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, 6 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index d5ca6c17b54..0da3969fa11 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
 2013-02-11  Paul Eggert  <eggert@cs.ucla.edu>
 
+        Tune by using memchr and memrchr.
+        * .bzrignore: Add string.h.
+        * 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.
+
         Merge from gnulib, incorporating:
         2013-02-11 unsetenv etc.: port to Solaris 11 + GNU Emacs
         2013-02-09 secure_getenv: fix C++ declaration typo