BinaryMessage.h

Go to the documentation of this file.

// 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 <OnixS/CboeCFE/Trading/BOE/Memory.h>
#include <OnixS/CboeCFE/Trading/BOE/Defines.h>
#include <OnixS/CboeCFE/Trading/BOE/String.h>
 
#include <cassert>
 
namespace OnixS
{
    namespace CboeCFE
    {
        namespace Trading
        {
            namespace BOE
            {
                template <class FieldValue>
                struct OrdinaryExtractor
                {
                    static FieldValue extract(const void* p)
                    {
                        return unalignedCopy<FieldValue>(p);
                    }
                };
 
                template<class MantissaType, class ExponentType>
                struct OrdinaryExtractor<FixedPointDecimal<MantissaType, ExponentType> >
                {
                    static FixedPointDecimal<MantissaType, ExponentType> extract(const void* p)
                    {
                        return FixedPointDecimal<MantissaType, ExponentType>(
                            unalignedCopy<typename FixedPointDecimal<MantissaType, ExponentType>::Mantissa>(p));
                    }
                };

                template <class Block, class BlockSize> 
                class BinaryFields
                {
                    const Block& block() const
                    {
                        return *static_cast<const Block*>(this);
                    }
 
                protected:
                    template <class SubMessage>
                    const SubMessage submessage(BlockSize offset, BlockSize size) const
                    {
                        assert(block().binarySize() >= (offset + size));
 
                        const void* const data = advanceByBytes(block().binary(), offset);
 
                        return SubMessage(data, size);
                    }

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

                    template <class FieldValue>
                    FieldValue ordinary(BlockSize offset) const
                    {
                        assert(block().binarySize() >= (offset + sizeof(FieldValue)));
 
                        return OrdinaryExtractor<FieldValue>::extract(advanceByBytes(block().binary(), offset));
                    }

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

                    template <BlockSize Size> 
                    StrRef fixedStr(BlockSize offset) const
                    {
                        typedef Char Str[Size];
 
                        const Str& str = ordinaryRef<Str>(offset);
 
                        return StrRef(str, strnlen(str, Size));
                    }
                };

                typedef Binary2 MessageSize;

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

                    BinaryMessage()
                        : data_(ONIXS_BATS_BOE_NULLPTR)
                        , size_(0)
                    {
                    }

                    BinaryMessage(
                        const void* data,
                        MessageSize size)
                        : data_(data)
                        , size_(size)
                    {
                        assert(ONIXS_BATS_BOE_NULLPTR != data);
                    }

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

                    operator bool() const
                    {
                        return (ONIXS_BATS_BOE_NULLPTR != data_);
                    }

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

                    MessageSize binarySize() const
                    {
                        return size_;
                    }

                    BinaryMessage&
                        operator =(
                            const BinaryMessage& other)
                    {
                        data_ = other.data_;
                        size_ = other.size_;
 
                        return *this;
                    }
                };
            }
        }
    }
}