Execute.cpp

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2015  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU Affero General Public License, Version 3 {{{ */
   6 /*
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 #include "cycript.hpp"
  23
  24 #include <iostream>
  25 #include <set>
  26 #include <map>
  27 #include <iomanip>
  28 #include <sstream>
  29 #include <cmath>
  30
  31 #include <dlfcn.h>
  32 #include <dirent.h>
  33 #include <fcntl.h>
  34 #include <unistd.h>
  35
  36 #include <sys/mman.h>
  37 #include <sys/stat.h>
  38
  39 #include "sig/parse.hpp"
  40 #include "sig/ffi_type.hpp"
  41
  42 #include "Code.hpp"
  43 #include "Decode.hpp"
  44 #include "Error.hpp"
  45 #include "Execute.hpp"
  46 #include "Internal.hpp"
  47 #include "JavaScript.hpp"
  48 #include "Pooling.hpp"
  49 #include "String.hpp"
  50
  51 static std::vector<CYHook *> &GetHooks() {
  52     static std::vector<CYHook *> hooks;
  53     return hooks;
  54 }
  55
  56 CYRegisterHook::CYRegisterHook(CYHook *hook) {
  57     GetHooks().push_back(hook);
  58 }
  59
  60 /* JavaScript Properties {{{ */
  61 bool CYHasProperty(JSContextRef context, JSObjectRef object, JSStringRef name) {
  62     return JSObjectHasProperty(context, object, name);
  63 }
  64
  65 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, size_t index) {
  66     return _jsccall(JSObjectGetPropertyAtIndex, context, object, index);
  67 }
  68
  69 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, JSStringRef name) {
  70     return _jsccall(JSObjectGetProperty, context, object, name);
  71 }
  72
  73 void CYSetProperty(JSContextRef context, JSObjectRef object, size_t index, JSValueRef value) {
  74     _jsccall(JSObjectSetPropertyAtIndex, context, object, index, value);
  75 }
  76
  77 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef value, JSPropertyAttributes attributes) {
  78     _jsccall(JSObjectSetProperty, context, object, name, value, attributes);
  79 }
  80
  81 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef (*callback)(JSContextRef, JSObjectRef, JSObjectRef, size_t, const JSValueRef[], JSValueRef *), JSPropertyAttributes attributes) {
  82     CYSetProperty(context, object, name, JSObjectMakeFunctionWithCallback(context, name, callback), attributes);
  83 }
  84
  85 void CYSetPrototype(JSContextRef context, JSObjectRef object, JSValueRef value) {
  86     JSObjectSetPrototype(context, object, value);
  87     _assert(CYIsStrictEqual(context, JSObjectGetPrototype(context, object), value));
  88 }
  89 /* }}} */
  90 /* JavaScript Strings {{{ */
  91 JSStringRef CYCopyJSString(const char *value) {
  92     return value == NULL ? NULL : JSStringCreateWithUTF8CString(value);
  93 }
  94
  95 JSStringRef CYCopyJSString(JSStringRef value) {
  96     return value == NULL ? NULL : JSStringRetain(value);
  97 }
  98
  99 JSStringRef CYCopyJSString(CYUTF8String value) {
 100     // XXX: this is very wrong; it needs to convert to UTF16 and then create from there
 101     return CYCopyJSString(value.data);
 102 }
 103
 104 JSStringRef CYCopyJSString(JSContextRef context, JSValueRef value) {
 105     if (JSValueIsNull(context, value))
 106         return NULL;
 107     return _jsccall(JSValueToStringCopy, context, value);
 108 }
 109
 110 static CYUTF16String CYCastUTF16String(JSStringRef value) {
 111     return CYUTF16String(JSStringGetCharactersPtr(value), JSStringGetLength(value));
 112 }
 113
 114 CYUTF8String CYPoolUTF8String(CYPool &pool, JSContextRef context, JSStringRef value) {
 115     return CYPoolUTF8String(pool, CYCastUTF16String(value));
 116 }
 117
 118 const char *CYPoolCString(CYPool &pool, JSContextRef context, JSStringRef value) {
 119     CYUTF8String utf8(CYPoolUTF8String(pool, context, value));
 120     _assert(memchr(utf8.data, '\0', utf8.size) == NULL);
 121     return utf8.data;
 122 }
 123
 124 const char *CYPoolCString(CYPool &pool, JSContextRef context, JSValueRef value) {
 125     return JSValueIsNull(context, value) ? NULL : CYPoolCString(pool, context, CYJSString(context, value));
 126 }
 127 /* }}} */
 128 /* Index Offsets {{{ */
 129 size_t CYGetIndex(CYPool &pool, JSContextRef context, JSStringRef value) {
 130     return CYGetIndex(CYPoolUTF8String(pool, context, value));
 131 }
 132 /* }}} */
 133
 134 static JSClassRef All_;
