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(***************************************************************************
* Copyright (C) 2004 by Thomas Nagy *
* tnagy2^8@yahoo.fr *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any 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 General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************)
open Facile;;
open Easy;;
open Datastruct;;
let solve (eq : eqtable) =
let nb_molecules = eq#getsize_j () and nb_elements = eq#getsize_i () in
let dist = Fd.array nb_molecules 1 900 in
(* trivial constraints on domains *)
for j = 0 to nb_molecules -1 do
let num = try int_of_string (eq#getvar j) with _ -> -1 in
if num > -1 then dist.(j) <- Fd.int num
done;
(* raises an exception if the problem is not solvable *)
for i = 0 to nb_elements - 1 do
Cstr.post (Arith.scalprod_fd (eq#getline i) dist =~ i2e 0)
done;
let goal = Goals.GlArray.labeling dist in
if (Goals.solve goal) then Array.iteri (fun cnt i -> eq#setsol cnt (Fd.min i)) dist
else failwith "no solution found"
;;
(* workaround for (probably) a bug in the facile library 1.0 (fixed in 1.1?) :
* when the constraints make a problem
* unsolvable, an exception is raised
*
* unfortunately the next problem
* solved afterwards is not handled properly *)
let cleanup (eq : eqtable) =
(* Printf.printf "cleaning up"; *)
let nb_molecules = eq#getsize_j () and nb_elements = eq#getsize_i () in
let dist = Fd.array nb_molecules 0 2 in
let goal = Goals.GlArray.labeling dist in
if not (Goals.solve goal) then failwith "fatal error"
;;
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