NewLC - String and Descriptors - Comments

Re: String and Descriptors

rizvanmotala99 — Fri, 12 Sep 2008 11:07:30 +0200

thanx
keep it up

Re: String and Descriptors

Xufun — Tue, 02 Sep 2008 04:34:03 +0200

Good doc!
I got it!

Thanks lot!

String and Descriptors

ovvenkatesan — Tue, 09 Oct 2007 07:18:23 +0200

This is article is very useful to learners like me, thanks to all

Ok ok, It's just that the

tymi — Fri, 01 Jun 2007 14:36:03 +0200

Ok ok, It's just that the image above can suggest that for someone totally fresh to descriptors.

2. TPtr and TPtrC do not

eric — Fri, 01 Jun 2007 11:21:23 +0200

2. TPtr and TPtrC do not have to necessarily point to data on the heap, do they?

No they don't ! A TPtr can point to data on the stack of course !

Memory representation

tymi — Fri, 01 Jun 2007 11:18:21 +0200

1. I agree with gogo.
5 8 ->
TPtr inherits from TDes which inherits form TDesC. iLength, iMaxLength and then iPtr

2. TPtr and TPtrC do not have to necessarily point to data on the heap, do they?

> String and Descriptors

Anonymous — Thu, 08 Mar 2007 11:05:55 +0100

_LIT(KHello,"Hello"); TBufC<10> buf(KHello);

According to the diagramatic description of TBufC whether the object'buf' contains 10 followed by "Hello" or 5 followed by "Hello"

> String and Descriptors

Tirtha — Fri, 12 Jan 2007 05:08:03 +0100

Indirectly how?? Can u plz tell me.

Conversions

eric — Thu, 11 Jan 2007 11:38:41 +0100

Not directly because you loose the "constness" of the descriptor in that case.

Conversions

Tirtha — Thu, 11 Jan 2007 11:35:09 +0100

The TBufC objects can be used to initialize TBuf provided integer template parameter should be same. Likely, can TPtr be initiazed with TPtrC?

> String and Descriptors

gogo — Thu, 15 Dec 2005 11:49:34 +0100

Maybe memory representation of TPtr in the diagram is wrong too?

> String and Descriptors

eric — Tue, 19 Jul 2005 10:33:33 +0200

You're definitely right....... Thanks to have noticed this!

> String and Descriptors

Jussi — Tue, 19 Jul 2005 10:27:24 +0200

Shouldn't "All descriptors inherits from the abstract class TDes" be "All descriptors inherits from the abstract class TDesC"?

> String and Descriptors

Ravi Kumar.Paluri — Fri, 27 Aug 2004 13:50:12 +0200

I found that this article is very good for starters. Moreover, the diagramatic representation of TPtr,TPtrC,HBufC... made my fundamentals regarding descriptors more stronger. Thanx a lot. I think the diagramatic representation of HBufC is wrong.Please verify.If so, kindly change the diagaram.

> String and Descriptors

Bino George — Thu, 12 Aug 2004 12:35:25 +0200

It seems the diagramatic representation of HBufC is wrong. The data section first octet should represent the length of the buffer.

| 5 | N | E | W | L | C |

String and Descriptors

eric — Sun, 16 Feb 2003 23:20:53 +0100

The choice of Symbian not to use common types and functions for handling strings and binary buffer may look quite surprising for many developers. This short introduction will teach you about the respective merits of Tbuf, TbufC, HbufC,...