// mdexceptions.h
//
// WinDirStat - Directory Statistics
// Copyright (C) 2003-2005 Bernhard Seifert
// Copyright (C) 2004-2016 WinDirStat team (windirstat.info)
//
// 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
//
// This general purpose header is derived from a file
// created by www.daccord.net und published
// here under GPL with friendly permission of D'accord.
//

// Note: Md is just a prefix.

#ifndef __WDS_MDEXCEPTIONS_H__
#define __WDS_MDEXCEPTIONS_H__
#pragma once

#ifndef _INC_STDARG
#include <stdarg.h>
#endif

class CMdStringException: public CException
{
public:
    CMdStringException(LPCTSTR pszText)
        : m_sText(pszText) // pszText may be an ordinal resource (MAKEINTRESOURCE)
    {
    }

    virtual BOOL GetErrorMessage(LPTSTR lpszError, UINT nMaxError, UINT *pnHelpContext = NULL)
    {
        if(pnHelpContext != NULL)
        {
            *pnHelpContext = 0;
        }
        if((nMaxError != 0) && (lpszError != NULL))
        {// TODO, fix parameters
            _tcscpy_s(lpszError, nMaxError, m_sText);
        }
        return true;
    }

protected:
    CString m_sText;
};

inline CString MdGetExceptionMessage(const CException *pe)
{
    const INT ccBufferSize = 0x400;
    CString s;
    BOOL b = pe->GetErrorMessage(s.GetBuffer(ccBufferSize), ccBufferSize);
    s.ReleaseBuffer();

    if(!b)
    {
        s = _T("(no error message available)");
    }

    return s;
}

inline CString MdGetWinErrorText(HRESULT hr)
{
    CString sRet;
    LPVOID lpMsgBuf;
    DWORD dw = FormatMessage(
        FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
        NULL,
        hr,
        MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
        (LPTSTR)&lpMsgBuf,
        0,
        NULL
        );
    if(NULL == dw)
    {
        CString s(MAKEINTRESOURCE(AFX_IDP_NO_ERROR_AVAILABLE));
        sRet.Format(_T("%s (0x%08lx)"), s, hr);
    }
    else
    {
        sRet = CString(static_cast<LPCTSTR>(lpMsgBuf));
        ::LocalFree(lpMsgBuf);
    }
    return sRet;
}

inline void MdThrowStringException(UINT resId)
{
    throw new CMdStringException(MAKEINTRESOURCE(resId));
}

inline void MdThrowStringException(LPCTSTR pszText)
{
    throw new CMdStringException(pszText);
}

inline void __MdFormatStringExceptionV(CString& rsText, LPCTSTR pszFormat, va_list vlist)
{
// CString sFormat(); // may be a MAKEINTRESOURCE
    rsText.FormatMessageV(CString(pszFormat), &vlist);
}

inline void AFX_CDECL MdThrowStringExceptionF(LPCTSTR pszFormat, ...)
{
    CString sText;

    va_list vlist;
    va_start(vlist, pszFormat);
    __MdFormatStringExceptionV(sText, pszFormat, vlist);
    va_end(vlist);

    MdThrowStringException(sText);
}

inline void MdThrowStringExceptionV(LPCTSTR pszFormat, va_list vlist)
{
    CString sText;
    __MdFormatStringExceptionV(sText, pszFormat, vlist);
    MdThrowStringException(sText);
}

inline void AFX_CDECL MdThrowStringExceptionF(UINT nResIdFormat, ...)
{
    CString sText;

    va_list vlist;
    va_start(vlist, nResIdFormat);
    __MdFormatStringExceptionV(sText, MAKEINTRESOURCE(nResIdFormat), vlist);
    va_end(vlist);

    MdThrowStringException(sText);
}

inline void MdThrowStringExceptionF(UINT nResIdFormat, va_list vlist)
{
    CString sText;
    __MdFormatStringExceptionV(sText, MAKEINTRESOURCE(nResIdFormat), vlist);
    MdThrowStringException(sText);
}

inline void MdThrowWinError(DWORD dw, LPCTSTR pszPrefix =NULL)
{
    CString sMsg = pszPrefix;
    sMsg += _T(": ") + MdGetWinErrorText(dw);
    MdThrowStringException(sMsg);
}

inline void MdThrowHresult(HRESULT hr, LPCTSTR pszPrefix =NULL)
{
    CString sMsg = pszPrefix;
    sMsg += _T(": ") + MdGetWinErrorText(hr);
    MdThrowStringException(sMsg);
}


inline void MdThrowLastWinerror(LPCTSTR pszPrefix = NULL)
{
    MdThrowWinError(::GetLastError(), pszPrefix);
}

inline void MdThrowFailed(HRESULT hr, LPCTSTR pszPrefix = NULL)
{
    if(FAILED(hr))
    {
        MdThrowHresult(hr, pszPrefix);
    }
}

#endif // __WDS_MDEXCEPTIONS_H__
