Time.h

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// Copyright Onix Solutions Limited [OnixS]. All rights reserved.
//
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// protected by copyright law and international copyright treaties.
//
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// 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 <algorithm>
#include <stdexcept>
 
#include <OnixS/CME/Streamlined/String.h>
#include <OnixS/CME/Streamlined/Integral.h>
 
ONIXS_CMESTREAMLINEDMDH_NAMESPACE_BEGIN
ONIXS_CMESTREAMLINEDMDH_DATA_PACKING_BEGIN(1)
 

ONIXS_CMESTREAMLINEDMDH_LTWT_STRUCT TimeTraits
{
    static Int64 nanosecondsPerDay()
    {
        return 86400000000000ll;
    }
        
    static Int64 nanosecondsPerHour()
    {
        return 3600000000000ll;
    }

    static Int64 nanosecondsPerMinute()
    {
        return 60000000000ll;
    }

    static Int32 nanosecondsPerSecond()
    {
        return 1000000000;
    }

    static Int32 nanosecondsPerMillisecond()
    {
        return 1000000;
    }

    static Int32 nanosecondsPerMicrosecond()
    {
        return 1000;
    }

    static Int32 hoursPerDay()
    {
        return 24;
    }

    static Int32 minutesPerHour()
    {
        return 60;
    }

    static Int32 secondsPerMinute()
    {
        return 60;
    }
        
    static Int32 millisecondsPerSecond()
    {
        return 1000;
    }
        
    static Int32 microsecondsPerSecond()
    {
        return 1000000;
    }
};

ONIXS_CMESTREAMLINEDMDH_LTWT_CLASS TimeSpan
{
public:
    typedef Int64 Ticks;

    typedef Int32 Days;
    
    typedef Int32 Hours;

    typedef Int32 Minutes;

    typedef Int32 Seconds;
    
    typedef Int32 Milliseconds;

    typedef Int32 Microseconds;

    typedef Int32 Nanoseconds;

    explicit TimeSpan(Ticks ticks = 0)
        : ticks_(ticks)
    {
    }

    TimeSpan(
        Days days, 
        Hours hours, 
        Minutes minutes, 
        Seconds seconds, 
        Nanoseconds nanoseconds)
        : ticks_(
            static_cast<Ticks>(days) *
            TimeTraits::nanosecondsPerDay() +
            static_cast<Ticks>(hours) * 
            TimeTraits::nanosecondsPerHour() + 
            static_cast<Ticks>(minutes) *
            TimeTraits::nanosecondsPerMinute() + 
            static_cast<Ticks>(seconds) *
            TimeTraits::nanosecondsPerSecond() +
            nanoseconds)
    {
    }

    TimeSpan(
        Hours hours, 
        Minutes minutes, 
        Seconds seconds, 
        Nanoseconds nanoseconds)
        : ticks_(
            static_cast<Ticks>(hours) * 
            TimeTraits::nanosecondsPerHour() + 
            static_cast<Ticks>(minutes) *
            TimeTraits::nanosecondsPerMinute() + 
            static_cast<Ticks>(seconds) *
            TimeTraits::nanosecondsPerSecond() +
            nanoseconds)
    {
    }

    Days days() const
    {
        return 
            static_cast<Days>
            (ticks_ / 
                TimeTraits::nanosecondsPerDay());
    }

    Hours hours() const
    {
        return 
            static_cast<Hours>(
                (ticks_ / 
                    TimeTraits::nanosecondsPerHour()) % 
                TimeTraits::hoursPerDay()
            );
    }

    Int32 minutes() const
    {
        return 
            static_cast<Minutes>(
                (ticks_ / 
                    TimeTraits::nanosecondsPerMinute()) % 
                TimeTraits::minutesPerHour()
            );
    }

    Int32 seconds() const
    {
        return 
            static_cast<Seconds>(
                (ticks_ / 
                    TimeTraits::nanosecondsPerSecond()) %
                TimeTraits::secondsPerMinute()
            );
    }

