[tkreuzer] 66232: [MESA] Partly sync find_value() with MESA 10.4.4. Fixes endless loop when GoogleEarth is started. GoogleEarth now loads and displays the earth, but it doesn't handle any input and...

Author: tkreuzer
Date: Wed Feb 11 21:36:01 2015
New Revision: 66232

URL: http://svn.reactos.org/svn/reactos?rev=66232&view=rev
Log:
[MESA]
Partly sync find_value() with MESA 10.4.4. Fixes endless loop when GoogleEarth is started. GoogleEarth now loads and displays the earth, but it doesn't handle any input and makes the entire GUI hang.

Modified:
    trunk/reactos/dll/opengl/mesa/main/get.c

Modified: trunk/reactos/dll/opengl/mesa/main/get.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/dll/opengl/mesa/main/get.c?...
==============================================================================
--- trunk/reactos/dll/opengl/mesa/main/get.c	[iso-8859-1] (original)
+++ trunk/reactos/dll/opengl/mesa/main/get.c	[iso-8859-1] Wed Feb 11 21:36:01 2015
@@ -1132,10 +1132,20 @@
    mask = Elements(table) - 1;
    hash = (pname * prime_factor);
    while (1) {
-      d = &values[table[hash & mask]];
-
+      int idx = table[hash & mask];
+
+      /* If the enum isn't valid, the hash walk ends with index 0,
+       * pointing to the first entry of values[] which doesn't hold
+       * any valid enum. */
+      if (unlikely(idx == 0)) {
+         _mesa_error(ctx, GL_INVALID_ENUM, "%s(pname=%s)", func,
+               _mesa_lookup_enum_by_nr(pname));
+         return &error_value;
+      }
+
+      d = &values[idx];
       if (likely(d->pname == pname))
-	 break;
+         break;

hash += prime_step;
    }