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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>timestamp: Zeitgeist Reference Manual</title>
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<a href="#" class="shortcut">Top</a><span id="nav_description">  <span class="dim">|</span> 
                  <a href="#zeitgeist-2.0-timestamp.description" class="shortcut">Description</a></span>
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<div class="refentry">
<a name="zeitgeist-2.0-timestamp"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="zeitgeist-2.0-timestamp.top_of_page"></a>timestamp</span></h2>
<p>timestamp — Convenience functions for dealing with timestamps and dates</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="zeitgeist-2.0-timestamp.functions"></a><h2>Functions</h2>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<span class="returnvalue">gint64</span>
</td>
<td class="function_name">
<a class="link" href="zeitgeist-2.0-timestamp.html#zeitgeist-timestamp-from-timeval" title="zeitgeist_timestamp_from_timeval ()">zeitgeist_timestamp_from_timeval</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="zeitgeist-2.0-timestamp.html#zeitgeist-timestamp-to-timeval" title="zeitgeist_timestamp_to_timeval ()">zeitgeist_timestamp_to_timeval</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gint64</span>
</td>
<td class="function_name">
<a class="link" href="zeitgeist-2.0-timestamp.html#zeitgeist-timestamp-from-now" title="zeitgeist_timestamp_from_now ()">zeitgeist_timestamp_from_now</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gint64</span>
</td>
<td class="function_name">
<a class="link" href="zeitgeist-2.0-timestamp.html#zeitgeist-timestamp-from-iso8601" title="zeitgeist_timestamp_from_iso8601 ()">zeitgeist_timestamp_from_iso8601</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="../glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="zeitgeist-2.0-timestamp.html#zeitgeist-timestamp-to-iso8601" title="zeitgeist_timestamp_to_iso8601 ()">zeitgeist_timestamp_to_iso8601</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gint64</span>
</td>
<td class="function_name">
<a class="link" href="zeitgeist-2.0-timestamp.html#zeitgeist-timestamp-from-date" title="zeitgeist_timestamp_from_date ()">zeitgeist_timestamp_from_date</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gint64</span>
</td>
<td class="function_name">
<a class="link" href="zeitgeist-2.0-timestamp.html#zeitgeist-timestamp-from-dmy" title="zeitgeist_timestamp_from_dmy ()">zeitgeist_timestamp_from_dmy</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="zeitgeist-2.0-timestamp.html#zeitgeist-timestamp-to-date" title="zeitgeist_timestamp_to_date ()">zeitgeist_timestamp_to_date</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gint64</span>
</td>
<td class="function_name">
<a class="link" href="zeitgeist-2.0-timestamp.html#zeitgeist-timestamp-next-midnight" title="zeitgeist_timestamp_next_midnight ()">zeitgeist_timestamp_next_midnight</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gint64</span>
</td>
<td class="function_name">
<a class="link" href="zeitgeist-2.0-timestamp.html#zeitgeist-timestamp-prev-midnight" title="zeitgeist_timestamp_prev_midnight ()">zeitgeist_timestamp_prev_midnight</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="zeitgeist-2.0-timestamp.html#ZEITGEIST-TIMESTAMP-SECOND:CAPS" title="ZEITGEIST_TIMESTAMP_SECOND">ZEITGEIST_TIMESTAMP_SECOND</a></td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="zeitgeist-2.0-timestamp.html#ZEITGEIST-TIMESTAMP-MINUTE:CAPS" title="ZEITGEIST_TIMESTAMP_MINUTE">ZEITGEIST_TIMESTAMP_MINUTE</a></td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="zeitgeist-2.0-timestamp.html#ZEITGEIST-TIMESTAMP-HOUR:CAPS" title="ZEITGEIST_TIMESTAMP_HOUR">ZEITGEIST_TIMESTAMP_HOUR</a></td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="zeitgeist-2.0-timestamp.html#ZEITGEIST-TIMESTAMP-DAY:CAPS" title="ZEITGEIST_TIMESTAMP_DAY">ZEITGEIST_TIMESTAMP_DAY</a></td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="zeitgeist-2.0-timestamp.html#ZEITGEIST-TIMESTAMP-WEEK:CAPS" title="ZEITGEIST_TIMESTAMP_WEEK">ZEITGEIST_TIMESTAMP_WEEK</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="zeitgeist-2.0-timestamp.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody><tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="zeitgeist-2.0-timestamp.html#ZEITGEIST-TIMESTAMP-YEAR:CAPS" title="ZEITGEIST_TIMESTAMP_YEAR">ZEITGEIST_TIMESTAMP_YEAR</a></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect1">
<a name="zeitgeist-2.0-timestamp.description"></a><h2>Description</h2>
<p>include: zeitgeist.h</p>
<p>A suite of convenience functions for dealing with timestamps and dates.</p>
<p>Zeitgeist timestamps are represented as <span class="bold"><strong>gint64</strong></span>s with the number of milliseconds since the Unix Epoch.</p>
