/* interact.cc - Interactive component of CHESS (parent module of *ui.cc modules) This file was extracted from the original GNU Chess file nuxui.c and converted to C++ by Warwick Allison. It is a the generic portion of the user interface. 1993-11-23 Revision: 1990-05-09 Copyright (C) 1986, 1987, 1988, 1989, 1990 Free Software Foundation, Inc. Copyright (c) 1988, 1989, 1990 John Stanback Modified extensively Nov 1989 Christopher North-Keys 40x24 two-colour display option for shading black squares expanded game save, list, and restore features using $HOME option to disable display of coordinates optional auto-updating of positional information optional starring of black side mass toggle for reverse-video functions This file is part of CHESS. CHESS is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY. No author or distributor accepts responsibility to anyone for the consequences of using it or for whether it serves any particular purpose or works at all, unless he says so in writing. Refer to the CHESS General Public License for full details. Everyone is granted permission to copy, modify and redistribute CHESS, but only under the conditions described in the CHESS General Public License. A copy of this license is supposed to have been given to you along with CHESS so you can know your rights and responsibilities. It should be in a file named COPYING. Among other things, the copyright notice and this notice must be preserved on all copies. */ #include #include #include #include #ifdef MSDOS #include #include #include #else #include #include #include #include #undef bool // curses.h defines it to char... #undef TRUE #undef FALSE #endif /* MSDOS */ extern "C" { #include "gnuchess.h" #include "/usr/gnuchess/src/ataks.h" }; char *DRAW; int mycnt1, mycnt2; #include "ui.h" //#define pxx " PNBRQK" //#define qxx " pnbrqk" //#define rxx "12345678" //#define cxx "abcdefgh" /* coordinates within a square for the following are ([1,5],[1,3]) */ #define VIR_C(s) ((flag.reverse) ? 7-column(s) : column(s)) #define VIR_R(s) ((flag.reverse) ? 7-row(s) : row(s)) //#define VIR_C(s) (column(s)) //#define VIR_R(s) (row(s)) #define Vblack(s) (!((VIR_C(s) + VIR_R(s)) % 2)) static char mvstr[4][6]; static long evrate; short PositionFlag = 0; short coords = 1; void TerminateSearch (int), Die (int); void Initialize (void) { signal (SIGINT, Die); #ifndef MSDOS signal (SIGQUIT, Die); #endif ui_Initialize(); mycnt1=0; mycnt2=0; } void ExitChess (void) { //ListGame (); ui_Finalize(); exit (0); } void Die (int Sig) { signal (SIGINT, SIG_IGN); #ifdef MSDOS Sig++; /* shut up the compiler */ #else signal (SIGQUIT, SIG_IGN); #endif /* MSDOS */ if (ui_AskAbort()) ExitChess (); signal (SIGINT, Die); #ifndef MSDOS signal (SIGQUIT, Die); #endif /* MSDOS */ } void TerminateSearch (int Sig) { signal (SIGINT, SIG_IGN); #ifdef MSDOS Sig++; /* shut up the compiler */ #else signal (SIGQUIT, SIG_IGN); #endif /* MSDOS */ if (!flag.timeout) flag.musttimeout = true; flag.bothsides = false; signal (SIGINT, Die); #ifndef MSDOS signal (SIGQUIT, Die); #endif /* MSDOS */ } void algbr (short int f, short int t, short int flag) /* Generate move strings