// osspecific.cpp - Implementation of the platform-specific classes
//
// WinDirStat - Directory Statistics
// Copyright (C) 2003-2005 Bernhard Seifert
// Copyright (C) 2004-2017 WinDirStat Team (windirstat.net)
//
// 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, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//

#include "stdafx.h"
#include "osspecific.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

#ifdef UNICODE
#define TSPEC "W"
#else
#define TSPEC "A"
#endif

#define PROCNAME(name) #name
#define TPROCNAME(name) #name TSPEC

// Required to use the system image lists
// - http://www.catch22.net/tuts/sysimg
// - http://msdn.microsoft.com/en-us/library/bb776418(VS.85).aspx
BOOL FileIconInit(__in  BOOL fRestoreCache)
{
    typedef BOOL (WINAPI * TFNFileIconInit)(BOOL);
    static HMODULE hShell32 = NULL;
    static TFNFileIconInit pfnFileIconInit = 0;
    if(!hShell32)
    {
        hShell32 = ::LoadLibrary(TEXT("shell32.dll"));
    }
    if(hShell32 && !pfnFileIconInit)
    {
        pfnFileIconInit = reinterpret_cast<TFNFileIconInit>(::GetProcAddress(hShell32, ((LPCSTR)660)));
    }
    if(pfnFileIconInit)
    {
        return pfnFileIconInit(fRestoreCache);
    }
    return FALSE;
}

CString GetCurrentDesktopName()
{
    if(HDESK hDesktop = ::GetThreadDesktop(::GetCurrentThreadId()))
    {
        DWORD dwNeeded = 0;
        if(!::GetUserObjectInformation(hDesktop, UOI_NAME, NULL, 0, &dwNeeded) && dwNeeded)
        {
            CString retval;
            dwNeeded += sizeof(TCHAR);
            LPTSTR buf = retval.GetBuffer(dwNeeded);
            if(::GetUserObjectInformation(hDesktop, UOI_NAME, buf, dwNeeded, &dwNeeded))
            {
                retval.ReleaseBuffer();
                return retval;
            }
        }
    }
    return CString();
}

CString GetCurrentWinstaName()
{
    if(HWINSTA hWinsta = GetProcessWindowStation())
    {
        DWORD dwNeeded = 0;
        if(!GetUserObjectInformation(hWinsta, UOI_NAME, NULL, 0, &dwNeeded) && dwNeeded)
        {
            CString retval;
            dwNeeded += sizeof(TCHAR);
            LPTSTR buf = retval.GetBuffer(dwNeeded);
            if(GetUserObjectInformation(hWinsta, UOI_NAME, buf, dwNeeded, &dwNeeded))
            {
                retval.ReleaseBuffer();
                return retval;
            }
        }
    }
    return CString();
}