wsutil/pow2.h

   1 /** @file
   2  *
   3  * Wireshark - Network traffic analyzer
   4  * By Gerald Combs <gerald@wireshark.org>
   5  * Copyright 1998 Gerald Combs
   6  *
   7  * SPDX-License-Identifier: GPL-2.0-or-later
   8  */
   9
  10 #ifndef __WS_POW2_H__
  11 #define __WS_POW2_H__
  12
  13 /*
  14  * Macros to calculate pow2^M, for various power-of-2 values and positive
  15  * integer values of M.  That's (2^N)^M, i.e. 2^(N*M).
  16  *
  17  * The first argument is the type of the desired result; the second
  18  * argument is M.
  19  */
  20 #define pow2(type, m)     (((type)1U) << (m))
  21 #define pow4(type, m)     (((type)1U) << (2*(m)))
  22 #define pow8(type, m)     (((type)1U) << (3*(m)))
  23 #define pow16(type, m)    (((type)1U) << (4*(m)))
  24 #define pow32(type, m)    (((type)1U) << (5*(m)))
  25 #define pow64(type, m)    (((type)1U) << (6*(m)))
  26 #define pow128(type, m)   (((type)1U) << (7*(m)))
  27 #define pow256(type, m)   (((type)1U) << (8*(m)))
  28
  29 #endif /* __WS_POW2_H__ */