deck.cpp

   1 /*
   2 OOPoker
   3
   4 Copyright (c) 2010 Lode Vandevenne
   5 All rights reserved.
   6
   7 This file is part of OOPoker.
   8
   9 OOPoker is free software: you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation, either version 3 of the License, or
  12 (at your option) any later version.
  13
  14 OOPoker is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with OOPoker.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #include "deck.h"
  24 #include "random.h"
  25
  26 Deck::Deck()
  27 : index(0)
  28 {
  29   for(size_t i = 0; i < 52; i++) cards[i].setIndex(i);
  30 }
  31
  32 void Deck::shuffle()
  33 {
  34   index = 0;
  35
  36   Card old[52];
  37   for(size_t i = 0; i < 52; i++) old[i] = cards[i];
  38
  39   //Fisher-Yates shuffle
  40   for(size_t i = 0; i < 52; i++)
  41   {
  42     int r = (int)(getRandom() * (52 - i));
  43     cards[i] = old[r];
  44     std::swap(old[r], old[(52 - 1 - i)]);
  45
  46   }
  47 }
  48
  49 Card Deck::next()
  50 {
  51   if(index >= 52) return Card();
  52
  53   Card result = cards[index];
  54   index++;
  55   return result;
  56 }