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(****************************************************************************)
(* the diy toolsuite *)
(* *)
(* Jade Alglave, University College London, UK. *)
(* Luc Maranget, INRIA Paris-Rocquencourt, France. *)
(* *)
(* Copyright 2014-present Institut National de Recherche en Informatique et *)
(* en Automatique and the authors. All rights reserved. *)
(* *)
(* This software is governed by the CeCILL-B license under French law and *)
(* abiding by the rules of distribution of free software. You can use, *)
(* modify and/ or redistribute the software under the terms of the CeCILL-B *)
(* license as circulated by CEA, CNRS and INRIA at the following URL *)
(* "http://www.cecill.info". We also give a copy in LICENSE.txt. *)
(****************************************************************************)
(* Locations for AST *)
type t = {
loc_start : Lexing.position ;
loc_end : Lexing.position ;
loc_ghost : bool ;
}
let in_file name =
let loc = {
Lexing.pos_fname = name;
pos_lnum = 1;
pos_bol = 0;
pos_cnum = -1;
} in
{ loc_start = loc; loc_end = loc; loc_ghost = true }
;;
let none = in_file "_none_";;
let make p1 p2 = { loc_start=p1; loc_end=p2; loc_ghost=false; }
let pp chan p = Pos.pp_pos2 chan (p.loc_start,p.loc_end)
module Extract() =
struct
let t = Hashtbl.create 13
let read_chan chan =
let len = in_channel_length chan in
really_input_string chan len
let read_fname fname =
try Hashtbl.find t fname
with Not_found ->
try Misc.input_protect read_chan fname
with Sys_error msg ->
Warn.fatal "Error %s, while attempting to read %s\n" msg fname
let extract t =
if t.loc_ghost then "** ?? **"
else begin
let open Lexing in
let cts = read_fname t.loc_start.pos_fname in
let n1 = t.loc_start.pos_cnum
and n2 = t.loc_end.pos_cnum in
try String.sub cts n1 (n2-n1)
with Invalid_argument _ -> assert false
end
end
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