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// --- BEGIN COPYRIGHT BLOCK ---
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; version 2 of the License.
//
// This program 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 for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// (C) 2007 Red Hat, Inc.
// All rights reserved.
// --- END COPYRIGHT BLOCK ---
package netscape.security.util;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.Charset;
import java.nio.charset.CharsetEncoder;
import java.nio.charset.CoderResult;
/**
* Converts characters in ASN.1 UniversalString character set to UniversalString
* bytes.
*
* @author Lily Hsiao
* @author Slava Galperin
*/
public class UniversalCharsetEncoder extends CharsetEncoder {
public UniversalCharsetEncoder(Charset cs) {
super(cs, 4, 4, new byte[] { 0, 0, 0, 0 });
}
/*
* Converts an array of Unicode characters into an array of UniversalString
* bytes and returns the conversion result.
* @param in input character buffer to convert.
* @param out byte buffer to store output.
* @return encoding result.
*/
protected CoderResult encodeLoop(CharBuffer in, ByteBuffer out) {
while (true) {
if (in.remaining() < 1)
return CoderResult.UNDERFLOW;
in.mark();
char c = in.get();
if (out.remaining() < 4) {
in.reset();
return CoderResult.OVERFLOW;
}
out.put((byte) 0);
out.put((byte) 0);
out.put((byte) ((c >> 8) & 0xff));
out.put((byte) (c & 0xff));
}
}
}
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