From ea3883261d74eda2451ab90efc354a9c03b48707 Mon Sep 17 00:00:00 2001
From: Claudio Sacerdoti Coen <claudio.sacerdoticoen@unibo.it>
Date: Fri, 19 Jun 2009 14:05:18 +0000
Subject: [PATCH] Persistent db (to lookup names in the library) inefficiently
 implemented as an associative list which is:

 1) loaded from disk and stored in memory when matita starts
 2) updated every time a file is saved

Still to be implemented: decompilation.
---
 .../components/ng_kernel/nCicLibrary.ml       | 36 ++++++++++++++-----
 .../components/ng_kernel/nCicLibrary.mli      |  2 ++
 helm/software/matita/matitaInit.ml            |  7 ++--
 3 files changed, 33 insertions(+), 12 deletions(-)

diff --git a/helm/software/components/ng_kernel/nCicLibrary.ml b/helm/software/components/ng_kernel/nCicLibrary.ml
index 18b7903e5..984b7ef68 100644
--- a/helm/software/components/ng_kernel/nCicLibrary.ml
+++ b/helm/software/components/ng_kernel/nCicLibrary.ml
@@ -20,7 +20,8 @@ type timestamp =
 
 let time0 = [],[],NUri.UriMap.empty;;
 let storage = ref [];;
-let aliases = ref [];;
+let local_aliases = ref [];;
+let global_aliases = ref [];;
 let cache = ref NUri.UriMap.empty;;
 
 class status =
@@ -35,7 +36,7 @@ class status =
 
 let time_travel status =
  let sto,ali,cac = status#timestamp in
-  storage := sto; aliases := ali; cache := cac
+  storage := sto; local_aliases := ali; cache := cac
 ;;
 
 let path_of_baseuri ?(no_suffix=false) baseuri =
@@ -52,8 +53,8 @@ let path_of_baseuri ?(no_suffix=false) baseuri =
 
 let magic = 0;;
 
-let require0 ~baseuri =
- let ch = open_in (path_of_baseuri baseuri) in
+let require_path path =
+ let ch = open_in path in
  let mmagic,dump = Marshal.from_channel ch in
   close_in ch;
   if mmagic <> magic then
@@ -62,9 +63,20 @@ let require0 ~baseuri =
    dump
 ;;
 
+let require0 ~baseuri = require_path (path_of_baseuri baseuri);;
+
+let db_path () = Helm_registry.get "matita.basedir" ^ "/ng_db.ng";;
+
+let init () =
+ try
+  global_aliases := require_path (db_path ())
+ with
+  Sys_error _ -> ()
+;;
+
 let serialize ~baseuri dump =
  let ch = open_out (path_of_baseuri baseuri) in
- Marshal.to_channel ch (magic,dump) [Marshal.Closures];
+ Marshal.to_channel ch (magic,dump) [];
  close_out ch;
  List.iter
   (fun (uri,obj) ->
@@ -72,6 +84,10 @@ let serialize ~baseuri dump =
     Marshal.to_channel ch (magic,obj) [];
     close_out ch
   ) !storage;
+ global_aliases := !local_aliases @ !global_aliases;
+ let ch = open_out (db_path ()) in
+ Marshal.to_channel ch (magic,!global_aliases) [];
+ close_out ch;
  time_travel (new status)
 ;;
 
@@ -159,7 +175,8 @@ let fetch_obj uri =
 let resolve name =
  try
   HExtlib.filter_map
-   (fun (_,name',nref) -> if name'=name then Some nref else None) !aliases
+   (fun (_,name',nref) -> if name'=name then Some nref else None)
+   (!local_aliases @ !global_aliases)
  with
   Not_found -> raise (NCicEnvironment.ObjectNotFound (lazy name))
 ;;
@@ -167,7 +184,8 @@ let resolve name =
 let aliases_of uri =
  try
   HExtlib.filter_map
-   (fun (uri',_,nref) -> if NUri.eq uri' uri then Some nref else None) !aliases
+   (fun (uri',_,nref) ->
+     if NUri.eq uri' uri then Some nref else None) !local_aliases
  with
   Not_found -> raise (NCicEnvironment.ObjectNotFound (lazy (NUri.string_of_uri uri)))
 ;;
@@ -202,8 +220,8 @@ let add_obj status u obj =
               (NReference.Ind (inductive,i,leftno))]
          ) il)
   in
-  aliases := references @ !aliases;
-  status#set_timestamp (!storage,!aliases,!cache)
+  local_aliases := references @ !local_aliases;
+  status#set_timestamp (!storage,!local_aliases,!cache)
 ;;
 
 let get_obj u =
diff --git a/helm/software/components/ng_kernel/nCicLibrary.mli b/helm/software/components/ng_kernel/nCicLibrary.mli
index a8b546d2e..326ef143e 100644
--- a/helm/software/components/ng_kernel/nCicLibrary.mli
+++ b/helm/software/components/ng_kernel/nCicLibrary.mli
@@ -47,4 +47,6 @@ module type Serializer =
 
 module Serializer(S: sig type status end): Serializer with type status= S.status
 
+val init: unit -> unit
+
 (* EOF *)
diff --git a/helm/software/matita/matitaInit.ml b/helm/software/matita/matitaInit.ml
index aee55d60d..72792a56d 100644
--- a/helm/software/matita/matitaInit.ml
+++ b/helm/software/matita/matitaInit.ml
@@ -25,10 +25,10 @@
 
 (* $Id$ *)
 
-type thingsToInitilaize = 
+type thingsToInitialize = 
   ConfigurationFile | Db | Environment | Getter | CmdLine | Registry
   
-exception FailedToInitialize of thingsToInitilaize
+exception FailedToInitialize of thingsToInitialize
 
 let wants s l = 
   List.iter (
@@ -275,7 +275,8 @@ let other_components =
 let initialize_all () =
   status := 
     List.fold_left (fun s f -> f s) !status
-    (conf_components @ other_components)
+    (conf_components @ other_components);
+  NCicLibrary.init ()
 
 let parse_cmdline_and_configuration_file () =
   status := List.fold_left (fun s f -> f s) !status conf_components
-- 
2.39.2