| /* |
| * Copyright (c) 2002, 2010, 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.nio.cs.ext; |
| |
| import java.nio.ByteBuffer; |
| import java.nio.CharBuffer; |
| import java.nio.charset.Charset; |
| import java.nio.charset.CharsetDecoder; |
| import java.nio.charset.CharsetEncoder; |
| import java.nio.charset.CoderResult; |
| import sun.nio.cs.HistoricallyNamedCharset; |
| |
| public class SJIS |
| extends Charset |
| implements HistoricallyNamedCharset |
| { |
| |
| public SJIS() { |
| super("Shift_JIS", ExtendedCharsets.aliasesFor("Shift_JIS")); |
| } |
| |
| public String historicalName() { |
| return "SJIS"; |
| } |
| |
| public boolean contains(Charset cs) { |
| return ((cs.name().equals("US-ASCII")) |
| || (cs instanceof JIS_X_0201) |
| || (cs instanceof SJIS) |
| || (cs instanceof JIS_X_0208)); |
| } |
| |
| public CharsetDecoder newDecoder() { |
| return new Decoder(this); |
| } |
| |
| public CharsetEncoder newEncoder() { |
| |
| // Need to force the replacement byte to 0x3f |
| // because JIS_X_0208_Encoder defines its own |
| // alternative 2 byte substitution to permit it |
| // to exist as a self-standing Encoder |
| |
| byte[] replacementBytes = { (byte)0x3f }; |
| return new Encoder(this).replaceWith(replacementBytes); |
| } |
| |
| static class Decoder extends JIS_X_0208_Decoder |
| implements DelegatableDecoder { |
| |
| JIS_X_0201.Decoder jis0201; |
| |
| protected Decoder(Charset cs) { |
| super(cs); |
| jis0201 = new JIS_X_0201.Decoder(cs); |
| } |
| |
| protected char decodeSingle(int b) { |
| // If the high bits are all off, it's ASCII == Unicode |
| if ((b & 0xFF80) == 0) { |
| return (char)b; |
| } |
| return jis0201.decode(b); |
| } |
| |
| protected char decodeDouble(int c1, int c2) { |
| int adjust = c2 < 0x9F ? 1 : 0; |
| int rowOffset = c1 < 0xA0 ? 0x70 : 0xB0; |
| int cellOffset = (adjust == 1) ? (c2 > 0x7F ? 0x20 : 0x1F) : 0x7E; |
| int b1 = ((c1 - rowOffset) << 1) - adjust; |
| int b2 = c2 - cellOffset; |
| return super.decodeDouble(b1, b2); |
| } |
| |
| // Make some protected methods public for use by JISAutoDetect |
| public CoderResult decodeLoop(ByteBuffer src, CharBuffer dst) { |
| return super.decodeLoop(src, dst); |
| } |
| public void implReset() { |
| super.implReset(); |
| } |
| public CoderResult implFlush(CharBuffer out) { |
| return super.implFlush(out); |
| } |
| } |
| |
| static class Encoder extends JIS_X_0208_Encoder { |
| |
| private JIS_X_0201.Encoder jis0201; |
| |
| private static final short[] j0208Index1 = |
| JIS_X_0208_Encoder.getIndex1(); |
| private static final String[] j0208Index2 = |
| JIS_X_0208_Encoder.getIndex2(); |
| |
| protected Encoder(Charset cs) { |
| super(cs); |
| jis0201 = new JIS_X_0201.Encoder(cs); |
| } |
| |
| protected int encodeSingle(char inputChar) { |
| byte b; |
| |
| // \u0000 - \u007F map straight through |
| if ((inputChar & 0xFF80) == 0) |
| return (byte)inputChar; |
| |
| if ((b = jis0201.encode(inputChar)) == 0) |
| return -1; |
| else |
| return b; |
| } |
| |
| protected int encodeDouble(char ch) { |
| int offset = j0208Index1[ch >> 8] << 8; |
| int pos = j0208Index2[offset >> 12].charAt((offset & 0xfff) + (ch & 0xff)); |
| if (pos == 0) { |
| /* Zero value indicates this Unicode has no mapping to |
| * JIS0208. |
| * We bail here because the JIS -> SJIS algorithm produces |
| * bogus SJIS values for invalid JIS input. Zero should be |
| * the only invalid JIS value in our table. |
| */ |
| return 0; |
| } |
| /* |
| * This algorithm for converting from JIS to SJIS comes from |
| * Ken Lunde's "Understanding Japanese Information Processing", |
| * pg 163. |
| */ |
| int c1 = (pos >> 8) & 0xff; |
| int c2 = pos & 0xff; |
| int rowOffset = c1 < 0x5F ? 0x70 : 0xB0; |
| int cellOffset = (c1 % 2 == 1) ? (c2 > 0x5F ? 0x20 : 0x1F) : 0x7E; |
| return ((((c1 + 1 ) >> 1) + rowOffset) << 8) | (c2 + cellOffset); |
| } |
| } |
| } |