FULL PRODUCT VERSION :
java version "1.5.0_06"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_06-b05)
Java HotSpot(TM) Client VM (build 1.5.0_06-b05, mixed mode, sharing)


ADDITIONAL OS VERSION INFORMATION :
Linux honolulu.ilog.fr 2.4.21-0.13mdk #1 Fri Mar 14 15:08:06 EST 2003 i686 unknown


A DESCRIPTION OF THE PROBLEM :
The encoder for Cp949 returns empty byte buffers or byte buffers containing
only a single null byte instead of throwing UnmappableCharacterException.
Likewise for Cp949C.


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
javac niobug6.java
java niobug6


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
No output.

ACTUAL -
Charset Cp949: 54275 errors
Charset Cp949C: 54275 errors


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.io.*;
import java.nio.*;
import java.nio.charset.*;

public class niobug6 {
  public static void main (String[] args) throws CharacterCodingException {
    String[] charsets = { "Cp949", "Cp949C" };
    for (int n = 0; n < charsets.length; n++) {
      String charset = charsets[n];
      CharsetEncoder converter = Charset.forName(charset).newEncoder();
      converter = converter.onMalformedInput(CodingErrorAction.REPORT);
      converter = converter.onUnmappableCharacter(CodingErrorAction.REPORT);
      int errors = 0;
      for (int i = 1; i < 0x110000; i++) {
        char[] in =
          (i < 0x10000
           ? new char[] { (char)i }
           : new char[] { (char)(0xd800 + ((i - 0x10000) >> 10)),
                          (char)(0xdc00 + ((i - 0x10000) & 0x3ff)) });
        try {
          ByteBuffer out = converter.encode(CharBuffer.wrap(in));
          if (out.remaining() == 0
              || (out.remaining() == 1 && out.get(0) == 0x00))
            errors++;
        } catch (CharacterCodingException e) {
        }
      }
      if (errors > 0)
        System.err.println("Charset "+charset+": "+errors+" errors");
    }
  }
}

---------- END SOURCE ----------