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Monoizing FFI transactions correctly
author Adam Chlipala <adamc@hcoop.net>
date Thu, 06 Nov 2008 09:21:34 -0500
parents 322c8620bbdf
children bb27c7efcd90
rev   line source
adamc@282 1 (* Copyright (c) 2008, Adam Chlipala
adamc@282 2 * All rights reserved.
adamc@282 3 *
adamc@282 4 * Redistribution and use in source and binary forms, with or without
adamc@282 5 * modification, are permitted provided that the following conditions are met:
adamc@282 6 *
adamc@282 7 * - Redistributions of source code must retain the above copyright notice,
adamc@282 8 * this list of conditions and the following disclaimer.
adamc@282 9 * - Redistributions in binary form must reproduce the above copyright notice,
adamc@282 10 * this list of conditions and the following disclaimer in the documentation
adamc@282 11 * and/or other materials provided with the distribution.
adamc@282 12 * - The names of contributors may not be used to endorse or promote products
adamc@282 13 * derived from this software without specific prior written permission.
adamc@282 14 *
adamc@282 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@282 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@282 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@282 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@282 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
adamc@282 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@282 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@282 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@282 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@282 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@282 25 * POSSIBILITY OF SUCH DAMAGE.
adamc@282 26 *)
adamc@282 27
adamc@282 28 structure Prepare :> PREPARE = struct
adamc@282 29
adamc@282 30 open Cjr
adamc@282 31
adamc@282 32 fun prepString (e, ss, n) =
adamc@282 33 case #1 e of
adamc@282 34 EPrim (Prim.String s) =>
adamc@282 35 SOME (s :: ss, n)
adamc@282 36 | EFfiApp ("Basis", "strcat", [e1, e2]) =>
adamc@282 37 (case prepString (e1, ss, n) of
adamc@282 38 NONE => NONE
adamc@282 39 | SOME (ss, n) => prepString (e2, ss, n))
adamc@282 40 | EFfiApp ("Basis", "sqlifyInt", [e]) =>
adamc@282 41 SOME ("$" ^ Int.toString (n + 1) ^ "::int8" :: ss, n + 1)
adamc@282 42 | EFfiApp ("Basis", "sqlifyFloat", [e]) =>
adamc@282 43 SOME ("$" ^ Int.toString (n + 1) ^ "::float8" :: ss, n + 1)
adamc@282 44 | EFfiApp ("Basis", "sqlifyString", [e]) =>
adamc@282 45 SOME ("$" ^ Int.toString (n + 1) ^ "::text" :: ss, n + 1)
adamc@282 46 | EFfiApp ("Basis", "sqlifyBool", [e]) =>
adamc@282 47 SOME ("$" ^ Int.toString (n + 1) ^ "::bool" :: ss, n + 1)
adamc@439 48 | EFfiApp ("Basis", "sqlifyTime", [e]) =>
adamc@439 49 SOME ("$" ^ Int.toString (n + 1) ^ "::timestamp" :: ss, n + 1)
adamc@322 50 | ECase (e,
adamc@322 51 [((PCon (_, PConFfi {mod = "Basis", con = "True", ...}, _), _),
adamc@322 52 (EPrim (Prim.String "TRUE"), _)),
adamc@322 53 ((PCon (_, PConFfi {mod = "Basis", con = "False", ...}, _), _),
