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 "util.h"
24#ifdef HAVE_LANGINFO_H
25#include <langinfo.h>
26#endif
27#ifdef HAVE_LOCALE_H
28#include <locale.h>
29#endif
30#include <stdlib.h>
31#include <stdio.h>
32#include <string.h>
33
34void checklang(void)
35{
36  char *langsuff = NULL;
37  char *lang = getenv("LANG");
38
39#ifdef HAVE_LOCALE_H
40  // Set the locale in accordance with environment
41  setlocale(LC_ALL, "");
42#endif
43#ifdef HAVE_LANGINFO_H
44  langsuff = nl_langinfo(CODESET);
45#else
46  /*
47   * Check environment variables $LANG and $LC_CTYPE
48   * to see if we want to support UTF-8 unicode
49   */
50  if (lang != NULL) {
51    if (strlen(lang) > 5) {
52      langsuff = &lang[strlen(lang)-5];
53    }
54  }
55#endif
56  if (langsuff == NULL) {
57    printf("Could not determine language suffix for your system. Please check your setup!\n");
58  } else if (strcmp(langsuff, "UTF-8")) {
59    printf("Your system does not appear to have UTF-8 enabled ($LANG=\"%s\")\n", lang);
60    printf("If you want to have support for diacritics and Unicode characters,\n");
61    printf("please switch your locale to an UTF-8 locale, e.g. \"en_US.UTF-8\".\n");
62  }
63}
64