2 * Copyright © 2013 Red Hat, Inc.
4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all copies and that both that copyright
7 * notice and this permission notice appear in supporting documentation, and
8 * that the name of the copyright holders not be used in advertising or
9 * publicity pertaining to distribution of the software without specific,
10 * written prior permission. The copyright holders make no representations
11 * about the suitability of this software for any purpose. It is provided "as
12 * is" without express or implied warranty.
14 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
30 #define LONG_BITS (sizeof(long) * 8)
31 #define NLONGS(x) (((x) + LONG_BITS - 1) / LONG_BITS)
32 #define ARRAY_LENGTH(a) (sizeof(a) / (sizeof((a)[0])))
33 #define unlikely(x) (__builtin_expect(!!(x),0))
38 ({ __typeof__ (a) _a = (a); \
39 __typeof__ (b) _b = (b); \
43 ({ __typeof__ (a) _a = (a); \
44 __typeof__ (b) _b = (b); \
50 startswith(const char *str, size_t len, const char *prefix, size_t plen)
52 return len >= plen && !strncmp(str, prefix, plen);
56 bit_is_set(const unsigned long *array, int bit)
58 return !!(array[bit / LONG_BITS] & (1LL << (bit % LONG_BITS)));
62 set_bit(unsigned long *array, int bit)
64 array[bit / LONG_BITS] |= (1LL << (bit % LONG_BITS));
68 clear_bit(unsigned long *array, int bit)
70 array[bit / LONG_BITS] &= ~(1LL << (bit % LONG_BITS));
74 set_bit_state(unsigned long *array, int bit, int state)
79 clear_bit(array, bit);