1# locale-zh.m4 serial 6
2dnl Copyright (C) 2003, 2005-2009 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6
7dnl From Bruno Haible.
8
9dnl Determine the name of a chinese locale with GB18030 encoding.
10AC_DEFUN([gt_LOCALE_ZH_CN],
11[
12  AC_REQUIRE([AC_CANONICAL_HOST])
13  AC_REQUIRE([AM_LANGINFO_CODESET])
14  AC_CACHE_CHECK([for a transitional chinese locale], [gt_cv_locale_zh_CN], [
15    AC_LANG_CONFTEST([AC_LANG_SOURCE([
16changequote(,)dnl
17#include <locale.h>
18#include <stdlib.h>
19#include <time.h>
20#if HAVE_LANGINFO_CODESET
21# include <langinfo.h>
22#endif
23#include <stdlib.h>
24#include <string.h>
25struct tm t;
26char buf[16];
27int main ()
28{
29  const char *p;
30  /* Check whether the given locale name is recognized by the system.  */
31  if (setlocale (LC_ALL, "") == NULL) return 1;
32  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
33     On MacOS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
34     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
35     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
36     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
37     some unit tests fail.  */
38#if HAVE_LANGINFO_CODESET
39  {
40    const char *cs = nl_langinfo (CODESET);
41    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0)
42      return 1;
43  }
44#endif
45#ifdef __CYGWIN__
46  /* On Cygwin, avoid locale names without encoding suffix, because the
47     locale_charset() function relies on the encoding suffix.  Note that
48     LC_ALL is set on the command line.  */
49  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
50#endif
51  /* Check whether in a month name, no byte in the range 0x80..0x9F occurs.
52     This excludes the UTF-8 encoding.  */
53  t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
54  if (strftime (buf, sizeof (buf), "%B", &t) < 2) return 1;
55  for (p = buf; *p != '\0'; p++)
56    if ((unsigned char) *p >= 0x80 && (unsigned char) *p < 0xa0)
57      return 1;
58  /* Check whether a typical GB18030 multibyte sequence is recognized as a
59     single wide character.  This excludes the GB2312 and GBK encodings.  */
60  if (mblen ("\203\062\332\066", 5) != 4)
61    return 1;
62  return 0;
63}
64changequote([,])dnl
65      ])])
66    if AC_TRY_EVAL([ac_link]) && test -s conftest$ac_exeext; then
67      # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
68      # otherwise on MacOS X 10.3.5 the LC_TIME=C from the beginning of the
69      # configure script would override the LC_ALL setting. Likewise for
70      # LC_CTYPE, which is also set at the beginning of the configure script.
71      # Test for the locale name without encoding suffix.
72      if (LC_ALL=zh_CN LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
73        gt_cv_locale_zh_CN=zh_CN
74      else
75        # Test for the locale name with explicit encoding suffix.
76        if (LC_ALL=zh_CN.GB18030 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
77          gt_cv_locale_zh_CN=zh_CN.GB18030
78        else
79          # None found.
80          gt_cv_locale_zh_CN=none
81        fi
82      fi
83    else
84      # If there was a link error, due to mblen(), the system is so old that
85      # it certainly doesn't have a chinese locale.
86      gt_cv_locale_zh_CN=none
87    fi
88    rm -fr conftest*
89  ])
90  LOCALE_ZH_CN=$gt_cv_locale_zh_CN
91  AC_SUBST([LOCALE_ZH_CN])
92])
93