Java ByteBuffer to Int readInts4(final ByteBuffer buffer, final int[] array, final int count)

Description

read Ints

License

Open Source License

Declaration

public static void readInts4(final ByteBuffer buffer, final int[] array, final int count) throws IOException 

Method Source Code

//package com.java2s;
/*/*w ww  .jav a  2s  .c  om*/
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 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
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 * or LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
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 * file and include the License file at LICENSE.txt.
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import java.io.EOFException;
import java.io.IOException;
import java.io.InputStream;

import java.nio.ByteBuffer;

public class Main {
    public static void readInts4(final InputStream is, final int[] array, final int count) throws IOException {
        readInts4(is, array, count, 0);
    }

    public static int readInts4(final InputStream is, final int[] array, final int count, final int lowValue)
            throws IOException {
        int value = 0;
        int octet = 0;
        int readInts = 0;
        int shVal = 0;
        int neeble = 0;
        int neebleNum = 0;

        if (lowValue > 0) {
            octet = lowValue & 0xF;
            neebleNum = 1;
        }

        for (; readInts < count; neebleNum++) {
            if (neebleNum % 2 == 0) {
                octet = is.read();
                if (octet == -1) {
                    throw new EOFException();
                }
                neeble = octet >> 4;
            } else {
                neeble = octet & 0xF;
            }

            value |= ((neeble & 7) << shVal);
            if ((neeble & 8) == 0) {
                array[readInts++] = value;
                shVal = 0;
                value = 0;
            } else {
                shVal += 3;
            }
        }

        if (neebleNum % 2 != 0) {
            return 0x80 | (octet & 0xF);
        }

        return 0;
    }

    public static void readInts4(final ByteBuffer buffer, final int[] array, final int count) throws IOException {
        readInts4(buffer, array, count, 0);
    }

    public static int readInts4(final ByteBuffer buffer, final int[] array, final int count, final int lowValue)
            throws IOException {
        int value = 0;
        int octet = 0;
        int readInts = 0;
        int shVal = 0;
        int neeble = 0;
        int neebleNum = 0;

        if (lowValue > 0) {
            octet = lowValue & 0xF;
            neebleNum = 1;
        }

        for (; readInts < count; neebleNum++) {
            if (neebleNum % 2 == 0) {
                if (!buffer.hasRemaining()) {
                    throw new EOFException();
                }
                octet = buffer.get();

                neeble = octet >> 4;
            } else {
                neeble = octet & 0xF;
            }

            value |= ((neeble & 7) << shVal);
            if ((neeble & 8) == 0) {
                array[readInts++] = value;
                shVal = 0;
                value = 0;
            } else {
                shVal += 3;
            }
        }

        if (neebleNum % 2 != 0) {
            return 0x80 | (octet & 0xF);
        }

        return 0;
    }
}

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