Java InputStream Read Long readLong(InputStream stream)

Description

read Long

License

Open Source License

Declaration

public static long readLong(InputStream stream) throws IOException 

Method Source Code

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

import java.io.IOException;
import java.io.InputStream;

public class Main {
    public static long readLong(InputStream stream) throws IOException {
        long a = readUInt(stream);
        long b = readUInt(stream);

        return a + (b << 32);
    }//from  w ww  . j  a  v a  2  s . c om

    @SuppressWarnings("PointlessBitwiseExpression")
    public static long readLong(byte[] src, int offset) {
        long a = readUInt(src, offset);
        long b = readUInt(src, offset + 4);

        return (a & 0xFFFFFFFF) + ((b & 0xFFFFFFFF) << 32);
    }

    public static long readUInt(InputStream stream) throws IOException {
        long a = stream.read();
        if (a < 0) {
            throw new IOException();
        }
        long b = stream.read();
        if (b < 0) {
            throw new IOException();
        }
        long c = stream.read();
        if (c < 0) {
            throw new IOException();
        }
        long d = stream.read();
        if (d < 0) {
            throw new IOException();
        }

        return a + (b << 8) + (c << 16) + (d << 24);
    }

    public static long readUInt(byte[] src) {
        return readUInt(src, 0);
    }

    public static long readUInt(byte[] src, int offset) {
        long a = src[offset] & 0xFF;
        long b = src[offset + 1] & 0xFF;
        long c = src[offset + 2] & 0xFF;
        long d = src[offset + 3] & 0xFF;

        return a + (b << 8) + (c << 16) + (d << 24);
    }
}

Related

1. readLong(InputStream is)
2. readLong(InputStream is)
3. readLong(InputStream is)
4. readLong(InputStream is)
5. readLong(InputStream stream)
6. readLong(InputStream stream)
7. readLong(InputStream stream)
8. readLongFrom(InputStream is)
9. readLongLE(InputStream in)