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|
# c32rtomb.m4
# serial 8
dnl Copyright (C) 2020-2024 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_C32RTOMB],
[
AC_REQUIRE([gl_UCHAR_H_DEFAULTS])
AC_REQUIRE([AC_CANONICAL_HOST])
AC_REQUIRE([gl_MBRTOC32_SANITYCHECK])
AC_REQUIRE([gl_C32RTOMB_SANITYCHECK])
AC_REQUIRE([gl_CHECK_FUNC_C32RTOMB])
if test $gl_cv_func_c32rtomb = no; then
HAVE_C32RTOMB=0
else
dnl When we override mbrtoc32, redefining the meaning of the char32_t
dnl values, we need to override c32rtomb as well, for consistency.
if test $HAVE_WORKING_MBRTOC32 = 0; then
REPLACE_C32RTOMB=1
fi
AC_CACHE_CHECK([whether c32rtomb return value is correct],
[gl_cv_func_c32rtomb_retval],
[
dnl Initial guess, used when cross-compiling.
changequote(,)dnl
case "$host_os" in
# Guess no on AIX.
aix*) gl_cv_func_c32rtomb_retval="guessing no" ;;
# Guess yes otherwise.
*) gl_cv_func_c32rtomb_retval="guessing yes" ;;
esac
changequote([,])dnl
AC_RUN_IFELSE(
[AC_LANG_SOURCE([[
#include <stddef.h>
#ifdef __HAIKU__
#include <stdint.h>
#endif
#include <uchar.h>
int main ()
{
int result = 0;
if (c32rtomb (NULL, 0, NULL) != 1)
result |= 1;
return result;
}]])],
[gl_cv_func_c32rtomb_retval=yes],
[gl_cv_func_c32rtomb_retval=no],
[:])
])
case "$gl_cv_func_c32rtomb_retval" in
*yes) ;;
*) AC_DEFINE([C32RTOMB_RETVAL_BUG], [1],
[Define if the c32rtomb function has an incorrect return value.])
REPLACE_C32RTOMB=1 ;;
esac
if test $HAVE_WORKING_C32RTOMB = 0; then
REPLACE_C32RTOMB=1
fi
fi
])
AC_DEFUN([gl_CHECK_FUNC_C32RTOMB],
[
dnl Cf. gl_CHECK_FUNCS_ANDROID
AC_CHECK_DECL([c32rtomb], , ,
[[#ifdef __HAIKU__
#include <stdint.h>
#endif
#include <uchar.h>
]])
if test $ac_cv_have_decl_c32rtomb = yes; then
dnl We can't use AC_CHECK_FUNC here, because c32rtomb() is defined as a
dnl static inline function on Haiku 2020.
AC_CACHE_CHECK([for c32rtomb], [gl_cv_func_c32rtomb],
[AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[[#include <stdlib.h>
#ifdef __HAIKU__
#include <stdint.h>
#endif
#include <uchar.h>
]],
[[char buf[8];
return c32rtomb (buf, 0, NULL) == 0;
]])
],
[gl_cv_func_c32rtomb=yes],
[gl_cv_func_c32rtomb=no])
])
else
gl_cv_func_c32rtomb=no
fi
])
dnl Test whether c32rtomb works not worse than wcrtomb.
dnl Result is HAVE_WORKING_C32RTOMB.
AC_DEFUN([gl_C32RTOMB_SANITYCHECK],
[
AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([gl_TYPE_CHAR32_T])
AC_REQUIRE([gl_CHECK_FUNC_C32RTOMB])
AC_REQUIRE([gt_LOCALE_ZH_CN])
AC_REQUIRE([AC_CANONICAL_HOST])
if test $GNULIBHEADERS_OVERRIDE_CHAR32_T = 1 || test $gl_cv_func_c32rtomb = no; then
HAVE_WORKING_C32RTOMB=0
else
AC_CACHE_CHECK([whether c32rtomb works as well as wcrtomb],
[gl_cv_func_c32rtomb_sanitycheck],
[
dnl Initial guess, used when cross-compiling or when no suitable locale
dnl is present.
changequote(,)dnl
case "$host_os" in
# Guess no on Solaris derivatives.
solaris*)
if test -f /etc/release && grep 'Oracle Solaris' /etc/release >/dev/null; then
gl_cv_func_c32rtomb_sanitycheck="guessing yes"
else
gl_cv_func_c32rtomb_sanitycheck="guessing no"
fi
;;
# Guess yes otherwise.
*)
gl_cv_func_c32rtomb_sanitycheck="guessing yes"
;;
esac
changequote([,])dnl
if test $LOCALE_ZH_CN != none; then
AC_RUN_IFELSE(
[AC_LANG_SOURCE([[
#include <locale.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#ifdef __HAIKU__
#include <stdint.h>
#endif
#include <uchar.h>
int main ()
{
int result = 0;
/* This fails on Solaris 11 OmniOS:
c32rtomb returns (size_t)-1.
wcrtomb returns 4 (correct). */
if (strcmp ("$LOCALE_ZH_CN", "none") != 0
&& setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
{
mbstate_t state;
wchar_t wc = (wchar_t) 0xBADFACE;
char buf[16];
memset (&state, '\0', sizeof (mbstate_t));
if (mbrtowc (&wc, "\201\060\211\070", 4, &state) == 4
&& wcrtomb (buf, wc, NULL) == 4
&& memcmp (buf, "\201\060\211\070", 4) == 0)
{
char32_t c32 = (wchar_t) 0xBADFACE;
memset (&state, '\0', sizeof (mbstate_t));
if (mbrtoc32 (&c32, "\201\060\211\070", 4, &state) == 4
&& c32rtomb (buf, c32, NULL) != 4)
result |= 1;
}
}
return result;
}]])],
[gl_cv_func_c32rtomb_sanitycheck=yes],
[gl_cv_func_c32rtomb_sanitycheck=no],
[:])
fi
])
case "$gl_cv_func_c32rtomb_sanitycheck" in
*yes)
HAVE_WORKING_C32RTOMB=1
AC_DEFINE([HAVE_WORKING_C32RTOMB], [1],
[Define if the c32rtomb function basically works.])
;;
*) HAVE_WORKING_C32RTOMB=0 ;;
esac
fi
AC_SUBST([HAVE_WORKING_C32RTOMB])
])
|
