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annotate src/settings.sml @ 1319:c17e6144510b

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Fix RPC deserialization of channels
author Adam Chlipala <adam@chlipala.net>
date Fri, 19 Nov 2010 17:06:11 -0500
parents 714e8b84221b
children 0d8bd8ae8417
rev   line source
adamc@1114 1 (* Copyright (c) 2008-2010, Adam Chlipala
adamc@764 2 * All rights reserved.
adamc@764 3 *
adamc@764 4 * Redistribution and use in source and binary forms, with or without
adamc@764 5 * modification, are permitted provided that the following conditions are met:
adamc@764 6 *
adamc@764 7 * - Redistributions of source code must retain the above copyright notice,
adamc@764 8 * this list of conditions and the following disclaimer.
adamc@764 9 * - Redistributions in binary form must reproduce the above copyright notice,
adamc@764 10 * this list of conditions and the following disclaimer in the documentation
adamc@764 11 * and/or other materials provided with the distribution.
adamc@764 12 * - The names of contributors may not be used to endorse or promote products
adamc@764 13 * derived from this software without specific prior written permission.
adamc@764 14 *
adamc@764 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@764 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@764 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@764 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@764 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
adamc@764 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@764 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@764 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@764 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@764 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@764 25 * POSSIBILITY OF SUCH DAMAGE.
adamc@764 26 *)
adamc@764 27
adamc@764 28 structure Settings :> SETTINGS = struct
adamc@764 29
adamc@764 30 val urlPrefix = ref "/"
adamc@764 31 val timeout = ref 0
adamc@764 32 val headers = ref ([] : string list)
adamc@766 33 val scripts = ref ([] : string list)
adamc@764 34
adamc@764 35 fun getUrlPrefix () = !urlPrefix
adamc@764 36 fun setUrlPrefix p =
adamc@764 37 urlPrefix := (if p = "" then
adamc@764 38 "/"
adamc@764 39 else if String.sub (p, size p - 1) <> #"/" then
adamc@764 40 p ^ "/"
adamc@764 41 else
adamc@764 42 p)
adamc@764 43
adamc@764 44 fun getTimeout () = !timeout
adamc@764 45 fun setTimeout n = timeout := n
adamc@764 46
adamc@764 47 fun getHeaders () = !headers
adamc@764 48 fun setHeaders ls = headers := ls
adamc@764 49
adamc@766 50 fun getScripts () = !scripts
adamc@766 51 fun setScripts ls = scripts := ls
adamc@766 52
adamc@765 53 type ffi = string * string
adamc@765 54
adamc@765 55 structure K = struct
adamc@765 56 type ord_key = ffi
adamc@765 57 fun compare ((m1, x1), (m2, x2)) =
adamc@765 58 Order.join (String.compare (m1, m2),
adamc@765 59 fn () => String.compare (x1, x2))
adamc@764 60 end
adamc@765 61
adamc@765 62 structure S = BinarySetFn(K)
adamc@765 63 structure M = BinaryMapFn(K)
adamc@765 64
adamc@765 65 fun basis x = S.addList (S.empty, map (fn x : string => ("Basis", x)) x)
adamc@765 66
adamc@765 67 val clientToServerBase = basis ["int",
adamc@765 68 "float",
adamc@765 69 "string",
adamc@765 70 "time",
adamc@765 71 "file",
