// Copyright 2017 JanusGraph Authors
//
// 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.
package org.janusgraph.util.datastructures;
/**
* Utility class for setting and reading individual bits in a byte.
*
* @author Matthias Broecheler (me@matthiasb.com)
*/
public class BitMap {
public final static byte createMapb(int pos) {
assert pos >= 0 && pos < 8;
return (byte) (1 << pos);
}
public final static byte setBitb(byte map, int pos) {
assert pos >= 0 && pos < 8;
return (byte) (map | (1 << pos));
}
public final static byte unsetBitb(byte map, int pos) {
assert pos >= 0 && pos < 8;
return (byte) (map & ~(1 << pos));
}
public final static boolean readBitb(byte map, int pos) {
assert pos >= 0 && pos < 8;
return ((map >>> pos) & 1) == 1;
}
}