1<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 2<html> 3<head> 4<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 5<title>Class template dst_calc_engine</title> 6<link rel="stylesheet" href="../../../../doc/src/boostbook.css" type="text/css"> 7<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 8<link rel="home" href="../../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset"> 9<link rel="up" href="../../date_time/doxy.html#header.boost.date_time.dst_rules_hpp" title="Header <boost/date_time/dst_rules.hpp>"> 10<link rel="prev" href="from__1_3_14_15_3_22_1_1_8.html" title="Function template from_stream_type"> 11<link rel="next" href="dst_calculator.html" title="Class template dst_calculator"> 12</head> 13<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 14<table cellpadding="2" width="100%"><tr> 15<td valign="top"><img alt="Boost C++ Libraries" 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class="refentry"> 27<a name="boost.date_time.dst_calc_engine"></a><div class="titlepage"></div> 28<div class="refnamediv"> 29<h2><span class="refentrytitle">Class template dst_calc_engine</span></h2> 30<p>boost::date_time::dst_calc_engine — Compile-time configurable daylight savings time calculation engine. </p> 31</div> 32<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2> 33<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: <<a class="link" href="../../date_time/doxy.html#header.boost.date_time.dst_rules_hpp" title="Header <boost/date_time/dst_rules.hpp>">boost/date_time/dst_rules.hpp</a>> 34 35</span><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> date_type<span class="special">,</span> <span class="keyword">typename</span> time_duration_type<span class="special">,</span> <span class="keyword">typename</span> dst_traits<span class="special">></span> 36<span class="keyword">class</span> <a class="link" href="dst_calc_engine.html" title="Class template dst_calc_engine">dst_calc_engine</a> <span class="special">{</span> 37<span class="keyword">public</span><span class="special">:</span> 38 <span class="comment">// types</span> 39 <span class="keyword">typedef</span> <span class="identifier">date_type</span><span class="special">::</span><span class="identifier">year_type</span> <a name="boost.date_time.dst_calc_engine.year_type"></a><span class="identifier">year_type</span><span class="special">;</span> 40 <span class="keyword">typedef</span> <span class="identifier">date_type</span><span class="special">::</span><span class="identifier">calendar_type</span> <a name="boost.date_time.dst_calc_engine.calendar_type"></a><span class="identifier">calendar_type</span><span class="special">;</span> 41 <span class="keyword">typedef</span> <a class="link" href="dst_calculator.html" title="Class template dst_calculator">dst_calculator</a><span class="special"><</span> <span class="identifier">date_type</span><span class="special">,</span> <span class="identifier">time_duration_type</span> <span class="special">></span> <a name="boost.date_time.dst_calc_engine.dstcalc"></a><span class="identifier">dstcalc</span><span class="special">;</span> 42 43 <span class="comment">// <a class="link" href="dst_calc_engine.html#id-1_3_14_15_3_23_2_1_1_6-bb">public static functions</a></span> 44 <span class="keyword">static</span> <span class="identifier">time_is_dst_result</span> 45 <a class="link" href="dst_calc_engine.html#id-1_3_14_15_3_23_2_1_1_6_1-bb"><span class="identifier">local_is_dst</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">date_type</span> <span class="special">&</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">time_duration_type</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> 46 <span class="keyword">static</span> <span class="keyword">bool</span> <a class="link" href="dst_calc_engine.html#id-1_3_14_15_3_23_2_1_1_6_2-bb"><span class="identifier">is_dst_boundary_day</span></a><span class="special">(</span><span class="identifier">date_type</span><span class="special">)</span><span class="special">;</span> 47 <span class="keyword">static</span> <span class="identifier">time_duration_type</span> <a class="link" href="dst_calc_engine.html#id-1_3_14_15_3_23_2_1_1_6_3-bb"><span class="identifier">dst_offset</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> 48 <span class="keyword">static</span> <span class="identifier">date_type</span> <a class="link" href="dst_calc_engine.html#id-1_3_14_15_3_23_2_1_1_6_4-bb"><span class="identifier">local_dst_start_day</span></a><span class="special">(</span><span class="identifier">year_type</span><span class="special">)</span><span class="special">;</span> 49 <span class="keyword">static</span> <span class="identifier">date_type</span> <a class="link" href="dst_calc_engine.html#id-1_3_14_15_3_23_2_1_1_6_5-bb"><span class="identifier">local_dst_end_day</span></a><span class="special">(</span><span class="identifier">year_type</span><span class="special">)</span><span class="special">;</span> 50<span class="special">}</span><span class="special">;</span></pre></div> 51<div class="refsect1"> 52<a name="id-1.3.14.15.3.23.4.4"></a><h2>Description</h2> 53<div class="refsect2"> 54<a name="id-1.3.14.15.3.23.4.4.2"></a><h3> 55<a name="id-1_3_14_15_3_23_2_1_1_6-bb"></a><code class="computeroutput">dst_calc_engine</code> public static functions</h3> 56<div class="orderedlist"><ol class="orderedlist" type="1"> 57<li class="listitem"> 58<pre class="literallayout"><span class="keyword">static</span> <span class="identifier">time_is_dst_result</span> 59<a name="id-1_3_14_15_3_23_2_1_1_6_1-bb"></a><span class="identifier">local_is_dst</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">date_type</span> <span class="special">&</span> d<span class="special">,</span> <span class="keyword">const</span> <span class="identifier">time_duration_type</span> <span class="special">&</span> td<span class="special">)</span><span class="special">;</span></pre>Calculates if the given local time is dst or not. <p>Determines if the time is really in DST or not. Also checks for invalid and ambiguous. 60</p> 61</li> 62<li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="keyword">bool</span> <a name="id-1_3_14_15_3_23_2_1_1_6_2-bb"></a><span class="identifier">is_dst_boundary_day</span><span class="special">(</span><span class="identifier">date_type</span> d<span class="special">)</span><span class="special">;</span></pre></li> 63<li class="listitem"> 64<pre class="literallayout"><span class="keyword">static</span> <span class="identifier">time_duration_type</span> <a name="id-1_3_14_15_3_23_2_1_1_6_3-bb"></a><span class="identifier">dst_offset</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>The time of day for the dst transition (eg: typically 01:00:00 or 02:00:00) </li> 65<li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="identifier">date_type</span> <a name="id-1_3_14_15_3_23_2_1_1_6_4-bb"></a><span class="identifier">local_dst_start_day</span><span class="special">(</span><span class="identifier">year_type</span> year<span class="special">)</span><span class="special">;</span></pre></li> 66<li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="identifier">date_type</span> <a name="id-1_3_14_15_3_23_2_1_1_6_5-bb"></a><span class="identifier">local_dst_end_day</span><span class="special">(</span><span class="identifier">year_type</span> year<span class="special">)</span><span class="special">;</span></pre></li> 67</ol></div> 68</div> 69</div> 70</div> 71<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 72<td align="left"></td> 73<td align="right"><div class="copyright-footer">Copyright © 2001-2005 CrystalClear Software, Inc<p>Subject to the Boost Software License, Version 1.0. (See accompanying file 74 <code class="filename">LICENSE_1_0.txt</code> or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)</p> 75</div></td> 76</tr></table> 77<hr> 78<div class="spirit-nav"> 79<a accesskey="p" href="from__1_3_14_15_3_22_1_1_8.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../date_time/doxy.html#header.boost.date_time.dst_rules_hpp"><img src="../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="dst_calculator.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> 80</div> 81</body> 82</html> 83
