53 lines
1.4 KiB
C++
53 lines
1.4 KiB
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
|