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
checklang(void)34 void 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