1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 1997-9, 2000 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation, either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will 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.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 /* Sets bit Y starting at address X. */
23 #define SET_BIT(X, Y) \
24 (((unsigned char *) X)[(Y) / CHAR_BIT] |= 1 << ((Y) % CHAR_BIT))
26 /* Clears bit Y starting at address X. */
27 #define CLEAR_BIT(X, Y) \
28 (((unsigned char *) X)[(Y) / CHAR_BIT] &= ~(1 << ((Y) % CHAR_BIT)))
30 /* Sets bit Y starting at address X to Z, which is zero/nonzero */
31 #define SET_BIT_TO(X, Y, Z) \
32 ((Z) ? SET_BIT(X, Y) : CLEAR_BIT(X, Y))
34 /* Nonzero if bit Y starting at address X is set. */
35 #define TEST_BIT(X, Y) \
36 (((unsigned char *) X)[(Y) / CHAR_BIT] & (1 << ((Y) % CHAR_BIT)))
38 /* Returns 2**X, 0 <= X < 32. */
39 #define BIT_INDEX(X) (1ul << (X))
41 #endif /* bitvector.h */