terminal-chess: src/game.c@3ab0c2e1a4e2

     1 /*

     2  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

     3  *

     4  * Copyright 2014 Mike Becker. All rights reserved.

     5  *

     6  * Redistribution and use in source and binary forms, with or without

     7  * modification, are permitted provided that the following conditions are met:

     8  *

     9  *   1. Redistributions of source code must retain the above copyright

    10  *      notice, this list of conditions and the following disclaimer.

    11  *

    12  *   2. Redistributions in binary form must reproduce the above copyright

    13  *      notice, this list of conditions and the following disclaimer in the

    14  *      documentation and/or other materials provided with the distribution.

    15  *

    16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

    17  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

    19  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE

    20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

    21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

    22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

    23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

    24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

    25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

    26  * POSSIBILITY OF SUCH DAMAGE.

    27  *

    28  */

    30 #include "game.h"

    31 #include "network.h"

    32 #include "input.h"

    33 #include <ncurses.h>

    34 #include <string.h>

    36 static const uint8_t boardx = 10, boardy = 10;

    38 static void draw_board(GameState *gamestate) {

    40     for (uint8_t y = 0 ; y < 8 ; y++) {

    41         for (uint8_t x = 0 ; x < 8 ; x++) {

    42             uint8_t col = gamestate->board[y][x] & COLOR_MASK;

    43             uint8_t piece = gamestate->board[y][x] & PIECE_MASK;

    44             char piecec;

    45             if (piece) {

    46                 piecec = piece == PAWN ? 'P' : getpiecechr(piece);

    47             } else {

    48                 piecec = ' ';

    49             }

    51             attrset((col == WHITE ? A_BOLD : A_DIM) |

    52                 COLOR_PAIR((y&1)==(x&1) ? COL_WB : COL_BW));

    54             int cy = gamestate->mycolor == WHITE ? boardy-y : boardy-7+y;

    55             int cx = gamestate->mycolor == WHITE ? boardx+x*3 : boardx+21-x*3;

    56             mvaddch(cy, cx, ' ');

    57             mvaddch(cy, cx+1, piecec);

    58             mvaddch(cy, cx+2, ' ');

    59         }

    60     }

    62     attrset(A_NORMAL);

    63     for (uint8_t i = 0 ; i < 8 ; i++) {

    64         int x = gamestate->mycolor == WHITE ? boardx+i*3+1 : boardx+22-i*3;

    65         int y = gamestate->mycolor == WHITE ? boardy-i : boardy-7+i;

    66         mvaddch(boardy+1, x, 'a'+i);

    67         mvaddch(y, boardx-2, '1'+i);

    68     }

    70     /* move log */

    71     // TODO: introduce window to avoid bugs with a long move log

    72     uint8_t logy = 0;

    73     const uint8_t logx = boardx + 30;

    74     int logi = 1;

    75     MoveList *logelem = gamestate->movelist;

    77     while (logelem) {

    78         logi++;

    79         if (logi % 2 == 0) {

    80             if ((logi - 2) % 4 == 0) {

    81                 logy++;

    82                 move(logy, logx);

    83             }

    84             printw("%d. ", logi / 2);

    85         }

    87         if (logelem) {

    88             Move move = logelem->move;

    89             if ((move.piece&PIECE_MASK) == KING &&

    90                 abs(move.tofile-move.fromfile) == 2) {

    91                 addstr(move.tofile==fileidx('c')?"O-O-O":"O-O");

    92             } else {

    93                 char logstr[] = {

    94                     getpiecechr(move.piece),

    95                     filechr(move.fromfile), rowchr(move.fromrow),

    96                     move.capture ? 'x':'\0',

    97                     filechr(move.tofile), rowchr(move.torow),

    98                     move.check ? '+' : (move.checkmate ? '#' :

    99                         (move.promotion ? '=' : '\0')),

   100                     move.promotion ? getpiecechr(move.promotion) : '\0'

   101                 };

   102                 for (int stri = 0 ; stri < sizeof(logstr) ; stri++) {

   103                     if (logstr[stri]) {

   104                         addch(logstr[stri]);

   105                     }

   106                 }

   107             }

   108             addch(' ');

   110             logelem = logelem->next;

   111         }

   112     }

   113 }

   116 static int sendmove(GameState *gamestate, int opponent) {

   118     const size_t buflen = 8;

   119     char movestr[buflen];

   120     _Bool remisrejected = FALSE;

   121     uint8_t code;

   123     int inputy = getmaxy(stdscr) - 6;

   124     while (1) {

   125         move(inputy, 0);

   126         if (remisrejected) {

   127             printw(

   128                 "Use chess notation to enter your move.\n"

   129                 "Remis offer rejected - type 'surr' to surrender.      \n\n"

   130                 "Type your move: ");

   131         } else {

   132             printw(

   133                 "Use chess notation to enter your move.\n"

   134                 "Or type 'surr' to surrender or 'remis' to offer remis.\n\n"

   135                 "Type your move: ");

   136         }

   137         clrtoeol();

   138         refresh();

   139         getnstr(movestr, buflen);

   141         if (strncmp(movestr, "surr", buflen) == 0) {

   142             printw("You surrendered!");

   143             clrtoeol();

   144             refresh();

   145             net_send_code(opponent, NETCODE_SURRENDER);

   146             return 1;

   147         } else if (strncmp(movestr, "remis", buflen) == 0) {

   148             if (!remisrejected) {

   149                 net_send_code(opponent, NETCODE_REMIS);

