X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=components%2Fextlib%2FhExtlib.ml;h=c0364315a62c018923f2c9e76873a35087c15fd2;hb=2499f5fdcf4dbfecc6f4fafe925b24ae76f14be8;hp=4296db49b668acde2ee35efc2aa87e0fe9f2018c;hpb=859dbc6f3766828d1f7a4c5d794a98dca5381274;p=helm.git

diff --git a/components/extlib/hExtlib.ml b/components/extlib/hExtlib.ml
index 4296db49b..c0364315a 100644
--- a/components/extlib/hExtlib.ml
+++ b/components/extlib/hExtlib.ml
@@ -27,39 +27,60 @@
 
 (** PROFILING *)
 
-let profiling_enabled = ComponentsConf.profiling
-
-let profiling_printings = ref (fun () -> true)
+let profiling_enabled = false ;; (* ComponentsConf.profiling *)
+
+let something_profiled = ref false
+
+let _ = 
+  if !something_profiled then
+    at_exit 
+      (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
 
 type profiler = { profile : 'a 'b. ('a -> 'b) -> 'a -> 'b }
-let profile ?(enable = true) =
+let profile ?(enable = true) s =
  if profiling_enabled && enable then
-  function s ->
    let total = ref 0.0 in
    let calls = ref 0 in
+   let max = ref 0.0 in
    let profile f x =
     let before = Unix.gettimeofday () in
     try
      incr calls;
      let res = f x in
      let after = Unix.gettimeofday () in
-      total := !total +. (after -. before);
+     let delta = after -. before in
+      total := !total +. delta;
+      if delta > !max then max := delta;
       res
     with
      exc ->
       let after = Unix.gettimeofday () in
-       total := !total +. (after -. before);
+      let delta = after -. before in
+       total := !total +. delta;
+       if delta > !max then max := delta;
        raise exc
    in
    at_exit
     (fun () ->
-      if !profiling_printings () && !total <> 0. then
+      if !profiling_printings s && !calls <> 0 then
+       begin
+        something_profiled := true;
         prerr_endline
-         ("!! TOTAL TIME SPENT IN " ^ s ^ " ("^string_of_int !calls^"): " ^ string_of_float !total));
+         (Printf.sprintf "!! %-39s %10d %9.4f %9.4f %9.4f" 
+         s !calls !total !max (!total /. (float_of_int !calls)))
+       end);
    { profile = profile }
  else
-  function _ -> { profile = fun f x -> f x }
+   { profile = fun f x -> f x }
 
 (** {2 Optional values} *)
 
@@ -114,6 +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]
@@ -147,6 +172,19 @@ 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 =
@@ -289,13 +327,16 @@ 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 _ -> ()
 
@@ -344,3 +385,7 @@ 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
+