AuroraRuntime/Include/Aurora/IO/IStreamReader.hpp

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

    File: IStreamReader.hpp
    Date: 2021-6-10
    Author: Reece
***/
#pragma once

namespace Aurora::IO
{
    class IStreamReader
    {
    public:
        virtual EStreamError Open() = 0;
        virtual EStreamError Read(const Memory::MemoryViewStreamWrite &paramters) = 0;
        virtual void         Close() = 0;

        EStreamError ReadAll(Memory::ByteBuffer &buffer)
        {
            static const int kBufferSize = 2048;
            
            AuUInt len;
            EStreamError ret;
            AuUInt8 temp[kBufferSize];

            len = kBufferSize;
            ret = EStreamError::eErrorEndOfStream;

            buffer = Memory::NewResizableBuffer();

            while ((ret = Read(Memory::MemoryViewStreamWrite(temp, len))) == EStreamError::eErrorNone)
            {
                if (len == 0)
                {
                    break;
                }

                buffer.Write(temp, len);

                if (len != kBufferSize)
                {
                    break;
                }
            }

            if (ret == EStreamError::eErrorEndOfStream)
            {
                return EStreamError::eErrorNone;
            }

            return ret;
        }
    };
}