mirror of
https://github.com/reactos/reactos.git
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141 lines
3.3 KiB
C++
141 lines
3.3 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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/*
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* sorter.c++
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*
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* $Date$ $Revision: 1.1 $
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* $Header: /cygdrive/c/RCVS/CVS/ReactOS/reactos/lib/glu32/libnurbs/internals/sorter.cc,v 1.1 2004/02/02 16:39:12 navaraf Exp $
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*/
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#include "glimports.h"
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#include "sorter.h"
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#include "mystdio.h"
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Sorter::Sorter( int _es )
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{
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es = _es;
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}
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void
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Sorter::qsort( void *a, int n )
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{
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qs1( (char *)a, ((char *)a)+n*es);
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}
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int
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Sorter::qscmp( char *, char * )
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{
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dprintf( "Sorter::qscmp: pure virtual called\n" );
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return 0;
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}
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void
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Sorter::qsexc( char *, char * )
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{
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dprintf( "Sorter::qsexc: pure virtual called\n" );
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}
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void
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Sorter::qstexc( char *, char *, char * )
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{
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dprintf( "Sorter::qstexc: pure virtual called\n" );
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}
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void
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Sorter::qs1( char *a, char *l )
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{
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char *i, *j;
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char *lp, *hp;
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int c;
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unsigned int n;
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start:
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if((n=l-a) <= (unsigned int)es)
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return;
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n = es * (n / (2*es));
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hp = lp = a+n;
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i = a;
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j = l-es;
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while(1) {
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if(i < lp) {
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if((c = qscmp(i, lp)) == 0) {
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qsexc(i, lp -= es);
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continue;
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}
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if(c < 0) {
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i += es;
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continue;
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}
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}
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loop:
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if(j > hp) {
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if((c = qscmp(hp, j)) == 0) {
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qsexc(hp += es, j);
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goto loop;
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}
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if(c > 0) {
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if(i == lp) {
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qstexc(i, hp += es, j);
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i = lp += es;
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goto loop;
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}
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qsexc(i, j);
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j -= es;
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i += es;
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continue;
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}
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j -= es;
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goto loop;
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}
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if(i == lp) {
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if(lp-a >= l-hp) {
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qs1(hp+es, l);
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l = lp;
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} else {
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qs1(a, lp);
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a = hp+es;
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}
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goto start;
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}
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qstexc(j, lp -= es, i);
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j = hp -= es;
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}
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}
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