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authorRemko Tronçon <git@el-tramo.be>2009-06-01 08:48:42 (GMT)
committerRemko Tronçon <git@el-tramo.be>2009-06-01 09:24:28 (GMT)
commit2812bddd81f8a1b804c7460f4e14cd0aa393d129 (patch)
treed46294f35150c4f0f43deaf2d31fceaf945ae715 /3rdParty/Boost/boost/date_time/time_system_counted.hpp
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+#ifndef DATE_TIME_TIME_SYSTEM_COUNTED_HPP
+#define DATE_TIME_TIME_SYSTEM_COUNTED_HPP
+
+/* Copyright (c) 2002,2003 CrystalClear Software, Inc.
+ * Use, modification and distribution is subject to the
+ * Boost Software License, Version 1.0. (See accompanying
+ * file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
+ * Author: Jeff Garland, Bart Garst
+ * $Date: 2008-02-27 15:00:24 -0500 (Wed, 27 Feb 2008) $
+ */
+
+
+
+#include "boost/date_time/time_defs.hpp"
+#include <string>
+
+
+namespace boost {
+namespace date_time {
+
+ //! Time representation that uses a single integer count
+ template<class config>
+ struct counted_time_rep
+ {
+ typedef typename config::int_type int_type;
+ typedef typename config::date_type date_type;
+ typedef typename config::impl_type impl_type;
+ typedef typename date_type::duration_type date_duration_type;
+ typedef typename date_type::calendar_type calendar_type;
+ typedef typename date_type::ymd_type ymd_type;
+ typedef typename config::time_duration_type time_duration_type;
+ typedef typename config::resolution_traits resolution_traits;
+
+ counted_time_rep(const date_type& d, const time_duration_type& time_of_day)
+ : time_count_(1)
+ {
+ if(d.is_infinity() || d.is_not_a_date() || time_of_day.is_special()) {
+ time_count_ = time_of_day.get_rep() + d.day_count();
+ //std::cout << time_count_ << std::endl;
+ }
+ else {
+ time_count_ = (d.day_number() * frac_sec_per_day()) + time_of_day.ticks();
+ }
+ }
+ explicit counted_time_rep(int_type count) :
+ time_count_(count)
+ {}
+ explicit counted_time_rep(impl_type count) :
+ time_count_(count)
+ {}
+ date_type date() const
+ {
+ if(time_count_.is_special()) {
+ return date_type(time_count_.as_special());
+ }
+ else {
+ typename calendar_type::date_int_type dc = day_count();
+ //std::cout << "time_rep here:" << dc << std::endl;
+ ymd_type ymd = calendar_type::from_day_number(dc);
+ return date_type(ymd);
+ }
+ }
+ //int_type day_count() const
+ unsigned long day_count() const
+ {
+ /* resolution_traits::as_number returns a boost::int64_t &
+ * frac_sec_per_day is also a boost::int64_t so, naturally,
+ * the division operation returns a boost::int64_t.
+ * The static_cast to an unsigned long is ok (results in no data loss)
+ * because frac_sec_per_day is either the number of
+ * microseconds per day, or the number of nanoseconds per day.
+ * Worst case scenario: resolution_traits::as_number returns the
+ * maximum value an int64_t can hold and frac_sec_per_day
+ * is microseconds per day (lowest possible value).
+ * The division operation will then return a value of 106751991 -
+ * easily fitting in an unsigned long.
+ */
+ return static_cast<unsigned long>(resolution_traits::as_number(time_count_) / frac_sec_per_day());
+ }
+ int_type time_count() const
+ {
+ return resolution_traits::as_number(time_count_);
+ }
+ int_type tod() const
+ {
+ return resolution_traits::as_number(time_count_) % frac_sec_per_day();
+ }
+ static int_type frac_sec_per_day()
+ {
+ int_type seconds_per_day = 60*60*24;
+ int_type fractional_sec_per_sec(resolution_traits::res_adjust());
+ return seconds_per_day*fractional_sec_per_sec;
+ }
+ bool is_pos_infinity()const
+ {
+ return impl_type::is_pos_inf(time_count_.as_number());
+ }
+ bool is_neg_infinity()const
+ {
+ return impl_type::is_neg_inf(time_count_.as_number());
+ }
+ bool is_not_a_date_time()const
+ {
+ return impl_type::is_not_a_number(time_count_.as_number());
+ }
+ bool is_special()const
+ {
+ return time_count_.is_special();
+ }
+ impl_type get_rep()const
+ {
+ return time_count_;
+ }
+ private:
+ impl_type time_count_;
+ };
+
+ //! An unadjusted time system implementation.
