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$RCSfile: gnuglue.m,v $
Chess
Copyright (c) 2000-2001 Apple Computer. All rights reserved.
*/
#import <AppKit/AppKit.h> // NSBeep
/* own interface */
#import "gnuglue.h"
/* types, constants & external variables */
#import "gnuchess.h"
/* Application */
#import "Chess.h" // NSApp
/* UNIX/C functions */
#import <stdio.h> // fopen, fclose, fprintf, fscanf
#import <signal.h> // signal
#import <time.h> // time
#import <math.h> // floor
#import <libc.h> // getuid, usleep
#import <pwd.h> // getpwuid, passwd
#ifdef PROFILE
#import <libc.h> // times, tms
static struct tms tmbuf1, tmbuf2;
#endif
/* castles */
#define NO_CASTLE 0x0
#define LEFT_CASTLE 0x1
#define RIGHT_CASTLE 0x2
/* external functions (gnuchess.c) */
extern void gnuchess_main_init();
extern void NewGame();
extern void algbr();
extern int VerifyMove();
extern int castle();
extern int distance();
extern void InitializeStats();
extern int SqAtakd();
extern void SelectMoveStart();
extern int SelectMoveEnd();
extern void SelectLoop();
/* static variables */
static struct MoveInfo move_info;
static struct BookEntry *book_entries;
static short GameQueens[240];
/* private functions */
static NSString * computerMove()
{
if( mvstr1[0] )
return [NSString stringWithCString: (const char *) mvstr1];
return nil;
}
/* (not used)
static NSString * opponentMove()
{
if( mvstr2[0] )
return [NSString stringWithCString: (const char *) mvstr2];
return nil;
}
*/
static void convert_move( move, row1, col1, row2, col2, castle_flag )
NSString *move;
int *row1, *col1;
int *row2, *col2;
int *castle_flag;
{
int type = no_piece;
if( [move isEqual: @"o-o"] )
*castle_flag = RIGHT_CASTLE;
else if( [move isEqual: @"o-o-o"] )
*castle_flag = LEFT_CASTLE;
else {
char *algbr = (char *) [move cString];
if( algbr && *algbr ) {
*col1 = algbr[0] - 'a';
*row1 = algbr[1] - '0' - 1;
*col2 = algbr[2] - 'a';
*row2 = algbr[3] - '0' - 1;
*castle_flag = NO_CASTLE;
type = [NSApp pieceTypeAt: *row1 : *col1];
}
}
if( type ) {
#ifdef NeXT_DEBUG
NSLog( @"Piece type: #endif
if( type == king ) {
if( *col1 == 4 && *col2 == 6 )
*castle_flag = RIGHT_CASTLE;
else if( *col1 == 4 && *col2 == 2 )
*castle_flag = LEFT_CASTLE;
}
}
return;
}
static const char * sPieceChars[] = {
"",
"",
"N",
"B",
"R",
"Q",
"K"
};
static NSString * _convert_rowcol( row1, col1, row2, col2, type )
int row1, col1;
int row2, col2;
int type;
{
char algbr [6];
if( type == king && col1 == 4 ) {
if( col2 == 6 )
return @"o-o";
if( col2 == 2 )
return @"o-o-o";
}
sprintf(algbr, " 'a' + col1, '0' + row1 + 1,
'a' + col2, '0' + row2 + 1);
return [NSString stringWithCString: (const char *) algbr];
}
static unsigned short convert_string( string, side )
NSString *string;
int side;
{
unsigned short move = 0;
if( [string isEqual: @"o-o-o"] )
move = ( side == black ) ? 0x3C3A : 0x0402;
else if( [string isEqual: @"o-o"] )
move = ( side == black ) ? 0x3C3E : 0x0406;
else {
char *algbr = (char *)[string cString];
if( algbr && *algbr ) {
int r1, r2, c1, c2;
c1 = algbr[0] - 'a';
r1 = algbr[1] - '1';
c2 = algbr[2] - 'a';
r2 = algbr[3] - '1';
move = (unsigned short)((locn[r1][c1] << 8) + locn[r2][c2]);
}
}
return move;
}
/* (not used)
static NSZone * create_zone()
{
unsigned pageSize = NSPageSize();
unsigned granularity = pageSize;
BOOL canFree = NO; // no dynamic free
NSZone *zone = NSCreateZone( pageSize, granularity, canFree );
if( zone )
return zone;
NSLog( @"Zone cannot be created: size = return (NSZone *) NULL;
}
*/
static struct BookEntry * create_book_entry ( moves )
NSArray *moves;
{
unsigned moveCount = [moves count];
if( moveCount ) {
struct BookEntry *entry;
unsigned short *movep;
unsigned entrySize = sizeof(struct BookEntry);
unsigned moveSize = (moveCount + 1) * sizeof(unsigned short);
NSZone *zone = NSDefaultMallocZone(); // ??
