// QueryNumber evaluates an xpath expressions that returns a number
func (xp *Xp) QueryNumber(context *C.xmlNode, path string) (val int) {
var xmlXPathObject *C.xmlXPathObject
if xmlXPathObject = xp.xmlXPathEvalExpression(context, path); xmlXPathObject == nil {
return 0
}
defer C.xmlXPathFreeNodeSetList(xmlXPathObject)
if xmlXPathObject._type == C.XPATH_NUMBER {
val = int(xmlXPathObject.floatval)
}
return
}
// Query Do a xpath query with the given context
// returns a slice of nodes
func (xp *Xp) Query(context *C.xmlNode, path string) (nodes []*C.xmlNode) {
var xmlXPathObject *C.xmlXPathObject
if xmlXPathObject = xp.xmlXPathEvalExpression(context, path); xmlXPathObject == nil {
return nil
}
defer C.xmlXPathFreeNodeSetList(xmlXPathObject)
// curtesy of https://github.com/moovweb/gokogiri/blob/master/xpath/xpath.go#L164
if nodesetPtr := xmlXPathObject.nodesetval; nodesetPtr != nil {
if nodesetSize := int(nodesetPtr.nodeNr); nodesetSize > 0 {
nodes = make([]*C.xmlNode, nodesetSize)
for i := 0; i < nodesetSize; i++ {
nodes[i] = C.fetchNode(nodesetPtr, C.int(i))
}
}
}
return
}
// xmlXPathFreeNodeSetList
func (obj *XPathObject) FreeList() {
C.xmlXPathFreeNodeSetList(obj.Ptr)
obj.Ptr = nil
}