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lib: linklist avoid access NULL->data

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Let's assert(NULL) if the datastructure is not set.
The code assumes that the pointer is always non NULL. So, let's enforce
this semantic.

Signed-off-by: Vincent Jardin <vincent.jardin@6wind.com>
This commit is contained in:
Vincent JARDIN 2017-10-09 10:51:03 +02:00
parent 40aa03ebde
commit 67533c11d2
1 changed files with 2 additions and 1 deletions
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lib/linklist.h
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@ -56,7 +56,8 @@ struct list {
#define listtail(X) ((X) ? ((X)->tail) : NULL)
#define listcount(X) ((X)->count)
#define list_isempty(X) ((X)->head == NULL && (X)->tail == NULL)
#define listgetdata(X) (assert((X)->data != NULL), (X)->data)
/* return X->data only if X and X->data are not NULL */
#define listgetdata(X) (assert(X), assert((X)->data != NULL), (X)->data)
/* Prototypes. */
extern struct list *