com.ibm.eou.decimal
Class DecimalConstants

java.lang.Object
  |
  +--com.ibm.eou.decimal.DecimalConstants

public final class DecimalConstants

extends java.lang.Object

This class provides static types and constants used by library methods on DecimalEncoder and DecimalDecoder for encoding and decoding binary representations of decimal floating-point numbers using the decimal32, decimal64 and decimal128 formats.

Author:

Dave Clark, IBM Ease of Use

Nested Class Summary

static class	DecimalConstants.DecimalEncoding This class represents an encoding specification.
static class	DecimalConstants.RoundingMode This class represents a rounding mode.

Field Summary

static int	BIT_COMBINATION Constant specifying the bit position at which the combination field is stored in DecimalNNN formats.
static int	BIT_EXPONENT Constant specifying the bit position at which the exponent continuation field is stored in DecimalNNN formats.
static int	BIT_SIGN Constant specifying the bit position at which the sign is stored in DecimalNNN formats.
static DecimalConstants.DecimalEncoding	DECIMAL128 Constant specifying decimal128 encoding.
static DecimalConstants.DecimalEncoding	DECIMAL32 Constant specifying decimal32 encoding.
static DecimalConstants.DecimalEncoding	DECIMAL64 Constant specifying decimal64 encoding.
static DecimalConstants.RoundingMode	ROUNDING_CEILING Constant specifying a rounding mode in which non-integer finite numbers are rounded to the nearest integer in the positive direction.
static DecimalConstants.RoundingMode	ROUNDING_DOWN Constant specifying a rounding mode in which non-integer finite numbers are rounded to the nearest integer in the direction towards zero.
static DecimalConstants.RoundingMode	ROUNDING_FLOOR Constant specifying a rounding mode in which non-integer finite numbers are rounded to the nearest integer in the negative direction.
static DecimalConstants.RoundingMode	ROUNDING_HALF_DOWN Constant specifying a rounding mode in which non-integer finite numbers are rounded to the nearest integer in either direction, and exact halves are rounded to the nearest integer in the direction towards zero.
static DecimalConstants.RoundingMode	ROUNDING_HALF_EVEN Constant specifying a rounding mode in which non-integer finite numbers are rounded to the nearest integer in either direction, and exact halves are rounded in whichever direction will make the previous digit even.
static DecimalConstants.RoundingMode	ROUNDING_HALF_UP Constant specifying a rounding mode in which non-integer finite numbers are rounded to the nearest integer in either direction, and exact halves are rounded to the nearest integer in the direction away from zero.
static DecimalConstants.RoundingMode	ROUNDING_UP Constant specifying a rounding mode in which non-integer finite numbers are rounded to the nearest integer in the direction away from zero.

Constructor Summary

protected

DecimalConstants()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DECIMAL32

public static final DecimalConstants.DecimalEncoding DECIMAL32

Constant specifying decimal32 encoding. This encoding uses 32 bits, and accommodates 7 decimal digits of coefficient. It uses 6 bits for the exponent continuation, taking exponents in the range -101 to 90.

DECIMAL64

public static final DecimalConstants.DecimalEncoding DECIMAL64

Constant specifying decimal64 encoding. This encoding uses 64 bits, and accommodates 16 decimal digits of coefficient. It uses 8 bits for the exponent continuation, taking exponents in the range -398 to 369.

DECIMAL128

public static final DecimalConstants.DecimalEncoding DECIMAL128

Constant specifying decimal128 encoding. This encoding uses 128 bits, and accommodates 34 decimal digits of coefficient. It uses 12 bits for the exponent continuation, taking exponents in the range -6176 to 6111.

ROUNDING_FLOOR

public static final DecimalConstants.RoundingMode ROUNDING_FLOOR

Constant specifying a rounding mode in which non-integer finite numbers are rounded to the nearest integer in the negative direction.

ROUNDING_CEILING

public static final DecimalConstants.RoundingMode ROUNDING_CEILING

Constant specifying a rounding mode in which non-integer finite numbers are rounded to the nearest integer in the positive direction.

ROUNDING_DOWN

public static final DecimalConstants.RoundingMode ROUNDING_DOWN

Constant specifying a rounding mode in which non-integer finite numbers are rounded to the nearest integer in the direction towards zero.

ROUNDING_UP

public static final DecimalConstants.RoundingMode ROUNDING_UP

Constant specifying a rounding mode in which non-integer finite numbers are rounded to the nearest integer in the direction away from zero.

ROUNDING_HALF_DOWN

public static final DecimalConstants.RoundingMode ROUNDING_HALF_DOWN

Constant specifying a rounding mode in which non-integer finite numbers are rounded to the nearest integer in either direction, and exact halves are rounded to the nearest integer in the direction towards zero.

ROUNDING_HALF_UP

public static final DecimalConstants.RoundingMode ROUNDING_HALF_UP

Constant specifying a rounding mode in which non-integer finite numbers are rounded to the nearest integer in either direction, and exact halves are rounded to the nearest integer in the direction away from zero.

ROUNDING_HALF_EVEN

public static final DecimalConstants.RoundingMode ROUNDING_HALF_EVEN

Constant specifying a rounding mode in which non-integer finite numbers are rounded to the nearest integer in either direction, and exact halves are rounded in whichever direction will make the previous digit even.

BIT_SIGN

public static final int BIT_SIGN

Constant specifying the bit position at which the sign is stored in DecimalNNN formats.

See Also:

Constant Field Values

BIT_COMBINATION

public static final int BIT_COMBINATION

Constant specifying the bit position at which the combination field is stored in DecimalNNN formats.

See Also:

Constant Field Values

BIT_EXPONENT

public static final int BIT_EXPONENT

Constant specifying the bit position at which the exponent continuation field is stored in DecimalNNN formats.

See Also:

Constant Field Values

Constructor Detail

DecimalConstants

protected DecimalConstants()