src/glu/sgi/libnurbs/internals/flistsorter.cc

   1 /*
   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:
   9 **
  10 ** http://oss.sgi.com/projects/FreeB
  11 **
  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.
  17 **
  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.
  23 **
  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.
  33 */
  34
  35 /*
  36  * flistsorter.c++
  37  *
  38  */
  39
  40 #include "glimports.h"
  41 #include "flistsorter.h"
  42
  43 FlistSorter::FlistSorter( void ) : Sorter( sizeof( REAL ) )
  44 {
  45 }
  46
  47 void
  48 FlistSorter::qsort( REAL *p, int n )
  49 {
  50     Sorter::qsort( (char *)p, n );
  51 }
  52
  53 int
  54 FlistSorter::qscmp( char *i, char *j )
  55 {
  56     REAL f0 = *(REAL *)i;
  57     REAL f1 = *(REAL *)j;
  58     return (f0 < f1) ? -1 : 1;
  59 }
  60
  61 void
  62 FlistSorter::qsexc( char *i, char *j )
  63 {
  64     REAL *f0 = (REAL *)i;
  65     REAL *f1 = (REAL *)j;
  66     REAL tmp = *f0;
  67     *f0 = *f1;
  68     *f1 = tmp;
  69 }
  70
  71 void
  72 FlistSorter::qstexc( char *i, char *j, char *k )
  73 {
  74     REAL *f0 = (REAL *)i;
  75     REAL *f1 = (REAL *)j;
  76     REAL *f2 = (REAL *)k;
  77     REAL tmp = *f0;
  78     *f0 = *f2;
  79     *f2 = *f1;
  80     *f1 = tmp;
  81 }