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/*-
* Copyright 1997, 1998-2003 John-Mark Gurney.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: fib.h,v 1.10 2003/01/14 10:11:30 jmg Exp $
*
*/
#ifndef _FIB_H_
#define _FIB_H_
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
struct fibheap_el;
typedef int (*voidcmp)(void *, void *);
struct fibheap {
int (*fh_cmp_fnct)(void *, void *);
int fh_n;
int fh_Dl;
struct fibheap_el **fh_cons;
struct fibheap_el *fh_min;
struct fibheap_el *fh_root;
void *fh_neginf;
int fh_keys : 1;
#ifdef FH_STATS
int fh_maxn;
int fh_ninserts;
int fh_nextracts;
#endif
};
struct fibheap_el {
int fhe_degree;
int fhe_mark;
struct fibheap_el *fhe_p;
struct fibheap_el *fhe_child;
struct fibheap_el *fhe_left;
struct fibheap_el *fhe_right;
int fhe_key;
void *fhe_data;
};
/* functions for key heaps */
struct fibheap *fh_makekeyheap(void);
void fh_initheap(struct fibheap *);
struct fibheap_el *fh_insertkey(struct fibheap *, int, void *);
int fh_minkey(struct fibheap *);
int fh_replacekey(struct fibheap *, struct fibheap_el *, int);
void *fh_replacekeydata(struct fibheap *, struct fibheap_el *, int, void *);
/* functions for void * heaps */
struct fibheap *fh_makeheap(void);
voidcmp fh_setcmp(struct fibheap *, voidcmp);
void *fh_setneginf(struct fibheap *, void *);
struct fibheap_el *fh_insert(struct fibheap *, void *);
/* shared functions */
void *fh_extractmin(struct fibheap *);
void *fh_min(struct fibheap *);
void *fh_replacedata(struct fibheap *, struct fibheap_el *, void *);
void *fh_delete(struct fibheap *, struct fibheap_el *);
void fh_deleteheap(struct fibheap *);
void fh_destroyheap(struct fibheap *h);
/* this assumes both heaps are allocated on the heap */
struct fibheap *fh_union(struct fibheap *, struct fibheap *);
#ifdef FH_STATS
int fh_maxn(struct fibheap *);
int fh_ninserts(struct fibheap *);
int fh_nextracts(struct fibheap *);
#endif
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* _FIB_H_ */
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