NewLC - Facing A Descriptor Issue.. plz resolve.. - Comments

Re: Facing A Descriptor Issue.. plz resolve..

someone — Thu, 27 Sep 2007 12:47:11 +0200

Thanks a lot.
It has solved the problem.

Re: Facing A Descriptor Issue.. plz resolve..

alh — Wed, 26 Sep 2007 09:42:33 +0200

You are still using calls to Ptr() in that code... Don't do that.

Your code should be able to look like this:

RFile   lFileWrite;                       
lFileWrite.Replace(lfsession,KNewFile,EFileWrite|EFileStream);

TBuf8<200> buf8;
len = CnvUtfConverter::ConvertFromUnicodeToUtf8(buf8,iContainer->Data());

lFileWrite.Write(buf8);
lFileWrite.Close();

Also, in your TDes& CMyContainer :: Data(), you should not return iTemp->Des().
Instead do a

return *iTemp;

Consider returning a TDesC& instead of a TDes& too.

Re: Facing A Descriptor Issue.. plz resolve..

someone — Wed, 26 Sep 2007 05:13:12 +0200

Thanks a lot.
But on changing the code... with rest same as given below.

void CMyView::HandleCommandL(TInt aCommand)
{
//Specific To A Case:
TInt len = iContainer->Data().Size();  
TPtr16 lPtr((TUint16*)iContainer->Data().Ptr(),len);
TBuf8<200> buf8;
TBuf16<200> buf16(lPtr);        
len = buf16.Length();   //Comes out to be 0
len = CnvUtfConverter::ConvertFromUnicodeToUtf8(buf8,buf16);

}

Would u please tell me why the length is coming as 0??
How to resolve it!!!!

Re: Facing A Descriptor Issue.. plz resolve..

alh — Tue, 25 Sep 2007 15:26:08 +0200

The problem is your calls to Ptr() that will return a raw pointer into the buffer.

When filling a descriptor from a raw pointer, it will read until it finds a NULL character.

BUT, descriptors are not NULL-terminated, so it will read on into memory until it happens to find a NULL character, and these extra reads are your garbage.

Try change your code to access the data only through the descriptors instead, (avoid the calls to Ptr()) and your problem will be solved.

Facing A Descriptor Issue.. plz resolve..

someone — Tue, 25 Sep 2007 14:36:06 +0200

I am facing an error of unwanted garbage being printed along with required in the file.
Details are given with the data entered of size = 18, Length =9.

Class CMyView
{
...
...
...
...
CMyContainer * iContainer;

};

void CMyView::HandleCommandL(TInt aCommand) { //Specific To A Case: RFile lFileWrite;

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