 135 static JSClassRef Context_;
 136 JSClassRef Functor_;
 137 static JSClassRef Global_;
 138 static JSClassRef Pointer_;
 139 static JSClassRef Struct_;
 140
 141 JSStringRef Array_s;
 142 JSStringRef cy_s;
 143 JSStringRef cyi_s;
 144 JSStringRef length_s;
 145 JSStringRef message_s;
 146 JSStringRef name_s;
 147 JSStringRef pop_s;
 148 JSStringRef prototype_s;
 149 JSStringRef push_s;
 150 JSStringRef splice_s;
 151 JSStringRef toCYON_s;
 152 JSStringRef toJSON_s;
 153 JSStringRef toPointer_s;
 154 JSStringRef toString_s;
 155 JSStringRef weak_s;
 156
 157 static JSStringRef Result_;
 158
 159 void CYFinalize(JSObjectRef object) {
 160     CYData *internal(reinterpret_cast<CYData *>(JSObjectGetPrivate(object)));
 161     _assert(internal->count_ != _not(unsigned));
 162     if (--internal->count_ == 0)
 163         delete internal;
 164 }
 165
 166 void Structor_(CYPool &pool, sig::Type *&type) {
 167     if (
 168         type->primitive == sig::pointer_P &&
 169         type->data.data.type->primitive == sig::struct_P &&
 170         type->data.data.type->name != NULL &&
 171         strcmp(type->data.data.type->name, "_objc_class") == 0
 172     ) {
 173         type->primitive = sig::typename_P;
 174         type->data.data.type = NULL;
 175         return;
 176     }
 177
 178     if (type->primitive != sig::struct_P || type->name == NULL)
 179         return;
 180
 181     size_t length(strlen(type->name));
 182     char keyed[length + 2];
 183     memcpy(keyed + 1, type->name, length + 1);
 184
 185     static const char *modes = "34";
 186     for (size_t i(0); i != 2; ++i) {
 187         char mode(modes[i]);
 188         keyed[0] = mode;
 189
 190         if (CYBridgeEntry *entry = CYBridgeHash(keyed, length + 1))
 191             switch (mode) {
 192                 case '3':
 193                     sig::Parse(pool, &type->data.signature, entry->value_, &Structor_);
 194                 break;
 195
 196                 case '4': {
 197                     sig::Signature signature;
 198                     sig::Parse(pool, &signature, entry->value_, &Structor_);
 199                     type = signature.elements[0].type;
 200                 } break;
 201             }
 202     }
 203 }
 204
 205 JSClassRef Type_privateData::Class_;
 206
 207 struct Context :
 208     CYData
 209 {
 210     JSGlobalContextRef context_;
 211
 212     Context(JSGlobalContextRef context) :
 213         context_(context)
 214     {
 215     }
 216 };
 217
 218 struct Pointer :
 219     CYOwned
 220 {
 221     Type_privateData *type_;
 222     size_t length_;
 223
 224     Pointer(void *value, JSContextRef context, JSObjectRef owner, size_t length, sig::Type *type) :
 225         CYOwned(value, context, owner),
 226         type_(new(*pool_) Type_privateData(type)),
 227         length_(length)
 228     {
 229     }
 230 };
 231
 232 struct Struct_privateData :
 233     CYOwned
 234 {
 235     Type_privateData *type_;
 236
 237     Struct_privateData(JSContextRef context, JSObjectRef owner) :
 238         CYOwned(NULL, context, owner)
 239     {
 240     }
 241 };
 242
 243 JSObjectRef CYMakeStruct(JSContextRef context, void *data, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 244     Struct_privateData *internal(new Struct_privateData(context, owner));
 245     CYPool &pool(*internal->pool_);
 246     Type_privateData *typical(new(pool) Type_privateData(type, ffi));
 247     internal->type_ = typical;
 248
 249     if (owner != NULL)
 250         internal->value_ = data;
 251     else {
 252         size_t size(typical->GetFFI()->size);
 253         void *copy(internal->pool_->malloc<void>(size));
 254         memcpy(copy, data, size);
 255         internal->value_ = copy;
 256     }
 257
 258     return JSObjectMake(context, Struct_, internal);
 259 }
 260
 261 static void *CYCastSymbol(const char *name) {
 262     for (CYHook *hook : GetHooks())
 263         if (hook->CastSymbol != NULL)
 264             if (void *value = (*hook->CastSymbol)(name))
 265                 return value;
 266     return dlsym(RTLD_DEFAULT, name);
 267 }
 268
 269 JSValueRef CYCastJSValue(JSContextRef context, bool value) {
 270     return JSValueMakeBoolean(context, value);
 271 }
 272
 273 JSValueRef CYCastJSValue(JSContextRef context, double value) {
 274     return JSValueMakeNumber(context, value);
 275 }
 276
