Function xmlDOMWrapNsMapAddItem

ThirdParty/libxml2/vtklibxml2/tree.c:7880–7948

* xmlDOMWrapNsMapAddItem: * @map: the ns-map * @oldNs: the old ns-struct * @newNs: the new ns-struct * @depth: depth and ns-kind information * * Adds an ns-mapping item. */

* Adds an ns-mapping item.
*/
static xmlNsMapItemPtr
xmlDOMWrapNsMapAddItem(xmlNsMapPtr *nsmap, int position,
		       xmlNsPtr oldNs, xmlNsPtr newNs, int depth)
{
    xmlNsMapItemPtr ret;
    xmlNsMapPtr map;

    if (nsmap == NULL)
	return(NULL);
    if ((position != -1) && (position != 0))
	return(NULL);
    map = *nsmap;

    if (map == NULL) {
	/*
	* Create the ns-map.
	*/
	map = (xmlNsMapPtr) xmlMalloc(sizeof(struct xmlNsMap));
	if (map == NULL)
	    return(NULL);
	memset(map, 0, sizeof(struct xmlNsMap));
	*nsmap = map;
    }

    if (map->pool != NULL) {
	/*
	* Reuse an item from the pool.
	*/
	ret = map->pool;
	map->pool = ret->next;
	memset(ret, 0, sizeof(struct xmlNsMapItem));
    } else {
	/*
	* Create a new item.
	*/
	ret = (xmlNsMapItemPtr) xmlMalloc(sizeof(struct xmlNsMapItem));
	if (ret == NULL)
	    return(NULL);
	memset(ret, 0, sizeof(struct xmlNsMapItem));
    }

    if (map->first == NULL) {
	/*
	* First ever.
	*/
	map->first = ret;
	map->last = ret;
    } else if (position == -1) {
	/*
	* Append.
	*/
	ret->prev = map->last;
	map->last->next = ret;
	map->last = ret;
    } else if (position == 0) {
	/*
	* Set on first position.
	*/