Skip to main content

isValueNegativeInfinite

Short summary​

This method checks if a value is negative infinite (-inifinity), for details check IEEE 754

:return: TRUE: value is -infinity FALSE: value is not -infinity

  • Return type: BOOL

Parameters​

NameTypeCommentKind
valueREALvalue to checkinput

Code​

Declaration​

METHOD PROTECTED isValueNegativeInfinite : BOOL
VAR_INPUT
	(* value to check *)
	value			:REAL;	
END_VAR
VAR
	(* just to cast the value*)
	realAsDword	:POINTER TO DWORD;
END_VAR

Implementation​

realAsDword := ADR(value);
isValueNegativeInfinite := (
	THIS^.isValueInfinite(value)
	AND_THEN ((realAsDword^ AND THIS^.MASK_FOR_SIGN_BIT) = THIS^.MASK_FOR_SIGN_BIT)
);