demos/forty/scorefil.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        scorefil.cpp
   3 // Purpose:     Forty Thieves patience game
   4 // Author:      Chris Breeze
   5 // Modified by:
   6 // Created:     21/07/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1993-1998 Chris Breeze
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx/wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16 #pragma hdrstop
  17 #endif
  18
  19 #ifndef WX_PRECOMP
  20 #include "wx/wx.h"
  21 #endif
  22
  23 #ifdef __WXGTK__
  24 #include <unistd.h>
  25 #include <sys/stat.h>
  26 #include <fcntl.h>
  27 #endif
  28 #include "wx/textfile.h"
  29 #include "wx/config.h"
  30 #include "wx/fileconf.h"
  31
  32 #include "scorefil.h"
  33
  34 ScoreFile::ScoreFile(const wxString& appName)
  35 {
  36     m_config = new wxConfig(appName, _T("wxWidgets"), appName, wxEmptyString,
  37                                 wxCONFIG_USE_LOCAL_FILE);  // only local
  38 }
  39
  40 ScoreFile::~ScoreFile()
  41 {
  42     delete m_config;
  43 }
  44
  45
  46 void ScoreFile::GetPlayerList( wxArrayString &list )
  47 {
  48     m_config->SetPath(_T("/Players"));
  49     int length = m_config->GetNumberOfGroups();
  50
  51     if (length <= 0) return;
  52
  53     wxString player;
  54     long index;
  55     if (m_config->GetFirstGroup(player, index))
  56     {
  57          list.Add( player );
  58         while (m_config->GetNextGroup(player, index))
  59         {
  60               list.Add( player );
  61         }
  62     }
  63 }
  64
  65
  66 // Calculate an encrypted check number to prevent tampering with
  67 // score file
  68 long ScoreFile::CalcCheck(const wxString& name, int p1, int p2, int p3)
  69 {
  70     long check = 0;
  71     size_t i, max = name.length();
  72
  73     for(i = 0; i < max; ++i )
  74     {
  75         check = (check << 1) ^ (long)name[i];
  76         check = ((check >> 23) ^ check) & 0xFFFFFF;
  77     }
  78     check = (check << 1) ^ (long)p1;
  79     check = ((check >> 23) ^ check) & 0xFFFFFF;
  80     check = (check << 1) ^ (long)p2;
  81     check = ((check >> 23) ^ check) & 0xFFFFFF;
  82     check = (check << 1) ^ (long)p3;
  83     check = ((check >> 23) ^ check) & 0xFFFFFF;
  84     return check;
  85 }
  86
  87 wxString ScoreFile::GetPreviousPlayer() const
  88 {
  89     wxString result;
  90     m_config->SetPath(_T("/General"));
  91     m_config->Read(_T("LastPlayer"), &result);
  92     return result;
  93 }
  94
  95 void ScoreFile::ReadPlayersScore(
  96                         const wxString& player,
  97                         int& wins,
  98                         int& games,
  99                         int& score)
 100 {
 101     long check = 0;
 102     long myWins = 0, myGames = 0, myScore = 0;
 103
 104     games = wins = score = 0;
 105
 106     m_config->SetPath(_T("/Players"));
 107     m_config->SetPath(player);
 108     if (m_config->Read(_T("Score"), &myScore, 0L) &&
 109         m_config->Read(_T("Games"), &myGames, 0L) &&
 110         m_config->Read(_T("Wins"),  &myWins, 0L) &&
 111         m_config->Read(_T("Check"), &check, 0L))
 112     {
 113         if (check != CalcCheck(player, myGames, myWins, myScore))
 114         {
 115             wxMessageBox(_T("Score file corrupted"), _T("Warning"),
 116                                      wxOK | wxICON_EXCLAMATION);
 117         }
 118         else
 119         {
 120             games = myGames;
 121             wins = myWins;
 122             score = myScore;
 123         }
 124     }
 125     WritePlayersScore(player, wins, games, score);
 126 }
 127
 128
 129 void ScoreFile::WritePlayersScore(const wxString& player, int wins, int games, int score)
 130 {
 131     if (!player.empty())
 132     {
 133         m_config->SetPath(_T("/General"));
 134         m_config->Write(_T("LastPlayer"), wxString(player)); // Without wxString tmp, thinks it's bool in VC++
 135
 136         m_config->SetPath(_T("/Players"));
 137         m_config->SetPath(player);
 138         m_config->Write(_T("Score"), (long)score);
 139         m_config->Write(_T("Games"), (long)games);
 140         m_config->Write(_T("Wins"), (long)wins);
 141         m_config->Write(_T("Check"), CalcCheck(player, games, wins, score));
 142     }
 143 }