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// A pointer should not be compared to zero
//
// Confidence: High
// Copyright: (C) Gilles Muller, Julia Lawall, EMN, INRIA, DIKU. GPLv2.
// URL: https://coccinelle.gitlabpages.inria.fr/website/rules/badzero.html
// Options:
@ disable is_zero,isnt_zero @
expression *E;
expression E1,f;
@@
E = f(...)
<...
(
- E == 0
+ !E
|
- E != 0
+ E
|
- 0 == E
+ !E
|
- 0 != E
+ E
)
...>
?E = E1
@ disable is_zero,isnt_zero @
expression *E;
@@
(
E ==
- 0
+ NULL
|
E !=
- 0
+ NULL
|
- 0
+ NULL
== E
|
- 0
+ NULL
!= E
)