146 lines
4.5 KiB
Text
146 lines
4.5 KiB
Text
# wcrtomb.m4 serial 17
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dnl Copyright (C) 2008-2023 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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AC_DEFUN([gl_FUNC_WCRTOMB],
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[
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AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
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AC_REQUIRE([AC_TYPE_MBSTATE_T])
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gl_MBSTATE_T_BROKEN
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AC_CHECK_FUNCS_ONCE([wcrtomb])
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if test $ac_cv_func_wcrtomb = no; then
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HAVE_WCRTOMB=0
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AC_CHECK_DECLS([wcrtomb],,, [[
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#include <wchar.h>
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]])
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if test $ac_cv_have_decl_wcrtomb = yes; then
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dnl On Minix 3.1.8, the system's <wchar.h> declares wcrtomb() although
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dnl it does not have the function. Avoid a collision with gnulib's
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dnl replacement.
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REPLACE_WCRTOMB=1
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fi
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else
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dnl We don't actually need to override wcrtomb when redefining the semantics
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dnl of the mbstate_t type. Tested on 32-bit AIX.
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dnl if test $REPLACE_MBSTATE_T = 1; then
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dnl REPLACE_WCRTOMB=1
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dnl fi
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if test $REPLACE_WCRTOMB = 0; then
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dnl On Android 4.3, wcrtomb produces wrong characters in the C locale.
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dnl On AIX 4.3, OSF/1 5.1 and Solaris <= 11.3, wcrtomb (NULL, 0, NULL)
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dnl sometimes returns 0 instead of 1.
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AC_REQUIRE([AC_PROG_CC])
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AC_REQUIRE([gt_LOCALE_FR])
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AC_REQUIRE([gt_LOCALE_FR_UTF8])
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AC_REQUIRE([gt_LOCALE_JA])
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AC_REQUIRE([gt_LOCALE_ZH_CN])
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AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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AC_CACHE_CHECK([whether wcrtomb works in the C locale],
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[gl_cv_func_wcrtomb_works],
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[AC_RUN_IFELSE(
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[AC_LANG_SOURCE([[
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#include <string.h>
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#include <stdlib.h>
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#include <wchar.h>
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int main ()
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{
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mbstate_t state;
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char out[64];
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int count;
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memset (&state, 0, sizeof (state));
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out[0] = 'x';
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count = wcrtomb (out, L'a', &state);
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return !(count == 1 && out[0] == 'a');
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}]])],
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[gl_cv_func_wcrtomb_works=yes],
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[gl_cv_func_wcrtomb_works=no],
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[case "$host_os" in
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# Guess no on Android.
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linux*-android*) gl_cv_func_wcrtomb_works="guessing no";;
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# Guess yes otherwise.
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*) gl_cv_func_wcrtomb_works="guessing yes";;
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esac
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])
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])
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case "$gl_cv_func_wcrtomb_works" in
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*yes) ;;
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*) AC_DEFINE([WCRTOMB_C_LOCALE_BUG], [1],
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[Define if the wcrtomb function does not work in the C locale.])
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REPLACE_WCRTOMB=1 ;;
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esac
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fi
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if test $REPLACE_WCRTOMB = 0; then
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AC_CACHE_CHECK([whether wcrtomb return value is correct],
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[gl_cv_func_wcrtomb_retval],
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[
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dnl Initial guess, used when cross-compiling or when no suitable locale
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dnl is present.
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changequote(,)dnl
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case "$host_os" in
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# Guess no on AIX 4, OSF/1, Solaris, native Windows.
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aix4* | osf* | solaris* | mingw*) gl_cv_func_wcrtomb_retval="guessing no" ;;
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# Guess yes otherwise.
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*) gl_cv_func_wcrtomb_retval="guessing yes" ;;
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esac
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changequote([,])dnl
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if test $LOCALE_FR != none || test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none || test $LOCALE_ZH_CN != none; then
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AC_RUN_IFELSE(
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[AC_LANG_SOURCE([[
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#include <locale.h>
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#include <string.h>
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#include <wchar.h>
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#include <stdlib.h>
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int main ()
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{
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int result = 0;
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if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)
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{
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if (wcrtomb (NULL, 0, NULL) != 1)
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result |= 1;
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}
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if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
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{
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if (wcrtomb (NULL, 0, NULL) != 1)
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result |= 2;
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{
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wchar_t wc = (wchar_t) 0xBADFACE;
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if (mbtowc (&wc, "\303\274", 2) == 2)
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if (wcrtomb (NULL, wc, NULL) != 1)
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result |= 2;
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}
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}
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if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
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{
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if (wcrtomb (NULL, 0, NULL) != 1)
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result |= 4;
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}
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if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
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{
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if (wcrtomb (NULL, 0, NULL) != 1)
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result |= 8;
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}
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return result;
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}]])],
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[gl_cv_func_wcrtomb_retval=yes],
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[gl_cv_func_wcrtomb_retval=no],
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[:])
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fi
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])
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case "$gl_cv_func_wcrtomb_retval" in
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*yes) ;;
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*) AC_DEFINE([WCRTOMB_RETVAL_BUG], [1],
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[Define if the wcrtomb function has an incorrect return value.])
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REPLACE_WCRTOMB=1 ;;
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esac
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fi
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fi
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])
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# Prerequisites of lib/wcrtomb.c.
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AC_DEFUN([gl_PREREQ_WCRTOMB], [
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:
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])
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