2 ** License Applicability. Except to the extent portions of this file are
3 ** made subject to an alternative license as permitted in the SGI Free
4 ** Software License B, Version 1.1 (the "License"), the contents of this
5 ** file are subject only to the provisions of the License. You may not use
6 ** this file except in compliance with the License. You may obtain a copy
7 ** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
8 ** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
10 ** http://oss.sgi.com/projects/FreeB
12 ** Note that, as provided in the License, the Software is distributed on an
13 ** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
14 ** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
15 ** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
16 ** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
18 ** Original Code. The Original Code is: OpenGL Sample Implementation,
19 ** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
20 ** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
21 ** Copyright in any portions created by third parties is as indicated
22 ** elsewhere herein. All Rights Reserved.
24 ** Additional Notice Provisions: The application programming interfaces
25 ** established by SGI in conjunction with the Original Code are The
26 ** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
27 ** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
28 ** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
29 ** Window System(R) (Version 1.3), released October 19, 1998. This software
30 ** was created using the OpenGL(R) version 1.2.1 Sample Implementation
31 ** published by SGI, but has not been independently verified as being
32 ** compliant with the OpenGL(R) version 1.2.1 Specification.
34 ** $Date: 2001/03/17 00:25:41 $ $Revision: 1.1 $
37 ** $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libnurbs/nurbtess/quicksort.cc,v 1.1 2001/03/17 00:25:41 brianp Exp $
43 static void swap(void *v
[], int i
, int j
);
45 /*as an example to use this function to
46 *sort integers, you need to supply the function
47 *int comp(int *i1, int *i2)
49 * if( *i1 < * i2) return -1;
52 *and an array of pointers to integers:
53 * int *v[100] (allocate space for where each v[i] points to).
55 * quicksort( (void**)v, left, right, (int (*)(void *, void *))comp)
57 void quicksort(void *v
[], int left
, int right
,
58 int (*comp
) (void *, void *))
61 void swap(void *v
[], int , int);
62 if(left
>= right
) /*do nothing if array contains */
63 return; /*fewer than two elements*/
65 swap(v
, left
, (left
+right
)/2);
67 for(i
=left
+1; i
<=right
; i
++)
68 if((*comp
)(v
[i
], v
[left
])<0)
71 quicksort(v
, left
, last
-1, comp
);
72 quicksort(v
, last
+1, right
, comp
);
75 void swap(void *v
[], int i
, int j
)