66 lines
1.4 KiB
C++
66 lines
1.4 KiB
C++
#pragma once
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/**
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* \file VarInt.h
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* \brief File containing the sp::VarInt class
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*/
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#include <cstddef>
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#include <cstdint>
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#include <functional>
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namespace sp {
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class DataBuffer;
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using ReadFunc = std::function<void(std::uint8_t&)>;
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/**
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* \class VarInt
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* \brief Variable-length format such that smaller numbers use fewer bytes.
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*/
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class VarInt {
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private:
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std::uint64_t m_Value;
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public:
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static const std::uint64_t MAX_VALUE = static_cast<std::uint64_t>(-1) >> 8;
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VarInt() : m_Value(0) {}
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/**
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* \brief Construct a variable integer from a value
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* \param value The value of the variable integer
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*/
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VarInt(std::uint64_t value) : m_Value(value) {}
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/**
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* \brief Get the value of the variable integer
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*/
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std::uint64_t GetValue() const {
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return m_Value;
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}
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/**
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* \brief Get the length of the serialized variable integer
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*/
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std::size_t GetSerializedLength() const;
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/**
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* \brief Serialize the variable integer
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* \param out The buffer to write the serialized variable integer to
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* \param var The variable integer to serialize
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*/
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friend DataBuffer& operator<<(DataBuffer& out, const VarInt& var);
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/**
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* \brief Deserialize the variable integer
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* \param in The buffer to read the serialized variable integer from
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* \param var The variable integer to deserialize
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*/
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friend DataBuffer& operator>>(DataBuffer& in, VarInt& var);
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void Read(const ReadFunc& read);
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};
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} // namespace sp
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