Chris@16: 
Chris@16: //  chrono_io
Chris@16: //
Chris@16: //  (C) Copyright Howard Hinnant
Chris@16: //  (C) Copyright 2010 Vicente J. Botet Escriba
Chris@16: //  Use, modification and distribution are subject to the Boost Software License,
Chris@16: //  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
Chris@16: //  http://www.boost.org/LICENSE_1_0.txt).
Chris@16: //
Chris@16: // This code was adapted by Vicente from Howard Hinnant's experimental work
Chris@16: // on chrono i/o under lvm/libc++  to Boost
Chris@16: 
Chris@16: #ifndef BOOST_CHRONO_IO_V1_CHRONO_IO_HPP
Chris@16: #define BOOST_CHRONO_IO_V1_CHRONO_IO_HPP
Chris@16: 
Chris@16: #include <boost/chrono/chrono.hpp>
Chris@16: #include <boost/chrono/process_cpu_clocks.hpp>
Chris@16: #include <boost/chrono/thread_clock.hpp>
Chris@16: #include <boost/chrono/clock_string.hpp>
Chris@16: #include <boost/ratio/ratio_io.hpp>
Chris@16: #include <locale>
Chris@16: #include <boost/type_traits/is_scalar.hpp>
Chris@16: #include <boost/type_traits/is_signed.hpp>
Chris@16: #include <boost/mpl/if.hpp>
Chris@101: #include <boost/integer/common_factor_rt.hpp>
Chris@16: #include <boost/chrono/detail/scan_keyword.hpp>
Chris@16: #include <boost/utility/enable_if.hpp>
Chris@16: #include <boost/chrono/detail/no_warning/signed_unsigned_cmp.hpp>
Chris@16: 
Chris@16: namespace boost
Chris@16: {
Chris@16: 
Chris@16: namespace chrono
Chris@16: {
Chris@16: 
Chris@16: template <class CharT>
Chris@16: class duration_punct
Chris@16:     : public std::locale::facet
Chris@16: {
Chris@16: public:
Chris@16:     typedef std::basic_string<CharT> string_type;
Chris@16:     enum {use_long, use_short};
Chris@16: 
Chris@16: private:
Chris@16:     bool use_short_;
Chris@16:     string_type long_seconds_;
Chris@16:     string_type long_minutes_;
Chris@16:     string_type long_hours_;
Chris@16:     string_type short_seconds_;
Chris@16:     string_type short_minutes_;
Chris@16:     string_type short_hours_;
Chris@16: 
Chris@16:     template <class Period>
Chris@16:         string_type short_name(Period) const
Chris@16:             {return ::boost::ratio_string<Period, CharT>::short_name() + short_seconds_;}
Chris@16: 
Chris@16:     string_type short_name(ratio<1>) const    {return short_seconds_;}
Chris@16:     string_type short_name(ratio<60>) const   {return short_minutes_;}
Chris@16:     string_type short_name(ratio<3600>) const {return short_hours_;}
Chris@16: 
Chris@16:     template <class Period>
Chris@16:         string_type long_name(Period) const
Chris@16:             {return ::boost::ratio_string<Period, CharT>::long_name() + long_seconds_;}
Chris@16: 
Chris@16:     string_type long_name(ratio<1>) const    {return long_seconds_;}
Chris@16:     string_type long_name(ratio<60>) const   {return long_minutes_;}
Chris@16:     string_type long_name(ratio<3600>) const {return long_hours_;}
Chris@16: 
Chris@16:     void init_C();
Chris@16: public:
Chris@16:     static std::locale::id id;
Chris@16: 
Chris@16:     explicit duration_punct(int use = use_long)
Chris@16:         : use_short_(use==use_short) {init_C();}
Chris@16: 
Chris@16:     duration_punct(int use,
Chris@16:         const string_type& long_seconds, const string_type& long_minutes,
Chris@16:         const string_type& long_hours, const string_type& short_seconds,
Chris@16:         const string_type& short_minutes, const string_type& short_hours);
Chris@16: 
Chris@16:     duration_punct(int use, const duration_punct& d);
Chris@16: 
Chris@16:     template <class Period>
Chris@16:         string_type short_name() const
Chris@16:             {return short_name(typename Period::type());}
Chris@16: 
Chris@16:     template <class Period>
Chris@16:         string_type long_name() const
Chris@16:             {return long_name(typename Period::type());}
Chris@16: 
Chris@16:     template <class Period>
Chris@16:         string_type plural() const
Chris@16:             {return long_name(typename Period::type());}
Chris@16: 
Chris@16:     template <class Period>
Chris@16:         string_type singular() const
Chris@16:     {
Chris@16:       return string_type(long_name(typename Period::type()), 0, long_name(typename Period::type()).size()-1);
Chris@16:     }
Chris@16: 
Chris@16:     template <class Period>
Chris@16:         string_type name() const
Chris@16:     {
Chris@16:       if (use_short_) return short_name<Period>();
Chris@16:       else {
Chris@16:         return long_name<Period>();
