New module 'unicase/locale-language'.

[gnulib.git] / lib / unicase / locale-language.c

diff --git a/lib/unicase/locale-language.c b/lib/unicase/locale-language.c
new file mode 100644 (file)
index 0000000..074baa4
--- /dev/null
+++ b/lib/unicase/locale-language.c
@@ -0,0 +1,55 @@
+/* Language code of current locale.
+   Copyright (C) 2009 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2009.
+
+   This program is free software: you can redistribute it and/or modify it
+   under the terms of the GNU Lesser General Public License as published
+   by the Free Software Foundation; either version 3 of the License, 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "unicase.h"
+
+#include <locale.h>
+#include <string.h>
+
+#include "localename.h"
+
+#include "unicase/locale-languages.h"
+
+const char *
+uc_locale_language (void)
+{
+  const char *locale_name = gl_locale_name (LC_CTYPE, "LC_CTYPE");
+  const char *p;
+
+  /* Find the end of the language portion.  */
+  p = locale_name;
+  while (*p != '\0' && *p != '_' && *p != '.' && *p != '@')
+    p++;
+
+  /* Return a statically allocated pointer to the language portion, so that the
+     caller of this function does not need to free() the result.
+     We could use a dynamically built unification table.  But given that the
+     set of possible languages is small, it is easier (and excludes ENOMEM
+     error conditions) to allocate the unification table statically.  */
+  if (p != locale_name)
+    {
+      const char *language =
+       uc_locale_languages_lookup (locale_name, p - locale_name);
+      if (language != NULL)
+       return language;
+    }
+
+  return "";
+}