| /* |
| * Copyright (c) 2008, 2012, 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.CharsetEncoder; |
| import java.nio.charset.CharsetDecoder; |
| import java.nio.charset.CoderResult; |
| import java.security.AccessController; |
| import java.security.PrivilegedAction; |
| import java.util.Arrays; |
| import sun.nio.cs.CharsetMapping; |
| |
| /* |
| * 5 types of entry in SJIS_X_0213/Unicode mapping table |
| * |
| * (1)Single-Byte |
| * JIS_X_0213 does not define single-byte character itself, the |
| * JIS_X_0201 entries are added in for sjis implementation. |
| * |
| * (2)Double-Byte SJIS <-> BMP Unicode |
| * ex: 0x8140 U+3000 # IDEOGRAPHIC SPACE |
| * |
| * (3)Double-Byte SJIS <-> Supplementary |
| * ex: 0xFCF0 U+2A61A # <cjk> [2000] [Unicode3.1] |
| * |
| * (4)Double-Byte SJIS <-> Composite |
| * ex: 0x83F6 U+31F7+309A # [2000] |
| * |
| * (5)"Windows-only" special mapping entries |
| * are handled by MS932_0213. |
| */ |
| |
| public class SJIS_0213 extends Charset { |
| public SJIS_0213() { |
| super("x-SJIS_0213", ExtendedCharsets.aliasesFor("SJIS_0213")); |
| } |
| |
| public boolean contains(Charset cs) { |
| return ((cs.name().equals("US-ASCII")) |
| || (cs instanceof SJIS) |
| || (cs instanceof SJIS_0213)); |
| } |
| |
| public CharsetDecoder newDecoder() { |
| return new Decoder(this); |
| } |
| |
| public CharsetEncoder newEncoder() { |
| return new Encoder(this); |
| } |
| |
| static CharsetMapping mapping = AccessController.doPrivileged( |
| new PrivilegedAction<CharsetMapping>() { |
| public CharsetMapping run() { |
| return CharsetMapping.get(SJIS_0213.class.getResourceAsStream("sjis0213.dat")); |
| } |
| }); |
| |
| protected static class Decoder extends CharsetDecoder { |
| protected static final char UNMAPPABLE = CharsetMapping.UNMAPPABLE_DECODING; |
| |
| protected Decoder(Charset cs) { |
| super(cs, 0.5f, 1.0f); |
| } |
| |
| private CoderResult decodeArrayLoop(ByteBuffer src, CharBuffer dst) { |
| byte[] sa = src.array(); |
| int sp = src.arrayOffset() + src.position(); |
| int sl = src.arrayOffset() + src.limit(); |
| |
| char[] da = dst.array(); |
| int dp = dst.arrayOffset() + dst.position(); |
| int dl = dst.arrayOffset() + dst.limit(); |
| |
| try { |
| while (sp < sl) { |
| int b1 = sa[sp] & 0xff; |
| char c = decodeSingle(b1); |
| int inSize = 1, outSize = 1; |
| char[] cc = null; |
| if (c == UNMAPPABLE) { |
| if (sl - sp < 2) |
| return CoderResult.UNDERFLOW; |
| int b2 = sa[sp + 1] & 0xff; |
| c = decodeDouble(b1, b2); |
| inSize++; |
| if (c == UNMAPPABLE) { |
| cc = decodeDoubleEx(b1, b2); |
| if (cc == null) { |
| if (decodeSingle(b2) == UNMAPPABLE) |
| return CoderResult.unmappableForLength(2); |
| else |
| return CoderResult.unmappableForLength(1); |
| } |
| outSize++; |
| } |
| } |
| if (dl - dp < outSize) |
| return CoderResult.OVERFLOW; |
| if (outSize == 2) { |
| da[dp++] = cc[0]; |
| da[dp++] = cc[1]; |
| } else { |
| da[dp++] = c; |
| } |
| sp += inSize; |
| } |
| return CoderResult.UNDERFLOW; |
| } finally { |
| src.position(sp - src.arrayOffset()); |
| dst.position(dp - dst.arrayOffset()); |
| } |
| } |
| |
| private CoderResult decodeBufferLoop(ByteBuffer src, CharBuffer dst) { |
| int mark = src.position(); |
| try { |
| while (src.hasRemaining()) { |
| char[] cc = null; |
| int b1 = src.get() & 0xff; |
| char c = decodeSingle(b1); |
| int inSize = 1, outSize = 1; |
| if (c == UNMAPPABLE) { |
| if (src.remaining() < 1) |
| return CoderResult.UNDERFLOW; |
