X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=components%2Fextlib%2FhExtlib.ml;h=d4572789ad55f39795d000fd09192e839cfee02f;hb=67cf4ce16c346991c8eda71576414f5c6324ab82;hp=cf43e15a03677cff942a0ece003cc85ab0ff972b;hpb=1afc33fa6997763d76e420cfdf9956208806b95c;p=helm.git

diff --git a/components/extlib/hExtlib.ml b/components/extlib/hExtlib.ml
index cf43e15a0..d4572789a 100644
--- a/components/extlib/hExtlib.ml
+++ b/components/extlib/hExtlib.ml
@@ -27,16 +27,20 @@
 
 (** PROFILING *)
 
-let profiling_enabled = ComponentsConf.profiling
+let profiling_enabled = false ;; (* ComponentsConf.profiling *)
 
 let something_profiled = ref false
 
 let _ = 
   if !something_profiled then
     at_exit 
-      (fun _ -> prerr_endline 
-        (Printf.sprintf "!! %-39s %6s %9s %9s %9s" 
-          "function" "#calls" "total" "max" "average"))
+      (fun _ -> 
+        prerr_endline 
+         (Printf.sprintf "!! %39s ---------- --------- --------- ---------" 
+           (String.make 39 '-'));
+        prerr_endline 
+         (Printf.sprintf "!! %-39s %10s %9s %9s %9s" 
+           "function" "#calls" "total" "max" "average"))
 
 let profiling_printings = ref (fun _ -> true)
 let set_profiling_printings f = profiling_printings := f
@@ -67,11 +71,11 @@ let profile ?(enable = true) s =
    in
    at_exit
     (fun () ->
-      if !profiling_printings s && !total <> 0. then
+      if !profiling_printings s && !calls <> 0 then
        begin
         something_profiled := true;
         prerr_endline
-         (Printf.sprintf "!! %-39s %6d %9.4f %9.4f %9.4f" 
+         (Printf.sprintf "!! %-39s %10d %9.4f %9.4f %9.4f" 
          s !calls !total !max (!total /. (float_of_int !calls)))
        end);
    { profile = profile }
@@ -131,6 +135,10 @@ let is_alphanum c = is_alpha c || is_digit c
 
 (** {2 List processing} *)
 
+let flatten_map f l =
+  List.flatten (List.map f l)
+;;
+
 let rec list_uniq ?(eq=(=)) = function 
   | [] -> []
   | h::[] -> [h]
@@ -145,6 +153,17 @@ let rec filter_map f =
       | None -> filter_map f tl
       | Some v -> v :: filter_map f tl)
 
+let list_rev_map_filter f l =
+   let rec aux a = function
+      | []       -> a
+      | hd :: tl -> 
+         begin match f hd with
+	    | None   -> aux a tl
+	    | Some b -> aux (b :: a) tl 
+         end
+   in 
+   aux [] l
+
 let list_concat ?(sep = []) =
   let rec aux acc =
     function
@@ -164,6 +183,19 @@ let rec list_findopt f l =
   in
   aux l
 
+let split_nth n l =
+  let rec aux acc n l =
+    match n, l with
+    | 0, _ -> List.rev acc, l
+    | n, [] -> raise (Failure "HExtlib.split_nth")
+    | n, hd :: tl -> aux (hd :: acc) (n - 1) tl in
+  aux [] n l
+
+let list_last l =
+  let l = List.rev l in 
+  try List.hd l with exn -> raise (Failure "HExtlib.list_last")
+;;
+  
 (** {2 File predicates} *)
 
 let is_dir fname =
@@ -306,13 +338,16 @@ let find ?(test = fun _ -> true) path =
 let safe_remove fname = if Sys.file_exists fname then Sys.remove fname
 
 let is_dir_empty d =
- let od = Unix.opendir d in
- let rec aux () =
-  let name = Unix.readdir od in
-  if name <> "." && name <> ".." then false else aux () in
- let res = try aux () with End_of_file -> true in
-  Unix.closedir od;
-  res
+ try
+  let od = Unix.opendir d in
+  let rec aux () =
+   let name = Unix.readdir od in
+   if name <> "." && name <> ".." then false else aux () in
+  let res = try aux () with End_of_file -> true in
+   Unix.closedir od;
+   res
+ with
+  Unix.Unix_error _ -> true (* raised by Unix.opendir, we hope :-) *)
 
 let safe_rmdir d = try Unix.rmdir d with Unix.Unix_error _ -> ()
 
@@ -361,3 +396,7 @@ let raise_localized_exception ~offset floc exn =
    { flocb with Lexing.pos_cnum = x }, { floce with Lexing.pos_cnum = y }
  in
   raise (Localized (floc, exn))
+
+let estimate_size x = 
+  4 * (String.length (Marshal.to_string x [])) / 1024
+