game.c

Gnome的一个单人纸牌游戏。

#include <config.h>
#include "game.h"


/**
 * clear_board: 
 * @app: the application struct
 * 
 * function description: mark the fields 
 *
 * return values: nothing 
 */
void
clear_board(GoalApp *app)
{

	gint x, y;

	if(app == NULL) return;

	for (x=0; x<=1; x++)
		for(y=0; y<=1; y++)
			app->game.CellStatus[x][y]       = UNKOWN;
	for (x=5; x<=6; x++)
		for(y=0; y<=1; y++)
			app->game.CellStatus[x][y]       = UNKOWN;

	for (x=0; x<=1; x++)
		for(y=5; y<=6; y++)
			app->game.CellStatus[x][y]       = UNKOWN;
	for (x=5; x<=6; x++)
		for(y=5; y<=6; y++)
			app->game.CellStatus[x][y]       = UNKOWN;

				
	for (x=2; x<=4; x++)
		for(y=0; y<=1; y++)
			app->game.CellStatus[x][y]       = EMPTY;
	for (x=0; x<=6; x++)
		for(y=2; y<=4; y++)
			app->game.CellStatus[x][y]       = EMPTY;
	for (x=2; x<=4; x++)
		for(y=5; y<=6; y++)
			app->game.CellStatus[x][y]       = EMPTY;


}

/**
 * init_new_game: 
 * @app: the application struct
 * 
 * function description: set standart values for each game type
 *
 * return values: nothing 
 */
void init_new_game(GoalApp *app)
{
	
	gint x, y;
	
	switch(app->game.GameType)
	{
		case CROSS :
			clear_board(app); /* clear all */
			app->game.CellStatus[3][1] = OCCUPIED;
			app->game.CellStatus[2][2] = OCCUPIED;
			app->game.CellStatus[3][2] = OCCUPIED;
			app->game.CellStatus[4][2] = OCCUPIED;
			app->game.CellStatus[3][3] = OCCUPIED;
			app->game.CellStatus[3][4] = OCCUPIED;

			gtk_window_set_title(GTK_WINDOW(app->gui.MainWindow), _("Goal - Cross"));
			break;
		
		case PLUS :
			clear_board(app); /* clear all */
			app->game.CellStatus[3][1] = OCCUPIED;
			app->game.CellStatus[1][3] = OCCUPIED;
			app->game.CellStatus[3][2] = OCCUPIED;
			app->game.CellStatus[2][3] = OCCUPIED;
			app->game.CellStatus[3][3] = OCCUPIED;
			app->game.CellStatus[4][3] = OCCUPIED;
			app->game.CellStatus[5][3] = OCCUPIED;
			app->game.CellStatus[3][4] = OCCUPIED;
			app->game.CellStatus[3][5] = OCCUPIED;

			gtk_window_set_title(GTK_WINDOW(app->gui.MainWindow), _("Goal - Plus"));
			break;
			
		case CHIMNEY :
			clear_board(app);/* clear all */
			app->game.CellStatus[2][0] = OCCUPIED;
			app->game.CellStatus[2][1] = OCCUPIED;
			app->game.CellStatus[3][0] = OCCUPIED;
			app->game.CellStatus[3][1] = OCCUPIED;
			app->game.CellStatus[4][0] = OCCUPIED;
			app->game.CellStatus[4][1] = OCCUPIED;
			app->game.CellStatus[2][2] = OCCUPIED;
			app->game.CellStatus[2][3] = OCCUPIED;
			app->game.CellStatus[3][2] = OCCUPIED;
			app->game.CellStatus[4][3] = OCCUPIED;
			app->game.CellStatus[4][2] = OCCUPIED;
			
			gtk_window_set_title(GTK_WINDOW(app->gui.MainWindow), _("Goal - Chimney"));
			break;
			
		case PYRAMID :
			clear_board(app);/* clear all */
			app->game.CellStatus[3][1] = OCCUPIED;
			app->game.CellStatus[2][2] = OCCUPIED;
			app->game.CellStatus[3][2] = OCCUPIED;
			app->game.CellStatus[4][2] = OCCUPIED;
			app->game.CellStatus[1][3] = OCCUPIED;
			app->game.CellStatus[2][3] = OCCUPIED;
			app->game.CellStatus[3][3] = OCCUPIED;
			app->game.CellStatus[0][4] = OCCUPIED;
			app->game.CellStatus[1][4] = OCCUPIED;
			app->game.CellStatus[2][4] = OCCUPIED;
			app->game.CellStatus[3][4] = OCCUPIED;
			app->game.CellStatus[4][4] = OCCUPIED;
			app->game.CellStatus[5][4] = OCCUPIED;
			app->game.CellStatus[6][4] = OCCUPIED;
			app->game.CellStatus[4][3] = OCCUPIED;
			app->game.CellStatus[5][3] = OCCUPIED;
			
