log facility, initial environment for basic_rg

[helm.git] / helm / software / lambda-delta / basic_rg / brgEnvironment.ml

diff --git a/helm/software/lambda-delta/basic_rg/brgEnvironment.ml b/helm/software/lambda-delta/basic_rg/brgEnvironment.ml
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+(*
+    ||M||  This file is part of HELM, an Hypertextual, Electronic        
+    ||A||  Library of Mathematics, developed at the Computer Science     
+    ||T||  Department, University of Bologna, Italy.                     
+    ||I||                                                                
+    ||T||  HELM is free software; you can redistribute it and/or         
+    ||A||  modify it under the terms of the GNU General Public License   
+    \   /  version 2 or (at your option) any later version.              
+     \ /   This software is distributed as is, NO WARRANTY.              
+      V_______________________________________________________________ *)
+
+module U = NUri
+module H = U.UriHash
+module B = Brg
+
+exception ObjectNotFound of string Lazy.t
+
+let hsize = 7000 
+let env = H.create hsize
+
+(* Internal functions *******************************************************)
+
+(* Interface functions ******************************************************)
+
+let set_obj f obj uri =
+   H.add env uri obj; f obj uri
+   
+let get_obj f uri =
+   try f (H.find env uri) uri
+   with Not_found -> raise (ObjectNotFound (lazy (U.string_of_uri uri)))