// TortoiseSVN - a Windows shell extension for easy version control

// Copyright (C) 2008 - TortoiseSVN

// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software Foundation,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
#pragma once


/**
 * \ingroup Utils
 * This singleton class handles system information
 */
class SysInfo
{
private:
    SysInfo(void);
    ~SysInfo(void);
public:
    static const SysInfo& Instance();
    
    DWORD   GetFullVersion() const {return MAKEWORD(inf.dwMinorVersion, inf.dwMajorVersion);}
    bool    IsXP() const {return (GetFullVersion() < 0x0600);} // cover Win5.1 and 5.2 alike
    bool    IsVista() const {return (GetFullVersion() == 0x0600);}
    bool    IsVistaOrLater() const {return (GetFullVersion() >= 0x0600);}
    bool    IsWin7() const {return (GetFullVersion() == 0x0601);}
    bool    IsWin7OrLater() const {return (GetFullVersion() >= 0x0601);}
private:
    OSVERSIONINFOEX     inf;
};