2006-03-30  Michael Natterer  <mitch@gimp.org>

	* app/pdb/procedural_db.[ch] (struct Argument): replace the value
	union by a GValue.

	(procedural_db_argument_init)
	(procedural_db_compat_arg_init): new functions to initialize
	an Argument. They call g_value_init() on the Argument's value.

	(procedural_db_arguments)
	(procedural_db_return_values): initialize the returned Argument
	arrays so their GValues are ready to use. Allow to get the
	(unsuccessful) return values of a NULL ProcRecord.

	(procedural_db_destroy_args): g_value_unset() the values. Added a
	"gboolean full_destroy" parameter. Its only effect is to destroy
	PDB arrays, everything else is nicely memory managed by GValue.

	(procedural_db_execute)
	(procedural_db_run_proc): do GValue stuff. Added n_args and
	n_return_vals parameters to execute().

	(procedural_db_execute_proc): private function to execute a
	procedure. Validates the passed in arguments using the registered
	GParamSpecs before passing them to the resp. exec method.

	* app/plug-in/plug-in-params.[ch] (plug_in_params_to_args): needs
	an array of ProcArgs now in order to initialize the Arguments'
	GValues correctly. Passing NULL ProcArgs uses
	procedural_db_compat_arg_init(), so procedures (plug-ins)
	returning more values than expected work.

	(plug_in_args_to_params): do GValue stuff here too.

	(plug_in_args_destroy): removed this function,
	procedural_db_destroy_args() does the same now.

	* app/plug-in/plug-in-message.c (plug_in_handle_proc_run):
	simplified quite a bit because everything returns n_return_values
	now. Call plug_in_params_to_args() only of the procedure was found.

	(plug_in_handle_proc_return_priv): pass ProcRecs to
	plug_in_params_to_args().

	* app/batch.c
	* app/actions/plug-in-commands.c
	* app/actions/vectors-commands.c
	* app/core/gimppdbprogress.c
	* app/dialogs/about-dialog.c
	* app/file/file-open.c
	* app/file/file-save.c
	* app/plug-in/plug-ins.c
	* app/plug-in/plug-in-progress.c
	* app/plug-in/plug-in-run.[ch]
	* app/widgets/gimphelp.c
	* app/widgets/gimppdbdialog.c
	* app/xcf/xcf.c
	* tools/pdbgen/pdb/fileops.pdb: changed accordingly: don't
	g_new/g_free Argument arrays, always use procedural_db_foo()
	functions. Use GValue functions to get/set Arguments.

	* tools/pdbgen/pdb.pl: added get_value_func and set_value_func to
	all PDB types. Removed id_func, id_ret_func and check_func. Added
	flags which indicated that a type is an ID. Removed unused utility
	functions.

	* tools/pdbgen/lib.pl: use the flag instead of looking at
	functions and value types.

	* tools/pdbgen/app.pl: use the get_value_func and set_value_func
	to marshal inargs and outargs. Removed all checks performed on
	inargs because that's done by GParamSpec validation now. Added the
	missing bits to register excluded values with GimpParamSpecEnum.

	* app/pdb/*_cmds.c: regenerated.