2005-02-20 Andrew Cagney <cagney@gnu.org>

	* cli/cli-decode.c (add_setshow_optional_filename_cmd): New
	function.
	* cli/cli-setshow.c (deprecated_show_value_hack)
	(do_setshow_command): Handle var_optional_filename.
	* command.h (enum var_types): Add var_optional_filename.
	(add_setshow_optional_filename_cmd): Declare.
	* infcmd.c (notice_args_read): Use.

1 files changed, 16 insertions, 2 deletions

diff --git a/gdb/command.h b/gdb/command.h
index dcebe49..cace34f 100644
--- a/gdb/command.h
+++ b/gdb/command.h
@@ -80,8 +80,11 @@ typedef enum var_types
     /* String which stores what the user types verbatim.
        *VAR is a malloc'd string, or NULL if the string is empty.  */
     var_string_noescape,
-    /* String which stores a filename.
-       *VAR is a malloc'd string, or NULL if the string is empty.  */
+    /* String which stores a filename.  (*VAR) is a malloc'd string,
+       or "" if the string was empty.  */
+    var_optional_filename,
+    /* String which stores a filename.  (*VAR) is a malloc'd
+       string.  */
     var_filename,
     /* ZeroableInteger.  *VAR is an int.  Like Unsigned Integer except
        that zero really means zero.  */
@@ -301,6 +304,17 @@ extern void add_setshow_string_noescape_cmd (char *name,
 					     struct cmd_list_element **set_list,
 					     struct cmd_list_element **show_list);
 
+extern void add_setshow_optional_filename_cmd (char *name,
+					       enum command_class class,
+					       char **var,
+					       const char *set_doc,
+					       const char *show_doc,
+					       const char *help_doc,
+					       cmd_sfunc_ftype *set_func,
+					       show_value_ftype *show_func,
+					       struct cmd_list_element **set_list,
+					       struct cmd_list_element **show_list);
+
 extern void add_setshow_integer_cmd (char *name,
 				     enum command_class class,
 				     unsigned int *var,