dab/board.cc

   1 /*      $NetBSD: board.cc,v 1.4 2008/04/28 20:22:53 martin Exp $        */
   2
   3 /*-
   4  * Copyright (c) 2003 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Christos Zoulas.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * board.C: Board manipulations
  34  */
  35 #include "defs.h"
  36 RCSID("$NetBSD: board.cc,v 1.4 2008/04/28 20:22:53 martin Exp $")
  37
  38 #include <stdio.h>
  39 #include <string.h>
  40 #include <stdarg.h>
  41 #include "board.h"
  42 #include "gamescreen.h"
  43 #include "box.h"
  44 #include "player.h"
  45
  46 BOARD::BOARD(size_t y, size_t x, GAMESCREEN* scrn) :
  47     _ny(y),
  48     _nx(x),
  49     _scrn(scrn)
  50 {
  51     _ty = 2 * _ny + 1;
  52     _tx = 2 * _nx + 1;
  53
  54     _b = new int*[_ty];
  55
  56     for (y = 0; y < _ty; y++)
  57         _b[y] = new int[_tx];
  58
  59     init();
  60 }
  61
  62 BOARD::BOARD(const BOARD& b) :
  63     _ty(b._ty),
  64     _tx(b._tx),
  65     _ny(b._ny),
  66     _nx(b._nx),
  67     _scrn(NULL)
  68 {
  69     _b = new int*[_ty];
  70
  71     for (size_t y = 0; y < _ty; y++) {
  72         _b[y] = new int[_tx];
  73         static_cast<void>(memcpy(_b[y], b._b[y], _tx * sizeof(int)));
  74     }
  75 }
  76
  77 BOARD::~BOARD()
  78 {
  79     size_t y;
  80
  81     for (y = 0; y < _ty; y++)
  82         delete[] _b[y];
  83
  84     delete[] _b;
  85 }
  86
  87 // Clear all boxes and reset state for a new game
  88 void BOARD::init(void)
  89 {
  90     size_t x, y;
  91
  92     for (y = 0; y < _ny; y++)
  93         for (x = 0; x < _nx; x++) {
  94             BOX box(y, x, *this);
  95             box.reset();
  96         }
  97 }
  98
  99 /*
 100  * Make a move for player with initial 'c', adding an edge at box(x, y)
 101  * and the specified direction.
 102  * returns:
 103  *      -1:     Invalid move
 104  *       n:     Number of closures n E [0..2]
 105  */
 106 int BOARD::domove(size_t y, size_t x, int dir, char c)
 107 {
 108     int closed = 0;
 109
 110     // Check if out of bounds
 111     if (!bounds(y, x))
 112         return -1;
 113
 114     BOX box1(y, x, *this);
 115
 116     // Check if the edge is already there
 117     if (box1.isset(dir))
 118         return -1;
 119
 120     box1.set(dir);
 121
 122     if (box1.count() == 4) {
 123         // New box; name it and count it
 124         box1.name() = c;
 125         closed++;
 126     }
 127
 128     box1.paint();
 129
 130     // Check other box
 131     x += BOX::edges[dir].x;
 132     y += BOX::edges[dir].y;
 133
 134     if (bounds(y, x)) {
 135         BOX box2(y, x, *this);
 136         if (box2.count() == 4) {
 137             box2.name() = c;
 138             box2.paint();
 139             closed++;
 140         }
 141     }
 142     return closed;
 143 }
 144
 145 // Return true if the board is full
 146 int BOARD::full(void) const
 147 {
 148     for (size_t y = 0; y < _ny; y++)
 149         for (size_t x = 0; x < _nx; x++) {
 150             BOX box(y, x, const_cast<BOARD&>(*this));
 151             if (box.count() != 4)
 152                 return 0;
 153         }
 154     return 1;
 155 }
 156
 157 // Return if the coordinates are within bounds; we don't check for < 0,
 158 // since size_t is unsigned
 159 int BOARD::bounds(size_t y, size_t x) const
 160 {
 161     return x < _nx && y < _ny;
 162 }
 163
 164 // Paint all boxes, effectively redrawing the board
 165 void BOARD::paint(void) const
 166 {
 167     for (size_t y = 0; y < _ny; y++)
 168         for (size_t x = 0; x < _nx; x++) {
 169             BOX box(y, x, const_cast<BOARD&>(*this));
 170             box.paint();
 171         }
 172 }
 173
 174 // Clear the screen
 175 void BOARD::clean(void) const
 176 {
 177     if (!_scrn)
 178         return;
 179     _scrn->clean();
 180 }
 181
 182 // Move cursor to x, y
 183 void BOARD::setpos(size_t y, size_t x) const
 184 {
 185     if (!_scrn)
 186         return;
 187     _scrn->moveto(y, x);
 188     _scrn->redraw();
 189 }
 190
 191 // Return character indicating move
 192 int BOARD::getmove(void) const
 193 {
 194     if (!_scrn)
 195         return 'q';
 196     _scrn->redraw();
 197     return _scrn->getinput();
 198 }
 199
 200 // Ring the bell
 201 void BOARD::bell(void) const
 202 {
 203     if (!_scrn)
 204         return;
 205     _scrn->bell();
 206 }
 207
 208 // Post the score in the current game for player i
 209 void BOARD::score(size_t i, const PLAYER& p)
 210 {
 211     if (_scrn == NULL)
 212         return;
 213     _scrn->score(i, p);
 214 }
 215
 216 // Post the number of games won for player i
 217 void BOARD::games(size_t i, const PLAYER& p)
 218 {
 219     if (_scrn == NULL)
 220         return;
 221     _scrn->games(i, p);
 222 }
 223
 224 // Post the total score for player i
 225 void BOARD::total(size_t i, const PLAYER& p)
 226 {
 227     if (_scrn == NULL)
 228         return;
 229     _scrn->total(i, p);
 230 }
 231
 232 // Post the total score for player i
 233 void BOARD::ties(const PLAYER& p)
 234 {
 235     if (_scrn == NULL)
 236         return;
 237     _scrn->ties(p);
 238 }
 239
 240 // Internal algorithm error; post and abort
 241 void BOARD::abort(const char* s, ...) const
 242 {
 243     for (size_t i = 0; i < _ny; i++)
 244         fprintf(stderr, "\n");
 245
 246     va_list ap;
 247     fprintf(stderr, "Algorithm internal error: ");
 248     va_start(ap, s);
 249     vfprintf(stderr, s, ap);
 250     va_end(ap);
 251     fprintf(stderr, "\n");
 252     ::abort();
 253 }