Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!pasteur!agate!ucbvax!decwrl!decvax!ima!think!barmar
From: barmar@think.COM (Barry Margolin)
Newsgroups: comp.std.c
Subject: Re: Thoughts on moving towards ANSI
Message-ID: <36220@think.UUCP>
Date: 8 Feb 89 06:21:31 GMT
References: <795@n8emr.UUCP>
Sender: news@think.UUCP
Reply-To: barmar@kulla.think.com.UUCP (Barry Margolin)
Distribution: usa
Organization: Thinking Machines Corporation, Cambridge MA, USA
Lines: 21

In article <795@n8emr.UUCP> lwv@n8emr.UUCP (Larry W. Virden) writes:
>  As an example, he mentioned
>that in APW C and I assume MPW C, a printf format of %p was used for 'pascal'
>format strings, where the length is specified as a 2 byte (?) value before
>the string.  Thus, he wasnt going to be able to support the ANSI %p for pointer
>format.

This can be handled simply by providing two implementations of printf,
which can be selected at link time.  Another possibility would be to
require something like Unix's "-Dformat=APW_format" for programs being
ported from the old version to the new version, where the APW_format
function implements the old printf semantics.  Or you could have a
compiler option that specifies whether you want compatible or ANSI
semantics (it could predefine a bunch of such macros).


Barry Margolin
Thinking Machines Corp.

barmar@think.com
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