</div>
<div class="refsect1">
<a name="zeitgeist-2.0-timestamp.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="zeitgeist-timestamp-from-timeval"></a><h3>zeitgeist_timestamp_from_timeval ()</h3>
<pre class="programlisting"><span class="returnvalue">gint64</span>
zeitgeist_timestamp_from_timeval (<em class="parameter"><code><a href="../glib/glib-Date-and-Time-Functions.html#GTimeVal"><span class="type">GTimeVal</span></a> *timeval</code></em>);</pre>
<p>Convert a <a href="../glib/glib-Date-and-Time-Functions.html#GTimeVal"><span class="type">GTimeVal</span></a> to an amount of milliseconds since the Unix Epoch</p>
<div class="refsect3">
<a name="id-1.3.3.6.2.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>self</p></td>
<td class="parameter_description"><p>the (null) instance</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>timeval</p></td>
<td class="parameter_description">
<p>  .  </p>
<p>time to convert </p>
<p>. </p>
</td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for input. Default is transfer none."><span class="acronym">in</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.3.3.6.2.6"></a><h4>Returns</h4>
<p>number of milliseconds since the Unix Epoch </p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="zeitgeist-timestamp-to-timeval"></a><h3>zeitgeist_timestamp_to_timeval ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
zeitgeist_timestamp_to_timeval (<em class="parameter"><code><span class="type">gint64</span> timestamp</code></em>,
                                <em class="parameter"><code><a href="../glib/glib-Date-and-Time-Functions.html#GTimeVal"><span class="type">GTimeVal</span></a> *result</code></em>);</pre>
<p>Write a Zeitgeist timestamp to a <a href="../glib/glib-Date-and-Time-Functions.html#GTimeVal"><span class="type">GTimeVal</span></a> instance. Note that Zeitgeist uses only a millisecond resolution, whereas <a href="../glib/glib-Date-and-Time-Functions.html#GTimeVal"><span class="type">GTimeVal</span></a> has microsecond resolution. This means that the lower three digits of <em class="parameter"><code>tv.tv_usec</code></em>
 will always be 0.</p>
<div class="refsect3">
<a name="id-1.3.3.6.3.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>self</p></td>
<td class="parameter_description"><p>the (null) instance</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>timestamp</p></td>
<td class="parameter_description">
<p>  .  </p>
<p>to convert </p>
<p>. </p>
</td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for input. Default is transfer none."><span class="acronym">in</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.3.3.6.3.6"></a><h4>Returns</h4>
<p>the equivalent <a href="../glib/glib-Date-and-Time-Functions.html#GTimeVal"><span class="type">GTimeVal</span></a> instance. </p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="zeitgeist-timestamp-from-now"></a><h3>zeitgeist_timestamp_from_now ()</h3>
<pre class="programlisting"><span class="returnvalue">gint64</span>
zeitgeist_timestamp_from_now (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Return the current timestamp in milliseconds.</p>
<div class="refsect3">
<a name="id-1.3.3.6.4.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>self</p></td>
<td class="parameter_description"><p>the (null) instance</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.3.3.6.4.6"></a><h4>Returns</h4>
<p>the timestamp for the current system time, in milliseconds since the Unix Epoch </p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="zeitgeist-timestamp-from-iso8601"></a><h3>zeitgeist_timestamp_from_iso8601 ()</h3>
<pre class="programlisting"><span class="returnvalue">gint64</span>
zeitgeist_timestamp_from_iso8601 (<em class="parameter"><code>const <a href="../glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *datetime</code></em>);</pre>
<p>Parse a timestamp from an ISO8601-encoded string.</p>
<div class="refsect3">
<a name="id-1.3.3.6.5.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>self</p></td>
<td class="parameter_description"><p>the (null) instance</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>datetime</p></td>
<td class="parameter_description">
<p>  .  </p>
<p>a string containing an ISO8601-conforming datetime </p>
<p>. </p>
</td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for input. Default is transfer none."><span class="acronym">in</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.3.3.6.5.6"></a><h4>Returns</h4>
<p>the timestamp represented by the given string, or -1 if it can't be parsed </p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="zeitgeist-timestamp-to-iso8601"></a><h3>zeitgeist_timestamp_to_iso8601 ()</h3>
<pre class="programlisting"><a href="../glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
