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(* Copyright (C) 2010 Pierre Chambart *)
(* 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 2 of *)
(* the License, or (at your option) any later version. *)
(* As a special exception to the GNU Library General Public License, you *)
(* may link, statically or dynamically, a "work that uses this library" *)
(* with a publicly distributed version of this library to produce an *)
(* executable file containing portions of this library, and distribute *)
(* that executable file under terms of your choice, without any of the *)
(* additional requirements listed in clause 6 of the GNU Library General *)
(* Public License. By "a publicly distributed version of this library", *)
(* we mean either the unmodified Library as distributed by the authors, *)
(* or a modified version of this library that is distributed under the *)
(* conditions defined in clause 3 of the GNU Library General Public *)
(* License. This exception does not however invalidate any other reasons *)
(* why the executable file might be covered by the GNU Library General *)
(* Public License . *)
(* This library is distributed in the hope that it will be useful, *)
(* but WITHOUT ANY WARRANTY; without even the implied warranty of *)
(* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *)
(* Lesser General Public License for more details. *)
(* You should have received a copy of the GNU Lesser General Public *)
(* License along with this library; if not, write to the Free Software *)
(* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *)
(* USA *)
(* You can contact the authour by sending email to *)
(* yori@users.sourceforge.net *)
open StringPrep_data
module type Type =
sig
type text
exception Prohibited of UChar.t
exception Bad_bidi
type profile =
[ `Nameprep (** RFC 3491 *)
| `Nodeprep (** RFC 3920, Appendix A *)
| `Resourceprep (** RFC 3920, Appendix B *)
| `Saslprep (** RFC 4013 *)
| `Trace (** for SASL Anonymous, RFC 4505, Section 3 *)
| `Iscsi (** RFC 3722 *)
| `Mib (** RFC 4011 *) ]
val stringprep : profile -> text -> text
end
module Make (Config : ConfigInt.Type) (Text : UnicodeString.Type) :
Type with type text = Text.t
=
struct
module UNF = UNF.Make ( Config ) ( Text )
module UCharInfo = UCharInfo.Make ( Config )
module StringPrep_data = StringPrep_data.Make ( Config )
open StringPrep_data
type text = Text.t
exception Prohibited of UChar.t
exception Bad_bidi
type normalisation =
[ `C
| `KC
| `D
| `KD
| `No ]
type profile =
[ `Nameprep (** RFC 3491 *)
| `Nodeprep (** RFC 3920, Appendix A *)
| `Resourceprep (** RFC 3920, Appendix B *)
| `Saslprep (** RFC 4013 *)
| `Trace (** for SASL Anonymous, RFC 4505, Section 3 *)
| `Iscsi (** RFC 3722 *)
| `Mib (** RFC 4011 *) ]
type internal_profile =
{ map : UChar.t -> UChar.t list;
normalize : normalisation;
prohibited : UChar.t -> bool;
check_bidi : bool;
unicode_version : UCharInfo.version_type;
bidi_ral : UChar.t -> bool;
bidi_l : UChar.t -> bool; }
let make_map map =
let f x =
let m = MappingMap.get map x in
mapping_to_list x m
in
f
let make_set set =
let f x = UCharTbl.Bool.get set x in
f
let nodeprep () =
{ map = make_map (map_b1b2 ());
normalize = `KC;
prohibited = make_set (nodeprep_prohibited ());
check_bidi = true;
unicode_version = `v3_2;
bidi_ral = make_set (d1 ());
bidi_l = make_set (d2 ()) }
let resourceprep () =
{ map = make_map (map_b1 ());
normalize = `KC;
prohibited = make_set (resourceprep_prohibited ());
check_bidi = true;
unicode_version = `v3_2;
bidi_ral = make_set (d1 ());
bidi_l = make_set (d2 ()) }
let nameprep () =
{ map = make_map (map_b1b2 ());
normalize = `KC;
prohibited = make_set (nameprep_prohibited ());
check_bidi = true;
unicode_version = `v3_2;
bidi_ral = make_set (d1 ());
bidi_l = make_set (d2 ()) }
let saslprep () =
{ map = make_map (saslprep_map ());
normalize = `KC;
prohibited = make_set (saslprep_prohibited ());
check_bidi = true;
unicode_version = `v3_2;
bidi_ral = make_set (d1 ());
bidi_l = make_set (d2 ()) }
let trace () =
{ map = (fun x -> [x]);
normalize = `No;
prohibited = make_set (trace_prohibited ());
check_bidi = true;
unicode_version = `v3_2;
bidi_ral = make_set (d1 ());
bidi_l = make_set (d2 ()) }
let iscsi () =
{ map = make_map (map_b1b2 ());
normalize = `KC;
prohibited = make_set (iscsi_prohibited ());
check_bidi = true;
unicode_version = `v3_2;
bidi_ral = make_set (d1 ());
bidi_l = make_set (d2 ()) }
(** rfc 4011 *)
let mib () =
{ map = make_map (map_b1 ());
normalize = `KC;
prohibited = make_set (mib_prohibited ());
check_bidi = false;
unicode_version = `v3_2;
bidi_ral = (fun x -> false);
bidi_l = (fun x -> false) }
let to_internal_profile : profile -> unit -> internal_profile = function
| `Nameprep -> nameprep
| `Nodeprep -> nodeprep
| `Resourceprep -> resourceprep
| `Saslprep -> saslprep
| `Trace -> trace
| `Iscsi -> iscsi
| `Mib -> mib
let is_correct_bidi profile text =
let is_rand_al_cat index = profile.bidi_ral (Text.look text index) in
let is_lcat index = profile.bidi_l (Text.look text index) in
let rec check_rand_al_cat index =
let next = Text.next text index in
if Text.out_of_range text next
then is_rand_al_cat index
else
if is_lcat index
then false
else check_rand_al_cat next
in
let rec check_not_rand_al_cat index =
if is_rand_al_cat index
then false
else
let next = Text.next text index in
if Text.out_of_range text next
then true
else check_not_rand_al_cat next
in
let first = Text.first text in
if Text.out_of_range text first
then (* empty text *) true
else
if is_rand_al_cat first
then check_rand_al_cat first
else check_not_rand_al_cat first
let normalisation : normalisation -> text -> text = function
| `C -> UNF.nfc
| `KC -> UNF.nfkc
| `D -> UNF.nfd
| `KD -> UNF.nfkd
| `No -> ( fun x -> x )
let stringprep profile text =
let profile = to_internal_profile profile () in
let buffer = Text.Buf.create 10 in
let add_char = Text.Buf.add_char buffer in
let map c = List.iter add_char (profile.map c) in
Text.iter map text;
let text = Text.Buf.contents buffer in
Text.Buf.clear buffer;
let text = normalisation profile.normalize text in
let rec check_prohibited index =
if Text.out_of_range text index
then ()
else begin
let char = (Text.look text index) in
let prohibited =
(not (UCharInfo.older (UCharInfo.age char) profile.unicode_version))
|| ( profile.prohibited char )
in
if prohibited
then raise (Prohibited (Text.look text index))
else check_prohibited (Text.next text index)
end
in
check_prohibited (Text.first text);
if profile.check_bidi
then begin
if is_correct_bidi profile text
then text
else raise Bad_bidi
end
else text
end
|
