C++ TParse::Drive方法代码示例

// ---------------------------------------------------------
// CCookieManagerServer::CheckDiskSpace
// ---------------------------------------------------------
//
TBool CCookieManagerServer::CheckDiskSpace( RFs& aFileSystem,
										   const TDesC& aFileName ) const
	{
	TInt err;

	TParse parse;
	err = parse.SetNoWild( aFileName, NULL, NULL );
	if ( err == KErrNone )
		{
		// This is in the form : drive-letter: (letter + semi-colon)
		TBuf<2> driveBuf( parse.Drive() );
		TCharF driveLetter( driveBuf[0] );
		TCharF driveALetter( 'A' );
		TDriveNumber driveNum = (TDriveNumber)( (TUint)(driveLetter) -
												(TUint)(driveALetter) );

		TBool noSpace = EFalse;
		TRAP( err, noSpace = SysUtil::DiskSpaceBelowCriticalLevelL
					( &aFileSystem, KCookieMaxFileLength, driveNum ) );
		if ( err == KErrNone && noSpace )
			{
			err = KErrDiskFull;
			}
		}

	return ( err == KErrNone ? ETrue : EFalse );
	}

TInt PosixFilesystem::SetDefaultDir (RFs& aFs)
{
    TParse parse;
    parse.Set(RProcess().FileName(), NULL, NULL);
#ifdef __SECURE_DATA__
    return aFs.SetSessionToPrivate(TDriveUnit(parse.Drive()));
#else
    return aFs.SetSessionPath(parse.DriveAndPath());
#endif
}

void CMainControlEngine::SetResPath()
{
	TFileName fileName;
	::CompleteWithAppPath(fileName);
	TParse parse;
	parse.Set(fileName,NULL,NULL);
	iResPath.Zero();
	iResPath.Append(parse.Drive());
	iResPath.Append(KRESOURCEPATH);
}

	void CompleteWithAppPathM(TDes &aPath)
	{
		TFileName fullAppName = RProcess().FileName();
		TParse parse;
		TParse parse1;
		parse.Set(fullAppName, NULL, NULL);
		parse1.Set(aPath, NULL, NULL);

		if(parse1.DrivePresent())
		{
			aPath[0] = parse.Drive()[0];
		}
		else
		{
			aPath.Insert(0, parse.Drive());
		}
#ifdef __WINS__
		aPath[0] = 'c';
#endif
	}

void CMainControlEngine::SetAppDrive()
{
#ifdef __WINS__
	iDrive.Append(_L("C:"));
#else
	TFileName fileName;
	::CompleteWithAppPath(fileName);
	TParse parse;
	parse.Set(fileName,NULL,NULL);
	iDrive.Zero();
	iDrive.Append(parse.Drive());
#endif
}

/*static*/ TInt CJournalFile::CheckFileNameL(RFs&, const TDesC& aFileName)
	{
	TParse parse;

	User::LeaveIfError(parse.Set(aFileName, NULL, NULL));

	if (!parse.DrivePresent())
		User::Leave(KErrArgument);
	
	if (!parse.PathPresent())
		User::Leave(KErrArgument);	
	
	TDriveUnit drive(parse.Drive());
	return drive;
	}

/**
The method parses aFileName argument and constructs the full database file name (including the path) there.
The full file name will be constructed in aFileName input/output argument.

@param aDbFileName Input/Output. Database file name will be constructed there.
@param aSysDrivePrivatePath SQL server private path on the system drive.   
@param aDrive Output parameter. The drive number.
				
@leave KErrBadName Missing file name.

@panic SqlDb 7 In _DEBUG mode - no drive in the final file path.

