The attached testcase shows the following codepoints failed in roundtrip
conversion in EUC_TW.

 encode(4ea0)=[a7,a8,a7,c2]: bb.pos=2, decode(a7,a8,a7,c2)=fffd, cb.pos=1
 encode(4ea1)=[c4,c1,a7,c2]: bb.pos=2, decode(c4,c1,a7,c2)=fffd, cb.pos=1
 encode(4ea2)=[c4,ed,a7,c2]: bb.pos=2, decode(c4,ed,a7,c2)=fffd, cb.pos=1
 encode(4ea3)=[8e,a3,a1,c7]: bb.pos=4, decode(8e,a3,a1,c7)=6495, cb.pos=1
 encode(51ab)=[a7,af,c6,dc]: bb.pos=2, decode(a7,af,c6,dc)=fffd, cb.pos=1
 encode(51ac)=[c5,f6,c6,dc]: bb.pos=2, decode(c5,f6,c6,dc)=fffd, cb.pos=1
 encode(51ad)=[8e,a4,a1,de]: bb.pos=4, decode(8e,a4,a1,de)=971c, cb.pos=1
 encode(52f9)=[a7,b4,e5,ba]: bb.pos=2, decode(a7,b4,e5,ba)=fffd, cb.pos=1
 encode(52fa)=[c4,c4,e5,ba]: bb.pos=2, decode(c4,c4,e5,ba)=fffd, cb.pos=1
 encode(52fb)=[c5,a4,e5,ba]: bb.pos=2, decode(c5,a4,e5,ba)=4e03, cb.pos=1
Total roundtrip failed 10


import java.nio.*;
import java.nio.charset.*;

public class Bug_EUCTW {
    public static void main(String[] argv) throws Exception {
        Charset cs = Charset.forName("EUC_TW");
        CharsetEncoder enc = cs.newEncoder()
.onMalformedInput(CodingErrorAction.REPLACE)
.onUnmappableCharacter(CodingErrorAction.REPLACE);
CharsetDecoder dec = cs.newDecoder()
.onMalformedInput(CodingErrorAction.REPLACE)
.onUnmappableCharacter(CodingErrorAction.REPLACE);

        byte[] ba = new byte[4];
        char[] ca = new char[1];
        CharBuffer cb = CharBuffer.wrap(ca);
ByteBuffer bb = ByteBuffer.wrap(ba);
        CoderResult cr = null;
        int failed = 0;
        for (char c = '\u0000'; c < '\uffff'; c++) {
            if (enc.canEncode(c)) {
                cb.clear();
bb.clear();
ca[0] = c;
cr = enc.encode(cb, bb, true);
ca[0] = 0;
bb.flip();cb.clear();
cr = dec.decode(bb, cb, true);
                if (ca[0] != c) {
                    failed++;
System.out.printf(" encode(%x)=[%x,%x,%x,%x]: bb.pos=%d, decode(%x,%x,%x,%x)=%x, cb.pos=%d\n",
c&0xffff,
ba[0]&0xff, ba[1]&0xff, ba[2]&0xff, ba[3]&0xff,
bb.limit(),
ba[0]&0xff, ba[1]&0xff, ba[2]&0xff, ba[3]&0xff,
ca[0]&0xffff, cb.position());
}
}
}
        if (failed != 0) {
            System.out.printf("Total roundtrip failed %d\n", failed);
        } else
System.out.printf(" All Passed!");
    }
}

###@###.### 2005-2-16 08:54:31 GMT