    Milliseconds milliseconds() const
    {
        return 
            static_cast<Milliseconds>
                ((ticks_ / 
                    TimeTraits::nanosecondsPerMillisecond()) %
                TimeTraits::millisecondsPerSecond()
            );
    }

    Microseconds microseconds() const
    {
        return 
            static_cast<Microseconds>
                ((ticks_ / 
                    TimeTraits::nanosecondsPerMicrosecond()) %
                TimeTraits::microsecondsPerSecond()
            );
    }

    Nanoseconds nanoseconds() const
    {
        return 
            static_cast<Nanoseconds>
            (ticks_ % 
                TimeTraits::nanosecondsPerSecond());
    }

    Ticks ticks() const
    {
        return ticks_;
    }

    TimeSpan& 
    operator +=(
        const TimeSpan& other)
    {
        ticks_ += other.ticks_;
 
        return *this;
    }

    TimeSpan& 
    operator -=(
        const TimeSpan& other)
    {
        ticks_ -= other.ticks_;
 
        return *this;
    }

    void
    swap(TimeSpan& other)
    {
        std::swap(ticks_, other.ticks_);
    }
 
private:
    Ticks ticks_;
};

inline 
bool 
operator ==(
    const TimeSpan& left,
    const TimeSpan& right)
{
    return left.ticks() == right.ticks();
}

inline 
bool 
operator !=(
    const TimeSpan& left,
    const TimeSpan& right)
{
    return left.ticks() != right.ticks();
}

inline 
bool 
operator <(
    const TimeSpan& left,
    const TimeSpan& right)
{
    return left.ticks() < right.ticks();
}

inline 
bool 
operator >(
    const TimeSpan& left,
    const TimeSpan& right)
{
    return left.ticks() > right.ticks();
}
 
// TimeSpan serialization.
 
// Serializes timespan according to HH:MM:SS pattern.
ONIXS_CMESTREAMLINEDMDH_EXPORTED
void
toStrAsHHMMSS(std::string&, TimeSpan);
 
// Serializes timespan according to HH:MM:SS.sss pattern.
ONIXS_CMESTREAMLINEDMDH_EXPORTED
void
toStrAsHHMMSSmsec(std::string&, TimeSpan);
 
// Serializes timespan according to D.HH:MM:SS.sssssssss pattern.
ONIXS_CMESTREAMLINEDMDH_EXPORTED
void
toStrAsSDHHMMSSnsec(std::string&, TimeSpan);

ONIXS_CMESTREAMLINEDMDH_LTWT_STRUCT TimeSpanFormat
{
    enum Enum
    {
        HHMMSS,

        HHMMSSmsec,

        SDHHMMSSnsec
    };
};

inline 
void
toStr(
    std::string& str, 
    TimeSpan timeSpan, 
    TimeSpanFormat::Enum format = 
        TimeSpanFormat::SDHHMMSSnsec)
{
    switch (format)
    {
    case TimeSpanFormat::HHMMSS:
        toStrAsHHMMSS(str, timeSpan);
        break;
 
    case TimeSpanFormat::HHMMSSmsec:
        toStrAsHHMMSSmsec(str, timeSpan);
        break;
 
    case TimeSpanFormat::SDHHMMSSnsec:
        toStrAsSDHHMMSSnsec(str, timeSpan);
        break;
 
    default:
        {
            throw std::invalid_argument(
                "Unknown timespan format pattern specified. ");
        }
    }
}

inline 
std::string
toStr(
    TimeSpan timeSpan, 
    TimeSpanFormat::Enum format = 
        TimeSpanFormat::SDHHMMSSnsec)
{
    std::string str;
 
    toStr(str, timeSpan, format);
 
    return str;
}

ONIXS_CMESTREAMLINEDMDH_LTWT_STRUCT Month
{
    enum Enum
    { 
        January = 1,
        February,
        March,
        April,
        May,
        June,
        July,
        August,
        September,
        October,
        November,
        December
    };
};

