IXML_Node* xmldb_getMetaVariable(IXML_Element* obj, const char* name)
{
IXML_Element* metaInfo = xmldb_getMetaInfo(obj);
if (metaInfo == NULL)
{
return NULL;
}
// iterate through all meta tags until we find corresponding name
IXML_Node* metaNode = ixmlNode_getFirstChild(ixmlElement_getNode(metaInfo));
for (; metaNode != NULL; metaNode = ixmlNode_getNextSibling(metaNode))
{
IXML_Element* metaElement = ixmlNode_convertToElement(metaNode);
if (metaElement == NULL)
{
// this piece of meta data is not an element - ignore it
continue;
}
if (strcmp(ixmlElement_getTagName(metaElement), name) == 0)
{
return ixmlAttr_getNode(
ixmlElement_getAttributeNode(metaElement, OBIX_ATTR_VAL));
}
}
// no meta tag with such name found
return NULL;
}
int xmldb_changeMetaVariable(IXML_Node* meta, const char* newValue)
{
int error = ixmlNode_setNodeValue(meta, newValue);
if (error != IXML_SUCCESS)
{
const char* metaName =
ixmlElement_getTagName(ixmlAttr_getOwnerElement(
ixmlNode_convertToAttr(meta)));
log_error("Unable to change value of meta attribute \"%s\" to \"%s\":"
"ixmlNode_setNodeValue returned %d.",
metaName, newValue, error);
return -1;
}
return 0;
}
const DOMString rtpxmlElement_getTagName(RTPXML_Element* element)
{
return ixmlElement_getTagName((IXML_Element *)element);
}
int L_getTagName(lua_State *L)
{
lua_pushstring(L, ixmlElement_getTagName(checkelement(L, 1)));
return 1;
}
/**
* Helper function for #getNodeByHref(IXML_Document*,const char*).
*
* @param checked specifies number of symbols from href which are already
* checked (and match) in parent node.
*/
static IXML_Node* getNodeByHrefRecursive(IXML_Node* node, const char* href,
int checked, int* slashFlag)
{
if (node == NULL)
{
//recursion exit point
return NULL;
}
IXML_Node* match = NULL;
IXML_Element* element = ixmlNode_convertToElement(node);
int compareResult = 0;
// ignore all nodes which are not tags, are reference tags
// or do not have 'href' attribute
if (element != NULL)
{
const char* currentUri =
ixmlElement_getAttribute(element, OBIX_ATTR_HREF);
if ((strcmp(ixmlElement_getTagName(element), OBIX_OBJ_REF) != 0)
&& (currentUri != NULL))
{
compareResult = compare_uri(currentUri, href, checked, slashFlag);
if (compareResult == 0)
{
// we found the required node
return node;
}
}
}
// check children
// note that compareResult == 0 means that URI's
// were not compared at all
if (compareResult == 0)
{
match = getNodeByHrefRecursive(ixmlNode_getFirstChild(node),
href,
checked,
slashFlag);
}
else if (compareResult > 0)
{
// we found part of the uri on this step
// continue search in children the remaining address
match = getNodeByHrefRecursive(ixmlNode_getFirstChild(node),
href,
compareResult,
slashFlag);
}
// do not check children if compareResult < 0
if (match == NULL)
{
match = getNodeByHrefRecursive(ixmlNode_getNextSibling(node),
href,
checked,
slashFlag);
}
return match;
}