X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fmatita%2FmatitaMisc.ml;h=e311973c9cc362c726d503839154c2efee644c0b;hb=97c2d258a5c524eb5c4b85208899d80751a2c82f;hp=1a55795a5536666d5c0adc993bdb5d1bcc1d7a13;hpb=5ee4e9d9fbff19b7937459c5ad4652542ac1ccb8;p=helm.git

diff --git a/helm/matita/matitaMisc.ml b/helm/matita/matitaMisc.ml
index 1a55795a5..e311973c9 100644
--- a/helm/matita/matitaMisc.ml
+++ b/helm/matita/matitaMisc.ml
@@ -1,4 +1,4 @@
-(* Copyright (C) 2004, HELM Team.
+(* Copyright (C) 2004-2005, HELM Team.
  * 
  * This file is part of HELM, an Hypertextual, Electronic
  * Library of Mathematics, developed at the Computer Science
@@ -24,18 +24,55 @@
  *)
 
 open Printf
+open MatitaTypes 
 
-let is_dir fname = (Unix.stat fname).Unix.st_kind = Unix.S_DIR
-let is_regular fname = (Unix.stat fname).Unix.st_kind = Unix.S_REG
+(** Functions "imported" from Http_getter_misc *)
 
-let input_file fname =
-  let size = (Unix.stat fname).Unix.st_size in
-  let buf = Buffer.create size in
-  let ic = open_in fname in
-  Buffer.add_channel buf ic size;
-  close_in ic;
-  Buffer.contents buf
+let strip_trailing_slash = Http_getter_misc.strip_trailing_slash
+let normalize_dir = Http_getter_misc.normalize_dir
+let strip_suffix = Http_getter_misc.strip_suffix
 
+let baseuri_of_baseuri_decl st =
+  match st with
+  | GrafiteAst.Executable (_, GrafiteAst.Command (_, GrafiteAst.Set (_, "baseuri", buri))) ->
+      Some buri
+  | _ -> None
+
+let is_empty buri =
+ List.for_all
+  (function
+      Http_getter_types.Ls_section _ -> true
+    | Http_getter_types.Ls_object _ -> false)
+  (Http_getter.ls (Http_getter_misc.strip_trailing_slash buri ^ "/"))
+
+let safe_remove fname = if Sys.file_exists fname then Sys.remove fname
+
+let is_dir_empty d =
+  try 
+    let od = Unix.opendir d in
+    try 
+      ignore (Unix.readdir od);
+      ignore (Unix.readdir od);
+      ignore (Unix.readdir od);
+      Unix.closedir od;
+      false
+    with End_of_file -> 
+      Unix.closedir od;
+      true
+  with Unix.Unix_error _ -> true
+
+let safe_rmdir d = try Unix.rmdir d with Unix.Unix_error _ -> ()
+
+let rec rmdir_descend d = 
+  if is_dir_empty d then
+    begin
+      safe_rmdir d;
+      rmdir_descend (Filename.dirname d)
+    end
+
+let absolute_path file =
+  if file.[0] = '/' then file else Unix.getcwd () ^ "/" ^ file
+  
 let is_proof_script fname = true  (** TODO Zack *)
 let is_proof_object fname = true  (** TODO Zack *)
 
@@ -45,7 +82,117 @@ let append_phrase_sep s =
   else
     s
 
-let strip_trailing_blanks =
-  let rex = Pcre.regexp "\\s*$" in
-  fun s -> Pcre.replace ~rex s
+exception History_failure
+
+type 'a memento = 'a array * int * int * int  (* data, hd, tl, cur *)
+
+class type ['a] history =
+  object
+    method add : 'a -> unit
+    method next : 'a
+    method previous : 'a
+    method load: 'a memento -> unit
+    method save: 'a memento
+    method is_begin: bool
+    method is_end: bool
+  end
+
+class basic_history (head, tail, cur) =
+  object
+    val mutable hd = head  (* insertion point *)
+    val mutable tl = tail (* oldest inserted item *)
+    val mutable cur = cur  (* current item for the history *)
+    
+    method is_begin = cur <= tl
+    method is_end = cur >= hd
+  end
+  
+  
+class shell_history size =
+  let size = size + 1 in
+  let decr x = let x' = x - 1 in if x' < 0 then size + x' else x' in
+  let incr x = (x + 1) mod size in
+  object (self)
+    val data = Array.create size ""
+
+    inherit basic_history (0, -1 , -1)
+    
+    method add s =
+      data.(hd) <- s;
+      if tl = -1 then tl <- hd;
+      hd <- incr hd;
+      if hd = tl then tl <- incr tl;
+      cur <- hd
+    method previous =
+      if cur = tl then raise History_failure;
+      cur <- decr cur;
+      data.(cur)
+    method next =
+      if cur = hd then raise History_failure;
+      cur <- incr cur;
+      if cur = hd then "" else data.(cur)
+    method load (data', hd', tl', cur') =
+      assert (Array.length data = Array.length data');
+      hd <- hd'; tl <- tl'; cur <- cur';
+      Array.blit data' 0 data 0 (Array.length data')
+    method save = (Array.copy data, hd, tl, cur)
+  end
+
+class ['a] browser_history ?memento size init =
+  object (self)
+    initializer match memento with Some m -> self#load m | _ -> ()
+    val data = Array.create size init
+
+    inherit basic_history (0, 0, 0)
+    
+    method previous =
+      if cur = tl then raise History_failure;
+      cur <- cur - 1;
+      if cur = ~-1 then cur <- size - 1;
+      data.(cur)
+    method next =
+      if cur = hd then raise History_failure;
+      cur <- cur + 1;
+      if cur = size then cur <- 0;
+      data.(cur)
+    method add (e:'a) =
+      if e <> data.(cur) then
+        begin
+          cur <- cur + 1;
+          if cur = size then cur <- 0;
+          if cur = tl then tl <- tl + 1;
+          if tl = size then tl <- 0;
+          hd <- cur;
+          data.(cur) <- e
+        end
+    method load (data', hd', tl', cur') =
+      assert (Array.length data = Array.length data');
+      hd <- hd'; tl <- tl'; cur <- cur';
+      Array.blit data' 0 data 0 (Array.length data')
+    method save = (Array.copy data, hd, tl, cur)
+  end
+
+let singleton f =
+  let instance = lazy (f ()) in
+  fun () -> Lazy.force instance
+
+let image_path n = sprintf "%s/%s" BuildTimeConf.images_dir n
+
+let end_ma_RE = Pcre.regexp "\\.ma$"
+
+let obj_file_of_baseuri baseuri =
+ let path =
+  Helm_registry.get "matita.basedir" ^ "/xml" ^
+   Pcre.replace ~pat:"^cic:" ~templ:"" baseuri
+ in
+  path ^ ".moo"
+
+let list_tl_at ?(equality=(==)) e l =
+  let rec aux =
+    function
+    | [] -> raise Not_found
+    | hd :: tl as l when equality hd e -> l
+    | hd :: tl -> aux tl
+  in
+  aux l