(***********************************************************************)
(*                                                                     *)
(*                           Objective Caml                            *)
(*                                                                     *)
               , 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 Q Public License version 1.0 .               
(*                                                                     *)
(***********************************************************************)

  $ I d : consistbl.ml , v 1.1 2007/09/24 23:04:52 so294 Exp $

  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 tbl =
  Hashtbl.fold (fun name (crc, auth) accu -> (name, crc) :: accu) tbl []

let filter p tbl =
  let to_remove = ref [] in
  Hashtbl.iter
    (fun name (crc, auth) ->
      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

*********************************************************************
                                                                     
                           Objective Caml                            
                                                                     
                                                                     
                                                                     
*********************************************************************
               , 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 Q Public License version 1.0 .               

  $ I d : consistbl.ml , v 1.1 2007/09/24 23:04:52 so294 Exp $

  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 tbl =
  Hashtbl.fold (fun name (crc, auth) accu -> (name, crc) :: accu) tbl []

let filter p tbl =
  let to_remove = ref [] in
  Hashtbl.iter
    (fun name (crc, auth) ->
      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
