jaxws/src/java.xml.soap/share/classes/com/sun/xml/internal/messaging/saaj/packaging/mime/util/UUEncoderStream.java
changeset 25871 b80b84e87032
parent 22679 d785acd84a14
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jaxws/src/java.xml.soap/share/classes/com/sun/xml/internal/messaging/saaj/packaging/mime/util/UUEncoderStream.java	Sun Aug 17 15:52:15 2014 +0100
@@ -0,0 +1,206 @@
+/*
+ * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @(#)UUEncoderStream.java   1.3 02/03/27
+ */
+
+
+
+package com.sun.xml.internal.messaging.saaj.packaging.mime.util;
+
+import java.io.*;
+
+/**
+ * This class implements a UUEncoder. It is implemented as
+ * a FilterOutputStream, so one can just wrap this class around
+ * any output stream and write bytes into this filter. The Encoding
+ * is done as the bytes are written out.
+ *
+ * @author John Mani
+ */
+
+public class UUEncoderStream extends FilterOutputStream {
+    private byte[] buffer;      // cache of bytes that are yet to be encoded
+    private int bufsize = 0;    // size of the cache
+    private boolean wrotePrefix = false;
+
+    protected String name;      // name of file
+    protected int mode;         // permissions mode
+
+    /**
+     * Create a UUencoder that encodes the specified input stream
+     * @param out        the output stream
+     */
+    public UUEncoderStream(OutputStream out) {
+        this(out, "encoder.buf", 644);
+    }
+
+    /**
+     * Create a UUencoder that encodes the specified input stream
+     * @param out        the output stream
+     * @param name       Specifies a name for the encoded buffer
+     */
+    public UUEncoderStream(OutputStream out, String name) {
+        this(out, name, 644);
+    }
+
+    /**
+     * Create a UUencoder that encodes the specified input stream
+     * @param out        the output stream
+     * @param name       Specifies a name for the encoded buffer
+     * @param mode       Specifies permission mode for the encoded buffer
+     */
+    public UUEncoderStream(OutputStream out, String name, int mode) {
+        super(out);
+        this.name = name;
+        this.mode = mode;
+        buffer = new byte[45];
+    }
+
+    /**
+     * Set up the buffer name and permission mode.
+     * This method has any effect only if it is invoked before
+     * you start writing into the output stream
+     */
+    public void setNameMode(String name, int mode) {
+        this.name = name;
+        this.mode = mode;
+    }
+
+    public void write(byte[] b, int off, int len) throws IOException {
+        for (int i = 0; i < len; i++)
+            write(b[off + i]);
+    }
+
+    public void write(byte[] data) throws IOException {
+        write(data, 0, data.length);
+    }
+
+    public void write(int c) throws IOException {
+        /* buffer up characters till we get a line's worth, then encode
+         * and write them out. Max number of characters allowed per
+         * line is 45.
+         */
+        buffer[bufsize++] = (byte)c;
+        if (bufsize == 45) {
+            writePrefix();
+            encode();
+            bufsize = 0;
+        }
+    }
+
+    public void flush() throws IOException {
+        if (bufsize > 0) { // If there's unencoded characters in the buffer
+            writePrefix();
+            encode();      // .. encode them
+        }
+        writeSuffix();
+        out.flush();
+    }
+
+    public void close() throws IOException {
+        flush();
+        out.close();
+    }
+
+    /**
+     * Write out the prefix: "begin <mode> <name>"
+     */
+    private void writePrefix() throws IOException {
+        if (!wrotePrefix) {
+            PrintStream ps = new PrintStream(out);
+            ps.println("begin " + mode + " " + name);
+            ps.flush();
+            wrotePrefix = true;
+        }
+    }
+
+    /**
+     * Write a single line containing space and the suffix line
+     * containing the single word "end" (terminated by a newline)
+     */
+    private void writeSuffix() throws IOException {
+        PrintStream ps = new PrintStream(out);
+        ps.println(" \nend");
+        ps.flush();
+    }
+
+    /**
+     * Encode a line.
+     * Start off with the character count, followed by the encoded atoms
+     * and terminate with LF. (or is it CRLF or the local line-terminator ?)
+     * Take three bytes and encodes them into 4 characters
+     * If bufsize if not a multiple of 3, the remaining bytes are filled
+     * with '1'. This insures that the last line won't end in spaces
+     * and potentiallly be truncated.
+     */
+    private void encode() throws IOException {
+        byte a, b, c;
+        int c1, c2, c3, c4;
+        int i = 0;
+
+        // Start off with the count of characters in the line
+        out.write((bufsize & 0x3f) + ' ');
+
+        while (i < bufsize) {
+            a = buffer[i++];
+            if (i < bufsize) {
+                b = buffer[i++];
+                if (i < bufsize)
+                    c = buffer[i++];
+                else // default c to 1
+                    c = 1;
+            }
+            else { // default b & c to 1
+                b = 1;
+                c = 1;
+            }
+
+            c1 = (a >>> 2) & 0x3f;
+            c2 = ((a << 4) & 0x30) | ((b >>> 4) & 0xf);
+            c3 = ((b << 2) & 0x3c) | ((c >>> 6) & 0x3);
+            c4 = c & 0x3f;
+            out.write(c1 + ' ');
+            out.write(c2 + ' ');
+            out.write(c3 + ' ');
+            out.write(c4 + ' ');
+        }
+        // Terminate with LF. (should it be CRLF or local line-terminator ?)
+        out.write('\n');
+    }
+
+    /**** begin TEST program *****
+    public static void main(String argv[]) throws Exception {
+        FileInputStream infile = new FileInputStream(argv[0]);
+        UUEncoderStream encoder = new UUEncoderStream(System.out);
+        int c;
+
+        while ((c = infile.read()) != -1)
+            encoder.write(c);
+        encoder.close();
+    }
+    **** end TEST program *****/
+}