// license:GPL-2.0+ // copyright-holders:Couriersud #ifndef PLISTS_H_ #define PLISTS_H_ /// /// \file plists.h /// #include "ptypes.h" #include #include #include #include namespace plib { /// \brief Array holding uninitialized elements /// /// Use with care. This template is provided to improve locality of storage /// in high frequency applications. It should not be used for anything else. /// template class uninitialised_array { public: using value_type = C; using pointer = value_type *; using const_pointer = const value_type *; using reference = value_type &; using const_reference = const value_type &; using iterator = value_type *; using const_iterator = const value_type *; using size_type = std::size_t; using difference_type = std::ptrdiff_t; using reverse_iterator = std::reverse_iterator; using const_reverse_iterator = std::reverse_iterator; //uninitialised_array_t() noexcept = default; uninitialised_array() noexcept = default; PCOPYASSIGNMOVE(uninitialised_array, delete) ~uninitialised_array() noexcept = default; constexpr size_t size() const noexcept { return N; } constexpr bool empty() const noexcept { return size() == 0; } reference operator[](size_type index) noexcept { // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast) return reinterpret_cast(m_buf[index]); } constexpr const_reference operator[](size_type index) const noexcept { // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast) return reinterpret_cast(m_buf[index]); } // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast) iterator begin() const noexcept { return reinterpret_cast(&m_buf[0]); } // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast) iterator end() const noexcept { return reinterpret_cast(&m_buf[0] + N); } // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast) iterator begin() noexcept { return reinterpret_cast(&m_buf[0]); } // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast) iterator end() noexcept { return reinterpret_cast(&m_buf[0] + N); } // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast) const_iterator cbegin() const noexcept { return reinterpret_cast(&m_buf[0]); } // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast) const_iterator cend() const noexcept { return reinterpret_cast(&m_buf[0] + N); } protected: private: std::array::type, N> m_buf; }; /// \brief fixed allocation vector /// /// Currently only emplace_back and clear are supported. /// /// Use with care. This template is provided to improve locality of storage /// in high frequency applications. It should not be used for anything else. /// template class static_vector { public: using value_type = C; using pointer = value_type *; using const_pointer = const value_type *; using reference = value_type &; using const_reference = const value_type &; using iterator = value_type *; using const_iterator = const value_type *; using size_type = std::size_t; using difference_type = std::ptrdiff_t; using reverse_iterator = std::reverse_iterator; using const_reverse_iterator = std::reverse_iterator; static_vector() noexcept : m_pos(0) { } PCOPYASSIGNMOVE(static_vector, delete) ~static_vector() noexcept { clear(); } constexpr size_t size() const noexcept { return m_pos; } constexpr bool empty() const noexcept { return size() == 0; } void clear() { for (size_type i=0; i void emplace_back(Args&&... args) { // placement new on buffer new (&m_buf[m_pos]) C(std::forward(args)...); m_pos++; } reference operator[](size_type index) noexcept { // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast) return reinterpret_cast(m_buf[index]); } constexpr const_reference operator[](size_type index) const noexcept { // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast) return reinterpret_cast(m_buf[index]); } // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast) iterator begin() const noexcept { return reinterpret_cast(&m_buf[0]); } // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast) iterator end() const noexcept { return reinterpret_cast(&m_buf[0] + m_pos); } // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast) iterator begin() noexcept { return reinterpret_cast(&m_buf[0]); } // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast) iterator end() noexcept { return reinterpret_cast(&m_buf[0] + m_pos); } // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast) const_iterator cbegin() const noexcept { return reinterpret_cast(&m_buf[0]); } // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast) const_iterator cend() const noexcept { return reinterpret_cast(&m_buf[0] + m_pos); } protected: private: std::array::type, N> m_buf; size_type m_pos; }; /// \brief a simple linked list. /// /// The list allows insertions deletions whilst being processed. /// template class linkedlist_t { public: struct element_t { public: friend class linkedlist_t; constexpr element_t() : m_next(nullptr), m_prev(nullptr) {} ~element_t() noexcept = default; PCOPYASSIGNMOVE(element_t, delete) constexpr LC *next() const noexcept { return m_next; } constexpr LC *prev() const noexcept { return m_prev; } private: LC * m_next; LC * m_prev; }; struct iter_t final : public std::iterator { private: LC* p; public: explicit constexpr iter_t(LC* x) noexcept : p(x) { } constexpr iter_t(iter_t &rhs) noexcept : p(rhs.p) { } iter_t(iter_t &&rhs) noexcept { std::swap(*this, rhs); } iter_t& operator=(const iter_t &rhs) noexcept // NOLINT(bugprone-unhandled-self-assignment, cert-oop54-cpp) { if (this == &rhs) return *this; p = rhs.p; return *this; } iter_t& operator=(iter_t &&rhs) noexcept { std::swap(*this, rhs); return *this; } ~iter_t() = default; iter_t& operator++() noexcept { p = p->next();return *this; } // NOLINTNEXTLINE(cert-dcl21-cpp) iter_t operator++(int) & noexcept { const iter_t tmp(*this); operator++(); return tmp; } constexpr bool operator==(const iter_t& rhs) const noexcept { return p == rhs.p; } constexpr bool operator!=(const iter_t& rhs) const noexcept { return p != rhs.p; } constexpr LC& operator*() noexcept { return *p; } constexpr LC* operator->() noexcept { return p; } constexpr LC& operator*() const noexcept { return *p; } constexpr LC* operator->() const noexcept { return p; } }; constexpr linkedlist_t() noexcept : m_head(nullptr) {} constexpr iter_t begin() const noexcept { return iter_t(m_head); } constexpr iter_t end() const noexcept { return iter_t(nullptr); } void push_front(LC *elem) noexcept { elem->m_next = m_head; elem->m_prev = nullptr; if (m_head) m_head->m_prev = elem; m_head = elem; } void push_back(LC *elem) noexcept { LC ** p(&m_head); LC * prev(nullptr); while (*p != nullptr) { prev = *p; p = &((*p)->m_next); } *p = elem; elem->m_prev = prev; elem->m_next = nullptr; } void remove(const LC *elem) noexcept { if (elem->m_prev) elem->m_prev->m_next = elem->m_next; else m_head = elem->m_next; if (elem->m_next) elem->m_next->m_prev = elem->m_prev; else { // update tail } } constexpr LC *front() const noexcept { return m_head; } constexpr bool empty() const noexcept { return (m_head == nullptr); } void clear() noexcept { LC *p(m_head); while (p != nullptr) { LC *n(p->m_next); p->m_next = nullptr; p->m_prev = nullptr; p = n; } m_head = nullptr; } private: LC *m_head; }; } // namespace plib #endif // PLISTS_H_