File: xboardplayer.cpp

package info (click to toggle)
brutalchess 0.5.2+dfsg-8
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, buster, sid
  • size: 7,404 kB
  • sloc: cpp: 7,561; sh: 2,707; makefile: 73; ansic: 9
file content (143 lines) | stat: -rw-r--r-- 2,603 bytes parent folder | download | duplicates (4)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
/***************************************************************************
 * Brutal Chess
 * http://brutalchess.sf.net
 *
 * File : xboardplayer.cpp
 * Authors : Mike Cook, Joe Flint, Neil Pankey
 **************************************************************************/
#ifndef WIN32

#include "board.h"
#include "chessgamestate.h"
#include "chessplayer.h"

#include <cassert>
#include <sstream>
#include <string>

#include <unistd.h>

using namespace std;


XboardPlayer::XboardPlayer()
{
	m_trustworthy = true;
}

XboardPlayer::~XboardPlayer()
{
	write(m_to[1], "quit\n", 5);
}

void XboardPlayer::newGame()
{
	runChessEngine();
}

void XboardPlayer::loadGame(const ChessGameState& cgs)
{
}

void XboardPlayer::startGame()
{
	if(m_is_white)
		write(m_to[1], "go\n", 3);
}

// Set up gnuchess
void XboardPlayer::runChessEngine()
{
	pipe( m_to );
	pipe( m_from );

	if (fork() == 0) {
		// Child Process
		nice( 20 );
		dup2( m_to[0], 0 );
		dup2( m_from[1], 1 );
		close( m_to[0] );
		close( m_to[1] );
		close( m_from[0] );
		execvp( "gnuchess", NULL );
		cerr << "Couldn't run gnuchess" << endl;
	}
	write( m_to[1], "xboard\n", 7);
	m_initialized = true;
}

// Get a move from GnuChess
void XboardPlayer::think(const ChessGameState & cgs)
{
	if (!m_initialized)
		runChessEngine();
	
	string output;
	char c;
	while ( output.substr(0, 11) != "My move is:") {
		output = "";
		while ( read( m_from[0], &c, 1 ) ) {
			if ( c == '\n' )
				break;
			output += c;
		}
		cout << output << endl;
	}
	output = output.substr(12, 5);

	cout << output << endl;
	
	// Construct a BoardMove from the move string.
	stringstream oss(output);
	int rank;
		
	oss >> c;
	oss >> rank;
	BoardPosition origin(c, rank);
	
	oss >> c;
	oss >> rank;
	BoardPosition dest(c, rank);
	
	Board b = cgs.getBoard();
	BoardMove move(origin, dest, b.getPiece(origin));
	m_move = move;
}

// Send your move to GnuChess
void XboardPlayer::opponentMove(const BoardMove & move, const ChessGameState & cgs)
{
	if (!m_initialized)
		runChessEngine();

	Board board = cgs.getBoard();
	
	Piece * piece = board.getPiece(move.dest());

	int characters = 5;
	string movestr = "";
	movestr += move.origin().filec();
	movestr += '0' + move.origin().rank();
	movestr += move.dest().filec();
	movestr += '0' + move.dest().rank();
	if(move.getPromotion() != Piece::NOTYPE) {
		movestr += 'q';
		characters++;
	}
	movestr += '\n';

	cout << movestr << endl;

	write( m_to[1], movestr.c_str(), characters);
}

void XboardPlayer::undoMove()
{
	string undo = "undo\n";
	write(m_to[1], undo.c_str(), 5);
}

#endif

// end of file xboardplayer.cpp