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<a href="#libuser-error.description" class="shortcut">Description</a>
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<div class="refentry" lang="en">
<a name="libuser-error"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
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<h2><span class="refentrytitle"><a name="libuser-error.top_of_page"></a>error</span></h2>
<p>error — Functions for allocating and manipulating <span class="type">lu_error</span> structures.</p>
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<td valign="top" align="right"></td>
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<div class="refsynopsisdiv">
<a name="libuser-error.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#define <a class="link" href="libuser-error.html#LU-ERROR-CHECK--CAPS" title="LU_ERROR_CHECK()">LU_ERROR_CHECK</a> (err_p_p)
void <a class="link" href="libuser-error.html#lu-error-new" title="lu_error_new ()">lu_error_new</a> (lu_error_t **error,
lu_status_t code,
const char *fmt,
...);
void <a class="link" href="libuser-error.html#lu-error-free" title="lu_error_free ()">lu_error_free</a> (lu_error_t **error);
<a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"
>gboolean</a> <a class="link" href="libuser-error.html#lu-error-is-success" title="lu_error_is_success ()">lu_error_is_success</a> (lu_status_t status);
<a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"
>gboolean</a> <a class="link" href="libuser-error.html#lu-error-is-warning" title="lu_error_is_warning ()">lu_error_is_warning</a> (lu_status_t status);
<a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"
>gboolean</a> <a class="link" href="libuser-error.html#lu-error-is-error" title="lu_error_is_error ()">lu_error_is_error</a> (lu_status_t status);
const char * <a class="link" href="libuser-error.html#lu-strerror" title="lu_strerror ()">lu_strerror</a> (lu_error_t *error);
</pre>
</div>
<div class="refsect1" lang="en">
<a name="libuser-error.description"></a><h2>Description</h2>
<p>
<code class="filename">error.h</code> includes declarations for allocating and
manipulating <span class="type">lu_error</span> structures. These structures hold error and status
information passed between libuser, its modules, and applications.
</p>
<p>
A struct <span class="type">lu_error</span> contains an error code and a human-readable, possibly
translated error string. The error string is using the encoding specified
by <code class="literal">LC_CTYPE</code> locale category.
</p>
</div>
<div class="refsect1" lang="en">
<a name="libuser-error.details"></a><h2>Details</h2>
<div class="refsect2" lang="en">
<a name="LU-ERROR-CHECK--CAPS"></a><h3>LU_ERROR_CHECK()</h3>
<pre class="programlisting">#define LU_ERROR_CHECK(err_p_p)</pre>
<p>
Checks that the given pointer to a pointer to a struct does not already point
to a valid <span class="type">lu_error</span> structure. This macro is used by many internal functions
to check that an error has not already occurred when they are invoked.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>err_p_p</code></em> :</span></p></td>
<td>A pointer to a struct <span class="type">lu_error</span> * which will be checked. If there
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="lu-error-new"></a><h3>lu_error_new ()</h3>
<pre class="programlisting">void lu_error_new (lu_error_t **error,
lu_status_t code,
const char *fmt,
...);</pre>
<p>
Creates a new <span class="type">lu_error</span> structure.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>error</code></em> :</span></p></td>
<td>A pointer to a struct <span class="type">lu_error</span> * which will hold the newly-created
error structure. It must point to <a
href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL--CAPS"
><span class="type">NULL</span></a> before calling this function.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>code</code></em> :</span></p></td>
<td>An error code
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>fmt</code></em> :</span></p></td>
<td>Format string describing the error. If <a
href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL--CAPS"
><span class="type">NULL</span></a>, a default string is used.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>...</code></em> :</span></p></td>
<td>Arguments for <em class="parameter"><code>fmt</code></em>, if necessary
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="lu-error-free"></a><h3>lu_error_free ()</h3>
<pre class="programlisting">void lu_error_free (lu_error_t **error);</pre>
<p>
Frees an <span class="type">lu_error</span> structure.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>error</code></em> :</span></p></td>
<td>A pointer to a pointer to the structure to be freed. The pointer is set
to NULL after the error is freed.
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="lu-error-is-success"></a><h3>lu_error_is_success ()</h3>
<pre class="programlisting"><a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"
>gboolean</a> lu_error_is_success (lu_status_t status);</pre>
<p>
Check if the error code held by an error structure is a success code.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>status</code></em> :</span></p></td>
<td>An error code
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a <a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"
><span class="type">gboolean</span></a> indicating whether or not the error is a success code.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="lu-error-is-warning"></a><h3>lu_error_is_warning ()</h3>
<pre class="programlisting"><a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"
>gboolean</a> lu_error_is_warning (lu_status_t status);</pre>
<p>
Check if the error code held by an error structure is a warning code.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>status</code></em> :</span></p></td>
<td>An error code
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a <a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"
><span class="type">gboolean</span></a> indicating whether or not the error is a warning code.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="lu-error-is-error"></a><h3>lu_error_is_error ()</h3>
<pre class="programlisting"><a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"
>gboolean</a> lu_error_is_error (lu_status_t status);</pre>
<p>
Check if the error code held by an error structure is an error code.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>status</code></em> :</span></p></td>
<td>An error code
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a <a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"
><span class="type">gboolean</span></a> indicating whether or not the error is an error code.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="lu-strerror"></a><h3>lu_strerror ()</h3>
<pre class="programlisting">const char * lu_strerror (lu_error_t *error);</pre>
<p>
Converts an <span class="type">lu_error</span> structure to a string describing the error.
If the <em class="parameter"><code>error->string</code></em> is <a
href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL--CAPS"
><code class="literal">NULL</code></a>, returns a text representation of
<em class="parameter"><code>error->code</code></em>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>error</code></em> :</span></p></td>
<td>An error
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>error string valid at least until <em class="parameter"><code>error</code></em> is freed.
</td>
</tr>
</tbody>
</table></div>
</div>
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