re PCSZ

[Adrian Suri]

Hi

can anyone explain the difference between the data type of PSZ and
PCSZ, from my understanding PSZ is a pointer to an array of char, and is
a pointer to a const PCSZ (without having to specify const), but is
there any more to this?

Regards

Adrian Suri

[Lars Erdmann]

Adrian Suri schrieb:

PCSZ is a constant pointer to a zero terminated string while PSZ is a
pointer to a zero terminated string.
For a C compiler, PSZ and PCSZ don't have any noticable difference (at
least, from what I see) but for a C++ compiler, it allows for more
strict type checking. If you pass a non-const pointer where PCSZ is
expected, a C++ compiler will report an error. If you want to
circumvent, you will need to explicitely cast the pointer to a PCSZ.
Remember that you can force use of C++ compiler normally by giving your
source files an extension of .cpp or by setting the corresponding
compiler switch.

Lars

[Paul Ratcliffe]

On Mon, 12 Mar 2007 22:48:26 +0100, Lars Erdmann <lars.e...@arcor.de>
wrote:

> PCSZ is a constant pointer to a zero terminated string while PSZ is a
> pointer to a zero terminated string.

I thought it was a pointer to a constant zero terminated string, which is
not the same thing i.e. you can change the pointer, but not the contents
of what it is pointing to.

[Adrian Suri]

Hi

Thanks for that, thought that might be the case but was not 100% certain

Regards

Adrian

[Lars Erdmann]

Paul Ratcliffe schrieb:

You are right, you may not assign any new content to what the pointer
points to:

PCSZ p;

p = (PCSZ)malloc(100);

*p = 'A'; /* is forbidden */
p[5] = 'A'; /* is forbidden */
*(p+10) = 'A' /* is forbidden */

Lars