windows_exception.cpp

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/**
    \file
    \brief Contains WindowsException methods.
*/




#include "windows_exception.h"
#include "helpers.h"

#include <comdef.h>    // _com_error

#include <sstream>




/*==============================================================================
    WindowsException methods
==============================================================================*/


WindowsException::WindowsException( char const* const file, unsigned int const line, std::string const& what, HRESULT const hResult ) {

    _com_error error( hResult );

#ifdef _UNICODE
    wchar_t const* const message16 = error.ErrorMessage();
    char message[ 256 ];
    WideCharToMultiByte( CP_UTF8, 0, message16, -1, message, ARRAYLENGTH( message ), NULL, NULL );
#else    // _UNICODE
    char const* const message = error.ErrorMessage();
#endif    // _UNICODE

    std::stringstream stream;
    stream << file << " - line " << line << std::endl << '\t' << CollapseWhitespace( what ) << std::endl << '\t' << CollapseWhitespace( message );
    m_what = stream.str();
}


WindowsException::~WindowsException() throw() {
}


const char* WindowsException::what() const throw() {

    return m_what.c_str();
}