zeitgeist_timestamp_to_iso8601 (<em class="parameter"><code><span class="type">gint64</span> timestamp</code></em>);</pre>
<p>Convert a timestamp to a human-readable ISO8601 format</p>
<div class="refsect3">
<a name="id-1.3.3.6.6.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>self</p></td>
<td class="parameter_description"><p>the (null) instance</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>timestamp</p></td>
<td class="parameter_description">
<p>  .  </p>
<p>a timestamp in milliseconds since the Unix Epoch </p>
<p>. </p>
</td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for input. Default is transfer none."><span class="acronym">in</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.3.3.6.6.6"></a><h4>Returns</h4>
<p>a newly allocated string containing the ISO8601 version of the given timestamp </p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="zeitgeist-timestamp-from-date"></a><h3>zeitgeist_timestamp_from_date ()</h3>
<pre class="programlisting"><span class="returnvalue">gint64</span>
zeitgeist_timestamp_from_date (<em class="parameter"><code><a href="../glib/glib-Date-and-Time-Functions.html#GDate"><span class="type">GDate</span></a> *date</code></em>);</pre>
<p>Convert a <span class="bold"><strong>GDate</strong></span> to a Zeitgeist timestamp</p>
<div class="refsect3">
<a name="id-1.3.3.6.7.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>self</p></td>
<td class="parameter_description"><p>the (null) instance</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>date</p></td>
<td class="parameter_description">
<p>  .  </p>
<p>the date to convert </p>
<p>. </p>
</td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for input. Default is transfer none."><span class="acronym">in</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.3.3.6.7.6"></a><h4>Returns</h4>
<p>the given date expressed as a timestamp in milliseconds since the Epoch. The timestamp is guaranteed to be roudned off to the midnight of the given date. </p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="zeitgeist-timestamp-from-dmy"></a><h3>zeitgeist_timestamp_from_dmy ()</h3>
<pre class="programlisting"><span class="returnvalue">gint64</span>
zeitgeist_timestamp_from_dmy (<em class="parameter"><code><a href="../glib/glib-Date-and-Time-Functions.html#GDateDay"><span class="type">GDateDay</span></a> day</code></em>,
                              <em class="parameter"><code><a href="../glib/glib-Date-and-Time-Functions.html#GDateMonth"><span class="type">GDateMonth</span></a> month</code></em>,
                              <em class="parameter"><code><a href="../glib/glib-Date-and-Time-Functions.html#GDateYear"><span class="type">GDateYear</span></a> year</code></em>);</pre>
<p>Convert a day, month, year tuple into a Zeitgeist timestamp</p>
<div class="refsect3">
<a name="id-1.3.3.6.8.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>self</p></td>
<td class="parameter_description"><p>the (null) instance</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>day</p></td>
<td class="parameter_description">
<p>  .  </p>
<p>the day of the month </p>
<p>. </p>
</td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for input. Default is transfer none."><span class="acronym">in</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>month</p></td>
<td class="parameter_description">
<p>  .  </p>
<p>the month of the year </p>
<p>. </p>
</td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for input. Default is transfer none."><span class="acronym">in</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>year</p></td>
<td class="parameter_description">
<p>  .  </p>
<p>the year </p>
<p>. </p>
</td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for input. Default is transfer none."><span class="acronym">in</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.3.3.6.8.6"></a><h4>Returns</h4>
<p>the given date (rounded off to the midnight), expressed as a timestamp in milliseconds since the Epoch, or -1 in case the provided parameters don't constitute a valid date. </p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="zeitgeist-timestamp-to-date"></a><h3>zeitgeist_timestamp_to_date ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
zeitgeist_timestamp_to_date (<em class="parameter"><code><span class="type">gint64</span> timestamp</code></em>,
                             <em class="parameter"><code><a href="../glib/glib-Date-and-Time-Functions.html#GDate"><span class="type">GDate</span></a> *result</code></em>);</pre>
<p>Write a timestamp to a <a href="../glib/glib-Date-and-Time-Functions.html#GDate"><span class="type">GDate</span></a> structure</p>
<div class="refsect3">
<a name="id-1.3.3.6.9.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>self</p></td>
<td class="parameter_description"><p>the (null) instance</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>timestamp</p></td>