adamc@765 72 "unit",
adamc@765 73 "option",
adamc@765 74 "list",
adam@1288 75 "bool",
adam@1288 76 "variant"]
adamc@765 77 val clientToServer = ref clientToServerBase
adamc@765 78 fun setClientToServer ls = clientToServer := S.addList (clientToServerBase, ls)
adamc@765 79 fun mayClientToServer x = S.member (!clientToServer, x)
adamc@765 80
adamc@779 81 val effectfulBase = basis ["dml",
adamc@779 82 "nextval",
adamc@1073 83 "setval",
adamc@779 84 "set_cookie",
adamc@1050 85 "clear_cookie",
adamc@765 86 "new_channel",
adamc@1200 87 "send",
adamc@1200 88 "htmlifyInt_w",
adamc@1200 89 "htmlifyFloat_w",
adamc@1200 90 "htmlifyString_w",
adamc@1200 91 "htmlifyBool_w",
adamc@1200 92 "htmlifyTime_w",
adamc@1200 93 "attrifyInt_w",
adamc@1200 94 "attrifyFloat_w",
adamc@1200 95 "attrifyString_w",
adamc@1200 96 "attrifyChar_w",
adamc@1200 97 "urlifyInt_w",
adamc@1200 98 "urlifyFloat_w",
adamc@1200 99 "urlifyString_w",
adamc@1200 100 "urlifyBool_w",
adamc@1200 101 "urlifyChannel_w"]
adamc@765 102
adamc@765 103 val effectful = ref effectfulBase
adamc@765 104 fun setEffectful ls = effectful := S.addList (effectfulBase, ls)
adamc@765 105 fun isEffectful x = S.member (!effectful, x)
adamc@765 106
adamc@1171 107 val benignBase = basis ["get_cookie",
adamc@1171 108 "new_client_source",
adamc@1171 109 "get_client_source",
adamc@1171 110 "set_client_source",
adamc@1171 111 "current",
adamc@1171 112 "alert",
adam@1290 113 "confirm",
adamc@1171 114 "onError",
adamc@1171 115 "onFail",
adamc@1171 116 "onConnectFail",
adamc@1171 117 "onDisconnect",
adamc@1171 118 "onServerError",
adamc@1171 119 "kc",
adamc@1250 120 "debug",
adamc@1250 121 "rand"]
adamc@1171 122
adamc@1171 123 val benign = ref benignBase
adamc@1171 124 fun setBenignEffectful ls = benign := S.addList (benignBase, ls)
adamc@1171 125 fun isBenignEffectful x = S.member (!benign, x)
adamc@1171 126
adamc@765 127 val clientBase = basis ["get",
adamc@765 128 "set",
adamc@841 129 "current",
adamc@765 130 "alert",
adam@1290 131 "confirm",
adamc@765 132 "recv",
adamc@765 133 "sleep",
adamc@765 134 "spawn",
adamc@765 135 "onError",
adamc@765 136 "onFail",
adamc@765 137 "onConnectFail",
adamc@765 138 "onDisconnect",
adamc@895 139 "onServerError",
adamc@895 140 "kc"]
adamc@765 141 val client = ref clientBase
adamc@765 142 fun setClientOnly ls = client := S.addList (clientBase, ls)
adamc@765 143 fun isClientOnly x = S.member (!client, x)
adamc@765 144
adamc@765 145 val serverBase = basis ["requestHeader",
adamc@765 146 "query",
adamc@765 147 "dml",
adamc@765 148 "nextval",
adamc@1073 149 "setval",
adamc@765 150 "channel",
adamc@765 151 "send"]
adamc@765 152 val server = ref serverBase
adamc@765 153 fun setServerOnly ls = server := S.addList (serverBase, ls)
adamc@765 154 fun isServerOnly x = S.member (!server, x)
adamc@765 155
adamc@765 156 val basisM = foldl (fn ((k, v : string), m) => M.insert (m, ("Basis", k), v)) M.empty
adamc@765 157
adamc@765 158 val jsFuncsBase = basisM [("alert", "alert"),
adam@1290 159 ("confirm", "confrm"),
adamc@765 160 ("get_client_source", "sg"),
adamc@841 161 ("current", "scur"),
adamc@765 162 ("htmlifyBool", "bs"),
adamc@765 163 ("htmlifyFloat", "ts"),
adamc@765 164 ("htmlifyInt", "ts"),
adamc@765 165 ("htmlifyString", "eh"),
adamc@765 166 ("new_client_source", "sc"),
adamc@765 167 ("set_client_source", "sv"),
