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1.1 ! misho 1: <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> ! 2: </p><pre class="programlisting"> ! 3: #include <libxml/parser.h> ! 4: #include <libxml/xpath.h> ! 5: ! 6: xmlDocPtr ! 7: getdoc (char *docname) { ! 8: xmlDocPtr doc; ! 9: doc = xmlParseFile(docname); ! 10: ! 11: if (doc == NULL ) { ! 12: fprintf(stderr,"Document not parsed successfully. \n"); ! 13: return NULL; ! 14: } ! 15: ! 16: return doc; ! 17: } ! 18: ! 19: xmlXPathObjectPtr ! 20: getnodeset (xmlDocPtr doc, xmlChar *xpath){ ! 21: ! 22: xmlXPathContextPtr context; ! 23: xmlXPathObjectPtr result; ! 24: ! 25: context = xmlXPathNewContext(doc); ! 26: if (context == NULL) { ! 27: printf("Error in xmlXPathNewContext\n"); ! 28: return NULL; ! 29: } ! 30: result = xmlXPathEvalExpression(xpath, context); ! 31: xmlXPathFreeContext(context); ! 32: if (result == NULL) { ! 33: printf("Error in xmlXPathEvalExpression\n"); ! 34: return NULL; ! 35: } ! 36: if(xmlXPathNodeSetIsEmpty(result->nodesetval)){ ! 37: xmlXPathFreeObject(result); ! 38: printf("No result\n"); ! 39: return NULL; ! 40: } ! 41: return result; ! 42: } ! 43: int ! 44: main(int argc, char **argv) { ! 45: ! 46: char *docname; ! 47: xmlDocPtr doc; ! 48: xmlChar *xpath = (xmlChar*) "//keyword"; ! 49: xmlNodeSetPtr nodeset; ! 50: xmlXPathObjectPtr result; ! 51: int i; ! 52: xmlChar *keyword; ! 53: ! 54: if (argc <= 1) { ! 55: printf("Usage: %s docname\n", argv[0]); ! 56: return(0); ! 57: } ! 58: ! 59: docname = argv[1]; ! 60: doc = getdoc(docname); ! 61: result = getnodeset (doc, xpath); ! 62: if (result) { ! 63: nodeset = result->nodesetval; ! 64: for (i=0; i < nodeset->nodeNr; i++) { ! 65: keyword = xmlNodeListGetString(doc, nodeset->nodeTab[i]->xmlChildrenNode, 1); ! 66: printf("keyword: %s\n", keyword); ! 67: xmlFree(keyword); ! 68: } ! 69: xmlXPathFreeObject (result); ! 70: } ! 71: xmlFreeDoc(doc); ! 72: xmlCleanupParser(); ! 73: return (1); ! 74: } ! 75: </pre><p> ! 76: </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>