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consistbl.ml
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consistbl.ml
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(**************************************************************************)
(* *)
(* OCaml *)
(* *)
(* Xavier Leroy, projet Cristal, INRIA Rocquencourt *)
(* *)
(* Copyright 2002 Institut National de Recherche en Informatique et *)
(* en Automatique. *)
(* *)
(* All rights reserved. This file is distributed under the terms of *)
(* the GNU Lesser General Public License version 2.1, with the *)
(* special exception on linking described in the file LICENSE. *)
(* *)
(**************************************************************************)
(* Consistency tables: for checking consistency of module CRCs *)
type t = (string, Digest.t * string) Hashtbl.t
let create () = Hashtbl.create 13
let clear = Hashtbl.clear
exception Inconsistency of string * string * string
exception Not_available of string
let check tbl name crc source =
try
let (old_crc, old_source) = Hashtbl.find tbl name in
if crc <> old_crc then raise(Inconsistency(name, source, old_source))
with Not_found ->
Hashtbl.add tbl name (crc, source)
let check_noadd tbl name crc source =
try
let (old_crc, old_source) = Hashtbl.find tbl name in
if crc <> old_crc then raise(Inconsistency(name, source, old_source))
with Not_found ->
raise (Not_available name)
let set tbl name crc source = Hashtbl.add tbl name (crc, source)
let source tbl name = snd (Hashtbl.find tbl name)
let extract l tbl =
let l = List.sort_uniq String.compare l in
List.fold_left
(fun assc name ->
try
let (crc, _) = Hashtbl.find tbl name in
(name, Some crc) :: assc
with Not_found ->
(name, None) :: assc)
[] l
let filter p tbl =
let to_remove = ref [] in
Hashtbl.iter
(fun name _ ->
if not (p name) then to_remove := name :: !to_remove)
tbl;
List.iter
(fun name ->
while Hashtbl.mem tbl name do Hashtbl.remove tbl name done)
!to_remove