boost/chrono/io/duration_units.hpp
// (C) Copyright Howard Hinnant // (C) Copyright 2011 Vicente J. Botet Escriba // Use, modification and distribution are subject to the Boost Software License, // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt). // #ifndef BOOST_CHRONO_IO_DURATION_UNITS_HPP #define BOOST_CHRONO_IO_DURATION_UNITS_HPP #include <boost/chrono/config.hpp> #include <boost/ratio/ratio_io.hpp> #include <boost/chrono/duration.hpp> #include <boost/chrono/io/duration_style.hpp> #include <boost/chrono/io/ios_base_state.hpp> #include <boost/assert.hpp> #include <string> #include <ios> #include <locale> #include <algorithm> namespace boost { namespace chrono { class rt_ratio { public: template <typename Period> rt_ratio(Period const&) : num(Period::type::num), den(Period::type::den) { } rt_ratio(intmax_t n = 0, intmax_t d = 0) : num(n), den(d) { } intmax_t num; intmax_t den; }; /** * @c duration_units facet gives useful information about the duration units, * as the number of plural forms, the plural form associated to a duration, * the text associated to a plural form and a duration's period, */ template <typename CharT = char> class duration_units: public std::locale::facet { public: /** * Type of character the facet is instantiated on. */ typedef CharT char_type; /** * Type of character string passed to member functions. */ typedef std::basic_string<CharT> string_type; /** * Unique identifier for this type of facet. */ static std::locale::id id; /** * Construct a @c duration_units facet. * @param refs * @Effects Construct a @c duration_units facet. * If the @c refs argument is @c 0 then destruction of the object is * delegated to the @c locale, or locales, containing it. This allows * the user to ignore lifetime management issues. On the other had, * if @c refs is @c 1 then the object must be explicitly deleted; * the @c locale will not do so. In this case, the object can be * maintained across the lifetime of multiple locales. */ explicit duration_units(size_t refs = 0) : std::locale::facet(refs) { } /** * @return pointer to the start of valid [N/D] units. */ virtual const string_type* get_n_d_valid_units_start() const =0; /** * @effect calls the do_... * @return pointer to the end of valid [N/D] units. */ virtual const string_type* get_n_d_valid_units_end() const=0; /** * @return pointer to the start of valid units, symbol or prefix with its different plural forms. */ virtual const string_type* get_valid_units_start() const=0; /** * @return pointer to the end of valid units. */ virtual const string_type* get_valid_units_end() const=0; /** * @param k the found pointer to the [N/D] unit. * @return true if @c k matches a valid unit. */ virtual bool match_n_d_valid_unit(const string_type* k) const = 0; /** * @param k the found pointer to the unit. * @Effects @c rt is set to the valid Period when the @c k matches a valid unit. * @return true if @c k matches a valid unit. */ virtual bool match_valid_unit(const string_type* k, rt_ratio& rt) const = 0; /** * @effect calls the do_... * @return the pattern to be used by default. */ virtual string_type get_pattern() const=0; /** * @effect calls the do_... * @return the unit associated to this duration. */ template <typename Rep, typename Period> string_type get_unit(duration_style style, duration<Rep, Period> const& d) const { return do_get_unit(style, rt_ratio(Period()), static_cast<intmax_t>(d.count())); } /** * @effect calls the do_... * @return the [N/D] suffix unit associated to this duration. */ template <typename Rep, typename Period> string_type get_n_d_unit(duration_style style, duration<Rep, Period> const& d) const { return do_get_n_d_unit(style, rt_ratio(Period()), static_cast<intmax_t>(d.count())); } /** * @effect calls the do_... * @return true