Mercurial > hg > Applications > TightVNC_orginal
view src/main/java/com/glavsoft/transport/Reader.java @ 0:4689cc86d6cb
create TreeViewer2 Repository
author | Yu Taninari <you@cr.ie.u-ryukyu.ac.jp> |
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date | Tue, 03 Jul 2012 13:20:49 +0900 |
parents | |
children | e7ce2b2ffed8 472a9bcacb21 |
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// Copyright (C) 2010, 2011 GlavSoft LLC. // All rights reserved. // //------------------------------------------------------------------------- // This file is part of the TightVNC software. Please visit our Web site: // // http://www.tightvnc.com/ // // This program is free software; you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation; either version 2 of the License, or // (at your option) any later version. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License along // with this program; if not, write to the Free Software Foundation, Inc., // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. //------------------------------------------------------------------------- // package com.glavsoft.transport; import com.glavsoft.exceptions.ClosedConnectionException; import com.glavsoft.exceptions.TransportException; import java.io.*; import java.nio.charset.Charset; public class Reader { final static Charset ISO_8859_1 = Charset.forName("ISO-8859-1"); private final DataInputStream is; public Reader(InputStream is) { this.is = new DataInputStream(new BufferedInputStream(is)); } public byte readByte() throws TransportException { try { byte readByte = is.readByte(); return readByte; } catch (EOFException e) { throw new ClosedConnectionException(e); } catch (IOException e) { throw new TransportException("Cannot read byte", e); } } public int readUInt8() throws TransportException { return readByte() & 0x0ff; } public int readUInt16() throws TransportException { return readInt16() & 0x0ffff; } public short readInt16() throws TransportException { try { short readShort = is.readShort(); return readShort; } catch (EOFException e) { throw new ClosedConnectionException(e); } catch (IOException e) { throw new TransportException("Cannot read int16", e); } } public long readUInt32() throws TransportException { return readInt32() & 0xffffffffL; } public int readInt32() throws TransportException { try { int readInt = is.readInt(); return readInt; } catch (EOFException e) { throw new ClosedConnectionException(e); } catch (IOException e) { throw new TransportException("Cannot read int16", e); } } /** * Read string by it length. * Use this method only when sure no character accept ASCII will be read. * Use readBytes and character encoding conversion instead. * * @return String read */ public String readString(int length) throws TransportException { return new String(readBytes(length)); } /** * Read 32-bit string length and then string themself by it length * Use this method only when sure no character accept ASCII will be read. * Use readBytes and character encoding conversion instead. * * @return String read * @throws TransportException */ public String readString() throws TransportException { // unset most sighificant (sign) bit 'cause InputStream#readFully // reads // [int] length bytes from stream. Change when realy need read sthing more // than // 2147483647 bytes lenght int length = readInt32() & Integer.MAX_VALUE; return readString(length); } public byte[] readBytes(int length) throws TransportException { byte b[] = new byte[length]; return readBytes(b, 0, length); } public byte[] readBytes(byte[] b, int offset, int length) throws TransportException { try { is.readFully(b, offset, length); return b; } catch (EOFException e) { throw new ClosedConnectionException(e); } catch (IOException e) { throw new TransportException("Cannot read " + length + " bytes array", e); } } }