(******************************************************************************)
(* ocaml-fileutils: files and filenames common operations *)
(* *)
(* Copyright (C) 2003-2014, Sylvain Le Gall *)
(* *)
(* This library is free software; you can redistribute it and/or modify it *)
(* under the terms of the GNU Lesser General Public License as published by *)
(* the Free Software Foundation; either version 2.1 of the License, or (at *)
(* your option) any later version, with the OCaml static compilation *)
(* exception. *)
(* *)
(* This library 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 file *)
(* COPYING for more details. *)
(* *)
(* You should have received a copy of the GNU Lesser General Public License *)
(* along with this library; if not, write to the Free Software Foundation, *)
(* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA *)
(******************************************************************************)
open FileUtilTypes
open FilePath
open FileUtilTEST
let cmp ?(skip1 = 0) fln1 ?(skip2 = 0) fln2 =
if (reduce fln1) = (reduce fln2) then
None
else if (test (And(Is_readable, Is_file)) fln1)
&& (test (And(Is_readable, Is_file)) fln2) then begin
let fd1 = open_in_bin fln1 in
let fd2 = open_in_bin fln2 in
let clean_fd () =
let () = try close_in fd1 with _ -> () in
let () = try close_in fd2 with _ -> () in
()
in
let test_empty st =
try
Stream.empty st;
true
with Stream.Failure ->
false
in
let _ = seek_in fd1 skip1 in
let _ = seek_in fd2 skip2 in
let stream1 = Stream.of_channel fd1 in
let stream2 = Stream.of_channel fd2 in
try
begin
while ((Stream.next stream1) = (Stream.next stream2)) do
()
done;
clean_fd ();
Some (Stream.count stream1)
end
with
| Stream.Failure ->
begin
match ((test_empty stream1), (test_empty stream2)) with
true, true ->
None
| true, false
| false, true
(* Don't know how this case could be... *)
| false, false ->
clean_fd ();
Some (Stream.count stream1)
end
| e ->
clean_fd ();
raise e
end else
Some (-1)