SIZEOF

[Mike Lutz]

> OK.  Everybody take a deep breath and repeat after me:
> 
> THER IS NO ONE NULL ADDRESS CONSTANT IN C!
> 
> There is no such thing as a generic "pointer" in C.

Guy's right, of course.  For those who want null pointers of various
types, might I suggest the following macro:

/*
 * Make a Null Pointer for objects of type 't'
 */

#define NullPtr(t)	( ((t) *) 0 )

This permits code like:

	execl( "/bin/foo", "foo", "bar", NullPtr(char) ) ;

This can be quickly fixed for those who object to creating pointers to
objects of type 't' but want Null pointers for (pointer) type t.

With a bit of imagination, you can create macros to allocate & free
objects of type 't' in a type safe fashion, using malloc/calloc/free.
-- 
Mike Lutz	Rochester Institute of Technology, Rochester NY
UUCP:		{allegra,seismo}!rochester!ritcv!mjl
CSNET:		mjl%rit at csnet-relay.ARPA