Chris@16:       }
Chris@16:     }
Chris@16:     template <class Period, class D>
Chris@16:       string_type name(D v) const
Chris@16:       {
Chris@16:         if (use_short_) return short_name<Period>();
Chris@16:         else
Chris@16:         {
Chris@16:           if (v==-1 || v==1)
Chris@16:             return singular<Period>();
Chris@16:           else
Chris@16:             return plural<Period>();
Chris@16:         }
Chris@16:       }
Chris@16: 
Chris@16:     bool is_short_name() const {return use_short_;}
Chris@16:     bool is_long_name() const {return !use_short_;}
Chris@16: };
Chris@16: 
Chris@16: template <class CharT>
Chris@16: std::locale::id
Chris@16: duration_punct<CharT>::id;
Chris@16: 
Chris@16: template <class CharT>
Chris@16: void
Chris@16: duration_punct<CharT>::init_C()
Chris@16: {
Chris@16:     short_seconds_ = CharT('s');
Chris@16:     short_minutes_ = CharT('m');
Chris@16:     short_hours_ = CharT('h');
Chris@16:     const CharT s[] = {'s', 'e', 'c', 'o', 'n', 'd', 's'};
Chris@16:     const CharT m[] = {'m', 'i', 'n', 'u', 't', 'e', 's'};
Chris@16:     const CharT h[] = {'h', 'o', 'u', 'r', 's'};
Chris@16:     long_seconds_.assign(s, s + sizeof(s)/sizeof(s[0]));
Chris@16:     long_minutes_.assign(m, m + sizeof(m)/sizeof(m[0]));
Chris@16:     long_hours_.assign(h, h + sizeof(h)/sizeof(h[0]));
Chris@16: }
Chris@16: 
Chris@16: template <class CharT>
Chris@16: duration_punct<CharT>::duration_punct(int use,
Chris@16:         const string_type& long_seconds, const string_type& long_minutes,
Chris@16:         const string_type& long_hours, const string_type& short_seconds,
Chris@16:         const string_type& short_minutes, const string_type& short_hours)
Chris@16:     : use_short_(use==use_short),
Chris@16:       long_seconds_(long_seconds),
Chris@16:       long_minutes_(long_minutes),
Chris@16:       long_hours_(long_hours),
Chris@16:       short_seconds_(short_seconds),
Chris@16:       short_minutes_(short_minutes),
Chris@16:       short_hours_(short_hours)
Chris@16: {}
Chris@16: 
Chris@16: template <class CharT>
Chris@16: duration_punct<CharT>::duration_punct(int use, const duration_punct& d)
Chris@16:     : use_short_(use==use_short),
Chris@16:       long_seconds_(d.long_seconds_),
Chris@16:       long_minutes_(d.long_minutes_),
Chris@16:       long_hours_(d.long_hours_),
Chris@16:       short_seconds_(d.short_seconds_),
Chris@16:       short_minutes_(d.short_minutes_),
Chris@16:       short_hours_(d.short_hours_)
Chris@16: {}
Chris@16: 
Chris@16: template <class CharT, class Traits>
Chris@16: std::basic_ostream<CharT, Traits>&
Chris@16: duration_short(std::basic_ostream<CharT, Traits>& os)
Chris@16: {
Chris@16:     typedef duration_punct<CharT> Facet;
Chris@16:     std::locale loc = os.getloc();
Chris@16:     if (std::has_facet<Facet>(loc))
Chris@16:     {
Chris@16:         const Facet& f = std::use_facet<Facet>(loc);
Chris@16:         if (f.is_long_name())
Chris@16:             os.imbue(std::locale(loc, new Facet(Facet::use_short, f)));
Chris@16:     }
Chris@16:     else
Chris@16:         os.imbue(std::locale(loc, new Facet(Facet::use_short)));
Chris@16:     return os;
Chris@16: }
Chris@16: 
Chris@16: template <class CharT, class Traits>
Chris@16: std::basic_ostream<CharT, Traits>&
Chris@16: duration_long(std::basic_ostream<CharT, Traits>& os)
Chris@16: {
Chris@16:     typedef duration_punct<CharT> Facet;
Chris@16:     std::locale loc = os.getloc();
Chris@16:     if (std::has_facet<Facet>(loc))
Chris@16:     {
Chris@16:         const Facet& f = std::use_facet<Facet>(loc);
Chris@16:         if (f.is_short_name())
Chris@16:             os.imbue(std::locale(loc, new Facet(Facet::use_long, f)));
Chris@16:     }
Chris@16:     return os;
Chris@16: }
Chris@16: 
Chris@16: template <class CharT, class Traits, class Rep, class Period>
Chris@16: std::basic_ostream<CharT, Traits>&
Chris@16: operator<<(std::basic_ostream<CharT, Traits>& os, const duration<Rep, Period>& d)
Chris@16: {
Chris@16:     typedef duration_punct<CharT> Facet;
Chris@16:     std::locale loc = os.getloc();
Chris@16:     if (!std::has_facet<Facet>(loc))
Chris@16:         os.imbue(std::locale(loc, new Facet));
Chris@16:     const Facet& f = std::use_facet<Facet>(os.getloc());
Chris@16:     return os << d.count() << ' ' << f.template name<Period>(d.count());
Chris@16: }
Chris@16: 
Chris@16: namespace chrono_detail {
Chris@16: template <class Rep, bool = is_scalar<Rep>::value>
