1/* Language code of current locale.
2   Copyright (C) 2009-2010 Free Software Foundation, Inc.
3   Written by Bruno Haible <bruno@clisp.org>, 2009.
4
5   This program is free software: you can redistribute it and/or modify it
6   under the terms of the GNU Lesser General Public License as published
7   by the Free Software Foundation; either version 3 of the License, or
8   (at your option) any later version.
9
10   This program is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13   Lesser General Public License for more details.
14
15   You should have received a copy of the GNU Lesser General Public License
16   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
17
18#include <config.h>
19
20/* Specification.  */
21#include "unicase.h"
22
23#include <locale.h>
24#include <string.h>
25
26#include "localename.h"
27
28#include "unicase/locale-languages.h"
29
30const char *
31uc_locale_language (void)
32{
33  const char *locale_name = gl_locale_name (LC_CTYPE, "LC_CTYPE");
34  const char *p;
35
36  /* Find the end of the language portion.  */
37  p = locale_name;
38  while (*p != '\0' && *p != '_' && *p != '.' && *p != '@')
39    p++;
40
41  /* Return a statically allocated pointer to the language portion, so that the
42     caller of this function does not need to free() the result.
43     We could use a dynamically built unification table.  But given that the
44     set of possible languages is small, it is easier (and excludes ENOMEM
45     error conditions) to allocate the unification table statically.  */
46  if (p != locale_name)
47    {
48      const char *language =
49        uc_locale_languages_lookup (locale_name, p - locale_name);
50      if (language != NULL)
51        return language;
52    }
53
54  return "";
55}
56