Time.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>
 
#if defined(__linux__)
#  include <sys/time.h>
#  include <unistd.h>
#endif
 
namespace OnixS { namespace SURF { namespace MarketData {
 
#if defined(_WIN32)
 
typedef unsigned __int64 AbsoluteHighResolutionTimeImpl;
 
typedef __int64 RelativeHighResolutionTimeImpl;
 
#elif defined(__linux__)
 
typedef timeval AbsoluteHighResolutionTimeImpl;
 
typedef struct Nothing
{
} RelativeHighResolutionTimeImpl;
 
#else
 
#  error High resolution time services are not defined for a given platform.
 
#endif
 
struct ONIXS_TP_SURF_EXPORT HighResolutionTimeFields
{
    unsigned short year;
    unsigned short month;
    unsigned short day;
 
    unsigned short hour;
    unsigned short minute;
    unsigned short seconds;
 
    unsigned int microseconds;

    HighResolutionTimeFields();

    void fromAbsolute(const AbsoluteHighResolutionTimeImpl&);

    void toAbsolute(AbsoluteHighResolutionTimeImpl*) const;

    void fromString(const std::string&);

    std::string toString() const;
};
 
typedef long long HighResolutionTimeSpan;

class ONIXS_TP_SURF_EXPORT HighResolutionTime
{
public:
    HighResolutionTime();

    HighResolutionTime(long long);

    HighResolutionTime(const HighResolutionTimeFields&);

    HighResolutionTime(const HighResolutionTime&);

    bool isValid() const;

    void getFields(HighResolutionTimeFields* fields) const;

    std::string toString() const;

    void setToNow();

    bool operator==(const HighResolutionTime&) const;

    bool operator!=(const HighResolutionTime&) const;

    HighResolutionTimeSpan operator-(const HighResolutionTime&) const;

    HighResolutionTime& operator=(const HighResolutionTime&);

    static HighResolutionTime now();

    static HighResolutionTime parse(const std::string& time);
 
private:
    enum ValueKind
    {
        Invalid,
        Absolute,
        Relative
    };
 
    union Value
    {
        AbsoluteHighResolutionTimeImpl asAbsolute;
        RelativeHighResolutionTimeImpl asRelative;
    };
 
    Value value_;
    ValueKind kind_;
 
    HighResolutionTime(ValueKind kind);
};
 
inline bool HighResolutionTime::isValid() const
{
    return !(Invalid == kind_);
}
 
ONIXS_TP_SURF_EXPORT std::ostream& operator<<(std::ostream&, const HighResolutionTime&);
 
}}} // namespace OnixS::SURF::MarketData