API|libcommon: DD_GetVariable() now provides access to the DED database

libcommon provides a Defs() helper function, returning a reference to
the engine's DED database (ded_t).

doomsday/api/dd_share.h

@@ -258,7 +258,8 @@ enum {
     DD_TM_CEILING_Z,            ///< output from P_CheckPosition
     DD_SHIFT_DOWN,
     DD_GAME_RECOMMENDS_SAVING,  ///< engine asks whether game should be saved (e.g., when upgrading) (game's GetInteger)
-    DD_NOTIFY_GAME_SAVED        ///< savegame was written
+    DD_NOTIFY_GAME_SAVED,       ///< savegame was written
+    DD_DEFS                     ///< engine definition database (DED)
 };
 
 //------------------------------------------------------------------------

doomsday/client/src/dd_main.cpp

@@ -2596,6 +2596,9 @@ void *DD_GetVariable(int ddvalue)
         fracTic = gameTime * TICSPERSEC;
         return &fracTic; }
 
+    case DD_DEFS:
+        return &defs;
+
     default: break;
     }
 

doomsday/plugins/common/include/g_defs.h

@@ -22,23 +22,16 @@
 #define LIBCOMMON_DEFINITION_UTILS_H
 
 #ifdef __cplusplus
+#include <doomsday/defs/ded.h>
 #include <doomsday/uri.h>
 
-extern "C" {
-#endif
+typedef void EpisodeInfo;
+typedef void MapInfo;
 
 /**
- * @return  The default for a value (retrieved from Doomsday).
+ * Provides access to the engine's definition database (DED).
  */
-int GetDefInt(char const *def, int *returnVal);
-
-void GetDefState(char const *def, int *returnVal);
-
-#ifdef __cplusplus
-} // extern "C"
-
-typedef void EpisodeInfo;
-typedef void MapInfo;
+ded_t &Defs();
 
 /**
  * @param id  Identifier of the episode to lookup info for.
@@ -74,5 +67,18 @@ MapInfo *P_CurrentMapInfo();
  */
 de::Uri P_TranslateMap(uint map);
 
-#endif // __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @return  The default for a value (retrieved from Doomsday).
+ */
+int GetDefInt(char const *def, int *returnVal);
+
+void GetDefState(char const *def, int *returnVal);
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
 #endif // LIBCOMMON_DEFINITION_UTILS_H

doomsday/plugins/common/src/g_defs.cpp

@@ -19,10 +19,16 @@
  */
 
 #include "common.h"
+#include "g_common.h"
 #include "g_defs.h"
 
 using namespace de;
 
+ded_t &Defs()
+{
+    return *static_cast<ded_t *>(DD_GetVariable(DD_DEFS));
+}
+
 int GetDefInt(char const *def, int *returnVal)
 {
     // Get the value.