Chris@16: struct duration_io_intermediate
Chris@16: {
Chris@16:     typedef Rep type;
Chris@16: };
Chris@16: 
Chris@16: template <class Rep>
Chris@16: struct duration_io_intermediate<Rep, true>
Chris@16: {
Chris@16:     typedef typename mpl::if_c
Chris@16:     <
Chris@16:         is_floating_point<Rep>::value,
Chris@16:             long double,
Chris@16:             typename mpl::if_c
Chris@16:             <
Chris@16:                 is_signed<Rep>::value,
Chris@16:                     long long,
Chris@16:                     unsigned long long
Chris@16:             >::type
Chris@16:     >::type type;
Chris@16: };
Chris@16: 
Chris@16: template <typename intermediate_type>
Chris@16: typename enable_if<is_integral<intermediate_type>, bool>::type
Chris@16: reduce(intermediate_type& r, unsigned long long& den, std::ios_base::iostate& err)
Chris@16: {
Chris@16:   typedef typename common_type<intermediate_type, unsigned long long>::type common_type_t;
Chris@16: 
Chris@16:     // Reduce r * num / den
Chris@101:   common_type_t t = integer::gcd<common_type_t>(common_type_t(r), common_type_t(den));
Chris@16:   r /= t;
Chris@16:   den /= t;
Chris@16:   if (den != 1)
Chris@16:   {
Chris@16:     // Conversion to Period is integral and not exact
Chris@16:     err |= std::ios_base::failbit;
Chris@16:     return false;
Chris@16:   }
Chris@16:   return true;
Chris@16: }
Chris@16: template <typename intermediate_type>
Chris@16: typename disable_if<is_integral<intermediate_type>, bool>::type
Chris@16: reduce(intermediate_type& , unsigned long long& , std::ios_base::iostate& )
Chris@16: {
Chris@16:   return true;
Chris@16: }
Chris@16: 
Chris@16: }
Chris@16: 
Chris@16: template <class CharT, class Traits, class Rep, class Period>
Chris@16: std::basic_istream<CharT, Traits>&
Chris@16: operator>>(std::basic_istream<CharT, Traits>& is, duration<Rep, Period>& d)
Chris@16: {
Chris@16:   //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:     typedef duration_punct<CharT> Facet;
Chris@16:     std::locale loc = is.getloc();
Chris@16:     //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:     if (!std::has_facet<Facet>(loc)) {
Chris@16:       //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:         is.imbue(std::locale(loc, new Facet));
Chris@16:     }
Chris@16:     //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:     loc = is.getloc();
Chris@16:     const Facet& f = std::use_facet<Facet>(loc);
Chris@16:     typedef typename chrono_detail::duration_io_intermediate<Rep>::type intermediate_type;
Chris@16:     intermediate_type r;
Chris@16:     std::ios_base::iostate err = std::ios_base::goodbit;
Chris@16:     // read value into r
Chris@16:     //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:     is >> r;
Chris@16:     //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:     if (is.good())
Chris@16:     {
Chris@16:       //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:         // now determine unit
Chris@16:         typedef std::istreambuf_iterator<CharT, Traits> in_iterator;
Chris@16:         in_iterator i(is);
Chris@16:         in_iterator e;
Chris@16:         //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:         if (i != e && *i == ' ')  // mandatory ' ' after value
Chris@16:         {
Chris@16:           //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:             ++i;
Chris@16:             if (i != e)
Chris@16:             {
Chris@16:               //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:                 // unit is num / den (yet to be determined)
Chris@16:                 unsigned long long num = 0;
Chris@16:                 unsigned long long den = 0;
Chris@16:                 if (*i == '[')
Chris@16:                 {
Chris@16:                   //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:                     // parse [N/D]s or [N/D]seconds format
Chris@16:                     ++i;
Chris@16:                     CharT x;
Chris@16:                     is >> num >> x >> den;
Chris@16:                     if (!is.good() || (x != '/'))
Chris@16:                     {
Chris@16:                       //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:                         is.setstate(is.failbit);
Chris@16:                         return is;
Chris@16:                     }
Chris@16:                     i = in_iterator(is);
Chris@16:                     if (*i != ']')
