mirror of
https://github.com/RetroShare/RetroShare.git
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424 lines
11 KiB
C++
424 lines
11 KiB
C++
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/***************************************************************************
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* Copyright (C) 2002-2003 Andi Peredri *
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* andi@ukr.net *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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***************************************************************************/
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// aw?1 - due to english rules a man reaching the king-row becomes a king
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// and the is complete.
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//
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// English Checkers
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#include "echeckers.h"
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///////////////////////////////////////////////////
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//
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// Player Functions
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//
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///////////////////////////////////////////////////
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bool ECheckers::go1(int from, int field)
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{
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from=internal(from);
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field=internal(field);
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to=field;
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if(checkCapture1()) {
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bool capture=false;
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switch(board[from]) {
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case MAN1:
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if(manCapture1(from, UL, capture)) return true;
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if(manCapture1(from, UR, capture)) return true;
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return false;
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case KING1:
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if(kingCapture1(from, UL, capture)) return true;
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if(kingCapture1(from, UR, capture)) return true;
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if(kingCapture1(from, DL, capture)) return true;
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if(kingCapture1(from, DR, capture)) return true;
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return false;
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}
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} else {
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switch(board[from]) {
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case MAN1:
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if((to==(from-6))||(to==(from-5))) {
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board[from]=FREE;
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if(to<10)
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board[to]=KING1;
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else
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board[to]=MAN1;
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return true;
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}
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return false;
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case KING1:
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if((to==(from-6))||(to==(from-5)) ||
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(to==(from+5))||(to==(from+6)) ) {
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board[from]=FREE;
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board[to]=KING1;
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return true;
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}
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return false;
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}
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}
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return false;
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}
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bool ECheckers::checkCapture1() const
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{
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for(int i=6;i<48;i++)
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if(checkCapture1(i))
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return true;
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return false;
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}
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bool ECheckers::checkCapture1(int i) const
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{
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switch(board[i]) {
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case MAN1:
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// forward-left
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if(board[i-6]==MAN2 || board[i-6]==KING2)
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if(board[i-12]==FREE) return true;
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// forward-right
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if(board[i-5]==MAN2 || board[i-5]==KING2)
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if(board[i-10]==FREE) return true;
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break;
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case KING1:
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// forward-left
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if(board[i-6]==MAN2 || board[i-6]==KING2)
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if(board[i-12]==FREE) return true;
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// forward-right
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if(board[i-5]==MAN2 || board[i-5]==KING2)
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if(board[i-10]==FREE) return true;
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// backward-left
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if(board[i+5]==MAN2 || board[i+5]==KING2)
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if(board[i+10]==FREE) return true;
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// backward-right
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if(board[i+6]==MAN2 || board[i+6]==KING2)
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if(board[i+12]==FREE) return true;
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}
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return false;
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}
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/* ORIG FUNC aw???
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bool ECheckers::checkCapture1()
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{
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for(int i=6;i<48;i++) {
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switch(board[i]) {
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case MAN1:
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// forward-left
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if(board[i-6]==MAN2 || board[i-6]==KING2)
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if(board[i-12]==FREE) return true;
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// forward-right
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if(board[i-5]==MAN2 || board[i-5]==KING2)
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if(board[i-10]==FREE) return true;
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break;
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case KING1:
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// forward-left
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if(board[i-6]==MAN2 || board[i-6]==KING2)
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if(board[i-12]==FREE) return true;
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// forward-right
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if(board[i-5]==MAN2 || board[i-5]==KING2)
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if(board[i-10]==FREE) return true;
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// backward-left
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if(board[i+5]==MAN2 || board[i+5]==KING2)
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if(board[i+10]==FREE) return true;
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// backward-right
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if(board[i+6]==MAN2 || board[i+6]==KING2)
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if(board[i+12]==FREE) return true;
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}
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}
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return false;
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}
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*/
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// Return TRUE if a course of the player true
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// Return FALSE if a course of the player incorrect
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bool ECheckers::manCapture1(int from, int direction, bool& capture)
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{
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int i=from+direction;
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if(board[i]==MAN2 || board[i]==KING2) {
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int k=i+direction;
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if(board[k]==FREE) {
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bool next=false;
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int save=board[i];
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board[from]=FREE;
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board[i]=NONE;
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// become a king!
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if(k<10) {
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board[k]=KING1;
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/*aw?1
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if(kingCapture1(k, direction+11, next)) {
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board[i]=FREE;
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return true;
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}
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*/
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} else {
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board[k]=MAN1;
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if(manCapture1(k,UL,next)) {board[i]=FREE; return true;}
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if(manCapture1(k,UR,next)) {board[i]=FREE; return true;}
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}
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//?? make move here, too???
