Class ApfloatHelper

java.lang.Object

org.apfloat.ApfloatHelper

class ApfloatHelper
extends Object

Various utility methods related to apfloats.

Version:

1.14.0

Constructor Summary

Constructors

Modifier	Constructor	Description
private	ApfloatHelper()

Method Summary

Modifier and Type	Method	Description
static Apcomplex	checkPow(Apcomplex z, Apcomplex w, long targetPrecision)
static Apfloat	checkPow(Apfloat x, Apfloat y, long targetPrecision)
private static Apcomplex	checkPowBasic(Apcomplex z, Apcomplex w, long targetPrecision)
private static void	checkPowPrecision(long targetPrecision)
static void	checkPrecision(long precision)
static void	checkRadix(int radix)
static ApfloatImpl	createApfloat(double value)
static ApfloatImpl	createApfloat(double value, long precision)
static ApfloatImpl	createApfloat(double value, long precision, int radix)
static ApfloatImpl	createApfloat(float value)
static ApfloatImpl	createApfloat(float value, long precision)
static ApfloatImpl	createApfloat(float value, long precision, int radix)
static ApfloatImpl	createApfloat(long value)
static ApfloatImpl	createApfloat(long value, long precision)
static ApfloatImpl	createApfloat(long value, long precision, int radix)
static ApfloatImpl	createApfloat(PushbackReader in, boolean isInteger)
static ApfloatImpl	createApfloat(PushbackReader in, long precision, boolean isInteger)
static ApfloatImpl	createApfloat(PushbackReader in, long precision, int radix, boolean isInteger)
static ApfloatImpl	createApfloat(String value, boolean isInteger)
static ApfloatImpl	createApfloat(String value, long precision, boolean isInteger)
static ApfloatImpl	createApfloat(String value, long precision, int radix, boolean isInteger)
static ApfloatImpl	createApfloat(BigDecimal value)
static ApfloatImpl	createApfloat(BigDecimal value, long precision)
static ApfloatImpl	createApfloat(BigInteger value)
static ApfloatImpl	createApfloat(BigInteger value, long precision)
static ApfloatImpl	createApfloat(BigInteger value, long precision, int radix)
static Apcomplex	ensureGammaPrecision(Apcomplex z, long precision)
static Apcomplex	ensurePrecision(Apcomplex z, long precision)
static Apfloat	ensurePrecision(Apfloat x, long precision)
static long	extendPrecision(long precision)
static long	extendPrecision(long precision, long extraPrecision)
static Apcomplex	extendPrecision(Apcomplex z)
static Apcomplex	extendPrecision(Apcomplex z, long extraPrecision)
static Apfloat	extendPrecision(Apfloat x)
static Apfloat	extendPrecision(Apfloat x, long extraPrecision)
static void	extractWhitespace(PushbackReader in)	Extracts whitespace from stream.
private static ApfloatBuilder	getApfloatBuilder()
private static int	getDefaultRadix()
static int	getDoublePrecision(int radix)
static int	getFloatPrecision(int radix)
static int	getLongPrecision(int radix)
static long[]	getMatchingPrecisions(Apfloat x, Apfloat y)	Get working precisions for the arguments of e.g.
static long[]	getMatchingPrecisions(Apfloat a, Apfloat b, Apfloat c, Apfloat d)	Get working precisions for the arguments of an multiply-add operation a * b + c * d.
static long	getSmallExtraPrecision(int radix)
private static ApfloatImpl	implCreateApfloat(double value, long precision, int radix)
private static ApfloatImpl	implCreateApfloat(long value, long precision, int radix)
private static ApfloatImpl	implCreateApfloat(PushbackReader in, long precision, int radix, boolean isInteger)
private static ApfloatImpl	implCreateApfloat(String value, long precision, int radix, boolean isInteger)
static Apcomplex	limitPrecision(Apcomplex z, long precision)
static Apfloat	limitPrecision(Apfloat x, long precision)
static long	longValueExact(Apint x)
static boolean	readMatch(PushbackReader in, int c)	Extracts matching character from stream.
static long	reducePrecision(long precision)
static long	reducePrecision(long precision, long extraPrecision)
static Apcomplex	reducePrecision(Apcomplex z)
static Apcomplex	reducePrecision(Apcomplex z, long extraPrecision)
static Apfloat	reducePrecision(Apfloat x)
static Apfloat	reducePrecision(Apfloat x, long extraPrecision)
static Apcomplex	setPrecision(Apcomplex z, long precision)
static long	size(Aprational x)
static BigInteger	toBigInteger(Apint x)
static PushbackReader	toPushbackReader(BigInteger x)

