-/* Formats a value according to FORMAT
- The returned string must be freed when no longer required */
-gchar * value_to_text (union value v, struct fmt_spec format);
+/* Returns a new GParamSpec for a string. An attempt to store the empty string
+ in the parameter will be silently translated into storing a null pointer. */
+static inline GParamSpec *
+null_if_empty_param (const gchar *name, const gchar *nick,
+ const gchar *blurb, const gchar *default_value,
+ GParamFlags flags)
+{
+ GParamSpec *param;
+
+ param = g_param_spec_string (name, nick, blurb, default_value, flags);
+ ((GParamSpecString *) param)->null_fold_if_empty = TRUE;
+ return param;
+}