/*

 * SPDX-License-Identifier: ISC

 *

 * Copyright (c) 2019-2020 Todd C. Miller <Todd.Miller@sudo.ws>

 *

 * Permission to use, copy, modify, and distribute this software for any

 * purpose with or without fee is hereby granted, provided that the above

 * copyright notice and this permission notice appear in all copies.

 *

 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR

 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN

 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF

 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

 */

/*

 * This is an open source non-commercial project. Dear PVS-Studio, please check it.

 * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com

 */

#include <config.h>

#include "sudo_compat.h"

#include "sudo_debug.h"

#include "sudo_util.h"

/*

 * Round 32-bit unsigned length to the next highest power of two.

 * Always returns at least 64.

 * Algorithm from bit twiddling hacks.

 */

unsigned int

sudo_pow2_roundup_v1(unsigned int len)

{

    if (len < 64)

  return 64;

    len--;

    len |= len >> 1;

    len |= len >> 2;

    len |= len >> 4;

    len |= len >> 8;

    len |= len >> 16;

    len++;

    return len;

}