			gtk_window_set_title(GTK_WINDOW(app->gui.MainWindow), _("Goal - Pyramid"));
			break;
			
		case ARROW :
			clear_board(app);/* clear all */
			app->game.CellStatus[3][0] = OCCUPIED;
			app->game.CellStatus[2][1] = OCCUPIED;
			app->game.CellStatus[3][1] = OCCUPIED;
			app->game.CellStatus[4][1] = OCCUPIED;
			app->game.CellStatus[1][2] = OCCUPIED;
			app->game.CellStatus[2][2] = OCCUPIED;
			app->game.CellStatus[3][2] = OCCUPIED;
			app->game.CellStatus[4][2] = OCCUPIED;
			app->game.CellStatus[5][2] = OCCUPIED;
			app->game.CellStatus[3][3] = OCCUPIED;
			app->game.CellStatus[3][4] = OCCUPIED;
			app->game.CellStatus[2][5] = OCCUPIED;
			app->game.CellStatus[3][5] = OCCUPIED;
			app->game.CellStatus[4][5] = OCCUPIED;
			app->game.CellStatus[2][6] = OCCUPIED;
			app->game.CellStatus[3][6] = OCCUPIED;
			app->game.CellStatus[4][6] = OCCUPIED;
			
			gtk_window_set_title(GTK_WINDOW(app->gui.MainWindow), _("Goal - Arrow"));
			break;
			
		case RUBIN :
			clear_board(app);/* clear all */
			app->game.CellStatus[3][0] = OCCUPIED;
			app->game.CellStatus[2][1] = OCCUPIED;
			app->game.CellStatus[3][1] = OCCUPIED;
			app->game.CellStatus[4][1] = OCCUPIED;
			app->game.CellStatus[1][2] = OCCUPIED;
			app->game.CellStatus[2][2] = OCCUPIED;
			app->game.CellStatus[3][2] = OCCUPIED;
			app->game.CellStatus[4][2] = OCCUPIED;
			app->game.CellStatus[5][2] = OCCUPIED;
			app->game.CellStatus[2][3] = OCCUPIED;
			app->game.CellStatus[3][3] = OCCUPIED;
			app->game.CellStatus[4][3] = OCCUPIED;
			app->game.CellStatus[1][4] = OCCUPIED;
			app->game.CellStatus[2][4] = OCCUPIED;
			app->game.CellStatus[3][4] = OCCUPIED;
			app->game.CellStatus[4][4] = OCCUPIED;
			app->game.CellStatus[5][4] = OCCUPIED;
			app->game.CellStatus[2][5] = OCCUPIED;
			app->game.CellStatus[3][5] = OCCUPIED;
			app->game.CellStatus[4][5] = OCCUPIED;
			app->game.CellStatus[3][6] = OCCUPIED;

			gtk_window_set_title(GTK_WINDOW(app->gui.MainWindow), _("Goal - Rubin"));
			break;
			
		case DIAMOND :
			clear_board(app);/* clear all */
			app->game.CellStatus[3][0] = OCCUPIED;
			app->game.CellStatus[2][1] = OCCUPIED;
			app->game.CellStatus[3][1] = OCCUPIED;
			app->game.CellStatus[4][1] = OCCUPIED;
			app->game.CellStatus[1][2] = OCCUPIED;
			app->game.CellStatus[2][2] = OCCUPIED;
			app->game.CellStatus[3][2] = OCCUPIED;
			app->game.CellStatus[4][2] = OCCUPIED;
			app->game.CellStatus[5][2] = OCCUPIED;
			app->game.CellStatus[0][3] = OCCUPIED;
			app->game.CellStatus[1][3] = OCCUPIED;
			app->game.CellStatus[2][3] = OCCUPIED;
			app->game.CellStatus[3][3] = OCCUPIED;
			app->game.CellStatus[4][3] = OCCUPIED;
			app->game.CellStatus[5][3] = OCCUPIED;
			app->game.CellStatus[6][3] = OCCUPIED;
			app->game.CellStatus[1][4] = OCCUPIED;
			app->game.CellStatus[2][4] = OCCUPIED;
			app->game.CellStatus[3][4] = OCCUPIED;
			app->game.CellStatus[4][4] = OCCUPIED;
			app->game.CellStatus[5][4] = OCCUPIED;
			app->game.CellStatus[2][5] = OCCUPIED;
			app->game.CellStatus[3][5] = OCCUPIED;
			app->game.CellStatus[4][5] = OCCUPIED;
			app->game.CellStatus[3][6] = OCCUPIED;

			gtk_window_set_title(GTK_WINDOW(app->gui.MainWindow), _("Goal - Diamond"));
			break;
			
		case SOLITAIRE :
			for (x=2; x<=4; x++)
				for(y=0; y<=1; y++)
					app->game.CellStatus[x][y] = OCCUPIED;
			for (x=0; x<=6; x++)
				for(y=2; y<=4; y++)
					app->game.CellStatus[x][y] = OCCUPIED;
			for (x=2; x<=4; x++)
				for(y=5; y<=6; y++)
					app->game.CellStatus[x][y] = OCCUPIED;
			
			gtk_window_set_title(GTK_WINDOW(app->gui.MainWindow), _("Goal - Solitaire"));
			break;

		default:
			g_error(":: PACKAGE: %s :: FILE: %s :: LINE: %i :: unkown game type\n" , PACKAGE, __FILE__, __LINE__);

