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|
(**************************************************************************************)
(* Copyright (C) 2009 Pietro Abate <pietro.abate@pps.jussieu.fr> *)
(* Copyright (C) 2009 Mancoosi Project *)
(* *)
(* This library is free software: you can redistribute it and/or modify *)
(* it under the terms of the GNU Lesser General Public License as *)
(* published by the Free Software Foundation, either version 3 of the *)
(* License, or (at your option) any later version. A special linking *)
(* exception to the GNU Lesser General Public License applies to this *)
(* library, see the COPYING file for more information. *)
(**************************************************************************************)
open ExtLib
include Util.Logging(struct let label = __FILE__ end) ;;
let gzip_open_file file =
IFDEF HASZIP THEN
let ch = Gzip.open_in file in
let input_char ch = try Gzip.input_char ch with End_of_file -> raise IO.No_more_input in
let read ch = try Gzip.input ch with End_of_file -> raise IO.No_more_input in
IO.create_in
~read:(fun () -> input_char ch)
~input:(read ch)
~close:(fun () -> Gzip.close_in ch)
ELSE
fatal "gzip not supported. re-configure with --with-zip"
END
;;
let bzip_open_file file =
IFDEF HASBZ2 THEN
(* workaround to avoid segfault :
* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=602170 *)
let _ = Bz2.version in
let s = " " in
let ch = Bz2.open_in (open_in file) in
let input_char ch =
try ignore (Bz2.read ch s 0 1) ; s.[0]
with End_of_file -> raise IO.No_more_input
in
let read ch s pos len =
try Bz2.read ch s pos len
with End_of_file -> raise IO.No_more_input
in
IO.create_in
~read:(fun () -> input_char ch)
~input:(read ch)
~close:(fun () -> Bz2.close_in ch)
ELSE
fatal "bzip not supported. re-configure with --with-bz2"
END
;;
let std_open_file file = IO.input_channel (open_in file)
let open_ch ch = IO.input_channel ch
let close_ch ch = IO.close_in ch
let open_file file =
if (Unix.stat file).Unix.st_size = 0 then fatal "Input file %s is empty" file;
let openfun = try
let ch = open_in file in
let openfun = match input_byte ch with
(* gzip magic is 0x1f 0x8b *)
| 0x1f -> (match input_byte ch with
| 0x8b -> gzip_open_file
| _ -> std_open_file)
(* bz2 magic is "BZh" *)
| 0x42 -> (match input_byte ch with
| 0x5a -> (match input_byte ch with
| 0x68 -> bzip_open_file
| _ -> std_open_file)
| _ -> std_open_file)
(* xz magic is 0xfd "7zXZ" *)
| 0xfd -> (match input_byte ch with
| 0x37 -> (match input_byte ch with
| 0x7a -> (match input_byte ch with
| 0x58 -> (match input_byte ch with
| 0x5a -> fatal "xz not supported."
| _ -> std_open_file)
| _ -> std_open_file)
| _ -> std_open_file)
| _ -> std_open_file)
| _ -> std_open_file
in
close_in ch;
openfun
with End_of_file -> std_open_file in
openfun file
;;
let parse_uri s =
let url = Url.of_string s in
let path = url.Url.path
in
(url.Url.scheme,(None,None,None,None,path),None)
let guess_format urilist =
match List.flatten urilist with
|uri::l ->
let (p_default,_,_) = parse_uri uri in
if List.for_all (fun u ->
let (p_list,_,_) = parse_uri u in
p_default = p_list
) l then p_default
else
fatal "The input list contains different format prefixes"
|_ -> fatal "Impossible to guess input format"
|