if the unit associated to the given Period is named, false otherwise. */ template <typename Period> bool is_named_unit() const { return do_is_named_unit(rt_ratio(Period())); } protected: /** * @Effects Destroys the facet */ virtual ~duration_units() { } /** * @return the [N/D] suffix unit associated to this duration. */ virtual string_type do_get_n_d_unit(duration_style style, rt_ratio rt, intmax_t v) const = 0; /** * @return the unit associated to this duration. */ virtual string_type do_get_unit(duration_style style,rt_ratio rt, intmax_t v) const = 0; /** * @return true if the unit associated to the given Period is named, false otherwise. */ virtual bool do_is_named_unit(rt_ratio rt) const =0; }; template <typename CharT> std::locale::id duration_units<CharT>::id; namespace detail { template<typename CharT> struct duration_units_default_holder { typedef std::basic_string<CharT> string_type; static string_type* n_d_valid_units_; static string_type* valid_units_; static bool initialized_; }; template <typename CharT> typename duration_units_default_holder<CharT>::string_type* duration_units_default_holder<CharT>::n_d_valid_units_=0; template <typename CharT> typename duration_units_default_holder<CharT>::string_type* duration_units_default_holder<CharT>::valid_units_=0; template<typename CharT> bool duration_units_default_holder<CharT>::initialized_ = false; } /** * This class is used to define the strings for the default English */ template <typename CharT = char> class duration_units_default: public duration_units<CharT> { protected: static const std::size_t pfs_ = 2; public: /** * Type of character the facet is instantiated on. */ typedef CharT char_type; /** * Type of character string passed to member functions. */ typedef std::basic_string<CharT> string_type; /** * Construct a @c duration_units_default facet. * @param refs * @Effects Construct a @c duration_units_default facet. * If the @c refs argument is @c 0 then destruction of the object is * delegated to the @c locale, or locales, containing it. This allows * the user to ignore lifetime management issues. On the other had, * if @c refs is @c 1 then the object must be explicitly deleted; * the @c locale will not do so. In this case, the object can be * maintained across the lifetime of multiple locales. */ explicit duration_units_default(size_t refs = 0) : duration_units<CharT> (refs) { } /** * Destroys the facet. */ ~duration_units_default() { } public: /** * @param k the found pointer to the [N/D] unit. * @return true if @c k matches a valid unit. */ bool match_n_d_valid_unit(const string_type* k) const { std::size_t index = (k - get_n_d_valid_units_start()) / (pfs_ + 1); switch (index) { case 0: break; default: return false; } return true; } /** * @param k the found pointer to the unit. * @Effects @c rt is set to the valid Period when the @c k matches a valid unit. * @return true if @c k matches a valid unit. */ bool match_valid_unit(const string_type* k, rt_ratio& rt) const { std::size_t index = (k - get_valid_units_start()) / (pfs_ + 1); switch (index) { case 0: rt = rt_ratio(atto()); break; case 1: rt = rt_ratio(femto()); break; case 2: rt = rt_ratio(pico()); break; case 3: rt = rt_ratio(nano()); break; case 4: rt = rt_ratio(micro()); break; case 5: rt = rt_ratio(milli()); break; case 6: rt = rt_ratio(centi()); break; case 7: rt = rt_ratio(deci()); break; case 8: rt = rt_ratio(deca()); break; case 9: rt = rt_ratio(hecto()); break; case 10: rt = rt_ratio(kilo()); break; case 11: rt = rt_ratio(mega()); break; case 12: rt = rt_ratio(giga()); break; case 13: rt = rt_ratio(tera()); break; case 14: rt = rt_ratio(peta()); break; case 15: rt = rt_ratio(exa()); break; case 16: rt = rt_ratio(ratio<1> ()); break; case 17: rt = rt_ratio(ratio<60> ()); break; case 