--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/sun/nio/cs/ext/SJIS.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,164 @@
+/*
+ * 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.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;
+
+        short[] j0208Index1;
+        String[] j0208Index2;
+
+        protected Encoder(Charset cs) {
+            super(cs);
+            jis0201 = new JIS_X_0201.Encoder(cs);
+            j0208Index1 = super.getIndex1();
+            j0208Index2 = super.getIndex2();
+        }
+
+        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);
+        }
+    }
+}