Methods inherited from class Object

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

Constructor Details

ApfloatHelper

private ApfloatHelper()

Method Details

createApfloat

public static ApfloatImpl createApfloat(String value,
 boolean isInteger)
                                 throws NumberFormatException,
ApfloatRuntimeException

Throws:

NumberFormatException

ApfloatRuntimeException

createApfloat

public static ApfloatImpl createApfloat(String value,
 long precision,
 boolean isInteger)
                                 throws NumberFormatException,
IllegalArgumentException,
ApfloatRuntimeException

Throws:

NumberFormatException

IllegalArgumentException

ApfloatRuntimeException

createApfloat

public static ApfloatImpl createApfloat(String value,
 long precision,
 int radix,
 boolean isInteger)
                                 throws NumberFormatException,
IllegalArgumentException,
ApfloatRuntimeException

Throws:

NumberFormatException

IllegalArgumentException

ApfloatRuntimeException

implCreateApfloat

private static ApfloatImpl implCreateApfloat(String value,
 long precision,
 int radix,
 boolean isInteger)
                                      throws NumberFormatException,
ApfloatRuntimeException

Throws:

NumberFormatException

ApfloatRuntimeException

createApfloat

public static ApfloatImpl createApfloat(long value)
                                 throws NumberFormatException,
ApfloatRuntimeException

Throws:

NumberFormatException

ApfloatRuntimeException

createApfloat

public static ApfloatImpl createApfloat(long value,
 long precision)
                                 throws NumberFormatException,
IllegalArgumentException,
ApfloatRuntimeException

Throws:

NumberFormatException

IllegalArgumentException

ApfloatRuntimeException

createApfloat

public static ApfloatImpl createApfloat(long value,
 long precision,
 int radix)
                                 throws NumberFormatException,
IllegalArgumentException,
ApfloatRuntimeException

Throws:

NumberFormatException

IllegalArgumentException

ApfloatRuntimeException

implCreateApfloat

private static ApfloatImpl implCreateApfloat(long value,
 long precision,
 int radix)
                                      throws NumberFormatException,
ApfloatRuntimeException

Throws:

NumberFormatException

ApfloatRuntimeException

createApfloat

public static ApfloatImpl createApfloat(float value)
                                 throws NumberFormatException,
ApfloatRuntimeException

Throws:

NumberFormatException

ApfloatRuntimeException

createApfloat

public static ApfloatImpl createApfloat(float value,
 long precision)
                                 throws NumberFormatException,
IllegalArgumentException,
ApfloatRuntimeException

Throws:

NumberFormatException

IllegalArgumentException

ApfloatRuntimeException

createApfloat

public static ApfloatImpl createApfloat(float value,
 long precision,
 int radix)
                                 throws NumberFormatException,
IllegalArgumentException,
ApfloatRuntimeException

Throws:

NumberFormatException

IllegalArgumentException

ApfloatRuntimeException

createApfloat

public static ApfloatImpl createApfloat(double value)
                                 throws NumberFormatException,
ApfloatRuntimeException

Throws:

NumberFormatException

ApfloatRuntimeException

createApfloat

public static ApfloatImpl createApfloat(double value,
 long precision)
                                 throws NumberFormatException,
IllegalArgumentException,
ApfloatRuntimeException

Throws:

NumberFormatException

IllegalArgumentException

ApfloatRuntimeException

createApfloat

public static ApfloatImpl createApfloat(double value,
 long precision,
 int radix)
                                 throws NumberFormatException,
IllegalArgumentException,
ApfloatRuntimeException

Throws:

NumberFormatException

IllegalArgumentException

ApfloatRuntimeException

implCreateApfloat

private static ApfloatImpl implCreateApfloat(double value,
 long precision,
 int radix)
                                      throws NumberFormatException,
ApfloatRuntimeException

Throws:

NumberFormatException

ApfloatRuntimeException

createApfloat

public static ApfloatImpl createApfloat(PushbackReader in,
 boolean isInteger)
                                 throws IOException,
NumberFormatException,
ApfloatRuntimeException

Throws:

IOException

NumberFormatException

ApfloatRuntimeException

createApfloat

public static ApfloatImpl createApfloat(PushbackReader in,
 long precision,
 boolean isInteger)
                                 throws IOException,
NumberFormatException,
IllegalArgumentException,
ApfloatRuntimeException

