自学教程：C++ CommandLine函数代码示例

//-----------------------------------------------------------------------------// Init, shutdown//-----------------------------------------------------------------------------bool CHLModelViewerApp::PreInit( ){	CreateInterfaceFn factory = GetFactory();	ConnectTier1Libraries( &factory, 1 );	ConVar_Register( 0 );	MathLib_Init( 2.2f, 2.2f, 0.0f, 2.0f, false, false, false, false );	// Add paths...	if ( !SetupSearchPaths( NULL, false, true ) )		return false;	// Get the adapter from the command line....	const char *pAdapterString;	int nAdapter = 0;	if (CommandLine()->CheckParm( "-adapter", &pAdapterString ))	{		nAdapter = atoi( pAdapterString );	}	int nAdapterFlags = 0;	if ( CommandLine()->CheckParm( "-ref" ) )	{		nAdapterFlags |= MATERIAL_INIT_REFERENCE_RASTERIZER;	}	g_pMaterialSystem->SetAdapter( nAdapter, nAdapterFlags );	if ( !g_pFileSystem->IsSteam() || CommandLine()->FindParm( "-OldDialogs" ) )		g_bOldFileDialogs = true;		LoadFileSystemDialogModule();	return true; }

int GetDefaultDepthFeatheringValue( void ) //Allow the command-line to go against the default soft-particle value{	static int iRetVal = -1;	if ( iRetVal == -1 )	{		#if ( DEFAULT_PARTICLE_FEATHERING_ENABLED == 1 )		{			if ( CommandLine()->CheckParm( "-softparticlesdefaultoff" ) )				iRetVal = 0;			else				iRetVal = 1;		}		#else		{			if ( CommandLine()->CheckParm( "-softparticlesdefaulton" ) )				iRetVal = 1;			else				iRetVal = 0;		}		#endif	}	return iRetVal;}

//-----------------------------------------------------------------------------// Init, shutdown//-----------------------------------------------------------------------------bool CVMTEditApp::PreInit( IAppSystemGroup *pAppSystemGroup ){		// initialize interfaces	CreateInterfaceFn appFactory = pAppSystemGroup->GetFactory(); 	if (!vgui::VGui_InitInterfacesList( "VMTEDIT", &appFactory, 1 ))		return false;	g_pMatSystemSurface = (IMatSystemSurface *)pAppSystemGroup->FindSystem(MAT_SYSTEM_SURFACE_INTERFACE_VERSION);	char *pArg;	int iWidth = 1024;	int iHeight = 768;	bool bWindowed = (CommandLine()->CheckParm( "-fullscreen" ) == NULL);	if (CommandLine()->CheckParm( "-width", &pArg ))	{		iWidth = atoi( pArg );	}	if (CommandLine()->CheckParm( "-height", &pArg ))	{		iHeight = atoi( pArg );	}	if (!CreateAppWindow( "VMTEdit", bWindowed, iWidth, iHeight ))		return false;	g_pMatSystemSurface->AttachToWindow( m_HWnd );	// NOTE: If we specifically wanted to use a particular shader DLL, we set it here...	//g_pMaterialSystem->SetShader( "shaderapidx8" );		return true; }

//-----------------------------------------------------------------------------// Returns the name of the file system DLL to use//-----------------------------------------------------------------------------FSReturnCode_t FileSystem_GetFileSystemDLLName( char *pFileSystemDLL, int nMaxLen, bool &bSteam ){	bSteam = false;	// Inside of here, we don't have a filesystem yet, so we have to assume that the filesystem_stdio or filesystem_steam	// is in this same directory with us.	char executablePath[MAX_PATH];	if ( !FileSystem_GetExecutableDir( executablePath, sizeof( executablePath ) )	)		return SetupFileSystemError( false, FS_INVALID_PARAMETERS, "FileSystem_GetExecutableDir failed." );	#if defined( _WIN32 )	Q_snprintf( pFileSystemDLL, nMaxLen, "%s%cfilesystem_stdio.dll", executablePath, CORRECT_PATH_SEPARATOR );#elif defined( POSIX )	Q_snprintf( pFileSystemDLL, nMaxLen, "%s%cfilesystem_stdio", executablePath, CORRECT_PATH_SEPARATOR );	struct stat statBuf;	if ( CommandLine()->FindParm( "-steam" ) || CommandLine()->FindParm( "-steamlocal" ) || stat( pFileSystemDLL, &statBuf ) != 0 )	{		Q_snprintf( pFileSystemDLL, nMaxLen, "%s%cfilesystem_steam.dylib", executablePath, CORRECT_PATH_SEPARATOR );		bSteam = true;	}#else	#error "define a filesystem dll name"#endif	return FS_OK;}

