--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/sun/nio/cs/ext/ISO2022_CN.java Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,404 @@
+/*
+ * Copyright 2003-2006 Sun Microsystems, Inc. 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. Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.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 java.nio.charset.CharacterCodingException;
+import sun.nio.cs.HistoricallyNamedCharset;
+import sun.nio.cs.US_ASCII;
+
+public class ISO2022_CN
+ extends Charset
+ implements HistoricallyNamedCharset
+{
+ private static final byte ISO_ESC = 0x1b;
+ private static final byte ISO_SI = 0x0f;
+ private static final byte ISO_SO = 0x0e;
+ private static final byte ISO_SS2_7 = 0x4e;
+ private static final byte ISO_SS3_7 = 0x4f;
+ private static final byte MSB = (byte)0x80;
+ private static final char REPLACE_CHAR = '\uFFFD';
+
+ private static final byte SODesigGB = 0;
+ private static final byte SODesigCNS = 1;
+
+ public ISO2022_CN() {
+ super("ISO-2022-CN", ExtendedCharsets.aliasesFor("ISO-2022-CN"));
+ }
+
+ public String historicalName() {
+ return "ISO2022CN";
+ }
+
+ public boolean contains(Charset cs) {
+ return ((cs instanceof EUC_CN) // GB2312-80 repertoire
+ || (cs instanceof US_ASCII)
+ || (cs instanceof EUC_TW) // CNS11643 repertoire
+ || (cs instanceof ISO2022_CN));
+ }
+
+ public CharsetDecoder newDecoder() {
+ return new Decoder(this);
+ }
+
+ public CharsetEncoder newEncoder() {
+ throw new UnsupportedOperationException();
+ }
+
+ public boolean canEncode() {
+ return false;
+ }
+
+ static class Decoder extends CharsetDecoder {
+ private boolean shiftOut;
+ private byte currentSODesig;
+
+ private static final Charset gb2312 = new EUC_CN();
+ private static final Charset cns = new EUC_TW();
+ private final EUC_CN.Decoder gb2312Decoder;
+ private final EUC_TW.Decoder cnsDecoder;
+
+ Decoder(Charset cs) {
+ super(cs, 1.0f, 1.0f);
+ shiftOut = false;
+ currentSODesig = SODesigGB;
+ gb2312Decoder = (EUC_CN.Decoder)gb2312.newDecoder();
+ cnsDecoder = (EUC_TW.Decoder)cns.newDecoder();
+ }
+
+ protected void implReset() {
+ shiftOut= false;
+ currentSODesig = SODesigGB;
+ }
+
+ private char cnsDecode(byte byte1, byte byte2, byte SS) {
+ byte1 |= MSB;
+ byte2 |= MSB;
+ if (SS == ISO_SS2_7) {
+ return cnsDecoder.convToUnicode(byte1, byte2,
+ cnsDecoder.unicodeCNS2);
+
+ } else { //SS == ISO_SS3_7
+ char[] outSurr = cnsDecoder.convToSurrogate(byte1, byte2,
+ cnsDecoder.unicodeCNS3);
+ if (outSurr == null || outSurr[0] != '\u0000')
+ return REPLACE_CHAR;
+ return outSurr[1];
+ }
+ }
+
+ private char SODecode(byte byte1, byte byte2, byte SOD) {
+ byte1 |= MSB;
+ byte2 |= MSB;
+ if (SOD == SODesigGB) {
+ return gb2312Decoder.decodeDouble(byte1 & 0xff,
+ byte2 & 0xff);
+ } else { // SOD == SODesigCNS
+ return cnsDecoder.convToUnicode(byte1,
+ byte2,
+ cnsDecoder.unicodeCNS1);
+ }
+ }
+
+ private CoderResult decodeBufferLoop(ByteBuffer src,
+ CharBuffer dst)
+ {
+ int mark = src.position();
+ byte b1 = 0, b2 = 0, b3 = 0, b4 = 0;
+ int inputSize = 0;
+ char c = REPLACE_CHAR;
+ try {
+ while (src.hasRemaining()) {
+ b1 = src.get();
+ inputSize = 1;
+
+ while (b1 == ISO_ESC ||
+ b1 == ISO_SO ||
+ b1 == ISO_SI) {
+ if (b1 == ISO_ESC) { // ESC
+ currentSODesig = SODesigGB;
+
+ if (src.remaining() < 1)
+ return CoderResult.UNDERFLOW;
+
+ b2 = src.get();
+ inputSize++;
+
+ if ((b2 & (byte)0x80) != 0)
+ return CoderResult.malformedForLength(inputSize);
+
+ if (b2 == (byte)0x24) {
