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- <?xml version="1.0" encoding="utf-8"?>
- <!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
- "../../../tools/boostbook/dtd/boostbook.dtd">
- <!-- Copyright (c) 2001-2004 CrystalClear Software, Inc.
- 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)
- -->
- <section id="date_time.examples.time_periods">
- <title>Time Periods</title>
- <para>
- Demonstrate some simple uses of time periods.
- </para>
- <programlisting>
- <![CDATA[
- /* Some simple examples of constructing and calculating with times
- * Returns:
- * [2002-Feb-01 00:00:00/2002-Feb-01 23:59:59.999999999]
- * contains 2002-Feb-01 03:00:05
- * [2002-Feb-01 00:00:00/2002-Feb-01 23:59:59.999999999]
- * intersected with
- * [2002-Feb-01 00:00:00/2002-Feb-01 03:00:04.999999999]
- * is
- * [2002-Feb-01 00:00:00/2002-Feb-01 03:00:04.999999999]
- */
- #include "boost/date_time/posix_time/posix_time.hpp"
- #include <iostream>
- using namespace boost::posix_time;
- using namespace boost::gregorian;
- //Create a simple period class to contain all the times in a day
- class day_period : public time_period
- {
- public:
- day_period(date d) : time_period(ptime(d),//midnight
- ptime(d,hours(24)))
- {}
- };
- int
- main()
- {
- date d(2002,Feb,1); //an arbitrary date
- //a period that represents a day
- day_period dp(d);
- ptime t(d, hours(3)+seconds(5)); //an arbitray time on that day
- if (dp.contains(t)) {
- std::cout << to_simple_string(dp) << " contains "
- << to_simple_string(t) << std::endl;
- }
- //a period that represents part of the day
- time_period part_of_day(ptime(d, hours(0)), t);
- //intersect the 2 periods and print the results
- if (part_of_day.intersects(dp)) {
- time_period result = part_of_day.intersection(dp);
- std::cout << to_simple_string(dp) << " intersected with\n"
- << to_simple_string(part_of_day) << " is \n"
- << to_simple_string(result) << std::endl;
- }
-
-
- return 0;
- }
- ]]>
- </programlisting>
- </section>
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