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JDBC Type 4 driver for MySQL
/*
* Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, version 2.0, as published by the
* Free Software Foundation.
*
* This program is also distributed with certain software (including but not
* limited to OpenSSL) that is licensed under separate terms, as designated in a
* particular file or component or in included license documentation. The
* authors of MySQL hereby grant you an additional permission to link the
* program and your derivative works with the separately licensed software that
* they have included with MySQL.
*
* Without limiting anything contained in the foregoing, this file, which is
* part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
* version 1.0, a copy of which can be found at
* http://oss.oracle.com/licenses/universal-foss-exception.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License, version 2.0,
* for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.mysql.cj.util;
/**
* Utilities to manipulate internal data type formats.
*/
public class DataTypeUtil {
/**
* Interpret a BIT value as a long.
*
* @param bytes
* byte buffer
* @param offset
* offset in buffer
* @param length
* number of bytes to use
* @return long value
*/
public static long bitToLong(byte[] bytes, int offset, int length) {
long valueAsLong = 0;
for (int i = 0; i < length; i++) {
valueAsLong = valueAsLong << 8 | bytes[offset + i] & 0xff;
}
return valueAsLong;
}
}