/usr/lib/ocaml/marshal.ml is in ocaml-nox 4.02.3-5ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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(* *)
(* OCaml *)
(* *)
(* Xavier Leroy, projet Cristal, INRIA Rocquencourt *)
(* *)
(* Copyright 1997 Institut National de Recherche en Informatique et *)
(* en Automatique. All rights reserved. This file is distributed *)
(* under the terms of the GNU Library General Public License, with *)
(* the special exception on linking described in file ../LICENSE. *)
(* *)
(***********************************************************************)
type extern_flags =
No_sharing
| Closures
| Compat_32
(* note: this type definition is used in 'byterun/debugger.c' *)
external to_channel: out_channel -> 'a -> extern_flags list -> unit
= "caml_output_value"
external to_bytes: 'a -> extern_flags list -> bytes
= "caml_output_value_to_string"
external to_string: 'a -> extern_flags list -> string
= "caml_output_value_to_string"
external to_buffer_unsafe:
bytes -> int -> int -> 'a -> extern_flags list -> int
= "caml_output_value_to_buffer"
let to_buffer buff ofs len v flags =
if ofs < 0 || len < 0 || ofs > Bytes.length buff - len
then invalid_arg "Marshal.to_buffer: substring out of bounds"
else to_buffer_unsafe buff ofs len v flags
(* The functions below use byte sequences as input, never using any
mutation. It makes sense to use non-mutated [bytes] rather than
[string], because we really work with sequences of bytes, not
a text representation.
*)
external from_channel: in_channel -> 'a = "caml_input_value"
external from_bytes_unsafe: bytes -> int -> 'a
= "caml_input_value_from_string"
external data_size_unsafe: bytes -> int -> int = "caml_marshal_data_size"
let header_size = 20
let data_size buff ofs =
if ofs < 0 || ofs > Bytes.length buff - header_size
then invalid_arg "Marshal.data_size"
else data_size_unsafe buff ofs
let total_size buff ofs = header_size + data_size buff ofs
let from_bytes buff ofs =
if ofs < 0 || ofs > Bytes.length buff - header_size
then invalid_arg "Marshal.from_bytes"
else begin
let len = data_size_unsafe buff ofs in
if ofs > Bytes.length buff - (header_size + len)
then invalid_arg "Marshal.from_bytes"
else from_bytes_unsafe buff ofs
end
let from_string buff ofs =
(* Bytes.unsafe_of_string is safe here, as the produced byte
sequence is never mutated *)
from_bytes (Bytes.unsafe_of_string buff) ofs
|