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diff --git a/libtess/priorityq.h b/libtess/priorityq.h
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-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-** 
-** http://oss.sgi.com/projects/FreeB
-** 
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-** 
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-** 
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
-** Author: Eric Veach, July 1994.
-**
-** $Date$ $Revision$
-** $Header$
-*/
-
-#ifndef __priorityq_sort_h_
-#define __priorityq_sort_h_
-
-#include "priorityq-heap.h"
-
-#undef PQkey
-#undef PQhandle
-#undef PriorityQ
-#undef pqNewPriorityQ
-#undef pqDeletePriorityQ
-#undef pqInit
-#undef pqInsert
-#undef pqMinimum
-#undef pqExtractMin
-#undef pqDelete
-#undef pqIsEmpty
-
-/* Use #define's so that another heap implementation can use this one */
-
-#define PQkey			PQSortKey
-#define PQhandle		PQSortHandle
-#define PriorityQ		PriorityQSort
-
-#define pqNewPriorityQ(leq)	__gl_pqSortNewPriorityQ(leq)
-#define pqDeletePriorityQ(pq)	__gl_pqSortDeletePriorityQ(pq)
-
-/* The basic operations are insertion of a new key (pqInsert),
- * and examination/extraction of a key whose value is minimum
- * (pqMinimum/pqExtractMin).  Deletion is also allowed (pqDelete);
- * for this purpose pqInsert returns a "handle" which is supplied
- * as the argument.
- *
- * An initial heap may be created efficiently by calling pqInsert
- * repeatedly, then calling pqInit.  In any case pqInit must be called
- * before any operations other than pqInsert are used.
- *
- * If the heap is empty, pqMinimum/pqExtractMin will return a NULL key.
- * This may also be tested with pqIsEmpty.
- */
-#define pqInit(pq)		__gl_pqSortInit(pq)
-#define pqInsert(pq,key)	__gl_pqSortInsert(pq,key)
-#define pqMinimum(pq)		__gl_pqSortMinimum(pq)
-#define pqExtractMin(pq)	__gl_pqSortExtractMin(pq)
-#define pqDelete(pq,handle)	__gl_pqSortDelete(pq,handle)
-#define pqIsEmpty(pq)		__gl_pqSortIsEmpty(pq)
-
-
-/* Since we support deletion the data structure is a little more
- * complicated than an ordinary heap.  "nodes" is the heap itself;
- * active nodes are stored in the range 1..pq->size.  When the
- * heap exceeds its allocated size (pq->max), its size doubles.
- * The children of node i are nodes 2i and 2i+1.
- *
- * Each node stores an index into an array "handles".  Each handle
- * stores a key, plus a pointer back to the node which currently
- * represents that key (ie. nodes[handles[i].node].handle == i).
- */
-
-typedef PQHeapKey PQkey;
-typedef PQHeapHandle PQhandle;
-typedef struct PriorityQ PriorityQ;
-
-struct PriorityQ {
-  PriorityQHeap	*heap;
-  PQkey		*keys;
-  PQkey		**order;
-  PQhandle	size, max;
-  int		initialized;
-  int		(*leq)(PQkey key1, PQkey key2);
-};
-  
-PriorityQ	*pqNewPriorityQ( int (*leq)(PQkey key1, PQkey key2) );
-void		pqDeletePriorityQ( PriorityQ *pq );
-
-int		pqInit( PriorityQ *pq );
-PQhandle	pqInsert( PriorityQ *pq, PQkey key );
-PQkey		pqExtractMin( PriorityQ *pq );
-void		pqDelete( PriorityQ *pq, PQhandle handle );
-
-PQkey		pqMinimum( PriorityQ *pq );
-int		pqIsEmpty( PriorityQ *pq );
-
-#endif