Synopsis

(Required) The validity of values passed to library functions shall be checked (min value case).

Enabled by default

Yes

Severity/Certainty

Medium/Medium

Full description

A parameter value (min) might cause a domain or range error. This check is identical to MISRAC2004-20.3_i.

Coding standards

Code examples

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

#include <math.h>
#include <limits.h>

void minint(int d1, int d2) {
  int e;
  e = abs(INT_MIN);   /* const not in range */
  e = abs(d1);     /* var not checked */
  if(d1 > INT_MIN) {
  } else {
    e = abs(d1);   /* checked but in wrong branch */
  }
  if(d1 > INT_MIN) {
    d1 = d2;
    e = abs(d1);   /* checked but updated */
  }
}

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

#include <math.h>
#include <limits.h>

void example(int d) {
  int e;
  if(d > INT_MIN) {
    e = abs(d); /* checked before use */
  }
  if(INT_MIN < d) {
    e = abs(d); /* checked before use */
  }
  if(d <= INT_MIN) {
  } else {
    e = abs(d); /* checked before use */
  }
  if(INT_MIN >= d) {
  } else {
    e = abs(d); /* checked before use */
  }
  e = abs(INT_MIN+1); /* constant not INT_MIN */
}