Subject: Re: a few minor cleanups to src/share/misc/style
To: None <,>
From: Matthias Buelow <>
List: tech-kern
Date: 03/23/2001 01:25:27
"Greg A. Woods" <> writes:

>         * Don't use `!' for tests unless it's a boolean.

A reasonable recommendation, imho...

>         * E.g. use "if (*p == '\0')", not "if (!*p)".
>The test *is* boolean, damnit!  :-)

look at it like this for once:

basically, the first expression says:
	if dereferenced-pointer-value of p is the nul character, then ...
whereas the second expression says:
	if not dereferenced-pointer-value of p is not integer zero, then ...

maybe you might understand why some people prefer the first expression,
even though the second is "faster to type".


(I personally prefer the order "'\0'==*p", for hopefully obvious reasons)