in different formats. */ { int m3p; if (f != t) { /* algebraic notation */ mvstr[0][0] = cxx[column (f)]; mvstr[0][1] = rxx[row (f)]; mvstr[0][2] = cxx[column (t)]; mvstr[0][3] = rxx[row (t)]; mvstr[0][4] = mvstr[3][0] = '\0'; if ((mvstr[1][0] = pxx[board[f]]) == 'P') { if (mvstr[0][0] == mvstr[0][2]) /* pawn did not eat */ { mvstr[2][0] = mvstr[1][0] = mvstr[0][2]; /* to column */ mvstr[2][1] = mvstr[1][1] = mvstr[0][3]; /* to row */ m3p = 2; } else /* pawn ate */ { mvstr[2][0] = mvstr[1][0] = mvstr[0][0]; /* from column */ mvstr[2][1] = mvstr[1][1] = mvstr[0][2]; /* to column */ mvstr[2][2] = mvstr[0][3]; m3p = 3; /* to row */ } mvstr[2][m3p] = mvstr[1][2] = '\0'; if (flag & promote) { mvstr[0][4] = mvstr[1][2] = mvstr[2][m3p] = qxx[flag & pmask]; mvstr[1][3] = mvstr[2][m3p + 1] = mvstr[0][5] = '\0'; } } else /* not a pawn */ { mvstr[2][0] = mvstr[1][0]; mvstr[2][1] = mvstr[0][1]; mvstr[2][2] = mvstr[1][1] = mvstr[0][2]; /* to column */ mvstr[2][3] = mvstr[1][2] = mvstr[0][3]; /* to row */ mvstr[2][4] = mvstr[1][3] = '\0'; strcpy (mvstr[3], mvstr[2]); mvstr[3][1] = mvstr[0][0]; if (flag & cstlmask) { if (t > f) { strcpy (mvstr[1], "o-o"); strcpy (mvstr[2], "O-O"); } else { strcpy (mvstr[1], "o-o-o"); strcpy (mvstr[2], "O-O-O"); } } } } else mvstr[0][0] = mvstr[1][0] = mvstr[2][0] = mvstr[3][0] = '\0'; } int VerifyMove (char *s, short int iop, short unsigned int *mv) /* Compare the string 's' to the list of legal moves available for the opponent. If a match is found, make the move on the board. */ { static short pnt, tempb, tempc, tempsf, tempst, cnt; static struct leaf xnode; struct leaf *node; *mv = 0; if (iop == 2) { UnmakeMove (opponent, &xnode, &tempb, &tempc, &tempsf, &tempst); return (false); } cnt = 0; MoveList (opponent, 2); pnt = TrPnt[2]; while (pnt < TrPnt[3]) { node = &Tree[pnt++]; algbr (node->f, node->t, (short) node->flags); if (strcmp (s, mvstr[0]) == 0 || strcmp (s, mvstr[1]) == 0 || strcmp (s, mvstr[2]) == 0 || strcmp (s, mvstr[3]) == 0) { cnt++; xnode = *node; } } if (cnt == 1) { MakeMove (opponent, &xnode, &tempb, &tempc, &tempsf, &tempst, &INCscore); if (SqAtakd (PieceList[opponent][0], computer)) { UnmakeMove (opponent, &xnode, &tempb, &tempc, &tempsf, &tempst); ShowMessage ("Illegal Move!"); return (false); } else { if (iop == 1) return (true); UpdateDisplay (xnode.f, xnode.t, 0, (short) xnode.flags); if ((board[xnode.t] == pawn) || (xnode.flags & capture) || (xnode.flags & cstlmask)) { Game50 = GameCnt; ZeroRPT (); } GameList[GameCnt].depth = GameList[GameCnt].score = 0; GameList[GameCnt].nodes = 0; ElapsedTime (1); GameList[GameCnt].time = (short) (et+50)/100; if (TCflag) { TimeControl.clock[opponent] -= et; timeopp[oppptr] = et; --TimeControl.moves[opponent]; } *mv = (xnode.f << 8) | xnode.t; algbr (xnode.f, xnode.t, false); return (true); } } if (cnt > 1) { ShowMessage ("Ambiguous Move!"); } return (false); } void help (void) { ui_GiveHelp(computer,0,flag.easy,MaxSearchDepth,dither,flag.hash); } void EditBoard (void) /* Set up a board position. Pieces are entered by typing the piece followed by the location. For example, Nf3 will place a knight on square f3. */ { short