Apache PDFBox 3.0.4 · org.apache.pdfbox.util.NumberFormatUtil

Modifier and Type	Field and Description
private static final int	MAX_FRACTION_DIGITS Maximum number of fraction digits supported by the format methods
private static final long[]	POWER_OF_TENS Contains the power of ten values for fast lookup in the format methods
private static final int[]	POWER_OF_TENS_INT

Access	Constructor and Description
private	NumberFormatUtil()

Method Summary

Modifier and Type	Method and Description
public static int	Returns: The number of bytes used in the buffer or `-1` if formatting failed formatFloatFast(float The float value to format value, int The maximum number of fraction digits used maxFractionDigits, byte[] The output buffer to write the formatted value to asciiBuffer) Fast variant to format a floating point value to a ASCII-string.
private static int	Returns: The offset into the buffer which contains the first byte that was not filled by the method formatPositiveNumber(long The number to format number, int The start digit exp, boolean Whether the formatting should stop if only trailing zeros are left. This is needed e.g. when formatting fractions of a number. omitTrailingZeros, byte[] The buffer to write the ASCII digits to asciiBuffer, int The start offset into the buffer to start writing startOffset) Formats a positive integer number starting with the digit at `10^exp`.
private static int	getExponent(long number) Returns the highest exponent of 10 where `10^exp < number` for numbers > 0

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

MAX_FRACTION_DIGITS	back to summary
private static final int MAX_FRACTION_DIGITS Maximum number of fraction digits supported by the format methods

POWER_OF_TENS	back to summary
private static final long[] POWER_OF_TENS Contains the power of ten values for fast lookup in the format methods

POWER_OF_TENS_INT	back to summary
private static final int[] POWER_OF_TENS_INT

NumberFormatUtil	back to summary
private NumberFormatUtil()

Method Detail

formatFloatFast back to summary

formatFloatFast	back to summary
public static int formatFloatFast(float value, int maxFractionDigits, byte[] asciiBuffer) Fast variant to format a floating point value to a ASCII-string. The format will fail if the value is greater than `Long#MAX_VALUE`, smaller or equal to `Long#MIN_VALUE`, is `Float#NaN`, infinite or the number of requested fraction digits is greater than `MAX_FRACTION_DIGITS`. When the number contains more fractional digits than `maxFractionDigits` the value will be rounded. Rounding is done to the nearest possible value, with the tie breaking rule of rounding away from zero. Parameters value:float The float value to format maxFractionDigits:int The maximum number of fraction digits used asciiBuffer:byte[] The output buffer to write the formatted value to Returns:int The number of bytes used in the buffer or `-1` if formatting failed

public static int formatFloatFast(float value, int maxFractionDigits, byte[] asciiBuffer)

Fast variant to format a floating point value to a ASCII-string. The format will fail if the value is greater than Long#MAX_VALUE, smaller or equal to Long#MIN_VALUE, is Float#NaN, infinite or the number of requested fraction digits is greater than MAX_FRACTION_DIGITS. When the number contains more fractional digits than maxFractionDigits the value will be rounded. Rounding is done to the nearest possible value, with the tie breaking rule of rounding away from zero.

Parameters

value:float: The float value to format
maxFractionDigits:int: The maximum number of fraction digits used
asciiBuffer:byte[]: The output buffer to write the formatted value to

Returns:int

The number of bytes used in the buffer or -1 if formatting failed

formatPositiveNumber back to summary

formatPositiveNumber	back to summary
private static int formatPositiveNumber(long number, int exp, boolean omitTrailingZeros, byte[] asciiBuffer, int startOffset) Formats a positive integer number starting with the digit at `10^exp`. Parameters number:long The number to format exp:int The start digit omitTrailingZeros:boolean Whether the formatting should stop if only trailing zeros are left. This is needed e.g. when formatting fractions of a number. asciiBuffer:byte[] The buffer to write the ASCII digits to startOffset:int The start offset into the buffer to start writing Returns:int The offset into the buffer which contains the first byte that was not filled by the method

private static int formatPositiveNumber(long number, int exp, boolean omitTrailingZeros, byte[] asciiBuffer, int startOffset)

Formats a positive integer number starting with the digit at 10^exp.

Parameters

number:long: The number to format
exp:int: The start digit
omitTrailingZeros:boolean: Whether the formatting should stop if only trailing zeros are left. This is needed e.g. when formatting fractions of a number.
asciiBuffer:byte[]: The buffer to write the ASCII digits to
startOffset:int: The start offset into the buffer to start writing

Returns:int

The offset into the buffer which contains the first byte that was not filled by the method

getExponent	back to summary
private static int getExponent(long number) Returns the highest exponent of 10 where `10^exp < number` for numbers > 0

public Class NumberFormatUtil

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Method Detail