75 lines
2.1 KiB
XML
75 lines
2.1 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
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"../../../tools/boostbook/dtd/boostbook.dtd">
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<!-- Copyright (c) 2001-2004 CrystalClear Software, Inc.
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Subject to the Boost Software License, Version 1.0.
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(See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
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-->
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<section id="date_time.examples.time_periods">
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<title>Time Periods</title>
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<para>
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Demonstrate some simple uses of time periods.
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</para>
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<programlisting>
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<![CDATA[
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/* Some simple examples of constructing and calculating with times
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* Returns:
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* [2002-Feb-01 00:00:00/2002-Feb-01 23:59:59.999999999]
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* contains 2002-Feb-01 03:00:05
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* [2002-Feb-01 00:00:00/2002-Feb-01 23:59:59.999999999]
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* intersected with
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* [2002-Feb-01 00:00:00/2002-Feb-01 03:00:04.999999999]
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* is
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* [2002-Feb-01 00:00:00/2002-Feb-01 03:00:04.999999999]
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*/
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#include "boost/date_time/posix_time/posix_time.hpp"
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#include <iostream>
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using namespace boost::posix_time;
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using namespace boost::gregorian;
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//Create a simple period class to contain all the times in a day
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class day_period : public time_period
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{
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public:
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day_period(date d) : time_period(ptime(d),//midnight
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ptime(d,hours(24)))
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{}
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};
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int
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main()
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{
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date d(2002,Feb,1); //an arbitrary date
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//a period that represents a day
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day_period dp(d);
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ptime t(d, hours(3)+seconds(5)); //an arbitray time on that day
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if (dp.contains(t)) {
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std::cout << to_simple_string(dp) << " contains "
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<< to_simple_string(t) << std::endl;
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}
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//a period that represents part of the day
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time_period part_of_day(ptime(d, hours(0)), t);
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//intersect the 2 periods and print the results
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if (part_of_day.intersects(dp)) {
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time_period result = part_of_day.intersection(dp);
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std::cout << to_simple_string(dp) << " intersected with\n"
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<< to_simple_string(part_of_day) << " is \n"
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<< to_simple_string(result) << std::endl;
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}
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return 0;
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}
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]]>
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</programlisting>
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</section>
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