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/SURF/MarketData/Export.h>

#include <iosfwd>
#include <string>

namespace OnixS { namespace SURF { namespace MarketData {

///
/// Decimal representation.
///
struct ONIXS_TP_SURF_EXPORT Decimal
{
    Decimal();

    Decimal(signed char);
    Decimal(unsigned char);

    Decimal(signed short);
    Decimal(unsigned short);

    Decimal(signed int);
    Decimal(unsigned int);

    Decimal(signed long long);
    Decimal(unsigned long long);

    Decimal(float value, size_t precision);

    Decimal(signed long long mantissa, signed int exponent);

    Decimal(
        signed char sign,
        unsigned long long mantissaHigh,
        unsigned long long mantissaLow,
        signed int exponent
    );

    Decimal(const std::string&);
    Decimal(const char* buffer, size_t bufferSize);

    Decimal(const Decimal& other);

    signed long long mantissa() const;
    void mantissa(signed long long);

    signed int exponent() const;
    void exponent(signed int);

    bool toNumber(signed char& converted) const;
    bool toNumber(unsigned char& converted) const;

    bool toNumber(signed short& converted) const;
    bool toNumber(unsigned short& converted) const;

    bool toNumber(signed int& converted) const;
    bool toNumber(unsigned int& converted) const;

    bool toNumber(signed long long& converted) const;
    bool toNumber(unsigned long long& converted) const;

    bool toNumber(float& converted) const;
    bool toNumber(double& converted) const;

    operator signed int() const;
    operator unsigned int() const;
    operator signed long long() const;
    operator unsigned long long() const;
    operator double() const;

    bool operator==(const Decimal& other) const;
    bool operator!=(const Decimal& other) const;

    Decimal& operator=(const Decimal& other);

    Decimal& operator+=(const Decimal& other);
    Decimal& operator-=(const Decimal& other);

    Decimal& operator*=(const Decimal& other);
    Decimal& operator/=(const Decimal& other);

    std::string toString() const;

private:
    void unpack(
        signed char* sign,
        unsigned long long* mantissaHigh,
        unsigned long long* mantissaLow,
        signed int* exponent
    ) const;

private:
    unsigned char bytes[16];
};

ONIXS_TP_SURF_EXPORT Decimal operator+(Decimal);
ONIXS_TP_SURF_EXPORT Decimal operator-(Decimal);

ONIXS_TP_SURF_EXPORT Decimal operator+(Decimal, Decimal);
ONIXS_TP_SURF_EXPORT Decimal operator-(Decimal, Decimal);

ONIXS_TP_SURF_EXPORT Decimal operator*(Decimal, Decimal);
ONIXS_TP_SURF_EXPORT Decimal operator/(Decimal, Decimal);

ONIXS_TP_SURF_EXPORT bool operator<(Decimal, Decimal);
ONIXS_TP_SURF_EXPORT bool operator>(Decimal, Decimal);

ONIXS_TP_SURF_EXPORT bool operator<=(Decimal, Decimal);
ONIXS_TP_SURF_EXPORT bool operator>=(Decimal, Decimal);

ONIXS_TP_SURF_EXPORT std::ostream& operator<<(std::ostream&, const Decimal&);

}}} // namespace OnixS::SURF::MarketData