Decimal.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 <OnixS/CME/iLink3/messaging/Integral.h>
#include <OnixS/CME/iLink3/messaging/Memory.h>
 
#include <string>
 
ONIXS_ILINK3_MESSAGING_NAMESPACE_BEGIN

template <class MantissaType, class ExponentType> class FixedPointDecimal;
template <class MantissaType, class ExponentType> class FloatingPointDecimal;
template<class Mantissa, class Exponent> std::string toStr(const FixedPointDecimal <Mantissa, Exponent>&);
template<class Mantissa, class Exponent> std::string toStr(const FloatingPointDecimal <Mantissa, Exponent>&);

template <class MantissaType, class ExponentType >
class FloatingPointDecimal
{
    MantissaType mantissa_;
    ExponentType exponent_;
 
public:
    struct MemberTraits
    {
        enum { Count = 2 };
 
        typedef MantissaType FirstArgType;
 
        typedef ExponentType SecondArgType;
    };

    typedef MantissaType Mantissa;

    typedef ExponentType Exponent;

    enum
    {
        Size = sizeof(Mantissa) + sizeof(Exponent)
    };

    ONIXS_ILINK3_NODISCARD
    std::string toString() const
    {
        return toStr(*this);
    }

    ONIXS_ILINK3_CONSTEXPR
    FloatingPointDecimal() ONIXS_ILINK3_NOTHROW
        : mantissa_()
        , exponent_()
    {
    }

    ONIXS_ILINK3_CONSTEXPR
    FloatingPointDecimal(Mantissa mantissa, Exponent exponent) ONIXS_ILINK3_NOTHROW
        : mantissa_(mantissa)
        , exponent_(exponent)
    {
    }

    ONIXS_ILINK3_CONSTEXPR
    FloatingPointDecimal(
        const FloatingPointDecimal& other) ONIXS_ILINK3_NOTHROW
        : mantissa_(other.mantissa_)
        , exponent_(other.exponent_)
    {
    }

    Mantissa mantissa() const ONIXS_ILINK3_NOTHROW
    {
        return mantissa_;
    }

    Exponent exponent() const ONIXS_ILINK3_NOTHROW
    {
        return exponent_;
    }

    FloatingPointDecimal& operator =(const FloatingPointDecimal& other) ONIXS_ILINK3_NOTHROW
    {
        mantissa_ = other.mantissa_;
        exponent_ = other.exponent_;
 
        return *this;
    }
 

    template<class OtherMantissa, class OtherExponent>
    explicit FloatingPointDecimal(const FloatingPointDecimal <OtherMantissa, OtherExponent>& other) ONIXS_ILINK3_NOTHROW
        : mantissa_(other.mantissa())
        , exponent_(other.exponent())
    {
    }

    template <class OtherMantissa, class OtherExponent>
    explicit FloatingPointDecimal(const FixedPointDecimal <OtherMantissa, OtherExponent>& other) ONIXS_ILINK3_NOTHROW
        : mantissa_(other.mantissa())
        , exponent_(other.exponent())
    {
    }

    template
        <
            class OtherMantissa,
            class OtherExponent
        >
    FloatingPointDecimal&
    operator =(
        const FloatingPointDecimal
            <OtherMantissa, OtherExponent>& other) ONIXS_ILINK3_NOTHROW
    {
        mantissa_ = other.mantissa();
        exponent_ = other.exponent();
 
        return *this;
    }

    template
        <
            class OtherMantissa,
            class OtherExponent
        >
    FloatingPointDecimal& operator = (const FixedPointDecimal <OtherMantissa, OtherExponent>& other) ONIXS_ILINK3_NOTHROW
    {
        mantissa_ = other.mantissa();
        exponent_ = other.exponent();
 
        return *this;
    }

    void serialize(void* addr) const ONIXS_ILINK3_NOTHROW
    {
        assert(addr);
 
        std::memcpy(addr, &mantissa_, sizeof(mantissa_));
        addr = advanceByBytes(addr, sizeof(mantissa_));
 
        std::memcpy(addr, &exponent_, sizeof(exponent_));
    }
};

template
<
    class MantissaType,
    class ExponentType
>
class FixedPointDecimal
{
    // Only mantissa is stored.
    MantissaType mantissa_;
 
public:
    struct MemberTraits
    {
        enum { Count = 1 };
 
        typedef MantissaType FirstArgType;
    };

    typedef MantissaType Mantissa;

    typedef ExponentType Exponent;

    enum
    {
        Size = sizeof(Mantissa)
    };

    ONIXS_ILINK3_NODISCARD
    std::string toString() const
    {
        return toStr(*this);
    }

    ONIXS_ILINK3_CONSTEXPR
    FixedPointDecimal() ONIXS_ILINK3_NOTHROW
        : mantissa_()
    {
    }

    explicit ONIXS_ILINK3_CONSTEXPR FixedPointDecimal(Mantissa mantissa) ONIXS_ILINK3_NOTHROW
        : mantissa_(mantissa)
    {
    }

    ONIXS_ILINK3_CONSTEXPR FixedPointDecimal(const FixedPointDecimal& other) ONIXS_ILINK3_NOTHROW
        : mantissa_(other.mantissa_)
    {
    }

    Mantissa mantissa() const ONIXS_ILINK3_NOTHROW
    {
        return mantissa_;
    }

    Exponent exponent() const ONIXS_ILINK3_NOTHROW
    {
        return Exponent();
    }

    FixedPointDecimal& operator = (const FixedPointDecimal& other) ONIXS_ILINK3_NOTHROW
    {
        mantissa_ = other.mantissa_;
 
        return *this;
    }

    void serialize(void* addr) const ONIXS_ILINK3_NOTHROW
    {
        assert(addr);
 
        std::memcpy(addr, &mantissa_, sizeof(mantissa_));
    }
};
 
ONIXS_ILINK3_MESSAGING_NAMESPACE_END