# serial 56

# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006,

# 2007, 2008, 2009, 2010 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.

dnl Initially derived from code in GNU grep.

dnl Mostly written by Jim Meyering.

AC_PREREQ([2.50])

AC_DEFUN([gl_REGEX],

[

AC_CHECK_HEADERS_ONCE([locale.h])

AC_ARG_WITH([included-regex],

[AS_HELP_STRING([--without-included-regex],

[don't compile regex; this is the default on systems

with recent-enough versions of the GNU C Library

(use with caution on other systems).])])

case $with_included_regex in #(

yes|no) ac_use_included_regex=$with_included_regex

;;

'')

# If the system regex support is good enough that it passes the

# following run test, then default to *not* using the included regex.c.

# If cross compiling, assume the test would fail and use the included

# regex.c.

AC_CACHE_CHECK([for working re_compile_pattern],

[gl_cv_func_re_compile_pattern_working],

[AC_RUN_IFELSE(

[AC_LANG_PROGRAM(

[AC_INCLUDES_DEFAULT[

#if HAVE_LOCALE_H

#include <locale.h>

#endif

#include <limits.h>

#include <regex.h>

]],

[[static struct re_pattern_buffer regex;

unsigned char folded_chars[UCHAR_MAX + 1];

int i;

const char *s;

struct re_registers regs;

#if HAVE_LOCALE_H

/* http://sourceware.org/ml/libc-hacker/2006-09/msg00008.html

This test needs valgrind to catch the bug on Debian

GNU/Linux 3.1 x86, but it might catch the bug better

on other platforms and it shouldn't hurt to try the

test here. */

if (setlocale (LC_ALL, "en_US.UTF-8"))

{

static char const pat[] = "insert into";

static char const data[] =

"\xFF\0\x12\xA2\xAA\xC4\xB1,K\x12\xC4\xB1*\xACK";

re_set_syntax (RE_SYNTAX_GREP | RE_HAT_LISTS_NOT_NEWLINE

| RE_ICASE);

memset (&regex, 0, sizeof regex);

s = re_compile_pattern (pat, sizeof pat - 1, &regex);

if (s)

return 1;

if (re_search (&regex, data, sizeof data - 1,

0, sizeof data - 1, &regs)

!= -1)

return 1;

if (! setlocale (LC_ALL, "C"))

return 1;

}

#endif

/* This test is from glibc bug 3957, reported by Andrew Mackey. */

re_set_syntax (RE_SYNTAX_EGREP | RE_HAT_LISTS_NOT_NEWLINE);

memset (&regex, 0, sizeof regex);

s = re_compile_pattern ("a[^x]b", 6, &regex);

if (s)

return 1;

/* This should fail, but succeeds for glibc-2.5. */

if (re_search (&regex, "a\nb", 3, 0, 3, &regs) != -1)

return 1;

/* This regular expression is from Spencer ere test number 75

in grep-2.3. */

re_set_syntax (RE_SYNTAX_POSIX_EGREP);

memset (&regex, 0, sizeof regex);

for (i = 0; i <= UCHAR_MAX; i++)

folded_chars[i] = i;

regex.translate = folded_chars;

s = re_compile_pattern ("a[[:@:>@:]]b\n", 11, &regex);

/* This should fail with _Invalid character class name_ error. */

if (!s)

return 1;

/* Ensure that [b-a] is diagnosed as invalid, when

using RE_NO_EMPTY_RANGES. */

re_set_syntax (RE_SYNTAX_POSIX_EGREP | RE_NO_EMPTY_RANGES);

memset (&regex, 0, sizeof regex);

s = re_compile_pattern ("a[b-a]", 6, &regex);

if (s == 0)

return 1;

/* This should succeed, but does not for glibc-2.1.3. */

memset (&regex, 0, sizeof regex);

s = re_compile_pattern ("{1", 2, &regex);

if (s)

return 1;

/* The following example is derived from a problem report

against gawk from Jorge Stolfi <stolfi@ic.unicamp.br>. */

memset (&regex, 0, sizeof regex);

s = re_compile_pattern ("[an\371]*n", 7, &regex);

if (s)

return 1;

/* This should match, but does not for glibc-2.2.1. */

if (re_match (&regex, "an", 2, 0, &regs) != 2)

return 1;

memset (&regex, 0, sizeof regex);

s = re_compile_pattern ("x", 1, &regex);

if (s)

return 1;

/* glibc-2.2.93 does not work with a negative RANGE argument. */

if (re_search (&regex, "wxy", 3, 2, -2, &regs) != 1)

return 1;