adamc@322 54 (EPrim (Prim.String "FALSE"), _))],
adamc@322 55 _) => SOME ("$" ^ Int.toString (n + 1) ^ "::bool" :: ss, n + 1)
adamc@282 56
adamc@282 57 | _ => NONE
adamc@282 58
adamc@282 59 fun prepExp (e as (_, loc), sns) =
adamc@282 60 case #1 e of
adamc@282 61 EPrim _ => (e, sns)
adamc@282 62 | ERel _ => (e, sns)
adamc@282 63 | ENamed _ => (e, sns)
adamc@282 64 | ECon (_, _, NONE) => (e, sns)
adamc@282 65 | ECon (dk, pc, SOME e) =>
adamc@282 66 let
adamc@282 67 val (e, sns) = prepExp (e, sns)
adamc@282 68 in
adamc@282 69 ((ECon (dk, pc, SOME e), loc), sns)
adamc@282 70 end
adamc@297 71 | ENone t => (e, sns)
adamc@291 72 | ESome (t, e) =>
adamc@291 73 let
adamc@291 74 val (e, sns) = prepExp (e, sns)
adamc@291 75 in
adamc@291 76 ((ESome (t, e), loc), sns)
adamc@291 77 end
adamc@282 78 | EFfi _ => (e, sns)
adamc@282 79 | EFfiApp (m, x, es) =>
adamc@282 80 let
adamc@282 81 val (es, sns) = ListUtil.foldlMap prepExp sns es
adamc@282 82 in
adamc@282 83 ((EFfiApp (m, x, es), loc), sns)
adamc@282 84 end
adamc@316 85 | EApp (e1, es) =>
adamc@282 86 let
adamc@282 87 val (e1, sns) = prepExp (e1, sns)
adamc@316 88 val (es, sns) = ListUtil.foldlMap prepExp sns es
adamc@282 89 in
adamc@316 90 ((EApp (e1, es), loc), sns)
adamc@282 91 end
adamc@282 92
adamc@387 93 | EUnop (s, e1) =>
adamc@387 94 let
adamc@387 95 val (e1, sns) = prepExp (e1, sns)
adamc@387 96 in
adamc@387 97 ((EUnop (s, e1), loc), sns)
adamc@387 98 end
adamc@387 99 | EBinop (s, e1, e2) =>
adamc@387 100 let
adamc@387 101 val (e1, sns) = prepExp (e1, sns)
adamc@387 102 val (e2, sns) = prepExp (e2, sns)
adamc@387 103 in
adamc@387 104 ((EBinop (s, e1, e2), loc), sns)
adamc@387 105 end
adamc@387 106
adamc@282 107 | ERecord (rn, xes) =>
adamc@282 108 let
adamc@282 109 val (xes, sns) = ListUtil.foldlMap (fn ((x, e), sns) =>
adamc@282 110 let
adamc@282 111 val (e, sns) = prepExp (e, sns)
adamc@282 112 in
adamc@282 113 ((x, e), sns)
adamc@282 114 end) sns xes
adamc@282 115 in
adamc@282 116 ((ERecord (rn, xes), loc), sns)
adamc@282 117 end
adamc@282 118 | EField (e, s) =>
adamc@282 119 let
adamc@282 120 val (e, sns) = prepExp (e, sns)
adamc@282 121 in
adamc@282 122 ((EField (e, s), loc), sns)
adamc@282 123 end
adamc@282 124
adamc@282 125 | ECase (e, pes, ts) =>
adamc@282 126 let
adamc@282 127 val (e, sns) = prepExp (e, sns)
adamc@282 128 val (pes, sns) = ListUtil.foldlMap (fn ((p, e), sns) =>
adamc@282 129 let
adamc@282 130 val (e, sns) = prepExp (e, sns)
adamc@282 131 in
adamc@282 132 ((p, e), sns)
adamc@282 133 end) sns pes
adamc@282 134 in
adamc@282 135 ((ECase (e, pes, ts), loc), sns)
adamc@282 136 end
adamc@282 137
adamc@283 138 | EError (e, t) =>
adamc@283 139 let
adamc@283 140 val (e, sns) = prepExp (e, sns)
adamc@283 141 in
adamc@283 142 ((EError (e, t), loc), sns)
adamc@283 143 end
adamc@283 144
adamc@282 145 | EWrite e =>
adamc@282 146 let
adamc@282 147 val (e, sns) = prepExp (e, sns)
adamc@282 148 in
adamc@282 149 ((EWrite e, loc), sns)
adamc@282 150 end
adamc@282 151 | ESeq (e1, e2) =>
adamc@282 152 let
adamc@282 153 val (e1, sns) = prepExp (e1, sns)
adamc@282 154 val (e2, sns) = prepExp (e2, sns)