| int b2 = src.get() & 0xff; |
| inSize++; |
| c = decodeDouble(b1, b2); |
| if (c == UNMAPPABLE) { |
| cc = decodeDoubleEx(b1, b2); |
| if (cc == null) { |
| if (decodeSingle(b2) == UNMAPPABLE) |
| return CoderResult.unmappableForLength(2); |
| else |
| return CoderResult.unmappableForLength(1); |
| } |
| outSize++; |
| } |
| } |
| if (dst.remaining() < outSize) |
| return CoderResult.OVERFLOW; |
| if (outSize == 2) { |
| dst.put(cc[0]); |
| dst.put(cc[1]); |
| } else { |
| dst.put(c); |
| } |
| mark += inSize; |
| } |
| return CoderResult.UNDERFLOW; |
| } finally { |
| src.position(mark); |
| } |
| } |
| |
| protected CoderResult decodeLoop(ByteBuffer src, CharBuffer dst) { |
| if (src.hasArray() && dst.hasArray()) |
| return decodeArrayLoop(src, dst); |
| else |
| return decodeBufferLoop(src, dst); |
| } |
| |
| protected char decodeSingle(int b) { |
| return mapping.decodeSingle(b); |
| } |
| |
| protected char decodeDouble(int b1, int b2) { |
| return mapping.decodeDouble(b1, b2); |
| } |
| |
| private char[] cc = new char[2]; |
| private CharsetMapping.Entry comp = new CharsetMapping.Entry(); |
| protected char[] decodeDoubleEx(int b1, int b2) { |
| int db = (b1 << 8) | b2; |
| if (mapping.decodeSurrogate(db, cc) != null) |
| return cc; |
| comp.bs = db; |
| if (mapping.decodeComposite(comp, cc) != null) |
| return cc; |
| return null; |
| } |
| } |
| |
| protected static class Encoder extends CharsetEncoder { |
| protected static final int UNMAPPABLE = CharsetMapping.UNMAPPABLE_ENCODING; |
| protected static final int MAX_SINGLEBYTE = 0xff; |
| |
| protected Encoder(Charset cs) { |
| super(cs, 2.0f, 2.0f); |
| } |
| |
| public boolean canEncode(char c) { |
| return (encodeChar(c) != UNMAPPABLE); |
| } |
| |
| protected int encodeChar(char ch) { |
| return mapping.encodeChar(ch); |
| } |
| |
| protected int encodeSurrogate(char hi, char lo) { |
| return mapping.encodeSurrogate(hi, lo); |
| } |
| |
| private CharsetMapping.Entry comp = new CharsetMapping.Entry(); |
| protected int encodeComposite(char base, char cc) { |
| comp.cp = base; |
| comp.cp2 = cc; |
| return mapping.encodeComposite(comp); |
| } |
| |
| protected boolean isCompositeBase(char ch) { |
| comp.cp = ch; |
| return mapping.isCompositeBase(comp); |
| } |
| |
| // Unlike surrogate pair, the base character of a base+cc composite |
| // itself is a legal codepoint in 0213, if we simply return UNDERFLOW |
| // when a base candidate is the last input char in the CharBuffer, like |
| // what we do for the surrogte pair, encoding will fail if this base |
| // character is indeed the last character of the input char sequence. |
| // Keep this base candidate in "leftoverBase" so we can flush it out |
| // at the end of the encoding circle. |
| char leftoverBase = 0; |
| protected CoderResult encodeArrayLoop(CharBuffer src, ByteBuffer dst) { |
| char[] sa = src.array(); |
| int sp = src.arrayOffset() + src.position(); |
| int sl = src.arrayOffset() + src.limit(); |
| byte[] da = dst.array(); |
| int dp = dst.arrayOffset() + dst.position(); |
| int dl = dst.arrayOffset() + dst.limit(); |
| |
| try { |
| while (sp < sl) { |
| int db; |
| char c = sa[sp]; |
| if (leftoverBase != 0) { |
| boolean isComp = false; |
| db = encodeComposite(leftoverBase, c); |
| if (db == UNMAPPABLE) |
| db = encodeChar(leftoverBase); |
| else |
| isComp = true; |
| if (dl - dp < 2) |
| return CoderResult.OVERFLOW; |
| da[dp++] = (byte)(db >> 8); |
| da[dp++] = (byte)db; |
| leftoverBase = 0; |
