Function xmlTreeEnsureXMLDecl

ThirdParty/libxml2/vtklibxml2/tree.c:6019–6032

* xmlTreeEnsureXMLDecl: * @doc: the doc * * Ensures that there is an XML namespace declaration on the doc. * * Returns the XML ns-struct or NULL if a memory allocation failed. */

* Returns the XML ns-struct or NULL if a memory allocation failed.
*/
static xmlNsPtr
xmlTreeEnsureXMLDecl(xmlDocPtr doc)
{
    xmlNsPtr ns;

    ns = doc->oldNs;
    if (ns != NULL)
	return (ns);

    ns = xmlNewXmlNs();
    doc->oldNs = ns;

    return(ns);
}

/**
 * xmlSearchNsSafe: