diff options
Diffstat (limited to 'src/glu/sgi/libnurbs/internals/sorter.cc')
| -rw-r--r-- | src/glu/sgi/libnurbs/internals/sorter.cc | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/src/glu/sgi/libnurbs/internals/sorter.cc b/src/glu/sgi/libnurbs/internals/sorter.cc new file mode 100644 index 00000000000..b10a8a89103 --- /dev/null +++ b/src/glu/sgi/libnurbs/internals/sorter.cc @@ -0,0 +1,141 @@ +/* +** 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. +*/ + +/* + * sorter.c++ + * + * $Date: 2006/03/14 15:08:52 $ $Revision: 1.3 $ + * $Header: /cvs/mesa/Mesa/src/glu/sgi/libnurbs/internals/sorter.cc,v 1.3 2006/03/14 15:08:52 brianp Exp $ + */ + +#include "glimports.h" +#include "sorter.h" +#include "mystdio.h" + +Sorter::Sorter( int _es ) +{ + es = _es; +} + +void +Sorter::qsort( void *a, int n ) +{ + qs1( (char *)a, ((char *)a)+n*es); +} + +int +Sorter::qscmp( char *, char * ) +{ + _glu_dprintf( "Sorter::qscmp: pure virtual called\n" ); + return 0; +} + + +void +Sorter::qsexc( char *, char * ) +{ + _glu_dprintf( "Sorter::qsexc: pure virtual called\n" ); +} + + +void +Sorter::qstexc( char *, char *, char * ) +{ + _glu_dprintf( "Sorter::qstexc: pure virtual called\n" ); +} + +void +Sorter::qs1( char *a, char *l ) +{ + char *i, *j; + char *lp, *hp; + int c; + unsigned int n; + +start: + if((n=l-a) <= (unsigned int)es) + return; + n = es * (n / (2*es)); + hp = lp = a+n; + i = a; + j = l-es; + while(1) { + if(i < lp) { + if((c = qscmp(i, lp)) == 0) { + qsexc(i, lp -= es); + continue; + } + if(c < 0) { + i += es; + continue; + } + } + +loop: + if(j > hp) { + if((c = qscmp(hp, j)) == 0) { + qsexc(hp += es, j); + goto loop; + } + if(c > 0) { + if(i == lp) { + qstexc(i, hp += es, j); + i = lp += es; + goto loop; + } + qsexc(i, j); + j -= es; + i += es; + continue; + } + j -= es; + goto loop; + } + + if(i == lp) { + if(lp-a >= l-hp) { + qs1(hp+es, l); + l = lp; + } else { + qs1(a, lp); + a = hp+es; + } + goto start; + } + + qstexc(j, lp -= es, i); + j = hp -= es; + } +} + |