adamc@838 168 ("stringToFloat", "pflo"),
adamc@838 169 ("stringToInt", "pio"),
adamc@765 170 ("stringToFloat_error", "pfl"),
adamc@765 171 ("stringToInt_error", "pi"),
adamc@765 172 ("urlifyInt", "ts"),
adamc@765 173 ("urlifyFloat", "ts"),
adamc@765 174 ("urlifyString", "uf"),
adamc@912 175 ("urlifyBool", "ub"),
adamc@765 176 ("recv", "rv"),
adamc@765 177 ("strcat", "cat"),
adamc@765 178 ("intToString", "ts"),
adamc@765 179 ("floatToString", "ts"),
adamc@821 180 ("charToString", "ts"),
adamc@765 181 ("onError", "onError"),
adamc@765 182 ("onFail", "onFail"),
adamc@765 183 ("onConnectFail", "onConnectFail"),
adamc@765 184 ("onDisconnect", "onDisconnect"),
adamc@798 185 ("onServerError", "onServerError"),
adamc@1108 186 ("attrifyString", "atr"),
adamc@798 187 ("attrifyInt", "ts"),
adamc@798 188 ("attrifyFloat", "ts"),
adamc@820 189 ("attrifyBool", "bs"),
adamc@821 190 ("boolToString", "ts"),
adamc@1057 191 ("str1", "id"),
adamc@821 192 ("strsub", "sub"),
adamc@828 193 ("strsuffix", "suf"),
adamc@829 194 ("strlen", "slen"),
adamc@829 195 ("strindex", "sidx"),
adamc@829 196 ("strchr", "schr"),
adamc@831 197 ("substring", "ssub"),
adamc@895 198 ("strcspn", "sspn"),
adamc@1061 199 ("kc", "kc"),
adamc@1061 200
adamc@1061 201 ("islower", "isLower"),
adamc@1061 202 ("isupper", "isUpper"),
adamc@1061 203 ("isalpha", "isAlpha"),
adamc@1061 204 ("isdigit", "isDigit"),
adamc@1061 205 ("isalnum", "isAlnum"),
adamc@1061 206 ("isblank", "isBlank"),
adamc@1061 207 ("isspace", "isSpace"),
adamc@1061 208 ("isxdigit", "isXdigit"),
adamc@1061 209 ("tolower", "toLower"),
adamc@1061 210 ("toupper", "toUpper")]
adamc@765 211 val jsFuncs = ref jsFuncsBase
adamc@765 212 fun setJsFuncs ls = jsFuncs := foldl (fn ((k, v), m) => M.insert (m, k, v)) jsFuncsBase ls
adamc@765 213 fun jsFunc x = M.find (!jsFuncs, x)
adamc@765 214
adamc@768 215 datatype pattern_kind = Exact | Prefix
adamc@768 216 datatype action = Allow | Deny
adamc@768 217 type rule = { action : action, kind : pattern_kind, pattern : string }
adamc@768 218
adamc@768 219 datatype path_kind = Any | Url | Table | Sequence | View | Relation | Cookie | Style
adamc@768 220 type rewrite = { pkind : path_kind, kind : pattern_kind, from : string, to : string }
adamc@768 221
adamc@768 222 val rewrites = ref ([] : rewrite list)
adamc@768 223
adamc@768 224 fun subsume (pk1, pk2) =
adamc@768 225 pk1 = pk2
adamc@768 226 orelse pk2 = Any
adamc@768 227 orelse pk2 = Relation andalso (pk1 = Table orelse pk1 = Sequence orelse pk1 = View)
adamc@768 228
adamc@768 229 fun setRewriteRules ls = rewrites := ls
adamc@768 230 fun rewrite pk s =
adamc@768 231 let
adamc@768 232 fun rew (ls : rewrite list) =
adamc@768 233 case ls of
adamc@768 234 [] => s
adamc@768 235 | rewr :: ls =>
adamc@768 236 let
adamc@768 237 fun match () =
adamc@768 238 case #kind rewr of
adamc@768 239 Exact => if #from rewr = s then
adamc@768 240 SOME (size s)
adamc@768 241 else
adamc@768 242 NONE
adamc@768 243 | Prefix => if String.isPrefix (#from rewr) s then
adamc@768 244 SOME (size (#from rewr))
adamc@768 245 else
adamc@768 246 NONE
adamc@768 247 in
adamc@768 248 if subsume (pk, #pkind rewr) then
adamc@768 249 case match () of
adamc@768 250 NONE => rew ls
adamc@768 251 | SOME suffixStart => #to rewr ^ String.extract (s, suffixStart, NONE)
adamc@768 252 else
