Java ByteBuffer Decode decodeTime(byte firstByte, ByteBuffer buffer)

Description

decode Time

License

Open Source License

Declaration

public static long decodeTime(byte firstByte, ByteBuffer buffer) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.nio.ByteBuffer;

public class Main {
    private static final byte OB_DATETIME_SIGN_BIT = 2;
    private static final byte OB_DATETIME_LEN_MASK = 0x03;

    public static long decodeTime(byte firstByte, ByteBuffer buffer) {
        boolean isNeg = testBit(firstByte, OB_DATETIME_SIGN_BIT);
        long value = decodeTimeWithoutSign(firstByte, buffer);
        return isNeg ? -value : value;
    }//from   w  w  w.j av  a  2s. c o  m

    private static boolean testBit(byte target, byte pos) {
        return 0 != (target & (1 << pos));
    }

    public static long decodeTimeWithoutSign(byte firstByte,
            ByteBuffer buffer) {
        int lenMark = firstByte & OB_DATETIME_LEN_MASK;
        int len = 0;
        if (lenMark == 0) {
            len = 4;
        } else if (lenMark == 1) {
            len = 6;
        } else if (lenMark == 2) {
            len = 8;
        }
        long value = 0;
        for (int n = 0; n < len; n++) {
            value |= ((buffer.get() & 0xffl) << (n << 3));
        }
        return value;
    }
}

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3. decodeStoredBits(ByteBuffer bb)
4. decodeStringSequence(ByteBuffer bb)
5. decodeThrowing(Charset charset, ByteBuffer in)
6. decodeTimeWithoutSign(byte firstByte, ByteBuffer buffer)
7. decodeToString(ByteBuffer shaderInfoLogBuffer, IntBuffer size)
8. decodeUtf8(ByteBuffer bytes)
9. decodeUTF8(ByteBuffer utf8Data)