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The source code

/*
 * Copyright 2001-2004 The Apache Software Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.commons.net.telnet;
import java.io.IOException;
import java.io.OutputStream;

/***
 *
 * 

* *

*

* @author Daniel F. Savarese ***/ final class TelnetOutputStream extends OutputStream { private TelnetClient __client; private boolean __convertCRtoCRLF = true; private boolean __lastWasCR = false; TelnetOutputStream(TelnetClient client) { __client = client; } /*** * Writes a byte to the stream. *

* @param ch The byte to write. * @exception IOException If an error occurs while writing to the underlying * stream. ***/ public void write(int ch) throws IOException { synchronized (__client) { ch &= 0xff; if (__client._requestedWont(TelnetOption.BINARY)) { if (__lastWasCR) { if (__convertCRtoCRLF) { __client._sendByte('\n'); if (ch == '\n') { __lastWasCR = false; return ; } } else if (ch != '\n') __client._sendByte('\0'); } __lastWasCR = false; switch (ch) { case '\r': __client._sendByte('\r'); __lastWasCR = true; break; case TelnetCommand.IAC: __client._sendByte(TelnetCommand.IAC); __client._sendByte(TelnetCommand.IAC); break; default: __client._sendByte(ch); break; } } else if (ch == TelnetCommand.IAC) { __client._sendByte(ch); __client._sendByte(TelnetCommand.IAC); } else __client._sendByte(ch); } } /*** * Writes a byte array to the stream. *

* @param buffer The byte array to write. * @exception IOException If an error occurs while writing to the underlying * stream. ***/ public void write(byte buffer[]) throws IOException { write(buffer, 0, buffer.length); } /*** * Writes a number of bytes from a byte array to the stream starting from * a given offset. *

* @param buffer The byte array to write. * @param offset The offset into the array at which to start copying data. * @param length The number of bytes to write. * @exception IOException If an error occurs while writing to the underlying * stream. ***/ public void write(byte buffer[], int offset, int length) throws IOException { synchronized (__client) { while (length-- > 0) write(buffer[offset++]); } } /*** Flushes the stream. ***/ public void flush() throws IOException { __client._flushOutputStream(); } /*** Closes the stream. ***/ public void close() throws IOException { __client._closeOutputStream(); } }

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