Package org.hortonmachine.gears.io.dxfdwg.libs.dwg.utils

Class HexUtil

java.lang.Object

org.hortonmachine.gears.io.dxfdwg.libs.dwg.utils.HexUtil

public class HexUtil
extends Object

Number in hexadecimal format are used throughout Freenet.

Unless otherwise stated, the conventions follow the rules outlined in the Java Language Specification.

Author:

syoung

Method Summary

Modifier and Type	Method	Description
static byte[]	bitsToBytes(BitSet ba, int size)	Pack the bits in ba into a byte[].
static String	bitsToHexString(BitSet ba, int size)	Pack the bits in ba into a byte[] then convert that to a hex string and return it.
static void	bytesToBits(byte[] b, BitSet ba, int maxSize)	Read bits from a byte array into a bitset
static String	bytesToHex(byte[] bs)
static String	bytesToHex(byte[] bs, int off, int length)	Converts a byte array into a string of upper case hex chars.
static void	bytesToHexAppend(byte[] bs, int off, int length, StringBuffer sb)
static int	countBytesForBits(int size)
static void	hexToBits(String s, BitSet ba, int length)	Read a hex string of bits and write it into a bitset
static byte[]	hexToBytes(String s)
static void	hexToBytes(String s, byte[] out, int off)	Converts a String of hex characters into an array of bytes.
static byte[]	hexToBytes(String s, int off)

Methods inherited from class java.lang.Object

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

Method Detail

bytesToHex

public static final String bytesToHex(byte[] bs,
                                      int off,
                                      int length)

Converts a byte array into a string of upper case hex chars.

Parameters:

bs - A byte array

off - The index of the first byte to read

length - The number of bytes to read.

Returns:

the string of hex chars.

bytesToHexAppend

public static final void bytesToHexAppend(byte[] bs,
                                          int off,
                                          int length,
                                          StringBuffer sb)

bytesToHex

public static final String bytesToHex(byte[] bs)

hexToBytes

public static final byte[] hexToBytes(String s)

hexToBytes

public static final byte[] hexToBytes(String s,
                                      int off)

hexToBytes

public static final void hexToBytes(String s,
                                    byte[] out,
                                    int off)
                             throws NumberFormatException,
                                    IndexOutOfBoundsException

Converts a String of hex characters into an array of bytes.

Parameters:

s - A string of hex characters (upper case or lower) of even length.

out - A byte array of length at least s.length()/2 + off

off - The first byte to write of the array

Throws:

NumberFormatException

IndexOutOfBoundsException

bitsToBytes

public static final byte[] bitsToBytes(BitSet ba,
                                       int size)

Pack the bits in ba into a byte[].

bitsToHexString

public static final String bitsToHexString(BitSet ba,
                                           int size)

Pack the bits in ba into a byte[] then convert that to a hex string and return it.

countBytesForBits

public static int countBytesForBits(int size)

Returns:

the number of bytes required to represent the bitset

bytesToBits

public static void bytesToBits(byte[] b,
                               BitSet ba,
                               int maxSize)

Read bits from a byte array into a bitset

Parameters:

b - the byte[] to read from

ba - the bitset to write to

hexToBits

public static void hexToBits(String s,
                             BitSet ba,
                             int length)

Read a hex string of bits and write it into a bitset

Parameters:

s - hex string of the stored bits

ba - the bitset to store the bits in

length - the maximum number of bits to store