ONIXS_CMESTREAMLINEDMDH_LTWT_CLASS Timestamp
{
public:
    typedef UInt64 Ticks;

    typedef UInt32 Year;
    
    typedef 
    OnixS::CME::Streamlined::MDH::Month::Enum 
    Month;

    typedef UInt32 Day;
    
    typedef UInt32 Hour;

    typedef UInt32 Minute;

    typedef UInt32 Second;
    
    typedef UInt32 Millisecond;

    typedef UInt32 Microsecond;

    typedef UInt32 Nanosecond;

    explicit Timestamp(Ticks ticks = 0)
        : sinceEpoch_(ticks)
    {
    }

    Timestamp(
        Year year,
        Month month,
        Day day,
        Hour hour = 0,
        Minute minute = 0,
        Second second = 0,
        Nanosecond nanosecond = 0)
        : sinceEpoch_(
            toTicks(
                year, month, day, 
                hour, minute, second, nanosecond)
        )
    {
    }

    Timestamp(
        const Timestamp& other)
        : sinceEpoch_(other.sinceEpoch_)
    {
    }

    Year year() const
    {
        Year year; Month month; Day day;
        
        toDate(sinceEpoch_, year, month, day);
        
        return year;
    }

    Month month() const
    {
        Year year; Month month; Day day;
        
        toDate(sinceEpoch_, year, month, day);
        
        return month;
    }

    Day day() const
    {
        Year year; Month month; Day day;
        
        toDate(sinceEpoch_, year, month, day);
        
        return day;
    }
                
    Hour hour() const
    {
        return static_cast<Hour>(time().hours());
    }

    Minute minute() const
    {
        return static_cast<Minute>(time().minutes());
    }

    Second second() const
    {
        return static_cast<Second>(time().seconds());
    }

    Millisecond millisecond() const
    {
        return static_cast<Millisecond>(time().milliseconds());
    }

    Microsecond microsecond() const
    {
        return static_cast<Microsecond>(time().microseconds());
    }

    Nanosecond nanosecond() const
    {
        return static_cast<Nanosecond>(time().nanoseconds());
    }

    Timestamp date() const
    {
        return 
            Timestamp(
                sinceEpoch_ - 
                    sinceEpoch_ % 
                    TimeTraits::nanosecondsPerDay());
    }

    TimeSpan time() const
    {
        return 
            TimeSpan(
                sinceEpoch_ % 
                TimeTraits::nanosecondsPerDay());
    }

    Ticks sinceEpoch() const
    {
        return sinceEpoch_;
    }

    Timestamp& 
    operator =(
        const Timestamp& other)
    {
        sinceEpoch_ = other.sinceEpoch_;
 
        return *this;
    }

    void
    swap(
        Timestamp& other)
    {
        std::swap(
            sinceEpoch_, 
            other.sinceEpoch_);
    }
 
private:
    // Time interval in nanoseconds since the 01-01-1970.
    Ticks sinceEpoch_;
 
    // Converts structured date-time into ticks. 
    ONIXS_CMESTREAMLINEDMDH_LTWT_EXPORTED
    static
    Ticks
    toTicks(
        Year, Month, Day, 
        Hour, Minute, Second, 
        Nanosecond);
 
    // Extracts date components from ticks. 
    ONIXS_CMESTREAMLINEDMDH_LTWT_EXPORTED
    static
    void
    toDate(
        Ticks, 
        Year&, Month&, Day&);
};

inline 
bool 
operator ==(
    const Timestamp& left,
    const Timestamp& right)
{
    return left.sinceEpoch() == right.sinceEpoch();
}

inline 
bool 
operator !=(
    const Timestamp& left,
    const Timestamp& right)
{
    return left.sinceEpoch() != right.sinceEpoch();
}

template
<
    UInt64 Value
>
inline
bool
operator !=(
    const Timestamp& left,
    const IntegralConstant<UInt64, Value>& right)
{
    return left.sinceEpoch() != right.value();
}
 
template
<
    UInt64 Value
>
inline
bool
operator !=(
    const IntegralConstant<UInt64, Value>& left,
    const Timestamp& right)
{
    return left.value() != right.sinceEpoch();
}

inline 
bool 
operator <(
    const Timestamp& left,
    const Timestamp& right)
{
    return left.sinceEpoch() < right.sinceEpoch();
}

