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
checklang(void)36 void 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