1 /* Some elementary bit manipulations
10 Bacula® - The Network Backup Solution
12 Copyright (C) 2000-2006 Free Software Foundation Europe e.V.
14 The main author of Bacula is Kern Sibbald, with contributions from
15 many others, a complete list can be found in the file AUTHORS.
16 This program is Free Software; you can redistribute it and/or
17 modify it under the terms of version two of the GNU General Public
18 License as published by the Free Software Foundation and included
21 This program is distributed in the hope that it will be useful, but
22 WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
24 General Public License for more details.
26 You should have received a copy of the GNU General Public License
27 along with this program; if not, write to the Free Software
28 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
31 Bacula® is a registered trademark of Kern Sibbald.
32 The licensor of Bacula is the Free Software Foundation Europe
33 (FSFE), Fiduciary Program, Sumatrastrasse 25, 8006 Zürich,
34 Switzerland, email:ftf@fsfeurope.org.
40 /* number of bytes to hold n bits */
41 #define nbytes_for_bits(n) ((((n)-1)>>3)+1)
43 /* test if bit is set */
44 #define bit_is_set(b, var) (((var)[(b)>>3] & (1<<((b)&0x7))) != 0)
47 #define set_bit(b, var) ((var)[(b)>>3] |= (1<<((b)&0x7)))
50 #define clear_bit(b, var) ((var)[(b)>>3] &= ~(1<<((b)&0x7)))
53 #define clear_all_bits(b, var) memset(var, 0, nbytes_for_bits(b))
55 /* set range of bits */
56 #define set_bits(f, l, var) { \
58 for (i=f; i<=l; i++) \
62 /* clear range of bits */
63 #define clear_bits(f, l, var) { \
65 for (i=f; i<=l; i++) \
69 #endif /* __BITS_H_ */