From c7d38c2afdf1319a34f3faa4696faace06dbd490 Mon Sep 17 00:00:00 2001
From: Enrico Tassi <enrico.tassi@inria.fr>
Date: Fri, 1 Jul 2005 10:03:11 +0000
Subject: [PATCH] uri_of_string now checks the uri is well formed

---
 helm/ocaml/urimanager/uriManager.ml | 57 +++++++++++++++++++++++------
 1 file changed, 45 insertions(+), 12 deletions(-)

diff --git a/helm/ocaml/urimanager/uriManager.ml b/helm/ocaml/urimanager/uriManager.ml
index b8da7d91e..296701af5 100644
--- a/helm/ocaml/urimanager/uriManager.ml
+++ b/helm/ocaml/urimanager/uriManager.ml
@@ -77,16 +77,57 @@ module MapStringsToUri = Map.Make(OrderedStrings);;
  *)
 let set_of_uri = ref MapStringsToUri.empty;;
 
+exception IllFormedUri of string;;
+
+let _dottypes = ".types"
+let _types = "types",5
+let _ann = "ann",3
+let _dotann = ".ann"
+let _var = "var",3
+let _dotbody = ".body"
+let _con = "con",3
+let _xpointer = "#xpointer(1/"
+let _con3 = "con"
+let _var3 = "var"
+let _ind3 = "ind"
+let _ann3 = "ann"
+let _types5 = "types"
+let _xpointer8 = "xpointer"
+let _cic5 = "cic:/"
+
+let is_malformed suri =
+  try 
+    if String.sub suri 0 5 <> _cic5 then true
+    else
+      let len = String.length suri - 5 in
+      let last5 = String.sub suri len 5 in
+      let last3 = String.sub last5 2 3 in
+      if last3 = _con3 || last3 = _var3 || last3 = _ind3 || 
+         last3 = _ann3 || last5 = _types5 || last5 = _dotbody then 
+           false
+      else 
+        try
+          let index = String.rindex suri '#' + 1 in
+          let xptr = String.sub suri index 8 in
+          if xptr = _xpointer8 then
+            false
+          else
+            true
+        with Not_found -> true
+  with Invalid_argument _ -> true
+    
 (* hash conses an uri *)
 let uri_of_string suri =
   try
     MapStringsToUri.find suri !set_of_uri
   with Not_found -> 
-    let new_uri = suri, fresh_id () in
-    set_of_uri := MapStringsToUri.add suri new_uri !set_of_uri;
-    new_uri
+    if is_malformed suri then
+      raise (IllFormedUri suri) 
+    else
+      let new_uri = suri, fresh_id () in
+      set_of_uri := MapStringsToUri.add suri new_uri !set_of_uri;
+      new_uri
 
-exception IllFormedUri of string;;
 
 let strip_xpointer ((uri,_) as olduri) =
   try 
@@ -115,14 +156,6 @@ let has_suffix uri (pat,n) =
   with
     Not_found -> assert false
 
-let _dottypes = ".types"
-let _types = "types",5
-let _ann = "ann",3
-let _dotann = ".ann"
-let _var = "var",3
-let _dotbody = ".body"
-let _con = "con",3
-let _xpointer = "#xpointer(1/"
  
 let cicuri_of_uri (uri, _) = uri_of_string (clear_suffix uri ~pat2:_types _ann)
 
-- 
2.39.2