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diff --git a/helm/ocaml/cic_proof_checking/cicLogger.ml b/helm/ocaml/cic_proof_checking/cicLogger.ml
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+++ b/helm/ocaml/cic_proof_checking/cicLogger.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://cs.unibo.it/helm/.
+ *)
+
+(* $Id$ *)
+
+type msg =
+ [ `Start_type_checking of UriManager.uri
+ | `Type_checking_completed of UriManager.uri
+ | `Trusting of UriManager.uri
+ ]
+
+let log ?(level = 1) =
+ let module U = UriManager in
+    function
+     | `Start_type_checking uri ->
+         HelmLogger.log (`Msg (`DIV (level, None, `T
+          ("Type-Checking of " ^ (U.string_of_uri uri) ^ " started"))))
+     | `Type_checking_completed uri ->
+         HelmLogger.log (`Msg (`DIV (level, Some "green", `T
+          ("Type-Checking of " ^ (U.string_of_uri uri) ^ " completed"))))
+     | `Trusting uri ->
+         HelmLogger.log (`Msg (`DIV (level, Some "blue", `T
+          ((U.string_of_uri uri) ^ " is trusted."))))
+
+class logger =
+  object
+    val mutable level = 0 (* indentation level *)
+    method log (msg: msg) =
+      match msg with
+      | `Start_type_checking _ ->
+          level <- level + 1;
+          log ~level msg
+      | `Type_checking_completed _ ->
+          log ~level msg;
+          level <- level - 1;
+      | _ -> log ~level msg
+  end
+
+let log msg = log ~level:1 msg
+