Path: utzoo!attcan!uunet!lll-winken!lll-lcc!ames!haven!vrdxhq!daitc!bms-at!stuart
From: stuart@bms-at.UUCP (Stuart Gathman)
Newsgroups: comp.lang.c
Subject: Re: hardcoded constants
Summary: And get it wrong to boot . . .
Message-ID: <140@bms-at.UUCP>
Date: 22 Dec 88 02:53:46 GMT
References: <1988Dec8.173158.11839@utzoo.uucp> <846@starfish.Convergent.COM> <2636@m2-net.UUCP>
Organization: Business Management Systems, Inc., Fairfax, VA
Lines: 19

In article <2636@m2-net.UUCP>, remmers@m-net.UUCP (John H. Remmers) writes:

> The space requirement for a string concatenation is a frequently-needed
> value; it's worth having a macro to represent it:

> 	#define  Catspace(s,t)  (strlen(s) + strlen(t) + 1)

> In terms of this, the malloc() call can be written:

> 	foo = malloc(Catspace(s,t) + sizeof('/'));

> thus making it explicit that you're concatenating two strings and
> allocating one more byte for an extra character.  Readability is
> improved, and the question of naming the "2" never comes up.

Of course, this is incorrect since sizeof('/') is 2 or 4 depending on
your machine.  But the concept is good . . .
-- 
Stuart D. Gathman	<stuart@bms-at.uucp>
			<..!{vrdxhq|daitc}!bms-at!stuart>