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baseRandom.ml
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baseRandom.ml
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(*
Copyright © 2011 MLstate
This file is part of OPA.
OPA is free software: you can redistribute it and/or modify it under the
terms of the GNU Affero General Public License, version 3, as published by
the Free Software Foundation.
OPA 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 Affero General Public License for
more details.
You should have received a copy of the GNU Affero General Public License
along with OPA. If not, see <http://www.gnu.org/licenses/>.
*)
(* CF mli *)
include Random
let ensure_init =
let random_self_init = ref false in
fun () -> if not !random_self_init then begin
random_self_init := true;
self_init ();
end
let max_int () = Nativeint.to_int (Random.nativeint (Nativeint.of_int max_int))
let max_int64 () = int64 Int64.max_int
let string len =
let s = String.create len in
for i = 0 to len - 1 do
s.[i] <- Char.chr (int 128);
done;
s
let abstract_string alphabet len =
let apha_len = String.length alphabet in
let s = String.create len in
for i = 0 to len - 1 do
let x = int apha_len in
s.[i] <- alphabet.[x];
done;
s
let alpha_string len =
abstract_string "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ" len