// NSZone *zone = [self zone];
entry = (struct BookEntry *)NSZoneMalloc( zone, entrySize );
movep = (unsigned short *) NSZoneMalloc( zone, moveSize );
if( entry && movep ) {
unsigned index;
// entry->next = book_entries;
entry->mv = movep;
for( index = 0; index < moveCount; index++ )
*(movep++) = [[moves objectAtIndex:index] unsignedShortValue];
*movep = 0;
return entry;
}
NSLog( @"Memory cannot be allocated: zone = }
return (struct BookEntry *)NULL;
}
/*
Functions invoked by gnuchess.c modules
*/
void OutputMove()
{
int row1, col1, row2, col2, castle_flag;
NSString *move = computerMove();
#ifdef NeXT_DEBUG
NSLog( @"OutputMove: Computer move is #endif
if( root->flags & draw )
[NSApp setFinished: DRAW_GAME];
[NSApp fillResponseMeter: player];
if( ! move || [move isEqual: @""] ) {
#ifdef NeXT_DEBUG
NSLog( @"NO COMPUTER MOVE" );
#endif
return;
}
convert_move( move, &row1, &col1, &row2, &col2, &castle_flag );
[NSApp movePieceFrom: row1 : col1 to: row2 : col2];
switch (castle_flag ) {
case NO_CASTLE:
break;
case LEFT_CASTLE:
[NSApp movePieceFrom: row1 : 0 to: row2 : 3];
break;
case RIGHT_CASTLE:
[NSApp movePieceFrom: row1 : 7 to: row2 : 5];
break;
}
#ifdef NeXT_DEBUG
NSLog( @"White has NSLog( @"Black has #endif
return;
}
void SelectLevel()
{
#ifdef NeXT_DEBUG
NSLog( @"SelectLevel" );
#endif
return;
}
void UpdateClocks()
{
#ifdef NeXT_DEBUG
NSLog( @"UpdateClocks" );
#endif
return;
}
void ElapsedTime( 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;
if( et < 0 )
et = 0;
ETnodes += 50;
if( ! iop )
[NSApp displayResponseMeter: player];
#ifdef NeXT_DEBUG
NSLog( @"ResponseTime #endif
if( et > et0 || iop == 1 ) {
if( et > ResponseTime+ExtraTime && Sdepth > 1 )
timeout = true;
et0 = et;
if( iop == 1 ) {
time0 = time((long *)0);
et0 = 0;
}
#ifdef PROFILE
(void)times( &tmbuf2 );
cputimer = 100 * (tmbuf2.tms_utime - tmbuf1.tms_utime) / HZ;
if( cputimer > 0 )
evrate = (100 * NodeCnt) / (cputimer + 100 * ft);
else
evrate = 0;
#endif
ETnodes = NodeCnt + 50;
UpdateClocks();
}
[NSApp peekAndGetLeftMouseDownEvent];
return;
}
void SetTimeControl()
{
short moves;
long clock;
#ifdef NeXT_DEBUG
NSLog( @"SetTimeControl" );
#endif
if( TCflag ) {
moves = TCmoves;
clock = 60 * (long)TCminutes;
}
else {
moves = 0;
clock = 0;
Level = 60 * (long)TCminutes;
}
TimeControl.moves[white] = TimeControl.moves[black] = moves;
TimeControl.clock[white] = TimeControl.clock[black] = clock;
et = 0;
ElapsedTime(1);
return;
}
void ShowResults( short score, unsigned short bstline[], char ch )
{
#ifdef NeXT_DEBUG
NSLog( @"ShowResults: score = #endif
return;
}
void GameEnd( short score )
{
int gameStatus = 0;
NSBeep();
if( root->flags & draw )
gameStatus = DRAW_GAME;
else if( score == 9998 ) {
NSLog( @"score gameStatus = ( winner == black ) ? BLACK_MATE : WHITE_MATE;
}
else if( score == -9999 ) {
if( bothsides ) {
NSLog( @"score if( winner != -1 )
