From 34b02ee2b293ff779eb1231b189ee38ea747c6ff Mon Sep 17 00:00:00 2001
From: Enrico Tassi <enrico.tassi@inria.fr>
Date: Wed, 1 Jun 2005 11:05:19 +0000
Subject: [PATCH] fixed classical non-C programmer misunderstooding of pointers

---
 helm/ocaml/urimanager/uriManager.ml | 39 ++++++++++++++++++++---------
 1 file changed, 27 insertions(+), 12 deletions(-)

diff --git a/helm/ocaml/urimanager/uriManager.ml b/helm/ocaml/urimanager/uriManager.ml
index a4d260485..0697fb73b 100644
--- a/helm/ocaml/urimanager/uriManager.ml
+++ b/helm/ocaml/urimanager/uriManager.ml
@@ -33,10 +33,9 @@
 type uri = string array;;
 
 let eq uri1 uri2 =
- uri1 == uri2
+  uri1 == uri2 
 ;;
 
-
 let string_of_uri uri =
   match  uri.(Array.length uri - 1) with
   | "" -> 
@@ -45,7 +44,6 @@ let string_of_uri uri =
       String.concat "#" 
         [ uri.(Array.length uri - 3); uri.(Array.length uri - 1) ]
 
-
 let name_of_uri uri = uri.(Array.length uri - 2);;
 let buri_of_uri uri = uri.(Array.length uri - 4);;
 let depth_of_uri uri = Array.length uri - 3;;
@@ -65,6 +63,24 @@ module SetOfStrings = Map.Make(OrderedStrings);;
 let set_of_uri = ref SetOfStrings.empty;;
 let set_of_prefixes = ref SetOfStrings.empty;;
 
+  
+(* hash conses an uri *)
+let add_to_uriset ?suri uri =
+  let lookup_suri suri =
+    try
+      SetOfStrings.find suri !set_of_uri
+    with Not_found -> assert false
+  in
+  let suri = 
+    match suri with 
+    | None -> string_of_uri uri
+    | Some suri -> suri 
+  in
+  if not(SetOfStrings.mem suri !set_of_uri) then
+    set_of_uri := SetOfStrings.add suri uri !set_of_uri;
+  lookup_suri suri  
+    
+
 (* similar to uri_of_string, but used for prefixes of uris *)
 let normalize prefix =
  try
@@ -116,17 +132,16 @@ let uri_of_string str =
    with
     Not_found ->
       let uri = Array.of_list (mk_prefixes base xpointer) in
-      set_of_uri := SetOfStrings.add str uri !set_of_uri ;
-      uri
+      add_to_uriset ~suri:str uri
 ;;
 
 let strip_xpointer uri =
   let stripped_uri = Array.copy uri in
   stripped_uri.(Array.length uri - 1) <- "";  (* reset xpointer field *)
-  let stripped_uri_str = string_of_uri stripped_uri in
-  set_of_uri := SetOfStrings.add stripped_uri_str stripped_uri !set_of_uri;
-  stripped_uri
+  let suri = string_of_uri stripped_uri in
+  add_to_uriset ~suri stripped_uri
 
+  
 let cicuri_of_uri uri =
  let completeuri = string_of_uri uri in
   let newcompleteuri = 
@@ -138,7 +153,7 @@ let cicuri_of_uri uri =
    else
     let newuri = Array.copy uri in
      newuri.(Array.length uri - 3) <- newcompleteuri ;
-     newuri
+     add_to_uriset newuri
 ;;
 
 let annuri_of_uri uri =
@@ -148,7 +163,7 @@ let annuri_of_uri uri =
   else
    let newuri = Array.copy uri in
     newuri.(Array.length uri - 3) <- completeuri ^ ".ann" ;
-    newuri
+    add_to_uriset newuri
 ;;
 
 let uri_is_annuri uri =
@@ -160,7 +175,7 @@ let bodyuri_of_uri uri =
   if Str.string_match (Str.regexp ".*\\.con$") (string_of_uri uri) 0 then
    let newuri = Array.copy uri in
     newuri.(Array.length uri - 3) <- struri ^ ".body" ;
-    Some newuri
+    Some (add_to_uriset newuri)
   else
    None
 ;;
@@ -169,7 +184,7 @@ let innertypesuri_of_uri uri =
  let cicuri = cicuri_of_uri uri in
   let newuri = Array.copy cicuri in
    newuri.(Array.length cicuri - 3) <- (string_of_uri cicuri) ^ ".types" ;
-   newuri
+   add_to_uriset newuri
 ;;
 
 type uriref = uri * (int list)
-- 
2.39.2