Synopsis

(Required) Pointer arithmetic shall only be applied to pointers that address an array or array element.

Enabled by default

Yes

Severity/Certainty

Medium/High

Full description

A direct access to a field of a struct was found, that uses an offset from the address of the struct. This check is identical to PTR-arith-field.

Coding standards

Code examples

The following code example fails the check and will give a warning:

struct S{
  char c;
  int x;
};

void main(void) {
  struct S s;
  *(&s.c+1) = 10;
}

The following code example passes the check and will not give a warning about this issue:

struct S{
  char c;
  int x;
};

void example(void) {
  struct S s;
  s.x = 10;
}