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hivex_300_fold.ml
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(* hivex OCaml bindings
* Copyright (C) 2009-2010 Red Hat Inc.
*
* 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.
*)
(* Fold over the large hive. *)
open Unix
open Printf
let (//) = Filename.concat
(* This is a generic function to fold over hives.
* fn : 'a -> node -> 'a is called for each node
* fv : 'a -> node -> value array -> 'a is called for the values at each node
*)
let hive_fold h fn fv a root =
let rec fold a node =
let a = fn a node in
let a = fv a node (Hivex.node_values h node) in
Array.fold_left fold a (Hivex.node_children h node)
in
fold a root
let () =
let h = Hivex.open_file ("../images/large") [] in
(* Count the number of nodes and values in the hive. *)
let count_node (nodes, values) _ = (nodes+1, values) in
let count_values (nodes, values) _ vs = (nodes, values + Array.length vs) in
let root = Hivex.root h in
let (nodes, values) = hive_fold h count_node count_values (0, 0) root in
printf "large test hive contains %d nodes and %d values\n%!" nodes values;
Hivex.close h;
(* Gc.compact is a good way to ensure we don't have
* heap corruption or double-freeing.
*)
Gc.compact ()

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