ByteStream.h

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/*
 * This file is a part of the Biology project by eons LLC.
 * Biology (aka Develop Biology) is a framework for approaching software
 * development from a natural sciences perspective.
 *
 * Copyright (C) 2021 Séon O'Shannon & eons LLC
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
#pragma once
 
#include "bio/common/macros/AssertMacros.h"
#include "TypeName.h"
#include <cstddef>
#include <cstdlib>
#include <cstring>
 
namespace bio {
 
class ByteStream
{
public:
    ByteStream();
 
    template < typename T >
    ByteStream(T in)
    {
        Set(in);
    }
 
    ByteStream(const ByteStream& other);
 
    ~ByteStream();
 
    void operator=(const ByteStream& other);
 
    bool operator==(const ByteStream& other) const;
 
    template < typename T >
    T As()
    {
        BIO_ASSERT(Is< T >());
        T* ret;
        std::memcpy(
            ret,
            m_stream,
            sizeof(T));
        return *ret;
    }
 
    template < typename T >
    const T As() const
    {
        BIO_ASSERT(Is< T >());
        T* ret;
        std::memcpy(
            ret,
            m_stream,
            sizeof(T));
        return *ret;
    }
 
    template < typename T >
    operator T()
    {
        return As< T >();
    }
 
    template < typename T >
    operator const T() const
    {
        return As< T >();
    }
 
    template < typename T >
    void Set(T in)
    {
        m_stream = std::malloc(sizeof(T));
        std::memcpy(
            m_stream,
            &in,
            sizeof(T));
        m_size = sizeof(T);
        m_typeName = TypeName< T >();
    }
 
    void Set(const ByteStream& other);
 
    void Release();
 
    bool IsEmpty() const;
 
    template < typename T >
    bool Is() const
    {
        return sizeof(T) == m_size && TypeName< T >() == m_typeName;
    }
 
    template < typename T >
    bool Is(const T& t) const
    {
        return Is< T >();
    }
 
    std::string GetTypeName() const;
 
    std::size_t GetSize() const;
 
    void* IKnowWhatImDoing();
 
protected:
    void* m_stream;
    std::string m_typeName;
    std::size_t m_size;
    bool m_holding;
};
} //bio namespace