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https://github.com/wpilibsuite/allwpilib
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63 lines
1.6 KiB
C++
63 lines
1.6 KiB
C++
/*----------------------------------------------------------------------------*/
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/* Copyright (c) 2015-2018 FIRST. All Rights Reserved. */
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/* Open Source Software - may be modified and shared by FRC teams. The code */
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/* must be accompanied by the FIRST BSD license file in the root directory of */
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/* the project. */
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/*----------------------------------------------------------------------------*/
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#pragma once
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#include <cstddef>
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#include <vector>
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namespace frc {
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/**
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* This is a simple circular buffer so we don't need to "bucket brigade" copy
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* old values.
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*/
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template <class T>
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class circular_buffer {
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public:
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explicit circular_buffer(size_t size);
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using value_type = T;
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using reference = value_type&;
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using const_reference = const value_type&;
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using pointer = value_type*;
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using size_type = size_t;
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using iterator_category = std::forward_iterator_tag;
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using difference_type = std::ptrdiff_t;
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size_type size() const;
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T& front();
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const T& front() const;
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T& back();
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const T& back() const;
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void push_front(T value);
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void push_back(T value);
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T pop_front();
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T pop_back();
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void resize(size_t size);
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void reset();
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T& operator[](size_t index);
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const T& operator[](size_t index) const;
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private:
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std::vector<T> m_data;
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// Index of element at front of buffer
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size_t m_front = 0;
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// Number of elements used in buffer
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size_t m_length = 0;
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size_t ModuloInc(size_t index);
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size_t ModuloDec(size_t index);
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};
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} // namespace frc
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#include "frc/circular_buffer.inc"
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