root/lang/cplusplus/i3/trunk/intl.orig/langprefs.c @ 23350

Revision 17721, 3.7 kB (checked in by saturday06, 6 years ago)

intl.orig

Line 
1/* Determine the user's language preferences.
2   Copyright (C) 2004-2006 Free Software Foundation, Inc.
3
4   This program is free software; you can redistribute it and/or modify it
5   under the terms of the GNU Library General Public License as published
6   by the Free Software Foundation; either version 2, or (at your option)
7   any later version.
8
9   This program is distributed in the hope that it will be useful,
10   but WITHOUT ANY WARRANTY; without even the implied warranty of
11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12   Library General Public License for more details.
13
14   You should have received a copy of the GNU Library General Public
15   License along with this program; if not, write to the Free Software
16   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
17   USA.  */
18
19/* Written by Bruno Haible <bruno@clisp.org>.  */
20
21#ifdef HAVE_CONFIG_H
22# include <config.h>
23#endif
24
25#include <stdlib.h>
26
27#if HAVE_CFPREFERENCESCOPYAPPVALUE
28# include <string.h>
29# include <CoreFoundation/CFPreferences.h>
30# include <CoreFoundation/CFPropertyList.h>
31# include <CoreFoundation/CFArray.h>
32# include <CoreFoundation/CFString.h>
33extern void _nl_locale_name_canonicalize (char *name);
34#endif
35
36/* Determine the user's language preferences, as a colon separated list of
37   locale names in XPG syntax
38     language[_territory][.codeset][@modifier]
39   The result must not be freed; it is statically allocated.
40   The LANGUAGE environment variable does not need to be considered; it is
41   already taken into account by the caller.  */
42
43const char *
44_nl_language_preferences_default (void)
45{
46#if HAVE_CFPREFERENCESCOPYAPPVALUE /* MacOS X 10.2 or newer */
47  {
48    /* Cache the preferences list, since CoreFoundation calls are expensive.  */
49    static const char *cached_languages;
50    static int cache_initialized;
51
52    if (!cache_initialized)
53      {
54        CFTypeRef preferences =
55          CFPreferencesCopyAppValue (CFSTR ("AppleLanguages"),
56                                     kCFPreferencesCurrentApplication);
57        if (preferences != NULL
58            && CFGetTypeID (preferences) == CFArrayGetTypeID ())
59          {
60            CFArrayRef prefArray = (CFArrayRef)preferences;
61            int n = CFArrayGetCount (prefArray);
62            char buf[256];
63            size_t size = 0;
64            int i;
65
66            for (i = 0; i < n; i++)
67              {
68                CFTypeRef element = CFArrayGetValueAtIndex (prefArray, i);
69                if (element != NULL
70                    && CFGetTypeID (element) == CFStringGetTypeID ()
71                    && CFStringGetCString ((CFStringRef)element,
72                                           buf, sizeof (buf),
73                                           kCFStringEncodingASCII))
74                  {
75                    _nl_locale_name_canonicalize (buf);
76                    size += strlen (buf) + 1;
77                    /* Most GNU programs use msgids in English and don't ship
78                       an en.mo message catalog.  Therefore when we see "en"
79                       in the preferences list, arrange for gettext() to
80                       return the msgid, and ignore all further elements of
81                       the preferences list.  */
82                    if (strcmp (buf, "en") == 0)
83                      break;
84                  }
85                else
86                  break;
87              }
88            if (size > 0)
89              {
90                char *languages = (char *) malloc (size);
91
92                if (languages != NULL)
93                  {
94                    char *p = languages;
95
96                    for (i = 0; i < n; i++)
97                      {
98                        CFTypeRef element =
99                          CFArrayGetValueAtIndex (prefArray, i);
100                        if (element != NULL
101                            && CFGetTypeID (element) == CFStringGetTypeID ()
102                            && CFStringGetCString ((CFStringRef)element,
103                                                   buf, sizeof (buf),
104                                                   kCFStringEncodingASCII))
105                          {
106                            _nl_locale_name_canonicalize (buf);
107                            strcpy (p, buf);
108                            p += strlen (buf);
109                            *p++ = ':';
110                            if (strcmp (buf, "en") == 0)
111                              break;
112                          }
113                        else
114                          break;
115                      }
116                    *--p = '\0';
117
118                    cached_languages = languages;
119                  }
120              }
121          }
122        cache_initialized = 1;
123      }
124    if (cached_languages != NULL)
125      return cached_languages;
126  }
127#endif
128
129  return NULL;
130}
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