100 lines
2.7 KiB
C++
100 lines
2.7 KiB
C++
#pragma once
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#include <concepts>
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#include <vector>
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namespace zstd {
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template<typename T>
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void malloc_list(T*& ptr, int count) {
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ptr = (T*)malloc(count * sizeof(T));
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for (size_t i = 0; i < count; i++)
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{
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std::construct_at(ptr + i);
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}
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}
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template<typename T>
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class harray {
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protected:
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T* m_ptr{nullptr};
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int m_count{0};
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public:
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constexpr harray() {}
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harray(const std::vector<T>& vec)noexcept {
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m_count = vec.size();
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if (m_count > 0) {
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malloc_list(m_ptr, m_count);
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std::move(vec.begin(), vec.end(), m_ptr);
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}
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}
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~harray() {
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for (int i = 0; i < m_count; i++) {
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std::destroy_at(m_ptr + i);
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}
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m_ptr = nullptr;
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m_count = 0;
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}
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constexpr void reset() noexcept {
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m_ptr = nullptr;
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m_count = 0;
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}
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constexpr T* data() noexcept {
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return m_ptr;
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}
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constexpr T* front() noexcept {
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return m_ptr;
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}
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constexpr T* back() noexcept {
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return m_ptr + m_count;
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}
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constexpr T* at(int i) noexcept {
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if (i < m_count) {
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return m_ptr + i;
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}
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return nullptr;
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}
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constexpr bool IsValid() const noexcept {
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return m_count > 0;
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}
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constexpr bool empty() const noexcept {
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return m_count == 0;
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}
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constexpr int size() const noexcept {
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return m_count;
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}
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constexpr auto begin() noexcept {
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return iterator{ m_ptr };
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}
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constexpr auto end() noexcept {
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return iterator{ m_ptr + m_count };
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}
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// Iterator class
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class iterator {
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private:
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const T* ptr;
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public:
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constexpr iterator(const T* p) : ptr(p) {}
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// Overload ++ to move to next element
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constexpr iterator& operator++() noexcept {
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++ptr;
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return *this;
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}
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//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD><CAB5>--it,<2C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>it--
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constexpr iterator& operator--(int) noexcept {
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--ptr;
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return *this;
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}
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constexpr const T* operator->() const noexcept {
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return ptr;
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}
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// Overload * to dereference iterator
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constexpr const T& operator*() const noexcept {
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return *ptr;
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}
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// Overload != to compare iterators
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constexpr bool operator!=(const iterator& other) const noexcept {
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return ptr != other.ptr;
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}
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};
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};
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} |