db/bit.h

   1 /*
   2  * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18
  19 #define bitize(s)       ((s) * NBBY)
  20 #define bitsz(t)        bitize(sizeof(t))
  21 #define bitszof(x,y)    bitize(szof(x,y))
  22 #define byteize(s)      ((s) / NBBY)
  23 #define bitoffs(s)      ((s) % NBBY)
  24 #define byteize_up(s)   (((s) + NBBY - 1) / NBBY)
  25
  26 #define BVUNSIGNED      0
  27 #define BVSIGNED        1
  28
  29 extern int64_t          getbitval(void *obj, int bitoff, int nbits, int flags);
  30 extern void             setbitval(void *obuf, int bitoff, int nbits, void *ibuf);
  31 extern int              getbit_l(char *ptr, int bit);
  32 extern void             setbit_l(char *ptr, int bit, int val);