/*
 * Copyright (c) 2013-2015 Mozilla Foundation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a 
 * copy of this software and associated documentation files (the "Software"), 
 * to deal in the Software without restriction, including without limitation 
 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 
 * and/or sell copies of the Software, and to permit persons to whom the 
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in 
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
 * DEALINGS IN THE SOFTWARE.
 */

package nu.validator.encoding;

import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.CoderResult;

class UserDefinedDecoder extends Decoder {

    UserDefinedDecoder(Charset cs) {
        super(cs, 1.0f, 1.0f);
    }

    @Override protected CoderResult decodeLoop(ByteBuffer in, CharBuffer out) {
        // TODO figure out if it's worthwhile to optimize the case where both
        // buffers are array-backed.
        for (;;) {
            if (!in.hasRemaining()) {
                return CoderResult.UNDERFLOW;
            }
            if (!out.hasRemaining()) {
                return CoderResult.OVERFLOW;
            }
            int b = (int)in.get();
            if (b >= 0) {
                out.put((char)b);
            } else {
                out.put((char)(b + 128 + 0xF780));
            }
        }
    }

}
