1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/jaxws_classes/com/sun/xml/internal/messaging/saaj/packaging/mime/util/LineInputStream.java Wed Apr 27 01:27:09 2016 +0800
1.3 @@ -0,0 +1,112 @@
1.4 +/*
1.5 + * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation. Oracle designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Oracle in the LICENSE file that accompanied this code.
1.13 + *
1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 + * version 2 for more details (a copy is included in the LICENSE file that
1.18 + * accompanied this code).
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License version
1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 + *
1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 + * or visit www.oracle.com if you need additional information or have any
1.26 + * questions.
1.27 + */
1.28 +
1.29 +/*
1.30 + * @(#)LineInputStream.java 1.7 03/01/07
1.31 + */
1.32 +
1.33 +
1.34 +
1.35 +package com.sun.xml.internal.messaging.saaj.packaging.mime.util;
1.36 +
1.37 +import java.io.*;
1.38 +
1.39 +/**
1.40 + * This class is to support reading CRLF terminated lines that
1.41 + * contain only US-ASCII characters from an input stream. Provides
1.42 + * functionality that is similar to the deprecated
1.43 + * <code>DataInputStream.readLine()</code>. Expected use is to read
1.44 + * lines as String objects from a RFC822 stream.
1.45 + *
1.46 + * It is implemented as a FilterInputStream, so one can just wrap
1.47 + * this class around any input stream and read bytes from this filter.
1.48 + *
1.49 + * @author John Mani
1.50 + */
1.51 +
1.52 +public final class LineInputStream extends FilterInputStream {
1.53 +
1.54 + private char[] lineBuffer = null; // reusable byte buffer
1.55 +
1.56 + public LineInputStream(InputStream in) {
1.57 + super(in);
1.58 + }
1.59 +
1.60 + /**
1.61 + * Read a line containing only ASCII characters from the input
1.62 + * stream. A line is terminated by a CR or NL or CR-NL sequence.
1.63 + * A common error is a CR-CR-NL sequence, which will also terminate
1.64 + * a line.
1.65 + * The line terminator is not returned as part of the returned
1.66 + * String. Returns null if no data is available. <p>
1.67 + *
1.68 + * This class is similar to the deprecated
1.69 + * <code>DataInputStream.readLine()</code>
1.70 + */
1.71 + public String readLine() throws IOException {
1.72 + InputStream in = this.in;
1.73 + char[] buf = lineBuffer;
1.74 +
1.75 + if (buf == null)
1.76 + buf = lineBuffer = new char[128];
1.77 +
1.78 + int c1;
1.79 + int room = buf.length;
1.80 + int offset = 0;
1.81 +
1.82 + while ((c1 = in.read()) != -1) {
1.83 + if (c1 == '\n') // Got NL, outa here.
1.84 + break;
1.85 + else if (c1 == '\r') {
1.86 + // Got CR, is the next char NL ?
1.87 + int c2 = in.read();
1.88 + if (c2 == '\r') // discard extraneous CR
1.89 + c2 = in.read();
1.90 + if (c2 != '\n') {
1.91 + // If not NL, push it back
1.92 + if (!(in instanceof PushbackInputStream))
1.93 + in = this.in = new PushbackInputStream(in);
1.94 + ((PushbackInputStream)in).unread(c2);
1.95 + }
1.96 + break; // outa here.
1.97 + }
1.98 +
1.99 + // Not CR, NL or CR-NL ...
1.100 + // .. Insert the byte into our byte buffer
1.101 + if (--room < 0) { // No room, need to grow.
1.102 + buf = new char[offset + 128];
1.103 + room = buf.length - offset - 1;
1.104 + System.arraycopy(lineBuffer, 0, buf, 0, offset);
1.105 + lineBuffer = buf;
1.106 + }
1.107 + buf[offset++] = (char)c1;
1.108 + }
1.109 +
1.110 + if ((c1 == -1) && (offset == 0))
1.111 + return null;
1.112 +
1.113 + return String.copyValueOf(buf, 0, offset);
1.114 + }
1.115 +}