18: rt = rt_ratio(ratio<3600> ()); break; default: return false; } return true; } /** * @return pointer to the start of valid [N/D] units. */ virtual const string_type* get_n_d_valid_units_start()const { return detail::duration_units_default_holder<CharT>::n_d_valid_units_; } /** * @return pointer to the end of valid [N/D] units. */ virtual const string_type* get_n_d_valid_units_end()const { return detail::duration_units_default_holder<CharT>::n_d_valid_units_ + (pfs_ + 1); } /** * @return pointer to the start of valid units. */ virtual const string_type* get_valid_units_start() const { return detail::duration_units_default_holder<CharT>::valid_units_; } /** * @return pointer to the end of valid units. */ virtual const string_type* get_valid_units_end() const { return detail::duration_units_default_holder<CharT>::valid_units_ + 19 * (pfs_ + 1); } string_type get_pattern() const { static const CharT t[] = { '%', 'v', ' ', '%', 'u' }; static const string_type pattern(t, t + sizeof (t) / sizeof (t[0])); return pattern; } protected: /** * * This facet names the units associated to the following periods: * atto,femto,pico,nano,micro,milli,centi,deci,ratio<1>,deca,hecto,kilo,mega,giga,tera,peta,exa,ratio<60> and ratio<3600>. * @return true if the unit associated to the given Period is named, false otherwise. */ bool do_is_named_unit(rt_ratio rt) const { if (rt.num==1) { switch (rt.den) { case BOOST_RATIO_INTMAX_C(1): case BOOST_RATIO_INTMAX_C(10): case BOOST_RATIO_INTMAX_C(100): case BOOST_RATIO_INTMAX_C(1000): case BOOST_RATIO_INTMAX_C(1000000): case BOOST_RATIO_INTMAX_C(1000000000): case BOOST_RATIO_INTMAX_C(1000000000000): case BOOST_RATIO_INTMAX_C(1000000000000000): case BOOST_RATIO_INTMAX_C(1000000000000000000): return true; default: return false; } } else if (rt.den==1) { switch (rt.num) { case BOOST_RATIO_INTMAX_C(10): case BOOST_RATIO_INTMAX_C(60): case BOOST_RATIO_INTMAX_C(100): case BOOST_RATIO_INTMAX_C(1000): case BOOST_RATIO_INTMAX_C(3600): case BOOST_RATIO_INTMAX_C(1000000): case BOOST_RATIO_INTMAX_C(1000000000): case BOOST_RATIO_INTMAX_C(1000000000000): case BOOST_RATIO_INTMAX_C(1000000000000000): case BOOST_RATIO_INTMAX_C(1000000000000000000): return true; default: return false; } } return false; } /** * In English the suffix used after [N/D] is the one associated to the period ratio<1>. * @return the [N/D] suffix unit associated to this duration. */ string_type do_get_n_d_unit(duration_style style, rt_ratio, intmax_t v) const { return do_get_unit(style, ratio<1>(), do_get_plural_form(v)); } /** * @return the unit associated to this duration if it is named, "" otherwise. */ string_type do_get_unit(duration_style style, rt_ratio rt, intmax_t v) const { if (rt.num==1) { switch (rt.den) { case BOOST_RATIO_INTMAX_C(1): return do_get_unit(style, ratio<1>(), do_get_plural_form(v)); case BOOST_RATIO_INTMAX_C(10): return do_get_unit(style, deci(), do_get_plural_form(v)); case BOOST_RATIO_INTMAX_C(100): return do_get_unit(style, centi(), do_get_plural_form(v)); case BOOST_RATIO_INTMAX_C(1000): return do_get_unit(style, milli(), do_get_plural_form(v)); case BOOST_RATIO_INTMAX_C(1000000): return do_get_unit(style, micro(), do_get_plural_form(v)); case BOOST_RATIO_INTMAX_C(1000000000): return do_get_unit(style, nano(), do_get_plural_form(v)); case BOOST_RATIO_INTMAX_C(1000000000000): return do_get_unit(style, pico(), do_get_plural_form(v)); case BOOST_RATIO_INTMAX_C(1000000000000000): return do_get_unit(style, femto(), do_get_plural_form(v)); case BOOST_RATIO_INTMAX_C(1000000000000000000): return do_get_unit(style, atto(), do_get_plural_form(v)); default: ; } } else if (rt.den==1) { switch (rt.num) { case BOOST_RATIO_INTMAX_C(10): return do_get_unit(style, deca(), do_get_plural_form(v)); case BOOST_RATIO_INTMAX_C(60): return