--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/sun/nio/cs/ext/ISO2022_CN_GB.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,91 @@
+/*
+ * 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.charset.Charset;
+import java.nio.ByteBuffer;
+import java.nio.CharBuffer;
+import java.nio.charset.CharsetDecoder;
+import java.nio.charset.CharsetEncoder;
+import java.nio.charset.CoderResult;
+import sun.nio.cs.HistoricallyNamedCharset;
+
+public class ISO2022_CN_GB extends ISO2022 implements HistoricallyNamedCharset
+{
+    public ISO2022_CN_GB() {
+        super("x-ISO-2022-CN-GB",
+               ExtendedCharsets.aliasesFor("x-ISO-2022-CN-GB"));
+    }
+
+    public boolean contains(Charset cs) {
+        // overlapping repertoire of EUC_CN, GB2312
+        return ((cs instanceof EUC_CN) ||
+                (cs.name().equals("US-ASCII")) ||
+                (cs instanceof ISO2022_CN_GB));
+    }
+
+    public String historicalName() {
+        return "ISO2022CN_GB";
+    }
+
+    public CharsetDecoder newDecoder() {
+        return new ISO2022_CN.Decoder(this);
+    }
+
+    public CharsetEncoder newEncoder() {
+        return new Encoder(this);
+    }
+
+    private static class Encoder extends ISO2022.Encoder {
+
+        public Encoder(Charset cs)
+        {
+            super(cs);
+            SODesig = "$)A";
+
+            try {
+                Charset cset = Charset.forName("EUC_CN"); // GB2312
+                ISOEncoder = cset.newEncoder();
+            } catch (Exception e) { }
+        }
+
+        /*
+         * Since ISO2022-CN-GB possesses a CharsetEncoder
+         * without the corresponding CharsetDecoder half the
+         * default replacement check needs to be overridden
+         * since the parent class version attempts to
+         * decode 0x3f (?).
+         */
+
+        public boolean isLegalReplacement(byte[] repl) {
+            // 0x3f is OK as the replacement byte
+            return (repl.length == 1 && repl[0] == (byte) 0x3f);
+        }
+    }
+}