com.sun.xml.messaging.saaj.packaging.mime.util.OutputUtil Maven / Gradle / Ivy

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/*
 * Copyright (c) 1997, 2020 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Distribution License v. 1.0, which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

/*
 * @(#)OutputUtil.java  1.6 02/03/27
 */



package com.sun.xml.messaging.saaj.packaging.mime.util;

import java.io.OutputStream;
import java.io.IOException;

/**
 * This class is to support writing out Strings as a sequence of bytes
 * terminated by a CRLF sequence. The String must contain only US-ASCII
 * characters.
 *
 * The expected use is to write out RFC822 style headers to an output
 * stream. 

 *
 * @author Kohsuke Kawaguchi
 */
public abstract class OutputUtil {
    private static byte[] newline = {'\r','\n'};

    public static void writeln(String s,OutputStream out) throws IOException {
        writeAsAscii(s,out);
        writeln(out);
    }

    /**
     * Writes a string as ASCII string.
     *
     * @param s string.
     * @param out output stream.
     *
     * @throws IOException if an I/O error occurs.
     */
    public static void writeAsAscii(String s,OutputStream out) throws IOException {
        int len = s.length();
        for( int i=0; i