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52 lines
1.4 KiB
C++
52 lines
1.4 KiB
C++
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2013.
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This program is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the Free
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Software Foundation, either version 3 of the License, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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You should have received a copy of the GNU General Public License along with
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this program. If not, see <http://www.gnu.org/licenses/>.
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util.h
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Utility functions for the filesystem implementation.
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*******************************************************************************/
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#ifndef UTIL_H
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#define UTIL_H
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template <class T> T divup(T a, T b)
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{
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return a/b + (a % b ? 1 : 0);
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}
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template <class T> T roundup(T a, T b)
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{
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return a % b ? a + b - a % b : a;
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}
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inline bool checkbit(const uint8_t* bitmap, size_t bit)
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{
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uint8_t bits = bitmap[bit / 8UL];
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return bits & (1U << (bit % 8UL));
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}
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inline void setbit(uint8_t* bitmap, size_t bit)
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{
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bitmap[bit / 8UL] |= 1U << (bit % 8UL);
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}
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inline void clearbit(uint8_t* bitmap, size_t bit)
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{
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bitmap[bit / 8UL] &= ~(1U << (bit % 8UL));
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}
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#endif
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