/***
    Copyright (C) 2021 J Reece Wilson (a/k/a "Reece"). All rights reserved.

    File: AuHashStream.hpp
    Date: 2021-6-12
    Author: Reece
***/
#pragma once

namespace Aurora::Hashing
{
#pragma pack(push)
#pragma pack(4)
    struct HashStreamImpl : IHashStream
    {
        HashStreamImpl(EHashType type);

        void Ingest(const Memory::MemoryViewRead &input) override;

        AuUInt8 const *GetBytes(AuUInt32 &length) override;

        Memory::MemoryViewRead Finalize() override;
        Memory::MemoryViewRead PeekFinalize() override;

        AuResult<Memory::MemoryViewRead> Export() override;
        
        bool Import(const Memory::MemoryViewRead &view) override;

        void Reset() override;

        void Init();
    private:
        EHashType type_ {};
        bool bFinished_ {};
        AuUInt8 buffer_[64] {};
        union
        {
            hash_state state_ {};
            char altBuffer_[432];
        };
    };
#pragma pack(pop)
}