do_get_unit(style, ratio<60>(), do_get_plural_form(v)); case BOOST_RATIO_INTMAX_C(100): return do_get_unit(style, hecto(), do_get_plural_form(v)); case BOOST_RATIO_INTMAX_C(1000): return do_get_unit(style, kilo(), do_get_plural_form(v)); case BOOST_RATIO_INTMAX_C(3600): return do_get_unit(style, ratio<3600>(), do_get_plural_form(v)); case BOOST_RATIO_INTMAX_C(1000000): return do_get_unit(style, mega(), do_get_plural_form(v)); case BOOST_RATIO_INTMAX_C(1000000000): return do_get_unit(style, giga(), do_get_plural_form(v)); case BOOST_RATIO_INTMAX_C(1000000000000): return do_get_unit(style, tera(), do_get_plural_form(v)); case BOOST_RATIO_INTMAX_C(1000000000000000): return do_get_unit(style, peta(), do_get_plural_form(v)); case BOOST_RATIO_INTMAX_C(1000000000000000000): return do_get_unit(style, exa(), do_get_plural_form(v)); default: ; } } BOOST_ASSERT(false&&"ratio parameter can not be translated"); //throw "exception"; return string_type(); } protected: /** * @return the number of associated plural forms this facet manages. */ virtual std::size_t do_get_plural_forms() const { return static_get_plural_forms(); } static std::size_t static_get_plural_forms() { return pfs_; } /** * Gets the associated plural form. * @param value the duration representation * @return the plural form associated to the @c value parameter. In English there are 2 plural forms * 0 singular (-1 or 1) * 1 plural for all others */ virtual std::size_t do_get_plural_form(int_least64_t value) const { return static_get_plural_form(value); } static std::size_t static_get_plural_form(int_least64_t value) { return (value == -1 || value == 1) ? 0 : 1; } /** * @param style the duration style. * @param period the period associated to the duration seconds. * @param pf the requested plural form. * @return if style is symbol returns "s", otherwise if pf is 0 return "second", if pf is 1 "seconds" */ virtual string_type do_get_unit(duration_style style, ratio<1> u, std::size_t pf) const { return static_get_unit(style,u,pf); } static string_type static_get_unit(duration_style style, ratio<1> , std::size_t pf) { static const CharT t[] = { 's' }; static const string_type symbol(t, t + sizeof (t) / sizeof (t[0])); static const CharT u[] = { 's', 'e', 'c', 'o', 'n', 'd' }; static const string_type singular(u, u + sizeof (u) / sizeof (u[0])); static const CharT v[] = { 's', 'e', 'c', 'o', 'n', 'd', 's' }; static const string_type plural(v, v + sizeof (v) / sizeof (v[0])); if (style == duration_style::symbol) { return symbol; } if (pf == 0) { return singular; } if (pf == 1) { return plural; } BOOST_ASSERT(false&&"style/pf parameters not valid"); //throw "exception"; return string_type(); } /** * @param style the duration style. * @param period the period associated to the duration minutes. * @param pf the requested plural form. * @return if style is symbol returns "min", otherwise if pf is 0 return "minute", if pf is 1 "minutes" */ virtual string_type do_get_unit(duration_style style, ratio<60> u, std::size_t pf) const { return static_get_unit(style,u,pf); } static string_type static_get_unit(duration_style style, ratio<60> , std::size_t pf) { static const CharT t[] = { 'm', 'i', 'n' }; static const string_type symbol(t, t + sizeof (t) / sizeof (t[0])); static const CharT u[] = { 'm', 'i', 'n', 'u', 't', 'e' }; static const string_type singular(u, u + sizeof (u) / sizeof (u[0])); static const CharT v[] = { 'm', 'i', 'n', 'u', 't', 'e', 's' }; static const string_type plural(v, v + sizeof (v) / sizeof (v[0])); if (style == duration_style::symbol) return symbol; if (pf == 0) return singular; if (pf == 1) return plural; BOOST_ASSERT(false&&"style/pf parameters not valid"); //throw "exception"; return string_type(); } /** * @param style the duration