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<a href="#libbonobo-bonobo-exception.description" class="shortcut">Description</a>
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<div class="refentry" title="bonobo-exception">
<a name="libbonobo-bonobo-exception"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="libbonobo-bonobo-exception.top_of_page"></a>bonobo-exception</span></h2>
<p>bonobo-exception — maps CORBA exceptions to user readable text, + helper macros</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv" title="Synopsis">
<a name="libbonobo-bonobo-exception.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">#define <a class="link" href="libbonobo-bonobo-exception.html#bonobo-exception-set" title="bonobo_exception_set()">bonobo_exception_set</a> (opt_ev,
repo_id)
#define <a class="link" href="libbonobo-bonobo-exception.html#bonobo-return-if-fail" title="bonobo_return_if_fail()">bonobo_return_if_fail</a> (expr,
opt_ev)
#define <a class="link" href="libbonobo-bonobo-exception.html#bonobo-return-val-if-fail" title="bonobo_return_val_if_fail()">bonobo_return_val_if_fail</a> (expr,
val,
opt_ev)
#define <a class="link" href="libbonobo-bonobo-exception.html#BONOBO-EX:CAPS" title="BONOBO_EX()">BONOBO_EX</a> (ev)
#define <a class="link" href="libbonobo-bonobo-exception.html#BONOBO-USER-EX:CAPS" title="BONOBO_USER_EX()">BONOBO_USER_EX</a> (ev,
id)
#define <a class="link" href="libbonobo-bonobo-exception.html#BONOBO-EX-REPOID:CAPS" title="BONOBO_EX_REPOID()">BONOBO_EX_REPOID</a> (ev)
#define <a class="link" href="libbonobo-bonobo-exception.html#BONOBO-RET-EX:CAPS" title="BONOBO_RET_EX()">BONOBO_RET_EX</a> (ev)
#define <a class="link" href="libbonobo-bonobo-exception.html#BONOBO-RET-VAL-EX:CAPS" title="BONOBO_RET_VAL_EX()">BONOBO_RET_VAL_EX</a> (ev,
v)
<span class="returnvalue">char</span> * (<a class="link" href="libbonobo-bonobo-exception.html#BonoboExceptionFn" title="BonoboExceptionFn ()">*BonoboExceptionFn</a>) (<em class="parameter"><code><span class="type">CORBA_Environment</span> *ev</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);
<span class="returnvalue">char</span> * <a class="link" href="libbonobo-bonobo-exception.html#bonobo-exception-get-text" title="bonobo_exception_get_text ()">bonobo_exception_get_text</a> (<em class="parameter"><code><span class="type">CORBA_Environment</span> *ev</code></em>);
<span class="returnvalue">char</span> * <a class="link" href="libbonobo-bonobo-exception.html#bonobo-exception-repoid-to-text" title="bonobo_exception_repoid_to_text ()">bonobo_exception_repoid_to_text</a> (<em class="parameter"><code>const <span class="type">char</span> *repo_id</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libbonobo-bonobo-exception.html#bonobo-exception-add-handler-str" title="bonobo_exception_add_handler_str ()">bonobo_exception_add_handler_str</a> (<em class="parameter"><code>const <span class="type">char</span> *repo_id</code></em>,
<em class="parameter"><code>const <span class="type">char</span> *str</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libbonobo-bonobo-exception.html#bonobo-exception-add-handler-fn" title="bonobo_exception_add_handler_fn ()">bonobo_exception_add_handler_fn</a> (<em class="parameter"><code>const <span class="type">char</span> *repo_id</code></em>,
<em class="parameter"><code><a class="link" href="libbonobo-bonobo-exception.html#BonoboExceptionFn" title="BonoboExceptionFn ()"><span class="type">BonoboExceptionFn</span></a> fn</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> destroy_fn</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libbonobo-bonobo-exception.html#bonobo-exception-general-error-set" title="bonobo_exception_general_error_set ()">bonobo_exception_general_error_set</a> (<em class="parameter"><code><span class="type">CORBA_Environment</span> *ev</code></em>,
<em class="parameter"><code><span class="type">CORBA_TypeCode</span> opt_deriv</code></em>,
<em class="parameter"><code>const <span class="type">char</span> *format</code></em>,
<em class="parameter"><code>...</code></em>);
const <span class="returnvalue">char</span> * <a class="link" href="libbonobo-bonobo-exception.html#bonobo-exception-general-error-get" title="bonobo_exception_general_error_get ()">bonobo_exception_general_error_get</a> (<em class="parameter"><code><span class="type">CORBA_Environment</span> *ev</code></em>);
</pre>
</div>
<div class="refsect1" title="Description">
<a name="libbonobo-bonobo-exception.description"></a><h2>Description</h2>
<p>
This module contains some useful helper functions
that can be used to set various exceptions inside your
CORBA methods. It also contains code to map between
complex CORBA_Environment exceptions and helpful
strings suitable for display to the user.
