69 lines
2.2 KiB
C
69 lines
2.2 KiB
C
/**
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* Copyright (c) 2019 Leonardo Vencovsky
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*
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* This file is part of the C Macro Collections Library.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* 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, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN 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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/**
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* bitset.h
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*
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* Creation Date: 20/05/2020
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*
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* Authors:
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* Leonardo Vencovsky (https://github.com/LeoVen)
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*
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*/
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/**
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* Things commonly used by bitset collections.
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*/
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#ifndef CMC_COR_BITSET_H
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#define CMC_COR_BITSET_H
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#include "core.h"
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/* Defines the underlaying data type for the bitset array */
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/* Possible values: uint64_t, uint32_t, uint16_t, uint8_t, size_t */
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#ifndef CMC_BITSET_WORD_TYPE
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#define CMC_BITSET_WORD_TYPE uint32_t
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#endif /* CMC_BITSET_WORD_TYPE */
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typedef CMC_BITSET_WORD_TYPE cmc_bitset_word;
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/**
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* cmc_bidx_to_widx
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*
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* Translates a bit index to a word index
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*/
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static inline size_t cmc_bidx_to_widx(size_t idx)
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{
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/* Calculate how many shifts based on the size of cmc_bitset_word */
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static const size_t shift = ((sizeof(cmc_bitset_word) * 8) >> 6) > 0 ? 6
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: ((sizeof(cmc_bitset_word) * 8) >> 5) > 0 ? 5
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: ((sizeof(cmc_bitset_word) * 8) >> 4) > 0 ? 4
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: 3;
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return idx >> shift;
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}
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#endif /* CMC_COR_BITSET_H */
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