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

Constructors

Constructor and Description
CpioUtil()

Method Summary

Modifier and Type	Method and Description
(package private) static long	byteArray2long(byte[] number, boolean swapHalfWord) Converts a byte array to a long.
(package private) static long	fileType(long mode) Extracts the file type bits from a mode.
(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

fileType

static long fileType(long mode)

Extracts the file type bits from a mode.

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