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#pragma once
#include <array>
#include <cstdint>
#include <limits>
namespace base
{
class MoveToFront
{
public:
static size_t constexpr kNumBytes = static_cast<size_t>(std::numeric_limits<uint8_t>::max()) + 1;
MoveToFront();
// Returns index of the byte |b| in the current sequence of bytes, then, moves |b|
// to the first positions.
uint8_t Transform(uint8_t b);
uint8_t operator[](uint8_t i) const { return m_order[i]; }
private:
std::array<uint8_t, kNumBytes> m_order;
};
} // namespace
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