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