HL_NodeList

This type is a list of nodes and is structured like this:

typedef struct {
   char filename[256];  /* a file string */
   char tmp_name[512];  /* temporary names for internal use */
   int nNodes;          /* the number of nodes in the list */
   int nAllocNodes;     /* the number of allocated nodes in the list; internal */
   HL_Node** nodes;     /* the nodes themselves */
} HL_NodeList;