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 ]]>
