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Diffstat (limited to 'doc/tutorial/ar01s05.html')
| -rw-r--r-- | doc/tutorial/ar01s05.html | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/doc/tutorial/ar01s05.html b/doc/tutorial/ar01s05.html index 04acc01..1c40925 100644 --- a/doc/tutorial/ar01s05.html +++ b/doc/tutorial/ar01s05.html @@ -26,13 +26,12 @@ <a name="cocreatecontext"></a><img src="images/callouts/2.png" alt="2" border="0">context = xmlXPathNewContext(doc); <a name="corunxpath"></a><img src="images/callouts/3.png" alt="3" border="0">result = xmlXPathEvalExpression(xpath, context); <a name="cocheckxpathresult"></a><img src="images/callouts/4.png" alt="4" border="0">if(xmlXPathNodeSetIsEmpty(result->nodesetval)){ + xmlXPathFreeObject(result); printf("No result\n"); - return NULL; - } - xmlXPathFreeContext(context); - return result; + return NULL; </pre><p> - </p><div class="calloutlist"><table border="0" summary="Callout list"><tr><td width="5%" valign="top" align="left"><a href="#cocontext"><img src="images/callouts/1.png" alt="1" border="0"></a> </td><td valign="top" align="left"><p>First we declare our variables.</p></td></tr><tr><td width="5%" valign="top" align="left"><a href="#cocreatecontext"><img src="images/callouts/2.png" alt="2" border="0"></a> </td><td valign="top" align="left"><p>Initialize the <tt class="varname">context</tt> variable.</p></td></tr><tr><td width="5%" valign="top" align="left"><a href="#corunxpath"><img src="images/callouts/3.png" alt="3" border="0"></a> </td><td valign="top" align="left"><p>Apply the <span class="application">XPath</span> expression.</p></td></tr><tr><td width="5%" valign="top" align="left"><a href="#cocheckxpathresult"><img src="images/callouts/4.png" alt="4" border="0"></a> </td><td valign="top" align="left"><p>Check the result.</p></td></tr></table></div><p> + </p><div class="calloutlist"><table border="0" summary="Callout list"><tr><td width="5%" valign="top" align="left"><a href="#cocontext"><img src="images/callouts/1.png" alt="1" border="0"></a> </td><td valign="top" align="left"><p>First we declare our variables.</p></td></tr><tr><td width="5%" valign="top" align="left"><a href="#cocreatecontext"><img src="images/callouts/2.png" alt="2" border="0"></a> </td><td valign="top" align="left"><p>Initialize the <tt class="varname">context</tt> variable.</p></td></tr><tr><td width="5%" valign="top" align="left"><a href="#corunxpath"><img src="images/callouts/3.png" alt="3" border="0"></a> </td><td valign="top" align="left"><p>Apply the <span class="application">XPath</span> expression.</p></td></tr><tr><td width="5%" valign="top" align="left"><a href="#cocheckxpathresult"><img src="images/callouts/4.png" alt="4" border="0"></a> </td><td valign="top" align="left"><p>Check the result and free the memory allocated to + <tt class="varname">result</tt> if no result is found.</p></td></tr></table></div><p> </p><p>The xmlPathObjectPtr returned by the function contains a set of nodes and other information needed to iterate through the set and act on the results. For this example, our functions returns the |