 277 #define CYCastJSValue_(Type_) \
 278     JSValueRef CYCastJSValue(JSContextRef context, Type_ value) { \
 279         return JSValueMakeNumber(context, static_cast<double>(value)); \
 280     }
 281
 282 CYCastJSValue_(int)
 283 CYCastJSValue_(unsigned int)
 284 CYCastJSValue_(long int)
 285 CYCastJSValue_(long unsigned int)
 286 CYCastJSValue_(long long int)
 287 CYCastJSValue_(long long unsigned int)
 288
 289 JSValueRef CYJSUndefined(JSContextRef context) {
 290     return JSValueMakeUndefined(context);
 291 }
 292
 293 double CYCastDouble(JSContextRef context, JSValueRef value) {
 294     return _jsccall(JSValueToNumber, context, value);
 295 }
 296
 297 bool CYCastBool(JSContextRef context, JSValueRef value) {
 298     return JSValueToBoolean(context, value);
 299 }
 300
 301 JSValueRef CYJSNull(JSContextRef context) {
 302     return JSValueMakeNull(context);
 303 }
 304
 305 JSValueRef CYCastJSValue(JSContextRef context, JSStringRef value) {
 306     return value == NULL ? CYJSNull(context) : JSValueMakeString(context, value);
 307 }
 308
 309 JSValueRef CYCastJSValue(JSContextRef context, const char *value) {
 310     return CYCastJSValue(context, CYJSString(value));
 311 }
 312
 313 JSObjectRef CYCastJSObject(JSContextRef context, JSValueRef value) {
 314     return _jsccall(JSValueToObject, context, value);
 315 }
 316
 317 JSValueRef CYCallAsFunction(JSContextRef context, JSObjectRef function, JSObjectRef _this, size_t count, const JSValueRef arguments[]) {
 318     return _jsccall(JSObjectCallAsFunction, context, function, _this, count, arguments);
 319 }
 320
 321 bool CYIsCallable(JSContextRef context, JSValueRef value) {
 322     return value != NULL && JSValueIsObject(context, value) && JSObjectIsFunction(context, (JSObjectRef) value);
 323 }
 324
 325 bool CYIsEqual(JSContextRef context, JSValueRef lhs, JSValueRef rhs) {
 326     return _jsccall(JSValueIsEqual, context, lhs, rhs);
 327 }
 328
 329 bool CYIsStrictEqual(JSContextRef context, JSValueRef lhs, JSValueRef rhs) {
 330     return JSValueIsStrictEqual(context, lhs, rhs);
 331 }
 332
 333 size_t CYArrayLength(JSContextRef context, JSObjectRef array) {
 334     return CYCastDouble(context, CYGetProperty(context, array, length_s));
 335 }
 336
 337 JSValueRef CYArrayGet(JSContextRef context, JSObjectRef array, size_t index) {
 338     return _jsccall(JSObjectGetPropertyAtIndex, context, array, index);
 339 }
 340
 341 void CYArrayPush(JSContextRef context, JSObjectRef array, JSValueRef value) {
 342     JSValueRef arguments[1];
 343     arguments[0] = value;
 344     JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array_prototype")));
 345     _jsccall(JSObjectCallAsFunction, context, CYCastJSObject(context, CYGetProperty(context, Array, push_s)), array, 1, arguments);
 346 }
 347
 348 static JSValueRef System_print(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 349     FILE *file(stdout);
 350
 351     if (count == 0)
 352         fputc('\n', file);
 353     else {
 354         CYPool pool;
 355         CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, arguments[0])));
 356         fwrite(string.data, string.size, 1, file);
 357     }
 358
 359     fflush(file);
 360     return CYJSUndefined(context);
 361 } CYCatch(NULL) }
 362
 363 static void (*JSSynchronousGarbageCollectForDebugging$)(JSContextRef);
 364
 365 _visible void CYGarbageCollect(JSContextRef context) {
 366     (JSSynchronousGarbageCollectForDebugging$ ?: &JSGarbageCollect)(context);
 367 }
 368
 369 static JSValueRef Cycript_compile_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 370     CYPool pool;
 371     CYUTF8String before(CYPoolUTF8String(pool, context, CYJSString(context, arguments[0])));
 372     std::stringstream value(std::string(before.data, before.size));
 373     CYUTF8String after(CYPoolCode(pool, value));
 374     return CYCastJSValue(context, CYJSString(after));
 375 } CYCatch_(NULL, "SyntaxError") }
 376
 377 static JSValueRef Cycript_gc_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 378     CYGarbageCollect(context);
 379     return CYJSUndefined(context);
 380 } CYCatch(NULL) }
 381
 382 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSValueRef value, std::set<void *> &objects, JSValueRef *exception) { CYTry {
 383     switch (JSType type = JSValueGetType(context, value)) {
