Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!emory!stiatl!srchtec!johnb
From: johnb@srchtec.UUCP (John Baldwin)
Newsgroups: comp.lang.c
Subject: Re: Novice MicroSoft C5.1 question
Message-ID: <165@srchtec.UUCP>
Date: 7 Aug 90 20:08:21 GMT
References: <17179@haddock.ima.isc.com> <440@demott.COM>
Organization: search technology, inc.
Lines: 28

In article <440@demott.COM> kdq@demott.COM (Kevin D. Quitt) writes:
[referring to printf() formatting in Microsoft C ver 5.10]
>   MSC's %p prints the pointer in the format SSSS:OOOO (segment/offset), with
>%Np printing only the OOOO portion.  Both forms expect a 32 bit pointer,
>so non-32 bit pointers must be coerced by using the far keyword.

A good way to make your code a little more portable (note the use of the
relative term as opposed to the absolute) is to encapsulate the pointer
type...

If you have some oft-included header file (call it <generic.h>), insert a
typedef such as
     typedef void far *     genptr;

Choose the identifier to suit yourself and your coding style... then you can
write
      printf("Address of foob is [%p] \n", (genptr)&foob);

If you move to another implementation, you only have to change the typedef.
  [Obviously, in this instance, you'll have to do more than that,
   since there's not a '%p' format specifier in the ANSI printf()!!!
   Sorry.  :-/ ]

-- 
John T. Baldwin                      |  johnb@srchtec.uucp
Search Technology, Inc.              |  johnb%srchtec.uucp@mathcs.emory.edu
standard disclaimer:                 |  ...uunet!samsung!emory!stiatl!srchtec..
opinions and mistakes purely my own. |  ...mailrus!gatech!stiatl!srchtec...