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view m4/strings_h.m4 @ 9600:99268e709d31
Avoid quadratic strstr implementations.
* lib/strstr.c: New file.
* m4/strstr.m4: Likewise.
* modules/strstr: Likewise.
* modules/strstr-tests: Likewise.
* tests/test-strstr.c: Likewise.
* lib/string.in.h (rpl_strstr): Declare.
(memmem) [GNULIB_POSIXCHECK]: Document speed issue.
* m4/string_h.m4 (gl_HEADER_STRING_H_DEFAULTS): Support strstr.
* modules/string (Makefile.am): Likewise.
* MODULES.html.sh (string handling): Mention new module.
* doc/functions/strstr.texi (strstr): Document the bug.
Signed-off-by: Eric Blake <ebb9@byu.net>
author | Eric Blake <ebb9@byu.net> |
---|---|
date | Thu, 10 Jan 2008 07:38:11 -0700 |
parents | d7da1f241448 |
children | b5e42ef33b49 |
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# Configure a replacement for <string.h>. # Copyright (C) 2007 Free Software Foundation, Inc. # This file is free software; the Free Software Foundation # gives unlimited permission to copy and/or distribute it, # with or without modifications, as long as this notice is preserved. AC_DEFUN([gl_HEADER_STRINGS_H], [ dnl Use AC_REQUIRE here, so that the default behavior below is expanded dnl once only, before all statements that occur in other macros. AC_REQUIRE([gl_HEADER_STRINGS_H_BODY]) ]) AC_DEFUN([gl_HEADER_STRINGS_H_BODY], [ AC_REQUIRE([gl_HEADER_STRINGS_H_DEFAULTS]) gl_CHECK_NEXT_HEADERS([strings.h]) ]) AC_DEFUN([gl_STRINGS_MODULE_INDICATOR], [ dnl Use AC_REQUIRE here, so that the default settings are expanded once only. AC_REQUIRE([gl_HEADER_STRINGS_H_DEFAULTS]) GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1 ]) AC_DEFUN([gl_HEADER_STRINGS_H_DEFAULTS], [ dnl Assume proper GNU behavior unless another module says otherwise. HAVE_STRCASECMP=1; AC_SUBST([HAVE_STRCASECMP]) HAVE_DECL_STRNCASECMP=1; AC_SUBST([HAVE_DECL_STRNCASECMP]) ])