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From: m5@lynx.uucp (Mike McNally)
Newsgroups: comp.sys.ibm.pc,comp.sys.intel
Subject: Re: correct code for pointer subtraction
Keywords: C pointer math has machine dependent limitations
Message-ID: <5178@lynx.UUCP>
Date: 9 Jan 89 20:26:43 GMT
References: <597@mks.UUCP> <3845@pt.cs.cmu.edu> <18123@santra.UUCP> <6604@killer.DALLAS.TX.US> <9878@drutx.ATT.COM>
Reply-To: m5@lynx.UUCP (Mike McNally)
Organization: Lynx Real-Time Systems Inc, Campbell CA
Lines: 17

In article <9878@drutx.ATT.COM> mayer@drutx.ATT.COM (gary mayer) writes:
>I grant that this is probably not the answer you would like, but it
>is the answer you should expect once pointer arithmetic is understood.

Pointer subtraction is understood.  According to the C definition, the
statement should work.  If it does not, then the compiler is busted.
I don't give a crap why it doesn't work, or what sort of architectural
problem the compiler writer had to deal with.  If a translator for a 
language exists on a machine, it should translate programs into a form
that executes correctly on the target machine, or at least inform the
operator that a problem exists.  That's the whole point of a high level
language.
-- 
Mike McNally                                    Lynx Real-Time Systems
uucp: {voder,athsys}!lynx!m5                    phone: 408 370 2233

            Where equal mind and contest equal, go.