 384         case kJSTypeUndefined:
 385             return "undefined";
 386         case kJSTypeNull:
 387             return "null";
 388         case kJSTypeBoolean:
 389             return CYCastBool(context, value) ? "true" : "false";
 390
 391         case kJSTypeNumber: {
 392             std::ostringstream str;
 393             CYNumerify(str, CYCastDouble(context, value));
 394             std::string value(str.str());
 395             return pool.strmemdup(value.c_str(), value.size());
 396         } break;
 397
 398         case kJSTypeString: {
 399             std::ostringstream str;
 400             CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, value)));
 401             CYStringify(str, string.data, string.size);
 402             std::string value(str.str());
 403             return pool.strmemdup(value.c_str(), value.size());
 404         } break;
 405
 406         case kJSTypeObject:
 407             return CYPoolCCYON(pool, context, (JSObjectRef) value, objects);
 408         default:
 409             throw CYJSError(context, "JSValueGetType() == 0x%x", type);
 410     }
 411 } CYCatch(NULL) }
 412
 413 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSValueRef value, std::set<void *> &objects) {
 414     return _jsccall(CYPoolCCYON, pool, context, value, objects);
 415 }
 416
 417 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSValueRef value, std::set<void *> *objects) {
 418     if (objects != NULL)
 419         return CYPoolCCYON(pool, context, value, *objects);
 420     else {
 421         std::set<void *> objects;
 422         return CYPoolCCYON(pool, context, value, objects);
 423     }
 424 }
 425
 426 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSObjectRef object, std::set<void *> &objects) {
 427     JSValueRef toCYON(CYGetProperty(context, object, toCYON_s));
 428     if (CYIsCallable(context, toCYON)) {
 429         // XXX: this needs to be abstracted behind some kind of function
 430         JSValueRef arguments[1] = {CYCastJSValue(context, reinterpret_cast<uintptr_t>(&objects))};
 431         JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toCYON, object, 1, arguments));
 432         _assert(value != NULL);
 433         return CYPoolCString(pool, context, value);
 434     }
 435
 436     JSValueRef toJSON(CYGetProperty(context, object, toJSON_s));
 437     if (CYIsCallable(context, toJSON)) {
 438         JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 439         return _jsccall(CYPoolCCYON, pool, context, CYCallAsFunction(context, (JSObjectRef) toJSON, object, 1, arguments), objects);
 440     }
 441
 442     if (JSObjectIsFunction(context, object)) {
 443         JSValueRef toString(CYGetProperty(context, object, toString_s));
 444         if (CYIsCallable(context, toString)) {
 445             JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 446             JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toString, object, 1, arguments));
 447             _assert(value != NULL);
 448             return CYPoolCString(pool, context, value);
 449         }
 450     }
 451
 452     _assert(objects.insert(object).second);
 453
 454     std::ostringstream str;
 455
 456     str << '{';
 457
 458     // XXX: this is, sadly, going to leak
 459     JSPropertyNameArrayRef names(JSObjectCopyPropertyNames(context, object));
 460
 461     bool comma(false);
 462
 463     for (size_t index(0), count(JSPropertyNameArrayGetCount(names)); index != count; ++index) {
 464         if (comma)
 465             str << ',';
 466         else
 467             comma = true;
 468
 469         JSStringRef name(JSPropertyNameArrayGetNameAtIndex(names, index));
 470         CYUTF8String string(CYPoolUTF8String(pool, context, name));
 471
 472         if (CYIsKey(string))
 473             str << string.data;
 474         else
 475             CYStringify(str, string.data, string.size);
 476
 477         str << ':';
 478
 479         try {
 480             JSValueRef value(CYGetProperty(context, object, name));
 481             str << CYPoolCCYON(pool, context, value, objects);
 482         } catch (const CYException &error) {
 483             str << "@error";
 484         }
 485     }
 486
 487     JSPropertyNameArrayRelease(names);
 488
 489     str << '}';
 490
 491     std::string string(str.str());
 492     return pool.strmemdup(string.c_str(), string.size());
