base/applications/games/solitaire/cardlib/cardcount.cpp

   1 //
   2 //    CardCount is a helper library for CardStacks.
   3 //
   4 //    When you initialize a CardCount object with a
   5 //  cardstack, it keeps track of the number of cards
   6 //    the stack contains.
   7 //
   8 //    e.g. CardCount count(cardstack);
   9 //
  10 //    Then you can do:
  11 //
  12 //        int num_fives = count[5]
  13 //
  14 //        count.Add(cardstack2);        - combine with another stack
  15 //
  16 //        int num_aces = count[1]        - aces low
  17 //        int num_aces = count[14]    - aces high
  18 //
  19 //        count.Clear();
  20 //
  21 #include "cardcount.h"
  22
  23 CardCount::CardCount()
  24 {
  25     Clear();
  26 }
  27
  28 CardCount::CardCount(const CardStack &cs)
  29 {
  30     Init(cs);
  31 }
  32
  33 void CardCount::Clear()
  34 {
  35     for(int i = 0; i < 13; i++)
  36         count[i] = 0;
  37 }
  38
  39 void CardCount::Add(const CardStack &cs)
  40 {
  41     for(int i = 0; i < cs.NumCards(); i++)
  42     {
  43         Card card = cs[i];
  44
  45         int val = card.LoVal();
  46         count[val - 1]++;
  47     }
  48 }
  49
  50 void CardCount::Sub(const CardStack &cs)
  51 {
  52     for(int i = 0; i < cs.NumCards(); i++)
  53     {
  54         Card card = cs[i];
  55         int val = card.LoVal();
  56
  57         if(count[val - 1] > 0)
  58             count[val - 1]--;
  59     }
  60 }
  61
  62 void CardCount::Init(const CardStack &cs)
  63 {
  64     Clear();
  65     Add(cs);
  66 }
  67
  68 int CardCount::operator [] (size_t index) const
  69 {
  70     if(index < 1) return 0;
  71     else if(index > 14)  return 0;    //if out of range
  72     else if(index == 14) index = 1;    //if a "ace-high"
  73
  74     return count[index - 1];
  75 }
  76
  77 //
  78 //    Decrement specified item by one
  79 //
  80 void CardCount::Dec(size_t index)
  81 {
  82     if(index < 1) return;
  83     else if(index > 14)  return;    //if out of range
  84     else if(index == 14) index = 1;    //if a "ace-high"
  85
  86     index -= 1;
  87
  88     if(count[index] > 0)
  89         count[index]--;
  90 }