interface/play_gmp.c

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
 * This is GNU Go, a Go program. Contact gnugo@gnu.org, or see       *
 * http://www.gnu.org/software/gnugo/ for more information.          *
 *                                                                   *
 * Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,   *
 * 2008 and 2009 by the Free Software Foundation.                    *
 *                                                                   *
 * This program is free software; you can redistribute it and/or     *
 * modify it under the terms of the GNU General Public License as    *
 * published by the Free Software Foundation - version 3 or          *
 * (at your option) any later version.                               *
 *                                                                   *
 * This program is distributed in the hope that it will be useful,   *
 * but WITHOUT ANY WARRANTY; without even the implied warranty of    *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the     *
 * GNU General Public License in file COPYING for more details.      *
 *                                                                   *
 * You should have received a copy of the GNU General Public         *
 * License along with this program; if not, write to the Free        *
 * Software Foundation, Inc., 51 Franklin Street, Fifth Floor,       *
 * Boston, MA 02111, USA.                                            *
\* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

#include "gnugo.h"
#include "liberty.h"

#include <assert.h>
#include <stdio.h>
#include <stdlib.h>

#include "gg_utils.h"
#include "gmp.h"
#include "interface.h"
#include "sgftree.h"

/* --------------------------------------------------------------*/
/* Play a game against a go-modem-protocol (GMP) client.         */
/* --------------------------------------------------------------*/
void play_gmp(Gameinfo* gameinfo, int simplified)
{
    SGFTree sgftree;

    Gmp* ge;
    GmpResult message;
    const char* error;

    int i, j;
    int passes = 0; /* two passes and its over */
    int to_move; /* who's turn is next ? */

    int mycolor = -1; /* who has which color */
    int yourcolor;

    if (gameinfo->computer_player == WHITE)
        mycolor = 1;
    else if (gameinfo->computer_player == BLACK)
        mycolor = 0;

    sgftree_clear(&sgftree);
    sgftreeCreateHeaderNode(&sgftree, board_size, komi, gameinfo->handicap);

    ge = gmp_create(0, 1);
    TRACE("board size=%d\n", board_size);

    /*
   * The specification of the go modem protocol doesn't even discuss
   * komi. So we have to guess the komi. If the komi is set on the
   * command line, keep it. Otherwise, its value will be 0.0 and we
   * use 5.5 in an even game, 0.5 otherwise.
   */
    if (komi == 0.0) {
        if (gameinfo->handicap == 0)
            komi = 5.5;
        else
            komi = 0.5;
    }

    if (!simplified) {
        /* Leave all the -1's so the client can negotiate the game parameters. */
        if (chinese_rules)
            gmp_startGame(ge, -1, -1, 5.5, -1, mycolor, 0);
        else
            gmp_startGame(ge, -1, -1, 5.5, 0, mycolor, 0);
    } else {
        gmp_startGame(ge, board_size, gameinfo->handicap,
            komi, chinese_rules, mycolor, 1);
    }

    do {
        message = gmp_check(ge, 1, NULL, NULL, &error);
    } while (message == gmp_nothing || message == gmp_reset);

    if (message == gmp_err) {
        fprintf(stderr, "gnugo-gmp: Error \"%s\" occurred.\n", error);
        exit(EXIT_FAILURE);
    } else if (message != gmp_newGame) {
        fprintf(stderr, "gnugo-gmp: Expecting a newGame, got %s\n",
            gmp_resultString(message));
        exit(EXIT_FAILURE);
    }

    gameinfo->handicap = gmp_handicap(ge);
    if (!check_boardsize(gmp_size(ge), stderr))
        exit(EXIT_FAILURE);

    gnugo_clear_board(gmp_size(ge));

    /* Let's pretend GMP knows about komi in case something will ever change. */
    komi = gmp_komi(ge);

#if ORACLE
    if (metamachine && oracle_exists)
        oracle_clear_board(board_size);
#endif

    sgfOverwritePropertyInt(sgftree.root, "SZ", board_size);