+ if (src.remaining() < 1)
+ return CoderResult.UNDERFLOW;
+
+ b3 = src.get();
+ inputSize++;
+
+ if ((b3 & (byte)0x80) != 0)
+ return CoderResult.malformedForLength(inputSize);
+ if (b3 == 'A'){ // "$A"
+ currentSODesig = SODesigGB;
+ } else if (b3 == ')') {
+ if (src.remaining() < 1)
+ return CoderResult.UNDERFLOW;
+ b4 = src.get();
+ inputSize++;
+ if (b4 == 'A'){ // "$)A"
+ currentSODesig = SODesigGB;
+ } else if (b4 == 'G'){ // "$)G"
+ currentSODesig = SODesigCNS;
+ } else {
+ return CoderResult.malformedForLength(inputSize);
+ }
+ } else if (b3 == '*') {
+ if (src.remaining() < 1)
+ return CoderResult.UNDERFLOW;
+ b4 = src.get();
+ inputSize++;
+ if (b4 != 'H') { // "$*H"
+ //SS2Desig -> CNS-P1
+ return CoderResult.malformedForLength(inputSize);
+ }
+ } else if (b3 == '+') {
+ if (src.remaining() < 1)
+ return CoderResult.UNDERFLOW;
+ b4 = src.get();
+ inputSize++;
+ if (b4 != 'I'){ // "$+I"
+ //SS3Desig -> CNS-P2.
+ return CoderResult.malformedForLength(inputSize);
+ }
+ } else {
+ return CoderResult.malformedForLength(inputSize);
+ }
+ } else if (b2 == ISO_SS2_7 || b2 == ISO_SS3_7) {
+ if (src.remaining() < 2)
+ return CoderResult.UNDERFLOW;
+ b3 = src.get();
+ b4 = src.get();
+ inputSize += 2;
+ if (dst.remaining() < 1)
+ return CoderResult.OVERFLOW;
+ //SS2->CNS-P2, SS3->CNS-P3
+ c = cnsDecode(b3, b4, b2);
+ if (c == REPLACE_CHAR)
+ return CoderResult.unmappableForLength(inputSize);
+ dst.put(c);
+ } else {
+ return CoderResult.malformedForLength(inputSize);
+ }
+ } else if (b1 == ISO_SO) {
+ shiftOut = true;
+ } else if (b1 == ISO_SI) { // shift back in
+ shiftOut = false;
+ }
+ mark += inputSize;
+ if (src.remaining() < 1)
+ return CoderResult.UNDERFLOW;
+ b1 = src.get();
+ inputSize = 1;
+ }
+
+ if (dst.remaining() < 1)
+ return CoderResult.OVERFLOW;
+
+ if (!shiftOut) {
+ dst.put((char)(b1 & 0xff)); //clear the upper byte
+ mark += inputSize;
+ } else {
+ if (src.remaining() < 1)
+ return CoderResult.UNDERFLOW;
+ b2 = src.get();
+ inputSize++;
+ c = SODecode(b1, b2, currentSODesig);
+ if (c == REPLACE_CHAR)
+ return CoderResult.unmappableForLength(inputSize);
+ dst.put(c);
+ mark += inputSize;
+ }
+ }
+ return CoderResult.UNDERFLOW;
+ } finally {
+ src.position(mark);
+ }
+ }
+
+ private CoderResult decodeArrayLoop(ByteBuffer src,
+ CharBuffer dst)
+ {
+ int inputSize = 0;
+ byte b1 = 0, b2 = 0, b3 = 0, b4 = 0;
+ char c = REPLACE_CHAR;
+
+ byte[] sa = src.array();
+ int sp = src.arrayOffset() + src.position();
+ int sl = src.arrayOffset() + src.limit();
+ assert (sp <= sl);
+ sp = (sp <= sl ? sp : sl);
+
+ char[] da = dst.array();
+ int dp = dst.arrayOffset() + dst.position();
+ int dl = dst.arrayOffset() + dst.limit();
+ assert (dp <= dl);
+ dp = (dp <= dl ? dp : dl);
+
+ try {
+ while (sp < sl) {
+ b1 = sa[sp];
+ inputSize = 1;
+
+ while (b1 == ISO_ESC || b1 == ISO_SO || b1 == ISO_SI) {
+ if (b1 == ISO_ESC) { // ESC
+ currentSODesig = SODesigGB;
+
+ if (sp + 2 > sl)
+ return CoderResult.UNDERFLOW;
+
+ b2 = sa[sp + 1];
+ inputSize++;
+
+ if ((b2 & (byte)0x80) != 0)
+ return CoderResult.malformedForLength(inputSize);
+ if (b2 == (byte)0x24) {
+ if (sp + 3 > sl)
+ return CoderResult.UNDERFLOW;
+
+ b3 = sa[sp + 2];
+ inputSize++;
+
+ if ((b3 & (byte)0x80) != 0)
+ return CoderResult.malformedForLength(inputSize);
+ if (b3 == 'A'){ // "$A"
+ /* <ESC>$A is not a legal designator sequence for
+ ISO2022_CN, it is listed as an escape sequence
+ for GB2312 in ISO2022-JP-2. Keep it here just for
+ the sake of "compatibility".
