+++ /dev/null
-(* Copyright (C) 2000, HELM Team.
- *
- * This file is part of HELM, an Hypertextual, Electronic
- * Library of Mathematics, developed at the Computer Science
- * Department, University of Bologna, Italy.
- *
- * HELM is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * HELM is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with HELM; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- * MA 02111-1307, USA.
- *
- * For details, see the HELM World-Wide-Web page,
- * http://cs.unibo.it/helm/.
- *)
-
-(* AUTOR: Ferruccio Guidi <fguidi@cs.unibo.it>
- *)
-
-type connection = MySQL_C of Mysql.dbd
- | Postgres_C of Postgres.connection
- | No_C
-
-type flag = Galax | Postgres | Queries | Result | Source | Times | Warn
-
-type handle = {
- log : string -> unit; (* logging function *)
- set : flag list; (* options *)
- pgc : connection; (* PG connection *)
- pgm : MQIMap.pg_map; (* PG conversion function *)
- pga : MQIMap.pg_alias (* PG table aliases *)
-}
-
-let tables handle p = MQIMap.get_tables handle.pgm p
-
-let field handle p t = MQIMap.get_field handle.pgm p t
-
-let resolve handle a = MQIMap.resolve handle.pga a
-
-let log handle = handle.log
-
-let set handle flag = List.mem flag handle.set
-
-let pgc handle = handle.pgc
-
-let flags handle = handle.set
-
-let string_of_flag = function
- | Galax -> "G"
- | Postgres -> "P"
- | Queries -> "Q"
- | Result -> "R"
- | Source -> "S"
- | Times -> "T"
- | Warn -> "W"
-
-let flag_of_char = function
- | 'G' -> [Galax]
- | 'P' -> [Postgres]
- | 'Q' -> [Queries]
- | 'R' -> [Result]
- | 'S' -> [Source]
- | 'T' -> [Times]
- | 'W' -> [Warn]
- | _ -> []
-
-let string_fold_left f a s =
- let l = String.length s in
- let rec aux b i = if i = l then b else aux (f b s.[i]) (succ i) in
- aux a 0
-
-let string_of_flags flags =
- List.fold_left (fun s flag -> s ^ string_of_flag flag) "" flags
-
-let flags_of_string s =
- string_fold_left (fun l c -> l @ flag_of_char c) [] s
-
-let init ?(flags = []) ?(log = ignore) () =
- let flags =
- if flags = [] then
- flags_of_string (Helm_registry.get "mathql_interpreter.flags")
- else
- flags
- in
- let m, a =
- let g =
- if List.mem Galax flags
- then MQIMap.empty_map else MQIMap.read_map
- in g ()
- in
- {log = log; set = flags;
- pgc = begin
- try
- if List.mem Galax flags then No_C else
- if List.mem Postgres flags then Postgres_C (MQIPostgres.init ()) else
- MySQL_C (MQIMySql.init ())
- with Failure "mqi_connection" -> No_C
- end;
- pgm = m; pga = a
- }
-
-let close handle =
- match pgc handle with
- | MySQL_C c -> MQIMySql.close c
- | Postgres_C c -> MQIPostgres.close c
- | No_C -> ()
-
-let exec handle out table cols ct cfl =
- match pgc handle with
- | MySQL_C c -> MQIMySql.exec (c, out) table cols ct cfl
- | Postgres_C c -> MQIPostgres.exec (c, out) table cols ct cfl
- | No_C -> []
-
-let connected handle =
- pgc handle <> No_C
-
-let init_if_connected ?(flags = []) ?(log = ignore) () =
- let handle = init ~flags:flags ~log:log () in
- if connected handle then handle else raise (Failure "mqi connection failed")