[xml] Do I need to free existing content before overwriting with a new string?

[Angus Comber <iteloffice gmail com>]

Hello

I need to update the value of a particular key.  Using the libxml tutorial Appendix E as a starting point I changed parsestory as below to update the contents of the node with key=keyword.

Will this code leak memory?  Do I need to free the existing contents before overwriting? Here is code:

void parseStory (xmlDocPtr doc, xmlNodePtr cur, char *keyword) {

cur = cur->xmlChildrenNode;

while (cur != NULL) {

if ((!xmlStrcmp(cur->name, (const xmlChar *)"keyword"))){

            cur = cur->children;

            cur->content = xmlStrndup((const xmlChar *)"mynewvalue", strlen("mynewvalue"));

}

 

cur = cur->next;

}

    return;

}

Angus