JavaFX 27 · com.sun.javafx.css.parser.CssNumberParser

Modifier and Type	Field and Description
private static final int	EXP_LIMIT
private static final int	MAX_SIG_DIGITS
private static final long[]	T 128-bit reciprocal and normalized powers of five, stored as two 64-bit words.

Access	Constructor and Description
private	CssNumberParser()

Method Summary

Modifier and Type	Method and Description
private static double	convertToNearestDouble(long w, int q) Converts a decimal floating-point number `w*10^q` to the nearest representable double.
private static double	normalDouble(long m, long p)
public static double	parseDouble(String s) Parses a number according to the W3C "Consume a number" algorithm.
public static double	parseDouble(String s, int start, int end) Parses a number according to the W3C "Consume a number" algorithm.
public static double	Returns: the number, or NaN if the substring does not consist entirely of a valid number representation tryParseDouble(String s, int start, int end) Parses a number according to the W3C "Consume a number" algorithm.
public static long	tryParseInt(String s, int start, int end, int radix) Parses a number as an integer.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

EXP_LIMIT	back to summary
private static final int EXP_LIMIT

MAX_SIG_DIGITS	back to summary
private static final int MAX_SIG_DIGITS

T	back to summary
private static final long[] T 128-bit reciprocal and normalized powers of five, stored as two 64-bit words. See "Table Generation Script" in "Number Parsing at a Gigabyte per Second" (Lemire, 2021), p. 32 See Also Number Parsing at a Gigabyte per Second

CssNumberParser	back to summary
private CssNumberParser()

Method Detail

convertToNearestDouble back to summary

convertToNearestDouble	back to summary
private static double convertToNearestDouble(long w, int q) Converts a decimal floating-point number `w*10^q` to the nearest representable double. Based on Algorithm 1, "Number Parsing at a Gigabyte per Second" (Lemire, 2021), p. 8, without the fallback condition; see "Fast Number Parsing Without Fallback" (Mushtak, Lemire, 2022). Precondition `w != 0` and `q in [-342, 308]` See Also Number Parsing at a Gigabyte per Second, Fast Number Parsing Without Fallback

private static double convertToNearestDouble(long w, int q)

Converts a decimal floating-point number w*10^q to the nearest representable double.

Based on Algorithm 1, "Number Parsing at a Gigabyte per Second" (Lemire, 2021), p. 8, without the fallback condition; see "Fast Number Parsing Without Fallback" (Mushtak, Lemire, 2022).

Precondition

w != 0 and q in [-342, 308]

See Also: Number Parsing at a Gigabyte per Second, Fast Number Parsing Without Fallback

normalDouble	back to summary
private static double normalDouble(long m, long p)

parseDouble	back to summary
public static double parseDouble(String s) Parses a number according to the W3C "Consume a number" algorithm. A number can have integer and fractional parts, and it supports E notation (exponential). Exceptions NumberFormatException: if the string does not consist entirely of a valid number representation See Also Consume a number

parseDouble

back to summary

public static double parseDouble(String s)

Parses a number according to the W3C "Consume a number" algorithm. A number can have integer and fractional parts, and it supports E notation (exponential).

Exceptions

NumberFormatException:: if the string does not consist entirely of a valid number representation

See Also

Consume a number

parseDouble	back to summary
public static double parseDouble(String s, int start, int end) Parses a number according to the W3C "Consume a number" algorithm. A number can have integer and fractional parts, and it supports E notation (exponential). Exceptions NumberFormatException: if the substring does not consist entirely of a valid number representation See Also Consume a number

parseDouble

back to summary

public static double parseDouble(String s, int start, int end)

Parses a number according to the W3C "Consume a number" algorithm. A number can have integer and fractional parts, and it supports E notation (exponential).

Exceptions

NumberFormatException:: if the substring does not consist entirely of a valid number representation

See Also

Consume a number

tryParseDouble back to summary

tryParseDouble	back to summary
public static double tryParseDouble(String s, int start, int end) Parses a number according to the W3C "Consume a number" algorithm. A number can have integer and fractional parts, and it supports E notation (exponential). This method operates on the substring `[start, end)` of `s`, which is expected to contain the string representation of a number without leading or trailing whitespace. This implementation is allocation-free for significands with less than 20 digits and returns the nearest representable double value of the input string, with ties rounding to even. Returns:double the number, or NaN if the substring does not consist entirely of a valid number representation See Also Consume a number

public static double tryParseDouble(String s, int start, int end)

Parses a number according to the W3C "Consume a number" algorithm. A number can have integer and fractional parts, and it supports E notation (exponential).

This method operates on the substring [start, end) of s, which is expected to contain the string representation of a number without leading or trailing whitespace.

This implementation is allocation-free for significands with less than 20 digits and returns the nearest representable double value of the input string, with ties rounding to even.

Returns:double: the number, or NaN if the substring does not consist entirely of a valid number representation
See Also: Consume a number

tryParseInt	back to summary
public static long tryParseInt(String s, int start, int end, int radix) Parses a number as an integer. If successful, returns the integer as a long value; otherwise returns a long value less than `Integer#MIN_VALUE` to indicate failure.

public final Class CssNumberParser

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Constructor Summary

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Field Detail

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Method Detail