieceIn = (ChessSquare) (CHUPROMOTED(cl.pieceIn));
- } else cl.pieceIn = EmptySquare;
- if(separator == '@' || separator == '*') { // drop move. We only get here without from-square or promoted piece
- fromY = DROP_RANK; fromX = cl.pieceIn;
- currentMoveString[0] = piece;
- currentMoveString[1] = '@';
- currentMoveString[4] = NULLCHAR;
- return LegalityTest(boards[yyboardindex], PosFlags(yyboardindex)&~F_MANDATORY_CAPTURE, fromY, fromX, toY, toX, NULLCHAR);
- }
- if(type[1] == NOTHING && type[0] != NOTHING) { // there is a disambiguator
- if(type[0] != type[2]) coord[0] = -1, type[1] = type[0], type[0] = NOTHING; // it was a rank-disambiguator
- }
- if( type[1] != type[2] && // means fromY is of opposite type as ToX, or NOTHING
- (type[0] == NOTHING || type[0] == type[2]) ) { // well formed
- int suffix = 7;
- fromX = (currentMoveString[0] = coord[0] + 'a') - AAA;
- fromY = (currentMoveString[1] = coord[1] + '0') - ONE;
- currentMoveString[4] = cl.promoCharIn = PromoSuffix(p);
- currentMoveString[5] = NULLCHAR;
- if(**p == 'x' && !cl.promoCharIn) { // other leg follows
- char *q = *p;
- int x = *++*p, y;
- ++*p; y = Number(p);
- if(**p == '-' || **p == 'x') { // 3-leg move!
- currentMoveString[7] = (kill2X = toX) + AAA; // what we thought was to-square is in fact 1st kill-square of two
- currentMoveString[8] = (kill2Y = toY) + ONE; // append it after 2nd kill-square
- toX = x - AAA; // kludge alert: this will become 2nd kill square
- toY = y + '0' - ONE;
- suffix += 2;
- } else *p = q; // 2-leg move, rewind to leave reading of 2nd leg to code below
- }
- if(!cl.promoCharIn && (**p == '-' || **p == 'x')) { // Lion-type multi-leg move
- currentMoveString[5] = (killX = toX) + AAA; // what we thought was to-square is in fact kill-square
- currentMoveString[6] = (killY = toY) + ONE; // append it as suffix behind long algebraic move
- currentMoveString[4] = ';';
- currentMoveString[suffix+1] = NULLCHAR;
- // read new to-square (VERY non-robust! Assumes correct (non-alpha-rank) syntax, and messes up on errors)
- toX = cl.ftIn = (currentMoveString[2] = *++*p) - AAA; ++*p;
- toY = cl.rtIn = (currentMoveString[3] = Number(p) + '0') - ONE;
- currentMoveString[suffix] = cl.promoCharIn = PromoSuffix(p);
- }
- if(type[0] != NOTHING && type[1] != NOTHING && type[3] != NOTHING) { // fully specified.
- ChessSquare realPiece = boards[yyboardindex][fromY][fromX];
- // Note that Disambiguate does not work for illegal moves, but flags them as impossible
- if(piece) { // check if correct piece indicated
- if(PieceToChar(realPiece) == '~') realPiece = (ChessSquare) (DEMOTED(realPiece));
- if(!(appData.icsActive && PieceToChar(realPiece) == '+') && // trust ICS if it moves promoted pieces
- piece && realPiece != cl.pieceIn) return ImpossibleMove;
- } else if(!separator && **p == '+') { // could be a protocol move, where bare '+' suffix means shogi-style promotion
- if(realPiece < (wom ? WhiteCannon : BlackCannon) && PieceToChar(PROMOTED(realPiece)) == '+') // seems to be that
- currentMoveString[4] = cl.promoCharIn = *(*p)++; // append promochar after all
- }
- result = LegalityTest(boards[yyboardindex], PosFlags(yyboardindex), fromY, fromX, toY, toX, cl.promoCharIn);
- if (currentMoveString[4] == NULLCHAR) { // suppy missing mandatory promotion character
- if(result == WhitePromotion || result == BlackPromotion) {
- switch(gameInfo.variant) {
- case VariantCourier:
- case VariantShatranj: currentMoveString[4] = PieceToChar(BlackFerz); break;
- case VariantGreat: currentMoveString[4] = PieceToChar(BlackMan); break;
- case VariantShogi: currentMoveString[4] = '+'; break;
- default: currentMoveString[4] = PieceToChar(BlackQueen);
- }
- } else if(result == WhiteNonPromotion || result == BlackNonPromotion) {
- currentMoveString[4] = '=';
- }
- } 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 result;
- } else if(cl.pieceIn == EmptySquare) cl.pieceIn = wom ? WhitePawn : BlackPawn;
- cl.ffIn = type[0] == NOTHING ? -1 : coord[0] + 'a' - AAA;
- cl.rfIn = type[1] == NOTHING ? -1 : coord[1] + '0' - ONE;
-
- Disambiguate(boards[yyboardindex], PosFlags(yyboardindex), &cl);
-
- if(cl.kind == ImpossibleMove && !piece && type[1] == NOTHING // fxg5 type
- && toY == (wom ? 4 : 3)) { // could be improperly written e.p.