   150                 printw("Remis offer sent - waiting for acceptance...");

   151                 refresh();

   152                 if (net_recieve_code(opponent) == NETCODE_ACCEPT) {

   153                     printw("\rRemis accepted!");

   154                     clrtoeol();

   155                     refresh();

   156                     return 1;

   157                 } else {

   158                     remisrejected = TRUE;

   159                 }

   160             }

   161         } else {

   162             Move move;

   163             int eval_result = eval_move(gamestate, movestr, &move);

   164             switch (eval_result) {

   165             case VALID_MOVE_SYNTAX:

   166                 net_send_data(opponent, NETCODE_MOVE, &move, sizeof(Move));

   167                 code = net_recieve_code(opponent);

   168                 move.check = code == NETCODE_CHECK;

   169                 move.checkmate = code == NETCODE_CHECKMATE;

   170                 if (code == NETCODE_DECLINE) {

   171                     printw("Invalid move.");

   172                 } else {

   173                     apply_move(gamestate, &move);

   174                     if (move.checkmate) {

   175                         printw("Checkmate!");

   176                         clrtoeol();

   177                         return 1;

   178                     } else {

   179                         return 0;

   180                     }

   181                 }

   182                 break;

   183             case AMBIGUOUS_MOVE:

   184                 printw("Ambiguous move - please specify the piece to move.");

   185                 break;

   186             case INVALID_POSITION:

   187                 printw("Cannot find the piece that shall be moved.");

   188                 break;

   189             case NEED_PROMOTION:

   190                 printw("You need to promote the pawn (append \"=Q\" e.g.)!");

   191                 break;

   192             default:

   193                 printw("Can't interpret move - please use algebraic notation.");

   194             }

   195             clrtoeol();

   196         }

   197     }

   198 }

   200 static int recvmove(GameState *gamestate, int opponent) {

   202     int inputy = getmaxy(stdscr) - 6;

   203     while (1) {

   204         move(inputy, 0);

   205         printw("Awaiting opponent move...");

   206         clrtoeol();

   207         refresh();

   209         // TODO: nonblocking

   210         uint32_t code = net_recieve_code(opponent);

   212         Move move;

   213         switch (code) {

   214             case NETCODE_SURRENDER:

   215                 printw("\rYour opponent surrendered!");

   216                 clrtoeol();

   217                 return 1;

   218             case NETCODE_REMIS:

   219                 if (prompt_yesno(

   220                     "\rYour opponent offers remis - do you accept")) {

   221                     printw("\rRemis accepted!");

   222                     clrtoeol();

   223                     net_send_code(opponent, NETCODE_ACCEPT);

   224                     return 1;

   225                 } else {

   226                     net_send_code(opponent, NETCODE_DECLINE);

   227                 }

   228                 break;

   229             case NETCODE_MOVE:

   230                 net_recieve_data(opponent, &move, sizeof(Move));

   231                 if (validate_move(gamestate, &move)) {

   232                     apply_move(gamestate, &move);

   233                     if (move.check) {

   234                         net_send_code(opponent, NETCODE_CHECK);

   235                     } else if (move.checkmate) {

   236                         net_send_code(opponent, NETCODE_CHECKMATE);

   237                     } else {

   238                         net_send_code(opponent, NETCODE_ACCEPT);

   239                     }

   240                     return 0;

   241                 } else {

   242                     net_send_code(opponent, NETCODE_DECLINE);

   243                 }

   244         }

   245     }

   246 }

   248 void game_start(Settings *settings, int opponent) {

   249     _Bool myturn = is_server(settings) ==

   250         (settings->gameinfo.servercolor == WHITE);

   252     GameState gamestate;

   253     Board initboard = {

   254         {WROOK, WKNIGHT, WBISHOP, WQUEEN, WKING, WBISHOP, WKNIGHT, WROOK},

   255         {WPAWN, WPAWN,   WPAWN,   WPAWN,  WPAWN, WPAWN,   WPAWN,   WPAWN},

   256         {0,     0,       0,       0,      0,     0,       0,       0},

   257         {0,     0,       0,       0,      0,     0,       0,       0},

   258         {0,     0,       0,       0,      0,     0,       0,       0},

   259         {0,     0,       0,       0,      0,     0,       0,       0},

   260         {BPAWN, BPAWN,   BPAWN,   BPAWN,  BPAWN, BPAWN,   BPAWN,   BPAWN},

   261         {BROOK, BKNIGHT, BBISHOP, BQUEEN, BKING, BBISHOP, BKNIGHT, BROOK}

   262     };

   263     memcpy(gamestate.board, initboard, sizeof(Board));

   264     gamestate.mycolor = myturn ? WHITE:BLACK;

   265     gamestate.movelist = gamestate.lastmove = NULL;

   267     _Bool running;

   268     do {

   269         clear();

   270         draw_board(&gamestate);

   271         if (myturn) {

   272             running = !sendmove(&gamestate, opponent);

   273         } else {

   274             running = !recvmove(&gamestate, opponent);

   275             flushinp(); // flush any input the user hacked in while waiting

   276         }

   277         myturn ^= TRUE;

   278     }  while (running);

   280     gamestate_cleanup(&gamestate);

   282     mvaddstr(getmaxy(stdscr)-1, 0,

   283         "Game has ended. Press any key to leave...");

   284     getch();

   285 }

Mercurial > hg > terminal-chess / file revision

src/game.c@3ab0c2e1a4e2

src/game.c