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if((!next) && k==to) {board[i]=FREE; return true;}// move success
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// move failed, restore
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board[k]=FREE;
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board[i]=save;
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board[from]=MAN1;
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capture=true;
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}
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}
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return false;
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}
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bool ECheckers::kingCapture1(int from, int direction, bool& capture)
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{
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int i=from+direction;
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if(board[i]==MAN2 || board[i]==KING2)
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{
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int k=i+direction;
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if(board[k]==FREE)
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{
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bool next=false;
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int save=board[i];
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board[from]=FREE;
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board[i]=NONE;
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board[k]=KING1;
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if(direction==UL || direction==DR) {
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if(kingCapture1(k,UR,next)) {board[i]=FREE;return true;}
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if(kingCapture1(k,DL,next)) {board[i]=FREE;return true;}
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} else {
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if(kingCapture1(k,UL,next)) {board[i]=FREE;return true;}
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if(kingCapture1(k,DR,next)) {board[i]=FREE;return true;}
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}
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if(kingCapture1(k,direction,next)) {board[i]=FREE;return true;}
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if((!next) && k==to) {board[i]=FREE;return true;}// move ok
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// move failed, restore
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board[k]=FREE;
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board[i]=save;
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board[from]=KING1;
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capture=true;
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}
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}
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return false;
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}
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////////////////////////////////////////////////////
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//
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// Computer Functions
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//
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////////////////////////////////////////////////////
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void ECheckers::kingMove2(int from, int& resMax)
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{
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board[from]=FREE;
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int i=from-6;
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if(board[i]==FREE) {
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board[i]=KING2;
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turn(resMax);
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board[i]=FREE;
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}
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i=from-5;
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if(board[i]==FREE) {
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board[i]=KING2;
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turn(resMax);
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board[i]=FREE;
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}
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i=from+5;
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if(board[i]==FREE) {
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board[i]=KING2;
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turn(resMax);
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board[i]=FREE;
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}
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i=from+6;
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if(board[i]==FREE) {
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board[i]=KING2;
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turn(resMax);
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board[i]=FREE;
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}
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board[from]=KING2;
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}
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bool ECheckers::checkCapture2() const
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{
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for(int i=6;i<48;i++)
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{
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switch(board[i])
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{
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case MAN2:
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if(board[i+5]==MAN1 || board[i+5]==KING1)
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if(board[i+10]==FREE) return true;
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if(board[i+6]==MAN1 || board[i+6]==KING1)
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if(board[i+12]==FREE) return true;
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break;
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case KING2:
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if(board[i-6]==MAN1 || board[i-6]==KING1)
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if(board[i-12]==FREE) return true;
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if(board[i-5]==MAN1 || board[i-5]==KING1)
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if(board[i-10]==FREE) return true;
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if(board[i+5]==MAN1 || board[i+5]==KING1)
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if(board[i+10]==FREE) return true;
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if(board[i+6]==MAN1 || board[i+6]==KING1)
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if(board[i+12]==FREE) return true;
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}
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}
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return false;
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}
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// Return TRUE if it is possible to capture
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// Return FALSE if it is impossible to capture
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bool ECheckers::manCapture2(int from, int& resMax)
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{
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bool capture=false;
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// try left-down
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int i=from+5;
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if(board[i]==MAN1 || board[i]==KING1) {
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int k=from+10;
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if(board[k]==FREE) {
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int save=board[i];
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board[from]=FREE;
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board[i]=NONE;
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resMax--;
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// become a king!
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if(from>32) {
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board[k]=KING2;
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// aw?1
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turn(resMax, true); //aw???
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//aw??if(!kingCapture2(k, UL, resMax)) turn(resMax, true);
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} else {
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board[k]=MAN2;
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if(!manCapture2(k, resMax)) turn(resMax, true);
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}
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// restore
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resMax++;
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board[k]=FREE;
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board[i]=save;
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board[from]=MAN2;
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capture=true;
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}
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}
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// now right-down
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i=from+6;
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if(board[i]==MAN1 || board[i]==KING1) {
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int k=from+12;
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if(board[k]==FREE) {
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int save=board[i];
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board[from]=FREE;
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board[i]=NONE;
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resMax--;
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// become a king!
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if(from>32) {
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board[k]=KING2;
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// aw?1
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turn(resMax, true); // aw???
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//aw???if(!kingCapture2(k,UR,resMax)) turn(resMax,true);
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} else {
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board[k]=MAN2;
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if(!manCapture2(k,resMax)) turn(resMax,true);
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}
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// restore
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resMax++;
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board[k]=FREE;
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board[i]=save;
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board[from]=MAN2;
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capture=true;
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}
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}
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if(capture) return true;
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return false;
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}
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bool ECheckers::kingCapture2(int from, int direction, int &resMax)
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{
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int i=from+direction;
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if(board[i]==MAN1 || board[i]==KING1)
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{
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int k=i+direction;
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if(board[k]==FREE)
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{
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bool capture=false;
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int save=board[i];
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board[from]=FREE;
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board[i]=NONE;
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resMax--;
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|
||
|
|
board[k]=KING2;
|
||
|
|
if(direction==UL || direction==DR) {
|
||
|
|
if(kingCapture2(k,UR,resMax)) capture=true;
|
||
|
|
if(kingCapture2(k,DL,resMax)) capture=true;
|
||
|
|
} else {
|
||
|
|
if(kingCapture2(k,UL,resMax)) capture=true;
|
||
|
|
if(kingCapture2(k,DR,resMax)) capture=true;
|
||
|
|
}
|
||
|
|
if(kingCapture2(k,direction,resMax)) capture=true;
|
||
|
|
|
||
|
|
if(!capture) turn(resMax,true);
|
||
|
|
board[k]=FREE;
|
||
|
|
|
||
|
|
//restore
|
||
|
|
resMax++;
|
||
|
|
board[i]=save;
|
||
|
|
board[from]=KING2;
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
|