1 /* CRLFOutputStream.java --
2 Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
4 This file is part of GNU Classpath.
6 GNU Classpath is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
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18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 Linking this library statically or dynamically with other modules is
22 making a combined work based on this library. Thus, the terms and
23 conditions of the GNU General Public License cover the whole
26 As a special exception, the copyright holders of this library give you
27 permission to link this library with independent modules to produce an
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30 terms of your choice, provided that you also meet, for each linked
31 independent module, the terms and conditions of the license of that
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36 exception statement from your version.
38 package org.sonews.util.io; // original package: gnu.java.net
40 import java.io.FilterOutputStream;
41 import java.io.IOException;
42 import java.io.OutputStream;
43 import java.io.UnsupportedEncodingException;
46 * An output stream that filters LFs into CR/LF pairs.
48 * @author Chris Burdess (dog@gnu.org)
50 public class CRLFOutputStream extends FilterOutputStream {
52 static final String US_ASCII = "US-ASCII";
56 public static final int CR = 13;
60 public static final int LF = 10;
64 public static final byte[] CRLF = {CR, LF};
71 * Constructs a CR/LF output stream connected to the specified output stream.
73 public CRLFOutputStream(OutputStream out) {
79 * Writes a character to the underlying stream.
80 * @exception IOException if an I/O error occurred
83 public void write(int ch) throws IOException {
86 } else if (ch == LF) {
97 * Writes a byte array to the underlying stream.
98 * @exception IOException if an I/O error occurred
101 public void write(byte[] b) throws IOException {
102 write(b, 0, b.length);
106 * Writes a portion of a byte array to the underlying stream.
107 * @exception IOException if an I/O error occurred
110 public void write(byte[] b, int off, int len) throws IOException {
113 for (int i = off; i < len; i++) {
116 out.write(b, d, i - d);
117 out.write(CRLF, 0, 2);
122 out.write(b, d, i - d);
123 out.write(CRLF, 0, 2);
131 out.write(b, d, len - d);
136 * Writes the specified ASCII string to the underlying stream.
137 * @exception IOException if an I/O error occurred
139 public void write(String text) throws IOException {
141 byte[] bytes = text.getBytes(US_ASCII);
142 write(bytes, 0, bytes.length);
143 } catch (UnsupportedEncodingException e) {
144 throw new IOException("The US-ASCII encoding is not supported on this system", e);
149 * Writes a newline to the underlying stream.
150 * @exception IOException if an I/O error occurred
152 public void writeln() throws IOException {
153 out.write(CRLF, 0, 2);