C++ RBuf8::Zero方法代码示例

void CDnsUpdateOption::ToStringL(RBuf8& aBuf8) const
/**
  * Writes DNS update option data to a string suitable for sending out
  * on to the network
  *
  * @internalTechnology
  * 
  */
	{
	RBuf8 encodedDomainName;
	encodedDomainName.CleanupClosePushL();

	TDomainNameArray domainNames;
	CleanupClosePushL(domainNames);
	domainNames.AppendL(iDomainName);

	CDomainNameCodec* domainNameEncoder = new(ELeave) CDomainNameCodec();
	CleanupStack::PushL(domainNameEncoder);


	domainNameEncoder->EncodeL(domainNames, encodedDomainName);


	CleanupStack::PopAndDestroy(domainNameEncoder);
	CleanupStack::PopAndDestroy(&domainNames); // closes the RBuf8	


	aBuf8.Zero();

	aBuf8.ReAllocL( 3 + encodedDomainName.Length() );

	aBuf8.Append((TChar)(iFlags.Value()));
	aBuf8.Append((TChar)iRCode1);
	aBuf8.Append((TChar)iRCode2);
	aBuf8.Append(encodedDomainName);

	CleanupStack::PopAndDestroy(&encodedDomainName); // closes the array
	}

void CDomainNameCodec::EncodeL(TDomainNameArray& aNames, RBuf8& aBuf8)
	{
	TUint requiredLength = 0;
	TUint8 nameIdx = 0;
	
	for (nameIdx=0;nameIdx<aNames.Count();nameIdx++)
		{
		// The total length required for the labels that comprise an
		// individual domain name needs to take into the length octet
		// for the initial label and the null-termination character.
		// Hence the '+ 2' below.
		requiredLength += (aNames[nameIdx].Length() + 2);		
		
		// A further length check is performed on each domain name to
		// ensure it does not exceed the maximum length permitted according
		// to RFC 1035.
		if(aNames[nameIdx].Length() > KMaxDomainNameLength)
			{
			User::Leave(KErrArgument);
			}
		}		
	
	aBuf8.Zero();
	aBuf8.ReAllocL(requiredLength);
	
	TLex8 domainName;
	TPtrC8 currentLabel;
	
	for (nameIdx=0;nameIdx<aNames.Count();nameIdx++)
		{
		domainName.Assign(aNames[nameIdx]);		
		domainName.Mark();
		
		while (!domainName.Eos())
			{
			TChar ch;
			do
				{
				ch = domainName.Get();
				}
			while ( ch != TChar('.') && !domainName.Eos() );
			
			// if not the end of the string, unget the previous char to skip the trailing
			//  dot in our marked token
			//
			if( !domainName.Eos() )
				{
				domainName.UnGet();
				}
			
			currentLabel.Set(domainName.MarkedToken());
			
			// move past the dot again, or do nothing in particular at EOS
			//
			domainName.Get();
			
			User::LeaveIfError(currentLabel.Length() > KMaxDnsLabelLength ? 
				KErrArgument : KErrNone);
			
			aBuf8.Append(TChar(currentLabel.Length()));
			aBuf8.Append(currentLabel);
			
			domainName.Mark();
			}
		
		aBuf8.Append(TChar(0));
		}
	}

void ScrShotsGenUtils::DumpJsFileL(CScrShotsSettings* scrShotsSettings)
{
    CGetImei* getImei = CGetImei::NewL();
    CleanupStack::PushL(getImei);
    RBuf8 formatBuf;
    formatBuf.Create(256);
    formatBuf.CleanupClosePushL();
    TFileName infoFile;
    
    User::LeaveIfError(CEikonEnv::Static()->FsSession().PrivatePath(infoFile));
    infoFile.Append( KDeviceJSFile );
    TParsePtrC parse((CEikonEnv::Static()->EikAppUi()->Application())->AppFullName());
    infoFile.Insert(0, KCDriveWithColon);
    
    RFs fsConn;
    User::LeaveIfError(fsConn.Connect());
    CleanupClosePushL(fsConn);
    RFile jsFile;
    if(BaflUtils::FileExists(fsConn, infoFile)){
        BaflUtils::DeleteFile(fsConn, infoFile);
    }
    //now create the file
    User::LeaveIfError(jsFile.Create(fsConn, infoFile, EFileWrite));
    CleanupClosePushL(jsFile);
    
//    User::LeaveIfError(jsFile.Write(KFunctionBlockStart));
    RBuf8 values;
    values.Create(256);
    for(int i = 0; i < KDeviceParamsCount ; i++){
        formatBuf.Zero();
        TInt sizeOfItem = User::StringLength((TText8 *)DeviceParams [i]);
        TPtr8 item((unsigned char*)DeviceParams [i],sizeOfItem ,sizeOfItem );
        switch(i){
            //device_model
            case 0:{
                CDeviceTypeInformation* devInfo = SysUtil::GetDeviceTypeInfoL();
                CleanupStack::PushL(devInfo);
                TPtrC manufName, modelCode, modelName;
                devInfo->GetManufacturerName(manufName);
                devInfo->GetModelCode(modelCode);
                devInfo->GetModelName(modelName);
                RBuf8 manufName8, modelName8, modelCode8;
                manufName8.Create(128); modelName8.Create(128); modelCode8.Create(128);
                manufName8.CleanupClosePushL(); modelName8.CleanupClosePushL(); modelCode8.CleanupClosePushL();
                manufName8.Copy(manufName);
                modelName8.Copy(modelName);
                modelCode8.Copy(modelCode);
                values.Format(KModelNameFormatString, &manufName8, &modelName8, &modelCode8);
                CleanupStack::PopAndDestroy(4);
                break;
            }
            //firmware_version
            case 1:{
                RBuf swVersion;
                swVersion.Create(128);
                SysUtil::GetSWVersion(swVersion);
                values.Copy(swVersion);
                TInt pos = 0;
                while((pos = values.Find(_L8("\n"))) != KErrNotFound){
                    //values.Delete(pos,1);
                    values.Replace(pos,1,_L8("_"));
                }
                swVersion.Close();
                break;
            }
            
            //ram_info
            case 2:{
                TInt totalram= 0;
                HAL::Get(HALData::EMemoryRAM, totalram);
                totalram /= 1024;
                values.Num(totalram);
                break;
            }
            
            //uptime
            case 3:{
                TTimeIntervalMicroSeconds32 iTickPeriod;
                UserHal::TickPeriod(iTickPeriod);
                TUint tickCount = User::TickCount();
                TUint noOfTicksPerSecond = (1000 * 1000) / iTickPeriod.Int();
                TInt noOfSecsSinceStartUp = tickCount / noOfTicksPerSecond;//noOfMicroSecsSinceStartup / (1000 * 1000);
                values.Num(noOfSecsSinceStartUp);
                break;
            }
            
            //scrshot count
            case 4:{
                values.Num(scrShotsSettings->TotalScrShotCount());
                break;
            }
            
            //symbian version
            case 5:{
                TVersion epocver = User::Version();
                values.Copy(epocver.Name());            
                break;
            }
            
            //series 60 version
//.........这里部分代码省略.........