	}

	/* show pieces */
	for(x = 0; x < NUMBER_CELLS; x++)
		for(y = 0; y < NUMBER_CELLS; y++)
			switch(app->game.CellStatus[x][y])
			{
				case UNKOWN :
					/* with this value we mark not used fields */
				       break;	
				case EMPTY :
					gnome_canvas_item_hide(app->gui.PieceNormal[x][y]);
					break;
				case OCCUPIED :
					gnome_canvas_item_show(app->gui.PieceNormal[x][y]);
					break;
				default:
					g_error(":: PACKAGE: %s :: FILE: %s :: LINE: %i :: wrong status type (x=%i :: y=%i)\n" , PACKAGE, __FILE__, __LINE__, x, y);
			
			}

	/* hide the "helper" pieces */
	gnome_canvas_item_hide(app->gui.PieceEmpty);
	gnome_canvas_item_hide(app->gui.PieceMarked);
	gnome_canvas_item_hide(app->gui.PieceTouched);
	gnome_canvas_item_hide(app->gui.PieceNegativ);
	gnome_canvas_item_hide(app->gui.PieceEmptyPositiv);
	gnome_canvas_item_hide(app->gui.PieceEmptyNegativ);

	/* set important variables */
	app->game.JumpStartPosX = 0;
	app->game.JumpStartPosY = 0;
	app->game.MovePosX = 0;
	app->game.MovePosY = 0;

}


/**
 * valid_move:
 * @app:
 * @from_x:
 * @from_y:
 * @to_x:
 * @to_y:
 *
 * function description:
 *
 * return values:
 */
gboolean 
valid_move(GoalApp *app, gint from_x, gint from_y, gint to_x, gint to_y)
{
	
	gint diff;
    

   /* preconditions */
    if((/**/app->game.CellStatus[from_x][from_y] != UNKOWN) &&
       (/**/ app->game.CellStatus[to_x][to_y] != UNKOWN) &&
       (/**/app->game.CellStatus[to_x][to_y] == EMPTY) &&
       (/**/app->game.CellStatus[from_x][from_y] == OCCUPIED) &&
       ((from_x == to_x) || (from_y == to_y)))
    {
	if(from_x == to_x)
	{/* here check horizontal move */
	    diff = from_y - to_y;
	    if((diff == 2) || (diff == -2))
	    {
		if(diff == -2) 
			diff = from_y + 1;
		else 
			diff= from_y - 1;
		if(app->game.CellStatus[from_x][diff] == OCCUPIED) 
			return TRUE;
		else 
			return FALSE;
	    }
	    else 
		    return FALSE;
	}
	else
	{/* here check vertical move */
	    diff = from_x - to_x;
	    if((diff == 2) || (diff == -2))
	    {
		if(diff == -2) 
			diff = from_x + 1;
		else 
			diff= from_x - 1;
		if(app->game.CellStatus[diff][from_y] == OCCUPIED) 
			return TRUE;
		else 
			return FALSE;
	    }
	    else 
		    return FALSE;
	}
    }
    else
	return FALSE;
}




/**
 * one_move_possible:
 * @app:
 *
 * function description:
 *
 * return values: TRUE if one move is possible, otherwise FALSE
 */
gboolean
one_move_possible(GoalApp *app)
{
	gint x, y;
	
	for(x = 0; x < NUMBER_CELLS; x++)
	{
		for(y = 0; y < NUMBER_CELLS; y++)
		{
			if(valid_move(app, x,y,x+2,y)) return TRUE;
			if(valid_move(app, x,y,x-2,y)) return TRUE;
			if(valid_move(app, x,y,x,y+2)) return TRUE;
			if(valid_move(app, x,y,x,y-2)) return TRUE;
		}
	}
	
	return FALSE;
}



/**
 * remove_piece:
 * @app:
 * @x:
 * @y:
 *
 * function description:
 *
 * return values:
 */
void
remove_piece(GoalApp *app, gint x, gint y)
{
	app->game.CellStatus[x][y] = EMPTY;
	gnome_canvas_item_hide(app->gui.PieceNormal[x][y]);
}



/**
 * make_move:
 * @app:
 * @from_x:
 * @from_y:
 * @to_x:
 * @to_y:
 *
 * function description:
 *
 * return values:
 */
void 
make_move(GoalApp *app, gint from_x, gint from_y, gint to_x, gint to_y){
    gint diff;