--- a/jdk/src/java.base/share/classes/sun/misc/UCDecoder.java Fri Dec 18 09:57:15 2015 -0800
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,233 +0,0 @@
-/*
- * Copyright (c) 1995, 2000, 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.ByteArrayOutputStream;
-import java.io.PushbackInputStream;
-import java.io.PrintStream;
-import java.io.IOException;
-
-/**
- * This class implements a robust character decoder. The decoder will
- * converted encoded text into binary data.
- *
- * 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>
- *
- * If an error is encountered during decoding this class throws a
- * CEFormatException. The specific detail messages are:
- *
- * <pre>
- * "UCDecoder: High byte parity error."
- * "UCDecoder: Low byte parity error."
- * "UCDecoder: Out of sequence line."
- * "UCDecoder: CRC check failed."
- * </pre>
- *
- * @author Chuck McManis
- * @see CharacterEncoder
- * @see UCEncoder
- */
-public class UCDecoder extends CharacterDecoder {
-
- /** This class 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();
-
- /**
- * Decode one atom - reads the characters from the input stream, decodes
- * them, and checks for valid parity.
- */
- protected void decodeAtom(PushbackInputStream inStream, OutputStream outStream, int l) throws IOException {
- int i, p1, p2, np1, np2;
- byte a = -1, b = -1, c = -1;
- byte high_byte, low_byte;
- byte tmp[] = new byte[3];
-
- i = inStream.read(tmp);
- if (i != 3) {
- throw new CEStreamExhausted();
- }
- for (i = 0; (i < 64) && ((a == -1) || (b == -1) || (c == -1)); i++) {
- if (tmp[0] == map_array[i]) {
- a = (byte) i;
- }
- if (tmp[1] == map_array[i]) {
- b = (byte) i;
- }
- if (tmp[2] == map_array[i]) {
- c = (byte) i;
- }
- }
- high_byte = (byte) (((a & 0x38) << 2) + (b & 0x1f));
- low_byte = (byte) (((a & 0x7) << 5) + (c & 0x1f));
- p1 = 0;
- p2 = 0;
- for (i = 1; i < 256; i = i * 2) {
- if ((high_byte & i) != 0)
- p1++;
- if ((low_byte & i) != 0)
- p2++;
- }
- np1 = (b & 32) / 32;
- np2 = (c & 32) / 32;
- if ((p1 & 1) != np1) {
- throw new CEFormatException("UCDecoder: High byte parity error.");
- }
- if ((p2 & 1) != np2) {
- throw new CEFormatException("UCDecoder: Low byte parity error.");
- }
- outStream.write(high_byte);
- crc.update(high_byte);
- if (l == 2) {
- outStream.write(low_byte);
- crc.update(low_byte);
- }
- }
-
- private ByteArrayOutputStream lineAndSeq = new ByteArrayOutputStream(2);
-
- /**
- * decodeBufferPrefix initializes the sequence number to zero.
- */
- protected void decodeBufferPrefix(PushbackInputStream inStream, OutputStream outStream) {
- sequence = 0;
- }
-
- /**
- * decodeLinePrefix reads the sequence number and the number of
- * encoded bytes from the line. If the sequence number is not the
- * previous sequence number + 1 then an exception is thrown.
- * UCE lines are line terminator immune, they all start with *
- * so the other thing this method does is scan for the next line
- * by looking for the * character.
- *
- * @exception CEFormatException out of sequence lines detected.
- */
- protected int decodeLinePrefix(PushbackInputStream inStream, OutputStream outStream) throws IOException {
- int i;
- int nLen, nSeq;
- byte xtmp[];
- int c;
-
- crc.value = 0;
- while (true) {
- c = inStream.read(tmp, 0, 1);
- if (c == -1) {
- throw new CEStreamExhausted();
- }
- if (tmp[0] == '*') {
- break;
- }
- }
- lineAndSeq.reset();
- decodeAtom(inStream, lineAndSeq, 2);
- xtmp = lineAndSeq.toByteArray();
- nLen = xtmp[0] & 0xff;
- nSeq = xtmp[1] & 0xff;
- if (nSeq != sequence) {
- throw new CEFormatException("UCDecoder: Out of sequence line.");
- }
- sequence = (sequence + 1) & 0xff;
- return (nLen);
- }
-
-
- /**
- * this method reads the CRC that is at the end of every line and
- * verifies that it matches the computed CRC.
- *
- * @exception CEFormatException if CRC check fails.
- */
- protected void decodeLineSuffix(PushbackInputStream inStream, OutputStream outStream) throws IOException {
- int i;
- int lineCRC = crc.value;
- int readCRC;
- byte tmp[];
-
- lineAndSeq.reset();
- decodeAtom(inStream, lineAndSeq, 2);
- tmp = lineAndSeq.toByteArray();
- readCRC = ((tmp[0] << 8) & 0xFF00) + (tmp[1] & 0xff);
- if (readCRC != lineCRC) {
- throw new CEFormatException("UCDecoder: CRC check failed.");
- }
- }
-}