BinaryMessage.h

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// Copyright Onix Solutions Limited [OnixS]. All rights reserved.
//
// This software owned by Onix Solutions Limited [OnixS] and is 
// protected by copyright law and international copyright treaties.
//
// Access to and use of the software is governed by the terms of the applicable 
// OnixS Software Services Agreement (the Agreement) and Customer end user license 
// agreements granting a non-assignable, non-transferable and non-exclusive license 
// to use the software for it's own data processing purposes under the terms defined 
// in the Agreement.
//
// Except as otherwise granted within the terms of the Agreement, copying or 
// reproduction of any part of this source code or associated reference material 
// to any other location for further reproduction or redistribution, and any 
// amendments to this copyright notice, are expressly prohibited.
//
// Any reproduction or redistribution for sale or hiring of the Software not in 
// accordance with the terms of the Agreement is a violation of copyright law.
//
#pragma once
 
#include <cassert>
 
#include <OnixS/eSpeed/MarketData/Itch/Compiler.h>
#include <OnixS/eSpeed/MarketData/Itch/Defines.h>
#include <OnixS/eSpeed/MarketData/Itch/String.h>
 
ONIXS_ESPEED_ITCH_NAMESPACE_BEGIN
 

 
template <template<class> class Block, class FieldAccessor>
class BinaryFields
{
    typedef MessageSize BlockSize;

    const Block<FieldAccessor>& block() const
    ONIXS_ESPEED_ITCH_NOTHROW
    {
        return *static_cast<const Block<FieldAccessor>*>(this);
    }
 
protected:
    template <class FieldValue>
    FieldValue ordinary(BlockSize offset) const
    ONIXS_ESPEED_ITCH_NOTHROW
    {
        assert(block().binarySize() >= (offset + sizeof(FieldValue)));
 
        return FieldAccessor::get(FieldValue(), advanceByBytes(block().binary(), offset));
    }

    template <class FieldValue>
    const FieldValue& ordinaryRef(BlockSize offset) const
    ONIXS_ESPEED_ITCH_NOTHROW
    {
        assert(block().binarySize() >= (offset + sizeof(FieldValue)));
 
        return *static_cast <const FieldValue*>(advanceByBytes(block().binary(), offset));
    }

    template <class Enumeration>
    typename Enumeration::Enum enumeration(BlockSize offset) const
    ONIXS_ESPEED_ITCH_NOTHROW
    {
        typedef typename Enumeration::Base Base;
 
        typedef typename Enumeration::Enum Enum;
 
        return static_cast<Enum>(ordinaryRef<Base>(offset));
    }

    template <BlockSize Size>
    StrRef fixedStr(BlockSize offset) const
    ONIXS_ESPEED_ITCH_NOTHROW
    {
        typedef Char Str[Size];
 
        assert(block().binarySize() >= (offset + Size));
 
        return
            StrRef(ordinaryRef<Str>(offset), strnlen(ordinaryRef<Str>(offset), Size));
    }
};

template <class Accessor>
class BinaryMessage
    : public BinaryFields<BinaryMessage, Accessor>
{
    const void* data_;
    MessageSize size_;
 
public:
    typedef MessageSize BinarySize;

    BinaryMessage(
        const void* data,
        MessageSize size)
    ONIXS_ESPEED_ITCH_NOTHROW
        : data_(data)
        , size_(size)
    {
    }

    ONIXS_ESPEED_ITCH_CONSTEXPR
    BinaryMessage(
        const BinaryMessage& other)
    ONIXS_ESPEED_ITCH_NOTHROW
        : data_(other.data_)
        , size_(other.size_)
    {
    }

    const void* binary() const
    ONIXS_ESPEED_ITCH_NOTHROW
    {
        return data_;
    }

    MessageSize binarySize() const
    ONIXS_ESPEED_ITCH_NOTHROW
    {
        return size_;
    }

    BinaryMessage&
        operator =(
            const BinaryMessage& other)
    ONIXS_ESPEED_ITCH_NOTHROW
    {
        data_ = other.data_;
        size_ = other.size_;
 
        return *this;
    }
 
#if defined(ONIXS_ESPEED_ITCH_COMPILER_CXX_RVALUE_REFERENCES) && ONIXS_ESPEED_ITCH_COMPILER_CXX_RVALUE_REFERENCES
 
    BinaryMessage(BinaryMessage&& other)
    ONIXS_ESPEED_ITCH_NOTHROW
        : data_(std::move(other.data_))
        , size_(std::move(other.size_))
    {
    }
 
    BinaryMessage&
        operator=(
                BinaryMessage&& other)
    ONIXS_ESPEED_ITCH_NOTHROW
    {
        if (this == &other)
            return *this;
 
        data_ = std::move(other.data_);
        size_ = std::move(other.size_);
 
        return *this;
    }
    
#endif
};
 
ONIXS_ESPEED_ITCH_API
void throwIncorrectSize(const std::string& messageName, MessageSize receivedSize, MessageSize expectedSize);
 
 
ONIXS_ESPEED_ITCH_NAMESPACE_END