@internalComponent
*/
static void DoFullFileNameL(TDes& aDbFileName, const TDesC& aSysDrivePrivatePath, TDriveNumber& aDrive)
	{
	TParse parse;
	__SQLLEAVE_IF_ERROR2(parse.Set(aDbFileName, &aSysDrivePrivatePath, NULL));
	if(!parse.NamePresent())
		{
		__SQLLEAVE2(KErrBadName);	
		}
	aDbFileName.Copy(parse.FullName());
	TPtrC driveName = parse.Drive();
	__ASSERT_DEBUG(driveName.Length() > 0, __SQLPANIC2(ESqlPanicInternalError));
	TInt driveNumber = -1;
	__SQLLEAVE_IF_ERROR2(RFs::CharToDrive(driveName[0], driveNumber));
	aDrive = static_cast <TDriveNumber> (driveNumber);
	}

void PrintDiskUsage(RFs& aFs, const TDesC& aPath, TInt aOffset = 0)
	{
	_LIT(KSpace, " ");
	TheTest.Printf(_L("%*.*S%S\r\n"), aOffset, aOffset, &KSpace, &aPath);
	TFindFile findFile(aFs);
	CDir* fileNameCol = NULL;
	TBuf<8> fileNameMask;
	fileNameMask.Copy(_L("*.*"));
	TInt err = findFile.FindWildByDir(fileNameMask, aPath, fileNameCol);
	if(err == KErrNone)
		{
		do
			{
			const TDesC& file = findFile.File();//"file" variable contains the drive and the path. the file name in "file" is invalid in this case.
			(void)TheParse.Set(file, NULL, NULL);
			TPtrC driveName = TheParse.Drive();
			if(aPath.FindF(driveName) >= 0)
				{		
                TInt cnt = fileNameCol->Count();
                for(TInt i=0;i<cnt;++i)
                    {
                    const ::TEntry& entry = (*fileNameCol)[i];
                    if(!entry.IsDir())
                        {
                        TheTest.Printf(_L("%*.*S    %S, size=%d\r\n"), aOffset, aOffset, &KSpace, &entry.iName, entry.iSize);
                        }
                    else
                        {
                        TBuf<100> path;
                        path.Copy(aPath);
                        path.Append(entry.iName);
                        path.Append(_L("\\"));
                        PrintDiskUsage(aFs, path, aOffset + 4);
                        }
                    }
				} // if(aPath.FindF(driveName) >= 0)
			
			delete fileNameCol;
			fileNameCol = NULL;
			} while((err = findFile.FindWild(fileNameCol)) == KErrNone);//Get the next set of files
		}
	else
		{
		TheTest.Printf(_L("  FindWildByDir() failed with err=%d\r\n"), err);
		}
	}

// -----------------------------------------------------------------------------
// MVPbkContactFieldSelector* CContactMatcher::CreateFieldTypeSelectorLC( )
// -----------------------------------------------------------------------------
MVPbkContactFieldSelector* CContactMatcher::CreateFieldTypeSelectorLC
  ( TInt aResId )
  {
    if ( !iResourceFileInitialized )
        {
        TFileName tmpName;
        // Append the Resource Files Directory
        tmpName.Append( KDC_RESOURCE_FILES_DIR );     
        // Append the Ressource File Name
        tmpName.Append( KMsgCommonUtilsResourceFileName );
  
        // Obtain the drive where the DLL is installed
        TFileName dllDrive;
        Dll::FileName( dllDrive );
  
        // Obtain the Complete path for the Resource File
        TParse parse;
        parse.Set( dllDrive, NULL, NULL );
        parse.Set( parse.Drive(), &tmpName, NULL );
        TFileName fileName;
        fileName.Append( parse.FullName());

        iResourceFile.OpenL( *iFsSession, fileName );
        iResourceFile.ConfirmSignatureL( 0 );
        iResourceFileInitialized = ETrue;
        }

    HBufC8* dataBuffer = iResourceFile.AllocReadLC( aResId );

    TResourceReader reader;
    reader.SetBuffer( dataBuffer );

    CVPbkFieldTypeSelector* fieldTypeSelector =
        CVPbkFieldTypeSelector::NewL( reader,
                    FieldTypes() );

    CleanupStack::PopAndDestroy( dataBuffer );

    CleanupStack::PushL( fieldTypeSelector );
    return fieldTypeSelector;
    }

// -----------------------------------------------------------------------------
// WebCannedImages::GetCannedImageDirL
// Gets the folder where the canned image is located
// -----------------------------------------------------------------------------
//
HBufC* WebCannedImages::getImageDirL( )
    {
    TFileName mbmDrive;
    HBufC* mbmFile = NULL;
    TParse parse;