 493 }
 494
 495 std::set<void *> *CYCastObjects(JSContextRef context, JSObjectRef _this, size_t count, const JSValueRef arguments[]) {
 496     if (count == 0)
 497         return NULL;
 498     return CYCastPointer<std::set<void *> *>(context, arguments[0]);
 499 }
 500
 501 static JSValueRef Array_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 502     std::set<void *> *objects(CYCastObjects(context, _this, count, arguments));
 503     // XXX: this is horribly inefficient
 504     std::set<void *> backup;
 505     if (objects == NULL)
 506         objects = &backup;
 507
 508     CYPool pool;
 509     std::ostringstream str;
 510
 511     str << '[';
 512
 513     JSValueRef length(CYGetProperty(context, _this, length_s));
 514     bool comma(false);
 515
 516     for (size_t index(0), count(CYCastDouble(context, length)); index != count; ++index) {
 517         if (comma)
 518             str << ',';
 519         else
 520             comma = true;
 521
 522         try {
 523             JSValueRef value(CYGetProperty(context, _this, index));
 524             if (!JSValueIsUndefined(context, value))
 525                 str << CYPoolCCYON(pool, context, value, *objects);
 526             else {
 527                 str << ',';
 528                 comma = false;
 529             }
 530         } catch (const CYException &error) {
 531             str << "@error";
 532         }
 533     }
 534
 535     str << ']';
 536
 537     std::string value(str.str());
 538     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 539 } CYCatch(NULL) }
 540
 541 static JSValueRef Error_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 542     CYPool pool;
 543     std::ostringstream str;
 544
 545     str << "new " << CYPoolUTF8String(pool, context, CYJSString(context, CYGetProperty(context, _this, name_s))) << "(";
 546
 547     CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, CYGetProperty(context, _this, message_s))));
 548     CYStringify(str, string.data, string.size);
 549
 550     str << ")";
 551
 552     std::string value(str.str());
 553     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 554 } CYCatch(NULL) }
 555
 556 static JSValueRef String_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 557     CYPool pool;
 558     std::ostringstream str;
 559
 560     CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, _this)));
 561     CYStringify(str, string.data, string.size);
 562
 563     std::string value(str.str());
 564     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 565 } CYCatch(NULL) }
 566
 567 JSObjectRef CYMakePointer(JSContextRef context, void *pointer, size_t length, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 568     Pointer *internal(new Pointer(pointer, context, owner, length, type));
 569     return JSObjectMake(context, Pointer_, internal);
 570 }
 571
 572 static JSObjectRef CYMakeFunctor(JSContextRef context, void (*function)(), const sig::Signature &signature) {
 573     return JSObjectMake(context, Functor_, new cy::Functor(signature, function));
 574 }
 575
 576 static JSObjectRef CYMakeFunctor(JSContextRef context, const char *symbol, const char *encoding, void **cache) {
 577     cy::Functor *internal;
 578     if (*cache != NULL)
 579         internal = reinterpret_cast<cy::Functor *>(*cache);
 580     else {
 581         void (*function)()(reinterpret_cast<void (*)()>(CYCastSymbol(symbol)));
 582         if (function == NULL)
 583             return NULL;
 584
 585         internal = new cy::Functor(encoding, function);
 586         *cache = internal;
 587     }
 588
 589     ++internal->count_;
 590     return JSObjectMake(context, Functor_, internal);
 591 }
 592
 593 static bool CYGetOffset(CYPool &pool, JSContextRef context, JSStringRef value, ssize_t &index) {
 594     return CYGetOffset(CYPoolCString(pool, context, value), index);
 595 }
 596
 597 void *CYCastPointer_(JSContextRef context, JSValueRef value) {
 598     if (value == NULL)
 599         return NULL;
 600     else switch (JSValueGetType(context, value)) {
 601         case kJSTypeNull:
 602             return NULL;
 603         case kJSTypeObject: {
 604             JSObjectRef object((JSObjectRef) value);
 605             if (JSValueIsObjectOfClass(context, value, Pointer_)) {
