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/* RCSid $Id$ */
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/*
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** Author: Christian Reetz ([email protected])
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*/
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#ifndef __MAXHEAP_H
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#define __MAXHEAP_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "g3vector.h"
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#define HP_STARTCAP 5000001
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#define HP_INVALID 0
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#define HP_BUILD 1
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#define HP_SORTED 2
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typedef struct heapElem {
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g3Float key;
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void* entity;
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} heapElem;
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typedef struct maxHeap {
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int size;
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int cap;
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int state;
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heapElem* heap;
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} maxHeap;
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#define mheap_get_max(hp) (hp->heap[0])
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#define mh_left(i) (2*i + 1)
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#define mh_right(i) (2*i + 2)
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#define mh_parent(i) (((int) ((i + 1)/2)) - 1)
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int mheap_init(maxHeap* hp);
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void mheap_free(maxHeap* hp);
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maxHeap* mheap_create();
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void mheap_build(maxHeap* hp);
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void mheap_sort(maxHeap* hp);
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heapElem mheap_remove_max(maxHeap* hp);
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int mheap_insert(maxHeap* hp,g3Float key,void* entity);
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#ifdef __cplusplus
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}
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#endif
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#endif
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