adamc@768 253 rew ls
adamc@768 254 end
adamc@768 255 in
adamc@768 256 rew (!rewrites)
adamc@768 257 end
adamc@768 258
adamc@769 259 val url = ref ([] : rule list)
adamc@769 260 val mime = ref ([] : rule list)
adamc@769 261
adamc@769 262 fun setUrlRules ls = url := ls
adamc@769 263 fun setMimeRules ls = mime := ls
adamc@769 264
adamc@770 265 fun getUrlRules () = !url
adamc@770 266 fun getMimeRules () = !mime
adamc@770 267
adamc@769 268 fun check f rules s =
adamc@769 269 let
adamc@769 270 fun chk (ls : rule list) =
adamc@769 271 case ls of
adamc@769 272 [] => false
adamc@769 273 | rule :: ls =>
adamc@769 274 let
adamc@769 275 val matches =
adamc@769 276 case #kind rule of
adamc@769 277 Exact => #pattern rule = s
adamc@769 278 | Prefix => String.isPrefix (#pattern rule) s
adamc@769 279 in
adamc@769 280 if matches then
adamc@769 281 case #action rule of
adamc@769 282 Allow => true
adamc@769 283 | Deny => false
adamc@769 284 else
adamc@769 285 chk ls
adamc@769 286 end
adamc@769 287 in
adamc@769 288 f s andalso chk (!rules)
adamc@769 289 end
adamc@769 290
adamc@769 291 val checkUrl = check (fn _ => true) url
adamc@769 292 val checkMime = check
adamc@769 293 (CharVector.all (fn ch => Char.isAlphaNum ch orelse ch = #"/" orelse ch = #"-" orelse ch = #"."))
adamc@769 294 mime
adamc@769 295
adamc@855 296
adamc@855 297 type protocol = {
adamc@855 298 name : string,
adamc@1096 299 compile : string,
adamc@1095 300 linkStatic : string,
adamc@1095 301 linkDynamic : string,
adamc@1164 302 persistent : bool,
adamc@1164 303 code : unit -> Print.PD.pp_desc
adamc@855 304 }
adamc@855 305 val protocols = ref ([] : protocol list)
adamc@855 306 fun addProtocol p = protocols := p :: !protocols
adamc@855 307 fun getProtocol s = List.find (fn p => #name p = s) (!protocols)
adamc@855 308
adamc@855 309 fun clibFile s = OS.Path.joinDirFile {dir = Config.libC,
adamc@855 310 file = s}
adamc@855 311
adamc@865 312 val curProto = ref {name = "",
adamc@1096 313 compile = "",
adamc@1095 314 linkStatic = "",
adamc@1095 315 linkDynamic = "",
adamc@1164 316 persistent = false,
adamc@1164 317 code = fn () => Print.box []}
adamc@856 318 fun setProtocol name =
adamc@856 319 case getProtocol name of
adamc@856 320 NONE => raise Fail ("Unknown protocol " ^ name)
adamc@856 321 | SOME p => curProto := p
adamc@855 322 fun currentProtocol () = !curProto
adamc@855 323
adamc@857 324 val debug = ref false
adamc@857 325 fun setDebug b = debug := b
adamc@857 326 fun getDebug () = !debug
adamc@857 327
adamc@867 328 datatype sql_type =
adamc@867 329 Int
adamc@867 330 | Float
adamc@867 331 | String
adamc@1011 332 | Char
adamc@867 333 | Bool
adamc@867 334 | Time
adamc@867 335 | Blob
adamc@867 336 | Channel
adamc@867 337 | Client
adamc@867 338 | Nullable of sql_type
adamc@867 339
adamc@873 340 fun p_sql_ctype t =
adamc@867 341 let
adamc@867 342 open Print.PD
adamc@867 343 open Print
adamc@867 344 in
adamc@867 345 case t of
adamc@870 346 Int => "uw_Basis_int"
adamc@870 347 | Float => "uw_Basis_float"
adamc@870 348 | String => "uw_Basis_string"
adamc@1011 349 | Char => "uw_Basis_char"
adamc@870 350 | Bool => "uw_Basis_bool"
adamc@870 351 | Time => "uw_Basis_time"
adamc@870 352 | Blob => "uw_Basis_blob"
adamc@870 353 | Channel => "uw_Basis_channel"
adamc@870 354 | Client => "uw_Basis_client"
