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/* --*- c -*--
* Copyright (C) 2013 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 and/or 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef HH_ENSC_VDR_INPUTDEV_UTIL_HH
#define HH_ENSC_VDR_INPUTDEV_UTIL_HH
#define ARRAY_SIZE(_a) (sizeof(_a) / sizeof(_a)[0])
inline static bool test_bit(unsigned int bit, unsigned long const mask[])
{
unsigned long m = mask[bit / (sizeof mask[0] * 8)];
unsigned int i = bit % (sizeof mask[0] * 8);
return (m & (1u << i)) != 0u;
}
inline static void set_bit(unsigned int bit, unsigned long mask[])
{
unsigned int i = bit % (sizeof mask[0] * 8);
mask[bit / (sizeof mask[0] * 8)] |= (1u << i);
}
inline static void clear_bit(unsigned int bit, unsigned long mask[])
{
unsigned int i = bit % (sizeof mask[0] * 8);
mask[bit / (sizeof mask[0] * 8)] &= ~(1u << i);
}
inline static void change_bit(unsigned int bit, unsigned long mask[])
{
if (test_bit(bit, mask))
clear_bit(bit, mask);
else
set_bit(bit, mask);
}
#endif /* HH_ENSC_VDR_INPUTDEV_UTIL_HH */
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