org.apache.commons.compress.archivers.cpio
Class CpioUtil

java.lang.Object
  org.apache.commons.compress.archivers.cpio.CpioUtil

 class CpioUtil
extends java.lang.Object

Package private utility class for Cpio

Constructor Summary

CpioUtil()

Method Summary

(package private) static long	byteArray2long(byte[] number, boolean swapHalfWord) Converts a byte array to a long.
(package private) static byte[]	long2byteArray(long number, int length, boolean swapHalfWord) Converts a long number to a byte array Halfwords can be swapped by setting swapHalfWord=true.

Methods inherited from class java.lang.Object

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

Constructor Detail

CpioUtil

CpioUtil()

Method Detail

byteArray2long

static long byteArray2long(byte[] number,
                           boolean swapHalfWord)

Converts a byte array to a long. Halfwords can be swapped by setting swapHalfWord=true.

Parameters:

number - An array of bytes containing a number

swapHalfWord - Swap halfwords ([0][1][2][3]->[1][0][3][2])

Returns:

The long value

Throws:

java.lang.UnsupportedOperationException - if number length is not a multiple of 2

long2byteArray

static byte[] long2byteArray(long number,
                             int length,
                             boolean swapHalfWord)

Converts a long number to a byte array Halfwords can be swapped by setting swapHalfWord=true.

Parameters:

number - the input long number to be converted

length - The length of the returned array

swapHalfWord - Swap halfwords ([0][1][2][3]->[1][0][3][2])

Returns:

The long value

Throws:

java.lang.UnsupportedOperationException - if the length is not a positive multiple of two