d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Restored most of suggestion about using NULL, even though wollman

Browse Source 
disagrees with it personally :-), and fixed the misleading parts.
This commit is contained in:
bde 1996-07-17 12:32:18 +00:00
parent 8c325c27d2
commit 227052690b
1 changed files with 12 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
share/man/man9/style.9
View File

@ -13,7 +13,7 @@ files in the FreeBSD source tree.
*
* @(#)style 1.14 (Berkeley) 4/28/95
*
* $Id: style.9,v 1.7 1996/04/07 08:37:54 mpp Exp $
* $Id: style.9,v 1.8 1996/06/13 19:52:42 wollman Exp $
*
*/
@ -278,8 +278,16 @@ the declarations. Use this feature only thoughtfully.
.Ed
.Pp
Casts and sizeof's are not followed by a space.
Also, test pointers
against NULL, i.e. use:
.Pp
NULL is the preferred null pointer constant. Use NULL instead of
(type *)0 or (type *)NULL in contexts where the compiler knows the
type, e.g., in assignments. Use (type *)NULL in other contexts,
in particular for all function args. (Casting is essential for
varadic args and is necessary for other args if the function prototype
might not be in scope; since we pretend to support K&R compilers,
most prototypes might not be in scope.)
Test pointers
against NULL, e.g., use:
.Bd -literal -offset 0i
(p = f()) == NULL
.Ed
@ -309,7 +317,7 @@ or
don't roll your own!
.Bd -literal -offset 0i
if ((four = malloc(sizeof(struct foo))) == NULL)
err(1, NULL);
err(1, (char *)NULL);
if ((six = (int *)overflow()) == NULL)
errx(1, "Number overflowed.");
return (eight);