--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/sun/nio/cs/ext/DoubleByteEncoder.java Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,241 @@
+/*
+ * Copyright 2002-2006 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.CharsetEncoder;
+import java.nio.charset.CoderResult;
+import sun.nio.cs.Surrogate;
+
+public abstract class DoubleByteEncoder
+ extends CharsetEncoder
+{
+
+ private short index1[];
+ private String index2[];
+
+ private final Surrogate.Parser sgp = new Surrogate.Parser();
+
+ protected DoubleByteEncoder(Charset cs,
+ short[] index1, String[] index2)
+ {
+ super(cs, 2.0f, 2.0f);
+ this.index1 = index1;
+ this.index2 = index2;
+ }
+
+ protected DoubleByteEncoder(Charset cs,
+ short[] index1, String[] index2,
+ float avg, float max)
+ {
+ super(cs, avg, max);
+ this.index1 = index1;
+ this.index2 = index2;
+ }
+
+ protected DoubleByteEncoder(Charset cs,
+ short[] index1, String[] index2, byte[] repl)
+ {
+ super(cs, 2.0f, 2.0f, repl);
+ this.index1 = index1;
+ this.index2 = index2;
+ }
+
+
+ protected DoubleByteEncoder(Charset cs,
+ short[] index1, String[] index2,
+ byte[] repl, float avg, float max)
+ {
+ super(cs, avg, max,repl);
+ this.index1 = index1;
+ this.index2 = index2;
+ }
+
+ public boolean canEncode(char c) {
+ return (encodeSingle(c) != -1 ||
+ encodeDouble(c) != 0);
+ }
+
+ private 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) {
+ char c = sa[sp];
+ if (Surrogate.is(c)) {
+ if (sgp.parse(c, sa, sp, sl) < 0)
+ return sgp.error();
+ if (sl - sp < 2)
+ return CoderResult.UNDERFLOW;
+ char c2 = sa[sp + 1];
+
+ byte[] outputBytes = new byte[2];
+ outputBytes = encodeSurrogate(c, c2);
+
+ if (outputBytes == null) {
+ return sgp.unmappableResult();
+ }
+ else {
+ if (dl - dp < 2)
+ return CoderResult.OVERFLOW;
+ da[dp++] = outputBytes[0];
+ da[dp++] = outputBytes[1];
+ sp += 2;
+ continue;
+ }
+ }
+ if (c >= '\uFFFE')
+ return CoderResult.unmappableForLength(1);
+
+ int b = encodeSingle(c);
+ if (b != -1) { // Single Byte
+ if (dl - dp < 1)
+ return CoderResult.OVERFLOW;
+ da[dp++] = (byte)b;
+ sp++;
+ continue;
+ }
+
+ int ncode = encodeDouble(c);
+ if (ncode != 0 && c != '\u0000' ) {
+ if (dl - dp < 2)
+ return CoderResult.OVERFLOW;
+ da[dp++] = (byte) ((ncode & 0xff00) >> 8);
+ da[dp++] = (byte) (ncode & 0xff);
+ sp++;
+ continue;
+ }
+ return CoderResult.unmappableForLength(1);
+ }
+ return CoderResult.UNDERFLOW;
+ } finally {
+ src.position(sp - src.arrayOffset());
+ dst.position(dp - dst.arrayOffset());
+ }
+ }
+
+ private CoderResult encodeBufferLoop(CharBuffer src, ByteBuffer dst) {
+ int mark = src.position();
+
+ try {
+ while (src.hasRemaining()) {
+ char c = src.get();
+ if (Surrogate.is(c)) {
+ int surr;
+ if ((surr = sgp.parse(c, src)) < 0)
+ return sgp.error();
+ char c2 = Surrogate.low(surr);
+ byte[] outputBytes = new byte[2];
+ outputBytes = encodeSurrogate(c, c2);
+
+ if (outputBytes == null) {
+ return sgp.unmappableResult();
+ } else {
+ if (dst.remaining() < 2)
+ return CoderResult.OVERFLOW;
+ mark += 2;
+ dst.put(outputBytes[0]);
+ dst.put(outputBytes[1]);
+ continue;
+ }
+ }
+ if (c >= '\uFFFE')
+ return CoderResult.unmappableForLength(1);
+ int b = encodeSingle(c);
+
+ if (b != -1) { // Single-byte character
+ if (dst.remaining() < 1)
+ return CoderResult.OVERFLOW;
+ mark++;
+ dst.put((byte)b);
+ continue;
+ }
+ // Double Byte character
+
+ int ncode = encodeDouble(c);
+ if (ncode != 0 && c != '\u0000') {
+ if (dst.remaining() < 2)
+ return CoderResult.OVERFLOW;
+ mark++;
+ dst.put((byte) ((ncode & 0xff00) >> 8));
+ dst.put((byte) ncode);
+ continue;
+ }
+ return CoderResult.unmappableForLength(1);
+ }
+
+ return CoderResult.UNDERFLOW;
+ } finally {
+ src.position(mark);
+ }
+ }
+
+ protected CoderResult encodeLoop(CharBuffer src, ByteBuffer dst) {
+ if (true && src.hasArray() && dst.hasArray())
+ return encodeArrayLoop(src, dst);
+ else
+ return encodeBufferLoop(src, dst);
+ }
+
+ /*
+ * Can be changed by subclass
+ */
+ protected int encodeDouble(char ch) {
+ int offset = index1[((ch & 0xff00) >> 8 )] << 8;
+ return index2[offset >> 12].charAt((offset & 0xfff) + (ch & 0xff));
+ }
+
+ /*
+ * Can be changed by subclass
+ */
+ protected int encodeSingle(char inputChar) {
+ if (inputChar < 0x80)
+ return (byte)inputChar;
+ else
+ return -1;
+ }
+
+ /**
+ * Protected method which should be overridden by concrete DBCS
+ * CharsetEncoder classes which included supplementary characters
+ * within their mapping coverage.
+ * null return value indicates surrogate values could not be
+ * handled or encoded.
+ */
+ protected byte[] encodeSurrogate(char highSurrogate, char lowSurrogate) {
+ return null;
+ }
+}