src/glu/sgi/libutil/registry.c

   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 #include "gluos.h"
  37 #include <GL/glu.h>
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41
  42 static const GLubyte versionString[] = "1.3";
  43 static const GLubyte extensionString[] =
  44     "GLU_EXT_nurbs_tessellator "
  45     "GLU_EXT_object_space_tess "
  46     ;
  47
  48 const GLubyte * GLAPIENTRY
  49 gluGetString(GLenum name)
  50 {
  51
  52     if (name == GLU_VERSION) {
  53         return versionString;
  54     } else if (name == GLU_EXTENSIONS) {
  55         return extensionString;
  56     }
  57     return NULL;
  58 }
  59
  60 /* extName is an extension name.
  61  * extString is a string of extensions separated by blank(s). There may or
  62  * may not be leading or trailing blank(s) in extString.
  63  * This works in cases of extensions being prefixes of another like
  64  * GL_EXT_texture and GL_EXT_texture3D.
  65  * Returns GL_TRUE if extName is found otherwise it returns GL_FALSE.
  66  */
  67 GLboolean GLAPIENTRY
  68 gluCheckExtension(const GLubyte *extName, const GLubyte *extString)
  69 {
  70   GLboolean flag = GL_FALSE;
  71   char *word;
  72   char *lookHere;
  73   char *deleteThis;
  74
  75   if (extString == NULL) return GL_FALSE;
  76
  77   deleteThis = lookHere = (char *)malloc(strlen((const char *)extString)+1);
  78   if (lookHere == NULL)
  79      return GL_FALSE;
  80   /* strtok() will modify string, so copy it somewhere */
  81   strcpy(lookHere,(const char *)extString);
  82
  83   while ((word= strtok(lookHere," ")) != NULL) {
  84      if (strcmp(word,(const char *)extName) == 0) {
  85         flag = GL_TRUE;
  86         break;
  87      }
  88      lookHere = NULL;           /* get next token */
  89   }
  90   free((void *)deleteThis);
  91   return flag;
  92 } /* gluCheckExtension() */
  93
  94
  95
  96 /*** registry.c ***/