style. * @param period the period associated to the duration hours. * @param pf the requested plural form. * @return if style is symbol returns "h", otherwise if pf is 0 return "hour", if pf is 1 "hours" */ virtual string_type do_get_unit(duration_style style, ratio<3600> u, std::size_t pf) const { return static_get_unit(style,u,pf); } static string_type static_get_unit(duration_style style, ratio<3600> , std::size_t pf) { static const CharT t[] = { 'h' }; static const string_type symbol(t, t + sizeof (t) / sizeof (t[0])); static const CharT u[] = { 'h', 'o', 'u', 'r' }; static const string_type singular(u, u + sizeof (u) / sizeof (u[0])); static const CharT v[] = { 'h', 'o', 'u', 'r', 's' }; static const string_type plural(v, v + sizeof (v) / sizeof (v[0])); if (style == duration_style::symbol) return symbol; if (pf == 0) return singular; if (pf == 1) return plural; BOOST_ASSERT(false&&"style/pf parameters not valid"); //throw "exception"; return string_type(); } /** * @param style the duration style. * @param u the period tag atto. * @param pf the requested plural form. * @return the concatenation of the prefix associated to @c period + the one associated to seconds. */ virtual string_type do_get_unit(duration_style style, atto u, std::size_t pf) const { return do_get_ratio_prefix(style, u) + do_get_unit(style, ratio<1> (), pf); } static string_type static_get_unit(duration_style style, atto u, std::size_t pf) { return static_get_ratio_prefix(style, u) + static_get_unit(style, ratio<1> (), pf); } /** * @param style the duration style. * @param u the period tag femto. * @param pf the requested plural form. * @return the concatenation of the prefix associated to period @c u + the one associated to seconds. */ virtual string_type do_get_unit(duration_style style, femto u, std::size_t pf) const { return do_get_ratio_prefix(style, u) + do_get_unit(style, ratio<1> (), pf); } static string_type static_get_unit(duration_style style, femto u, std::size_t pf) { return static_get_ratio_prefix(style, u) + static_get_unit(style, ratio<1> (), pf); } /** * @param style the duration style. * @param u the period tag femto. * @param pf the requested plural form. * @return the concatenation of the prefix associated to period @c u + the one associated to seconds. */ virtual string_type do_get_unit(duration_style style, pico u, std::size_t pf) const { return do_get_ratio_prefix(style, u) + do_get_unit(style, ratio<1> (), pf); } static string_type static_get_unit(duration_style style, pico u, std::size_t pf) { return static_get_ratio_prefix(style, u) + static_get_unit(style, ratio<1> (), pf); } virtual string_type do_get_unit(duration_style style, nano u, std::size_t pf) const { return do_get_ratio_prefix(style, u) + do_get_unit(style, ratio<1> (), pf); } static string_type static_get_unit(duration_style style, nano u, std::size_t pf) { return static_get_ratio_prefix(style, u) + static_get_unit(style, ratio<1> (), pf); } virtual string_type do_get_unit(duration_style style, micro u, std::size_t pf) const { return do_get_ratio_prefix(style, u) + do_get_unit(style, ratio<1> (), pf); } static string_type static_get_unit(duration_style style, micro u, std::size_t pf) { return static_get_ratio_prefix(style, u) + static_get_unit(style, ratio<1> (), pf); } virtual string_type do_get_unit(duration_style style, milli u, std::size_t pf) const { return do_get_ratio_prefix(style, u) + do_get_unit(style, ratio<1> (), pf); } static string_type static_get_unit(duration_style style, milli u, std::size_t pf) { return static_get_ratio_prefix(style, u) + static_get_unit(style, ratio<1> (), pf); } virtual string_type do_get_unit(duration_style style, centi u, std::size_t pf) const { return do_get_ratio_prefix(style, u) + do_get_unit(style, ratio<1> (), pf); } static