RWDecimalBase Class Reference

Base class for the family of Rogue Wave decimal classes. More...

#include <rw/tools/decbase.h>

Inheritance diagram for RWDecimalBase:

Public Types
enum	Op {   assign, add, sub, mult,   div, powop, pow10op, conversion }
enum	RoundingMethod {   PLAIN, UP, DOWN, BANKERS,   TRUNCATE }
enum	State {   normal, nullstate, NaNstate, ctorError,   missingstate, SNaNstate, infinitystate }

Public Member Functions
void	swap (RWDecimalBase &rhs)

Detailed Description

The base class for the different RWDecimal classes. This class provides the definition of enums used in the derived classes and in the related classes RWDecimalInexactErr and RWDecimalOverflowErr.

Member Enumeration Documentation

enum RWDecimalBase::Op

An enumeration defining the operation that caused the error handler to be called.

See also

RWDecimalInexactErr and RWDecimalOverflowErr.

Enumerator
assign
add
sub
mult
div
powop
pow10op
conversion

enum RWDecimalBase::RoundingMethod

Rounding methods used by RWDecimalPortable::round()

The following table shows the results of the different rounding methods.

Method	1.25	1.35	1.251
PLAIN	1.2	1.3	1.2
UP	1.3	1.4	1.3
DOWN	1.2	1.3	1.2
TRUNCATE	1.2	1.3	1.2
BANKERS	1.2	1.4	1.3

Enumerator
PLAIN	Round up on a tie.
UP	Always round up.
DOWN	Always round down.
BANKERS	On a tie, round so that last digit is even.
TRUNCATE	Same as DOWN.

enum RWDecimalBase::State

An enumeration defining the state of the object.

Any operation on nullstate returns the other operand.

Any operation on NaN provides a NaN result.

Any operation on ctorError or missingstate returns a result with the State ctorError or missingstate respectively.

Operations on infinitystate are as follows:

Operation	Result
\(n \div \pm Infinity\)	0
\(\pm Infinity \times \pm Infinity\)	\(\pm Infinity\)
\(Infinity + Infinity\)	\(Infinity\)
\(Infinity - Infinity\)	NaN
\(\pm Infinity \div \pm Infinity\)	NaN
\(\pm Infinity \times 0\)	NaN

Note

An operation on an object with SNaNstate does not generate signals, unless converted to a double or long double and used in double arithmetic.

Enumerator
normal	Normal numeric value.
nullstate	Non-numeric value.
NaNstate	Quiet NaN.
ctorError	Error in construction.
missingstate	Non-numeric value.
SNaNstate	Signaling NaN.
infinitystate	Infinity.

Member Function Documentation

void RWDecimalBase::swap ( RWDecimalBase &  rhs )

inline

Swaps the data owned by self with the data owned by rhs.