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/*
* Copyright © 2008-2011 Kristian Høgsberg
* Copyright © 2011 Intel Corporation
* Copyright © 2013-2015 Red Hat, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#pragma once
#include "config.h"
#include <assert.h>
#include <stdbool.h>
#include <stddef.h>
#define bit(x_) (1UL << (x_))
#define NBITS(b) (b * 8)
#define LONG_BITS (sizeof(long) * 8)
#define NLONGS(x) (((x) + LONG_BITS - 1) / LONG_BITS)
#define NCHARS(x) ((size_t)(((x) + 7) / 8))
/* This bitfield helper implementation is taken from from libevdev-util.h,
* except that it has been modified to work with arrays of unsigned chars
*/
static inline bool
bit_is_set(const unsigned char *array, int bit)
{
return !!(array[bit / 8] & (1 << (bit % 8)));
}
static inline void
set_bit(unsigned char *array, int bit)
{
array[bit / 8] |= (1 << (bit % 8));
}
static inline void
clear_bit(unsigned char *array, int bit)
{
array[bit / 8] &= ~(1 << (bit % 8));
}
static inline bool
long_bit_is_set(const unsigned long *array, int bit)
{
return !!(array[bit / LONG_BITS] & (1ULL << (bit % LONG_BITS)));
}
static inline void
long_set_bit(unsigned long *array, int bit)
{
array[bit / LONG_BITS] |= (1ULL << (bit % LONG_BITS));
}
static inline void
long_clear_bit(unsigned long *array, int bit)
{
array[bit / LONG_BITS] &= ~(1ULL << (bit % LONG_BITS));
}
static inline void
long_set_bit_state(unsigned long *array, int bit, int state)
{
if (state)
long_set_bit(array, bit);
else
long_clear_bit(array, bit);
}
static inline bool
long_any_bit_set(unsigned long *array, size_t size)
{
unsigned long i;
assert(size > 0);
for (i = 0; i < size; i++)
if (array[i] != 0)
return true;
return false;
}
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