1 files changed, 63 insertions, 0 deletions
diff --git a/src/glut/dos/extens.c b/src/glut/dos/extens.c
new file mode 100644
index 00000000000..ae8e44f4088
--- /dev/null
+++ b/src/glut/dos/extens.c
@@ -0,0 +1,63 @@
+/*
+ * 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 : [email protected]
+ *  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;
+        }
+     }
+ }
+}