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 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle 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,

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package com.sun.xml.internal.fastinfoset.algorithm;

import java.io.EOFException;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.nio.CharBuffer;

import java.util.ArrayList;

import java.util.List;

import com.sun.xml.internal.org.jvnet.fastinfoset.EncodingAlgorithmException;

import com.sun.xml.internal.fastinfoset.CommonResourceBundle;

public class LongEncodingAlgorithm extends IntegerEncodingAlgorithm {

    public int getPrimtiveLengthFromOctetLength(int octetLength) throws EncodingAlgorithmException {

        if (octetLength % LONG_SIZE != 0) {

            throw new EncodingAlgorithmException(CommonResourceBundle.getInstance().

                    getString("message.lengthNotMultipleOfLong", new Object[]{Integer.valueOf(LONG_SIZE)}));

        }

        return octetLength / LONG_SIZE;

    }

    public int getOctetLengthFromPrimitiveLength(int primitiveLength) {

        return primitiveLength * LONG_SIZE;

    }

    public final Object decodeFromBytes(byte[] b, int start, int length) throws EncodingAlgorithmException {

        long[] data = new long[getPrimtiveLengthFromOctetLength(length)];

        decodeFromBytesToLongArray(data, 0, b, start, length);

        return data;

    }

    public final Object decodeFromInputStream(InputStream s) throws IOException {

        return decodeFromInputStreamToIntArray(s);

    }

    public void encodeToOutputStream(Object data, OutputStream s) throws IOException {

        if (!(data instanceof long[])) {

            throw new IllegalArgumentException(CommonResourceBundle.getInstance().getString("message.dataNotLongArray"));

        }

        final long[] ldata = (long[])data;

        encodeToOutputStreamFromLongArray(ldata, s);

    }

    public Object convertFromCharacters(char[] ch, int start, int length) {

        final CharBuffer cb = CharBuffer.wrap(ch, start, length);

        final List longList = new ArrayList();

        matchWhiteSpaceDelimnatedWords(cb,

                new WordListener() {

            public void word(int start, int end) {

                String lStringValue = cb.subSequence(start, end).toString();

                longList.add(Long.valueOf(lStringValue));

            }

        }

        );

        return generateArrayFromList(longList);

    }

    public void convertToCharacters(Object data, StringBuffer s) {

        if (!(data instanceof long[])) {

            throw new IllegalArgumentException(CommonResourceBundle.getInstance().getString("message.dataNotLongArray"));

        }

        final long[] ldata = (long[])data;

        convertToCharactersFromLongArray(ldata, s);

    }

    public final void decodeFromBytesToLongArray(long[] ldata, int istart, byte[] b, int start, int length) {

        final int size = length / LONG_SIZE;

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

            ldata[istart++] =

                    ((long)(b[start++] & 0xFF) << 56) |

                    ((long)(b[start++] & 0xFF) << 48) |

                    ((long)(b[start++] & 0xFF) << 40) |

                    ((long)(b[start++] & 0xFF) << 32) |

                    ((long)(b[start++] & 0xFF) << 24) |

                    ((long)(b[start++] & 0xFF) << 16) |

                    ((long)(b[start++] & 0xFF) << 8) |

                    (long)(b[start++] & 0xFF);

        }

    }

    public final long[] decodeFromInputStreamToIntArray(InputStream s) throws IOException {

        final List longList = new ArrayList();

        final byte[] b = new byte[LONG_SIZE];

        while (true) {

            int n = s.read(b);

            if (n != LONG_SIZE) {

                if (n == -1) {

                    break;

                }

                while(n != LONG_SIZE) {

                    final int m = s.read(b, n, LONG_SIZE - n);

                    if (m == -1) {

                        throw new EOFException();

                    }

                    n += m;

                }

            }

            final long l =

                    (((long) b[0] << 56) +

                    ((long) (b[1] & 0xFF) << 48) +

                    ((long) (b[2] & 0xFF) << 40) +

                    ((long) (b[3] & 0xFF) << 32) +

                    ((long) (b[4] & 0xFF) << 24) +

                    ((b[5] & 0xFF) << 16) +

                    ((b[6] & 0xFF) << 8) +

                    ((b[7] & 0xFF) << 0));

            longList.add(Long.valueOf(l));

        }

        return generateArrayFromList(longList);

    }

    public final void encodeToOutputStreamFromLongArray(long[] ldata, OutputStream s) throws IOException {

        for (int i = 0; i < ldata.length; i++) {

            final long bits = ldata[i];

            s.write((int)((bits >>> 56) & 0xFF));

            s.write((int)((bits >>> 48) & 0xFF));

            s.write((int)((bits >>> 40) & 0xFF));

            s.write((int)((bits >>> 32) & 0xFF));

            s.write((int)((bits >>> 24) & 0xFF));

            s.write((int)((bits >>> 16) & 0xFF));

            s.write((int)((bits >>> 8) & 0xFF));

            s.write((int)(bits & 0xFF));

        }

    }

    public final void encodeToBytes(Object array, int astart, int alength, byte[] b, int start) {

        encodeToBytesFromLongArray((long[])array, astart, alength, b, start);

    }

    public final void encodeToBytesFromLongArray(long[] ldata, int lstart, int llength, byte[] b, int start) {

        final int lend = lstart + llength;

        for (int i = lstart; i < lend; i++) {

            final long bits = ldata[i];

            b[start++] = (byte)((bits >>> 56) & 0xFF);

            b[start++] = (byte)((bits >>> 48) & 0xFF);

            b[start++] = (byte)((bits >>> 40) & 0xFF);

            b[start++] = (byte)((bits >>> 32) & 0xFF);

            b[start++] = (byte)((bits >>> 24) & 0xFF);

            b[start++] = (byte)((bits >>> 16) & 0xFF);

            b[start++] = (byte)((bits >>>  8) & 0xFF);

            b[start++] = (byte)(bits & 0xFF);

        }

    }

    public final void convertToCharactersFromLongArray(long[] ldata, StringBuffer s) {

        final int end = ldata.length - 1;

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

            s.append(Long.toString(ldata[i]));

            if (i != end) {

                s.append(' ');

            }

        }

    }

    public final long[] generateArrayFromList(List array) {

        long[] ldata = new long[array.size()];

        for (int i = 0; i < ldata.length; i++) {

            ldata[i] = ((Long)array.get(i)).longValue();

        }

        return ldata;

    }

}