C++ TDesC16::Size方法代码示例

void CTestVwAppUi::ActivateViewL(const TVwsViewId& aViewId,TUid aCustomMessageId,const TDesC16& aCustomMessage)
	{
	HBufC8* narrowMessage=HBufC8::NewLC(aCustomMessage.Size());
	TPtr8 ptr=narrowMessage->Des();
	ptr.Copy((TUint8*)aCustomMessage.Ptr(),aCustomMessage.Size());

	CCoeAppUi::ActivateViewL(aViewId,aCustomMessageId,*narrowMessage);
	CleanupStack::PopAndDestroy(); // narrowMessage.
	}

inline void CPppMsChap::NtPasswordHashL(const TDesC16& aPassword,
					TDes8& aPasswordHash)
/**
   Computes the hash of the Microsoft Windows NT password using MD4.
   @param aPassword [in] The Microsoft Windows NT password (0 to 256
   Unicode char).
   @param aPasswordHash [out] The MD4 hash of the Microsoft Windows NT
   password (16 octets).
   @note This function implements the NtPasswordHash routine specified
   in RFC 2433.
   @internalComponent
*/
	{
	ASSERT(aPassword.Length() <= KPppMsChapMaxNTPasswordLength);
	ASSERT(aPasswordHash.Length() == KPppMsChapHashSize);

// The following code does not use the Symbian Security subsystem
// components, because they do not provide a MD4 implementation yet.
// This is a provisional solution until the Symbian Security subsystem
// components will provide a MD4 implementation.

	CMd4* md4 = CMd4::NewL();
	CleanupStack::PushL(md4);


// The following code assumes that the data in TDesC16 descriptors is
// stored in little endian byte order, which is currently a
// characteristic of Symbian OS, so the reinterpret_cast is assumed to
// be safe here.
	md4->Input(TPtrC8(reinterpret_cast<const TUint8*>(
			aPassword.Ptr()),
		aPassword.Size()));
	md4->Output(aPasswordHash);

	CleanupStack::PopAndDestroy(md4);

	ASSERT(aPasswordHash.Length() == KPppMsChapHashSize);
	}

/**
Prints a string by outputting a trace packet with the Trace ID KFormatPrintfUnicode

If the specified string is too long to fit into a single trace packet
a multipart trace is generated.

@deprecated

@param aContext 	The trace packet context. @see TTraceContext
@param aDes			The string. This must not be longer than 256 characters.

@return 			The trace packet was/was not output.

@See BTrace::TMultipart
*/
EXPORT_C TBool OstPrint(const TTraceContext& aContext, const TDesC16& aDes)
	{
	if(IsTraceActive(aContext))
		{
		GET_PC(pc);
		return OST_SECONDARY_ANY(aContext.GroupId(), aContext.ComponentId(), aContext.HasThreadIdentification(), aContext.HasProgramCounter(), pc, KFormatPrintfUnicode, aDes.Ptr(), aDes.Size());
		}
	return EFalse;
	}

/**
Outputs a trace packet containing variable length data.

If the specified data is too big to fit into a single
trace record a multipart trace is generated.

@deprecated

@param aContext 	Attributes of the trace point.
@param aTraceId	    The trace point identifier as specified by @see TTraceId
@param aData		Additional data to add to trace packet.
					Must be word aligned, i.e. a multiple of 4.

@return 			The trace packet was/was not logged.

@See BTrace::TMultipart
*/
EXPORT_C TBool OstTrace(const TTraceContext& aContext, const TTraceId aTraceId, const TDesC16& aData)
	{
	if(IsTraceActive(aContext))
		{
		GET_PC(pc);
		return OST_SECONDARY_ANY(aContext.GroupId(), aContext.ComponentId(), aContext.HasThreadIdentification(), aContext.HasProgramCounter(), pc, aTraceId, aData.Ptr(), aData.Size());
		}
	return EFalse;
	}

// ---------------------------------------------------------
// RUnicodeFile::Write
// ---------------------------------------------------------
//
TInt RUnicodeFile::Write( const TDesC16& aDes )
    {
    return iFile.Write ( TPtrC8( (const TUint8*)aDes.Ptr(), aDes.Size() ) );
    }