commit of galax mathql interpreter

[helm.git] / helm / ocaml / mathql_interpreter_galax / sortedby.ml

diff --git a/helm/ocaml/mathql_interpreter_galax/sortedby.ml b/helm/ocaml/mathql_interpreter_galax/sortedby.ml
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+(* Copyright (C) 2000, HELM Team.
+ * 
+ * This file is part of HELM, an Hypertextual, Electronic
+ * Library of Mathematics, developed at the Computer Science
+ * Department, University of Bologna, Italy.
+ * 
+ * HELM 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.
+ * 
+ * HELM 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 HELM; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA  02111-1307, USA.
+ * 
+ * For details, see the HELM World-Wide-Web page,
+ * http://www.cs.unibo.it/helm/.
+ *)
+
+(*
+ * implementazione del comando SORTEDBY
+ *)
+
+open MathQL;;
+open Func;;
+(*open Utility;;*)
+
+(*
+ * implementazione del comando SORTEDBY
+ *)
+let sortedby_ex alist order afunc =
+ let before = Unix.time () in
+  let res = 
+   let module S = Mathql_semantics in
+    (Sort.list
+     (fun {S.extra = e1} {S.extra = e2} ->
+      match order with
+         MQAsc  -> e1 < e2
+       | MQDesc -> e1 > e2
+     )
+     (List.map
+      (fun {S.uri = u ; S.attributes = attr} -> {S.uri = u ; S.attributes = attr ; S.extra = (apply_func afunc u)})
+      alist
+     )
+    )
+  in
+   let after = Unix.time ()
+   and ll1 = string_of_int (List.length alist) in
+    let diff = string_of_float (after -. before) in
+     prerr_endline
+      ("SORTEDBY(" ^ ll1 ^ ") = " ^ string_of_int (List.length res) ^
+       ": " ^ diff ^ "s") ;
+     flush stderr ;
+     res
+;;
+