[Feature] onplay.c show file progress

first some clean-up of onplay.c

extend/move fileobject copy, move, delete routines in prep for other users

add error checking, better error codes
pre scan to make sure the operation doesn't exceed system resources
show progress for file and directory copies

Change-Id: Ife2e62df554892dab651bab40433bf70b27e73ff

1 files changed, 18 insertions, 0 deletions

diff --git a/apps/misc.c b/apps/misc.c
index dd73c98a69..d8caabd397 100644
--- a/apps/misc.c
+++ b/apps/misc.c
@@ -1999,4 +1999,22 @@ long from_normalized_volume(long norm, long min_vol, long max_vol, long max_norm
 
     return vol >> NVOL_FRACBITS;
 }
+
+void clear_screen_buffer(bool update)
+{
+    struct viewport vp;
+    struct viewport *last_vp;
+    FOR_NB_SCREENS(i)
+    {
+        struct screen * screen = &screens[i];
+        viewport_set_defaults(&vp, screen->screen_type);
+        last_vp = screen->set_viewport(&vp);
+        screen->clear_viewport();
+        if (update) {
+            screen->update_viewport();
+        }
+        screen->set_viewport(last_vp);
+    }
+}
+
 #endif /* ndef __PCTOOL__ */