Throws:

IOException

NumberFormatException

IllegalArgumentException

ApfloatRuntimeException

createApfloat

public static ApfloatImpl createApfloat(PushbackReader in,
 long precision,
 int radix,
 boolean isInteger)
                                 throws IOException,
NumberFormatException,
IllegalArgumentException,
ApfloatRuntimeException

Throws:

IOException

NumberFormatException

IllegalArgumentException

ApfloatRuntimeException

implCreateApfloat

private static ApfloatImpl implCreateApfloat(PushbackReader in,
 long precision,
 int radix,
 boolean isInteger)
                                      throws IOException,
NumberFormatException,
ApfloatRuntimeException

Throws:

IOException

NumberFormatException

ApfloatRuntimeException

createApfloat

public static ApfloatImpl createApfloat(BigInteger value)
                                 throws NumberFormatException,
ApfloatRuntimeException

Throws:

NumberFormatException

ApfloatRuntimeException

createApfloat

public static ApfloatImpl createApfloat(BigInteger value,
 long precision)
                                 throws NumberFormatException,
IllegalArgumentException,
ApfloatRuntimeException

Throws:

NumberFormatException

IllegalArgumentException

ApfloatRuntimeException

createApfloat

public static ApfloatImpl createApfloat(BigInteger value,
 long precision,
 int radix)
                                 throws NumberFormatException,
IllegalArgumentException,
ApfloatRuntimeException

Throws:

NumberFormatException

IllegalArgumentException

ApfloatRuntimeException

createApfloat

public static ApfloatImpl createApfloat(BigDecimal value)
                                 throws ApfloatRuntimeException

Throws:

ApfloatRuntimeException

createApfloat

public static ApfloatImpl createApfloat(BigDecimal value,
 long precision)
                                 throws IllegalArgumentException,
ApfloatRuntimeException

Throws:

IllegalArgumentException

ApfloatRuntimeException

readMatch

public static boolean readMatch(PushbackReader in,
 int c)
                         throws IOException

Extracts matching character from stream. A non-matching character is pushed back to the stream.

Parameters:

in - The input.

c - The character to expect from the stream.

Returns:

true if the specified character was extracted from the stream, false otherwise.

Throws:

IOException - In case of read error in the stream.

extractWhitespace

public static void extractWhitespace(PushbackReader in)
                              throws IOException

Extracts whitespace from stream.

Parameters:

in - The input.

Throws:

IOException - In case of read error in the stream.

getMatchingPrecisions

public static long[] getMatchingPrecisions(Apfloat x,
 Apfloat y)
                                    throws ApfloatRuntimeException

Get working precisions for the arguments of e.g. an add, subtract or compare operation.

Note that the returned precision can be zero to indicate that the number is insignificant in the calculation. This is the case if either operand is zero, or if one number lies completely outside the significant range of the other number. Consider e.g. the case

x.scale() = 100
x.precision() = 50
y.scale() = 10
y.precision() = 5

In e.g. the sum of x and y, the operand y would now be insignificant.

Parameters:

x - First argument.

y - Second argument.

Returns:

Array of two longs containing the working precisions for x and y, correspondingly.

Throws:

ApfloatRuntimeException

getMatchingPrecisions

public static long[] getMatchingPrecisions(Apfloat a,
 Apfloat b,
 Apfloat c,
 Apfloat d)
                                    throws ApfloatRuntimeException

Get working precisions for the arguments of an multiply-add operation a * b + c * d. Works as well for a multiply-subtract operation, of course.

The returned array contains three longs:

[0] Working precisions for a and b
[1] Working precisions for c and d
[2] Maximum precision of the final result a * b + c * d

Note that the precisions can be zero. See getMatchingPrecisions(Apfloat,Apfloat) for details.

Parameters:

a - First argument.

b - Second argument.

c - Third argument.

d - Fourth argument.

Returns:

Array of three longs containing the precisions.

