50 lines
1.4 KiB
C++
50 lines
1.4 KiB
C++
/*
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* Copyright (c) 2013, 2015 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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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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static 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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static 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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static 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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