Chris@16:                     {
Chris@16:                       //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:                         is.setstate(is.failbit);
Chris@16:                         return is;
Chris@16:                     }
Chris@16:                     ++i;
Chris@16:                     const std::basic_string<CharT> units[] =
Chris@16:                     {
Chris@16:                         f.template singular<ratio<1> >(),
Chris@16:                         f.template plural<ratio<1> >(),
Chris@16:                         f.template short_name<ratio<1> >()
Chris@16:                     };
Chris@16:                     //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:                     const std::basic_string<CharT>* k = chrono_detail::scan_keyword(i, e,
Chris@16:                                   units, units + sizeof(units)/sizeof(units[0]),
Chris@16:                                   //~ std::use_facet<std::ctype<CharT> >(loc),
Chris@16:                                   err);
Chris@16:                     //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:                     is.setstate(err);
Chris@16:                     switch ((k - units) / 3)
Chris@16:                     {
Chris@16:                     case 0:
Chris@16:                       //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:                         break;
Chris@16:                     default:
Chris@16:                         is.setstate(err);
Chris@16:                         //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:                         return is;
Chris@16:                     }
Chris@16:                 }
Chris@16:                 else
Chris@16:                 {
Chris@16:                   //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:                     // parse SI name, short or long
Chris@16:                     const std::basic_string<CharT> units[] =
Chris@16:                     {
Chris@16:                         f.template singular<atto>(),
Chris@16:                         f.template plural<atto>(),
Chris@16:                         f.template short_name<atto>(),
Chris@16:                         f.template singular<femto>(),
Chris@16:                         f.template plural<femto>(),
Chris@16:                         f.template short_name<femto>(),
Chris@16:                         f.template singular<pico>(),
Chris@16:                         f.template plural<pico>(),
Chris@16:                         f.template short_name<pico>(),
Chris@16:                         f.template singular<nano>(),
Chris@16:                         f.template plural<nano>(),
Chris@16:                         f.template short_name<nano>(),
Chris@16:                         f.template singular<micro>(),
Chris@16:                         f.template plural<micro>(),
Chris@16:                         f.template short_name<micro>(),
Chris@16:                         f.template singular<milli>(),
Chris@16:                         f.template plural<milli>(),
Chris@16:                         f.template short_name<milli>(),
Chris@16:                         f.template singular<centi>(),
Chris@16:                         f.template plural<centi>(),
Chris@16:                         f.template short_name<centi>(),
Chris@16:                         f.template singular<deci>(),
Chris@16:                         f.template plural<deci>(),
Chris@16:                         f.template short_name<deci>(),
Chris@16:                         f.template singular<deca>(),
Chris@16:                         f.template plural<deca>(),
Chris@16:                         f.template short_name<deca>(),
Chris@16:                         f.template singular<hecto>(),
Chris@16:                         f.template plural<hecto>(),
Chris@16:                         f.template short_name<hecto>(),
Chris@16:                         f.template singular<kilo>(),
Chris@16:                         f.template plural<kilo>(),
Chris@16:                         f.template short_name<kilo>(),
Chris@16:                         f.template singular<mega>(),
Chris@16:                         f.template plural<mega>(),
Chris@16:                         f.template short_name<mega>(),
Chris@16:                         f.template singular<giga>(),
Chris@16:                         f.template plural<giga>(),
Chris@16:                         f.template short_name<giga>(),
