Java example source code file (BitStatus.java)

This example Java source code file (BitStatus.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

bit_status_bits_num, bitstatus

The BitStatus.java Java example source code

/*
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 * of the Software, and to permit persons to whom the Software is furnished to do
 * so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package jdk.nashorn.internal.runtime.regexp.joni;

final class BitStatus {
    public static final int BIT_STATUS_BITS_NUM = 4 * 8;

    public static int bsClear() {
        return 0;
    }

    public static int bsAll() {
        return -1;
    }

    public static boolean bsAt(int stats, int n) {
        return (n < BIT_STATUS_BITS_NUM ? stats & (1 << n) : (stats & 1)) != 0;
    }

    public static int bsOnAt(int stats, int n) {
        if (n < BIT_STATUS_BITS_NUM) {
            stats |= (1 << n);
        } else {
            stats |= 1;
        }
        return stats;
    }

    public static int bsOnOff(int v, int f, boolean negative) {
        if (negative) {
            v &= ~f;
        } else {
            v |= f;
        }
        return v;
    }
}