drop in replacement for old BEAT code, not yet interactive

arm9/source/filesys/vff.c

@@ -7,7 +7,7 @@
 #else
 #define _MAX_FN_LEN (8+3)
 #endif
-    
+
 #define _VFIL_ENABLED    (!_FS_TINY)
 #define _VDIR_ENABLED    ((sizeof(DIR) - sizeof(FFOBJID) >= sizeof(VirtualDir)) && (FF_USE_LFN != 0))
 
@@ -377,3 +377,7 @@ FRESULT fvx_findnopath (TCHAR* path, const TCHAR* pattern) {
     
     return FR_OK;
 }
+
+bool fvx_opened(const FIL* fp) {
+    return (fp->obj.fs != NULL);
+}

arm9/source/filesys/vff.h

@@ -46,3 +46,6 @@ FRESULT fvx_match_name(const TCHAR* path, const TCHAR* pattern);
 FRESULT fvx_preaddir (DIR* dp, FILINFO* fno, const TCHAR* pattern);
 FRESULT fvx_findpath (TCHAR* path, const TCHAR* pattern, BYTE mode);
 FRESULT fvx_findnopath (TCHAR* path, const TCHAR* pattern);
+
+// additional state function
+bool fvx_opened(const FIL* fp);