    // get the drive letter - MBM is on the same drive as this DLL
    Dll::FileName( mbmDrive );
    parse.Set( mbmDrive, NULL, NULL );
    mbmDrive = parse.Drive();

    // allocate memory for MBM file name
    mbmFile = HBufC::NewL( KMaxFileName );

    // assemble the MBM file name
    TPtr ptr( mbmFile->Des() );
    ptr.SetLength( 0 );
    ptr.Append( mbmDrive );
    ptr.Append( KDC_APP_BITMAP_DIR );
    return mbmFile;
    }

// -----------------------------------------------------------------------------
// CPosLmLocalDatabaseManager::DatabaseExistsL
//
// (other items were commented in a header).
// -----------------------------------------------------------------------------
//
TBool CPosLmLocalDatabaseManager::DatabaseExistsL(const TDesC& aDatabaseUri)
    {
    // validate URI
    HBufC* uri = PosLmDatabaseUtility::CreateDatabaseUriL(aDatabaseUri);
    CleanupStack::PushL(uri);

    TPtrC ptr(uri->Des());
    PosLmDatabaseUtility::RemoveProtocolFromUriL(ptr);

    TParse parse;
    User::LeaveIfError(parse.Set(ptr, NULL, NULL));
    TFileName searchUri = parse.NameAndExt();
    searchUri.UpperCase();

    TInt drive;
    User::LeaveIfError(RFs::CharToDrive(parse.Drive()[0], drive));

    RDbs dbSession;
    CleanupClosePushL(dbSession);
    User::LeaveIfError(dbSession.Connect());

    CDbDatabaseNames* names = dbSession.DatabaseNamesL(
            static_cast<TDriveNumber>(drive), KPosLmDbSecureUid);
    CleanupStack::PushL(names);

    TBool exists(EFalse);
    for (TInt i = 0; i < names->Count() && !exists; i++)
        {
        HBufC* databaseName = (*names)[i].AllocLC();
        databaseName->Des().UpperCase();
        if (searchUri == *databaseName)
            {
            exists = ETrue;
            }
        CleanupStack::PopAndDestroy(databaseName);
        }

    CleanupStack::PopAndDestroy(3, uri);  //dbSession
    return exists;
    }

/**
@SYMTestCaseID          PDS-SQL-UT-4224
@SYMTestCaseDesc        CSqlServer::GetBackUpListL() functional test
@SYMTestPriority        High
@SYMTestActions         Calls CSqlServer::GetBackUpListL() and tests the output, when the drive is read-only,
                        when there is a sub-directory which name is matching the search pattern.
@SYMTestExpectedResults Test must not fail
*/  
void GetBackupListFunctionalTest()
	{
    CSqlServer* server = NULL;
    TRAPD(err, server = CreateSqlServerL());
    TEST2(err, KErrNone);
    //Case 1: database with specified uid bellow do exist (on drive C). There will be one subdirectory matching the search pattern. 
    const TDriveNumber KTestDrvNum1 = EDriveC;
    const TUid KDbUid = {0x98765432};
	TDriveUnit testDrive(KTestDrvNum1);
	TDriveName testDriveName = testDrive.Name();
	testDriveName.LowerCase(); 
	//One test directory will be created, which name will be matching the search pattern.
	//The directory name should not be included in the list with the file names.
    TFileName testFileName;
    err = server->Fs().PrivatePath(testFileName);
    TEST2(err, KErrNone);
    testFileName.Append(KDbUid.Name());
    _LIT(KTestPath, "t_startup\\");
    testFileName.Append(KTestPath);
    testFileName.Append(_L("t_startup.db"));
    TParse parse;
    err = parse.Set(testFileName, &testDriveName, 0);
    TEST2(err, KErrNone);
    err = server->Fs().MkDirAll(parse.FullName());
    TEST(err == KErrNone || err == KErrAlreadyExists);
    //
    RArray<HBufC*> files;
    TRAP(err, server->GetBackUpListL(KDbUid, KTestDrvNum1, files));
    TEST2(err, KErrNone);
    TInt fileCnt = files.Count();
    for(TInt i=0;i<fileCnt;++i)
    	{
		TPtrC fname = files[i]->Des();
		TheTest.Printf(_L("Db: %S\r\n"), &fname);
		TEST(fname.FindF(KTestPath) < 0);
		//The name should include the full path + the drive
		err = parse.Set(fname, 0, 0);
		TEST2(err, KErrNone);
		TEST(parse.DrivePresent());
		TEST(parse.PathPresent());
		TDriveName driveName(parse.Drive());
		driveName.LowerCase(); 
		delete files[i];
		TEST(driveName == testDriveName);		
    	}
    files.Close();
    //Case 2: drive Z:. No files should be returned.
    const TDriveNumber KTestDrvNum2 = EDriveZ;
    TRAP(err, server->GetBackUpListL(KDbUid, KTestDrvNum2, files));
    TEST2(err, KErrNone);
    fileCnt = files.Count();
    TEST2(fileCnt, 0);
    //Case 3: drive A:. The drive does not exist. No files should be returned.
    const TDriveNumber KTestDrvNum3 = EDriveA;
    TRAP(err, server->GetBackUpListL(KDbUid, KTestDrvNum3, files));
	TheTest.Printf(_L("Drive %d, err=%d\r\n"), KTestDrvNum3, err);
    fileCnt = files.Count();
    TEST2(fileCnt, 0);
    //
    delete server;
	}

