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hivex_200_write.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.
*)
(* Test some significant write operations. Take the minimal hive
* and algorithmically construct a large, deep hive.
*)
open Unix
open Printf
let (//) = Filename.concat
let srcdir = try Sys.getenv "srcdir" with Not_found -> "."
let () =
let h = Hivex.open_file (srcdir // "../images/minimal") [Hivex.OPEN_WRITE] in
let degrees = [| 3; 1; 4; 1; 5; 9; 2 |] (* ~1000 nodes *) in
let numbers = [| "Zero"; "One"; "Two"; "Three"; "Four";
"Five"; "Six"; "Seven"; "Eight"; "Nine" |] in
let animals = [| "Horse"; "Ant"; "Mouse"; "Rabbit"; "Cat";
"Giraffe"; "Kangaroo"; "Tiger"; "Zebra"; "Elephant" |] in
let rec iter depth posn parent =
if depth < Array.length degrees then (
let degree = degrees.(depth) in
for i = 0 to degree-1 do
let node_name = numbers.(depth) ^ " " ^ animals.(i) in
let node = Hivex.node_add_child h parent node_name in
iter (depth+1) i node
done;
let values = Array.init (10-posn) (
fun i ->
{ Hivex.key = animals.(i);
t = Hivex.REG_SZ;
value = utf16le_of_ascii numbers.(i) }
) in
Hivex.node_set_values h parent values
)
(* Make a nul-terminated UTF16-LE string from an ASCII string. *)
and utf16le_of_ascii str =
let len = String.length str in
let len' = len * 2 + 2 in
let str' = String.create len' in
for i = 0 to len-1 do
str'.[i*2] <- str.[i];
str'.[i*2+1] <- '\000'
done;
str'.[len'-2] <- '\000';
str'.[len'-1] <- '\000';
str'
in
iter 0 0 (Hivex.root h);
(* Discard the changes. *)
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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