Numeric.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 <string>
#include <stdexcept>
#include <iosfwd>
 
#include <OnixS/Eurex/MarketData/ABI.h>
 
namespace OnixS
{
    namespace Eurex
    {
        namespace MarketData
        {
            typedef char Int8;
            typedef unsigned char UInt8;
 
            typedef short Int16;
            typedef unsigned short UInt16;
 
            typedef int Int32;
            typedef unsigned int UInt32;
 
#if defined (_MSC_VER)
            typedef signed long long Int64;
            typedef unsigned long long UInt64;
#elif defined (__GNUC__)
 
#if defined (__LP64__)
            typedef signed long Int64;
            typedef unsigned long UInt64;
#else
            typedef signed long long Int64;
            typedef unsigned long long UInt64;
#endif
 
#endif
            typedef double Double;
 
            typedef Int64 DecimalMantissa;
            typedef Int32 DecimalExponent;

            class
                ONIXS_EUREX_EMDI_API
                Decimal
            {
                public:
                    Decimal (
                        DecimalMantissa mantissa = 0,
                        DecimalExponent exponent = 0);
 
                    explicit Decimal (int);

                    explicit Decimal (Double value);

                    Decimal (Double value, size_t precision);

                    Decimal (const Decimal& other);

                    DecimalMantissa mantissa() const;

                    void mantissa (DecimalMantissa);

                    DecimalExponent exponent() const;

                    void exponent (DecimalExponent);

                    bool operator == (const Decimal&) const;

                    bool operator != (const Decimal&) const;

                    operator Int32() const;

                    operator UInt32() const;

                    operator Int64() const;

                    operator UInt64() const;

                    operator Double() const;

                    bool toNumber (Int32&) const;

                    bool toNumber (UInt32&) const;

                    bool toNumber (Int64&) const;

                    bool toNumber (UInt64&) const;

                    bool toNumber (Double&) const;

                    void toString (std::string&) const;

                    std::string toString() const;

                    Decimal&
                    operator = (
                        const Decimal& other);

                    static
                    bool
                    tryParse (
                        const char* buffer,
                        size_t bufferSize,
                        Decimal&);

                    static
                    Decimal
                    parse (
                        const char* buffer,
                        size_t bufferSize);
 
                private:
                    DecimalMantissa mantissa_;

                    DecimalExponent exponent_;
            };
 
            bool operator < (const Decimal& l, const Decimal& r);
            bool operator > (const Decimal& l, const Decimal& r);
            bool operator <= (const Decimal& l, const Decimal& r);
            bool operator >= (const Decimal& l, const Decimal& r);
 
 
            inline
            DecimalMantissa
            Decimal::mantissa() const
            {
                return mantissa_;
            }
 
            inline
            void
            Decimal::mantissa (
                DecimalMantissa value)
            {
                mantissa_ = value;
            }
 
            inline
            DecimalExponent
            Decimal::exponent() const
            {
                return exponent_;
            }
 
            inline
            void
            Decimal::exponent (
                DecimalExponent value)
            {
                exponent_ = value;
            }
 
            inline
            Decimal::operator Int32() const
            {
                Int32 number;
 
                if (toNumber (number) )
                    return number;
 
                throw std::domain_error (
                    "Cannot cast value to target type. ");
            }
 
            inline
            Decimal::operator UInt32() const
            {
                UInt32 number;
 
                if (toNumber (number) )
                    return number;
 
                throw std::domain_error (
                    "Cannot cast value to target type. ");
            }
 
            inline
            Decimal::operator Int64() const
            {
                Int64 number;
 
                if (toNumber (number) )
                    return number;
 
                throw std::domain_error (
                    "Cannot cast value to target type. ");
            }
 
            inline
            Decimal::operator UInt64() const
            {
                UInt64 number;
 
                if (toNumber (number) )
                    return number;
 
                throw std::domain_error (
                    "Cannot cast value to target type. ");
            }
 
            inline
            Decimal::operator Double() const
            {
                Double number;
 
                if (toNumber (number) )
                    return number;
 
                throw std::domain_error (
                    "Cannot cast value to target type. ");
            }
 
            inline
            std::string
            Decimal::toString() const
            {
                std::string presentation;
                toString (presentation);
                return presentation;
            }

            struct ONIXS_EUREX_EMDI_API Number
            {
                static
                bool
                tryParse (
                    const char* buffer,
                    size_t bufferSize,
                    Int32& number);
 
                static
                bool
                tryParse (
                    const char* buffer,
                    size_t bufferSize,
                    UInt32& number);
 
                static
                bool
                tryParse (
                    const char* buffer,
                    size_t bufferSize,
                    Int64& number);
 
                static
                bool
                tryParse (
                    const char* buffer,
                    size_t bufferSize,
                    UInt64& number);
 
                static
                bool
                tryParse (
                    const char* buffer,
                    size_t bufferSize,
                    Double& number);
 
                static
                bool
                tryParse (
                    const char* buffer,
                    size_t bufferSize,
                    Decimal& number);
            };
        }
    }
}
 
namespace std
{
    // Outputs into standard stream.
    ONIXS_EUREX_EMDI_API
    std::ostream&
    operator <<(std::ostream&,
                const OnixS::Eurex::MarketData::Decimal&);
}