[previous] 1851 [next] The %1s operand is 'essentially unsigned' (%2s) but will be implicitly converted to a signed type (%3s) in this bitwise operation.
Arithmetic type - Balancing

This message is issued whenever an expression of essentially unsigned type has been used as an operand of either &, | or ^ operators, and undergoes a usual arithmetic conversion to a signed integer type (the type of the other operand).

For example: 


/*PRQA S 1-9999 ++*/
/*PRQA S 1851 --*/

int f1851 (unsigned char a, int b)
{
  b = b & a;                /* 1851 */

  return ((a - 1) | b) ;    /* 1851 */
}

MISRA C:2012 Rules applicable to message 1851:

Rule-10.4  (Required) Both operands of an operator in which the usual arithmetic conversions are performed shall have the same essential type category

QA·C Source Code Analyser 8.1
MISRA C:2012 Compliance Module 1.0
© 2012 Programming Research.
www.programmingresearch.com 		Personality Groups | Glossary | Message Index | MISRA C:2012 Rule Index Contents