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sortix--sortix/ext/util.h
2013-12-17 14:30:46 +01:00

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C++

/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2013.
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, either version 3 of the License, or (at your option)
any later version.
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/>.
util.h
Utility functions for the filesystem implementation.
*******************************************************************************/
#ifndef UTIL_H
#define UTIL_H
template <class T> T divup(T a, T b)
{
return a/b + (a % b ? 1 : 0);
}
template <class T> T roundup(T a, T b)
{
return a % b ? a + b - a % b : a;
}
inline bool checkbit(const uint8_t* bitmap, size_t bit)
{
uint8_t bits = bitmap[bit / 8UL];
return bits & (1U << (bit % 8UL));
}
inline void setbit(uint8_t* bitmap, size_t bit)
{
bitmap[bit / 8UL] |= 1U << (bit % 8UL);
}
inline void clearbit(uint8_t* bitmap, size_t bit)
{
bitmap[bit / 8UL] &= ~(1U << (bit % 8UL));
}
#endif