inline 
bool 
operator >(
    const Timestamp& left,
    const Timestamp& right)
{
    return left.sinceEpoch() > right.sinceEpoch();
}

inline 
Timestamp
operator +(
    const Timestamp& timestamp,
    const TimeSpan& timeSpan)
{
    return 
        Timestamp(
            timestamp.sinceEpoch() + 
            timeSpan.ticks()
        );
}

inline 
Timestamp
operator -(
    const Timestamp& timestamp,
    const TimeSpan& timeSpan)
{
    return 
        Timestamp(
            timestamp.sinceEpoch() -
            timeSpan.ticks()
        );
}

inline 
TimeSpan
operator -(
    const Timestamp& left,
    const Timestamp& right)
{
    return 
        TimeSpan(
            left.sinceEpoch() - 
            right.sinceEpoch()
        );
}
 
// Serialization. 

ONIXS_CMESTREAMLINEDMDH_EXPORTED
void
toStrAsYYYYMMDD(std::string&, Timestamp);

ONIXS_CMESTREAMLINEDMDH_EXPORTED
void
toStrAsYYYYMMDDHHMMSS(std::string&, Timestamp);

ONIXS_CMESTREAMLINEDMDH_EXPORTED
void
toStrAsYYYYMMDDHHMMSSmsec(std::string&, Timestamp);

ONIXS_CMESTREAMLINEDMDH_EXPORTED
void
toStrAsYYYYMMDDHHMMSSnsec(std::string&, Timestamp);

ONIXS_CMESTREAMLINEDMDH_LTWT_STRUCT TimestampFormat
{
    enum Enum
    {
        YYYYMMDD,

        YYYYMMDDHHMMSS,

        YYYYMMDDHHMMSSmsec,

        YYYYMMDDHHMMSSnsec
    };
};

inline 
void
toStr(
    std::string& str,
    Timestamp timestamp,
    TimestampFormat::Enum format = 
        TimestampFormat::YYYYMMDDHHMMSSnsec)
{
    switch (format)
    {
    case TimestampFormat::YYYYMMDD:
        toStrAsYYYYMMDD(str, timestamp);
        break;
 
    case TimestampFormat::YYYYMMDDHHMMSS:
        toStrAsYYYYMMDDHHMMSS(str, timestamp);
        break;
 
    case TimestampFormat::YYYYMMDDHHMMSSmsec:
        toStrAsYYYYMMDDHHMMSSmsec(str, timestamp);
        break;
 
    case TimestampFormat::YYYYMMDDHHMMSSnsec:
        toStrAsYYYYMMDDHHMMSSnsec(str, timestamp);
        break;
 
    default:
        {
            throw std::invalid_argument(
                "Unknown timestamp format pattern specified. ");
        }        
    }
}

inline 
std::string
toStr(
    Timestamp timestamp,
    TimestampFormat::Enum format = 
        TimestampFormat::YYYYMMDDHHMMSSnsec)
{
    std::string str;
 
    toStr(str, timestamp, format);
 
    return str;
}

ONIXS_CMESTREAMLINEDMDH_EXPORTED
bool
fromStr(
    Timestamp&,
    const Char*, 
    size_t);

ONIXS_CMESTREAMLINEDMDH_EXPORTED_STRUCT WatchService
{
    virtual const Char* id() const = 0;

    virtual Timestamp now() = 0;
};

ONIXS_CMESTREAMLINEDMDH_EXPORTED_CLASS LocalWatch
{
public:
    static Timestamp now();

    static WatchService& service();
 
private:
    LocalWatch(const LocalWatch&);
    LocalWatch& operator =(const LocalWatch&);
};
 
// UTC watch. 
ONIXS_CMESTREAMLINEDMDH_EXPORTED_CLASS UtcWatch
{
public:
    static Timestamp now();

    static WatchService& service();
 
private:
    UtcWatch(const UtcWatch&);
    UtcWatch& operator =(const UtcWatch&);
};
 
ONIXS_CMESTREAMLINEDMDH_DATA_PACKING_END
ONIXS_CMESTREAMLINEDMDH_NAMESPACE_END