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|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2017 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
(* The file format is a header
* ("COQAUX%d %s %s\n" version hex_hash path)
* followed by an arbitrary number of entries
* ("%d %d %s %S\n" loc_begin loc_end key value) *)
open Filename
let version = 1
let oc = ref None
let aux_file_name_for vfile =
dirname vfile ^ "/." ^ chop_extension(basename vfile) ^ ".aux"
let mk_absolute vfile =
let vfile = CUnix.remove_path_dot vfile in
if Filename.is_relative vfile then CUnix.correct_path vfile (Sys.getcwd ())
else vfile
let start_aux_file ~aux_file:output_file ~v_file =
let vfile = mk_absolute v_file in
oc := Some (open_out output_file);
Printf.fprintf (Option.get !oc) "COQAUX%d %s %s\n"
version (Digest.to_hex (Digest.file vfile)) vfile
let stop_aux_file () =
close_out (Option.get !oc);
oc := None
let recording () = not (Option.is_empty !oc)
module H = Map.Make(struct type t = int * int let compare = compare end)
module M = Map.Make(String)
type data = string M.t
type aux_file = data H.t
let contents x = x
let empty_aux_file = H.empty
let get ?loc aux key = M.find key (H.find (Option.cata Loc.unloc (0,0) loc) aux)
let record_in_aux_at ?loc key v =
Option.iter (fun oc ->
match loc with
| Some loc -> let i, j = Loc.unloc loc in
Printf.fprintf oc "%d %d %s %S\n" i j key v
| None -> Printf.fprintf oc "--- %s %S\n" key v
) !oc
let current_loc : Loc.t option ref = ref None
let record_in_aux_set_at ?loc () = current_loc := loc
let record_in_aux key v = record_in_aux_at ?loc:!current_loc key v
let set h loc k v =
let m = try H.find loc h with Not_found -> M.empty in
H.add loc (M.add k v m) h
let load_aux_file_for vfile =
let vfile = mk_absolute vfile in
let ret3 x y z = x, y, z in
let ret4 x y z t = x, y, z, t in
let h = ref empty_aux_file in
let add loc k v = h := set !h loc k v in
let aux_fname = aux_file_name_for vfile in
try
let ib = Scanf.Scanning.from_channel (open_in aux_fname) in
let ver, hash, fname =
Scanf.bscanf ib "COQAUX%d %s %s\n" ret3 in
if ver <> version then raise (Failure "aux file version mismatch");
if fname <> vfile then
raise (Failure "aux file name mismatch");
let only_dummyloc = Digest.to_hex (Digest.file vfile) <> hash in
while true do
let i, j, k, v = Scanf.bscanf ib "%d %d %s %S\n" ret4 in
if not only_dummyloc || (i = 0 && j = 0) then add (i,j) k v;
done;
raise End_of_file
with
| End_of_file -> !h
| Sys_error s | Scanf.Scan_failure s
| Failure s | Invalid_argument s ->
Flags.if_verbose Feedback.msg_info Pp.(str"Loading file "++str aux_fname++str": "++str s);
empty_aux_file
let set ?loc h k v = set h (Option.cata Loc.unloc (0,0) loc) k v
|
