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# locale-zh.m4 serial 6
dnl Copyright (C) 2003, 2005-2010 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.
dnl From Bruno Haible.
dnl Determine the name of a chinese locale with GB18030 encoding.
AC_DEFUN([gt_LOCALE_ZH_CN],
[
AC_REQUIRE([AC_CANONICAL_HOST])
AC_REQUIRE([AM_LANGINFO_CODESET])
AC_CACHE_CHECK([for a transitional chinese locale], [gt_cv_locale_zh_CN], [
AC_LANG_CONFTEST([AC_LANG_SOURCE([
changequote(,)dnl
#include <locale.h>
#include <stdlib.h>
#include <time.h>
#if HAVE_LANGINFO_CODESET
# include <langinfo.h>
#endif
#include <stdlib.h>
#include <string.h>
struct tm t;
char buf[16];
int main ()
{
const char *p;
/* Check whether the given locale name is recognized by the system. */
if (setlocale (LC_ALL, "") == NULL) return 1;
/* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
On MacOS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
succeeds but then nl_langinfo(CODESET) is "646". In this situation,
some unit tests fail. */
#if HAVE_LANGINFO_CODESET
{
const char *cs = nl_langinfo (CODESET);
if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0)
return 1;
}
#endif
#ifdef __CYGWIN__
/* On Cygwin, avoid locale names without encoding suffix, because the
locale_charset() function relies on the encoding suffix. Note that
LC_ALL is set on the command line. */
if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
#endif
/* Check whether in a month name, no byte in the range 0x80..0x9F occurs.
This excludes the UTF-8 encoding. */
t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
if (strftime (buf, sizeof (buf), "%B", &t) < 2) return 1;
for (p = buf; *p != '\0'; p++)
if ((unsigned char) *p >= 0x80 && (unsigned char) *p < 0xa0)
return 1;
/* Check whether a typical GB18030 multibyte sequence is recognized as a
single wide character. This excludes the GB2312 and GBK encodings. */
if (mblen ("\203\062\332\066", 5) != 4)
return 1;
return 0;
}
changequote([,])dnl
])])
if AC_TRY_EVAL([ac_link]) && test -s conftest$ac_exeext; then
# Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
# otherwise on MacOS X 10.3.5 the LC_TIME=C from the beginning of the
# configure script would override the LC_ALL setting. Likewise for
# LC_CTYPE, which is also set at the beginning of the configure script.
# Test for the locale name without encoding suffix.
if (LC_ALL=zh_CN LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
gt_cv_locale_zh_CN=zh_CN
else
# Test for the locale name with explicit encoding suffix.
if (LC_ALL=zh_CN.GB18030 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
gt_cv_locale_zh_CN=zh_CN.GB18030
else
# None found.
gt_cv_locale_zh_CN=none
fi
fi
else
# If there was a link error, due to mblen(), the system is so old that
# it certainly doesn't have a chinese locale.
gt_cv_locale_zh_CN=none
fi
rm -fr conftest*
])
LOCALE_ZH_CN=$gt_cv_locale_zh_CN
AC_SUBST([LOCALE_ZH_CN])
])
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