| if (isComp) { |
| sp++; |
| continue; |
| } |
| } |
| if (isCompositeBase(c)) { |
| leftoverBase = c; |
| } else { |
| db = encodeChar(c); |
| if (db <= MAX_SINGLEBYTE) { // SingleByte |
| if (dl <= dp) |
| return CoderResult.OVERFLOW; |
| da[dp++] = (byte)db; |
| } else if (db != UNMAPPABLE) { // DoubleByte |
| if (dl - dp < 2) |
| return CoderResult.OVERFLOW; |
| da[dp++] = (byte)(db >> 8); |
| da[dp++] = (byte)db; |
| } else if (Character.isHighSurrogate(c)) { |
| if ((sp + 1) == sl) |
| return CoderResult.UNDERFLOW; |
| char c2 = sa[sp + 1]; |
| if (!Character.isLowSurrogate(c2)) |
| return CoderResult.malformedForLength(1); |
| db = encodeSurrogate(c, c2); |
| if (db == UNMAPPABLE) |
| return CoderResult.unmappableForLength(2); |
| if (dl - dp < 2) |
| return CoderResult.OVERFLOW; |
| da[dp++] = (byte)(db >> 8); |
| da[dp++] = (byte)db; |
| sp++; |
| } else if (Character.isLowSurrogate(c)) { |
| return CoderResult.malformedForLength(1); |
| } else { |
| return CoderResult.unmappableForLength(1); |
| } |
| } |
| sp++; |
| } |
| return CoderResult.UNDERFLOW; |
| } finally { |
| src.position(sp - src.arrayOffset()); |
| dst.position(dp - dst.arrayOffset()); |
| } |
| } |
| |
| protected CoderResult encodeBufferLoop(CharBuffer src, ByteBuffer dst) { |
| int mark = src.position(); |
| try { |
| while (src.hasRemaining()) { |
| int db; |
| char c = src.get(); |
| if (leftoverBase != 0) { |
| boolean isComp = false; |
| db = encodeComposite(leftoverBase, c); |
| if (db == UNMAPPABLE) |
| db = encodeChar(leftoverBase); |
| else |
| isComp = true; |
| if (dst.remaining() < 2) |
| return CoderResult.OVERFLOW; |
| dst.put((byte)(db >> 8)); |
| dst.put((byte)(db)); |
| leftoverBase = 0; |
| if (isComp) { |
| mark++; |
| continue; |
| } |
| } |
| if (isCompositeBase(c)) { |
| leftoverBase = c; |
| } else { |
| db = encodeChar(c); |
| if (db <= MAX_SINGLEBYTE) { // Single-byte |
| if (dst.remaining() < 1) |
| return CoderResult.OVERFLOW; |
| dst.put((byte)db); |
| } else if (db != UNMAPPABLE) { // DoubleByte |
| if (dst.remaining() < 2) |
| return CoderResult.OVERFLOW; |
| dst.put((byte)(db >> 8)); |
| dst.put((byte)(db)); |
| } else if (Character.isHighSurrogate(c)) { |
| if (!src.hasRemaining()) // Surrogates |
| return CoderResult.UNDERFLOW; |
| char c2 = src.get(); |
| if (!Character.isLowSurrogate(c2)) |
| return CoderResult.malformedForLength(1); |
| db = encodeSurrogate(c, c2); |
| if (db == UNMAPPABLE) |
| return CoderResult.unmappableForLength(2); |
| if (dst.remaining() < 2) |
| return CoderResult.OVERFLOW; |
| dst.put((byte)(db >> 8)); |
| dst.put((byte)(db)); |
| mark++; |
| } else if (Character.isLowSurrogate(c)) { |
| return CoderResult.malformedForLength(1); |
| } else { |
| return CoderResult.unmappableForLength(1); |
| } |
| } |
| mark++; |
| } |
| return CoderResult.UNDERFLOW; |
| } finally { |
| src.position(mark); |
| } |
| } |
| |
| protected CoderResult encodeLoop(CharBuffer src, ByteBuffer dst) { |
| if (src.hasArray() && dst.hasArray()) |
| return encodeArrayLoop(src, dst); |
| else |
| return encodeBufferLoop(src, dst); |
| } |
| |
| protected CoderResult implFlush(ByteBuffer dst) { |
| if (leftoverBase > 0) { |
| if (dst.remaining() < 2) |
| return CoderResult.OVERFLOW; |
| int db = encodeChar(leftoverBase); |
| dst.put((byte)(db >> 8)); |
| dst.put((byte)(db)); |
| leftoverBase = 0; |
| } |
| return CoderResult.UNDERFLOW; |
| } |
| |
| protected void implReset() { |
| leftoverBase = 0; |
| } |
| } |
| } |