 606                 Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 607                 return internal->value_;
 608             }
 609             JSValueRef toPointer(CYGetProperty(context, object, toPointer_s));
 610             if (CYIsCallable(context, toPointer)) {
 611                 JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toPointer, object, 0, NULL));
 612                 _assert(value != NULL);
 613                 return CYCastPointer_(context, value);
 614             }
 615         } default:
 616             double number(CYCastDouble(context, value));
 617             if (std::isnan(number))
 618                 throw CYJSError(context, "cannot convert value to pointer");
 619             return reinterpret_cast<void *>(static_cast<uintptr_t>(static_cast<long long>(number)));
 620     }
 621 }
 622
 623 void CYPoolFFI(CYPool *pool, JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, JSValueRef value) {
 624     switch (type->primitive) {
 625         case sig::boolean_P:
 626             *reinterpret_cast<bool *>(data) = JSValueToBoolean(context, value);
 627         break;
 628
 629 #define CYPoolFFI_(primitive, native) \
 630         case sig::primitive ## _P: \
 631             *reinterpret_cast<native *>(data) = CYCastDouble(context, value); \
 632         break;
 633
 634         CYPoolFFI_(uchar, unsigned char)
 635         CYPoolFFI_(char, char)
 636         CYPoolFFI_(ushort, unsigned short)
 637         CYPoolFFI_(short, short)
 638         CYPoolFFI_(ulong, unsigned long)
 639         CYPoolFFI_(long, long)
 640         CYPoolFFI_(uint, unsigned int)
 641         CYPoolFFI_(int, int)
 642         CYPoolFFI_(ulonglong, unsigned long long)
 643         CYPoolFFI_(longlong, long long)
 644         CYPoolFFI_(float, float)
 645         CYPoolFFI_(double, double)
 646
 647         case sig::array_P: {
 648             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 649             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 650             for (size_t index(0); index != type->data.data.size; ++index) {
 651                 ffi_type *field(ffi->elements[index]);
 652
 653                 JSValueRef rhs;
 654                 if (aggregate == NULL)
 655                     rhs = value;
 656                 else {
 657                     rhs = CYGetProperty(context, aggregate, index);
 658                     if (JSValueIsUndefined(context, rhs))
 659                         throw CYJSError(context, "unable to extract array value");
 660                 }
 661
 662                 CYPoolFFI(pool, context, type->data.data.type, field, base, rhs);
 663                 // XXX: alignment?
 664                 base += field->size;
 665             }
 666         } break;
 667
 668         case sig::pointer_P:
 669             *reinterpret_cast<void **>(data) = CYCastPointer<void *>(context, value);
 670         break;
 671
 672         case sig::string_P:
 673             _assert(pool != NULL);
 674             *reinterpret_cast<const char **>(data) = CYPoolCString(*pool, context, value);
 675         break;
 676
 677         case sig::struct_P: {
 678             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 679             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 680             for (size_t index(0); index != type->data.signature.count; ++index) {
 681                 sig::Element *element(&type->data.signature.elements[index]);
 682                 ffi_type *field(ffi->elements[index]);
 683
 684                 JSValueRef rhs;
 685                 if (aggregate == NULL)
 686                     rhs = value;
 687                 else {
 688                     rhs = CYGetProperty(context, aggregate, index);
 689                     if (JSValueIsUndefined(context, rhs)) {
 690                         if (element->name != NULL)
 691                             rhs = CYGetProperty(context, aggregate, CYJSString(element->name));
 692                         else
 693                             goto undefined;
 694                         if (JSValueIsUndefined(context, rhs)) undefined:
 695                             throw CYJSError(context, "unable to extract structure value");
 696                     }
 697                 }
 698
 699                 CYPoolFFI(pool, context, element->type, field, base, rhs);
 700                 // XXX: alignment?
