2 // nazghul - an old-school RPG engine
3 // Copyright (C) 2002, 2003 Gordon McNutt
5 // This program is free software; you can redistribute it and/or modify it
6 // under the terms of the GNU General Public License as published by the Free
7 // Software Foundation; either version 2 of the License, or (at your option)
10 // This program is distributed in the hope that it will be useful, but WITHOUT
11 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 // You should have received a copy of the GNU General Public License along with
16 // this program; if not, write to the Free Foundation, Inc., 59 Temple Place,
17 // Suite 330, Boston, MA 02111-1307 USA
20 // gmcnutt@users.sourceforge.net
29 #define heap_entry(ptr,type,field) \
30 ((type*)((char*)(ptr)-(unsigned long)(&((type *)0)->field)))
32 #define heap_empty(h) (!(h)->num_entries)
35 unsigned int max_entries;
36 unsigned int num_entries;
40 extern struct heap *heap_create(unsigned int max_entries);
41 extern void heap_destroy(struct heap *heap);
42 extern void heapify(struct heap *heap, int i);
43 extern int heap_expand(struct heap *heap);
44 extern int heap_insert(struct heap *heap, int *entry);
45 extern int *heap_extract(struct heap *heap);
46 extern void heap_clean(struct heap *heap);