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/*
* Copyright (c) 2015-2016, Intel Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Intel Corporation nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef FATBIT_H
#define FATBIT_H
/** \file
* \brief Multibit: fast bitset structure for use in scratch.
* Uses more space than mmbit, to avoid partial words for hopefully a taddy more
* performance.
*
* API is also trimmed down.
*/
#include "multibit.h"
#include "ue2common.h"
#ifdef __cplusplus
extern "C" {
#endif
#define MIN_FAT_SIZE 32
struct fatbit {
union {
u64a flat[MIN_FAT_SIZE / sizeof(u64a)];
u8 raw[MIN_FAT_SIZE];
} fb_int;
u64a tail[];
};
static really_inline
void fatbit_clear(struct fatbit *bits) {
assert(ISALIGNED(bits));
memset(bits, 0, sizeof(struct fatbit));
}
static really_inline
char fatbit_set(struct fatbit *bits, u32 total_bits, u32 key) {
assert(ISALIGNED(bits));
return mmbit_set(bits->fb_int.raw, total_bits, key);
}
static really_inline
void fatbit_unset(struct fatbit *bits, u32 total_bits, u32 key) {
assert(ISALIGNED(bits));
mmbit_unset(bits->fb_int.raw, total_bits, key);
}
static really_inline
char fatbit_isset(const struct fatbit *bits, u32 total_bits, u32 key) {
assert(ISALIGNED(bits));
return mmbit_isset(bits->fb_int.raw, total_bits, key);
}
static really_inline
u32 fatbit_iterate(const struct fatbit *bits, u32 total_bits, u32 it_in) {
assert(ISALIGNED(bits));
/* TODO: iterate_flat could be specialised as we don't have to worry about
* partial blocks. */
return mmbit_iterate(bits->fb_int.raw, total_bits, it_in);
}
#ifdef __cplusplus
} // extern "C"
#endif
#endif
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