diff options
author | Paul Eggert <eggert@cs.ucla.edu> | 2019-01-31 10:29:50 -0800 |
---|---|---|
committer | Paul Eggert <eggert@cs.ucla.edu> | 2019-01-31 10:31:43 -0800 |
commit | 05d2fc7170fb66a87601b1c76ddae2c1b7b4b934 (patch) | |
tree | 217ddd3a45ea611069d85ac13e22e525bb965996 /doc/lispref/buffers.texi | |
parent | a68eee50eb515b28b448894299334afced26ef78 (diff) | |
download | emacs-05d2fc7170fb66a87601b1c76ddae2c1b7b4b934.tar.gz |
Widen modiff counts to avoid wraparound
Widen modification counts to at least 64 bits, to make
wraparound practically impossible.
* doc/lispref/buffers.texi (Buffer Modification):
Don’t say the modification-count can wrap around.
* src/buffer.c (Frestore_buffer_modified_p, Fbuffer_swap_text)
(modify_overlay):
* src/insdel.c (insert_1_both, insert_from_string_1)
(insert_from_gap, insert_from_buffer_1)
(adjust_after_replace, replace_range, replace_range_2)
(del_range_2, modify_text):
* src/textprop.c (modify_text_properties):
Use modiff_incr instead of incrementing directly.
(Fbuffer_modified_tick, Fbuffer_chars_modified_tick):
Don’t assume modification counts fit into fixnums.
* src/buffer.h (struct buffer_text, struct buffer):
* src/cmds.c (internal_self_insert):
* src/fileio.c (Finsert_file_contents):
* src/indent.c (last_known_column_modified):
* src/keyboard.c (command_loop_1):
* src/marker.c (cached_modiff):
* src/syntax.c (find_start_modiff, parse_sexp_propertize)
(find_defun_start):
* src/window.h (struct window):
Use modiff_count for modification counts.
* src/editfns.c (Fsubst_char_in_region):
Copy instead of incrementing modification counts,
since integer overflow checking is not needed here.
* src/lisp.h (modiff_count): New type.
(modiff_incr, modiff_to_integer): New inline functions.
* src/pdumper.c (dump_buffer): Update hash.
Diffstat (limited to 'doc/lispref/buffers.texi')
-rw-r--r-- | doc/lispref/buffers.texi | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/doc/lispref/buffers.texi b/doc/lispref/buffers.texi index e6e03ac27ae..2dbe9c27f2d 100644 --- a/doc/lispref/buffers.texi +++ b/doc/lispref/buffers.texi @@ -573,7 +573,6 @@ echo area; use @code{set-buffer-modified-p} (above) instead. This function returns @var{buffer}'s modification-count. This is a counter that increments every time the buffer is modified. If @var{buffer} is @code{nil} (or omitted), the current buffer is used. -The counter can wrap around occasionally. @end defun @defun buffer-chars-modified-tick &optional buffer |