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(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * CNRS-Ecole Polytechnique-INRIA Futurs-Universite Paris Sud *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
(* $Id$ *)
let hobcnv = Array.init 256 (fun i -> Printf.sprintf "%.2x" i)
let bohcnv = Array.init 256 (fun i -> i -
(if 0x30 <= i then 0x30 else 0) -
(if 0x41 <= i then 0x7 else 0) -
(if 0x61 <= i then 0x20 else 0))
let hex_of_bin ch = hobcnv.(int_of_char ch)
let bin_of_hex s = bohcnv.(char_of_int s[0]) * 16 + bohcnv.(char_of_int s[1])
let send cout expr =
let mshl_expr = Marshal.to_string expr [] in
let payload = Buffer.create (String.length mshl_expr * 2) in
String.iter (fun c -> Buffer.add_string payload (hex_of_bin c)) mshl_expr;
Buffer.add_char payload '\n';
output_string cout (Buffer.contents payload);
flush cout
let receive cin =
let payload = input_line cin in
let mshl_expr_len = String.length payload / 2 in
let mshl_expr = Buffer.create mshl_expr_len in
let buf = String.create 2 in
for i = 0 to mshl_expr_len - 1 do
String.blit payload (2*i) buf 0 2;
Buffer.add_char mshl_expr (bin_of_hex buf)
done;
Marshal.from_string (Buffer.contents mshl_expr) 0
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