Module ch.randelshofer.fastdoubleparser

Package ch.randelshofer.fastdoubleparser

Class AbstractBigDecimalParser

java.lang.Object

ch.randelshofer.fastdoubleparser.AbstractNumberParser

ch.randelshofer.fastdoubleparser.AbstractBigDecimalParser

Direct Known Subclasses:

JavaBigDecimalFromByteArray, JavaBigDecimalFromCharArray, JavaBigDecimalFromCharSequence

abstract class AbstractBigDecimalParser
extends AbstractNumberParser

Field Summary

Fields

Modifier and Type	Field	Description
static final int	MANY_DIGITS_THRESHOLD	Threshold on the number of input characters for selecting the algorithm optimised for few digits in the significand vs.
protected static final int	MAX_DIGITS_WITHOUT_LEADING_ZEROS	See JavaBigDecimalParser.
protected static final long	MAX_EXPONENT_NUMBER
(package private) static final int	RECURSION_THRESHOLD	Threshold on the number of digits for selecting the recursive algorithm instead of the iterative algorithm.

Fields inherited from class ch.randelshofer.fastdoubleparser.AbstractNumberParser

CHAR_TO_HEX_MAP, DECIMAL_POINT_CLASS, ILLEGAL_OFFSET_OR_ILLEGAL_LENGTH, OTHER_CLASS, SYNTAX_ERROR, SYNTAX_ERROR_BITS, VALUE_EXCEEDS_LIMITS

Constructor Summary

Constructors

Constructor	Description
AbstractBigDecimalParser()

Method Summary

Modifier and Type	Method	Description
protected static void	checkParsedBigDecimalBounds(boolean illegal, int index, int endIndex, int digitCount, long exponent)
protected static boolean	hasManyDigits(int length)

Methods inherited from class ch.randelshofer.fastdoubleparser.AbstractNumberParser

charAt, charAt, charAt, checkBounds, checkBounds, lookupHex, lookupHex

Methods inherited from class java.lang.Object

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

Field Details

MANY_DIGITS_THRESHOLD

public static final int MANY_DIGITS_THRESHOLD

Threshold on the number of input characters for selecting the algorithm optimised for few digits in the significand vs. the algorithm for many digits in the significand.

Set this to Integer.MAX_VALUE if you only want to use the algorithm optimised for few digits in the significand.

Set this to 0 if you only want to use the algorithm for long inputs.

Rationale for choosing a specific threshold value: We speculate that we only need to use the algorithm for large inputs if there is zero chance, that we can parse the input with the algorithm for small inputs.

 optional significant sign = 1
 18 significant digits = 18
 optional decimal point in significant = 1
 optional exponent = 1
 optional exponent sign = 1
 10 exponent digits = 10
 

See Also:

• Constant Field Values

RECURSION_THRESHOLD

static final int RECURSION_THRESHOLD

Threshold on the number of digits for selecting the recursive algorithm instead of the iterative algorithm.

Set this to Integer.MAX_VALUE if you only want to use the iterative algorithm.

Set this to 0 if you only want to use the recursive algorithm.

Rationale for choosing a specific threshold value: The iterative algorithm has a smaller constant overhead than the recursive algorithm. We speculate that we break even somewhere at twice the threshold value.

See Also:

• Constant Field Values

MAX_EXPONENT_NUMBER

protected static final long MAX_EXPONENT_NUMBER

See Also:

• Constant Field Values

MAX_DIGITS_WITHOUT_LEADING_ZEROS

protected static final int MAX_DIGITS_WITHOUT_LEADING_ZEROS

See JavaBigDecimalParser.

See Also:

• Constant Field Values

Constructor Details

AbstractBigDecimalParser

AbstractBigDecimalParser()

Method Details

hasManyDigits

protected static boolean hasManyDigits(int length)

checkParsedBigDecimalBounds

protected static void checkParsedBigDecimalBounds(boolean illegal,
 int index,
 int endIndex,
 int digitCount,
 long exponent)