bool directory_exists( const string &directory )
{
#if _WIN32
    wstring directoryW( convert_to_utf16(directory) );
    struct _stat64 status;
    if( _wstat64(directoryW.c_str(), &status) == 0 )
#else // _WIN32
    struct stat status;
    if( stat(directory.c_str(), &status) == 0 )
#endif //_WIN32
    {
        if ( status.st_mode & S_IFDIR )
            return true;
    }
    return false;
}
bool file_exists( const string &filename )
{
#if _WIN32
    wstring filenameW( convert_to_utf16(filename) );
    struct _stat64 status;
    if( _wstat64(filenameW.c_str(), &status) == 0 )
#else // _WIN32
    struct stat status;
    if( stat(filename.c_str(), &status) == 0 )
#endif //_WIN32
    {
        if ( status.st_mode & S_IFREG )
            return true;
    }
    return false;
}