#ifndef SORTLIST_H
#define SORTLIST_H

//.float(entity,entity) sort_cmp;
.entity sort_next, sort_prev;

entity Sort_Spawn();

/**
 * Swap two neighbours in a sortlist.
 * @param a FIRST entity
 * @param b entity after a
 */
#define SORT_SWAP(a,b)									\
	b.sort_prev = a.sort_prev;							\
	a.sort_next = b.sort_next;							\
	if(b.sort_next) b.sort_next.sort_prev = a;			\
	if(a.sort_prev) a.sort_prev.sort_next = b;			\
	a.sort_prev = b;									\
	b.sort_next = a

#endif