Moderators: misra-c, david ward
- Posts: 3
- Joined: Tue Oct 05, 2010 11:48 pm
- Company: Green Hills Software
Please consider the following case:
Code: Select all
extern void f(int32_t x);
extern void test(void);
f(&glob); /* Allowed under MISRA C 2012 R17.5? */
Could you confirm if the intent that this should be a violation of the rule since we are passing a non-array as an argument where an array is expected? I ask only because there is related wording in the C90/99 standard under additive operators that states:
For the purposes of these operators, a pointer to a nonarray object behaves the same as a
pointer to the first element of an array of length one with the type of the object as its element
Thank you for your help.
- Posts: 561
- Joined: Thu Jan 05, 2006 1:11 pm
Your example is not a violation of rule 17.5. The Amplification states that the argument
... should point into an object that has at least as many elements as the array.
As you quoted, the C standard states that "&glob" should behave as if it were a pointer to the first element of an array of length one. The expected size in "f" is one, and so the example is compliant.
Posted by and on behalf of
the MISRA C Working Group