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author | David Robillard <d@drobilla.net> | 2022-09-16 15:39:48 -0400 |
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committer | David Robillard <d@drobilla.net> | 2022-09-16 22:31:06 -0400 |
commit | 49dab5622b31421eb6af84eae376d73fae1cd4a0 (patch) | |
tree | 86290707551320ab35952bccc11c66df05714b26 /include/chilbert/detail/BitVecIndex.hpp | |
parent | 342a22b6d75597ee22c195b60607402e3ed028b2 (diff) | |
download | chilbert-49dab5622b31421eb6af84eae376d73fae1cd4a0.tar.gz chilbert-49dab5622b31421eb6af84eae376d73fae1cd4a0.tar.bz2 chilbert-49dab5622b31421eb6af84eae376d73fae1cd4a0.zip |
Switch to meson build system
Diffstat (limited to 'include/chilbert/detail/BitVecIndex.hpp')
-rw-r--r-- | include/chilbert/detail/BitVecIndex.hpp | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/include/chilbert/detail/BitVecIndex.hpp b/include/chilbert/detail/BitVecIndex.hpp new file mode 100644 index 0000000..e7b385e --- /dev/null +++ b/include/chilbert/detail/BitVecIndex.hpp @@ -0,0 +1,51 @@ +/* + Copyright (C) 2018 David Robillard <d@drobilla.net> + Copyright (C) 2006-2007 Chris Hamilton <chamilton@cs.dal.ca> + + This program is free software: you can redistribute it and/or modify it under + the terms of the GNU General Public License as published by the Free Software + Foundation, either version 2 of the License, or (at your option) any later + version. + + This program is distributed in the hope that it will be useful, but WITHOUT + ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS + FOR A PARTICULAR PURPOSE. See the GNU General Public License for more + details. + + You should have received a copy of the GNU General Public License along with + this program. If not, see <https://www.gnu.org/licenses/>. +*/ + +#ifndef CHILBERT_BITVECINDEX_HPP +#define CHILBERT_BITVECINDEX_HPP + +#include <cassert> +#include <climits> +#include <cstddef> + +namespace chilbert { +namespace detail { + +/// Index into a multi-rack bit vector +template <class BitVec> +struct BitVecIndex +{ + using Rack = typename BitVec::Rack; + + static constexpr size_t bits_per_rack = sizeof(Rack) * CHAR_BIT; + + BitVecIndex(const size_t bits) + : rack{bits / bits_per_rack} + , bit{bits - rack * bits_per_rack} + { + assert(bit < bits_per_rack); + } + + size_t rack; + size_t bit; +}; + +} // namespace detail +} // namespace chilbert + +#endif |