mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
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208 lines
6.9 KiB
C++
208 lines
6.9 KiB
C++
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/*=============================================================================
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Copyright (c) 2011-2015 Bolero MURAKAMI
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https://github.com/bolero-MURAKAMI/Sprout
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#ifndef SPROUT_VALARRAY_MASKE_ARRAY_HPP
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#define SPROUT_VALARRAY_MASKE_ARRAY_HPP
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#include <sprout/config.hpp>
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#include <sprout/workaround/std/cstddef.hpp>
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#include <sprout/utility/swap.hpp>
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#include <sprout/iterator/index_iterator.hpp>
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#include <sprout/algorithm/count.hpp>
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#include <sprout/algorithm/cxx14/copy.hpp>
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#include <sprout/algorithm/cxx14/fill.hpp>
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#include <sprout/valarray/valarray_fwd.hpp>
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#include <sprout/detail/algorithm/mask_index.hpp>
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namespace sprout {
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//
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// mask_array
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//
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template<typename T, std::size_t N, std::size_t M>
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class mask_array {
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friend class sprout::valarray<T, N>;
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private:
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typedef sprout::valarray<T, N> valarray_type;
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public:
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typedef typename valarray_type::value_type value_type;
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typedef typename valarray_type::reference reference;
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typedef typename valarray_type::size_type size_type;
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typedef typename valarray_type::difference_type difference_type;
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typedef typename valarray_type::pointer pointer;
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typedef sprout::index_iterator<mask_array const&> iterator;
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private:
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typedef sprout::valarray<bool, M> mask_type;
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typedef sprout::valarray<size_type, (M < N ? M : N)> indexes_type;
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public:
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SPROUT_STATIC_CONSTEXPR size_type static_size = valarray_type::static_size;
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private:
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sprout::value_holder<valarray_type&> arr_;
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indexes_type indexes_;
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private:
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mask_array() = delete;
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SPROUT_CONSTEXPR mask_array(sprout::valarray<T, N>& arr, mask_type const& mask)
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: arr_(arr)
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, indexes_(
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sprout::detail::mask_index(
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mask.begin(), mask.end(),
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indexes_type(sprout::count(mask.begin(), mask.end(), true))
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)
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)
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{}
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public:
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SPROUT_CONSTEXPR mask_array(mask_array const& other)
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: arr_(other.arr_), indexes_(other.indexes_)
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{}
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template<std::size_t N2, std::size_t M2>
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SPROUT_CXX14_CONSTEXPR mask_array const&
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operator=(mask_array<T, N2, M2> const& ar) const {
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sprout::copy(ar.begin(), ar.end(), begin());
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return *this;
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}
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template<std::size_t N2>
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SPROUT_CXX14_CONSTEXPR void
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operator=(sprout::valarray<T, N2> const& ar) const {
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sprout::copy(ar.begin(), ar.end(), begin());
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}
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SPROUT_CXX14_CONSTEXPR void
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operator=(T const& value) const {
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sprout::fill(begin(), end(), value);
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}
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template<std::size_t N2>
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SPROUT_CXX14_CONSTEXPR void
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operator+=(sprout::valarray<T, N2> const& xs) const {
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iterator it2 = begin();
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for (typename sprout::valarray<T, N2>::const_iterator it = xs.begin(), last = xs.end(); it != last; ++it, ++it2) {
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*it2 += *it;
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}
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}
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template<std::size_t N2>
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SPROUT_CXX14_CONSTEXPR void
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operator-=(sprout::valarray<T, N2> const& xs) const {
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iterator it2 = begin();
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for (typename sprout::valarray<T, N2>::const_iterator it = xs.begin(), last = xs.end(); it != last; ++it, ++it2) {
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*it2 -= *it;
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}
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}
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template<std::size_t N2>
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SPROUT_CXX14_CONSTEXPR void
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operator*=(sprout::valarray<T, N2> const& xs) const {
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iterator it2 = begin();
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for (typename sprout::valarray<T, N2>::const_iterator it = xs.begin(), last = xs.end(); it != last; ++it, ++it2) {
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*it2 *= *it;
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}
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}
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template<std::size_t N2>
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SPROUT_CXX14_CONSTEXPR void
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operator/=(sprout::valarray<T, N2> const& xs) const {
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iterator it2 = begin();
