src/dbms.sml

   1 (* HCoop Domtool (http://hcoop.sourceforge.net/)
   2  * Copyright (c) 2006, Adam Chlipala
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  17  *)
  18
  19 (* DBMS management code *)
  20
  21 structure Dbms :> DBMS = struct
  22
  23 open DataStructures
  24
  25 val validDbname = CharVector.all Char.isAlpha
  26
  27 type handler = {getpass : (unit -> Client.passwd_result) option,
  28                 adduser : {user : string, passwd : string option} -> string option,
  29                 passwd : {user : string, passwd : string} -> string option,
  30                 createdb : {user : string, dbname : string} -> string option}
  31
  32 val dbmses : handler StringMap.map ref = ref StringMap.empty
  33
  34 fun register (name, handler) =
  35     dbmses := StringMap.insert (!dbmses, name, handler)
  36
  37 fun lookup name = StringMap.find (!dbmses, name)
  38
  39 end