Chris@16:                         f.template singular<tera>(),
Chris@16:                         f.template plural<tera>(),
Chris@16:                         f.template short_name<tera>(),
Chris@16:                         f.template singular<peta>(),
Chris@16:                         f.template plural<peta>(),
Chris@16:                         f.template short_name<peta>(),
Chris@16:                         f.template singular<exa>(),
Chris@16:                         f.template plural<exa>(),
Chris@16:                         f.template short_name<exa>(),
Chris@16:                         f.template singular<ratio<1> >(),
Chris@16:                         f.template plural<ratio<1> >(),
Chris@16:                         f.template short_name<ratio<1> >(),
Chris@16:                         f.template singular<ratio<60> >(),
Chris@16:                         f.template plural<ratio<60> >(),
Chris@16:                         f.template short_name<ratio<60> >(),
Chris@16:                         f.template singular<ratio<3600> >(),
Chris@16:                         f.template plural<ratio<3600> >(),
Chris@16:                         f.template short_name<ratio<3600> >()
Chris@16:                     };
Chris@16:                     //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:                     const std::basic_string<CharT>* k = chrono_detail::scan_keyword(i, e,
Chris@16:                                   units, units + sizeof(units)/sizeof(units[0]),
Chris@16:                                   //~ std::use_facet<std::ctype<CharT> >(loc),
Chris@16:                                   err);
Chris@16:                     //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:                     switch ((k - units) / 3)
Chris@16:                     {
Chris@16:                     case 0:
Chris@16:                         num = 1ULL;
Chris@16:                         den = 1000000000000000000ULL;
Chris@16:                         break;
Chris@16:                     case 1:
Chris@16:                         num = 1ULL;
Chris@16:                         den = 1000000000000000ULL;
Chris@16:                         break;
Chris@16:                     case 2:
Chris@16:                         num = 1ULL;
Chris@16:                         den = 1000000000000ULL;
Chris@16:                         break;
Chris@16:                     case 3:
Chris@16:                         num = 1ULL;
Chris@16:                         den = 1000000000ULL;
Chris@16:                         break;
Chris@16:                     case 4:
Chris@16:                         num = 1ULL;
Chris@16:                         den = 1000000ULL;
Chris@16:                         break;
Chris@16:                     case 5:
Chris@16:                         num = 1ULL;
Chris@16:                         den = 1000ULL;
Chris@16:                         break;
Chris@16:                     case 6:
Chris@16:                         num = 1ULL;
Chris@16:                         den = 100ULL;
Chris@16:                         break;
Chris@16:                     case 7:
Chris@16:                         num = 1ULL;
Chris@16:                         den = 10ULL;
Chris@16:                         break;
Chris@16:                     case 8:
Chris@16:                         num = 10ULL;
Chris@16:                         den = 1ULL;
Chris@16:                         break;
Chris@16:                     case 9:
Chris@16:                         num = 100ULL;
Chris@16:                         den = 1ULL;
Chris@16:                         break;
Chris@16:                     case 10:
Chris@16:                         num = 1000ULL;
Chris@16:                         den = 1ULL;
Chris@16:                         break;
Chris@16:                     case 11:
Chris@16:                         num = 1000000ULL;
Chris@16:                         den = 1ULL;
Chris@16:                         break;
Chris@16:                     case 12:
Chris@16:                         num = 1000000000ULL;
Chris@16:                         den = 1ULL;
Chris@16:                         break;
Chris@16:                     case 13:
Chris@16:                         num = 1000000000000ULL;
Chris@16:                         den = 1ULL;
Chris@16:                         break;
Chris@16:                     case 14:
Chris@16:                         num = 1000000000000000ULL;
Chris@16:                         den = 1ULL;
