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(* Copyright (c) 2014, Adam Chlipala
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - The names of contributors may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*)
structure DbModeCheck :> DB_MODE_CHECK = struct
open Mono
structure IM = IntBinaryMap
fun classify (ds, ps) =
let
fun mergeModes (m1, m2) =
case (m1, m2) of
(NoDb, _) => m2
| (_, NoDb) => m1
| _ => AnyDb
fun modeOf modes =
MonoUtil.Exp.fold {typ = fn (_, dbm) => dbm,
exp = fn (EQuery _, dbm) => mergeModes (OneQuery, dbm)
| (EDml _, _) => AnyDb
| (ENextval _, _) => AnyDb
| (ESetval _, _) => AnyDb
| (ENamed n, dbm) =>
(case IM.find (modes, n) of
NONE => dbm
| SOME dbm' => mergeModes (dbm, dbm'))
| (_, dbm) => dbm} NoDb
fun decl ((d, _), modes) =
case d of
DVal (x, n, _, e, _) => IM.insert (modes, n, modeOf modes e)
| DValRec xes =>
let
val mode = foldl (fn ((_, _, _, e, _), mode) =>
let
val mode' = modeOf modes e
in
case mode' of
NoDb => mode
| _ => AnyDb
end) NoDb xes
in
foldl (fn ((_, n, _, _, _), modes) => IM.insert (modes, n, mode)) modes xes
end
| _ => modes
val modes = foldl decl IM.empty ds
val (ps, modes) = ListUtil.foldlMap (fn ((n, side, _), modes) =>
case IM.find (modes, n) of
NONE => ((n, side, AnyDb), modes)
| SOME mode => ((n, side, mode), #1 (IM.remove (modes, n))))
modes ps
val ps = IM.foldli (fn (n, mode, ps) => (n, ServerOnly, mode) :: ps) ps modes
in
(ds, ps)
end
end
|