- cl.rtIn += wom ? 1 : -1; // shift target square to e.p. square
- Disambiguate(boards[yyboardindex], PosFlags(yyboardindex), &cl);
- if((cl.kind != WhiteCapturesEnPassant && cl.kind != BlackCapturesEnPassant))
- return ImpossibleMove; // nice try, but no cigar
- }
-
- currentMoveString[0] = cl.ff + AAA;
- currentMoveString[1] = cl.rf + ONE;
- currentMoveString[3] = cl.rt + ONE;
- if(killX < 0) // [HGM] lion: do not overwrite kill-square suffix
- currentMoveString[4] = cl.promoChar;
-
- if((cl.kind == WhiteCapturesEnPassant || cl.kind == BlackCapturesEnPassant) && !Match("ep", p)) Match("e.p.", p);
-
- return (int) cl.kind;
- }
- }
-badMove:// we failed to find algebraic move
- *p = oldp;
-
-
- // Next we do some common symbols where the first character commits us to things that cannot possibly be a move
-
- // ********* PGN tags ******************************************
- if(**p == '[') {
- oldp = ++(*p); kifu = 0;
- if(Match("--", p)) { // "[--" could be start of position diagram
- if(!Scan(']', p) && (*p)[-3] == '-' && (*p)[-2] == '-') return PositionDiagram;
- *p = oldp;
- }
- SkipWhite(p);
- if(isdigit(**p) || isalpha(**p)) {
- do (*p)++; while(isdigit(**p) || isalpha(**p) || **p == '+' ||
- **p == '-' || **p == '=' || **p == '_' || **p == '#');
- SkipWhite(p);
- if(**p == '"') {
- (*p)++;
- while(**p != '\n' && (*(*p)++ != '"'|| (*p)[-2] == '\\')); // look for unescaped quote
- if((*p)[-1] !='"') { *p = oldp; Scan(']', p); return Comment; } // string closing delimiter missing
- SkipWhite(p); if(*(*p)++ == ']') return PGNTag;
- }
- }
- Scan(']', p); return Comment;
- }
-
- // ********* SAN Castings *************************************
- if(**p == 'O' || **p == 'o' || **p == '0' && !Match("00:", p)) { // exclude 00 in time stamps
- int castlingType = 0;
- if(Match("O-O-O", p) || Match("o-o-o", p) || Match("0-0-0", p) ||
- Match("OOO", p) || Match("ooo", p) || Match("000", p)) castlingType = 2;
- else if(Match("O-O", p) || Match("o-o", p) || Match("0-0", p) ||
- Match("OO", p) || Match("oo", p) || Match("00", p)) castlingType = 1;
- if(castlingType) { //code from old parser, collapsed for both castling types, and streamlined a bit
- int rf, ff, rt, ft; ChessSquare king;
- char promo=NULLCHAR;
-
- if(gameInfo.variant == VariantSChess) promo = PromoSuffix(p);
-
- if (yyskipmoves) return (int) AmbiguousMove; /* not disambiguated */
-
- if (wom) {
- rf = castlingRank[0];
- rt = castlingRank[0];
- king = WhiteKing;
- } else {
- rf = castlingRank[3];
- rt = castlingRank[3];
- king = BlackKing;
- }
- ff = (BOARD_WIDTH-1)>>1; // this would be d-file
- if (boards[yyboardindex][rf][ff] == king) {
- /* ICS wild castling */
- ft = castlingType == 1 ? BOARD_LEFT+1 : (gameInfo.variant == VariantJanus ? BOARD_RGHT-2 : BOARD_RGHT-3);
- } else {
- char *q;
- ff = BOARD_WIDTH>>1; // e-file
- ft = castlingType == 1 ? BOARD_RGHT-2 : BOARD_LEFT+2;
- if(pieceDesc[king] && (q = strchr(pieceDesc[king], 'O'))) { // redefined to non-default King stride
- ft = (castlingType == 1 ? ff + atoi(q+1) : ff - atoi(q+1));
- }
- }
- if(PosFlags(0) & F_FRC_TYPE_CASTLING) {
- if (wom) {
- ff = initialRights[2];
- ft = initialRights[castlingType-1];
- } else {
- ff = initialRights[5];
- ft = initialRights[castlingType+2];
- }
- if (appData.debugMode) fprintf(debugFP, "Parser FRC (type=%d) %d %d\n", castlingType, ff, ft);
- if(ff == NoRights || ft == NoRights) return ImpossibleMove;
- }
- sprintf(currentMoveString, "%c%c%c%c%c",ff+AAA,rf+ONE,ft+AAA,rt+ONE,promo);
- if (appData.debugMode) fprintf(debugFP, "(%d-type) castling %d %d\n", castlingType, ff, ft);
-
- return (int) LegalityTest(boards[yyboardindex],
- PosFlags(yyboardindex)&~F_MANDATORY_CAPTURE, // [HGM] losers: e.p.!
