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tess_heap.h
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1999-11-30
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/* $Id: tess_heap.h,v 1.7.2.3 1999/11/29 18:16:12 gareth Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.1
*
* Copyright (C) 1999 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/*****************************************************************************
*
* GLU 1.3 Polygon Tessellation - Implementation of priority queue
*
* Gareth Hughes <garethh@bell-labs.com>, April 1999
*
*****************************************************************************/
#ifndef __GLU_TESS_HEAP_H__
#define __GLU_TESS_HEAP_H__
#include "tess_typedefs.h"
#ifdef __cplusplus
extern "C" {
#endif
#define HEAP_ALLOC 8
#define HEAP_VERTEX( v ) ((tess_vertex_t *) (v)->ptr)
typedef struct heap_elt_s
{
GLint index;
GLdouble value;
void *ptr;
struct heap_elt_s *next, *prev;
} heap_elt_t;
typedef struct heap_s
{
GLint length;
GLint size;
GLint flags;
heap_elt_t **elements;
} heap_t;
heap_t *heap_init();
void heap_build( heap_t *heap );
GLboolean heap_insert( heap_t *heap, heap_elt_t *element );
heap_elt_t *heap_extract_max( heap_t *heap );
heap_elt_t *heap_delete( heap_t *heap, GLint n );
heap_elt_t *heap_delete_ptr( heap_t *heap, void *ptr );
void heap_cleanup( heap_t **heap );
#ifdef __cplusplus
}
#endif
#endif /* __GLU_TESS_HEAP_H__ */