Chris@16:                         break;
Chris@16:                     case 15:
Chris@16:                         num = 1000000000000000000ULL;
Chris@16:                         den = 1ULL;
Chris@16:                         break;
Chris@16:                     case 16:
Chris@16:                         num = 1;
Chris@16:                         den = 1;
Chris@16:                         break;
Chris@16:                     case 17:
Chris@16:                         num = 60;
Chris@16:                         den = 1;
Chris@16:                         break;
Chris@16:                     case 18:
Chris@16:                         num = 3600;
Chris@16:                         den = 1;
Chris@16:                         break;
Chris@16:                     default:
Chris@16:                       //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:                         is.setstate(err|is.failbit);
Chris@16:                         return is;
Chris@16:                     }
Chris@16:                 }
Chris@16:                 //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:                 // unit is num/den
Chris@16:                 // r should be multiplied by (num/den) / Period
Chris@16:                 // Reduce (num/den) / Period to lowest terms
Chris@101:                 unsigned long long gcd_n1_n2 = integer::gcd<unsigned long long>(num, Period::num);
Chris@101:                 unsigned long long gcd_d1_d2 = integer::gcd<unsigned long long>(den, Period::den);
Chris@16:                 num /= gcd_n1_n2;
Chris@16:                 den /= gcd_d1_d2;
Chris@16:                 unsigned long long n2 = Period::num / gcd_n1_n2;
Chris@16:                 unsigned long long d2 = Period::den / gcd_d1_d2;
Chris@16:                 if (num > (std::numeric_limits<unsigned long long>::max)() / d2 ||
Chris@16:                     den > (std::numeric_limits<unsigned long long>::max)() / n2)
Chris@16:                 {
Chris@16:                   //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:                     // (num/den) / Period overflows
Chris@16:                     is.setstate(err|is.failbit);
Chris@16:                     return is;
Chris@16:                 }
Chris@16:                 num *= d2;
Chris@16:                 den *= n2;
Chris@16: 
Chris@16:                 typedef typename common_type<intermediate_type, unsigned long long>::type common_type_t;
Chris@16: 
Chris@16:                 //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:                 // num / den is now factor to multiply by r
Chris@16:                 if (!chrono_detail::reduce(r, den, err))
Chris@16:                 {
Chris@16:                   //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:                   is.setstate(err|is.failbit);
Chris@16:                   return is;
Chris@16:                 }
Chris@16: 
Chris@16:                 //if (r > ((duration_values<common_type_t>::max)() / num))
Chris@16:                 //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:                 if (chrono::detail::gt(r,((duration_values<common_type_t>::max)() / num)))
Chris@16:                 {
Chris@16:                     // Conversion to Period overflowed
Chris@16:                   //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:                     is.setstate(err|is.failbit);
Chris@16:                     return is;
Chris@16:                 }
Chris@16:                 //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:                 common_type_t t = r * num;
Chris@16:                 t /= den;
Chris@16:                 //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16: 
Chris@101:                 if (t > duration_values<common_type_t>::zero())
Chris@16:                 {
Chris@16:                   //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:                   Rep pt = t;
Chris@16:                   if ( (duration_values<Rep>::max)() < pt)
Chris@16:                   {
Chris@16:                     //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:                     // Conversion to Period overflowed
Chris@16:                     is.setstate(err|is.failbit);
Chris@16:                     return is;
Chris@16:                   }
Chris@16:                 }
Chris@16:                 //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:                 // Success!  Store it.
