Tune by using memchr and memrchr.

* .bzrignore: Add string.h.
* admin/merge-gnulib (GNULIB_MODULES): Add memrchr.
* lib/gnulib.mk, m4/gnulib-comp.m4: Regenerate.
* lib/memrchr.c, lib/string.in.h, m4/memrchr.m4, m4/string_h.m4:
New files, from gnulib.
* src/doc.c (Fsnarf_documentation):
* src/fileio.c (Fsubstitute_in_file_name):
* src/search.c (find_newline, scan_newline):
* src/xdisp.c (pos_visible_p, display_count_lines):
Use memchr and memrchr rather than scanning byte-by-byte.
* src/search.c (find_newline): Rename from scan_buffer.
Omit first arg TARGET, as it's always '\n'.  All callers changed.

1 files changed, 9 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index b3d3958853b..30470f5730a 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,5 +1,14 @@
 2013-02-11  Paul Eggert  <eggert@cs.ucla.edu>
 
+        Tune by using memchr and memrchr.
+        * doc.c (Fsnarf_documentation):
+        * fileio.c (Fsubstitute_in_file_name):
+        * search.c (find_newline, scan_newline):
+        * xdisp.c (pos_visible_p, display_count_lines):
+        Use memchr and memrchr rather than scanning byte-by-byte.
+        * search.c (find_newline): Rename from scan_buffer.
+        Omit first arg TARGET, as it's always '\n'.  All callers changed.
+
         Clean up read_key_sequence a tiny bit more.
         * keyboard.c (read_char_x_menu_prompt) [HAVE_MENUS]:
         (read_key_sequence): Remove unused locals.