pqueue.h

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/*
 * Copyright (c) 2014, Volkan Yazıcı <volkan.yazici@gmail.com>
 * 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 COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
 */
 
 
#ifndef PQUEUE_H
#define PQUEUE_H
 
typedef unsigned long long pqueue_pri_t;
 
typedef pqueue_pri_t (*pqueue_get_pri_f)(void *a);
typedef void (*pqueue_set_pri_f)(void *a, pqueue_pri_t pri);
typedef int (*pqueue_cmp_pri_f)(pqueue_pri_t next, pqueue_pri_t curr);
 
typedef size_t (*pqueue_get_pos_f)(void *a);
typedef void (*pqueue_set_pos_f)(void *a, size_t pos);
 
typedef void (*pqueue_print_entry_f)(FILE *out, void *a);
 
typedef struct pqueue_t
{
    size_t size;                
    size_t avail;               
    size_t step;                
    pqueue_cmp_pri_f cmppri;    
    pqueue_get_pri_f getpri;    
    pqueue_set_pri_f setpri;    
    pqueue_get_pos_f getpos;    
    pqueue_set_pos_f setpos;    
    void **d;                   
} pqueue_t;
 
pqueue_t *pqueue_init(size_t n, pqueue_cmp_pri_f cmppri, pqueue_get_pri_f getpri,
        pqueue_set_pri_f setpri, pqueue_get_pos_f getpos, pqueue_set_pos_f setpos);
 
void pqueue_free(pqueue_t *q);
 
size_t pqueue_size(pqueue_t *q);
 
int pqueue_insert(pqueue_t *q, void *d);
 
void
pqueue_change_priority(pqueue_t *q, pqueue_pri_t new_pri, void *d);
 
void *pqueue_pop(pqueue_t *q);
 
int pqueue_remove(pqueue_t *q, void *d);
 
void *pqueue_peek(pqueue_t *q);
 
void pqueue_print(pqueue_t *q, FILE *out, pqueue_print_entry_f print);
 
void pqueue_dump(pqueue_t *q, FILE *out, pqueue_print_entry_f print);
 
int pqueue_is_valid(pqueue_t *q);
 
#endif /* PQUEUE_H */