2005-03-28 Roland McGrath <roland@redhat.com>

* locale/langinfo.h (_NL_LOCALE_NAME): New macro.
	[__USE_GNU] (NL_LOCALE_NAME): New macro.
	* locale/nl_langinfo.c: Grok special item value for _NL_LOCALE_NAME,
	return locale name string for the category.

locale/langinfo.h

@@ -1,5 +1,5 @@
 /* Access to locale-dependent parameters.
-   Copyright (C) 1995-2002, 2003, 2004 Free Software Foundation, Inc.
+   Copyright (C) 1995-2002,2003,2004,2005 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -38,7 +38,6 @@ __BEGIN_DECLS
 #define _NL_ITEM_CATEGORY(item)		((int) (item) >> 16)
 #define _NL_ITEM_INDEX(item)		((int) (item) & 0xffff)
 
-
 /* Enumeration of locale items that can be queried with `nl_langinfo'.  */
 enum
 {
@@ -566,6 +565,13 @@ enum
   _NL_NUM
 };
 
+/* This macro produces an item you can pass to `nl_langinfo' or
+   `nl_langinfo_l' to get the name of the locale in use for CATEGORY.  */
+#define _NL_LOCALE_NAME(category)	_NL_ITEM ((category), -1)
+#ifdef __USE_GNU
+# define NL_LOCALE_NAME(category)	_NL_LOCALE_NAME (category)
+#endif
+
 
 /* Return the current locale's value for ITEM.
    If ITEM is invalid, an empty string is returned.

locale/nl_langinfo.c

@@ -1,5 +1,6 @@
 /* User interface for extracting locale-dependent parameters.
-   Copyright (C) 1995,96,97,99,2000,01,02 Free Software Foundation, Inc.
+   Copyright (C) 1995,96,97,99,2000,2001,2002,2005
+	Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -45,6 +46,18 @@ nl_langinfo (item)
     /* Bogus category: bogus item.  */
     return (char *) "";
 
+  /* Special case value for NL_LOCALE_NAME (category).
+     This is not a real item index in the string table.  */
+  if (index == _NL_ITEM_INDEX (_NL_LOCALE_NAME (category)))
+    {
+#ifdef USE_IN_EXTENDED_LOCALE_MODEL
+# define THISLOCALE l
+#else
+# define THISLOCALE _NL_CURRENT_LOCALE
+#endif
+      return (char *) THISLOCALE->__names[category];
+    }
+
 #ifdef USE_IN_EXTENDED_LOCALE_MODEL
   data = l->__locales[category];
 #elif defined NL_CURRENT_INDIRECT