Chris@16:                 r = Rep(t);
Chris@16:                 d = duration<Rep, Period>(r);
Chris@16:                 is.setstate(err);
Chris@16:                 //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:                 return is;
Chris@16:             }
Chris@16:             else {
Chris@16:               //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:                 is.setstate(is.failbit | is.eofbit);
Chris@16:                 return is;
Chris@16:             }
Chris@16:         }
Chris@16:         else
Chris@16:         {
Chris@16:           //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:             if (i == e)
Chris@16:               is.setstate(is.failbit|is.eofbit);
Chris@16:             else
Chris@16:               is.setstate(is.failbit);
Chris@16:             //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:             return is;
Chris@16:         }
Chris@16:     }
Chris@16:     else {
Chris@16:       //std::cerr << __FILE__ << "[" << __LINE__ << "]"<< std::endl;
Chris@16:         //is.setstate(is.failbit);
Chris@16:       return is;
Chris@16:     }
Chris@16: }
Chris@16: 
Chris@16: 
Chris@16: template <class CharT, class Traits, class Clock, class Duration>
Chris@16: std::basic_ostream<CharT, Traits>&
Chris@16: operator<<(std::basic_ostream<CharT, Traits>& os,
Chris@16:            const time_point<Clock, Duration>& tp)
Chris@16: {
Chris@16:     return os << tp.time_since_epoch() << clock_string<Clock, CharT>::since();
Chris@16: }
Chris@16: 
Chris@16: template <class CharT, class Traits, class Clock, class Duration>
Chris@16: std::basic_istream<CharT, Traits>&
Chris@16: operator>>(std::basic_istream<CharT, Traits>& is,
Chris@16:            time_point<Clock, Duration>& tp)
Chris@16: {
Chris@16:     Duration d;
Chris@16:     is >> d;
Chris@16:     if (is.good())
Chris@16:     {
Chris@16:         const std::basic_string<CharT> units=clock_string<Clock, CharT>::since();
Chris@16:         std::ios_base::iostate err = std::ios_base::goodbit;
Chris@16:         typedef std::istreambuf_iterator<CharT, Traits> in_iterator;
Chris@16:         in_iterator i(is);
Chris@16:         in_iterator e;
Chris@16:         std::ptrdiff_t k = chrono_detail::scan_keyword(i, e,
Chris@16:                       &units, &units + 1,
Chris@16:                       //~ std::use_facet<std::ctype<CharT> >(is.getloc()),
Chris@16:                       err) - &units;
Chris@16:         is.setstate(err);
Chris@16:         if (k == 1)
Chris@16:         {
Chris@16:           is.setstate(err | is.failbit);
Chris@16:             // failed to read epoch string
Chris@16:             return is;
Chris@16:         }
Chris@16:         tp = time_point<Clock, Duration>(d);
Chris@16:     }
Chris@16:     else
Chris@16:         is.setstate(is.failbit);
Chris@16:     return is;
Chris@16: }
Chris@16: }  // chrono
Chris@16: 
Chris@16: }
Chris@16: 
Chris@16: #endif  // BOOST_CHRONO_CHRONO_IO_HPP