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|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * CNRS-Ecole Polytechnique-INRIA Futurs-Universite Paris Sud *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
(* $Id$ *)
open Pp
open Util
open Unix
(* Expanding shell variables and home-directories *)
let safe_getenv_def var def =
try
Sys.getenv var
with Not_found ->
warning ("Environment variable "^var^" not found: using '"^def^"' .");
flush Pervasives.stdout;
def
let home = (safe_getenv_def "HOME" ".")
let safe_getenv n = safe_getenv_def n ("$"^n)
let rec expand_atom s i =
let l = String.length s in
if i<l && (is_digit s.[i] or is_letter s.[i] or s.[i] = '_')
then expand_atom s (i+1)
else i
let rec expand_macros s i =
let l = String.length s in
if i=l then s else
match s.[i] with
| '$' ->
let n = expand_atom s (i+1) in
let v = safe_getenv (String.sub s (i+1) (n-i-1)) in
let s = (String.sub s 0 i)^v^(String.sub s n (l-n)) in
expand_macros s (i + String.length v)
| '~' ->
let n = expand_atom s (i+1) in
let v =
if n=i+1 then home
else (getpwnam (String.sub s (i+1) (n-i-1))).pw_dir
in
let s = v^(String.sub s n (l-n)) in
expand_macros s (String.length v)
| c -> expand_macros s (i+1)
let glob s = expand_macros s 0
(* Files and load path. *)
type physical_path = string
type load_path = physical_path list
(* All subdirectories, recursively *)
let exists_dir dir =
try let _ = opendir dir in true with Unix_error _ -> false
let all_subdirs ~unix_path:root =
let l = ref [] in
let add f rel = l := (f, rel) :: !l in
let rec traverse dir rel =
let dirh = opendir dir in
try
while true do
let f = readdir dirh in
if f <> "" && f.[0] <> '.' && (not Coq_config.local or (f <> "CVS"))
then
let file = Filename.concat dir f in
try
if (stat file).st_kind = S_DIR then begin
let newrel = rel@[f] in
add file newrel;
traverse file newrel
end
with Unix_error (e,s1,s2) -> ()
done
with End_of_file ->
closedir dirh
in
if exists_dir root then
begin
add root [];
traverse root []
end ;
List.rev !l
let search_in_path path filename =
let rec search = function
| lpe :: rem ->
let f = glob (Filename.concat lpe filename) in
if Sys.file_exists f then (lpe,f) else search rem
| [] ->
raise Not_found
in
search path
let where_in_path = search_in_path
let find_file_in_path paths name =
let globname = glob name in
if not (Filename.is_implicit globname) then
let root = Filename.dirname globname in
root, globname
else
try
search_in_path paths name
with Not_found ->
errorlabstrm "System.find_file_in_path"
(hov 0 (str "Can't find file" ++ spc () ++ str name ++ spc () ++
str "on loadpath"))
let is_in_path lpath filename =
try
let _ = search_in_path lpath filename in true
with
Not_found -> false
let make_suffix name suffix =
if Filename.check_suffix name suffix then name else (name ^ suffix)
let file_readable_p na =
try access (glob na) [R_OK];true with Unix_error (_, _, _) -> false
let open_trapping_failure open_fun name suffix =
let rname = glob (make_suffix name suffix) in
try open_fun rname with _ -> error ("Can't open " ^ rname)
let try_remove f =
try Sys.remove f
with _ -> msgnl (str"Warning: " ++ str"Could not remove file " ++
str f ++ str" which is corrupted!" )
let marshal_out ch v = Marshal.to_channel ch v []
let marshal_in ch =
try Marshal.from_channel ch
with End_of_file -> error "corrupted file: reached end of file"
exception Bad_magic_number of string
let raw_extern_intern magic suffix =
let extern_state name =
let (_,channel) as filec =
open_trapping_failure (fun n -> n,open_out_bin n) name suffix in
output_binary_int channel magic;
filec
and intern_state fname =
let channel = open_in_bin fname in
if input_binary_int channel <> magic then
raise (Bad_magic_number fname);
channel
in
(extern_state,intern_state)
let extern_intern magic suffix =
let (raw_extern,raw_intern) = raw_extern_intern magic suffix in
let extern_state name val_0 =
try
let (fname,channel) = raw_extern name in
try
marshal_out channel val_0;
close_out channel
with e ->
begin try_remove fname; raise e end
with Sys_error s -> error ("System error: " ^ s)
and intern_state paths name =
try
let _,fname = find_file_in_path paths (make_suffix name suffix) in
let channel = raw_intern fname in
let v = marshal_in channel in
close_in channel;
v
with Sys_error s ->
error("System error: " ^ s)
in
(extern_state,intern_state)
(* Time stamps. *)
type time = float * float * float
let process_time () =
let t = times () in
(t.tms_utime, t.tms_stime)
let get_time () =
let t = times () in
(time(), t.tms_utime, t.tms_stime)
let time_difference (t1,_,_) (t2,_,_) = t2 -. t1
let fmt_time_difference (startreal,ustart,sstart) (stopreal,ustop,sstop) =
real (stopreal -. startreal) ++ str " secs " ++
str "(" ++
real ((-.) ustop ustart) ++ str "u" ++
str "," ++
real ((-.) sstop sstart) ++ str "s" ++
str ")"
|
