circularbuffer: Add circular buffer utility struct

This commit is contained in:
Finlay Davidson 2023-03-17 22:14:19 +01:00 committed by JF
parent cf782bb615
commit 6d5847e046

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@ -0,0 +1,51 @@
#pragma once
#include <array>
#include <cstddef>
namespace Pinetime {
namespace Utility {
template <class T, size_t S>
struct CircularBuffer {
constexpr size_t Size() const {
return S;
}
size_t Idx() const {
return idx;
}
T& operator[](size_t n) {
return data[(idx + n) % S];
}
const T& operator[](size_t n) const {
return data[(idx + n) % S];
}
void operator++() {
idx++;
idx %= S;
}
void operator++(int) {
operator++();
}
void operator--() {
if (idx > 0) {
idx--;
} else {
idx = S - 1;
}
}
void operator--(int) {
operator--();
}
std::array<T, S> data;
size_t idx = 0;
};
}
}