gameStatus = ( winner == white ) ? WHITE_MATE : BLACK_MATE;
else
gameStatus = WHITE_MATE;
}
else
gameStatus = OPPONENT_MATE;
}
[NSApp setFinished: gameStatus];
return;
}
void ClrScreen()
{
#ifdef NeXT_DEBUG
NSLog( @"ClrScreen" );
#endif
return;
}
void UpdateDisplay( int f, int t, int flag, int iscastle )
{
#ifdef NeXT_DEBUG
NSLog( @"UpdateDisplay: from #endif
[NSApp updateBoard];
return;
}
void GetOpenings()
/*
Read in the Opening Book file and parse the algebraic notation for a
move into an unsigned integer format indicating the from and to
square. Create a linked list of opening lines of play, with
entry->next pointing to the next line and entry->move pointing to a
chunk of memory containing the moves. More Opening lines of up to 256
half moves may be added to gnuchess.book.
*/
{
NSBundle *bundle;
NSString *path;
NSString *book;
NSScanner *scanner;
NSMutableArray *moveList;
int side;
if( book_entries ) {
Book = book_entries;
return;
}
bundle = [NSBundle mainBundle];
path = [bundle pathForResource: @"gnuchess" ofType: @"book"];
book = [NSString stringWithContentsOfFile: path];
scanner = [NSScanner scannerWithString: book];
if( ! book || ! scanner )
return;
moveList = [NSMutableArray arrayWithCapacity: 0];
side = white;
// book_entries = NULL;
while( ! [scanner isAtEnd] ) {
NSString *textLine;
if( ! [scanner scanUpToString: @"\n" intoString: &textLine] )
continue;
if( [textLine isEqual: @"\n"] || [textLine hasPrefix: @"!"] ) {
struct BookEntry *entry = create_book_entry( moveList );
if( entry ) {
entry->next = book_entries;
book_entries = entry;
side = white;
[moveList removeAllObjects];
}
}
else {
unsigned idx;
NSArray *substrings = [textLine componentsSeparatedByString: @" "];
for( idx = 0; idx < [substrings count]; idx++ ) {
unsigned short move;
NSString *string = (NSString *)[substrings objectAtIndex: idx];
if( [string isEqual: @""] )
continue;
move = convert_string( string, side );
if( move ) {
NSNumber *number = [NSNumber numberWithUnsignedShort:move];
[moveList addObject: (id)number];
}
side = otherside[side];
}
}
}
Book = book_entries;
return;
}
void ShowDepth( char ch )
{
#ifdef NeXT_DEBUG
NSLog( @"ShowDepth: #endif
return;
}
void ShowCurrentMove( short pnt, short f, short t )
{
#ifdef NeXT_DEBUG
algbr( f, t, false );
NSLog( @"ShowCurrentMove: (#endif
return;
}
void ShowSidetomove()
{
#ifdef NeXT_DEBUG
NSString *colorStr = ( player == white ) ? @"WHITE" : @"BLACK";
NSLog( @"ShowSidetomove: #endif
return;
}
static void show_message( NSString *str )
{
#ifdef NeXT_DEBUG
NSLog( @"ShowMessage: #endif
[NSApp setTitleMessage: str];
return;
}
void ShowMessage( const char *s )
{
show_message( [NSString stringWithCString: s] );
return;
}
static void ExitChess()
{
[NSApp terminate: NSApp];
exit(0);
}
static void Die()
{
if( [NSApp canFinishGame] ) {
signal( SIGINT, SIG_IGN );