string_type static_get_unit(duration_style style, centi u, std::size_t pf) { return static_get_ratio_prefix(style, u) + static_get_unit(style, ratio<1> (), pf); } virtual string_type do_get_unit(duration_style style, deci u, std::size_t pf) const { return do_get_ratio_prefix(style, u) + do_get_unit(style, ratio<1> (), pf); } static string_type static_get_unit(duration_style style, deci u, std::size_t pf) { return static_get_ratio_prefix(style, u) + static_get_unit(style, ratio<1> (), pf); } virtual string_type do_get_unit(duration_style style, deca u, std::size_t pf) const { return do_get_ratio_prefix(style, u) + do_get_unit(style, ratio<1> (), pf); } static string_type static_get_unit(duration_style style, deca u, std::size_t pf) { return static_get_ratio_prefix(style, u) + static_get_unit(style, ratio<1> (), pf); } virtual string_type do_get_unit(duration_style style, hecto u, std::size_t pf) const { return do_get_ratio_prefix(style, u) + do_get_unit(style, ratio<1> (), pf); } static string_type static_get_unit(duration_style style, hecto u, std::size_t pf) { return static_get_ratio_prefix(style, u) + static_get_unit(style, ratio<1> (), pf); } virtual string_type do_get_unit(duration_style style, kilo u, std::size_t pf) const { return do_get_ratio_prefix(style, u) + do_get_unit(style, ratio<1> (), pf); } static string_type static_get_unit(duration_style style, kilo u, std::size_t pf) { return static_get_ratio_prefix(style, u) + static_get_unit(style, ratio<1> (), pf); } virtual string_type do_get_unit(duration_style style, mega u, std::size_t pf) const { return do_get_ratio_prefix(style, u) + do_get_unit(style, ratio<1> (), pf); } static string_type static_get_unit(duration_style style, mega u, std::size_t pf) { return static_get_ratio_prefix(style, u) + static_get_unit(style, ratio<1> (), pf); } virtual string_type do_get_unit(duration_style style, giga u, std::size_t pf) const { return do_get_ratio_prefix(style, u) + do_get_unit(style, ratio<1> (), pf); } static string_type static_get_unit(duration_style style, giga u, std::size_t pf) { return static_get_ratio_prefix(style, u) + static_get_unit(style, ratio<1> (), pf); } virtual string_type do_get_unit(duration_style style, tera u, std::size_t pf) const { return do_get_ratio_prefix(style, u) + do_get_unit(style, ratio<1> (), pf); } static string_type static_get_unit(duration_style style, tera u, std::size_t pf) { return static_get_ratio_prefix(style, u) + static_get_unit(style, ratio<1> (), pf); } virtual string_type do_get_unit(duration_style style, peta u, std::size_t pf) const { return do_get_ratio_prefix(style, u) + do_get_unit(style, ratio<1> (), pf); } static string_type static_get_unit(duration_style style, peta u, std::size_t pf) { return static_get_ratio_prefix(style, u) + static_get_unit(style, ratio<1> (), pf); } virtual string_type do_get_unit(duration_style style, exa u, std::size_t pf) const { return do_get_ratio_prefix(style, u) + do_get_unit(style, ratio<1> (), pf); } static string_type static_get_unit(duration_style style, exa u, std::size_t pf) { return static_get_ratio_prefix(style, u) + static_get_unit(style, ratio<1> (), pf); } protected: /** * @param style the duration style. * @param u the period tag atto. * @return depending on the value of @c style return the ratio_string symbol or prefix. */ virtual string_type do_get_ratio_prefix(duration_style style, atto u) const { return static_get_ratio_prefix(style, u); } static string_type static_get_ratio_prefix(duration_style style, atto) { if (style == duration_style::symbol) return ratio_string<atto, CharT>::symbol(); return ratio_string<atto, CharT>::prefix(); } virtual string_type do_get_ratio_prefix(duration_style style, femto u) const { return static_get_ratio_prefix(style, u); } static