tickval.hpp

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//-------------------------------------------------------------------------------------------------
/*

Fix8 is released under the GNU LESSER GENERAL PUBLIC LICENSE Version 3.

Fix8 Open Source FIX Engine.
Copyright (C) 2010-16 David L. Dight <fix@fix8.org>

Fix8 is free software: you can  redistribute it and / or modify  it under the  terms of the
GNU Lesser General  Public License as  published  by the Free  Software Foundation,  either
version 3 of the License, or (at your option) any later version.

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even the  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

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*/
//-------------------------------------------------------------------------------------------------
#ifndef FIX8_TICKVAL_HPP_
#define FIX8_TICKVAL_HPP_

//-------------------------------------------------------------------------------------------------
#include <chrono>
#ifdef _MSC_VER
#include <limits.h>
#undef min
#undef max
#pragma warning(push)
#pragma warning(disable: 4307) // chrono(132): warning C4307: '*': integral constant overflow in vc140
#endif

//-------------------------------------------------------------------------------------------------
namespace FIX8 {

//-------------------------------------------------------------------------------------------------
class Tickval
{
public:
#if defined(__APPLE__) || defined(_MSC_VER)
   using f8_clock = std::chrono::system_clock;
#else
   using f8_clock = std::chrono::high_resolution_clock;
#endif
   using f8_time_point = std::chrono::time_point<f8_clock>;
   using ticks = decltype(f8_time_point::min().time_since_epoch().count());
   using f8_duration = f8_time_point::duration;
   static const ticks noticks = 0; // this should be a signed value
   static const ticks& errorticks() // 2262-04-12 09:47:16.854775807
   {
      static const auto g_ticks(std::chrono::duration_cast<std::chrono::nanoseconds>
         (f8_time_point::max().time_since_epoch()).count());
      return g_ticks;
   }
   static const ticks thousand = 1000;
   static const ticks million = thousand * thousand;
   static const ticks billion = thousand * million;
   static const ticks second = billion;
   static const ticks minute = 60 * second;
   static const ticks hour = 60 * minute;
   static const ticks day = 24 * hour;
   static const ticks week = 7 * day;

private:
   f8_time_point _value;

public:
   explicit Tickval(bool settonow=false)
      : _value(settonow ? f8_clock::now() : f8_time_point(f8_duration::zero())) {}

   Tickval(const Tickval& from) : _value(from._value) {}

   explicit Tickval(ticks from) : _value(std::chrono::duration_cast<f8_duration>(std::chrono::nanoseconds(from))) {}

   explicit Tickval(f8_time_point from) : _value(from) {}

   Tickval(time_t secs, long nsecs)
      : _value(f8_clock::from_time_t(secs) + std::chrono::duration_cast<f8_duration>(std::chrono::nanoseconds(nsecs))) {}

   Tickval& operator=(const Tickval& that)
   {
      if (this != &that)
         _value = that._value;
      return *this;
   }

   Tickval& operator=(ticks that)
   {
      _value = f8_time_point(std::chrono::duration_cast<f8_duration>(std::chrono::nanoseconds(that)));
      return *this;
   }

   ticks get_ticks() const { return std::chrono::duration_cast<std::chrono::nanoseconds>(_value.time_since_epoch()).count(); }

   Tickval& now()
   {
      _value = f8_clock::now();
      return *this;
   }

   time_t secs() const { return std::chrono::duration_cast<std::chrono::seconds>(_value.time_since_epoch()).count(); }

   unsigned msecs() const
   {
      return std::chrono::duration_cast<std::chrono::milliseconds>(_value.time_since_epoch()).count() % std::milli::den;
   }

   unsigned usecs() const
   {
      return std::chrono::duration_cast<std::chrono::microseconds>(_value.time_since_epoch()).count() % std::micro::den;
   }

   unsigned nsecs() const
   {
      return std::chrono::duration_cast<std::chrono::nanoseconds>(_value.time_since_epoch()).count() % std::nano::den;
   }

   double todouble() const
   {
      return static_cast<double>(std::chrono::duration_cast<std::chrono::nanoseconds>(_value.time_since_epoch()).count()) / std::nano::den;
   }

    bool is_errorval() const { return get_ticks() == errorticks(); }

   bool in_range(const Tickval& a, const Tickval& b) const
   {
      return !b.is_errorval() ? a <= *this && *this <= b : a <= *this;
   }

   Tickval& adjust(ticks by) { return *this += by; }

   static Tickval get_tickval() { return Tickval(true); }

   static Tickval& get_tickval(Tickval& to) { return to = Tickval(true); }

   struct tm *as_tm(struct tm& result) const
   {
      const time_t insecs(std::chrono::system_clock::to_time_t(_value));
#ifdef _MSC_VER
      gmtime_s(&result, &insecs);
#else
      gmtime_r(&insecs, &result);
#endif
      return &result;
   }

   struct tm get_tm() const
   {
      struct tm result;
      return *as_tm(result);
   }

   void set(time_t secs, long nsecs) { _value = Tickval(secs, nsecs)._value; }

   bool operator!() const { return _value.time_since_epoch() == std::chrono::nanoseconds::zero(); }

   operator void*() { return _value.time_since_epoch() == std::chrono::nanoseconds::zero() ? nullptr : this; }

   operator Tickval::ticks () { return _value.time_since_epoch().count(); }

   operator double() { return todouble(); }

   friend Tickval operator-(const Tickval& newtime, const Tickval& oldtime)
      { return Tickval(newtime._value - oldtime._value.time_since_epoch()); }

   friend Tickval& operator-=(Tickval& oldtime, const Tickval& newtime)
   {
      oldtime._value -= newtime._value.time_since_epoch();
      return oldtime;
   }

   friend Tickval operator+(const Tickval& newtime, const Tickval& oldtime)
      { return Tickval(newtime._value + oldtime._value.time_since_epoch()); }

   friend Tickval& operator+=(Tickval& oldtime, const Tickval& newtime)
   {
      oldtime._value += newtime._value.time_since_epoch();
      return oldtime;
   }

   friend bool operator==(const Tickval& a, const Tickval& b) { return a._value == b._value; }

   friend bool operator!=(const Tickval& a, const Tickval& b) { return a._value != b._value; }

   friend bool operator>(const Tickval& a, const Tickval& b) { return a._value > b._value; }

   friend bool operator<(const Tickval& a, const Tickval& b) { return a._value < b._value; }

   friend bool operator>=(const Tickval& a, const Tickval& b) { return a._value >= b._value; }

   friend bool operator<=(const Tickval& a, const Tickval& b) { return a._value <= b._value; }

   friend Tickval& operator+=(Tickval& oldtime, ticks ns)
   {
      oldtime._value += std::chrono::duration_cast<f8_duration>(std::chrono::nanoseconds(ns));
      return oldtime;
   }

   friend Tickval& operator-=(Tickval& oldtime, ticks ns)
   {
      oldtime._value -= std::chrono::duration_cast<f8_duration>(std::chrono::nanoseconds(ns));
      return oldtime;
   }

   friend std::ostream& operator<<(std::ostream& os, const Tickval& what)
   {
      std::string result;
      return os << GetTimeAsStringMS(result, &what, 9, false);
   }

   friend std::ostream& operator>>(std::ostream& os, const Tickval& what)
   {
      std::string result;
      return os << GetTimeAsStringMS(result, &what, 9, true);
   }
};

} // FIX8

#ifdef _MSC_VER
#pragma warning(pop)
#endif

#endif // FIX8PRO_TICKVAL_HPP_