/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can obtain
* a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
* or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
* Sun designates this particular file as subject to the "Classpath" exception
* as provided by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the License
* Header, with the fields enclosed by brackets [] replaced by your own
* identifying information: "Portions Copyrighted [year]
* [name of copyright owner]"
*
* Contributor(s):
*
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
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*/
package com.sun.mail.util;
import java.io.*;
/**
* Convert lines into the canonical format, that is, terminate lines with the
* CRLF sequence.
*
* @author John Mani
*/
public class CRLFOutputStream extends FilterOutputStream {
protected int lastb = -1;
protected boolean atBOL = true; // at beginning of line?
private static final byte[] newline = { (byte)'\r', (byte)'\n' };
public CRLFOutputStream(OutputStream os) {
super(os);
}
public void write(int b) throws IOException {
if (b == '\r') {
writeln();
} else if (b == '\n') {
if (lastb != '\r')
writeln();
} else {
out.write(b);
atBOL = false;
}
lastb = b;
}
public void write(byte b[]) throws IOException {
write(b, 0, b.length);
}
public void write(byte b[], int off, int len) throws IOException {
int start = off;
len += off;
for (int i = start; i < len ; i++) {
if (b[i] == '\r') {
out.write(b, start, i - start);
writeln();
start = i + 1;
} else if (b[i] == '\n') {
if (lastb != '\r') {
out.write(b, start, i - start);
writeln();
}
start = i + 1;
}
lastb = b[i];
}
if ((len - start) > 0) {
out.write(b, start, len - start);
atBOL = false;
}
}
/*
* Just write out a new line, something similar to out.println()
*/
public void writeln() throws IOException {
out.write(newline);
atBOL = true;
}
}
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