/*
 * dfibHeap.c
 *
 * Copyright (c) 2008-2016 Ruibang Luo <aquaskyline.com>.
 *
 * This file is part of SOAPdenovo.
 *
 * SOAPdenovo is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * SOAPdenovo is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with SOAPdenovo.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#include <stdlib.h>
#include <stdio.h>

#include  "def2.h"
#include "dfib.h"

// Return number of elements stored in heap
IDnum getDFibHeapSize ( DFibHeap *heap )
{
  return dfibheap_getSize ( heap );
}

// Constructor
// Memory allocated
DFibHeap *newDFibHeap ()
{
  return dfh_makekeyheap ();
}

// Add new node into heap with a key, and a pointer to the specified node
DFibHeapNode *insertNodeIntoDHeap ( DFibHeap *heap, Time key, unsigned int node )
{
  DFibHeapNode *res;
  res = dfh_insertkey ( heap, key, node );
  return res;
}

// Replaces the key for a given node
Time replaceKeyInDHeap ( DFibHeap *heap, DFibHeapNode *node, Time newKey )
{
  Time res;
  res = dfh_replacekey ( heap, node, newKey );
  return res;
}


/*************************************************
Function:
    removeNextNodeFromDHeap
Description:
    Removes the edge from DHeap, then returns it.
Input:
    1. heap :       the heap
Output:
    None.
Return:
    The key.
*************************************************/
unsigned int removeNextNodeFromDHeap ( DFibHeap *heap )
{
  unsigned int node;
  node = ( unsigned int ) dfh_extractmin ( heap );
  return node;
}

// Destructor
void destroyDHeap ( DFibHeap *heap )
{
  dfh_deleteheap ( heap );
}

// Replace the node pointed to by a heap node
void replaceValueInDHeap ( DFibHeapNode *node, unsigned int newValue )
{
  dfh_replacedata ( node, newValue );
}

// Remove unwanted node
void destroyNodeInDHeap ( DFibHeapNode *node, DFibHeap *heap )
{
  dfh_delete ( heap, node );
}

Time getKey ( DFibHeapNode *node )
{
  return dfibheap_el_getKey ( node );
}