X-Git-Url: http://git.annexia.org/?a=blobdiff_plain;f=utils.ml;h=0bf18fa94a791d714b0c7bcc54da359a39ebb427;hb=refs%2Ftags%2F0.1.7;hp=02bd7a0dd4cd28d9e4a0ea583cc63c4fb794761e;hpb=02614e74adee2a5d499bd557a6adde99a3c56e73;p=guestfs-browser.git

diff --git a/utils.ml b/utils.ml
index 02bd7a0..0bf18fa 100644
--- a/utils.ml
+++ b/utils.ml
@@ -17,6 +17,7 @@
  *)
 
 open ExtString
+open ExtList
 
 open Printf
 
@@ -88,10 +89,14 @@ let unique = let i = ref 0 in fun () -> incr i; !i
 let mklabel text =
   (GMisc.label ~text () :> GObj.widget)
 
-(* XXX No binding for g_markup_escape in lablgtk2. *)
+(* g_markup_escape is not bound by lablgtk2, but we want to provide
+ * extra protection for \0 characters appearing in the string
+ * anyway.
+ *)
 let markup_escape name =
   let f = function
     | '&' -> "&amp;" | '<' -> "&lt;" | '>' -> "&gt;"
+    | '\000' -> "\\0"
     | c -> String.make 1 c
   in
   String.replace_chars f name
@@ -139,3 +144,82 @@ and is_wo mode =           test_bit 0o002L mode
 and is_xo mode =           test_bit 0o001L mode
 
 and test_bit mask mode = Int64.logand mode mask = mask
+
+let tmpdir () =
+  let chan = open_in "/dev/urandom" in
+  let data = String.create 16 in
+  really_input chan data 0 (String.length data);
+  close_in chan;
+  let data = Digest.to_hex (Digest.string data) in
+  (* Note this is secure, because if the name already exists, even as a
+   * symlink, mkdir(2) will fail.
+   *)
+  let tmpdir = Filename.temp_dir_name // sprintf "guestfsbrowser%s.tmp" data in
+  Unix.mkdir tmpdir 0o700;
+  at_exit
+    (fun () ->
+       let cmd = sprintf "rm -rf %s" (Filename.quote tmpdir) in
+       ignore (Sys.command cmd));
+  tmpdir
+
+module CE = CamomileLibraryDefault.Camomile.CharEncoding
+module UTF8 = CamomileLibraryDefault.Camomile.UTF8
+module UChar = CamomileLibraryDefault.Camomile.UChar
+let utf16le = CE.utf16le
+let utf8 = CE.utf8
+let recode = CE.recode_string ~in_enc:utf16le ~out_enc:utf8
+
+let windows_string_to_utf8 str =
+  let str = recode str in
+
+  (* Windows strings include the final \0 so remove this if present. *)
+  let len = UTF8.length str in
+  if len > 0 && UChar.code (UTF8.get str (len-1)) = 0 then
+    String.sub str 0 (UTF8.last str)
+  else
+    str
+
+(* Best effort convert hive value to printable string. *)
+let rec printable_hivex_value ?split_long_lines t v =
+  let hex = reg_hex_of_string ?split_long_lines in
+  match t with
+  | Hivex.REG_NONE -> if v = "" then "" else hex v
+  | Hivex.REG_SZ ->
+      (try windows_string_to_utf8 v with _ -> hex v)
+  | Hivex.REG_EXPAND_SZ ->
+      (try windows_string_to_utf8 v with _ -> hex v)
+  | Hivex.REG_BINARY -> hex v
+  | Hivex.REG_DWORD ->
+      (bitmatch Bitstring.bitstring_of_string v with
+       | { i : 32 : littleendian } -> sprintf "%08lx" i
+       | { _ } -> hex v)
+  | Hivex.REG_DWORD_BIG_ENDIAN ->
+      (bitmatch Bitstring.bitstring_of_string v with
+       | { i : 32 : bigendian } -> sprintf "%08lx" i
+       | { _ } -> hex v)
+  | Hivex.REG_LINK -> hex v
+  | Hivex.REG_MULTI_SZ -> (* XXX should be better for this one *)
+      hex v
+  | Hivex.REG_RESOURCE_LIST -> hex v
+  | Hivex.REG_FULL_RESOURCE_DESCRIPTOR -> hex v
+  | Hivex.REG_RESOURCE_REQUIREMENTS_LIST -> hex v
+  | Hivex.REG_QWORD ->
+      (bitmatch Bitstring.bitstring_of_string v with
+       | { i : 64 : littleendian } -> sprintf "%016Lx" i
+       | { _ } -> hex v)
+  | Hivex.REG_UNKNOWN i32 -> hex v
+
+(* Convert binary data to a hex string.  This includes line breaks. *)
+and reg_hex_of_string ?(split_long_lines=false) v =
+  let vs = String.explode v in
+  let vs = List.mapi (
+    fun i c ->
+      sprintf "%s%02x"
+        (if split_long_lines && i mod 16 = 0 then "\n" else "")
+        (int_of_char c)
+  ) vs in
+  String.concat "," vs
+
+let local_file_exists filename =
+  try Unix.access filename [Unix.F_OK]; true
+  with Unix.Unix_error _ -> false