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From: henry@delftcc.UUCP
Newsgroups: comp.lang.c
Subject: Query: Implementation with non-zero NULL
Message-ID: <158@delftcc.UUCP>
Date: Wed, 27-May-87 19:58:45 EDT
Article-I.D.: delftcc.158
Posted: Wed May 27 19:58:45 1987
Date-Received: Sat, 30-May-87 06:21:32 EDT
Organization: Delft Consulting Corp., New York
Lines: 14
Keywords: C, NULL, portability

I'm writing a book on C portability.  Interested to find actual
implementation of C where the null pointer is not "all bits zero."

In such an implementation, does
	char *p; p = (char *)0;
result in p having the special null value?  How is NULL defined?

Are static pointers initialized to all bits zero or to the null value
(as in ANSI spec)?

In such an implementation, can you use the conventional abbreviation
	if (p)
to mean
	if (p != NULL)