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/*
* Mesa 3-D graphics library
* Version: 3.4
* Copyright (C) 1995-1998 Brian Paul
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* DOS/DJGPP glut driver v1.3 for Mesa 5.0
*
* Copyright (C) 2002 - Borca Daniel
* Email : dborca@yahoo.com
* Web : http://www.geocities.com/dborca
*/
#include <string.h>
#include "GL/glut.h"
int APIENTRY glutExtensionSupported (const char *extension)
{
static const GLubyte *extensions = NULL;
const GLubyte *last, *where;
/* Extension names should not have spaces. */
if (strchr(extension, ' ') || *extension == '\0') {
return GL_FALSE;
}
/* Not my problem if you don't have a valid OpenGL context */
if (!extensions) {
extensions = glGetString(GL_EXTENSIONS);
}
/* Take care of sub-strings etc. */
for (last = extensions;;) {
if ((where = (GLubyte *)strstr((const char *)last, extension)) == NULL) {
return GL_FALSE;
}
last = where + strlen(extension);
if (where == extensions || *(where - 1) == ' ') {
if (*last == ' ' || *last == '\0') {
return GL_TRUE;
}
}
}
}
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