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# mbsnrtowcs.m4 serial 6
dnl Copyright (C) 2008, 2010-2022 Free Software Foundation, 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_MBSNRTOWCS],
[
AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
dnl Persuade glibc <wchar.h> to declare mbsnrtowcs().
AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
AC_REQUIRE([AC_TYPE_MBSTATE_T])
gl_MBSTATE_T_BROKEN
AC_CHECK_FUNCS_ONCE([mbsnrtowcs])
if test $ac_cv_func_mbsnrtowcs = no; then
HAVE_MBSNRTOWCS=0
else
if test $REPLACE_MBSTATE_T = 1; then
REPLACE_MBSNRTOWCS=1
else
gl_MBSNRTOWCS_WORKS_IN_TRADITIONAL_LOCALE
case "$gl_cv_func_mbsnrtowcs_works_in_traditional_locale" in
*yes) ;;
*) REPLACE_MBSNRTOWCS=1 ;;
esac
fi
fi
])
# Prerequisites of lib/mbsnrtowcs.c.
AC_DEFUN([gl_PREREQ_MBSNRTOWCS], [
:
])
dnl Test whether mbsnrtowcs works in an ISO-8859-1 locale.
dnl Result is gl_cv_func_mbsnrtowcs_works_in_traditional_locale.
AC_DEFUN([gl_MBSNRTOWCS_WORKS_IN_TRADITIONAL_LOCALE],
[
AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([gt_LOCALE_FR])
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([whether mbsnrtowcs works in a traditional locale],
[gl_cv_func_mbsnrtowcs_works_in_traditional_locale],
[
dnl Initial guess, used when cross-compiling or when no suitable locale
dnl is present.
changequote(,)dnl
case "$host_os" in
# Guess no on Solaris.
solaris*) gl_cv_func_mbsnrtowcs_works_in_traditional_locale="guessing no" ;;
# Guess yes otherwise.
*) gl_cv_func_mbsnrtowcs_works_in_traditional_locale="guessing yes" ;;
esac
changequote([,])dnl
if test $LOCALE_FR != none; then
AC_RUN_IFELSE(
[AC_LANG_SOURCE([[
#include <locale.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
int main ()
{
/* This fails on Solaris 11.4:
mbsnrtowcs stores a wrong wide character: 0xDF instead of btowc (0xDF). */
if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)
{
/* Locale encoding is ISO-8859-1 or ISO-8859-15. */
char input[] = "B\374\337er"; /* "Büßer" */
mbstate_t state;
mbstate_t temp_state;
wchar_t wc;
size_t ret;
const char *src;
#define BUFSIZE 10
wchar_t buf[BUFSIZE];
{
size_t i;
for (i = 0; i < BUFSIZE; i++)
buf[i] = (wchar_t) 0xBADFACE;
}
memset (&state, '\0', sizeof (mbstate_t));
wc = (wchar_t) 0xBADFACE;
ret = mbrtowc (&wc, input, 1, &state);
if (!(ret == 1 && wc == 'B' && mbsinit (&state)))
return 1;
input[0] = '\0';
wc = (wchar_t) 0xBADFACE;
ret = mbrtowc (&wc, input + 1, 1, &state);
if (!(ret == 1 && wctob (wc) == (unsigned char) '\374' && mbsinit (&state)))
return 2;
input[1] = '\0';
src = input + 2;
temp_state = state;
ret = mbsnrtowcs (NULL, &src, 4, 1, &temp_state);
if (!(ret == 3 && src == input + 2 && mbsinit (&state)))
return 3;
src = input + 2;
ret = mbsnrtowcs (buf, &src, 4, 1, &state);
if (!(ret == 1))
return 4;
if (!(src == input + 3))
return 5;
if (!(buf[0] == btowc ((unsigned char) '\337')))
return 6;
}
return 0;
}]])],
[gl_cv_func_mbsnrtowcs_works_in_traditional_locale=yes],
[gl_cv_func_mbsnrtowcs_works_in_traditional_locale=no],
[:])
fi
])
])
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