    TRACE("size=%d, handicap=%d, komi=%f\n", board_size,
        gameinfo->handicap, komi);

    if (gameinfo->handicap)
        to_move = WHITE;
    else
        to_move = BLACK;

    if (gmp_iAmWhite(ge)) {
        mycolor = WHITE; /* computer white */
        yourcolor = BLACK; /* human black */
    } else {
        mycolor = BLACK;
        yourcolor = WHITE;
    }

    gameinfo->computer_player = mycolor;
    sgf_write_header(sgftree.root, 1, get_random_seed(), komi,
        gameinfo->handicap, get_level(), chinese_rules);
    gameinfo->handicap = gnugo_sethand(gameinfo->handicap, sgftree.root);
    sgfOverwritePropertyInt(sgftree.root, "HA", gameinfo->handicap);

    /* main GMP loop */
    while (passes < 2) {

        if (to_move == yourcolor) {
            int move;
            /* Get opponent's move from gmp client. */
            message = gmp_check(ge, 1, &j, &i, &error);

            if (message == gmp_err) {
                fprintf(stderr, "GNU Go: Sorry, error from gmp client\n");
                sgftreeAddComment(&sgftree, "got error from gmp client");
                sgffile_output(&sgftree);
                return;
            }

            if (message == gmp_undo) {
                int k;
                assert(j > 0);

                for (k = 0; k < j; k++) {
                    if (!undo_move(1)) {
                        fprintf(stderr, "GNU Go: play_gmp UNDO: can't undo %d moves\n",
                            j - k);
                        break;
                    }
                    sgftreeAddComment(&sgftree, "undone");
                    sgftreeBack(&sgftree);
                    to_move = OTHER_COLOR(to_move);
                }
                continue;
            }

            if (message == gmp_pass) {
                passes++;
                move = PASS_MOVE;
            } else {
                passes = 0;
                move = POS(i, j);
            }

            TRACE("\nyour move: %1m\n\n", move);
            sgftreeAddPlay(&sgftree, to_move, I(move), J(move));
            gnugo_play_move(move, yourcolor);
            sgffile_output(&sgftree);

        } else {
            /* Generate my next move. */
            float move_value;
            int move;
            if (autolevel_on)
                adjust_level_offset(mycolor);
            move = genmove(mycolor, &move_value, NULL);
            gnugo_play_move(move, mycolor);
            sgffile_add_debuginfo(sgftree.lastnode, move_value);

            if (is_pass(move)) {
                /* pass */
                sgftreeAddPlay(&sgftree, to_move, -1, -1);
                gmp_sendPass(ge);
                ++passes;
            } else {
                /* not pass */
                sgftreeAddPlay(&sgftree, to_move, I(move), J(move));
                gmp_sendMove(ge, J(move), I(move));
                passes = 0;
                TRACE("\nmy move: %1m\n\n", move);
            }
            sgffile_add_debuginfo(sgftree.lastnode, 0.0);
            sgffile_output(&sgftree);
        }

        to_move = OTHER_COLOR(to_move);
    }

    /* two passes: game over */
    gmp_sendPass(ge);

    if (!quiet)
        fprintf(stderr, "Game over - waiting for client to shut us down\n");
    who_wins(mycolor, stderr);

    if (showtime) {
        gprintf("\nSLOWEST MOVE: %d at %1m ", slowest_movenum, slowest_move);
        fprintf(stderr, "(%.2f seconds)\n", slowest_time);
        fprintf(stderr, "\nAVERAGE TIME: %.2f seconds per move\n",
            total_time / movenum);
        fprintf(stderr, "\nTOTAL TIME: %.2f seconds\n",
            total_time);
    }

    /* play_gmp() does not return to main(), therefore the score
   * writing code is here.
   */
    {
        float score = gnugo_estimate_score(NULL, NULL);
        sgfWriteResult(sgftree.root, score, 1);
    }
    sgffile_output(&sgftree);

    if (!simplified) {
        /* We hang around here until cgoban asks us to go, since
     * sometimes cgoban crashes if we exit first.
     *
     * FIXME: Check if this is still needed.  I made it dependand on
     *        `simplifed' just to avoid changes in GMP mode.
     */
        while (1) {
            message = gmp_check(ge, 1, &j, &i, &error);
            if (!quiet)
                fprintf(stderr, "Message %d from gmp\n", message);
            if (message == gmp_err)
                break;
        }
    }

#if ORACLE
    if (metamachine && oracle_exists)
        dismiss_oracle();
#endif

    if (!quiet)
        fprintf(stderr, "gnugo going down\n");
}

/*
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 * c-basic-offset: 4
 * End:
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