a, r, c, sq, i; char s[80]; ui_ShowEditHelp(); a = white; do { ui_ShowEditColor(a); ui_GetPieceAndLocation(s); if (s[0] == '#') { for(sq = 0; sq < 64; sq++) { board[sq] = no_piece; color[sq] = neutral; DrawPiece (sq); } } if (s[0] == 'c' || s[0] == 'C') a = otherside[a]; c = s[1] - 'a'; r = s[2] - '1'; if ((c >= 0) && (c < 8) && (r >= 0) && (r < 8)) { sq = locn (r, c); for (i = king; i > no_piece; i--) if ((s[0] == pxx[i]) || (s[0] == qxx[i])) break; board[sq] = i; color[sq] = (board[sq] == no_piece) ? neutral : a; DrawPiece (sq); } } while (s[0] != '.'); for (sq = 0; sq < 64; sq++) Mvboard[sq] = (board[sq] != Stboard[sq]) ? 10 : 0; GameCnt = 0; Game50 = 1; ZeroRPT (); Sdepth = 0; InitializeStats (); ui_ClearEditHelp(); UpdateDisplay (0, 0, 1, 0); } void ShowPlayers (void) { ui_ShowPlayers(flag.reverse,computer==black); } void ShowDepth (char ch) { ui_ShowDepth(Sdepth,ch); ui_RefreshEarly(); } void ShowScore (short score) { ui_ShowScore(score); } void ShowMessage (char *s) { ui_ShowMessage(s); } void ClearMessage (void) { ui_ClearMessage(); } void ShowCurrentMove (short int pnt, short int f, short int t) { algbr (f, t, false); ui_ShowCurrentMove(pnt,mvstr[0]); } void ShowHeader (void) { ui_ShowTitle(); } void ShowSidetoMove (void) { ui_ShowSideToMove(1+GameCnt/2,player); } void ShowPrompt (void) { ui_PromptForMove(); } void ShowNodeCnt (long int NodeCnt, long int evrate) { ui_ShowNodeCnt(NodeCnt,evrate); } void ShowResults (short int score, short unsigned int *bstline, char ch) { unsigned char d, ply; if (flag.post) { ShowDepth (ch); ShowScore (score); d = 7; for (ply = 1; bstline[ply] > 0; ply++) { algbr ((short) bstline[ply] >> 8, (short) bstline[ply] & 0xFF, false); ui_ShowPlyMove(ply,mvstr[0]); } ui_NoMorePly(ply); } } void SearchStartStuff (short int side) { ui_SearchStartStuff(side); } void OutputMove (void) { if(flag.illegal){ShowMessage(CP[225]);return;} int i; if (root->flags & draw) i=1; else if (root->score == -9999) i=2; else if (root->score == 9998) i=3; else if (root->score < -9000) i=4; else if (root->score > 9000) i=5; else i=0; ui_ShowComputerMove(mvstr[0],i); UpdateDisplay (root->f, root->t, 0, (short) root->flags); if (flag.post) { ShowNodeCnt (NodeCnt, evrate); for (i = 1999; i >= 0 && Tree[i].f == 0 && Tree[i].t == 0; i--); ui_ShowMaxTree(i); } } void ElapsedTime (short int iop) /* Determine the time that has passed since the search was started. If the elapsed time exceeds the target (ResponseTime+ExtraTime) then set timeout to true which will terminate the search. */ { et = (time ((long *) 0) - time0) * 100; ETnodes = NodeCnt + ZNODES; if (et < 0) et = 0; if (iop == 1) { if (et > ResponseTime + ExtraTime && Sdepth > MINDEPTH) flag.timeout = true; ETnodes = NodeCnt + ZNODES; time0 = time ((long *) 0); } UpdateClocks (); } void UpdateClocks (void) { short m, s; m = (short) (et / 6000); s = (short) (et - 6000 * (long) m) / 100; if (TCflag) { m = (short) ((TimeControl.clock[player] - et) / 6000); s = (short) ((TimeControl.clock[player] - et - 6000 * (long) m) / 100); } if (m < 0) m = 0; if (s < 0) s = 0; ui_ShowClock(flag.reverse ^ (player==white),m,s); if (flag.post) ShowNodeCnt (NodeCnt, evrate); /*refresh ();*/ } void SetTimeControl (void) { if (TCflag) { TimeControl.moves[white] = TimeControl.moves[black] = TCmoves; TimeControl.clock[white] += 6000L * TCminutes + TCseconds * 100; TimeControl.clock[black] += 6000L * TCminutes + TCseconds * 100; } else { TimeControl.moves[white] = TimeControl.moves[black] = 0; TimeControl.clock[white] = TimeControl.clock[black] = 0; } flag.onemove = (TCmoves == 1); et = 0; ElapsedTime (1); } void DrawPiece (short int sq) { ui_DrawPiece(color[sq]!=neutral,color[sq]==black,VIR_C(sq),VIR_R(sq),board[sq]); } void DrawSquare (short int sq) { ui_DrawSquare(VIR_C(sq),VIR_R(sq),Vblack(sq)); } void DrawCoords (void) { ui_DrawCoords(); } void ShowPostnValue (short int sq) /* must have called ExaminePosition() first */ { short score; score = ScorePosition (color[sq]); ui_ShowPosnValue(sq,score); } void ShowPostnValues (void) { short sq, score; ExaminePosition (); for (sq = 0; sq < 64; sq++) ShowPostnValue (sq); score = ScorePosition (opponent); ShowScore (score); } void UpdateDisplay (short int f, short int t, short int redraw, short int isspec) { short sq; if (redraw) { ShowHeader (); ShowPlayers (); for (sq = 0; sq < 64; sq++) { DrawSquare (sq); DrawPiece (sq); } if (coords) DrawCoords (); } else { DrawPiece (f); DrawPiece (t); if (isspec & cstlmask) if (t > f) { DrawPiece (f + 3); DrawPiece (t - 1); } else { DrawPiece (f - 4); DrawPiece (t + 1); } else if (isspec & epmask) { DrawPiece (t - 8); DrawPiece (t + 8); } } if (PositionFlag) ShowPostnValues (); /*refresh ();*/ } void GetGame (void) { FILE *fd; char fname[256]; char *tmp; int c; short sq; unsigned short m; fname[0] = 0; ui_GetFilename("Load",fname); if (fname[0]!=-1) { if (!fname[0]) strcpy (fname, "chess.000"); ui_ShowFileLoading(fname); if ((fd = fopen (fname, "r")) == NULL) { ui_LoadFailed(); return; } fscanf (fd, "%hd%hd%hd", &computer, &opponent, &Game50); fscanf (fd, "%hd%hd", &castld[white], &castld[black]); fscanf (fd, "%hd%hd", &TCflag, &OperatorTime); fscanf (fd, "%ld%ld%hd%hd", &TimeControl.clock[white], &TimeControl.clock[black], &TimeControl.moves[white], &TimeControl.moves[black]); for (sq = 0; sq < 64; sq++) { fscanf (fd, "%hd%hd", &m, &Mvboard[sq]); board[sq] = (m >> 8); color[sq] = (m & 0xFF); if (color[sq] == 0) color[sq] = neutral; else --color[sq]; } GameCnt = 0; c = '?'; while (c != EOF) { ++GameCnt; c = fscanf (fd, "%hd%hd%hd%ld%hd%hd%hd", &GameList[GameCnt].gmove, &GameList[GameCnt].score, &GameList[GameCnt].depth, &GameList[GameCnt].nodes, &GameList[GameCnt].time, &GameList[GameCnt].piece, &GameList[GameCnt].color); if (GameList[GameCnt].color == 0) GameList[GameCnt].color = neutral; else --GameList[GameCnt].color; } GameCnt--; if (TimeControl.clock[white] > 0) TCflag = true; computer--; opponent--; fclose (fd); InitializeStats (); Sdepth = 0; ui_LoadDone(); UpdateDisplay (0, 0, 1, 0); } } void SaveGame (void) { FILE *fd; char fname[256]; char *tmp; short sq, i, c; fname[0] = 0; ui_GetFilename("Save",fname); if (!fname[0]) strcpy (fname, "chess.000"); ui_ShowFileSaving(fname); if (NULL == (fd = fopen (fname, "w"))) { ui_SaveFailed(); return; } fprintf (fd, "%d %d %d\n", computer + 1, opponent + 1, Game50); fprintf (fd, "%d %d\n", castld[white], castld[black]); fprintf (fd, "%d %d\n", TCflag, OperatorTime); fprintf (fd, "%ld %ld %d %d\n", TimeControl.clock[white], TimeControl.clock[black], TimeControl.moves[white], TimeControl.moves[black]); for (sq = 0; sq < 64; sq++) { if (color[sq] == neutral) c = 0; else c = color[sq] + 1; fprintf (fd, "%d %d\n", 256 * board[sq] + c, Mvboard[sq]); } for (i = 1; i <= GameCnt; i++) { if (GameList[i].color == neutral) c = 0; else c = GameList[i].color + 1; fprintf (fd, "%d %d %d %ld %d %d %d\n", GameList[i].gmove, GameList[i].score, GameList[i].depth, GameList[i].nodes, GameList[i].time, GameList[i].piece, c); } fclose (fd); ui_SaveDone(); } void ListGame (void) { FILE *fd; char fname[256]; char *tmp; short i, f, t; fname[0] = 0; ui_GetFilename("List",fname); if (!fname[0]) strcpy (fname, "chess.lst"); if (!(fd = fopen (fname, "w"))) { ShowMessage ("Cannot write move list"); return; } fprintf (fd, "\n"); fprintf (fd, " score depth nodes time "); fprintf (fd, " score depth nodes time\n"); for (i = 1; i <= GameCnt; i++) { f = GameList[i].gmove >> 8; t = (GameList[i].gmove & 0xFF); algbr (f, t, false); if ((i % 2) == 1) fprintf (fd, "\n"); else fprintf (fd, " "); fprintf (fd, "%5s %5d %2d %7ld %5d", mvstr[0], GameList[i].score, GameList[i].depth, GameList[i].nodes, GameList[i].time); } fprintf (fd, "\n\n"); fclose (fd); //ShowMessage ("Move list written"); } void Undo (void) /* Undo the most recent half-move. */ { short f, t; f = GameList[GameCnt].gmove >> 8; t = GameList[GameCnt].gmove & 0xFF; if (board[t] == king && distance (t, f) > 1) (void) castle (GameList[GameCnt].color, f, t, 2); else { /* Check for promotion: */ if ((color[t] == white && row (f) == 6 && row (t) == 7) || (color[t] == black && row (f) == 1 && row (t) == 0)) { int g, from = f; for (g = GameCnt - 1; g > 0; g--) if (GameList[g].gmove & 0xFF == from) from = GameList[g].gmove >> 8; if ((color[t] == white && row (from) == 1) || (color[t] == black && row (from) == 6)) board[t] = pawn; } board[f] = board[t]; color[f] = color[t]; board[t] = GameList[GameCnt].piece; color[t] = GameList[GameCnt].color; if (color[t] != neutral) Mvboard[t]--; Mvboard[f]--; } if (TCflag) ++TimeControl.moves[color[f]]; GameCnt--; computer = otherside[computer]; opponent = otherside[opponent]; flag.mate = false; Sdepth = 0; UpdateDisplay (0, 0, 1, 0); InitializeStats (); } /* void ChangeAlphaWindow (void) { ShowMessage ("Awindow= "); scanz ("%hd", &Awindow); } void ChangeBetaWindow (void) { ShowMessage ("Bwindow= "); scanz ("%hd", &Bwindow); } */ void GiveHint (void) { algbr ((short) (hint >> 8), (short) (hint & 0xFF), false); ui_ShowHint(mvstr[0]); } void ChangeSearchDepth (void) { int msd; ui_ChangeSearchDepth(&msd); MaxSearchDepth=(short)msd; } void SetContempt (void) { int c; ui_ChangeContempt(&c); contempt=(short)c; } /* void ChangeXwindow (void) { ShowMessage ("xwndw= "); scanz ("%hd", &xwndw); } */ void SelectLevel (char *sx) { OperatorTime = 0; TCmoves = 60; TCminutes = 5; TCseconds = 0; int Level=1; ui_ChangeLevel(&Level); switch ((int) Level) { case 1: TCmoves = 