string_type static_get_ratio_prefix(duration_style style, femto) { if (style == duration_style::symbol) return ratio_string<femto, CharT>::symbol(); return ratio_string<femto, CharT>::prefix(); } virtual string_type do_get_ratio_prefix(duration_style style, pico u) const { return static_get_ratio_prefix(style, u); } static string_type static_get_ratio_prefix(duration_style style, pico) { if (style == duration_style::symbol) return ratio_string<pico, CharT>::symbol(); return ratio_string<pico, CharT>::prefix(); } virtual string_type do_get_ratio_prefix(duration_style style, nano u) const { return static_get_ratio_prefix(style, u); } static string_type static_get_ratio_prefix(duration_style style, nano) { if (style == duration_style::symbol) return ratio_string<nano, CharT>::symbol(); return ratio_string<nano, CharT>::prefix(); } virtual string_type do_get_ratio_prefix(duration_style style, micro u) const { return static_get_ratio_prefix(style, u); } static string_type static_get_ratio_prefix(duration_style style, micro) { if (style == duration_style::symbol) return ratio_string<micro, CharT>::symbol(); return ratio_string<micro, CharT>::prefix(); } virtual string_type do_get_ratio_prefix(duration_style style, milli u) const { return static_get_ratio_prefix(style, u); } static string_type static_get_ratio_prefix(duration_style style, milli) { if (style == duration_style::symbol) return ratio_string<milli, CharT>::symbol(); return ratio_string<milli, CharT>::prefix(); } virtual string_type do_get_ratio_prefix(duration_style style, centi u) const { return static_get_ratio_prefix(style, u); } static string_type static_get_ratio_prefix(duration_style style, centi) { if (style == duration_style::symbol) return ratio_string<centi, CharT>::symbol(); return ratio_string<centi, CharT>::prefix(); } virtual string_type do_get_ratio_prefix(duration_style style, deci u) const { return static_get_ratio_prefix(style, u); } static string_type static_get_ratio_prefix(duration_style style, deci) { if (style == duration_style::symbol) return ratio_string<deci, CharT>::symbol(); return ratio_string<deci, CharT>::prefix(); } virtual string_type do_get_ratio_prefix(duration_style style, deca u) const { return static_get_ratio_prefix(style, u); } static string_type static_get_ratio_prefix(duration_style style, deca) { if (style == duration_style::symbol) return ratio_string<deca, CharT>::symbol(); return ratio_string<deca, CharT>::prefix(); } virtual string_type do_get_ratio_prefix(duration_style style, hecto u) const { return static_get_ratio_prefix(style, u); } static string_type static_get_ratio_prefix(duration_style style, hecto) { if (style == duration_style::symbol) return ratio_string<hecto, CharT>::symbol(); return ratio_string<hecto, CharT>::prefix(); } virtual string_type do_get_ratio_prefix(duration_style style, kilo u) const { return static_get_ratio_prefix(style, u); } static string_type static_get_ratio_prefix(duration_style style, kilo) { if (style == duration_style::symbol) return ratio_string<kilo, CharT>::symbol(); return ratio_string<kilo, CharT>::prefix(); } virtual string_type do_get_ratio_prefix(duration_style style, mega u) const { return static_get_ratio_prefix(style, u); } static string_type static_get_ratio_prefix(duration_style style, mega) { if (style == duration_style::symbol) return ratio_string<mega, CharT>::symbol(); return ratio_string<mega, CharT>::prefix(); } virtual string_type do_get_ratio_prefix(duration_style style, giga u) const { return static_get_ratio_prefix(style, u); } static string_type static_get_ratio_prefix(duration_style style, giga) { if (style == duration_style::symbol) return ratio_string<giga, CharT>::symbol(); return ratio_string<giga, CharT>::prefix(); } virtual string_type