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To construct serializer from given entities: * Data source/destination - any value that has to be serialized/deserialized, usually already existing type. * Format - functional object to define high level serialization logic to define specific format and data schema. Like order of fields, allocation. * Visitor - functional object to define low level serialization logic to operator on given data part. * BinaryWriter - copies given value into provided buffer. * BinaryReader - copies value into given destination from provided buffer. * SizeAccumulator - calculates required buffer size for given data.
62 lines
1.7 KiB
C++
62 lines
1.7 KiB
C++
#ifndef OPENMW_COMPONENTS_DETOURNAVIGATOR_SERIALIZATION_BINARYWRITER_H
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#define OPENMW_COMPONENTS_DETOURNAVIGATOR_SERIALIZATION_BINARYWRITER_H
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#include <cassert>
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#include <cstddef>
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#include <cstring>
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#include <stdexcept>
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#include <type_traits>
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namespace DetourNavigator::Serialization
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{
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struct BinaryWriter
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{
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public:
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explicit BinaryWriter(std::byte* dest, const std::byte* end)
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: mDest(dest), mEnd(end)
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{
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assert(mDest <= mEnd);
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}
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BinaryWriter(const BinaryWriter&) = delete;
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template <class Format, class T>
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void operator()(Format&& format, const T& value)
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{
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if constexpr (std::is_arithmetic_v<T>)
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{
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if (mEnd - mDest < static_cast<std::ptrdiff_t>(sizeof(value)))
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throw std::runtime_error("Not enough space");
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std::memcpy(mDest, &value, sizeof(value));
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mDest += sizeof(value);
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}
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else
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{
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format(*this, value);
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}
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}
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template <class Format, class T>
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auto operator()(Format&& format, const T* data, std::size_t count)
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{
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if constexpr (std::is_arithmetic_v<T>)
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{
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const std::size_t size = sizeof(T) * count;
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if (mEnd - mDest < static_cast<std::ptrdiff_t>(size))
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throw std::runtime_error("Not enough space");
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std::memcpy(mDest, data, size);
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mDest += size;
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}
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else
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{
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format(*this, data, count);
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}
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}
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private:
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std::byte* mDest;
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const std::byte* const mEnd;
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};
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}
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#endif
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