jdk/src/share/classes/sun/io/ByteToCharCp834.java
changeset 2 90ce3da70b43
child 2921 d9d491a5a169
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/sun/io/ByteToCharCp834.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,154 @@
+/*
+ * Copyright 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.io;
+
+import sun.nio.cs.ext.IBM933;
+
+public class ByteToCharCp834 extends ByteToCharDBCS_ONLY_EBCDIC {
+    public String getCharacterEncoding() {
+        return "Cp834";
+    }
+
+    public ByteToCharCp834() {
+        super();
+        super.mask1 = 0xFFF0;
+        super.mask2 = 0x000F;
+        super.shift = 4;
+        super.index1 = IBM933.getDecoderIndex1();
+        super.index2 = IBM933.getDecoderIndex2();
+    }
+}
+
+abstract class ByteToCharDBCS_ONLY_EBCDIC extends ByteToCharConverter {
+    private boolean savedBytePresent;
+    private byte savedByte;
+
+    protected short index1[];
+    protected String index2;
+    protected int   mask1;
+    protected int   mask2;
+    protected int   shift;
+
+    public ByteToCharDBCS_ONLY_EBCDIC() {
+       super();
+       savedBytePresent = false;
+    }
+
+    public int flush(char [] output, int outStart, int outEnd)
+       throws MalformedInputException
+    {
+       if (savedBytePresent) {
+           reset();
+           badInputLength = 0;
+           throw new MalformedInputException();
+       }
+       reset();
+       return 0;
+    }
+
+
+    /**
+     * Character conversion
+     */
+    public int convert(byte[] input, int inOff, int inEnd,
+                       char[] output, int outOff, int outEnd)
+        throws UnknownCharacterException, MalformedInputException,
+               ConversionBufferFullException
+    {
+       int  inputSize;
+       char outputChar = '\uFFFD';
+
+       charOff = outOff;
+       byteOff = inOff;
+
+       while(byteOff < inEnd) {
+          int byte1, byte2;
+          int v;
+
+          if (!savedBytePresent) {
+              byte1 = input[byteOff] & 0xff;
+              inputSize = 1;
+          } else {
+              byte1 = savedByte;
+              savedBytePresent = false;
+              inputSize = 0;
+          }
+
+          // valid range of 1st bytes
+          if (byte1 < 0x40 || byte1 > 0xfe) {
+              badInputLength = 1;
+              throw new MalformedInputException();
+          }
+
+          if (byteOff + inputSize >= inEnd) {
+              // We have been split in the middle if a character
+              // save the first byte for next time around
+              savedByte = (byte)byte1;
+              savedBytePresent = true;
+              byteOff += inputSize;
+              break;
+          }
+
+          byte2 = input[byteOff+inputSize] & 0xff;
+          inputSize++;
+
+          // validate the pair of bytes
+          if ((byte1 != 0x40 || byte2 != 0x40) &&
+              (byte2 < 0x41 || byte2 > 0xfe)) {
+              badInputLength = 2;
+              throw new MalformedInputException();
+          }
+
+          // Lookup in the two level index
+          v = byte1 * 256 + byte2;
+          outputChar = index2.charAt(index1[((v & mask1) >> shift)]
+                                     + (v & mask2));
+
+          if (outputChar == '\uFFFD') {
+              if (subMode)
+                  outputChar = subChars[0];
+              else {
+                  badInputLength = inputSize;
+                  throw new UnknownCharacterException();
+              }
+          }
+
+          if (charOff >= outEnd)
+              throw new ConversionBufferFullException();
+
+          output[charOff++] = outputChar;
+          byteOff += inputSize;
+       }
+       return charOff - outOff;
+    }
+
+    /**
+     *  Resets the converter.
+     */
+    public void reset() {
+        charOff = byteOff = 0;
+        savedBytePresent = false;
+    }
+}