//.........这里部分代码省略.........
        fileInit = ETrue;
        drmContent = ETrue;
        
        iCAFParameters->iEnableUI = stream.ReadInt32L();
        }
    
    else if (initUid == KMMFileSourceUid)
        {
        TInt length;
        length = stream.ReadInt32L();
        filename = HBufC::NewMaxLC(length);
        TPtr ptr = filename->Des();
        stream.ReadL(ptr, length);
        
        length = stream.ReadInt32L();
        if (length>0)
            {
            iCAFParameters->iUniqueId = HBufC::NewMaxL(length);
            ptr.Set(iCAFParameters->iUniqueId->Des());
            stream.ReadL(ptr, length);
            }
        CleanupStack::Pop(filename);
        
        fileInit = ETrue;
        drmContent = ETrue;
        iFileHandle = EFalse; 
        iCAFParameters->iEnableUI = stream.ReadInt32L();
        }
    else
        {
        //		TODO If the UID is unknown we should reject, but  currently
        //		code also used for older calls that just supply filename.
        //		User::Leave(KErrNotSupported);
        }
    
    CleanupStack::PopAndDestroy(&stream);
    
    if (!fileInit && aInitData.Length() == sizeof(TMMFFileHandleParams))
        {
        TMMFFileHandleParams params;
        TPckgC<TMMFFileHandleParams> config(params);
        config.Set(aInitData);
        params = config();
        
        
        if (params.iUid == KFileHandleUid)
            {
            fileInit = ETrue;
            User::LeaveIfError(iHandle.Duplicate(*params.iFile));
            TInt pos = 0;
            // make sure the duplicate handle is at the start of the file - the usage of the file handle really requires this
            User::LeaveIfError(iHandle.Seek(ESeekStart, pos));
            iFileHandle = ETrue;
            filename = HBufC::NewMaxLC(KMaxFileName);
            filenamePushed = ETrue;
            TPtr ptr = filename->Des();
            User::LeaveIfError(iHandle.Name(ptr));
            }
        }
    
    if (!fileInit) // do old case as last resort
        {
        TMMFFileParams params;
        TPckgC<TMMFFileParams> config(params);
        config.Set(aInitData);
        params = config();
        
        filename = params.iPath.AllocL();
        fileInit = ETrue;
        }
    
    if (!filenamePushed)
        {
        // from now on it is assumed pushed.
        CleanupStack::PushL(filename);
        }
    
