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<a href="#func-members">Functions</a> </div>
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<h1>Core library operations</h1> </div>
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Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__core.html#ga6ca82e6e91d1b8ff4806f1955006842a">fp_set_debug</a> (int level)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set message verbosity. <a href="#ga6ca82e6e91d1b8ff4806f1955006842a"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__core.html#ga5772cdd0a4354e2b53b18a02ce523ddc">fp_init</a> (void)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Initialise libfprint. <a href="#ga5772cdd0a4354e2b53b18a02ce523ddc"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__core.html#ga47011a58c8a38aa51b329640765815b1">fp_exit</a> (void)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Deinitialise libfprint. <a href="#ga47011a58c8a38aa51b329640765815b1"></a><br/></td></tr>
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<hr/><h2>Function Documentation</h2>
<a class="anchor" id="ga6ca82e6e91d1b8ff4806f1955006842a"></a><!-- doxytag: member="core.c::fp_set_debug" ref="ga6ca82e6e91d1b8ff4806f1955006842a" args="(int level)" -->
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<td class="memname">void fp_set_debug </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"> <em>level</em></td>
<td> ) </td>
<td></td>
</tr>
</table>
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<div class="memdoc">
<p>Set message verbosity. </p>
<ul>
<li>Level 0: no messages ever printed by the library (default)</li>
<li>Level 1: error messages are printed to stderr</li>
<li>Level 2: warning and error messages are printed to stderr</li>
<li>Level 3: informational messages are printed to stdout, warning and error messages are printed to stderr</li>
</ul>
<p>The default level is 0, which means no messages are ever printed. If you choose to increase the message verbosity level, ensure that your application does not close the stdout/stderr file descriptors.</p>
<p>You are advised to set level 3. libfprint is conservative with its message logging and most of the time, will only log messages that explain error conditions and other oddities. This will help you debug your software.</p>
<p>If the LIBFPRINT_DEBUG environment variable was set when libfprint was initialized, this function does nothing: the message verbosity is fixed to the value in the environment variable.</p>
<p>If libfprint was compiled without any message logging, this function does nothing: you'll never get any messages.</p>
<p>If libfprint was compiled with verbose debug message logging, this function does nothing: you'll always get messages from all levels.</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>ctx</em> </td><td>the context to operate on, or NULL for the default context </td></tr>
<tr><td valign="top"></td><td valign="top"><em>level</em> </td><td>debug level to set </td></tr>
</table>
</dd>
</dl>
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<a class="anchor" id="ga5772cdd0a4354e2b53b18a02ce523ddc"></a><!-- doxytag: member="core.c::fp_init" ref="ga5772cdd0a4354e2b53b18a02ce523ddc" args="(void)" -->
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<td class="memname">int fp_init </td>
<td>(</td>
<td class="paramtype">void </td>
<td class="paramname"></td>
<td> ) </td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Initialise libfprint. </p>
<p>This function must be called before you attempt to use the library in any way. </p>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 on success, non-zero on error. </dd></dl>
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<a class="anchor" id="ga47011a58c8a38aa51b329640765815b1"></a><!-- doxytag: member="core.c::fp_exit" ref="ga47011a58c8a38aa51b329640765815b1" args="(void)" -->
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<td class="memname">void fp_exit </td>
<td>(</td>
<td class="paramtype">void </td>
<td class="paramname"></td>
<td> ) </td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Deinitialise libfprint. </p>
<p>This function should be called during your program exit sequence. You must not use any libfprint functions after calling this function, unless you call <a class="el" href="group__core.html#ga5772cdd0a4354e2b53b18a02ce523ddc" title="Initialise libfprint.">fp_init()</a> again. </p>
<p>References <a class="el" href="group__dev.html#gaa073e271cfbbea1fecc3e4fc6abb7299">fp_dev_close()</a>.</p>
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