adamc@870 355 | Nullable String => "uw_Basis_string"
adamc@873 356 | Nullable t => p_sql_ctype t ^ "*"
adamc@867 357 end
adamc@867 358
adamc@867 359 fun isBlob Blob = true
adamc@867 360 | isBlob (Nullable t) = isBlob t
adamc@867 361 | isBlob _ = false
adamc@867 362
adamc@870 363 fun isNotNull (Nullable _) = false
adamc@870 364 | isNotNull _ = true
adamc@870 365
adam@1293 366 datatype failure_mode = Error | None
adam@1293 367
adamc@866 368 type dbms = {
adamc@866 369 name : string,
adamc@866 370 header : string,
adamc@866 371 link : string,
adamc@873 372 p_sql_type : sql_type -> string,
adamc@870 373 init : {dbstring : string,
adamc@870 374 prepared : (string * int) list,
adamc@870 375 tables : (string * (string * sql_type) list) list,
adamc@872 376 views : (string * (string * sql_type) list) list,
adamc@870 377 sequences : string list} -> Print.PD.pp_desc,
adamc@873 378 query : {loc : ErrorMsg.span, cols : sql_type list,
adamc@880 379 doCols : ({loc : ErrorMsg.span, wontLeakStrings : bool, col : int, typ : sql_type} -> Print.PD.pp_desc)
adamc@867 380 -> Print.PD.pp_desc}
adamc@867 381 -> Print.PD.pp_desc,
adamc@867 382 queryPrepared : {loc : ErrorMsg.span, id : int, query : string,
adamc@873 383 inputs : sql_type list, cols : sql_type list,
adamc@880 384 doCols : ({loc : ErrorMsg.span, wontLeakStrings : bool, col : int,
adamc@880 385 typ : sql_type} -> Print.PD.pp_desc)
adamc@879 386 -> Print.PD.pp_desc,
adamc@879 387 nested : bool}
adamc@868 388 -> Print.PD.pp_desc,
adam@1293 389 dml : ErrorMsg.span * failure_mode -> Print.PD.pp_desc,
adamc@868 390 dmlPrepared : {loc : ErrorMsg.span, id : int, dml : string,
adam@1293 391 inputs : sql_type list, mode : failure_mode} -> Print.PD.pp_desc,
adamc@878 392 nextval : {loc : ErrorMsg.span, seqName : string option, seqE : Print.PD.pp_desc} -> Print.PD.pp_desc,
adamc@874 393 nextvalPrepared : {loc : ErrorMsg.span, id : int, query : string} -> Print.PD.pp_desc,
adamc@1073 394 setval : {loc : ErrorMsg.span, seqE : Print.PD.pp_desc, count : Print.PD.pp_desc} -> Print.PD.pp_desc,
adamc@874 395 sqlifyString : string -> string,
adamc@874 396 p_cast : string * sql_type -> string,
adamc@874 397 p_blank : int * sql_type -> string,
adamc@877 398 supportsDeleteAs : bool,
adamc@886 399 supportsUpdateAs : bool,
adamc@877 400 createSequence : string -> string,
adamc@878 401 textKeysNeedLengths : bool,
adamc@879 402 supportsNextval : bool,
adamc@882 403 supportsNestedPrepared : bool,
adamc@890 404 sqlPrefix : string,
adamc@1014 405 supportsOctetLength : bool,
adamc@1014 406 trueString : string,
adamc@1196 407 falseString : string,
adamc@1196 408 onlyUnion : bool,
adamc@1196 409 nestedRelops : bool
adamc@866 410 }
adamc@866 411
adamc@866 412 val dbmses = ref ([] : dbms list)
adamc@866 413 val curDb = ref ({name = "",
adamc@866 414 header = "",
adamc@866 415 link = "",
adamc@873 416 p_sql_type = fn _ => "",
adamc@867 417 init = fn _ => Print.box [],
adamc@867 418 query = fn _ => Print.box [],
adamc@868 419 queryPrepared = fn _ => Print.box [],
adamc@868 420 dml = fn _ => Print.box [],
adamc@869 421 dmlPrepared = fn _ => Print.box [],
adamc@869 422 nextval = fn _ => Print.box [],
adamc@874 423 nextvalPrepared = fn _ => Print.box [],
adamc@1073 424 setval = fn _ => Print.box [],
adamc@874 425 sqlifyString = fn s => s,
adamc@874 426 p_cast = fn _ => "",