+ template<class time_rep>
+ class counted_time_system
+ {
+ public:
+ typedef time_rep time_rep_type;
+ typedef typename time_rep_type::impl_type impl_type;
+ typedef typename time_rep_type::time_duration_type time_duration_type;
+ typedef typename time_duration_type::fractional_seconds_type fractional_seconds_type;
+ typedef typename time_rep_type::date_type date_type;
+ typedef typename time_rep_type::date_duration_type date_duration_type;
+
+
+ template<class T> static void unused_var(const T&) {}
+
+ static time_rep_type get_time_rep(const date_type& day,
+ const time_duration_type& tod,
+ date_time::dst_flags dst=not_dst)
+ {
+ unused_var(dst);
+ return time_rep_type(day, tod);
+ }
+
+ static time_rep_type get_time_rep(special_values sv)
+ {
+ switch (sv) {
+ case not_a_date_time:
+ return time_rep_type(date_type(not_a_date_time),
+ time_duration_type(not_a_date_time));
+ case pos_infin:
+ return time_rep_type(date_type(pos_infin),
+ time_duration_type(pos_infin));
+ case neg_infin:
+ return time_rep_type(date_type(neg_infin),
+ time_duration_type(neg_infin));
+ case max_date_time: {
+ time_duration_type td = time_duration_type(24,0,0,0) - time_duration_type(0,0,0,1);
+ return time_rep_type(date_type(max_date_time), td);
+ }
+ case min_date_time:
+ return time_rep_type(date_type(min_date_time), time_duration_type(0,0,0,0));
+
+ default:
+ return time_rep_type(date_type(not_a_date_time),
+ time_duration_type(not_a_date_time));
+
+ }
+
+ }
+
+ static date_type get_date(const time_rep_type& val)
+ {
+ return val.date();
+ }
+ static time_duration_type get_time_of_day(const time_rep_type& val)
+ {
+ if(val.is_special()) {
+ return time_duration_type(val.get_rep().as_special());
+ }
+ else{
+ return time_duration_type(0,0,0,val.tod());
+ }
+ }
+ static std::string zone_name(const time_rep_type&)
+ {
+ return "";
+ }
+ static bool is_equal(const time_rep_type& lhs, const time_rep_type& rhs)
+ {
+ return (lhs.time_count() == rhs.time_count());
+ }
+ static bool is_less(const time_rep_type& lhs, const time_rep_type& rhs)
+ {
+ return (lhs.time_count() < rhs.time_count());
+ }
+ static time_rep_type add_days(const time_rep_type& base,
+ const date_duration_type& dd)
+ {
+ if(base.is_special() || dd.is_special()) {
+ return(time_rep_type(base.get_rep() + dd.get_rep()));
+ }
+ else {
+ return time_rep_type(base.time_count() + (dd.days() * time_rep_type::frac_sec_per_day()));
+ }
+ }
+ static time_rep_type subtract_days(const time_rep_type& base,
+ const date_duration_type& dd)
+ {
+ if(base.is_special() || dd.is_special()) {
+ return(time_rep_type(base.get_rep() - dd.get_rep()));
+ }
+ else{
+ return time_rep_type(base.time_count() - (dd.days() * time_rep_type::frac_sec_per_day()));
+ }
+ }
+ static time_rep_type subtract_time_duration(const time_rep_type& base,
+ const time_duration_type& td)
+ {
+ if(base.is_special() || td.is_special()) {
+ return(time_rep_type(base.get_rep() - td.get_rep()));
+ }
+ else {
+ return time_rep_type(base.time_count() - td.ticks());
+ }
+ }
+ static time_rep_type add_time_duration(const time_rep_type& base,
+ time_duration_type td)
+ {
+ if(base.is_special() || td.is_special()) {
+ return(time_rep_type(base.get_rep() + td.get_rep()));
+ }
+ else {
+ return time_rep_type(base.time_count() + td.ticks());
+ }
+ }
+ static time_duration_type subtract_times(const time_rep_type& lhs,
+ const time_rep_type& rhs)
+ {
+ if(lhs.is_special() || rhs.is_special()) {
+ return(time_duration_type(
+ impl_type::to_special((lhs.get_rep() - rhs.get_rep()).as_number())));
+ }
+ else {
+ fractional_seconds_type fs = lhs.time_count() - rhs.time_count();
+ return time_duration_type(0,0,0,fs);
+ }
+ }
+
+ };
+
+
+} } //namespace date_time
+
+
+
+#endif
+