</p>
<p>
Typically to test for exceptions the BONOBO_EX macro
is used thus:
</p>
<div class="example">
<a name="id338070"></a><p class="title"><b>Example 4. Bonobo exception trapping and reporting</b></p>
<div class="example-contents">
<table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<td class="listing_lines" align="right"><pre>1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18</pre></td>
<td class="listing_code"><pre class="programlisting"><span class="gtkdoc kwb">int</span>
<span class="function">do_something</span> <span class="symbol">(</span>CORBA_Environment <span class="symbol">*</span>ev<span class="symbol">)</span>
<span class="symbol">{</span>
<span class="symbol">...</span>
retval <span class="symbol">=</span> <span class="function">Foo_Baa_method</span> <span class="symbol">(</span>object<span class="symbol">,</span> ev<span class="symbol">);</span>
<span class="keyword">if</span> <span class="symbol">(</span><span class="function"><a href="libbonobo-bonobo-exception.html#BONOBO-EX:CAPS">BONOBO_EX</a></span> <span class="symbol">(</span>ev<span class="symbol">)) {</span>
<span class="keyword">if</span> <span class="symbol">(</span><span class="function"><a href="libbonobo-bonobo-exception.html#BONOBO-USER-EX:CAPS">BONOBO_USER_EX</a></span> <span class="symbol">(</span>ev<span class="symbol">,</span> ex_CosNaming_NamingContext_NotFound<span class="symbol">)) {</span>
<span class="function"><a href="/usr/share/gtk-doc/html/glib/glib-Message-Logging.html#g-warning">g_warning</a></span> <span class="symbol">(</span><span class="string">"Not found"</span><span class="symbol">);</span>
<span class="symbol">}</span> <span class="keyword">else</span> <span class="symbol">{</span>
<span class="gtkdoc kwb">char</span> <span class="symbol">*</span>str<span class="symbol">;</span>
<span class="function"><a href="/usr/share/gtk-doc/html/glib/glib-Message-Logging.html#g-warning">g_warning</a></span> <span class="symbol">(</span><span class="string">"Exception '%s' occured"</span><span class="symbol">,</span>
<span class="symbol">(</span>str <span class="symbol">=</span> <span class="function"><a href="libbonobo-bonobo-exception.html#bonobo-exception-get-text">bonobo_exception_get_text</a></span> <span class="symbol">(</span>ev<span class="symbol">)));</span>
<span class="function"><a href="/usr/share/gtk-doc/html/glib/glib-Memory-Allocation.html#g-free">g_free</a></span> <span class="symbol">(</span>str<span class="symbol">);</span>
<span class="symbol">}</span>
<span class="keyword">return</span> <span class="symbol">-</span><span class="number">1</span><span class="symbol">;</span>
<span class="symbol">}</span>
<span class="symbol">...</span>
<span class="symbol">}</span></pre></td>
</tr>
</tbody>
</table>
</div>
</div>
<p><br class="example-break">
</p>
</div>
<div class="refsect1" title="Details">
<a name="libbonobo-bonobo-exception.details"></a><h2>Details</h2>
<div class="refsect2" title="bonobo_exception_set()">
<a name="bonobo-exception-set"></a><h3>bonobo_exception_set()</h3>
<pre class="programlisting">#define bonobo_exception_set(opt_ev,repo_id)</pre>
<p>
This macro sets the stateless user exception with <em class="parameter"><code>repo_id</code></em> on
<em class="parameter"><code>opt_ev</code></em> or warns if <em class="parameter"><code>opt_ev</code></em> == NULL
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>opt_ev</code></em> :</span></p></td>
<td>an optional corba exception environment.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>repo_id</code></em> :</span></p></td>
<td>repoid of the exception to set.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="bonobo_return_if_fail()">
<a name="bonobo-return-if-fail"></a><h3>bonobo_return_if_fail()</h3>
<pre class="programlisting">#define bonobo_return_if_fail(expr,opt_ev)</pre>
<p>
this macro is used for bonobo preconditons on argument types,
usualy inside skels if <em class="parameter"><code>expr</code></em> is FALSE a warning is printed and
<em class="parameter"><code>opt_ev</code></em> is set to ex_Bonobo_BadArg.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>expr</code></em> :</span></p></td>
<td>an expression that should be true
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>opt_ev</code></em> :</span></p></td>
<td>an optional corba exception environment.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="bonobo_return_val_if_fail()">
<a name="bonobo-return-val-if-fail"></a><h3>bonobo_return_val_if_fail()</h3>