adamc@282 155 in
adamc@282 156 ((ESeq (e1, e2), loc), sns)
adamc@282 157 end
adamc@282 158 | ELet (x, t, e1, e2) =>
adamc@282 159 let
adamc@282 160 val (e1, sns) = prepExp (e1, sns)
adamc@282 161 val (e2, sns) = prepExp (e2, sns)
adamc@282 162 in
adamc@282 163 ((ELet (x, t, e1, e2), loc), sns)
adamc@282 164 end
adamc@282 165
adamc@282 166 | EQuery {exps, tables, rnum, state, query, body, initial, ...} =>
adamc@282 167 (case prepString (query, [], 0) of
adamc@282 168 NONE => (e, sns)
adamc@282 169 | SOME (ss, n) =>
adamc@282 170 ((EQuery {exps = exps, tables = tables, rnum = rnum,
adamc@282 171 state = state, query = query, body = body,
adamc@282 172 initial = initial, prepared = SOME (#2 sns)}, loc),
adamc@282 173 ((String.concat (rev ss), n) :: #1 sns, #2 sns + 1)))
adamc@282 174
adamc@307 175 | EDml {dml, ...} =>
adamc@307 176 (case prepString (dml, [], 0) of
adamc@307 177 NONE => (e, sns)
adamc@307 178 | SOME (ss, n) =>
adamc@307 179 ((EDml {dml = dml, prepared = SOME (#2 sns)}, loc),
adamc@307 180 ((String.concat (rev ss), n) :: #1 sns, #2 sns + 1)))
adamc@307 181
adamc@338 182 | ENextval {seq, ...} =>
adamc@338 183 let
adamc@338 184 val s = (EFfiApp ("Basis", "strcat", [seq, (EPrim (Prim.String "')"), loc)]), loc)
adamc@338 185 val s = (EFfiApp ("Basis", "strcat", [(EPrim (Prim.String "SELECT NEXTVAL('"), loc), s]), loc)
adamc@338 186 in
adamc@338 187 case prepString (s, [], 0) of
adamc@338 188 NONE => (e, sns)
adamc@338 189 | SOME (ss, n) =>
adamc@338 190 ((ENextval {seq = seq, prepared = SOME (#2 sns)}, loc),
adamc@338 191 ((String.concat (rev ss), n) :: #1 sns, #2 sns + 1))
adamc@338 192 end
adamc@338 193
adamc@282 194 fun prepDecl (d as (_, loc), sns) =
adamc@282 195 case #1 d of
adamc@282 196 DStruct _ => (d, sns)
adamc@282 197 | DDatatype _ => (d, sns)
adamc@282 198 | DDatatypeForward _ => (d, sns)
adamc@282 199 | DVal (x, n, t, e) =>
adamc@282 200 let
adamc@282 201 val (e, sns) = prepExp (e, sns)
adamc@282 202 in
adamc@282 203 ((DVal (x, n, t, e), loc), sns)
adamc@282 204 end
adamc@282 205 | DFun (x, n, xts, t, e) =>
adamc@282 206 let
adamc@282 207 val (e, sns) = prepExp (e, sns)
adamc@282 208 in
adamc@282 209 ((DFun (x, n, xts, t, e), loc), sns)
adamc@282 210 end
adamc@282 211 | DFunRec fs =>
adamc@282 212 let
adamc@282 213 val (fs, sns) = ListUtil.foldlMap (fn ((x, n, xts, t, e), sns) =>
adamc@282 214 let
adamc@282 215 val (e, sns) = prepExp (e, sns)
adamc@282 216 in
adamc@282 217 ((x, n, xts, t, e), sns)
adamc@282 218 end) sns fs
adamc@282 219 in
adamc@282 220 ((DFunRec fs, loc), sns)
adamc@282 221 end
adamc@282 222
adamc@282 223 | DTable _ => (d, sns)
adamc@338 224 | DSequence _ => (d, sns)
adamc@282 225 | DDatabase _ => (d, sns)
adamc@282 226 | DPreparedStatements _ => (d, sns)
adamc@282 227
adamc@282 228 fun prepare (ds, ps) =
adamc@282 229 let
adamc@282 230 val (ds, (sns, _)) = ListUtil.foldlMap prepDecl ([], 0) ds
adamc@282 231 in
adamc@282 232 ((DPreparedStatements (rev sns), ErrorMsg.dummySpan) :: ds, ps)
adamc@282 233 end
adamc@282 234
adamc@282 235 end
adamc@282 236