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emacs/m4/memrchr.m4
Paul Eggert a84b7c5334 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.
2013-02-11 15:37:18 -08:00

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# 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], [:])