<pre class="programlisting">#define bonobo_return_val_if_fail(expr,val,opt_ev)</pre>
<p>
this macro is used for bonobo preconditons on argument types,
usualy inside skels if <em class="parameter"><code>expr</code></em> is FALSE a warning is printed and
<em class="parameter"><code>opt_ev</code></em> is set to ex_Bonobo_BadArg.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>expr</code></em> :</span></p></td>
<td>an expression that should be true
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>val</code></em> :</span></p></td>
<td>a value to return on failure.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>opt_ev</code></em> :</span></p></td>
<td>an optional corba exception environment.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="BONOBO_EX()">
<a name="BONOBO-EX:CAPS"></a><h3>BONOBO_EX()</h3>
<pre class="programlisting">#define BONOBO_EX(ev) ((ev) != NULL && (ev)->_major != CORBA_NO_EXCEPTION)
</pre>
<p>
This macro returns TRUE if <em class="parameter"><code>ev</code></em> flags an exception.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>ev</code></em> :</span></p></td>
<td>the exception environment
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="BONOBO_USER_EX()">
<a name="BONOBO-USER-EX:CAPS"></a><h3>BONOBO_USER_EX()</h3>
<pre class="programlisting">#define BONOBO_USER_EX(ev,id)</pre>
<p>
This macro returns TRUE if <em class="parameter"><code>ev</code></em> contains a user exception
of type <em class="parameter"><code>id</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>ev</code></em> :</span></p></td>
<td>the exception environment
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>id</code></em> :</span></p></td>
<td>the repo_id of the exception
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="BONOBO_EX_REPOID()">
<a name="BONOBO-EX-REPOID:CAPS"></a><h3>BONOBO_EX_REPOID()</h3>
<pre class="programlisting">#define BONOBO_EX_REPOID(ev) (ev)->_id
</pre>
<p>
Returns the repoid string of exception <em class="parameter"><code>ev</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>ev</code></em> :</span></p></td>
<td>a CORBA exception
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="BONOBO_RET_EX()">
<a name="BONOBO-RET-EX:CAPS"></a><h3>BONOBO_RET_EX()</h3>
<pre class="programlisting">#define BONOBO_RET_EX(ev)</pre>
<p>
returns if there is an exception flagged in <em class="parameter"><code>ev</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>ev</code></em> :</span></p></td>
<td>the exception environment
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="BONOBO_RET_VAL_EX()">
<a name="BONOBO-RET-VAL-EX:CAPS"></a><h3>BONOBO_RET_VAL_EX()</h3>
<pre class="programlisting">#define BONOBO_RET_VAL_EX(ev,v)</pre>
<p>
returns <em class="parameter"><code>v</code></em> if there is an exception flagged in <em class="parameter"><code>ev</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>ev</code></em> :</span></p></td>
<td>the exception environment
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>v</code></em> :</span></p></td>
<td>the value to return
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="BonoboExceptionFn ()">
<a name="BonoboExceptionFn"></a><h3>BonoboExceptionFn ()</h3>
<pre class="programlisting"><span class="returnvalue">char</span> * (*BonoboExceptionFn) (<em class="parameter"><code><span class="type">CORBA_Environment</span> *ev</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
<p>
The prototype for user registerable exception decoders.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>ev</code></em> :</span></p></td>
<td>the exception environment
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>user data to be passed to the function
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a g_malloc'd copy of a translated user readable error string.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="bonobo_exception_get_text ()">
<a name="bonobo-exception-get-text"></a><h3>bonobo_exception_get_text ()</h3>
<pre class="programlisting"><span class="returnvalue">char</span> * bonobo_exception_get_text (<em class="parameter"><code><span class="type">CORBA_Environment</span> *ev</code></em>);</pre>
<p>
Returns a user readable description of the exception. First
checks <em class="parameter"><code>ev</code></em> against builtin Bonobo exceptions, then falls back to
exception names added through bonobo_exception_add_handler_str
or bonobo_exception_add_handler_fn.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>ev</code></em> :</span></p></td>
<td>the corba environment.
