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annotate src/pathcheck.sml @ 854:158d980889ac

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Further refactoring of request.c to work with CGI
author Adam Chlipala <adamc@hcoop.net>
date Tue, 23 Jun 2009 15:40:35 -0400
parents 4c5796512edc
children 72670131dace
rev   line source
adamc@377 1 (* Copyright (c) 2008, Adam Chlipala
adamc@377 2 * All rights reserved.
adamc@377 3 *
adamc@377 4 * Redistribution and use in source and binary forms, with or without
adamc@377 5 * modification, are permitted provided that the following conditions are met:
adamc@377 6 *
adamc@377 7 * - Redistributions of source code must retain the above copyright notice,
adamc@377 8 * this list of conditions and the following disclaimer.
adamc@377 9 * - Redistributions in binary form must reproduce the above copyright notice,
adamc@377 10 * this list of conditions and the following disclaimer in the documentation
adamc@377 11 * and/or other materials provided with the distribution.
adamc@377 12 * - The names of contributors may not be used to endorse or promote products
adamc@377 13 * derived from this software without specific prior written permission.
adamc@377 14 *
adamc@377 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@377 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@377 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@377 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@377 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
adamc@377 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@377 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@377 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@377 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@377 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@377 25 * POSSIBILITY OF SUCH DAMAGE.
adamc@377 26 *)
adamc@377 27
adamc@377 28 structure PathCheck :> PATH_CHECK = struct
adamc@377 29
adamc@377 30 open Mono
adamc@377 31
adamc@377 32 structure E = ErrorMsg
adamc@377 33
adamc@377 34 structure SS = BinarySetFn(struct
adamc@377 35 type ord_key = string
adamc@377 36 val compare = String.compare
adamc@377 37 end)
adamc@377 38
adamc@725 39 fun checkDecl ((d, loc), (funcs, rels, cookies, styles)) =
adamc@377 40 let
adamc@704 41 fun doFunc s =
adamc@704 42 (if SS.member (funcs, s) then
adamc@704 43 E.errorAt loc ("Duplicate function path " ^ s)
adamc@704 44 else
adamc@704 45 ();
adamc@725 46 (SS.add (funcs, s), rels, cookies, styles))
adamc@704 47
adamc@377 48 fun doRel s =
adamc@377 49 (if SS.member (rels, s) then
adamc@377 50 E.errorAt loc ("Duplicate table/sequence path " ^ s)
adamc@377 51 else
adamc@377 52 ();
adamc@725 53 (funcs, SS.add (rels, s), cookies, styles))
adamc@725 54
adamc@725 55 fun doCookie s =
adamc@725 56 (if SS.member (cookies, s) then
adamc@725 57 E.errorAt loc ("Duplicate cookie path " ^ s)
adamc@725 58 else
adamc@725 59 ();
adamc@725 60 (funcs, rels, SS.add (cookies, s), styles))
adamc@725 61
adamc@725 62 fun doStyle s =
adamc@725 63 (if SS.member (styles, s) then
adamc@725 64 E.errorAt loc ("Duplicate style path " ^ s)
adamc@725 65 else
adamc@725 66 ();
adamc@725 67 (funcs, rels, cookies, SS.add (styles, s)))
adamc@377 68 in
adamc@377 69 case d of
adamc@704 70 DExport (_, s, _, _, _) => doFunc s
adamc@377 71
adamc@707 72 | DTable (s, _, pe, ce) =>
adamc@704 73 let
adamc@704 74 fun constraints (e, rels) =
adamc@704 75 case #1 e of
adamc@704 76 ERecord [(s', _, _)] =>
adamc@704 77 let
adamc@704 78 val s' = s ^ "_" ^ s'
adamc@704 79 in
adamc@704 80 if SS.member (rels, s') then
adamc@704 81 E.errorAt loc ("Duplicate constraint path " ^ s')
adamc@704 82 else
adamc@704 83 ();
adamc@704 84 SS.add (rels, s')
adamc@704 85 end
adamc@704 86 | EStrcat (e1, e2) => constraints (e2, constraints (e1, rels))
adamc@704 87 | _ => rels
adamc@707 88
adamc@707 89 val rels = #2 (doRel s)
adamc@707 90 val rels = case #1 pe of
adamc@707 91 EPrim (Prim.String "") => rels
adamc@707 92 | _ =>
adamc@707 93 let
adamc@707 94 val s' = s ^ "_Pkey"
adamc@707 95 in
adamc@707 96 if SS.member (rels, s') then
adamc@707 97 E.errorAt loc ("Duplicate primary key constraint path " ^ s')
adamc@707 98 else
adamc@707 99 ();
adamc@707 100 SS.add (rels, s')
adamc@707 101 end
adamc@704 102 in
adamc@725 103 (funcs, constraints (ce, rels), cookies, styles)
adamc@704 104 end
adamc@377 105 | DSequence s => doRel s
adamc@377 106
adamc@725 107 | DCookie s => doCookie s
adamc@725 108 | DStyle s => doStyle s
adamc@725 109
adamc@725 110 | _ => (funcs, rels, cookies, styles)
adamc@377 111 end
adamc@377 112
adamc@725 113 fun check ds = ignore (foldl checkDecl (SS.empty, SS.empty, SS.empty, SS.empty) ds)
adamc@377 114
adamc@377 115 end