Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!indri!nic.MR.NET!shamash!nis!quad!dts
From: dts@quad.uucp (David T. Sandberg)
Newsgroups: comp.lang.c
Subject: Re: When it is amoral... (Re: When is a cast not a cast?)
Message-ID: <127@quad.uucp>
Date: 6 May 89 16:52:56 GMT
References: <2765@buengc.BU.EDU> <563@lzaz.ATT.COM> <4093@ficc.uu.net>
Reply-To: dts@quad.uucp (David T. Sandberg)
Organization: Quadric Systems, Richfield MN
Lines: 27

In article <4093@ficc.uu.net> peter@ficc.uu.net (Peter da Silva) writes:
>In article <563@lzaz.ATT.COM>, hutch@lzaz.ATT.COM (R.HUTCHISON) writes:
>> 	midpoint_pointer = (start_pointer + end_pointer) / 2;
>
>You're right. It's a valid operation.

It is?  What about when the difference between the two is an odd
number of multibyte units?  Writing to *midpoint_pointer after
setting it up in such a fashion is going to corrupt some data
(unless, of course, you *want* to modify the last byte(s) of one
unit and the first byte(s) of the next ;')

>(what's the average of the 7 clubs and the 9 clubs?)

More to the point, what's the difference between the 7 clubs and the
8 clubs?

Perhaps you mean that it is an *allowed* operation, without regards
to the wisdom of same.  Or perhaps you guys are only talking about
char pointers (and then what happens if you run into a multibyte char
machine?).

-- 
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