    TParse parser ;
    User::LeaveIfError(parser.Set(*filename, NULL, NULL));
    CleanupStack::PopAndDestroy(filename);
    if ( !( parser.NamePresent() ) && !( parser.ExtPresent() ) )
        User::Leave( KErrBadName ) ;
    
    iFullFileName.Copy( parser.FullName() ) ;	
    iFileName = parser.Name().AllocL() ;
    iFileExt = parser.Ext().AllocL() ;
    iFilePath = parser.Path().AllocL() ;
    iFileDrive = parser.Drive().AllocL() ;
    
    // in order to simulate old behaviour we are not passing error out
    // but will try to create Content again during PrimeL()
    if (fileInit && drmContent && aFileMode==ESourceMode)
        {
        TInt contentError;
        if (iFileHandle)
            {
            TRAP(contentError, 
                iFile = CContentFile::NewL(iHandle, UniqueId(), iCAFParameters->iEnableUI);
            );
            }

//.........这里部分代码省略.........
				myDate.HomeTime();
				
				// Format date according to current locale settings
				// Format string is universal, so that whatever the locale is,
				// date is always formatted correctly
				myDate.FormatL(myBuf, _L("%/0%1%/1%2%/2%3%/3%X"));
				
				// Show formatted text				
            	CAknInformationNote* informationNote = new ( ELeave ) CAknInformationNote;
	            informationNote->ExecuteLD( myBuf );
			}
			break;
			
		// Time
		case ELocalizationCommandTime:
			{
				// buffer for localized text
				TBuf<50> myBuf;
				
				// Object for datetime data
				TTime myTime;
				
				// Set current datetime to object
				myTime.HomeTime();

				// Format time to current locale
				// Format string is universal, so that whatever the locale is,
				// time is always formatted correctly
				myTime.FormatL(myBuf, _L("%-B%:0%J%:1%T%:2%S%:3%+B"));
				
				// Show formatted text			
            	CAknInformationNote* informationNote = new ( ELeave ) CAknInformationNote;
	            informationNote->ExecuteLD( myBuf );
			}
			break;
			
		// Text
		case ELocalizationCommandText:
			{
				// buffer for string parameters that may change order
				CDesCArrayFlat* strings = new CDesCArrayFlat( 2 );
				CleanupStack::PushL( strings );

				// Initialize parameter buffer
				
				// First parameter
				strings->AppendL( _L("Heidi") );
				
				// Second parameter
				strings->AppendL( _L("2") );
				
	            // Load a string from the resource file, and append parameters into it
				HBufC* textResource = StringLoader::LoadL( R_LOC_COMMANDTEXT_TEXT, *strings );
				CleanupStack::PushL( textResource );
	            
				// Show formatted text			
	            CAknInformationNote* informationNote = new ( ELeave ) CAknInformationNote;
	            informationNote->ExecuteLD( *textResource );
	            
	            // Cleanupstack
				CleanupStack::PopAndDestroy( textResource );
				CleanupStack::PopAndDestroy( strings );
			}
			break;
			
		// Image
		case ELocalizationCommandImage:
			{
			    // find the drive where the app has been installed
			    TParse parse;
			    parse.Set(Application()->AppFullName(),0,0);
			    	            
				// Load bitmap name from the resource file
            	HBufC* bmpFile = StringLoader::LoadLC( R_LOC_COMMANDIMAGE_BMPFILE, parse.Drive());
            	
				// bitmap pointer
				CFbsBitmap* bitmap;
				
		        // Create and Load the Bitmap
		        bitmap = new( ELeave )CFbsBitmap;
		        CleanupStack::PushL( bitmap );
		        
		        // Load the first bitmap (index 0) from multi-bitmap file
		        User::LeaveIfError(bitmap->Load( *bmpFile, 0 ));
		        
                CleanupStack::Pop( bitmap );		        
		        // Draw bitmap to screen 
		        // ownership of bitmap is transferred to view
		        iAppView->DrawImage( bitmap );

		        // Cleanupstack
            	CleanupStack::PopAndDestroy( bmpFile );
			}
			break;
		
		// Default case
        default:
            break;
        }
    }

LOCAL_C void DoTestName(const TDesC& aName,TInt anError)
//
// Check errors returned
//
	{