signal( SIGQUIT, SIG_IGN );
ExitChess();
}
return;
}
static void TerminateSearch()
{
signal( SIGINT, SIG_IGN );
signal( SIGQUIT, SIG_IGN );
timeout = true;
signal( SIGINT, Die ); /* Die() */
signal( SIGQUIT, Die );
return;
}
void SearchStartStuff( short side )
{
signal( SIGINT, TerminateSearch ); /* TerminateSearch() */
signal( SIGQUIT, TerminateSearch );
return;
}
/*
Functions invoked by Chess.app modules
*/
void init_gnuchess ()
{
gnuchess_main_init();
return;
}
void new_game ()
{
NewGame();
return;
}
void in_check ()
{
int incheck = -1;
if( SqAtakd( PieceList[computer][0], opponent ) )
incheck = computer;
if( SqAtakd( PieceList[opponent][0], computer ) )
incheck = opponent;
if( incheck == black )
show_message( @"Black is in check" );
else if( incheck == white )
show_message( @"White is in check" );
return;
}
void get_game ( NSString *filename )
{
NSFileManager *fileMgr;
const char *path;
FILE *fd;
int sq;
int c;
fileMgr = [NSFileManager defaultManager];
if( ! [fileMgr fileExistsAtPath: filename] ) {
NSLog( @"file ` return;
}
if( ! [fileMgr isReadableFileAtPath: filename] ) {
NSLog( @"file ` return;
}
path = [filename cString];
if( ! path || ! *path ) {
NSLog( @"filename ` return;
}
fd = fopen( path, "r" );
if( ! fd ) {
NSLog( @"file ` return;
}
(void)fscanf( fd, " (void)fscanf( fd, " (void)fscanf( fd, " (void)fscanf( fd, " (void)fscanf( fd, " (void)fscanf( fd, " (void)fscanf( fd, " (void)fscanf( fd, " (void)fscanf( fd, "
for( sq = 0; sq < 64; sq++ ) {
unsigned short m;
(void)fscanf( fd, " board[sq] = (short)( m >> 8 );
color[sq] = (short)( m & 0xff );
if( ! color[sq] )
color[sq] = neutral;
else
color[sq]--;
}
[NSApp updateBoard];
GameCnt = -1;
c = '?';
while( c != EOF ) {
struct GameRec *game = &GameList[++GameCnt];
c = fscanf( fd," &game->gmove, &game->score, &game->depth, &game->nodes,
&game->time, &game->piece, &game->color );
if( ! game->color )
game->color = neutral;
else
(game->color)--;
}
GameCnt--;
if( TimeControl.clock[white] > (long)0 )
TCflag = true;
computer--;
opponent--;
(void)fclose( fd );
InitializeStats();
UpdateDisplay( 0, 0, 1, 0 );
Sdepth = 0;
return;
}
int save_game ( NSString *filename )
{
NSFileManager *fileMgr;
const char *path;
FILE *fd;
int sq;
int i;
fileMgr = [NSFileManager defaultManager];
if( [fileMgr fileExistsAtPath: filename] ) {
if( ! [fileMgr isWritableFileAtPath: filename] ) {
NSLog( @"file ` return( 0 );
}
}
path = [filename cString];
if( ! path || ! *path ) {
NSLog( @"filename ` return( 0 );
}
fd = fopen( path, "w" );
if( ! fd ) {
NSLog( @"file ` return( 0 );
}
(void)fprintf( fd, " (void)fprintf( fd, " (void)fprintf( fd, " (void)fprintf( fd, " (void)fprintf( fd, " (void)fprintf( fd, " (void)fprintf( fd, " (void)fprintf( fd, " (void)fprintf( fd, "
for( sq = 0; sq < 64; sq++ ) {
unsigned short m = ( color[sq] == neutral ) ? 0 : color[sq] + 1;
m += 256 * board[sq];
