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(***********************************************************************)
(* *)
(* Objective Caml *)
(* *)
(* Pierre Weis, projet Cristal, INRIA Rocquencourt *)
(* *)
(* Copyright 2001 Institut National de Recherche en Informatique et *)
(* en Automatique. All rights reserved. This file is distributed *)
(* only by permission. *)
(* *)
(***********************************************************************)
(* Reverses the lines contained into a file.
Simple recursive version; reads the data from stdin.
Try for instance
reverse_stdin reverse_stdin.ml
*)
let reverse_stdin () =
let i = ref 0 in
let nlines = ref 100 in
let lines = ref (Array.make !nlines "") in
let ic = stdin in
let rec loop j =
let line = input_line ic in
if j >= !nlines then begin
nlines := 2 * !nlines;
lines := Array.append !lines !lines
end;
!lines.(j) <- line;
incr i;
loop (j + 1) in
try loop 0 with
| End_of_file ->
for j = !i - 1 downto 0 do print_endline !lines.(j) done
;;
if !Sys.interactive then () else reverse_stdin ();;
|
