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# wcsrtombs.m4 serial 13
dnl Copyright (C) 2008-2023 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_WCSRTOMBS],
[
AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
AC_REQUIRE([AC_TYPE_MBSTATE_T])
gl_MBSTATE_T_BROKEN
AC_CHECK_FUNCS_ONCE([wcsrtombs])
if test $ac_cv_func_wcsrtombs = no; then
HAVE_WCSRTOMBS=0
AC_CHECK_DECLS([wcsrtombs],,, [[
#include <wchar.h>
]])
if test $ac_cv_have_decl_wcsrtombs = yes; then
dnl On Minix 3.1.8, the system's <wchar.h> declares wcsrtombs() although
dnl it does not have the function. Avoid a collision with gnulib's
dnl replacement.
REPLACE_WCSRTOMBS=1
fi
else
if test $REPLACE_MBSTATE_T = 1; then
REPLACE_WCSRTOMBS=1
else
gl_WCSRTOMBS_TERMINATION
gl_WCSRTOMBS_NULL
case "$gl_cv_func_wcsrtombs_termination" in
*yes) ;;
*) AC_DEFINE([WCSRTOMBS_TERMINATION_BUG], [1],
[Define if the wcsrtombs function may set the source pointer to NULL without NUL-terminating the destination.])
REPLACE_WCSRTOMBS=1 ;;
esac
case "$gl_cv_func_wcsrtombs_null" in
*yes) ;;
*) AC_DEFINE([WCSRTOMBS_NULL_ARG_BUG], [1],
[Define if the wcsrtombs function has the NULL destination argument bug.])
REPLACE_WCSRTOMBS=1 ;;
esac
fi
fi
])
dnl Test whether the wcsrtombs implementation stores a non-NULL source pointer
dnl as long as it has not written the final NUL byte to the destination string.
dnl The OSF/1 5.1 implementation stores a NULL pointer already after storing
dnl the last non-NUL character, even if there is no more room for the
dnl terminating NUL character.
dnl Result is gl_cv_func_wcsrtombs_termination.
AC_DEFUN([gl_WCSRTOMBS_TERMINATION],
[
AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([gt_LOCALE_FR])
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([whether wcsrtombs updates the source pointer correctly],
[gl_cv_func_wcsrtombs_termination],
[
dnl Initial guess, used when cross-compiling or when no suitable locale
dnl is present.
changequote(,)dnl
case "$host_os" in
# Guess no on OSF/1.
osf*) gl_cv_func_wcsrtombs_termination="guessing no" ;;
# Guess yes on native Windows.
mingw*) gl_cv_func_wcsrtombs_termination="guessing yes" ;;
# Guess yes otherwise.
*) gl_cv_func_wcsrtombs_termination="guessing yes" ;;
esac
changequote([,])dnl
if test $LOCALE_FR != none; then
AC_RUN_IFELSE(
[AC_LANG_SOURCE([[
#include <locale.h>
#include <stdlib.h>
#include <wchar.h>
int main ()
{
if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)
{
const char original[] = "B\374\337er";
wchar_t input[10];
if (mbstowcs (input, original, 10) == 5)
{
const wchar_t *src = input;
char output[5];
wcsrtombs (output, &src, 5, NULL);
if (src != input + 5)
return 1;
}
}
return 0;
}]])],
[gl_cv_func_wcsrtombs_termination=yes],
[gl_cv_func_wcsrtombs_termination=no],
[:])
fi
])
])
dnl Test whether the wcsrtombs implementation supports a NULL argument
dnl correctly. This is not the case on HP-UX 11.11 and OSF/1 5.1: These
dnl implementations updates the source pointer also if the destination argument
dnl is NULL.
dnl Result is gl_cv_func_wcsrtombs_null.
AC_DEFUN([gl_WCSRTOMBS_NULL],
[
AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([gt_LOCALE_FR])
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([whether wcsrtombs supports a NULL argument correctly],
[gl_cv_func_wcsrtombs_null],
[
dnl Initial guess, used when cross-compiling or when no suitable locale
dnl is present.
changequote(,)dnl
case "$host_os" in
# Guess no on HP-UX, OSF/1, mingw.
hpux* | osf* | mingw*) gl_cv_func_wcsrtombs_null="guessing no" ;;
# Guess yes on native Windows.
mingw*) gl_cv_func_wcsrtombs_null="guessing yes" ;;
# Guess yes otherwise.
*) gl_cv_func_wcsrtombs_null="guessing yes" ;;
esac
changequote([,])dnl
if test $LOCALE_FR != none; then
AC_RUN_IFELSE(
[AC_LANG_SOURCE([[
#include <locale.h>
#include <stdlib.h>
#include <wchar.h>
int main ()
{
int result = 0;
if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)
{
const char original[] = "B\374\337er";
wchar_t input[10];
if (mbstowcs (input, original, 10) == 5)
{
const wchar_t *src = input;
size_t ret = wcsrtombs (NULL, &src, 3, NULL);
if (ret != 5)
result |= 1;
if (src != input)
result |= 2;
}
}
return result;
}]])],
[gl_cv_func_wcsrtombs_null=yes],
[gl_cv_func_wcsrtombs_null=no],
[:])
fi
])
])
# Prerequisites of lib/wcsrtombs.c.
AC_DEFUN([gl_PREREQ_WCSRTOMBS], [
:
])
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