org.archive.util

Class ByteOp

java.lang.Object

org.archive.util.ByteOp

public class ByteOp
extends Object

Constructor Summary

Constructors

Constructor and Description
ByteOp()

Method Summary

Methods

Modifier and Type	Method and Description
static byte[]	append(byte[] a, byte[] b)
static long	bytesToInt(byte[] bytes)
static long	bytesToInt(byte[] bytes, int offset)
static long	bytesToInt(int b1, int b2, int b3, int b4)
static int	bytesToShort(byte[] bytes)
static int	bytesToShort(byte[] bytes, int offset)
static int	bytesToShort(int b1, int b2)
static boolean	cmp(byte[] input, byte[] want)
static boolean	cmp(byte[] b1, int src1, byte[] b2, int src2, int n)
static byte[]	copy(byte[] src)
static byte[]	copy(byte[] src, int offset, int length)
static int	discardToNull(InputStream is)
static String	drawHex(byte[] b)
static String	drawHex(byte[] b, int bytesPerRow)
static String	drawHex(byte[] b, int offset, int length, int bytesPerRow)
byte[]	readFile(File f)
static long	readInt(DataInput in)
static long	readInt(InputStream is)
static byte[]	readNBytes(InputStream is, int n)
static int	readShort(DataInput in)
static int	readShort(InputStream is)
static byte[]	readToNull(InputStream is) Read, buffer, and return bytes from is until a null byte is encountered
static byte[]	readToNull(InputStream is, int maxSize) Read, buffer, and return bytes from is until a null byte is encountered
static void	writeInt(byte[] buf, int offset, long intVal)
static void	writeInt(OutputStream os, long intVal)
static void	writeShort(byte[] buf, int offset, int shortVal)
static void	writeShort(OutputStream os, int shortVal)

Methods inherited from class java.lang.Object

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

Constructor Detail

ByteOp

public ByteOp()

Method Detail

copy

public static byte[] copy(byte[] src)

copy

public static byte[] copy(byte[] src,
          int offset,
          int length)

cmp

public static boolean cmp(byte[] input,
          byte[] want)

cmp

public static boolean cmp(byte[] b1,
          int src1,
          byte[] b2,
          int src2,
          int n)

append

public static byte[] append(byte[] a,
            byte[] b)

bytesToShort

public static int bytesToShort(int b1,
               int b2)

bytesToShort

public static int bytesToShort(byte[] bytes,
               int offset)

bytesToShort

public static int bytesToShort(byte[] bytes)

readShort

public static int readShort(DataInput in)
                     throws IOException

Throws:

IOException

readShort

public static int readShort(InputStream is)
                     throws IOException

Throws:

IOException

writeShort

public static void writeShort(OutputStream os,
              int shortVal)
                       throws IOException

Throws:

IOException

writeShort

public static void writeShort(byte[] buf,
              int offset,
              int shortVal)

bytesToInt

public static long bytesToInt(int b1,
              int b2,
              int b3,
              int b4)

bytesToInt

public static long bytesToInt(byte[] bytes,
              int offset)

bytesToInt

public static long bytesToInt(byte[] bytes)

readInt

public static long readInt(DataInput in)
                    throws IOException

Throws:

IOException

readInt

public static long readInt(InputStream is)
                    throws IOException

Throws:

IOException

writeInt

public static void writeInt(OutputStream os,
            long intVal)
                     throws IOException

Throws:

IOException

writeInt

public static void writeInt(byte[] buf,
            int offset,
            long intVal)

readNBytes

public static byte[] readNBytes(InputStream is,
                int n)
                         throws IOException

Throws:

IOException

readToNull

public static byte[] readToNull(InputStream is)
                         throws IOException

Read, buffer, and return bytes from is until a null byte is encountered

Parameters:

is - InputStream to read from

Returns:

array of bytes read, INCLUDING TRAILING NULL

Throws:

IOException - if the underlying stream throws on, OR if the default maximum buffer size is reached before a null byte is found

ShortByteReadException - if EOF is encountered before a null byte

readToNull

public static byte[] readToNull(InputStream is,
                int maxSize)
                         throws IOException

Read, buffer, and return bytes from is until a null byte is encountered

Parameters:

is - InputStream to read from

maxSize - maximum number of bytes to search for the null

Returns:

array of bytes read, INCLUDING TRAILING NULL

Throws:

IOException - if the underlying stream throws on, OR if the specified maximum buffer size is reached before a null byte is found

ShortByteReadException - if EOF is encountered before a null byte

discardToNull

public static int discardToNull(InputStream is)
                         throws IOException

Throws:

IOException

drawHex

public static String drawHex(byte[] b)

drawHex

public static String drawHex(byte[] b,
             int bytesPerRow)

drawHex

public static String drawHex(byte[] b,
             int offset,
             int length,
             int bytesPerRow)

readFile

public byte[] readFile(File f)
                throws FileNotFoundException,
                       IOException

Throws:

FileNotFoundException

IOException