mirror of
https://github.com/OpenRCT2/OpenRCT2
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d46e4a9bb1
* Start a network serialiser for entities will be used only for checksums and replay diffs * Continue work * Use the new serailser for checksums * Use new serialiser for replays * keep compilers happy * Try create checksum stream * Fix compiling * Split off class into seperate file * Update Xcode project * Increment network version * Fix pragma mistake * Fix none network builds * Update replays * Improve ChecksumStream and use FNV internally * Small cleanups * satisfy compilers * Revert change of checksum size to simplfy rerecording * Zero initialise data * Fix serialiser * Update replays again Co-authored-by: Michael Steenbeek <m.o.steenbeek@gmail.com> Co-authored-by: Matt <m.moninger.h@gmail.com>
111 lines
2.6 KiB
C++
111 lines
2.6 KiB
C++
/*****************************************************************************
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* Copyright (c) 2014-2021 OpenRCT2 developers
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*
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* For a complete list of all authors, please refer to contributors.md
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* Interested in contributing? Visit https://github.com/OpenRCT2/OpenRCT2
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*
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* OpenRCT2 is licensed under the GNU General Public License version 3.
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*****************************************************************************/
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#pragma once
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#include "../common.h"
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#include "IStream.hpp"
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namespace OpenRCT2
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{
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/**
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* A stream for checksumming a stream of data
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*/
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class ChecksumStream final : public IStream
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{
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// FIXME: Move the checksum implementation out.
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std::array<std::byte, 20>& _checksum;
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static constexpr uint64_t Seed = 0xcbf29ce484222325ULL;
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static constexpr uint64_t Prime = 0x00000100000001B3ULL;
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public:
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ChecksumStream(std::array<std::byte, 20>& buf);
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virtual ~ChecksumStream() = default;
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const void* GetData() const override
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{
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return _checksum.data();
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};
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///////////////////////////////////////////////////////////////////////////
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// ISteam methods
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///////////////////////////////////////////////////////////////////////////
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bool CanRead() const override
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{
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return false;
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}
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bool CanWrite() const override
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{
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return true;
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}
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uint64_t GetLength() const override
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{
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return _checksum.size();
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}
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uint64_t GetPosition() const override
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{
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return 0;
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}
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void SetPosition(uint64_t position) override
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{
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}
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void Seek(int64_t offset, int32_t origin) override
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{
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}
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void Read(void* buffer, uint64_t length) override
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{
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}
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void Write(const void* buffer, uint64_t length) override;
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void Write1(const void* buffer) override
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{
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Write<1>(buffer);
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}
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void Write2(const void* buffer) override
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{
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Write<2>(buffer);
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}
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void Write4(const void* buffer) override
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{
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Write<4>(buffer);
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}
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void Write8(const void* buffer) override
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{
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Write<8>(buffer);
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}
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void Write16(const void* buffer) override
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{
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Write<16>(buffer);
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}
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template<size_t N> void Write(const void* buffer)
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{
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Write(buffer, N);
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}
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uint64_t TryRead(void* buffer, uint64_t length) override
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{
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return 0;
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}
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};
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} // namespace OpenRCT2
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