X-Git-Url: http://git.nikiroo.be/?a=blobdiff_plain;f=src%2Fjexer%2Fnet%2FTelnetOutputStream.java;h=6e7536a847f3bcb5e9a68b2c90f38026f2ed2694;hb=738dd8c426dcc6ed2508d68b7985f68d66549889;hp=338de2c24f4115198445d5c709a246a90aa29978;hpb=d36057dfab8def933a64be042b039d76708ac5ba;p=fanfix.git diff --git a/src/jexer/net/TelnetOutputStream.java b/src/jexer/net/TelnetOutputStream.java deleted file mode 100644 index 338de2c..0000000 --- a/src/jexer/net/TelnetOutputStream.java +++ /dev/null @@ -1,260 +0,0 @@ -/* - * Jexer - Java Text User Interface - * - * The MIT License (MIT) - * - * Copyright (C) 2017 Kevin Lamonte - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING - * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER - * DEALINGS IN THE SOFTWARE. - * - * @author Kevin Lamonte [kevin.lamonte@gmail.com] - * @version 1 - */ -package jexer.net; - -import java.io.OutputStream; -import java.io.IOException; - -import static jexer.net.TelnetSocket.*; - -/** - * TelnetOutputStream works with TelnetSocket to perform the telnet protocol. - */ -public final class TelnetOutputStream extends OutputStream { - - // ------------------------------------------------------------------------ - // Variables -------------------------------------------------------------- - // ------------------------------------------------------------------------ - - /** - * The root TelnetSocket that has my telnet protocol state. - */ - private TelnetSocket master; - - /** - * The raw socket's OutputStream. - */ - private OutputStream output; - - /** - * When true, the last byte the caller passed to write() was a CR. - */ - private boolean writeCR = false; - - // ------------------------------------------------------------------------ - // Constructors ----------------------------------------------------------- - // ------------------------------------------------------------------------ - - /** - * Package private constructor. - * - * @param master the master TelnetSocket - * @param output the underlying socket's OutputStream - */ - TelnetOutputStream(final TelnetSocket master, final OutputStream output) { - this.master = master; - this.output = output; - } - - // ------------------------------------------------------------------------ - // OutputStrem ------------------------------------------------------------ - // ------------------------------------------------------------------------ - - /** - * Closes this output stream and releases any system resources associated - * with this stream. - * - * @throws IOException if an I/O error occurs - */ - @Override - public void close() throws IOException { - if (output != null) { - output.close(); - output = null; - } - } - - /** - * Flushes this output stream and forces any buffered output bytes to be - * written out. - * - * @throws IOException if an I/O error occurs - */ - @Override - public void flush() throws IOException { - if ((master.binaryMode == false) && (writeCR == true)) { - // The last byte sent to this.write() was a CR, which was never - // actually sent. So send the CR in ascii mode, then flush. - // CR -> CR NULL - output.write(C_CR); - output.write(C_NUL); - writeCR = false; - } - output.flush(); - } - - /** - * Writes b.length bytes from the specified byte array to this output - * stream. - * - * @param b the data. - * @throws IOException if an I/O error occurs - */ - @Override - public void write(final byte[] b) throws IOException { - writeImpl(b, 0, b.length); - } - - /** - * Writes len bytes from the specified byte array starting at offset off - * to this output stream. - * - * @param b the data. - * @param off the start offset in the data. - * @param len the number of bytes to write. - * @throws IOException if an I/O error occurs - */ - @Override - public void write(final byte[] b, final int off, - final int len) throws IOException { - - writeImpl(b, off, len); - } - - /** - * Writes the specified byte to this output stream. - * - * @param b the byte to write. - * @throws IOException if an I/O error occurs - */ - @Override - public void write(final int b) throws IOException { - byte [] bytes = new byte[1]; - bytes[0] = (byte)b; - writeImpl(bytes, 0, 1); - } - - // ------------------------------------------------------------------------ - // TelnetOutputStrem ------------------------------------------------------ - // ------------------------------------------------------------------------ - - /** - * Writes b.length bytes from the specified byte array to this output - * stream. Note package private access. - * - * @param b the data. - * @throws IOException if an I/O error occurs - */ - void rawWrite(final byte[] b) throws IOException { - output.write(b, 0, b.length); - } - - /** - * Writes len bytes from the specified byte array starting at offset off - * to this output stream. - * - * @param b the data. - * @param off the start offset in the data. - * @param len the number of bytes to write. - * @throws IOException if an I/O error occurs - */ - private void writeImpl(final byte[] b, final int off, - final int len) throws IOException { - - byte [] writeBuffer = new byte[Math.max(len, 4)]; - int writeBufferI = 0; - - for (int i = 0; i < len; i++) { - if (writeBufferI >= writeBuffer.length - 4) { - // Flush what we have generated so far and reset the buffer, - // because the next byte could generate up to 4 output bytes - // (CR ). - output.write(writeBuffer, 0, writeBufferI); - writeBufferI = 0; - } - - // Pull the next byte - byte ch = b[i + off]; - - if (master.binaryMode == true) { - - if (ch == TELNET_IAC) { - // IAC -> IAC IAC - writeBuffer[writeBufferI++] = (byte)TELNET_IAC; - writeBuffer[writeBufferI++] = (byte)TELNET_IAC; - } else { - // Anything else -> just send - writeBuffer[writeBufferI++] = ch; - } - continue; - } - - // Non-binary mode: more complicated. We use writeCR to handle - // the case that the last byte of b was a CR. - - // Bare carriage return -> CR NUL - if (ch == C_CR) { - if (writeCR == true) { - // Flush the previous CR to the stream. - // CR -> CR NULL - writeBuffer[writeBufferI++] = (byte)C_CR; - writeBuffer[writeBufferI++] = (byte)C_NUL; - } - writeCR = true; - } else if (ch == C_LF) { - if (writeCR == true) { - // CR LF -> CR LF - writeBuffer[writeBufferI++] = (byte)C_CR; - writeBuffer[writeBufferI++] = (byte)C_LF; - writeCR = false; - } else { - // Bare LF -> LF - writeBuffer[writeBufferI++] = ch; - } - } else if (ch == TELNET_IAC) { - if (writeCR == true) { - // CR -> CR NULL - writeBuffer[writeBufferI++] = (byte)C_CR; - writeBuffer[writeBufferI++] = (byte)C_NUL; - writeCR = false; - } - // IAC -> IAC IAC - writeBuffer[writeBufferI++] = (byte)TELNET_IAC; - writeBuffer[writeBufferI++] = (byte)TELNET_IAC; - } else { - if (writeCR == true) { - // CR -> CR NULL - writeBuffer[writeBufferI++] = (byte)C_CR; - writeBuffer[writeBufferI++] = (byte)C_NUL; - writeCR = false; - } else { - // Normal character */ - writeBuffer[writeBufferI++] = ch; - } - } - - } // while (i < userbuf.length) - - if (writeBufferI > 0) { - // Flush what we have generated so far and reset the buffer. - output.write(writeBuffer, 0, writeBufferI); - } - } - -}