org.ka2ddo.yaac.io
Class KissEscapeOutputStream

java.lang.Object
  java.io.OutputStream
      org.ka2ddo.yaac.io.KissEscapeOutputStream

All Implemented Interfaces:

java.io.Closeable, java.io.Flushable

public class KissEscapeOutputStream
extends java.io.OutputStream

This filtering OutputStream adds the KISS protocol escape sequences for the body of a KISS frame. It also calculates G8BPQ's CRC for the frame if needed for MKISS operations.

Nested Class Summary

static class

KissEscapeOutputStream.RcvState States of a KISS frame decoder.

Field Summary

static int	FEND
static int	FESC
static int	TFEND
static int	TFESC

Constructor Summary

KissEscapeOutputStream(java.io.DataOutput out)
Create a KissEscapeOutputStream wrapped around an implementation of the java.io.DataOutput interface.

KissEscapeOutputStream(java.io.OutputStream os)
Create a KissEscapeOutputStream wrapped around an OutputStream.

Method Summary

int	getByteCount() Get the number of bytes passed through this stream (counting escape codes injected by the stream).
byte	getG8bpqCrc() Get the G8BPQ CRC value for the last sent KISS frame.
void	resetByteCount() Reset the statistics fields for this stream.
void	write(int b) Write one byte to the output stream.

Methods inherited from class java.io.OutputStream

close, flush, write, write

Methods inherited from class java.lang.Object

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

Field Detail

FEND

public static final int FEND

See Also:

Constant Field Values

FESC

public static final int FESC

See Also:

Constant Field Values

TFEND

public static final int TFEND

See Also:

Constant Field Values

TFESC

public static final int TFESC

See Also:

Constant Field Values

Constructor Detail

KissEscapeOutputStream

public KissEscapeOutputStream(java.io.DataOutput out)

Create a KissEscapeOutputStream wrapped around an implementation of the java.io.DataOutput interface.

Parameters:

out - DataOutput interface implementer to wrap with this stream

KissEscapeOutputStream

public KissEscapeOutputStream(java.io.OutputStream os)

Create a KissEscapeOutputStream wrapped around an OutputStream.

Parameters:

os - OutputStream to receive KISS-encoded frames

Method Detail

getByteCount

public int getByteCount()

Get the number of bytes passed through this stream (counting escape codes injected by the stream).

Returns:

byte count

resetByteCount

public void resetByteCount()

Reset the statistics fields for this stream.

write

public void write(int b)
           throws java.io.IOException

Write one byte to the output stream.

Specified by:

write in class java.io.OutputStream

Parameters:

b - byte value to encode

Throws:

java.io.IOException - if wrapped stream throws an IOException

getG8bpqCrc

public byte getG8bpqCrc()

Get the G8BPQ CRC value for the last sent KISS frame.

Returns:

one-byte CRC as used by G8BPQ