--- a/jdk/src/java.base/share/classes/sun/misc/UCEncoder.java Fri Dec 18 09:57:15 2015 -0800
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,178 +0,0 @@
-/*
- * Copyright (c) 1995, 1997, 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.
- */
-package sun.misc;
-
-import java.io.OutputStream;
-import java.io.InputStream;
-import java.io.PrintStream;
-import java.io.IOException;
-
-/**
- * This class implements a robust character encoder. The encoder is designed
- * to convert binary data into printable characters. The characters are
- * assumed to exist but they are not assumed to be ASCII, the complete set
- * is 0-9, A-Z, a-z, "(", and ")".
- *
- * The basic encoding unit is a 3 character atom. It encodes two bytes
- * of data. Bytes are encoded into a 64 character set, the characters
- * were chosen specifically because they appear in all codesets.
- * We don't care what their numerical equivalent is because
- * we use a character array to map them. This is like UUencoding
- * with the dependency on ASCII removed.
- *
- * The three chars that make up an atom are encoded as follows:
- * <pre>
- * 00xxxyyy 00axxxxx 00byyyyy
- * 00 = leading zeros, all values are 0 - 63
- * xxxyyy - Top 3 bits of X, Top 3 bits of Y
- * axxxxx - a = X parity bit, xxxxx lower 5 bits of X
- * byyyyy - b = Y parity bit, yyyyy lower 5 bits of Y
- * </pre>
- *
- * The atoms are arranged into lines suitable for inclusion into an
- * email message or text file. The number of bytes that are encoded
- * per line is 48 which keeps the total line length under 80 chars)
- *
- * Each line has the form(
- * <pre>
- * *(LLSS)(DDDD)(DDDD)(DDDD)...(CRC)
- * Where each (xxx) represents a three character atom.
- * (LLSS) - 8 bit length (high byte), and sequence number
- * modulo 256;
- * (DDDD) - Data byte atoms, if length is odd, last data
- * atom has (DD00) (high byte data, low byte 0)
- * (CRC) - 16 bit CRC for the line, includes length,
- * sequence, and all data bytes. If there is a
- * zero pad byte (odd length) it is _NOT_
- * included in the CRC.
- * </pre>
- *
- * @author Chuck McManis
- * @see CharacterEncoder
- * @see UCDecoder
- */
-public class UCEncoder extends CharacterEncoder {
-
- /** this clase encodes two bytes per atom */
- protected int bytesPerAtom() {
- return (2);
- }
-
- /** this class encodes 48 bytes per line */
- protected int bytesPerLine() {
- return (48);
- }
-
- /* this is the UCE mapping of 0-63 to characters .. */
- private static final byte map_array[] = {
- // 0 1 2 3 4 5 6 7
- (byte)'0',(byte)'1',(byte)'2',(byte)'3',(byte)'4',(byte)'5',(byte)'6',(byte)'7', // 0
- (byte)'8',(byte)'9',(byte)'A',(byte)'B',(byte)'C',(byte)'D',(byte)'E',(byte)'F', // 1
- (byte)'G',(byte)'H',(byte)'I',(byte)'J',(byte)'K',(byte)'L',(byte)'M',(byte)'N', // 2
- (byte)'O',(byte)'P',(byte)'Q',(byte)'R',(byte)'S',(byte)'T',(byte)'U',(byte)'V', // 3
- (byte)'W',(byte)'X',(byte)'Y',(byte)'Z',(byte)'a',(byte)'b',(byte)'c',(byte)'d', // 4
- (byte)'e',(byte)'f',(byte)'g',(byte)'h',(byte)'i',(byte)'j',(byte)'k',(byte)'l', // 5
- (byte)'m',(byte)'n',(byte)'o',(byte)'p',(byte)'q',(byte)'r',(byte)'s',(byte)'t', // 6
- (byte)'u',(byte)'v',(byte)'w',(byte)'x',(byte)'y',(byte)'z',(byte)'(',(byte)')' // 7
- };
-
- private int sequence;
- private byte tmp[] = new byte[2];
- private CRC16 crc = new CRC16();
-
- /**
- * encodeAtom - take two bytes and encode them into the correct
- * three characters. If only one byte is to be encoded, the other
- * must be zero. The padding byte is not included in the CRC computation.
- */
- protected void encodeAtom(OutputStream outStream, byte data[], int offset, int len) throws IOException
- {
- int i;
- int p1, p2; // parity bits
- byte a, b;
-
- a = data[offset];
- if (len == 2) {
- b = data[offset+1];
- } else {
- b = 0;
- }
- crc.update(a);
- if (len == 2) {
- crc.update(b);
- }
- outStream.write(map_array[((a >>> 2) & 0x38) + ((b >>> 5) & 0x7)]);
- p1 = 0; p2 = 0;
- for (i = 1; i < 256; i = i * 2) {
- if ((a & i) != 0) {
- p1++;
- }
- if ((b & i) != 0) {
- p2++;
- }
- }
- p1 = (p1 & 1) * 32;
- p2 = (p2 & 1) * 32;
- outStream.write(map_array[(a & 31) + p1]);
- outStream.write(map_array[(b & 31) + p2]);
- return;
- }
-
- /**
- * Each UCE encoded line starts with a prefix of '*[XXX]', where
- * the sequence number and the length are encoded in the first
- * atom.
- */
- protected void encodeLinePrefix(OutputStream outStream, int length) throws IOException {
- outStream.write('*');
- crc.value = 0;
- tmp[0] = (byte) length;
- tmp[1] = (byte) sequence;
- sequence = (sequence + 1) & 0xff;
- encodeAtom(outStream, tmp, 0, 2);
- }
-
-
- /**
- * each UCE encoded line ends with YYY and encoded version of the
- * 16 bit checksum. The most significant byte of the check sum
- * is always encoded FIRST.
- */
- protected void encodeLineSuffix(OutputStream outStream) throws IOException {
- tmp[0] = (byte) ((crc.value >>> 8) & 0xff);
- tmp[1] = (byte) (crc.value & 0xff);
- encodeAtom(outStream, tmp, 0, 2);
- super.pStream.println();
- }
-
- /**
- * The buffer prefix code is used to initialize the sequence number
- * to zero.
- */
- protected void encodeBufferPrefix(OutputStream a) throws IOException {
- sequence = 0;
- super.encodeBufferPrefix(a);
- }
-}