Java ByteBuffer Put putDecInt(ByteBuffer buffer, int n)

Description

put Dec Int

License

Open Source License

Declaration

public static void putDecInt(ByteBuffer buffer, int n) 

Method Source Code

//package com.java2s;
//  are made available under the terms of the Eclipse Public License v1.0

import java.nio.ByteBuffer;

public class Main {
    static final byte[] DIGIT = { (byte) '0', (byte) '1', (byte) '2', (byte) '3', (byte) '4', (byte) '5',
            (byte) '6', (byte) '7', (byte) '8', (byte) '9', (byte) 'A', (byte) 'B', (byte) 'C', (byte) 'D',
            (byte) 'E', (byte) 'F' };
    private final static int[] decDivisors = { 1000000000, 100000000, 10000000, 1000000, 100000, 10000, 1000, 100,
            10, 1 };//from   ww w  . j a  va2s .  c  o m

    public static void putDecInt(ByteBuffer buffer, int n) {
        if (n < 0) {
            buffer.put((byte) '-');

            if (n == Integer.MIN_VALUE) {
                buffer.put((byte) '2');
                n = 147483648;
            } else
                n = -n;
        }

        if (n < 10) {
            buffer.put(DIGIT[n]);
        } else {
            boolean started = false;
            // This assumes constant time int arithmatic
            for (int decDivisor : decDivisors) {
                if (n < decDivisor) {
                    if (started)
                        buffer.put((byte) '0');
                    continue;
                }

                started = true;
                int d = n / decDivisor;
                buffer.put(DIGIT[d]);
                n = n - d * decDivisor;
            }
        }
    }

    /**
     * Put data from one buffer into another, avoiding over/under flows
     * @param from Buffer to take bytes from in flush mode
     * @param to   Buffer to put bytes to in fill mode.
     * @return number of bytes moved
     */
    public static int put(ByteBuffer from, ByteBuffer to) {
        int put;
        int remaining = from.remaining();
        if (remaining > 0) {
            if (remaining <= to.remaining()) {
                to.put(from);
                put = remaining;
                from.position(from.limit());
            } else if (from.hasArray()) {
                put = to.remaining();
                to.put(from.array(), from.arrayOffset() + from.position(), put);
                from.position(from.position() + put);
            } else {
                put = to.remaining();
                ByteBuffer slice = from.slice();
                slice.limit(put);
                to.put(slice);
                from.position(from.position() + put);
            }
        } else
            put = 0;

        return put;
    }
}

Related

1. putByteArray(ByteBuffer byteBuffer, byte[] array)
2. putByteAsString(ByteBuffer buffer, byte value)
3. putByteBuffer(ByteBuffer source, ByteBuffer target)
4. putBytesUnescaped(ByteBuffer buffer, byte[] data)
5. putCharSequence(ByteBuffer buf, Charset charset, CharSequence value)
6. putInt(ByteBuffer bb, long value)
7. putInt(ByteBuffer buffer, int val, ByteOrder order)
8. putInt(final ByteBuffer buffer, int value)
9. putInt(int i, ByteBuffer buffer)