 701                 base += field->size;
 702             }
 703         } break;
 704
 705         case sig::void_P:
 706         break;
 707
 708         default:
 709             for (CYHook *hook : GetHooks())
 710                 if (hook->PoolFFI != NULL)
 711                     if ((*hook->PoolFFI)(pool, context, type, ffi, data, value))
 712                         return;
 713
 714             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 715     }
 716 }
 717
 718 JSValueRef CYFromFFI(JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, bool initialize, JSObjectRef owner) {
 719     switch (type->primitive) {
 720         case sig::boolean_P:
 721             return CYCastJSValue(context, *reinterpret_cast<bool *>(data));
 722
 723 #define CYFromFFI_(primitive, native) \
 724         case sig::primitive ## _P: \
 725             return CYCastJSValue(context, *reinterpret_cast<native *>(data)); \
 726
 727         CYFromFFI_(uchar, unsigned char)
 728         CYFromFFI_(char, char)
 729         CYFromFFI_(ushort, unsigned short)
 730         CYFromFFI_(short, short)
 731         CYFromFFI_(ulong, unsigned long)
 732         CYFromFFI_(long, long)
 733         CYFromFFI_(uint, unsigned int)
 734         CYFromFFI_(int, int)
 735         CYFromFFI_(ulonglong, unsigned long long)
 736         CYFromFFI_(longlong, long long)
 737         CYFromFFI_(float, float)
 738         CYFromFFI_(double, double)
 739
 740         case sig::array_P:
 741             if (void *pointer = data)
 742                 return CYMakePointer(context, pointer, type->data.data.size, type->data.data.type, NULL, owner);
 743             else goto null;
 744
 745         case sig::pointer_P:
 746             if (void *pointer = *reinterpret_cast<void **>(data))
 747                 return CYMakePointer(context, pointer, _not(size_t), type->data.data.type, NULL, owner);
 748             else goto null;
 749
 750         case sig::string_P:
 751             if (char *utf8 = *reinterpret_cast<char **>(data))
 752                 return CYCastJSValue(context, utf8);
 753             else goto null;
 754
 755         case sig::struct_P:
 756             return CYMakeStruct(context, data, type, ffi, owner);
 757         case sig::void_P:
 758             return CYJSUndefined(context);
 759
 760         null:
 761             return CYJSNull(context);
 762         default:
 763             for (CYHook *hook : GetHooks())
 764                 if (hook->FromFFI != NULL)
 765                     if (JSValueRef value = (*hook->FromFFI)(context, type, ffi, data, initialize, owner))
 766                         return value;
 767
 768             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 769     }
 770 }
 771
 772 void CYExecuteClosure(ffi_cif *cif, void *result, void **arguments, void *arg) {
 773     Closure_privateData *internal(reinterpret_cast<Closure_privateData *>(arg));
 774
 775     JSContextRef context(internal->context_);
 776
 777     size_t count(internal->cif_.nargs);
 778     JSValueRef values[count];
 779
 780     for (size_t index(0); index != count; ++index)
 781         values[index] = CYFromFFI(context, internal->signature_.elements[1 + index].type, internal->cif_.arg_types[index], arguments[index]);
 782
 783     JSValueRef value(internal->adapter_(context, count, values, internal->function_));
 784     CYPoolFFI(NULL, context, internal->signature_.elements[0].type, internal->cif_.rtype, result, value);
 785 }
 786
 787 static JSValueRef FunctionAdapter_(JSContextRef context, size_t count, JSValueRef values[], JSObjectRef function) {
 788     return CYCallAsFunction(context, function, NULL, count, values);
 789 }
 790
 791 Closure_privateData *CYMakeFunctor_(JSContextRef context, JSObjectRef function, const sig::Signature &signature, JSValueRef (*adapter)(JSContextRef, size_t, JSValueRef[], JSObjectRef)) {
 792     // XXX: in case of exceptions this will leak
 793     // XXX: in point of fact, this may /need/ to leak :(
 794     Closure_privateData *internal(new Closure_privateData(context, function, adapter, signature));
 795
 796 #if defined(__APPLE__) && (defined(__arm__) || defined(__arm64__))
 797     void *executable;
