From: Bruno Haible <bruno@clisp.org>
Date: Mon, 6 Sep 2004 10:33:33 +0000 (+0000)
Subject: Function to determine the user's language preferences.
X-Git-Tag: v0.14.2~240
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9e4405bd50b659ff9f7fd4615b9e0e6760fb2617;p=thirdparty%2Fgettext.git

Function to determine the user's language preferences.
---

diff --git a/gettext-runtime/intl/langprefs.c b/gettext-runtime/intl/langprefs.c
new file mode 100644
index 000000000..2dcfeb625
--- /dev/null
+++ b/gettext-runtime/intl/langprefs.c
@@ -0,0 +1,128 @@
+/* Determine the user's language preferences.
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify it
+   under the terms of the GNU Library General Public License as published
+   by the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+   USA.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdlib.h>
+
+#if HAVE_CFPREFERENCESCOPYAPPVALUE
+# include <string.h>
+# include <CFPreferences.h>
+# include <CFPropertyList.h>
+# include <CFArray.h>
+# include <CFString.h>
+#endif
+
+/* Determine the user's language preferences, as a colon separated list of
+   locale names in XPG syntax
+     language[_territory[.codeset]][@modifier]
+   The result must not be freed; it is statically allocated.  */
+
+const char *
+_nl_language_preferences (void)
+{
+  const char *language;
+
+  language = getenv ("LANGUAGE");
+  if (language != NULL && language[0] != '\0')
+    return language;
+
+#if HAVE_CFPREFERENCESCOPYAPPVALUE /* MacOS X 10.2 or newer */
+  {
+    /* Cache the preferences list, since CoreFoundation calls are expensive.  */
+    static const char *cached_languages;
+    static int cache_initialized;
+
+    if (!cache_initialized)
+      {
+	CFPropertyListRef preferences =
+	  CFPreferencesCopyAppValue (CFSTR ("AppleLanguages"),
+				     kCFPreferencesCurrentApplication);
+	if (CFGetTypeID (preferences) == CFArrayGetTypeID ())
+	  {
+	    CFArrayRef prefArray = (CFArrayRef)preferences;
+	    int n = CFArrayGetCount (prefArray);
+	    char buf[256];
+	    size_t size = 0;
+	    int i;
+
+	    for (i = 0; i < n; i++)
+	      {
+		CFTypeRef element = CFArrayGetValueAtIndex (prefArray, i);
+		if (CFGetTypeID (element) == CFStringGetTypeID ()
+		    && CFStringGetCString ((CFStringRef)element,
+					   buf, sizeof (buf),
+					   kCFStringEncodingASCII))
+		  {
+		    size += strlen (buf) + 1;
+		    /* Most GNU programs use msgids in English and don't ship
+		       an en.mo message catalog.  Therefore when we see "en"
+		       in the preferences list, arrange for gettext() to
+		       return the msgid, and ignore all further elements of
+		       the preferences list.  */
+		    if (strcmp (buf, "en") == 0)
+		      break;
+		  }
+		else
+		  break;
+	      }
+	    if (size > 0)
+	      {
+		char *languages = (char *) malloc (size);
+
+		if (languages != NULL)
+		  {
+		    char *p = languages;
+
+		    for (i = 0; i < n; i++)
+		      {
+			CFTypeRef element =
+			  CFArrayGetValueAtIndex (prefArray, i);
+			if (CFGetTypeID (element) == CFStringGetTypeID ()
+			    && CFStringGetCString ((CFStringRef)element,
+						   buf, sizeof (buf),
+						   kCFStringEncodingASCII))
+			  {
+			    strcpy (p, buf);
+			    p += strlen (buf);
+			    *p++ = ':';
+			    if (strcmp (buf, "en") == 0)
+			      break;
+			  }
+			else
+			  break;
+		      }
+		    *--p = '\0';
+
+		    cached_languages = languages;
+		  }
+	      }
+	  }
+	cache_initialized = 1;
+      }
+    if (cached_languages != NULL)
+      return cached_languages;
+  }
+#endif
+
+  return NULL;
+}