//-----------------------------------------------------------------------------// Returns the name of the file system DLL to use//-----------------------------------------------------------------------------FSReturnCode_t FileSystem_GetFileSystemDLLName( char *pFileSystemDLL, int nMaxLen, bool &bSteam ){	bSteam = false;	// Inside of here, we don't have a filesystem yet, so we have to assume that the filesystem_stdio or filesystem_steam	// is in this same directory with us.	char executablePath[MAX_PATH];	if ( !FileSystem_GetExecutableDir( executablePath, sizeof( executablePath ) )	)		return SetupFileSystemError( false, FS_INVALID_PARAMETERS, "FileSystem_GetExecutableDir failed." );	#if defined( _WIN32 ) && !defined( _X360 )	// If filesystem_stdio.dll is missing or -steam is specified, then load filesystem_steam.dll.	// There are two command line parameters for Steam:	//		1) -steam (runs Steam in remote filesystem mode; requires Steam backend)	//		2) -steamlocal (runs Steam in local filesystem mode (all content off HDD)	Q_snprintf( pFileSystemDLL, nMaxLen, "%s%cfilesystem_stdio.dll", executablePath, CORRECT_PATH_SEPARATOR );	if ( CommandLine()->FindParm( "-steam" ) || CommandLine()->FindParm( "-steamlocal" ) || _access( pFileSystemDLL, 0 ) != 0 )	{		Q_snprintf( pFileSystemDLL, nMaxLen, "%s%cfilesystem_steam.dll", executablePath, CORRECT_PATH_SEPARATOR );		bSteam = true;	}#elif defined( _X360 )	Q_snprintf( pFileSystemDLL, nMaxLen, "%s%cfilesystem_stdio.dll", executablePath, CORRECT_PATH_SEPARATOR );#elif defined( _LINUX )	Q_snprintf( pFileSystemDLL, nMaxLen, "%s%cfilesystem_i486.so", executablePath, CORRECT_PATH_SEPARATOR );#else	#error "define a filesystem dll name"#endif	return FS_OK;}

//-----------------------------------------------------------------------------// PreInit, PostShutdown//-----------------------------------------------------------------------------bool CInputTestApp::PreInit( ){	if ( !BaseClass::PreInit() )		return false;	if (!g_pFullFileSystem || !g_pInputSystem )		return false;	// Add paths...	if ( !SetupSearchPaths() )		return false;	const char *pArg;	int iWidth = 1024;	int iHeight = 768;	bool bWindowed = (CommandLine()->CheckParm( "-fullscreen" ) == NULL);	if (CommandLine()->CheckParm( "-width", &pArg ))	{		iWidth = atoi( pArg );	}	if (CommandLine()->CheckParm( "-height", &pArg ))	{		iHeight = atoi( pArg );	}	if (!CreateAppWindow( "InputTest", bWindowed, iWidth, iHeight ))		return false;	g_pInputSystem->AttachToWindow( m_HWnd );	return true;}

//---------------------------------------------------------------------------------// Purpose: called when the plugin is loaded, load the interface we need from the engine//---------------------------------------------------------------------------------bool CEmptyServerPlugin::Load(	CreateInterfaceFn interfaceFactory, CreateInterfaceFn gameServerFactory ){	//ConnectTier1Libraries( &interfaceFactory, 1 );	pEngine = (IVEngineServer*)interfaceFactory(INTERFACEVERSION_VENGINESERVER, NULL);	if (!pEngine){		Warning( "Unable to load IVEngineServer, aborting load/n" );		return false;	}	// assuming that the value of host_timer_spin_ms is 0 by any server configs	if ( CommandLine()->CheckParm( "+host_timer_spin_ms" ) )	{		m_bCommandPresent = 1;		m_iDefaultValue = CommandLine()->ParmValue( "+host_timer_spin_ms", 0 );		if ( m_iDefaultValue < 0 )			m_iDefaultValue = 0;		else if ( m_iDefaultValue > 15 )			m_iDefaultValue = 15;	// god knows who would do this (idiots)		CommandLine()->RemoveParm( "+host_timer_spin_ms" );	}	//pEngine->ServerCommand( "con_logfile autotimer.log/n" );	//ConVar_Register( 0 );	return true;}

//-----------------------------------------------------------------------------// Purpose: // Input  : argc - //			argv[] - // Output : int//-----------------------------------------------------------------------------int main( int argc, char* argv[] ){	SpewOutputFunc( SpewFunc );	Msg( "Valve Software - vcprojtomake.exe (%s)/n", __DATE__ );	Msg( "Modified for VS2010 Support by Killer Monkey/n" );	Msg( "<[email
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