adamc@874 427 p_blank = fn _ => "",
adamc@877 428 supportsDeleteAs = false,
adamc@886 429 supportsUpdateAs = false,
adamc@877 430 createSequence = fn _ => "",
adamc@878 431 textKeysNeedLengths = false,
adamc@879 432 supportsNextval = false,
adamc@882 433 supportsNestedPrepared = false,
adamc@890 434 sqlPrefix = "",
adamc@1014 435 supportsOctetLength = false,
adamc@1014 436 trueString = "",
adamc@1196 437 falseString = "",
adamc@1196 438 onlyUnion = false,
adamc@1196 439 nestedRelops = false} : dbms)
adamc@866 440
adamc@866 441 fun addDbms v = dbmses := v :: !dbmses
adamc@866 442 fun setDbms s =
adamc@866 443 case List.find (fn db => #name db = s) (!dbmses) of
adamc@866 444 NONE => raise Fail ("Unknown DBMS " ^ s)
adamc@866 445 | SOME db => curDb := db
adamc@866 446 fun currentDbms () = !curDb
adamc@866 447
adamc@891 448 val dbstring = ref (NONE : string option)
adamc@891 449 fun setDbstring so = dbstring := so
adamc@891 450 fun getDbstring () = !dbstring
adamc@891 451
adamc@891 452 val exe = ref (NONE : string option)
adamc@891 453 fun setExe so = exe := so
adamc@891 454 fun getExe () = !exe
adamc@891 455
adamc@891 456 val sql = ref (NONE : string option)
adamc@891 457 fun setSql so = sql := so
adamc@891 458 fun getSql () = !sql
adamc@891 459
adamc@1016 460 val coreInline = ref 20
adamc@1016 461 fun setCoreInline n = coreInline := n
adamc@1016 462 fun getCoreInline () = !coreInline
adamc@1016 463
adamc@1016 464 val monoInline = ref 20
adamc@1016 465 fun setMonoInline n = monoInline := n
adamc@1016 466 fun getMonoInline () = !monoInline
adamc@1016 467
adamc@1095 468 val staticLinking = ref false
adamc@1095 469 fun setStaticLinking b = staticLinking := b
adamc@1095 470 fun getStaticLinking () = !staticLinking
adamc@1095 471
adamc@1114 472 val deadlines = ref false
adamc@1114 473 fun setDeadlines b = deadlines := b
adamc@1114 474 fun getDeadlines () = !deadlines
adamc@1114 475
adamc@1164 476 val sigFile = ref (NONE : string option)
adamc@1164 477 fun setSigFile v = sigFile := v
adamc@1164 478 fun getSigFile () = !sigFile
adamc@1164 479
adamc@1183 480 structure SS = BinarySetFn(struct
adamc@1183 481 type ord_key = string
adamc@1183 482 val compare = String.compare
adamc@1183 483 end)
adamc@1183 484
adamc@1183 485 val safeGet = ref SS.empty
adamc@1183 486 fun setSafeGets ls = safeGet := SS.addList (SS.empty, ls)
adamc@1183 487 fun isSafeGet x = SS.member (!safeGet, x)
adamc@1183 488
adam@1294 489 val onError = ref (NONE : (string * string list * string) option)
adam@1294 490 fun setOnError x = onError := x
adam@1294 491 fun getOnError () = !onError
adam@1294 492
adam@1307 493 val limits = ["messages", "clients", "headers", "page", "heap", "script",
adam@1307 494 "inputs", "subinputs", "cleanup", "deltas", "transactionals",
adam@1308 495 "globals", "database", "time"]
adam@1307 496
adam@1307 497 val limitsList = ref ([] : (string * int) list)
adam@1307 498 fun addLimit (v as (name, _)) =
adam@1307 499 if List.exists (fn name' => name' = name) limits then
adam@1308 500 (limitsList := v :: !limitsList;
adam@1308 501 if name = "time" then
adam@1308 502 setDeadlines true
adam@1308 503 else
adam@1308 504 ())
adam@1307 505 else
adam@1307 506 raise Fail ("Unknown limit category '" ^ name ^ "'")
adam@1307 507 fun limits () = !limitsList
adam@1307 508
adamc@765 509 end