(*****************************************************************************)
(*                                                                           *)
(* Open Source License                                                       *)
(* Copyright (c) 2022 TriliTech <contact@trili.tech>                         *)
(*                                                                           *)
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(* copy of this software and associated documentation files (the "Software"),*)
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(* in all copies or substantial portions of the Software.                    *)
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(* DEALINGS IN THE SOFTWARE.                                                 *)
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(*****************************************************************************)

open Api

let last_error () =
  let len = Functions.Wasmer.last_error_length () in
  let storage = Ctypes.CArray.make Ctypes.char len in
  let len = Functions.Wasmer.last_error (Ctypes.CArray.start storage) len in
  String.init len (Ctypes.CArray.get storage)

let check_null_ptr exn ptr =
  if Ctypes.is_null ptr then raise (exn (last_error ())) else ()