60; TCminutes = 5; break; case 2: TCmoves = 60; TCminutes = 15; break; case 3: TCmoves = 60; TCminutes = 30; break; case 4: TCmoves = 40; TCminutes = 30; break; case 5: TCmoves = 40; TCminutes = 60; break; case 6: TCmoves = 40; TCminutes = 120; break; case 7: TCmoves = 40; TCminutes = 240; break; case 8: TCmoves = 1; TCminutes = 15; break; case 9: TCmoves = 1; TCminutes = 60; break; case 10: TCmoves = 1; TCminutes = 600; break; } TCflag = (TCmoves > 0); TimeControl.clock[white] = TimeControl.clock[black] = 0; SetTimeControl (); /*ClrScreen (); WHY? UpdateDisplay (0, 0, 1, 0);*/ } void DoDebug (void) { short c, p, sq, tp, tc, tsq, score; char s[40]; ExaminePosition (); ui_ChoosePiece(s); c = neutral; if (s[0] == 'w' || s[0] == 'W') c = white; if (s[0] == 'b' || s[0] == 'B') c = black; for(p = king; p > no_piece; p--) if ((s[1] == pxx[p]) || (s[1] == qxx[p])) break; for (sq = 0; sq < 64; sq++) { tp = board[sq]; tc = color[sq]; board[sq] = p; color[sq] = c; tsq = PieceList[c][1]; PieceList[c][1] = sq; ShowPostnValue (sq); PieceList[c][1] = tsq; board[sq] = tp; color[sq] = tc; } score = ScorePosition (opponent); ShowScore (score); } void // C header = TestSpeed(void (*f) (short int side, short int ply)) TestSpeed(void f(short int side, short int ply)) { short i; long t1, t2; t1 = time (0); for (i = 0; i < 10000; i++) { f (opponent, 2); } t2 = time (0); NodeCnt = 10000L * (TrPnt[3] - TrPnt[2]); evrate = NodeCnt / (t2 - t1); ShowNodeCnt (NodeCnt, evrate); } void InputCommand (void) /* Process the users command. If easy mode is OFF (the computer is thinking on opponents time) and the program is out of book, then make the 'hint' move on the board and call SelectMove() to find a response. The user terminates the search by entering ^C (quit siqnal) before entering a command. If the opponent does not make the hint move, then set Sdepth to zero. */ { short ok, tmp; unsigned short mv; char s[80]; ok = flag.quit = false; player = opponent; //ShowSidetoMove (); // Delayed until ready to GetMove ft = 0; if (hint > 0 && !flag.easy && Book == NULL) { fflush (stdout); time0 = time ((long *) 0); algbr ((short) hint >> 8, (short) hint & 0xFF, false); strcpy (s, mvstr[0]); tmp = epsquare; if (VerifyMove (s, 1, &mv)) { ShowPrompt (); SelectMove (computer, 2); (void) VerifyMove (mvstr[0], 2, &mv); if (Sdepth > 0) Sdepth--; } ft = time ((long *) 0) - time0; epsquare = tmp; } signal (SIGINT, Die); #ifndef MSDOS signal (SIGQUIT, Die); #endif /* MSDOS */ while (!(ok || flag.quit)) { player = opponent; ShowSidetoMove(); MoveList (opponent, 2); // For CalculateLegalMove ui_GetMove(s); ok = VerifyMove (s, 0, &mv); if (ok) { if (mv != hint) { Sdepth = 0; ft = 0; } } else if (*s == '\0') UpdateDisplay (0, 0, 1, 0); else if (strcmp (s, "bd") == 0) { /*ClrScreen ();*/ UpdateDisplay (0, 0, 1, 0); } else if ((strcmp (s, "quit") == 0) || (strcmp (s, "exit") == 0)) flag.quit = true; else if (strcmp (s, "post") == 0) flag.post = !flag.post; else if (strcmp (s, "edit") == 0) EditBoard (); else if (strcmp (s, "go") == 0) ok = true; else if (strcmp (s, "help") == 0) help (); else if (strcmp (s, "force") == 0) flag.force = !flag.force; else if (strcmp (s, "book") == 0) Book = NULL; else if (strcmp (s, "undo") == 0 && GameCnt > 0) Undo (); else if (strcmp (s, "new") == 0) { NewGame (); UpdateDisplay (0, 0, 1, 0); } else if (strcmp (s, "list") == 0) ListGame (); else if (strcmp (s, "level") == 0) SelectLevel (""); else if (strcmp (s, "hash") == 0) flag.hash = !flag.hash; else if (strcmp (s, "beep") == 0) flag.beep = !flag.beep; /* else if (strcmp (s, "Awindow") == 0) ChangeAlphaWindow (); else if (strcmp (s, "Bwindow") == 0) ChangeBetaWindow (); */ else if (strcmp (s, "hint") == 0) GiveHint (); else if (strcmp (s, "both") == 0) { flag.bothsides = !flag.bothsides; Sdepth = 0; SelectMove (opponent, 1); ok = true; } else if (strcmp (s, "reverse") == 0) { flag.reverse = !flag.reverse; /*ClrScreen ();*/ UpdateDisplay (0, 0, 1, 0); } #if !defined(MSDOS) || defined(SEVENBIT) else if (strcmp (s, "shade") == 0) ui_ToggleShade(); #endif /* MSDOS && !SEVENBIT */ else if (strcmp (s, "switch") == 0) { computer = otherside[computer]; opponent = otherside[opponent]; flag.force = false; Sdepth = 0; ok = true; } else if (strcmp (s, "white") == 0) { computer = white; opponent = black; ok = true; flag.force = false; Sdepth = 0; } else if (strcmp (s, "black") == 0) { computer = black; opponent = white; ok = true; flag.force = false; Sdepth = 0; } else if (strcmp (s, "remove") == 0 && GameCnt > 1) { Undo (); Undo (); } else if (strcmp (s, "get") == 0) GetGame (); else if (strcmp (s, "save") == 0) SaveGame (); else if (strcmp (s, "depth") == 0) ChangeSearchDepth (); else if (strcmp (s, "random") == 0) dither = 6; else if (strcmp (s, "easy") == 0) flag.easy = !flag.easy; else if (strcmp (s, "contempt") == 0) SetContempt (); /* else if (strcmp (s, "xwndw") == 0) ChangeXwindow (); */ else if (strcmp (s, "coords") == 0) { coords = !coords; UpdateDisplay (0, 0, 1, 0); } #if !defined(MSDOS) || defined(SEVENBIT) else if (strcmp (s, "stars") == 0) ui_ToggleStars(); #endif /* MSDOS && !SEVENBIT */ else if (strcmp (s, "test") == 0) { ShowMessage("Testing MoveList Speed"); TestSpeed (MoveList); ShowMessage("Testing CaptureList Speed"); TestSpeed (CaptureList); } else if (strcmp (s, "p") == 0) ShowPostnValues (); else if (strcmp (s, "debug") == 0) DoDebug (); else if (strcmp (s, "rv") == 0) ui_ToggleRV(); else ui_RejectMove(s); } ClearMessage (); ElapsedTime (1); if (flag.force) { computer = opponent; opponent = otherside[computer]; } signal (SIGINT, TerminateSearch); #ifndef MSDOS signal (SIGQUIT, TerminateSearch); #endif /* MSDOS */ } int NeedPromotion(int x, int y) { int sq=locn(y,x); return ((color[sq]==white && y==6) || (color[sq]==black && y==1)) && board[sq]==pawn; } int RankAt(int x,int y) { return board[locn(y,x)]; } int ColourAt(int x,int y) { return color[locn(y,x)]; } static int Legal[8][8]; void CalculateLegalMoves(int x,int y) // Fairly fast { for (int i=0; i<8; i++) for (int j=0; j<8; j++) Legal[i][j]=0; int pnt = TrPnt[2]; while (pnt < TrPnt[3]) { int f=Tree[pnt].f; int t=Tree[pnt].t; if (x==column(f) && y==row(f)) { Legal[column(t)][row(t)]=1; } pnt++; } } int LegalMove(int x, int y) // Very fast { return Legal[x][y]; } void ClrScreen() { ui_ClrScreen(); }