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| author | Paul Eggert <eggert@cs.ucla.edu> | 2013-02-11 15:37:18 -0800 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2013-02-11 15:37:18 -0800 |
| commit | a84b7c5334e232913111b840f2283d0138a6f5fb (patch) | |
| tree | 8ee4e55f7059d1eb918fb5966cd81ee3f84153bc /m4/memrchr.m4 | |
| parent | 71d4202f204ea5fad93eb34406f0ef671630f271 (diff) | |
| download | emacs-a84b7c5334e232913111b840f2283d0138a6f5fb.tar.gz emacs-a84b7c5334e232913111b840f2283d0138a6f5fb.tar.bz2 emacs-a84b7c5334e232913111b840f2283d0138a6f5fb.zip | |
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.
Diffstat (limited to 'm4/memrchr.m4')
| -rw-r--r-- | m4/memrchr.m4 | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/m4/memrchr.m4 b/m4/memrchr.m4 new file mode 100644 index 00000000000..5920f5747b7 --- /dev/null +++ b/m4/memrchr.m4 @@ -0,0 +1,23 @@ +# memrchr.m4 serial 10 +dnl Copyright (C) 2002-2003, 2005-2007, 2009-2013 Free Software Foundation, +dnl Inc. +dnl This file is free software; the Free Software Foundation +dnl gives unlimited permission to copy and/or distribute it, +dnl with or without modifications, as long as this notice is preserved. + +AC_DEFUN([gl_FUNC_MEMRCHR], +[ + dnl Persuade glibc <string.h> to declare memrchr(). + AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) + + AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS]) + AC_CHECK_DECLS_ONCE([memrchr]) + if test $ac_cv_have_decl_memrchr = no; then + HAVE_DECL_MEMRCHR=0 + fi + + AC_CHECK_FUNCS([memrchr]) +]) + +# Prerequisites of lib/memrchr.c. +AC_DEFUN([gl_PREREQ_MEMRCHR], [:]) |