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|
(***********************************************************************)
(* *)
(* Objective Caml *)
(* *)
(* Damien Doligez, projet Para, 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. *)
(* *)
(***********************************************************************)
(* $Id$ *)
(* Weak array operations *)
type 'a t;;
external create: int -> 'a t = "weak_create";;
let length x = Obj.size(Obj.repr x) - 1;;
external set : 'a t -> int -> 'a option -> unit = "weak_set";;
external get: 'a t -> int -> 'a option = "weak_get";;
external check: 'a t -> int -> bool = "weak_check";;
let fill ar ofs len x =
if ofs < 0 || ofs + len > length ar
then raise (Invalid_argument "Weak.fill")
else begin
for i = ofs to (ofs + len - 1) do
set ar i x
done
end
;;
let blit ar1 of1 ar2 of2 len =
if of1 < 0 || of1 + len > length ar1 || of2 < 0 || of2 + len > length ar2
then raise (Invalid_argument "Weak.blit")
else begin
if of2 > of1 then begin
for i = 0 to len - 1 do
set ar2 (of2 + i) (get ar1 (of1 + i))
done
end else begin
for i = len - 1 downto 0 do
set ar2 (of2 + i) (get ar1 (of1 + i))
done
end
end
;;
|