/* The version of regex.c in older versions of gnulib

ignored RE_ICASE. Detect that problem too. */

re_set_syntax (RE_SYNTAX_EMACS | RE_ICASE);

memset (&regex, 0, sizeof regex);

s = re_compile_pattern ("x", 1, &regex);

if (s)

return 1;

if (re_search (&regex, "WXY", 3, 0, 3, &regs) < 0)

return 1;

/* Catch a bug reported by Vin Shelton in

http://lists.gnu.org/archive/html/bug-coreutils/2007-06/msg00089.html

*/

re_set_syntax (RE_SYNTAX_POSIX_BASIC

& ~RE_CONTEXT_INVALID_DUP

& ~RE_NO_EMPTY_RANGES);

memset (&regex, 0, sizeof regex);

s = re_compile_pattern ("[[:alnum:]_-]\\\\+$", 16, &regex);

if (s)

return 1;

/* REG_STARTEND was added to glibc on 2004-01-15.

Reject older versions. */

if (! REG_STARTEND)

return 1;

#if 0

/* It would be nice to reject hosts whose regoff_t values are too

narrow (including glibc on hosts with 64-bit ptrdiff_t and

32-bit int), but we should wait until glibc implements this

feature. Otherwise, support for equivalence classes and

multibyte collation symbols would always be broken except

when compiling --without-included-regex. */

if (sizeof (regoff_t) < sizeof (ptrdiff_t)

|| sizeof (regoff_t) < sizeof (ssize_t))

return 1;

#endif

return 0;]])],

[gl_cv_func_re_compile_pattern_working=yes],

[gl_cv_func_re_compile_pattern_working=no],

dnl When crosscompiling, assume it is not working.

[gl_cv_func_re_compile_pattern_working=no])])

case $gl_cv_func_re_compile_pattern_working in #(

yes) ac_use_included_regex=no;; #(

no) ac_use_included_regex=yes;;

esac

;;

*) AC_MSG_ERROR([Invalid value for --with-included-regex: $with_included_regex])

;;

esac

if test $ac_use_included_regex = yes; then

AC_DEFINE([_REGEX_LARGE_OFFSETS], [1],

[Define if you want regoff_t to be at least as wide POSIX requires.])

AC_DEFINE([re_syntax_options], [rpl_re_syntax_options],

[Define to rpl_re_syntax_options if the replacement should be used.])

AC_DEFINE([re_set_syntax], [rpl_re_set_syntax],

[Define to rpl_re_set_syntax if the replacement should be used.])

AC_DEFINE([re_compile_pattern], [rpl_re_compile_pattern],

[Define to rpl_re_compile_pattern if the replacement should be used.])

AC_DEFINE([re_compile_fastmap], [rpl_re_compile_fastmap],

[Define to rpl_re_compile_fastmap if the replacement should be used.])

AC_DEFINE([re_search], [rpl_re_search],

[Define to rpl_re_search if the replacement should be used.])

AC_DEFINE([re_search_2], [rpl_re_search_2],

[Define to rpl_re_search_2 if the replacement should be used.])

AC_DEFINE([re_match], [rpl_re_match],

[Define to rpl_re_match if the replacement should be used.])

AC_DEFINE([re_match_2], [rpl_re_match_2],

[Define to rpl_re_match_2 if the replacement should be used.])

AC_DEFINE([re_set_registers], [rpl_re_set_registers],

[Define to rpl_re_set_registers if the replacement should be used.])

AC_DEFINE([re_comp], [rpl_re_comp],

[Define to rpl_re_comp if the replacement should be used.])

AC_DEFINE([re_exec], [rpl_re_exec],

[Define to rpl_re_exec if the replacement should be used.])

AC_DEFINE([regcomp], [rpl_regcomp],

[Define to rpl_regcomp if the replacement should be used.])

AC_DEFINE([regexec], [rpl_regexec],

[Define to rpl_regexec if the replacement should be used.])

AC_DEFINE([regerror], [rpl_regerror],

[Define to rpl_regerror if the replacement should be used.])

AC_DEFINE([regfree], [rpl_regfree],

[Define to rpl_regfree if the replacement should be used.])

AC_LIBOBJ([regex])

gl_PREREQ_REGEX

fi

])

# Prerequisites of lib/regex.c and lib/regex_internal.c.

AC_DEFUN([gl_PREREQ_REGEX],

[

AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])

AC_REQUIRE([AC_C_INLINE])

AC_REQUIRE([AC_C_RESTRICT])

AC_REQUIRE([AC_TYPE_MBSTATE_T])

AC_CHECK_HEADERS([libintl.h])

AC_CHECK_FUNCS_ONCE([isblank iswctype wcscoll])

AC_CHECK_DECLS([isblank], [], [], [#include <ctype.h>])

])