(void)fprintf( fd, " }
for( i = 0; i <= GameCnt; i++ ) {
struct GameRec *game = &GameList[i];
short clr = ( game->color == neutral ) ? 0 : game->color + 1;
(void)fprintf( fd, " game->gmove, game->score, game->depth, game->nodes,
game->time, game->piece, clr );
}
(void)fclose( fd );
return( 1 );
}
int list_game ( NSString *filename )
{
NSFileManager *fileMgr;
const char *path;
FILE *fd;
int i;
fileMgr = [NSFileManager defaultManager];
if( [fileMgr fileExistsAtPath: filename] ) {
if( ! [fileMgr isWritableFileAtPath: filename] ) {
NSLog( @"file ` return( 0 );
}
}
path = [filename cString];
if( ! path || ! *path ) {
NSLog( @"filename ` return( 0 );
}
fd = fopen( path, "w" );
if( ! fd ) {
NSLog( @"file ` return( 0 );
}
(void)fprintf( fd, "\n" );
(void)fprintf( fd, " score depth nodes time" );
(void)fprintf( fd, " " );
(void)fprintf( fd, " score depth nodes time");
(void)fprintf( fd, "\n" );
for( i = 0; i <= GameCnt; i++ ) {
struct GameRec *game = &GameList[i];
short from = (short)( game->gmove >> 8 );
short to = (short)( game->gmove & 0xff );
algbr( from, to, false );
if( ! (i (void)fprintf( fd, "\n" );
else
(void)fprintf( fd, " " );
(void)fprintf( fd, " mvstr1, game->score, game->depth, game->nodes, game->time );
}
(void)fprintf( fd, "\n" );
(void)fprintf( fd, "\n" );
(void)fclose( fd );
return( 1 );
}
void undo_move ()
/*
Undo the most recent half-move.
*/
{
struct GameRec *game = &GameList[GameCnt];
short from = (short)( game->gmove >> 8 );
short to = (short)( game->gmove & 0xff );
if( board[to] == king && distance(to, from) > 1 ) {
(void)castle( game->color, from, to, (short)2 );
}
else {
board[from] = board[to];
color[from] = color[to];
board[to] = game->piece;
color[to] = game->color;
if ( GameQueens[GameCnt] )
board[from] = GameQueens[GameCnt];
if (board[from] == king)
--kingmoved[color[from]];
}
if( TCflag )
++TimeControl.moves[color[from]];
GameCnt--;
mate = false;
Sdepth = 0;
if ( [NSApp finished] )
[NSApp setFinished: 0];
UpdateDisplay( 0, 0, 1, 0 );
InitializeStats();
return;
}
int give_hint ()
{
if( hint ) {
short from = (short)( hint >> 8 );
short to = (short)( hint & 0xff );
algbr( from, to, false );
#ifdef NeXT_DEBUG
NSLog( @"hint: #endif
[NSApp highlightSquareAt: (int)(from / 8) : (int)(from [NSApp highlightSquareAt: (int)(to / 8) : (int)(to }
return (int) hint;
}
NSString * convert_rowcol ( row1, col1, row2, col2, type )
int row1, col1;
int row2, col2;
int type;
{
return _convert_rowcol( row1, col1, row2, col2, type );
}
BOOL verify_move( move )
NSString *move;
{
unsigned short mv;
char *str = (char *)[move cString];
int verify = VerifyMove( str+(strlen(str)>4 && str[0] != 'o'), (short)0, &mv );
return ( verify == true ) ? YES : NO;
}
void select_move_start ( side, iop )
int side;
int iop;
{
move_info.side = (short) side;
move_info.alpha = (short) 0;
move_info.beta = (short) 0;
