Module org.jfree.svg

Package org.jfree.svg.util

Class RyuDouble

java.lang.Object

org.jfree.svg.util.RyuDouble

public final class RyuDouble
extends java.lang.Object

An implementation of Ryu for double.

Field Summary

Fields

Modifier and Type	Field	Description
private static boolean	DEBUG
private static int	DOUBLE_EXPONENT_BIAS
private static int	DOUBLE_EXPONENT_BITS
private static int	DOUBLE_EXPONENT_MASK
private static int	DOUBLE_MANTISSA_BITS
private static long	DOUBLE_MANTISSA_MASK
private static int	NEG_TABLE_SIZE
private static int	POS_TABLE_SIZE
private static java.math.BigInteger[]	POW5
private static int	POW5_BITCOUNT
private static java.math.BigInteger[]	POW5_INV
private static int	POW5_INV_BITCOUNT
private static int	POW5_INV_QUARTER_BITCOUNT
private static int[][]	POW5_INV_SPLIT
private static int	POW5_QUARTER_BITCOUNT
private static int[][]	POW5_SPLIT

Constructor Summary

Constructors

Constructor	Description
RyuDouble()

Method Summary

Modifier and Type	Method	Description
private static int	decimalLength(long v)
static java.lang.String	doubleToString(double value)
static java.lang.String	doubleToString(double value, RoundingMode roundingMode)
private static long	mulPow5divPow2(long m, int i, int j)	Compute the high digits of m * 5^p / 10^q = m * 5^(p - q) / 2^q = m * 5^i / 2^j, with q chosen such that m * 5^i / 2^j has sufficiently many decimal digits to represent the original floating point number.
private static long	mulPow5InvDivPow2(long m, int i, int j)	Compute the high digits of m / 5^i / 2^j such that the result is accurate to at least 9 decimal digits.
private static boolean	multipleOfPowerOf5(long value, int q)
private static int	pow5bits(int e)
private static int	pow5Factor(long value)

Methods inherited from class java.lang.Object

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

Field Detail

DEBUG

private static boolean DEBUG

DOUBLE_MANTISSA_BITS

private static final int DOUBLE_MANTISSA_BITS

See Also:

Constant Field Values

DOUBLE_MANTISSA_MASK

private static final long DOUBLE_MANTISSA_MASK

See Also:

Constant Field Values

DOUBLE_EXPONENT_BITS

private static final int DOUBLE_EXPONENT_BITS

See Also:

Constant Field Values

DOUBLE_EXPONENT_MASK

private static final int DOUBLE_EXPONENT_MASK

See Also:

Constant Field Values

DOUBLE_EXPONENT_BIAS

private static final int DOUBLE_EXPONENT_BIAS

See Also:

Constant Field Values

POS_TABLE_SIZE

private static final int POS_TABLE_SIZE

See Also:

Constant Field Values

NEG_TABLE_SIZE

private static final int NEG_TABLE_SIZE

See Also:

Constant Field Values

POW5

private static final java.math.BigInteger[] POW5

POW5_INV

private static final java.math.BigInteger[] POW5_INV

POW5_BITCOUNT

private static final int POW5_BITCOUNT

See Also:

Constant Field Values

POW5_QUARTER_BITCOUNT

private static final int POW5_QUARTER_BITCOUNT

See Also:

Constant Field Values

POW5_SPLIT

private static final int[][] POW5_SPLIT

POW5_INV_BITCOUNT

private static final int POW5_INV_BITCOUNT

See Also:

Constant Field Values

POW5_INV_QUARTER_BITCOUNT

private static final int POW5_INV_QUARTER_BITCOUNT

See Also:

Constant Field Values

POW5_INV_SPLIT

private static final int[][] POW5_INV_SPLIT

Constructor Detail

RyuDouble

public RyuDouble()

Method Detail

doubleToString

public static java.lang.String doubleToString(double value)

doubleToString

public static java.lang.String doubleToString(double value,
                                              RoundingMode roundingMode)

pow5bits

private static int pow5bits(int e)

decimalLength

private static int decimalLength(long v)

multipleOfPowerOf5

private static boolean multipleOfPowerOf5(long value,
                                          int q)

pow5Factor

private static int pow5Factor(long value)

mulPow5divPow2

private static long mulPow5divPow2(long m,
                                   int i,
                                   int j)

Compute the high digits of m * 5^p / 10^q = m * 5^(p - q) / 2^q = m * 5^i / 2^j, with q chosen such that m * 5^i / 2^j has sufficiently many decimal digits to represent the original floating point number.

mulPow5InvDivPow2

private static long mulPow5InvDivPow2(long m,
                                      int i,
                                      int j)

Compute the high digits of m / 5^i / 2^j such that the result is accurate to at least 9 decimal digits. i and j are already chosen appropriately.