elmo/elmo-database.el

   1 ;;; elmo-database.el --- Database module for ELMO.
   2
   3 ;; Copyright (C) 1998,1999,2000 Yuuichi Teranishi <teranisi@gohome.org>
   4
   5 ;; Author: Yuuichi Teranishi <teranisi@gohome.org>
   6 ;; Keywords: mail, net news
   7
   8 ;; This file is part of ELMO (Elisp Library for Message Orchestration).
   9
  10 ;; This program is free software; you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation; either version 2, or (at your option)
  13 ;; any later version.
  14 ;;
  15 ;; This program is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19 ;;
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  23 ;; Boston, MA 02111-1307, USA.
  24 ;;
  25
  26 ;;; Commentary:
  27 ;;
  28
  29 ;;; Code:
  30 ;;
  31 (require 'elmo-vars)
  32
  33 (defvar elmo-database-msgid nil)
  34 (defvar elmo-database-msgid-filename "msgid")
  35
  36 (defun elmo-database-get (dbsym dbname)
  37   (if (not (and (symbol-value dbsym)
  38                 (database-live-p (symbol-value dbsym))))
  39       (set dbsym (open-database (expand-file-name
  40                                  dbname
  41                                  elmo-msgdb-directory
  42                                  )))
  43     (symbol-value dbsym)))
  44
  45 (defun elmo-database-close ()
  46   (and elmo-database-msgid
  47        (database-live-p elmo-database-msgid)
  48        (close-database elmo-database-msgid)))
  49
  50 (defun elmo-database-msgid-put (msgid folder number)
  51   (let ((db (elmo-database-get 'elmo-database-msgid
  52                                elmo-database-msgid-filename))
  53         print-length)
  54     (and msgid db
  55          (progn
  56            (remove-database msgid db)
  57            (put-database msgid (prin1-to-string
  58                                 (list folder number)) db)))))
  59
  60 (defun elmo-database-msgid-delete (msgid)
  61   (remove-database msgid (elmo-database-get
  62                           'elmo-database-msgid
  63                           elmo-database-msgid-filename)))
  64
  65 (defun elmo-database-msgid-get (msgid)
  66   (let ((match (get-database msgid (elmo-database-get
  67                                     'elmo-database-msgid
  68                                     elmo-database-msgid-filename))))
  69     (and match (read match))))
  70
  71 (require 'product)
  72 (product-provide (provide 'elmo-database) (require 'elmo-version))
  73
  74 ;;; elmo-database.el ends here