src/glu/sgi/libnurbs/internals/maplist.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  * maplist.c++
  37  *
  38  */
  39
  40 #include "glimports.h"
  41 #include "mystdio.h"
  42 #include "myassert.h"
  43 #include "mymath.h"
  44 #include "nurbsconsts.h"
  45 #include "maplist.h"
  46 #include "mapdesc.h"
  47
  48 Maplist::Maplist( Backend& b )
  49     : mapdescPool( sizeof( Mapdesc ), 10, "mapdesc pool" ),
  50       backend( b )
  51 {
  52     maps = 0; lastmap = &maps;
  53 }
  54
  55 void
  56 Maplist::initialize( void )
  57 {
  58     freeMaps();
  59     define( N_P2D, 0, 2 );
  60     define( N_P2DR, 1, 3 );
  61 }
  62
  63 void
  64 Maplist::add( long type, int israt, int ncoords )
  65 {
  66     *lastmap = new(mapdescPool) Mapdesc( type, israt, ncoords, backend );
  67     lastmap = &((*lastmap)->next);
  68 }
  69
  70 void
  71 Maplist::define( long type, int israt, int ncoords )
  72 {
  73 #ifndef NDEBUG // to avoid warning
  74     Mapdesc *m = locate( type );
  75     assert( m == NULL || ( m->isrational == israt && m->ncoords == ncoords ) );
  76 #endif
  77     add( type, israt, ncoords );
  78 }
  79
  80 void
  81 Maplist::remove( Mapdesc *m )
  82 {
  83     for( Mapdesc **curmap = &maps; *curmap; curmap = &((*curmap)->next) ) {
  84         if( *curmap == m ) {
  85             *curmap = m->next;
  86             m->deleteMe( mapdescPool );
  87             return;
  88         }
  89     }
  90     abort();
  91 }
  92
  93 void
  94 Maplist::freeMaps( void )
  95 {
  96     mapdescPool.clear();
  97     maps = 0;
  98     lastmap = &maps;
  99 }
 100
 101 Mapdesc *
 102 Maplist::find( long type )
 103 {
 104     Mapdesc *val = locate( type );
 105     assert( val != 0 );
 106     return val;
 107 }
 108
 109 Mapdesc *
 110 Maplist::locate( long type )
 111 {
 112     Mapdesc *m;
 113     for( m = maps; m; m = m->next )
 114         if( m->getType() == type ) break;
 115     return m;
 116 }