Java Long Number Create toLong(final byte[] bytes, final int offset)

Description

to Long

License

Apache License

Declaration

static long toLong(final byte[] bytes, final int offset) 

Method Source Code

//package com.java2s;
/*// w w w . j a  v  a 2  s.  c o m
 * Copyright 2004-2005 Revolution Systems Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

public class Main {
    static long toLong(final byte[] bytes, final int offset) {
        final long high = (long) toInt(bytes, offset) << 32;
        final long low = (long) toInt(bytes, offset + 4) << 32 >>> 32;
        return high | low;
    }

    static int toInt(final byte[] bytes, final int offset) {
        final byte b1 = bytes[offset];
        final byte b2 = bytes[offset + 1];
        final byte b3 = bytes[offset + 2];
        final byte b4 = bytes[offset + 3];
        return b1 << 24 | (b2 & 0xFF) << 16 | (b3 & 0xFF) << 8 | b4 & 0xFF;
    }
}

Related

1. toLong(double[] in, long[] out)
2. toLong(double[] v)
3. toLong(final byte[] array, final int offset, final int length)
4. toLong(final byte[] b)
5. toLong(final byte[] b, final int offset)
6. toLong(final byte[] data)
7. toLong(final byte[] data)
8. toLong(final byte[] inputBytes, int offset)
9. toLong(final Object o, final String pattern)