78 lines
1.4 KiB
C++
78 lines
1.4 KiB
C++
/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/.
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*/
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#pragma once
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#include <vector>
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namespace OpenVulkano
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{
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template<typename T>
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class ChunkedArrayList
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{
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size_t m_chunkSize, m_size;
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std::vector<std::vector<T>> m_chunks; //TODO optimize
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void EnsureBuffer()
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{
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if (m_chunks.empty() || m_chunks.back().capacity() - m_chunks.back().size() == 0)
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{
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m_chunks.emplace_back().reserve(m_chunkSize);
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}
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}
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public:
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ChunkedArrayList() : m_chunkSize(8192), m_size(0)
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{}
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explicit ChunkedArrayList(ChunkedArrayList<T>&& old) noexcept
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: m_chunkSize(old.m_chunkSize), m_size(old.m_size), m_chunks(std::move(old.m_chunks))
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{
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old.m_size = 0;
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}
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void Clear()
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{
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m_chunks.clear();
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}
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template<typename ...ARGS>
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T& EmplaceBack(ARGS&&... args)
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{
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EnsureBuffer();
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m_size++;
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return m_chunks.back().emplace_back(std::forward<ARGS>(args)...);
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}
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T& InsertBack(const T& value)
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{
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EnsureBuffer();
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m_size++;
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return m_chunks.back().insert(value);
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}
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T& back()
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{
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return m_chunks.back().back();
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}
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[[nodiscard]] size_t size() const noexcept
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{
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return m_size;
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}
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T& operator[](size_t n)
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{
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return m_chunks[n / m_chunkSize][n % m_chunkSize];
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}
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const T& operator[](size_t n) const
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{
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return m_chunks[n / m_chunkSize][n % m_chunkSize];
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}
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};
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}
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