- rf, ff, rt, ft, promo);
- } else if(Match("01", p)) return Nothing; // prevent this from being mistaken for move number 1
- }
-
-
- // ********* variations (nesting) ******************************
- if(**p =='(') {
- if(RdTime(')', p)) return ElapsedTime;
- return Open;
- }
- if(**p ==')') { (*p)++; return Close; }
- if(**p == ';') { while(**p != '\n') (*p)++; return Comment; }
-
-
- // ********* Comments and result messages **********************
- *p = oldp; commentEnd = NULL; result = 0;
- if(**p == '{') {
- if(RdTime('}', p)) return ElapsedTime;
- if(lastChar == '\n' && Match("--------------\n", p)) {
- char *q;
- i = Scan ('}', p); q = *p - 16;
- if(Match("\n--------------}\n", &q)) return PositionDiagram;
- } else i = Scan('}', p);
- commentEnd = *p; if(i) return Comment; // return comment that runs to EOF immediately
- }
- if(commentEnd) SkipWhite(p);
- if(kifu && **p == '*') { // .kif comment
- char *q = yytext;
- while(**p && **p != '\n') { if(q < yytext + 10*MSG_SIZ-3) *q++ = **p; (*p)++; }
- parseStart = yytext; *yytext = '{'; strcpy(q, "}\n"); // wrap in braces
- return Comment;
- }
- if(Match("*", p)) result = GameUnfinished;
- else if(**p == '0') {
- if( Match("0-1", p) || Match("0/1", p) || Match("0:1", p) ||
- Match("0 - 1", p) || Match("0 / 1", p) || Match("0 : 1", p)) result = BlackWins;
- } else if(**p == '1') {
- if( Match("1-0", p) || Match("1/0", p) || Match("1:0", p) ||
- Match("1 - 0", p) || Match("1 / 0", p) || Match("1 : 0", p)) result = WhiteWins;
- else if(Match("1/2 - 1/2", p) || Match("1/2:1/2", p) || Match("1/2 : 1/2", p) || Match("1 / 2 - 1 / 2", p) ||
- Match("1 / 2 : 1 / 2", p) || Match("1/2", p) || Match("1 / 2", p)) result = GameIsDrawn;
- }
- if(result) {
- if(Match(" (", p) && !Scan(')', p) || Match(" {", p) && !Scan('}', p)) { // there is a comment after the PGN result!
- if(commentEnd) { *p = commentEnd; return Comment; } // so comment before it is normal comment; return that first
- }
- return result; // this returns a possible preceeding comment as result details
- }
- if(commentEnd) { *p = commentEnd; return Comment; } // there was no PGN result following, so return as normal comment
-
-
- // ********* Move numbers (after castlings or PGN results!) ***********
- if((i = Number(p)) != BADNUMBER) { // a single number was read as part of our attempt to read a move
- char *numEnd = *p;
- if(**p == '.') (*p)++; SkipWhite(p);
- if(**p == '+' || isalpha(**p) || gameInfo.variant == VariantShogi && *p != numEnd && isdigit(**p)) {
- *p = numEnd;
- return i == 1 ? MoveNumberOne : Nothing;
- }
- *p = numEnd; return Nothing;
- }
-
-
- // ********* non-compliant game-result indicators *********************
- if(Match("+-+", p) || Word("stalemate", p)) return GameIsDrawn;
- if(Match("++", p) || Verb("resign", p) || (Word("check", p) || 1) && Word("mate", p) )
- return (wom ? BlackWins : WhiteWins);
- c = ToUpper(**p);
- if(Word("w", p) && (Match("hite", p) || 1) || Word("b", p) && (Match("lack", p) || 1) ) {
- if(**p != ' ') return Nothing;
- ++*p;
- if(Verb("disconnect", p)) return GameUnfinished;
- if(Verb("resign", p) || Verb("forfeit", p) || Word("mated", p) || Word("lost", p) || Word("loses", p))
- return (c == 'W' ? BlackWins : WhiteWins);
- if(Word("mates", p) || Word("wins", p) || Word("won", p))
- return (c != 'W' ? BlackWins : WhiteWins);
- return Nothing;
- }
- if(Word("draw", p)) {
- if(**p == 'n') (*p)++;
- if(**p != ' ') return GameIsDrawn;
- oldp = ++*p;
- if(Word("agreed", p)) return GameIsDrawn;