<td class="parameter_description">
<p>  .  </p>
<p>to convert </p>
<p>. </p>
</td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for input. Default is transfer none."><span class="acronym">in</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.3.3.6.9.6"></a><h4>Returns</h4>
<p><a href="../glib/glib-Date-and-Time-Functions.html#GDate"><span class="type">GDate</span></a> initialized to the given timestamp </p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="zeitgeist-timestamp-next-midnight"></a><h3>zeitgeist_timestamp_next_midnight ()</h3>
<pre class="programlisting"><span class="returnvalue">gint64</span>
zeitgeist_timestamp_next_midnight (<em class="parameter"><code><span class="type">gint64</span> timestamp</code></em>);</pre>
<p>Calculate the timestamp for the next midnight after the given timestamp.</p>
<p>If is is already midnight (down to the millisecond), this method will return the value for the next midnight. In other words, you can call this method recursively in order to iterate, forwards in time, over midnights.</p>
<div class="refsect3">
<a name="id-1.3.3.6.10.6"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>self</p></td>
<td class="parameter_description"><p>the (null) instance</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>timestamp</p></td>
<td class="parameter_description">
<p>  .  </p>
<p>the Zeitgeist timestamp to find the next midnight for </p>
<p>. </p>
</td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for input. Default is transfer none."><span class="acronym">in</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.3.3.6.10.7"></a><h4>Returns</h4>
<p>the timestamp for the next midnight after the given timestamp </p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="zeitgeist-timestamp-prev-midnight"></a><h3>zeitgeist_timestamp_prev_midnight ()</h3>
<pre class="programlisting"><span class="returnvalue">gint64</span>
zeitgeist_timestamp_prev_midnight (<em class="parameter"><code><span class="type">gint64</span> timestamp</code></em>);</pre>
<p>Calculate the timestamp for the midnight just before the given timestamp.</p>
<p>If is is already midnight (down to the millisecond), this method will return the value for the previous midnight. In other words, you can call this method recursively in order to iterate, backwards in time, over midnights.</p>
<div class="refsect3">
<a name="id-1.3.3.6.11.6"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>self</p></td>
<td class="parameter_description"><p>the (null) instance</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>timestamp</p></td>
<td class="parameter_description">
<p>  .  </p>
<p>the Zeitgeist timestamp to find the previous midnight for </p>
<p>. </p>
</td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for input. Default is transfer none."><span class="acronym">in</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.3.3.6.11.7"></a><h4>Returns</h4>
<p>the timestamp for the midnight just before the given timestamp </p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="ZEITGEIST-TIMESTAMP-SECOND:CAPS"></a><h3>ZEITGEIST_TIMESTAMP_SECOND</h3>
<pre class="programlisting">#define ZEITGEIST_TIMESTAMP_SECOND ((gint64) 1000)
</pre>
<p>A second represented as a Zeitgeist timestamp (ie. 1000ms)</p>
</div>
<hr>
<div class="refsect2">
<a name="ZEITGEIST-TIMESTAMP-MINUTE:CAPS"></a><h3>ZEITGEIST_TIMESTAMP_MINUTE</h3>
<pre class="programlisting">#define ZEITGEIST_TIMESTAMP_MINUTE ((gint64) 60000)
</pre>
<p>A minute represented as a Zeitgeist timestamp (ie. 60000ms)</p>
</div>
<hr>
<div class="refsect2">
<a name="ZEITGEIST-TIMESTAMP-HOUR:CAPS"></a><h3>ZEITGEIST_TIMESTAMP_HOUR</h3>
<pre class="programlisting">#define ZEITGEIST_TIMESTAMP_HOUR ((gint64) 3600000)
</pre>
<p>An hour represented as a Zeitgeist timestamp (ie. 3600000ms)</p>
</div>
<hr>
<div class="refsect2">
<a name="ZEITGEIST-TIMESTAMP-DAY:CAPS"></a><h3>ZEITGEIST_TIMESTAMP_DAY</h3>
<pre class="programlisting">#define ZEITGEIST_TIMESTAMP_DAY ((gint64) 86400000)
</pre>
<p>A day represented as a Zeitgeist timestamp (ie. 86400000ms)</p>
</div>
<hr>
<div class="refsect2">
<a name="ZEITGEIST-TIMESTAMP-WEEK:CAPS"></a><h3>ZEITGEIST_TIMESTAMP_WEEK</h3>
<pre class="programlisting">#define ZEITGEIST_TIMESTAMP_WEEK ((gint64) 604800000)
</pre>
<p>A week represented as a Zeitgeist timestamp (ie. 604800000ms)</p>
</div>
</div>
<div class="refsect1">
<a name="zeitgeist-2.0-timestamp.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="ZEITGEIST-TIMESTAMP-YEAR:CAPS"></a><h3>ZEITGEIST_TIMESTAMP_YEAR</h3>
<pre class="programlisting">#define ZEITGEIST_TIMESTAMP_YEAR 31556952000LL
</pre>
<p>A year represented as a Zeitgeist timestamp (ie. 31556952000ms). Be warned that a year is not 365 days, but in fact 365.2425 days, to account for leap years.</p>
</div>
</div>
</div>
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