ext_io.ml

(* Copyright (C) 2015-2016 Bloomberg Finance L.P.
 * 
 * This program 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 3 of the License, or
 * (at your option) any later version.
 *
 * In addition to the permissions granted to you by the LGPL, you may combine
 * or link a "work that uses the Library" with a publicly distributed version
 * of this file to produce a combined library or application, then distribute
 * that combined work under the terms of your choosing, with no requirement
 * to comply with the obligations normally placed on you by section 4 of the
 * LGPL version 3 (or the corresponding section of a later version of the LGPL
 * should you choose to use a 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 Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *)

(** on 32 bit , there are 16M limitation *)
let load_file f =
  Ext_pervasives.finally (open_in_bin f) ~clean:close_in (fun ic ->
      let n = in_channel_length ic in
      let s = Bytes.create n in
      really_input ic s 0 n;
      Bytes.unsafe_to_string s)

let rev_lines_of_chann chan =
  let rec loop acc chan =
    match input_line chan with
    | line -> loop (line :: acc) chan
    | exception End_of_file ->
        close_in chan;
        acc
  in
  loop [] chan

let rev_lines_of_file file =
  Ext_pervasives.finally ~clean:close_in (open_in_bin file) rev_lines_of_chann

let write_file f content =
  Ext_pervasives.finally ~clean:close_out (open_out_bin f) (fun oc ->
      output_string oc content)