38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>D.�Code for XPath Example</title><meta name="generator" content="DocBook XSL Stylesheets V1.61.2"><link rel="home" href="index.html" title="Libxml Tutorial"><link rel="up" href="index.html" title="Libxml Tutorial"><link rel="previous" href="apc.html" title="C.�Code for Keyword Example"><link rel="next" href="ape.html" title="E.�Code for Add Keyword Example"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">D.�Code for XPath Example</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="apc.html">Prev</a>�</td><th width="60%" align="center">�</th><td width="20%" align="right">�<a accesskey="n" href="ape.html">Next</a></td></tr></table><hr></div><div class="appendix" lang="en"><div class="titlepage"><div><div><h2 class="title"><a name="xpathappendix"></a>D.�Code for XPath Example</h2></div></div><div></div></div><p>
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsyncgetdoc (char *docname) {
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync xmlDocPtr doc;
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync doc = xmlParseFile(docname);
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync if (doc == NULL ) {
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync fprintf(stderr,"Document not parsed successfully. \n");
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync return NULL;
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync return doc;
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsyncxmlXPathObjectPtr
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsyncgetnodeset (xmlDocPtr doc, xmlChar *xpath){
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync xmlXPathContextPtr context;
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync xmlXPathObjectPtr result;
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync context = xmlXPathNewContext(doc);
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync if (context == NULL) {
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync printf("Error in xmlXPathNewContext\n");
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync return NULL;
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync result = xmlXPathEvalExpression(xpath, context);
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync xmlXPathFreeContext(context);
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync if (result == NULL) {
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync printf("Error in xmlXPathEvalExpression\n");
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync return NULL;
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync if(xmlXPathNodeSetIsEmpty(result->nodesetval)){
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync xmlXPathFreeObject(result);
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync printf("No result\n");
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync return NULL;
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync return result;
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsyncmain(int argc, char **argv) {
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync char *docname;
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync xmlDocPtr doc;
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync xmlChar *xpath = (xmlChar*) "//keyword";
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync xmlNodeSetPtr nodeset;
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync xmlXPathObjectPtr result;
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync xmlChar *keyword;
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync if (argc <= 1) {
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync printf("Usage: %s docname\n", argv[0]);
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync docname = argv[1];
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync doc = getdoc(docname);
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync result = getnodeset (doc, xpath);
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync if (result) {
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync nodeset = result->nodesetval;
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync for (i=0; i < nodeset->nodeNr; i++) {
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync keyword = xmlNodeListGetString(doc, nodeset->nodeTab[i]->xmlChildrenNode, 1);
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync printf("keyword: %s\n", keyword);
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync xmlFree(keyword);
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync xmlXPathFreeObject (result);
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync xmlFreeDoc(doc);
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync xmlCleanupParser();
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync return (1);
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync </p></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="apc.html">Prev</a>�</td><td width="20%" align="center"><a accesskey="u" href="index.html">Up</a></td><td width="40%" align="right">�<a accesskey="n" href="ape.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">C.�Code for Keyword Example�</td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top">�E.�Code for Add Keyword Example</td></tr></table></div></body></html>