move_info.iop = (short) iop;
move_info.rpt = (short) 0;
Sdepth = 0;
SelectMoveStart( &move_info );
return;
}
void select_move_end ()
{
(void)SelectMoveEnd( &move_info );
return;
}
BOOL select_loop_end ()
{
return (BOOL)(timeout || Sdepth >= MaxSearchDepth);
}
void select_loop ()
{
SelectLoop( &move_info );
return;
}
void run_computer_game ()
{
quit = false;
while( ! mate && ! quit && ! [NSApp finished] )
[NSApp selectMove: player iop: 1];
quit = true;
timeout = true;
return;
}
void stop_computer_game ()
{
quit = true;
timeout = true;
return;
}
void select_computer_move ()
{
Sdepth = 0;
ft = 0;
if( ! quit && ! mate && ! force )
[NSApp selectMove: computer iop: 1];
return;
}
int current_player ()
{
return (int)player;
}
int game_count ()
{
return (int)GameCnt;
}
int move_time ()
{
return (int)GameList[GameCnt].time;
}
int response_time ()
{
return (int)( ResponseTime + ExtraTime );
}
void reset_response_time ()
{
ResponseTime = 0;
ExtraTime = 0;
return;
}
int elapsed_time ()
{
return (int)et;
}
short *default_pieces ()
{
return Stboard;
}
short *default_colors ()
{
return Stcolor;
}
short *current_pieces ()
{
return board;
}
short *current_colors ()
{
return color;
}
int game_level ()
{
return (int) Level;
}
void set_game_level ( level )
int level;
{
Level = (long) level;
return;
}
void interpret_level ( level, moves, minutes )
int level;
int *moves;
int *minutes;
{
switch( level ) {
case 1 : *moves = 60; *minutes = 5; break;
case 2 : *moves = 60; *minutes = 15; break;
case 3 : *moves = 60; *minutes = 30; break;
case 4 : *moves = 40; *minutes = 30; break;
case 5 : *moves = 40; *minutes = 60; break;
case 6 : *moves = 40; *minutes = 120; break;
case 7 : *moves = 40; *minutes = 240; break;
case 8 : *moves = 1; *minutes = 15; break;
case 9 : *moves = 1; *minutes = 60; break;
case 10 : *moves = 1; *minutes = 600; break;
default : *moves = 0; *minutes = 0; break;
}
return;
}
void set_preferences ( prefs )
struct Preferences *prefs;
{
if( prefs ) {
TCmoves = (short)prefs->time_cntl_moves;
TCminutes = (short)prefs->time_cntl_minutes;
TCflag = (short)( TCmoves > 1 );
SetTimeControl();
bothsides = (short)prefs->bothsides;
opponent = (short)prefs->opponent;
computer = (short)prefs->computer;
}
return;
}
void set_timeout( flag )
BOOL flag;
{
timeout = (short)flag;
return;
}
void set_game_queen( piece )
int piece;
{
GameQueens[GameCnt] = (short)piece;
return;
}
NSString *copyright_text ()
{
NSBundle *bundle = [NSBundle mainBundle];
NSString *path = [bundle pathForResource: @"COPYING" ofType: nil];
if( path ) {
NSString *string = [NSString stringWithContentsOfFile: path];
if( string )
return string;
}
return nil;
}
void sleep_microsecs ( microsecs )
unsigned microsecs;
{
(void) usleep( microsecs );
return;
}
int floor_value ( value )
double value;
{
return (int) floor( value );
}
// Local Variables:
// tab-width: 8
// End: