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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<a href="#grits-grits-data.synopsis" class="shortcut">Top</a>
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                  <a href="#grits-grits-data.description" class="shortcut">Description</a>
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<div class="refentry">
<a name="grits-grits-data"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="grits-grits-data.top_of_page"></a>grits-data</span></h2>
<p>grits-data — Miscellaneous utilities for data access</p>
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<div class="refsynopsisdiv">
<a name="grits-grits-data.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include &lt;glib/gstdio.h&gt;

enum                <a class="link" href="grits-grits-data.html#GritsCacheType" title="enum GritsCacheType">GritsCacheType</a>;
<span class="returnvalue">void</span>                (<a class="link" href="grits-grits-data.html#GritsChunkCallback" title="GritsChunkCallback ()">*GritsChunkCallback</a>)               (<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *file</code></em>,
                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#goffset"><span class="type">goffset</span></a> cur</code></em>,
                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#goffset"><span class="type">goffset</span></a> total</code></em>,
                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);
<span class="returnvalue">FILE</span> *              <a class="link" href="grits-grits-data.html#fopen-p" title="fopen_p ()">fopen_p</a>                             (<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *path</code></em>,
                                                         <em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *mode</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="grits-grits-data.description"></a><h2>Description</h2>
<p>
Various support routines for data access,
these are mostly related to disk caching.
</p>
</div>
<div class="refsect1">
<a name="grits-grits-data.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GritsCacheType"></a><h3>enum GritsCacheType</h3>
<pre class="programlisting">typedef enum {
	GRITS_LOCAL,
	GRITS_ONCE,
	GRITS_UPDATE,
	GRITS_REFRESH,
} GritsCacheType;
</pre>
<p>
Various methods for caching data
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
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<td><p><a name="GRITS-LOCAL:CAPS"></a><span class="term"><code class="literal">GRITS_LOCAL</code></span></p></td>
<td>Only return local files (for offline mode)
</td>
</tr>
<tr>
<td><p><a name="GRITS-ONCE:CAPS"></a><span class="term"><code class="literal">GRITS_ONCE</code></span></p></td>
<td>Download the file only if it does not exist
</td>
</tr>
<tr>
<td><p><a name="GRITS-UPDATE:CAPS"></a><span class="term"><code class="literal">GRITS_UPDATE</code></span></p></td>
<td>Update the file to be like the server
</td>
</tr>
<tr>
<td><p><a name="GRITS-REFRESH:CAPS"></a><span class="term"><code class="literal">GRITS_REFRESH</code></span></p></td>
<td>Delete the existing file and fetch a new copy
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GritsChunkCallback"></a><h3>GritsChunkCallback ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                (*GritsChunkCallback)               (<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *file</code></em>,
                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#goffset"><span class="type">goffset</span></a> cur</code></em>,
                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#goffset"><span class="type">goffset</span></a> total</code></em>,
                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
<p>
Function called when part of a file is fetched
Used for updating progress bars, etc
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
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<td><p><span class="term"><em class="parameter"><code>file</code></em> :</span></p></td>
<td>path to the file which is being fetched</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>cur</code></em> :</span></p></td>
<td>current offset in the file</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>total</code></em> :</span></p></td>
<td>total size of the file</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>the user_data argument passed to the function</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="fopen-p"></a><h3>fopen_p ()</h3>
<pre class="programlisting"><span class="returnvalue">FILE</span> *              fopen_p                             (<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *path</code></em>,
                                                         <em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *mode</code></em>);</pre>
<p>
Open a file, creating parent directories if needed
</p>
<div class="variablelist"><table border="0" class="variablelist">
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<td><p><span class="term"><em class="parameter"><code>path</code></em> :</span></p></td>
<td>the path to the file to be opened.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>mode</code></em> :</span></p></td>
<td>mode to open the file, see <code class="function">fopen</code> for details</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the opened file descriptor</td>
</tr>
</tbody>
</table></div>
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