Use ptrdiff_t, not int, for overlay counts.

* buffer.h (overlays_at, sort_overlays, GET_OVERLAYS_AT):
* editfns.c (overlays_around, get_pos_property):
* textprop.c (get_char_property_and_overlay):
* xdisp.c (next_overlay_change, note_mouse_highlight):
* xfaces.c (face_at_buffer_position):
* buffer.c (overlays_at, sort_overlays, Foverlays_at)
(Fnext_overlay_change, Fprevious_overlay_change):
Use ptrdiff_t, not int, for sizes.
(overlays_at): Check for size-calculation overflow.

1 files changed, 11 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 41b2fe9aab0..875dcb85168 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,5 +1,16 @@
 2011-06-21  Paul Eggert  <eggert@cs.ucla.edu>
 
+        Use ptrdiff_t, not int, for overlay counts.
+        * buffer.h (overlays_at, sort_overlays, GET_OVERLAYS_AT):
+        * editfns.c (overlays_around, get_pos_property):
+        * textprop.c (get_char_property_and_overlay):
+        * xdisp.c (next_overlay_change, note_mouse_highlight):
+        * xfaces.c (face_at_buffer_position):
+        * buffer.c (overlays_at, sort_overlays, Foverlays_at)
+        (Fnext_overlay_change, Fprevious_overlay_change):
+        Use ptrdiff_t, not int, for sizes.
+        (overlays_at): Check for size-calculation overflow.
+
         * xterm.c (xim_initialize, same_x_server): Strlen may not fit in int.
 
         * xsmfns.c (smc_save_yourself_CB, x_session_initialize): Avoid strlen.