- if(Match("by ", p) && (Word("repetition", p) || Word("agreement", p)) ) return GameIsDrawn;
- *p = oldp;
- if(*(*p)++ == '(') {
- while(**p != '\n') if(*(*p)++ == ')') break;
- if((*p)[-1] == ')') return GameIsDrawn;
- }
- *p = oldp - 1; return GameIsDrawn;
- }
-
-
- // ********* Numeric annotation glyph **********************************
- if(**p == '$') { (*p)++; if(Number(p) != BADNUMBER) return NAG; return Nothing; }
-
-
- // ********** by now we are getting down to the silly stuff ************
- if(Word("gnu", p) || Match("GNU", p)) {
- if(**p == ' ') (*p)++;
- if(Word("chess", p) || Match("CHESS", p)) {
- char *q;
- if((q = strstr(*p, "game")) || (q = strstr(*p, "GAME")) || (q = strstr(*p, "Game"))) {
- (*p) = q + 4; return GNUChessGame;
- }
- }
- return Nothing;
- }
- if(lastChar == '\n' && (Match("# ", p) || Match("; ", p) || Match("% ", p))) {
- while(**p != '\n' && **p != ' ') (*p)++;
- if(**p == ' ' && (Match(" game file", p) || Match(" position file", p))) {
- while(**p != '\n') (*p)++; // skip to EOLN
- return XBoardGame;
- }
- *p = oldp; // we might need to re-match the skipped stuff
- }
-
- if(Match("---", p)) { while(**p == '-') (*p)++; return Nothing; } // prevent separators parsing as null move
- if(Match("@@@@", p) || Match("--", p) || Match("Z0", p) || Match("pass", p) || Match("null", p)) {
- strncpy(currentMoveString, "@@@@", 5);
- return yyboardindex & F_WHITE_ON_MOVE ? WhiteDrop : BlackDrop;
- }
-
- // ********* Efficient skipping of (mostly) alphabetic chatter **********
- while(isdigit(**p) || isalpha(**p) || **p == '-') (*p)++;
- if(*p != oldp) {
- if(**p == '\'') {
- while(isdigit(**p) || isalpha(**p) || **p == '-' || **p == '\'') (*p)++;
- return Nothing; // random word
- }
- if(lastChar == '\n' && Match(": ", p)) { // mail header, skip indented lines
- do {
- while(**p != '\n') (*p)++;
- if(!ReadLine()) return Nothing; // append next line if not EOF
- } while(Match("\n ", p) || Match("\n\t", p));
- }
- return Nothing;
- }
-
- // ********* Prevent 00 in unprotected time stamps to be mistaken for castling *******
- if(Match(":00", p)) return Nothing;
-
- // ********* Could not match to anything. Return offending character ****
- (*p)++;
- return Nothing;
-}
-
-/*
- Return offset of next pattern in the current file.
-*/
-int
-yyoffset ()
-{
- return ftell(inputFile) - (inPtr - parsePtr); // subtract what is read but not yet parsed
-}
-
-void
-yynewfile (FILE *f)
-{ // prepare parse buffer for reading file
- inputFile = f;
- inPtr = parsePtr = inputBuf;
- fromString = 0;
- lastChar = '\n';
- *inPtr = NULLCHAR; // make sure we will start by reading a line
-}
-
-void
-yynewstr P((char *s))
-{
- parsePtr = s;
- inputFile = NULL;
- fromString = 1;
-}
-
-int
-yylex ()
-{ // this replaces the flex-generated parser
- int result = NextUnit(&parsePtr);
- char *p = parseStart, *q = yytext;
- if(p == yytext) return result; // kludge to allow kanji expansion
- while(p < parsePtr) *q++ = *p++; // copy the matched text to yytext[]
- *q = NULLCHAR;
- lastChar = q[-1];
- return result;
-}
-
-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;
-}
-
-ChessMove
-yylexstr (int boardIndex, char *s, char *buf, int buflen)
-{
- ChessMove ret;
- char *savPP = parsePtr;
- fromString = 1;
- yyboardindex = boardIndex;
- parsePtr = s;
- ret = (ChessMove) Myylex();
- strncpy(buf, yy_text, buflen-1);
- buf[buflen-1] = NULLCHAR;
- parsePtr = savPP;
- fromString = 0;
- return ret;
-}
projects / xboard.git / blobdiff