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(* virtctrl: A graphical management tool.
(C) Copyright 2007 Richard W.M. Jones, Red Hat Inc.
http://libvirt.org/
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*)
module C = Libvirt.Connect
module D = Libvirt.Domain
module N = Libvirt.Network
(* Given two lists, xs and ys, return a list of items which have been
* added to ys, items which are the same, and items which have been
* removed from ys.
* Returns a triplet (list of added, list of same, list of removed).
*)
let differences xs ys =
let rec d = function
 [], [] > (* Base case. *)
([], [], [])
 [], ys > (* All ys have been added. *)
(ys, [], [])
 xs, [] > (* All xs have been removed. *)
([], [], xs)
 (x :: xs), (y :: ys) when x = y > (* Not added or removed. *)
let added, unchanged, removed = d (xs, ys) in
added, x :: unchanged, removed
 (x :: xs), ((y :: _) as ys) when x < y > (* x removed. *)
let added, unchanged, removed = d (xs, ys) in
added, unchanged, x :: removed
 ((x :: _) as xs), (y :: ys) (* when x > y *) > (* y added. *)
let added, unchanged, removed = d (xs, ys) in
y :: added, unchanged, removed
in
d (List.sort compare xs, List.sort compare ys)
let string_of_domain_state = function
 D.InfoNoState > "unknown"
 D.InfoRunning > "running"
 D.InfoBlocked > "blocked"
 D.InfoPaused > "paused"
 D.InfoShutdown > "shutdown"
 D.InfoShutoff > "shutoff"
 D.InfoCrashed > "crashed"
(* Filter top level rows (only) in a tree_store. If function f returns
* true then the row remains, but if it returns false then the row is
* removed.
*)
let rec filter_top_level_rows (model : GTree.tree_store) f =
match model#get_iter_first with
 None > ()
 Some iter > filter_rows model f iter
(* Filter rows in a tree_store at a particular level. *)
and filter_rows model f row =
let keep = f row in
let iter_still_valid =
if not keep then model#remove row else model#iter_next row in
if iter_still_valid then filter_rows model f row
(* Find the first top level row matching predicate f and return it. *)
let rec find_top_level_row (model : GTree.tree_store) f =
match model#get_iter_first with
 None > raise Not_found (* no rows *)
 Some row > find_row model f row
(* Find the first row matching predicate f at a particular level. *)
and find_row model f row =
if f row then row
else if model#iter_next row then find_row model f row
else raise Not_found
(* Iterate over top level rows (only) in a tree_store. *)
let rec iter_top_level_rows (model : GTree.tree_store) f =
match model#get_iter_first with
 None > ()
 Some iter > iter_rows model f iter
(* Iterate over rows in a tree_store at a particular level. *)
and iter_rows model f row =
f row;
if model#iter_next row then iter_rows model f row
