1/**
2 * \file util.c
3 * A set of common utility functions found
4 * in all samples.
5 *
6 * Copyright (C) 2008 Linus Walleij <triad@df.lth.se>
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 * Boston, MA 02111-1307, USA.
22 */
23#include "config.h"
24#include "util.h"
25#ifdef HAVE_LANGINFO_H
26#include <langinfo.h>
27#endif
28#ifdef HAVE_LOCALE_H
29#include <locale.h>
30#endif
31#include <stdlib.h>
32#include <stdio.h>
33#include <string.h>
34#include <strings.h>
35
36void checklang(void)
37{
38  const char *langsuff = NULL;
39  const char *lang = getenv("LANG");
40
41#ifdef HAVE_LOCALE_H
42  // Set the locale in accordance with environment
43  setlocale(LC_ALL, "");
44#endif
45#ifdef HAVE_LANGINFO_H
46  langsuff = nl_langinfo(CODESET);
47#else
48  /*
49   * Check environment variables $LANG and $LC_CTYPE
50   * to see if we want to support UTF-8 unicode
51   */
52  if (lang != NULL) {
53    const char *sep = strrchr(lang, '.');
54    if (sep != NULL) {
55      langsuff = sep + 1;
56    } else {
57      langsuff = lang;
58    }
59  }
60#endif
61  if (langsuff == NULL) {
62    printf("Could not determine language suffix for your system. Please check your setup!\n");
63  } else if (strcasecmp(langsuff, "UTF-8") && strcasecmp(langsuff, "UTF8")) {
64    printf("Your system does not appear to have UTF-8 enabled ($LANG=\"%s\")\n", lang);
65    printf("If you want to have support for diacritics and Unicode characters,\n");
66    printf("please switch your locale to an UTF-8 locale, e.g. \"en_US.UTF-8\".\n");
67  }
68}
69