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> A g_malloc'd description, which the caller must free.
NULL is never returned.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="bonobo_exception_repoid_to_text ()">
<a name="bonobo-exception-repoid-to-text"></a><h3>bonobo_exception_repoid_to_text ()</h3>
<pre class="programlisting"><span class="returnvalue">char</span> * bonobo_exception_repoid_to_text (<em class="parameter"><code>const <span class="type">char</span> *repo_id</code></em>);</pre>
<p>
This maps builtin bonobo exceptions that the system
knows about to user readable strings.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>repo_id</code></em> :</span></p></td>
<td>exception repository id
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> a user string or NULL for an unknown repo_id
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="bonobo_exception_add_handler_str ()">
<a name="bonobo-exception-add-handler-str"></a><h3>bonobo_exception_add_handler_str ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> bonobo_exception_add_handler_str (<em class="parameter"><code>const <span class="type">char</span> *repo_id</code></em>,
<em class="parameter"><code>const <span class="type">char</span> *str</code></em>);</pre>
<p>
This routine adds a simple string mapping for an exception
with repository id <em class="parameter"><code>repo_id</code></em>, such that when we call
bonobo_exception_get_text on an exception of id <em class="parameter"><code>repo_id</code></em> we
get <em class="parameter"><code>str</code></em> back.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>repo_id</code></em> :</span></p></td>
<td>exception repository id
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>str</code></em> :</span></p></td>
<td>the user readable, translated exception text.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="bonobo_exception_add_handler_fn ()">
<a name="bonobo-exception-add-handler-fn"></a><h3>bonobo_exception_add_handler_fn ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> bonobo_exception_add_handler_fn (<em class="parameter"><code>const <span class="type">char</span> *repo_id</code></em>,
<em class="parameter"><code><a class="link" href="libbonobo-bonobo-exception.html#BonoboExceptionFn" title="BonoboExceptionFn ()"><span class="type">BonoboExceptionFn</span></a> fn</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> destroy_fn</code></em>);</pre>
<p>
This routine adds a method mapping for an exception
with repository id <em class="parameter"><code>repo_id</code></em>, such that when we call
bonobo_exception_get_text on an exception of id <em class="parameter"><code>repo_id</code></em>
the <em class="parameter"><code>fn</code></em> is called and passed <em class="parameter"><code>user_data</code></em>.
When the handler is removed the <em class="parameter"><code>destroy_fn</code></em> is called
on its <em class="parameter"><code>user_data</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>repo_id</code></em> :</span></p></td>
<td>exception repository id
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>fn</code></em> :</span></p></td>
<td>function to make exception human readable
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>the user data
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>destroy_fn</code></em> :</span></p></td>
<td>user data destroy function or NULL.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="bonobo_exception_general_error_set ()">
<a name="bonobo-exception-general-error-set"></a><h3>bonobo_exception_general_error_set ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> bonobo_exception_general_error_set (<em class="parameter"><code><span class="type">CORBA_Environment</span> *ev</code></em>,
<em class="parameter"><code><span class="type">CORBA_TypeCode</span> opt_deriv</code></em>,
<em class="parameter"><code>const <span class="type">char</span> *format</code></em>,
<em class="parameter"><code>...</code></em>);</pre>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>ev</code></em> :</span></p></td>
<td>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>opt_deriv</code></em> :</span></p></td>
<td>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>format</code></em> :</span></p></td>
<td>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>...</code></em> :</span></p></td>
<td>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="bonobo_exception_general_error_get ()">
<a name="bonobo-exception-general-error-get"></a><h3>bonobo_exception_general_error_get ()</h3>
<pre class="programlisting">const <span class="returnvalue">char</span> * bonobo_exception_general_error_get (<em class="parameter"><code><span class="type">CORBA_Environment</span> *ev</code></em>);</pre>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>ev</code></em> :</span></p></td>
<td>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
</td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
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