Mikio Hara
100 lines
3.1 KiB
C
100 lines
3.1 KiB
C
/* Copyright (c) 2008 The Board of Trustees of The Leland Stanford
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* Junior University
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*
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* We are making the OpenFlow specification and associated documentation
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* (Software) available for public use and benefit with the expectation
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* that others will use, modify and enhance the Software and contribute
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* those enhancements back to the community. However, since we would
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* like to make the Software available for broadest use, with as few
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* restrictions as possible permission is hereby granted, free of
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* charge, to any person obtaining a copy of this Software to deal in
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* the Software under the copyrights without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* The name and trademarks of copyright holder(s) may NOT be used in
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* advertising or publicity pertaining to the Software or any
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* derivatives without specific, written prior permission.
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*/
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#ifndef BITMAP_H
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#define BITMAP_H 1
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#include <limits.h>
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#include <stdlib.h>
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#include "util.h"
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#define BITMAP_ULONG_BITS (sizeof(unsigned long) * CHAR_BIT)
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static inline unsigned long *
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bitmap_unit__(const unsigned long *bitmap, size_t offset)
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{
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return (unsigned long *) &bitmap[offset / BITMAP_ULONG_BITS];
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}
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static inline unsigned long
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bitmap_bit__(size_t offset)
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{
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return 1UL << (offset % BITMAP_ULONG_BITS);
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}
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static inline unsigned long *
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bitmap_allocate(size_t n_bits)
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{
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return xcalloc(1, ROUND_UP(n_bits, BITMAP_ULONG_BITS));
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}
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static inline void
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bitmap_free(unsigned long *bitmap)
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{
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free(bitmap);
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}
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static inline bool
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bitmap_is_set(const unsigned long *bitmap, size_t offset)
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{
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return (*bitmap_unit__(bitmap, offset) & bitmap_bit__(offset)) != 0;
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}
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static inline void
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bitmap_set1(unsigned long *bitmap, size_t offset)
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{
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*bitmap_unit__(bitmap, offset) |= bitmap_bit__(offset);
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}
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static inline void
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bitmap_set0(unsigned long *bitmap, size_t offset)
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{
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*bitmap_unit__(bitmap, offset) &= ~bitmap_bit__(offset);
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}
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static inline void
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bitmap_set(unsigned long *bitmap, size_t offset, bool value)
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{
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if (value) {
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bitmap_set1(bitmap, offset);
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} else {
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bitmap_set0(bitmap, offset);
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}
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}
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void bitmap_set_multiple(unsigned long *, size_t start, size_t count,
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bool value);
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bool bitmap_equal(const unsigned long *, const unsigned long *, size_t n);
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#endif /* bitmap.h */
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