/*

 * 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;

/**

* A table driven conversion from char to byte for single byte

* character sets.  Tables will reside in the class CharToByteYYYYY,

* where YYYYY is a unique character set identifier

    < TBD: Tables are of the form... >

*

* @author Lloyd Honomichl

* @author Asmus Freytag

*/

public abstract class CharToByteSingleByte extends CharToByteConverter {

    /*

     * 1st level index, provided by subclass

     */

    /*

     * 2nd level index, provided by subclass

     */

    /*

     * Mask to isolate bits for 1st level index, from subclass

     */

    protected int   mask1;

    /*

     * Mask to isolate bits for 2nd level index, from subclass

     */

    protected int   mask2;

    /*

     * Shift to isolate bits for 1st level index, from subclass

     */

    protected int   shift;

    private char highHalfZoneCode;

        return index1;

    }

        return index2;

    }

    public int flush(byte[] output, int outStart, int outEnd)

        throws MalformedInputException

    {

        if (highHalfZoneCode != 0) {

            highHalfZoneCode = 0;

            badInputLength = 0;

            throw new MalformedInputException();

        }

        byteOff = charOff = 0;

        return 0;

    }

    /**

     * Converts characters to sequences of bytes.

     * Conversions that result in Exceptions can be restarted by calling

     * convert again, with appropriately modified parameters.

     * @return the characters written to output.

     * @param input char array containing text in Unicode

     * @param inStart offset in input array

     * @param inEnd offset of last byte to be converted

     * @param output byte array to receive conversion result

     * @param outStart starting offset

     * @param outEnd offset of last byte to be written to

     * @throw MalformedInputException for any sequence of chars that is

     * illegal in Unicode (principally unpaired surrogates

     * and \uFFFF or \uFFFE), including any partial surrogate pair

     * which occurs at the end of an input buffer.

     * @throw UnsupportedCharacterException for any character that

     * that cannot be converted to the external character set.

     */

    public int convert(char[] input, int inOff, int inEnd,

                       byte[] output, int outOff, int outEnd)

        throws MalformedInputException,

               UnknownCharacterException,

               ConversionBufferFullException

    {

        char    inputChar;          // Input character to be converted

        byte[]  outputByte;         // Output byte written to output

        int     inputSize;          // Size of input

        int     outputSize;         // Size of output

        byte[]  tmpArray = new byte[1];

        // Record beginning offsets

        charOff = inOff;

        byteOff = outOff;

        if (highHalfZoneCode != 0) {

            inputChar = highHalfZoneCode;

            highHalfZoneCode = 0;

            if (input[inOff] >= 0xdc00 && input[inOff] <= 0xdfff) {

                // This is legal UTF16 sequence.

                badInputLength = 1;

                throw new UnknownCharacterException();

            } else {

                // This is illegal UTF16 sequence.

                badInputLength = 0;

                throw new MalformedInputException();

            }

        }

        // Loop until we hit the end of the input

        while(charOff < inEnd) {

            outputByte = tmpArray;

            // Get the input character

            inputChar = input[charOff];

            // Default output size

            outputSize = 1;

            // Assume this is a simple character

            inputSize = 1;

            // Is this a high surrogate?

            if(inputChar >= '\uD800' && inputChar <= '\uDBFF') {

                // Is this the last character in the input?

                if (charOff + 1 >= inEnd) {

                    highHalfZoneCode = inputChar;

                    break;

                }

                // Is there a low surrogate following?

                inputChar = input[charOff + 1];

                if (inputChar >= '\uDC00' && inputChar <= '\uDFFF') {

                    // We have a valid surrogate pair.  Too bad we don't map

                    //  surrogates.  Is substitution enabled?

                    if (subMode) {

                        outputByte = subBytes;

                        outputSize = subBytes.length;

                        inputSize = 2;

                    } else {

                        badInputLength = 2;

                        throw new UnknownCharacterException();

                    }

                } else {

                    // We have a malformed surrogate pair

                    badInputLength = 1;

                    throw new MalformedInputException();

                }

            }

            // Is this an unaccompanied low surrogate?

            else if (inputChar >= '\uDC00' && inputChar <= '\uDFFF') {

                badInputLength = 1;

                throw new MalformedInputException();

            }

            // Not part of a surrogate, so look it up

            else {

                // Get output using two level lookup

                outputByte[0] = getNative(inputChar);

                // Might this character be unmappable?

                if (outputByte[0] == 0) {

                    // If outputByte is zero because the input was zero

                    //  then this character is actually mappable

                    if (input[charOff] != '\u0000') {

                        // We have an unmappable character

                        // Is substitution enabled?

                        if (subMode) {

                            outputByte = subBytes;

                            outputSize = subBytes.length;

                        } else {

                            badInputLength = 1;

                            throw new UnknownCharacterException();

                        }

                    }

                }

            }

            // If we don't have room for the output, throw an exception

            if (byteOff + outputSize > outEnd)

                throw new ConversionBufferFullException();

            // Put the byte in the output buffer

            for (int i = 0; i < outputSize; i++) {

                output[byteOff++] = outputByte[i];

            }

            charOff += inputSize;

        }

        // Return the length written to the output buffer

        return byteOff - outOff;

    }

    /**

     * the maximum number of bytes needed to hold a converted char

     * @returns the maximum number of bytes needed for a converted char

     */

    public int getMaxBytesPerChar() {

        return 1;

    }

    public byte getNative(char inputChar) {

    }

    /**

     *  Resets the converter.

     * Call this method to reset the converter to its initial state

     */

    public void reset() {

        byteOff = charOff = 0;

        highHalfZoneCode = 0;

    }

    /**

     * Return whether a character is mappable or not

     * @return true if a character is mappable

     */

    public boolean canConvert(char ch) {

    }

}