mirror of
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c501d8112c
svn path=/branches/aicom-network-fixes/; revision=34994
79 lines
2.9 KiB
C++
79 lines
2.9 KiB
C++
/*
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** License Applicability. Except to the extent portions of this file are
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** made subject to an alternative license as permitted in the SGI Free
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** Software License B, Version 1.1 (the "License"), the contents of this
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** file are subject only to the provisions of the License. You may not use
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** this file except in compliance with the License. You may obtain a copy
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** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
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** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
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**
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** http://oss.sgi.com/projects/FreeB
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**
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** Note that, as provided in the License, the Software is distributed on an
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** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
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** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
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** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
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** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
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**
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** Original Code. The Original Code is: OpenGL Sample Implementation,
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** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
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** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
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** Copyright in any portions created by third parties is as indicated
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** elsewhere herein. All Rights Reserved.
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**
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** Additional Notice Provisions: The application programming interfaces
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** established by SGI in conjunction with the Original Code are The
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** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
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** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
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** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
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** Window System(R) (Version 1.3), released October 19, 1998. This software
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** was created using the OpenGL(R) version 1.2.1 Sample Implementation
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** published by SGI, but has not been independently verified as being
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** compliant with the OpenGL(R) version 1.2.1 Specification.
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**
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** $Date$ $Revision: 1.1 $
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*/
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/*
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** $Header: /cygdrive/c/RCVS/CVS/ReactOS/reactos/lib/glu32/libnurbs/nurbtess/quicksort.cc,v 1.1 2004/02/02 16:39:13 navaraf Exp $
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*/
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#include <stdlib.h>
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#include <stdio.h>
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static void swap(void *v[], int i, int j)
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{
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void *temp;
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temp = v[i];
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v[i] = v[j];
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v[j] = temp;
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}
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/*as an example to use this function to
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*sort integers, you need to supply the function
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*int comp(int *i1, int *i2)
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*{
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* if( *i1 < * i2) return -1;
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* else return 1;
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*}
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*and an array of pointers to integers:
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* int *v[100] (allocate space for where each v[i] points to).
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*then you can call:
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* quicksort( (void**)v, left, right, (int (*)(void *, void *))comp)
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*/
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void quicksort(void *v[], int left, int right,
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int (*comp) (void *, void *))
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{
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int i, last;
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if(left >= right) /*do nothing if array contains */
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return; /*fewer than two elements*/
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swap(v, left, (left+right)/2);
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last = left;
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for(i=left+1; i<=right; i++)
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if((*comp)(v[i], v[left])<0)
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swap(v, ++last, i);
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swap(v, left, last);
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quicksort(v, left, last-1, comp);
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quicksort(v, last+1, right, comp);
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}
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