/* >>>------------------------------------------------------------
 * 
 * File: rule_17.2.c,  Module: M2CM-3.2-QAC-8.1.2
 * 
 * RULE 17.2 (Required):
 * Pointer subtraction shall only be applied to pointers that
 * address elements of the same array.
 * 
 * Implemented by messages:
 * 2771   Definite: These pointers address different objects.
 * 
 * 2772   Apparent: These pointers address different objects.
 * 
 * <<<------------------------------------------------------------ */

/* PRQA S 2982, 2984 ++ */

#include "misra.h"
#include "m2cmex.h"


extern S16 test_1702( void )
{
   PC arr[] = "text";
   PC *ch   = arr;
   PC *last = &arr[ 3 ];

   S32 a     = 1;
   S32 *p_a1 = &a;
   S32 *p_a2 = &a;

   struct
   {
      S32 xx;
      S32 yy;
   } b1, b2;

   S32 *p_b1;
   S32 *p_b2;
   S16 nch;

   nch = ( last - ch ) + 1;

   nch = p_a2 - p_a1;

   p_b1 = &b1.xx;
   p_b2 = &b1.yy;
   nch = p_b2 - p_b1;             /* MISRA Violation */

   p_b1 = &b1.xx;
   p_b2 = &b2.yy;
   nch = p_b2 - p_b1;             /* MISRA Violation */

   return nch;
}