do_get_ratio_prefix(duration_style style, tera u) const { return static_get_ratio_prefix(style, u); } static string_type static_get_ratio_prefix(duration_style style, tera) { if (style == duration_style::symbol) return ratio_string<tera, CharT>::symbol(); return ratio_string<tera, CharT>::prefix(); } virtual string_type do_get_ratio_prefix(duration_style style, peta u) const { return static_get_ratio_prefix(style, u); } static string_type static_get_ratio_prefix(duration_style style, peta) { if (style == duration_style::symbol) return ratio_string<peta, CharT>::symbol(); return ratio_string<peta, CharT>::prefix(); } virtual string_type do_get_ratio_prefix(duration_style style, exa u) const { return static_get_ratio_prefix(style, u); } static string_type static_get_ratio_prefix(duration_style style, exa) { if (style == duration_style::symbol) return ratio_string<exa, CharT>::symbol(); return ratio_string<exa, CharT>::prefix(); } protected: template <typename Period> string_type* fill_units(string_type* it, Period) const { std::size_t pfs = do_get_plural_forms(); for (std::size_t pf = 0; pf < pfs; ++pf) { *it++ = do_get_unit(duration_style::prefix, Period(), pf); } *it++ = do_get_unit(duration_style::symbol, Period(), 0); return it; } public: template <typename Period> static string_type* static_fill_units(string_type* it, Period) { std::size_t pfs = static_get_plural_forms(); for (std::size_t pf = 0; pf < pfs; ++pf) { *it++ = static_get_unit(duration_style::prefix, Period(), pf); } *it++ = static_get_unit(duration_style::symbol, Period(), 0); return it; } static string_type* static_init_valid_units(string_type* it) { it = static_fill_units(it, atto()); it = static_fill_units(it, femto()); it = static_fill_units(it, pico()); it = static_fill_units(it, nano()); it = static_fill_units(it, micro()); it = static_fill_units(it, milli()); it = static_fill_units(it, centi()); it = static_fill_units(it, deci()); it = static_fill_units(it, deca()); it = static_fill_units(it, hecto()); it = static_fill_units(it, kilo()); it = static_fill_units(it, mega()); it = static_fill_units(it, giga()); it = static_fill_units(it, tera()); it = static_fill_units(it, peta()); it = static_fill_units(it, exa()); it = static_fill_units(it, ratio<1> ()); it = static_fill_units(it, ratio<60> ()); it = static_fill_units(it, ratio<3600> ()); return it; } }; namespace detail { template<typename CharT> struct duration_units_default_initializer_t { duration_units_default_initializer_t() { if (!duration_units_default_holder<CharT>::initialized_) { typedef typename duration_units_default_holder<CharT>::string_type string_type; duration_units_default_holder<CharT>::n_d_valid_units_ = new string_type[3]; duration_units_default_holder<CharT>::valid_units_ = new string_type[19 * 3]; string_type* it = duration_units_default_holder<CharT>::n_d_valid_units_; it = duration_units_default<CharT>::static_fill_units(it, ratio<1> ()); it = duration_units_default<CharT>::static_init_valid_units(duration_units_default_holder<CharT>::valid_units_); duration_units_default_holder<CharT>::initialized_ = true; } } ~duration_units_default_initializer_t() { if (duration_units_default_holder<CharT>::initialized_) { delete[] duration_units_default_holder<CharT>::n_d_valid_units_; duration_units_default_holder<CharT>::n_d_valid_units_ = BOOST_NULLPTR; delete[] duration_units_default_holder<CharT>::valid_units_; duration_units_default_holder<CharT>::valid_units_ = BOOST_NULLPTR; duration_units_default_holder<CharT>::initialized_ = false; } } }; namespace /**/ { duration_units_default_initializer_t<char> duration_units_default_initializer; duration_units_default_initializer_t<wchar_t> wduration_units_default_initializer; } // namespace } } // chrono } // boost #endif // header