+ */
+ currentSODesig = SODesigGB;
+ } else if (b3 == ')') {
+ if (sp + 4 > sl)
+ return CoderResult.UNDERFLOW;
+ b4 = sa[sp + 3];
+ inputSize++;
+
+ if (b4 == 'A'){ // "$)A"
+ currentSODesig = SODesigGB;
+ } else if (b4 == 'G'){ // "$)G"
+ currentSODesig = SODesigCNS;
+ } else {
+ return CoderResult.malformedForLength(inputSize);
+ }
+ } else if (b3 == '*') {
+ if (sp + 4 > sl)
+ return CoderResult.UNDERFLOW;
+ b4 = sa[sp + 3];
+ inputSize++;
+ if (b4 != 'H'){ // "$*H"
+ return CoderResult.malformedForLength(inputSize);
+ }
+ } else if (b3 == '+') {
+ if (sp + 4 > sl)
+ return CoderResult.UNDERFLOW;
+ b4 = sa[sp + 3];
+ inputSize++;
+ if (b4 != 'I'){ // "$+I"
+ return CoderResult.malformedForLength(inputSize);
+ }
+ } else {
+ return CoderResult.malformedForLength(inputSize);
+ }
+ } else if (b2 == ISO_SS2_7 || b2 == ISO_SS3_7) {
+ if (sp + 4 > sl) {
+ return CoderResult.UNDERFLOW;
+ }
+ b3 = sa[sp + 2];
+ b4 = sa[sp + 3];
+ if (dl - dp < 1) {
+ return CoderResult.OVERFLOW;
+ }
+ inputSize += 2;
+ c = cnsDecode(b3, b4, b2);
+ if (c == REPLACE_CHAR)
+ return CoderResult.unmappableForLength(inputSize);
+ da[dp++] = c;
+ } else {
+ return CoderResult.malformedForLength(inputSize);
+ }
+ } else if (b1 == ISO_SO) {
+ shiftOut = true;
+ } else if (b1 == ISO_SI) { // shift back in
+ shiftOut = false;
+ }
+ sp += inputSize;
+ if (sp + 1 > sl)
+ return CoderResult.UNDERFLOW;
+ b1 = sa[sp];
+ inputSize = 1;
+ }
+
+ if (dl - dp < 1) {
+ return CoderResult.OVERFLOW;
+ }
+
+ if (!shiftOut) {
+ da[dp++] = (char)(b1 & 0xff); //clear the upper byte
+ } else {
+ if (sp + 2 > sl)
+ return CoderResult.UNDERFLOW;
+ b2 = sa[sp + 1];
+ inputSize++;
+ c = SODecode(b1, b2, currentSODesig);
+ if (c == REPLACE_CHAR)
+ return CoderResult.unmappableForLength(inputSize);
+ da[dp++] = c;
+ }
+ sp += inputSize;
+ }
+ return CoderResult.UNDERFLOW;
+ } finally {
+ src.position(sp - src.arrayOffset());
+ dst.position(dp - dst.arrayOffset());
+ }
+ }
+
+ protected CoderResult decodeLoop(ByteBuffer src,
+ CharBuffer dst)
+ {
+ if (src.hasArray() && dst.hasArray())
+ return decodeArrayLoop(src, dst);
+ else
+ return decodeBufferLoop(src, dst);
+ }
+ }
+}