From: Ken Raeburn (raeburnraeburn.org)
Date: Sun May 04 2008 - 10:05:04 CDT

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

On May 3, 2008, at 16:49, Davis Johnson wrote:
> Rule 1 includes using NULL for null pointer values and not 0. It
> also includes using %p to format pointer values. There are probably
> some other things I should add.

NULL may be defined as 0, though. In calling a variadic function like
printf, *always* cast NULL (or 0) to the correct pointer type expected
by the function; the compiler should automatically convert NULL or 0
as needed in most other contexts. In fact, for variadic functions,
you should also make sure your integral-typed arguments are of the
correct types, because passing a 64-bit long where the function
expects a 32-bit int (or vice versa) may cause a mismatch in stack
layout calculations.

Ken

_______________________________________________
axp-list mailing list
axp-listredhat.com
https://www.redhat.com/mailman/listinfo/axp-list

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]