new functions to check locale validity

2008-02-25  Ray Strode  <rstrode@redhat.com>

	* gui/simple-greeter/gdm-languages.c:
	(language_name_is_valid),
	(language_name_is_utf8):
	new functions to check locale validity

svn path=/trunk/; revision=5864

2 files changed, 47 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 34f7ec28..1f6f1be8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,12 @@
 2008-02-25  Ray Strode  <rstrode@redhat.com>
 
+	* gui/simple-greeter/gdm-languages.c:
+	(language_name_is_valid),
+	(language_name_is_utf8):
+	new functions to check locale validity
+
+2008-02-25  Ray Strode  <rstrode@redhat.com>
+
 	* gui/simple-greeter/gdm-languages.c
 	(chooser_locale_free):
 	plug a small leak
diff --git a/gui/simple-greeter/gdm-languages.c b/gui/simple-greeter/gdm-languages.c
index 7084ad22..c826e792 100644
--- a/gui/simple-greeter/gdm-languages.c
+++ b/gui/simple-greeter/gdm-languages.c
@@ -30,6 +30,7 @@
 #include <errno.h>
 #include <dirent.h>
 #include <locale.h>
+#include <langinfo.h>
 #include <sys/stat.h>
 
 #include <glib.h>
@@ -314,6 +315,45 @@ nameentcmp (const void *a, const void *b)
                         ((const struct nameent *) b)->name);
 }
 
+static gboolean
+language_name_is_valid (const char *language_name)
+{
+        char     *old_locale;
+        gboolean  is_valid;
+
+        old_locale = g_strdup (setlocale (LC_MESSAGES, NULL));
+        is_valid = setlocale (LC_MESSAGES, language_name) != NULL;
+        setlocale (LC_MESSAGES, old_locale);
+        g_free (old_locale);
+
+        return is_valid;
+}
+
+static gboolean
+language_name_is_utf8 (const char *language_name)
+{
+        char     *old_locale;
+        char     *codeset;
+        gboolean  is_utf8;
+
+        old_locale = g_strdup (setlocale (LC_CTYPE, NULL));
+
+        if (setlocale (LC_CTYPE, language_name) == NULL) {
+                g_free (old_locale);
+                return FALSE;
+        }
+
+        codeset = normalize_codeset (nl_langinfo (CODESET));
+
+        is_utf8 = strcmp (codeset, "utf8") == 0;
+        g_free (codeset);
+
+        setlocale (LC_CTYPE, old_locale);
+        g_free (old_locale);
+
+        return is_utf8;
+}
+
 static void
 collect_locales_from_archive (void)
 {