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for (typename sprout::valarray<T, N2>::const_iterator it = xs.begin(), last = xs.end(); it != last; ++it, ++it2) {
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*it2 /= *it;
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}
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}
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template<std::size_t N2>
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SPROUT_CXX14_CONSTEXPR void
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operator%=(sprout::valarray<T, N2> const& xs) const {
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iterator it2 = begin();
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for (typename sprout::valarray<T, N2>::const_iterator it = xs.begin(), last = xs.end(); it != last; ++it, ++it2) {
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*it2 %= *it;
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}
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}
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template<std::size_t N2>
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SPROUT_CXX14_CONSTEXPR void
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operator&=(sprout::valarray<T, N2> const& xs) const {
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iterator it2 = begin();
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for (typename sprout::valarray<T, N2>::const_iterator it = xs.begin(), last = xs.end(); it != last; ++it, ++it2) {
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*it2 &= *it;
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}
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}
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template<std::size_t N2>
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SPROUT_CXX14_CONSTEXPR void
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operator|=(sprout::valarray<T, N2> const& xs) const {
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iterator it2 = begin();
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for (typename sprout::valarray<T, N2>::const_iterator it = xs.begin(), last = xs.end(); it != last; ++it, ++it2) {
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*it2 |= *it;
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}
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}
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template<std::size_t N2>
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SPROUT_CXX14_CONSTEXPR void
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operator^=(sprout::valarray<T, N2> const& xs) const {
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iterator it2 = begin();
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for (typename sprout::valarray<T, N2>::const_iterator it = xs.begin(), last = xs.end(); it != last; ++it, ++it2) {
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*it2 ^= *it;
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}
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}
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template<std::size_t N2>
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SPROUT_CXX14_CONSTEXPR void
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operator<<=(sprout::valarray<T, N2> const& xs) const {
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iterator it2 = begin();
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for (typename sprout::valarray<T, N2>::const_iterator it = xs.begin(), last = xs.end(); it != last; ++it, ++it2) {
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*it2 <<= *it;
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}
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}
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template<std::size_t N2>
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SPROUT_CXX14_CONSTEXPR void
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operator>>=(sprout::valarray<T, N2> const& xs) const {
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iterator it2 = begin();
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for (typename sprout::valarray<T, N2>::const_iterator it = xs.begin(), last = xs.end(); it != last; ++it, ++it2) {
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*it2 >>= *it;
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}
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}
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SPROUT_CXX14_CONSTEXPR void
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swap(mask_array& other) SPROUT_NOEXCEPT {
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sprout::swap(arr_, other.arr_);
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sprout::swap(indexes_, other.indexes_);
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}
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// iterators:
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SPROUT_CONSTEXPR iterator
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begin() const {
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return iterator(*this, 0);
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}
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SPROUT_CONSTEXPR iterator
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end() const {
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return iterator(*this, size());
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}
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// capacity:
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SPROUT_CONSTEXPR size_type size() const SPROUT_NOEXCEPT {
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return indexes_.size();
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}
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SPROUT_CONSTEXPR bool empty() const SPROUT_NOEXCEPT {
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return size() == 0;
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}
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// element access:
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SPROUT_CONSTEXPR reference operator[](size_type i) const {
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return (*arr_)[indexes_[i]];
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}
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SPROUT_CONSTEXPR reference at(size_type i) const {
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return arr_->at(indexes_.at(i));
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}
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SPROUT_CONSTEXPR reference front() const {
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return (*this)[0];
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}
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SPROUT_CONSTEXPR reference back() const {
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return (*this)[size() - 1];
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}
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};
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template<typename T, std::size_t N, std::size_t M>
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SPROUT_CONSTEXPR_OR_CONST typename sprout::mask_array<T, N, M>::size_type sprout::mask_array<T, N, M>::static_size;
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//
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// swap
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//
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template<typename T, std::size_t N, std::size_t M>
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inline SPROUT_CXX14_CONSTEXPR void
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swap(sprout::mask_array<T, N, M>& lhs, sprout::mask_array<T, N, M>& rhs)
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SPROUT_NOEXCEPT_IF_EXPR(lhs.swap(rhs))
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{
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lhs.swap(rhs);
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}
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} // namespace sprout
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#endif // #ifndef SPROUT_VALARRAY_MASKE_ARRAY_HPP
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