libphobos/libdruntime/core/sys/dragonflybsd/sys/_bitset.d

   1 /**
   2  * D header file for DragonFlyBSD.
   3  *
   4  * Authors: Martin Nowak, Diederik de Groot(port:DragonFlyBSD)
   5  * Copied:  From core/sys/freebsd/sys
   6  */
   7 module core.sys.dragonflybsd.sys._bitset;
   8
   9 version (DragonFlyBSD):
  10 extern (C) pure nothrow @nogc @system:
  11
  12 import core.stdc.config : c_long;
  13
  14 enum NBBY = 8; // number of bits per byte
  15
  16 enum _BITSET_BITS = c_long.sizeof * NBBY;
  17
  18 enum __bitset_words(size_t s) = (s + _BITSET_BITS - 1) / _BITSET_BITS;
  19
  20 c_long __bitset_mask(size_t s)(size_t n)
  21 {
  22     static if (__bitset_words!s == 1)
  23         return (cast(c_long)1) << n;
  24     else
  25         return (cast(c_long)1) << n % _BITSET_BITS;
  26 }
  27
  28 size_t __bitset_word(size_t s)(size_t n)
  29 {
  30     static if (__bitset_words!s == 1)
  31         return 0;
  32     else
  33         return n / _BITSET_BITS;
  34 }
  35
  36 struct BITSET_DEFINE(size_t s)
  37 {
  38     c_long[__bitset_words!s] __bits;
  39 }
  40
  41 // no idea how to translate those
  42 //#define BITSET_T_INITIALIZER(x)                     \
  43 //    { .__bits = { x } }
  44 //
  45 //#define BITSET_FSET(n)                          \
  46 //    [ 0 ... ((n) - 1) ] = (-1L)