Throws:

ApfloatRuntimeException

checkPrecision

public static void checkPrecision(long precision)
                           throws IllegalArgumentException

Throws:

IllegalArgumentException

checkRadix

public static void checkRadix(int radix)
                       throws NumberFormatException

Throws:

NumberFormatException

checkPowPrecision

private static void checkPowPrecision(long targetPrecision)
                               throws InfiniteExpansionException

Throws:

InfiniteExpansionException

checkPowBasic

private static Apcomplex checkPowBasic(Apcomplex z,
 Apcomplex w,
 long targetPrecision)
                                throws ArithmeticException,
ApfloatRuntimeException

Throws:

ArithmeticException

ApfloatRuntimeException

checkPow

public static Apcomplex checkPow(Apcomplex z,
 Apcomplex w,
 long targetPrecision)
                          throws ArithmeticException,
ApfloatRuntimeException

Throws:

ArithmeticException

ApfloatRuntimeException

checkPow

public static Apfloat checkPow(Apfloat x,
 Apfloat y,
 long targetPrecision)
                        throws ArithmeticException,
ApfloatRuntimeException

Throws:

ArithmeticException

ApfloatRuntimeException

getFloatPrecision

public static int getFloatPrecision(int radix)

getDoublePrecision

public static int getDoublePrecision(int radix)

getLongPrecision

public static int getLongPrecision(int radix)

getSmallExtraPrecision

public static long getSmallExtraPrecision(int radix)

limitPrecision

public static Apfloat limitPrecision(Apfloat x,
 long precision)
                              throws ApfloatRuntimeException

Throws:

ApfloatRuntimeException

ensurePrecision

public static Apfloat ensurePrecision(Apfloat x,
 long precision)
                               throws ApfloatRuntimeException

Throws:

ApfloatRuntimeException

extendPrecision

public static long extendPrecision(long precision,
 long extraPrecision)

extendPrecision

public static long extendPrecision(long precision)

reducePrecision

public static long reducePrecision(long precision,
 long extraPrecision)
                            throws ApfloatRuntimeException

Throws:

ApfloatRuntimeException

reducePrecision

public static long reducePrecision(long precision)
                            throws ApfloatRuntimeException

Throws:

ApfloatRuntimeException

extendPrecision

public static Apfloat extendPrecision(Apfloat x)
                               throws ApfloatRuntimeException

Throws:

ApfloatRuntimeException

extendPrecision

public static Apfloat extendPrecision(Apfloat x,
 long extraPrecision)
                               throws ApfloatRuntimeException

Throws:

ApfloatRuntimeException

reducePrecision

public static Apfloat reducePrecision(Apfloat x)
                               throws ApfloatRuntimeException

Throws:

ApfloatRuntimeException

reducePrecision

public static Apfloat reducePrecision(Apfloat x,
 long extraPrecision)
                               throws ApfloatRuntimeException

Throws:

ApfloatRuntimeException

setPrecision

public static Apcomplex setPrecision(Apcomplex z,
 long precision)
                              throws ApfloatRuntimeException

Throws:

ApfloatRuntimeException

limitPrecision

public static Apcomplex limitPrecision(Apcomplex z,
 long precision)
                                throws ApfloatRuntimeException

Throws:

ApfloatRuntimeException

ensurePrecision

public static Apcomplex ensurePrecision(Apcomplex z,
 long precision)
                                 throws ApfloatRuntimeException

Throws:

ApfloatRuntimeException

extendPrecision

public static Apcomplex extendPrecision(Apcomplex z)
                                 throws ApfloatRuntimeException

Throws:

ApfloatRuntimeException

extendPrecision

public static Apcomplex extendPrecision(Apcomplex z,
 long extraPrecision)
                                 throws ApfloatRuntimeException

Throws:

ApfloatRuntimeException

reducePrecision

public static Apcomplex reducePrecision(Apcomplex z)
                                 throws ApfloatRuntimeException

Throws:

ApfloatRuntimeException

reducePrecision

public static Apcomplex reducePrecision(Apcomplex z,
 long extraPrecision)
                                 throws ApfloatRuntimeException

Throws:

ApfloatRuntimeException

ensureGammaPrecision

public static Apcomplex ensureGammaPrecision(Apcomplex z,
 long precision)

size

public static long size(Aprational x)
                 throws ApfloatRuntimeException

Throws:

ApfloatRuntimeException

toBigInteger

public static BigInteger toBigInteger(Apint x)

toPushbackReader

public static PushbackReader toPushbackReader(BigInteger x)
                                       throws IOException

Throws:

IOException

longValueExact

public static long longValueExact(Apint x)
                           throws OverflowException

Throws:

OverflowException

getDefaultRadix

private static int getDefaultRadix()
                            throws NumberFormatException

Throws:

NumberFormatException

getApfloatBuilder

private static ApfloatBuilder getApfloatBuilder()