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Giac_maj/giac-1.4.9/intl/langprefs.c 3.69 KB
6663b6c9   adorian   projet complet av...
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  /* Determine the user's language preferences.
     Copyright (C) 2004-2005 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
     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>
  extern void _nl_locale_name_canonicalize (char *name);
  #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.
     The LANGUAGE environment variable does not need to be considered; it is
     already taken into account by the caller.  */
  
  const char *
  _nl_language_preferences_default (void)
  {
  #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)
        {
  	CFTypeRef preferences =
  	  CFPreferencesCopyAppValue (CFSTR ("AppleLanguages"),
  				     kCFPreferencesCurrentApplication);
  	if (preferences != NULL
  	    && 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 (element != NULL
  		    && CFGetTypeID (element) == CFStringGetTypeID ()
  		    && CFStringGetCString ((CFStringRef)element,
  					   buf, sizeof (buf),
  					   kCFStringEncodingASCII))
  		  {
  		    _nl_locale_name_canonicalize (buf);
  		    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 (element != NULL
  		            && CFGetTypeID (element) == CFStringGetTypeID ()
  			    && CFStringGetCString ((CFStringRef)element,
  						   buf, sizeof (buf),
  						   kCFStringEncodingASCII))
  			  {
  			    _nl_locale_name_canonicalize (buf);
  			    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;
  }