	TBuf<32> goodName=_L("\\GOODNAME.TXT");
	TBuf<32> badName=_L("\\< > : \" / |");
	TParse parser;
	TInt r=parser.Set(aName,NULL,NULL);
	test_Value(r, r == KErrNone || r==anError);
	goodName.Insert(0,parser.Drive());
	badName.Insert(0,parser.Drive());
	
	
	TBuf<KMaxFileName> name;	//	We need an 8-bit name to test RFs::GetLongName() in 
	name.Copy(aName);			//	both builds

	TFileName dummy;			//	To use as an argument to RFs::GetLongName() will store the 
	TBuf<12> dummyShortName;	//	To use as an argument to RFs::GetShortName()
	TUint dumVal;
	TTime dumTime;
	TBool dumAnswer;
	TEntry dumEntry;
	CDir* dumDir;
	TUidType dumUid;
	TInt dumInt=0;
	TFileName badPath=aName;
	badPath.Append(_L("\\"));

//	Test MKDIR with filename containing \000
	TBuf<32> emptyName;
	emptyName.Format(_L("\\%c\\"),0);
	emptyName.Insert(0,parser.Drive());
	r=TheFs.MkDir(emptyName);
	TestReturnValue(r, anError);
	emptyName.Format(_L("\\Big%cGreen\\"),0);
	emptyName.Insert(0,parser.Drive());
	r=TheFs.MkDir(emptyName);
	TestReturnValue(r, anError);
	r=TheFs.SetSessionPath(badPath);
	TestReturnValue(r,KErrBadName); // Do not check drives
	r=TheFs.MkDir(badPath);
	TestReturnValue(r,anError);
	r=TheFs.MkDirAll(badPath);
	TestReturnValue(r,anError);
	r=TheFs.RmDir(badPath);
	TestReturnValue(r,anError);
	r=TheFs.GetDir(aName,dumInt,dumInt,dumDir);
	TestReturnValue(r,anError);
	r=TheFs.GetDir(aName,dumInt,dumInt,dumDir,dumDir);
	TestReturnValue(r,anError);
	r=TheFs.GetDir(aName,dumUid,dumInt,dumDir);
	TestReturnValue(r,anError);
	r=TheFs.Delete(aName);
	TestReturnValue(r,anError);

	r=TheFs.Rename(aName,goodName);
	TestReturnValue(r,anError);
	r=TheFs.Rename(aName,badName);
	TestReturnValue(r,anError);
	r=TheFs.Rename(goodName,aName);
	TestReturnValue(r,anError);
	r=TheFs.Rename(badName,aName);
	TestReturnValue(r,anError);

	r=TheFs.Replace(aName,goodName);
	TestReturnValue(r,anError);
	r=TheFs.Replace(aName,badName);
	TestReturnValue(r,anError);
	r=TheFs.Replace(goodName,aName);
	TestReturnValue(r,anError);
	r=TheFs.Replace(badName,aName);
	TestReturnValue(r,anError);

	r=TheFs.Att(aName,dumVal);
	TestReturnValue(r,anError);
	r=TheFs.SetAtt(aName,dumInt,dumInt);
	TestReturnValue(r,anError);
	r=TheFs.Modified(aName,dumTime);
	TestReturnValue(r,anError);
	r=TheFs.SetModified(aName,dumTime);
	TestReturnValue(r,anError);
	r=TheFs.Entry(aName,dumEntry);
	TestReturnValue(r,anError);
	r=TheFs.SetEntry(aName,dumTime,dumInt,dumInt);
	TestReturnValue(r,anError);
	r=TheFs.IsFileOpen(aName,dumAnswer);
	TestReturnValue(r,anError);

	r=TheFs.GetShortName(aName,dummyShortName);
	TestReturnValue(r,anError);
	r=TheFs.GetLongName(name,dummy);
	TestReturnValue(r,anError);
	
	RFile f;
	r=f.Open(TheFs,aName,EFileWrite);
	TestReturnValue(r,anError);
	r=f.Create(TheFs,aName,EFileWrite);
	TestReturnValue(r,anError);
//.........这里部分代码省略.........