 798     ffi_closure *writable(reinterpret_cast<ffi_closure *>(ffi_closure_alloc(sizeof(ffi_closure), &executable)));
 799
 800     ffi_status status(ffi_prep_closure_loc(writable, &internal->cif_, &CYExecuteClosure, internal, executable));
 801     _assert(status == FFI_OK);
 802
 803     internal->value_ = executable;
 804 #else
 805     ffi_closure *closure((ffi_closure *) _syscall(mmap(
 806         NULL, sizeof(ffi_closure),
 807         PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE,
 808         -1, 0
 809     )));
 810
 811     ffi_status status(ffi_prep_closure(closure, &internal->cif_, &CYExecuteClosure, internal));
 812     _assert(status == FFI_OK);
 813
 814     _syscall(mprotect(closure, sizeof(*closure), PROT_READ | PROT_EXEC));
 815
 816     internal->value_ = closure;
 817 #endif
 818
 819     return internal;
 820 }
 821
 822 static JSObjectRef CYMakeFunctor(JSContextRef context, JSObjectRef function, const sig::Signature &signature) {
 823     Closure_privateData *internal(CYMakeFunctor_(context, function, signature, &FunctionAdapter_));
 824     JSObjectRef object(JSObjectMake(context, Functor_, internal));
 825     // XXX: see above notes about needing to leak
 826     JSValueProtect(CYGetJSContext(context), object);
 827     return object;
 828 }
 829
 830 JSValueRef CYGetCachedValue(JSContextRef context, JSStringRef name) {
 831     return CYGetProperty(context, CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s)), name);
 832 }
 833
 834 JSObjectRef CYGetCachedObject(JSContextRef context, JSStringRef name) {
 835     return CYCastJSObject(context, CYGetCachedValue(context, name));
 836 }
 837
 838 static JSObjectRef CYMakeFunctor(JSContextRef context, JSValueRef value, const sig::Signature &signature) {
 839     JSObjectRef Function(CYGetCachedObject(context, CYJSString("Function")));
 840
 841     bool function(_jsccall(JSValueIsInstanceOfConstructor, context, value, Function));
 842     if (function) {
 843         JSObjectRef function(CYCastJSObject(context, value));
 844         return CYMakeFunctor(context, function, signature);
 845     } else {
 846         void (*function)()(CYCastPointer<void (*)()>(context, value));
 847         return CYMakeFunctor(context, function, signature);
 848     }
 849 }
 850
 851 static bool Index_(CYPool &pool, JSContextRef context, Struct_privateData *internal, JSStringRef property, ssize_t &index, uint8_t *&base) {
 852     Type_privateData *typical(internal->type_);
 853     sig::Type *type(typical->type_);
 854     if (type == NULL)
 855         return false;
 856
 857     const char *name(CYPoolCString(pool, context, property));
 858     size_t length(strlen(name));
 859     double number(CYCastDouble(name, length));
 860
 861     size_t count(type->data.signature.count);
 862
 863     if (std::isnan(number)) {
 864         if (property == NULL)
 865             return false;
 866
 867         sig::Element *elements(type->data.signature.elements);
 868
 869         for (size_t local(0); local != count; ++local) {
 870             sig::Element *element(&elements[local]);
 871             if (element->name != NULL && strcmp(name, element->name) == 0) {
 872                 index = local;
 873                 goto base;
 874             }
 875         }
 876
 877         return false;
 878     } else {
 879         index = static_cast<ssize_t>(number);
 880         if (index != number || index < 0 || static_cast<size_t>(index) >= count)
 881             return false;
 882     }
 883
 884   base:
 885     ffi_type **elements(typical->GetFFI()->elements);
 886
 887     base = reinterpret_cast<uint8_t *>(internal->value_);
 888     for (ssize_t local(0); local != index; ++local)
 889         base += elements[local]->size;
 890
 891     return true;
 892 }
 893
 894 static JSValueRef Pointer_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 895     CYPool pool;
 896     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 897
 898     if (JSStringIsEqual(property, length_s))
 899         return internal->length_ == _not(size_t) ? CYJSUndefined(context) : CYCastJSValue(context, internal->length_);
 900
 901     Type_privateData *typical(internal->type_);
 902     if (typical->type_ == NULL)
 903         return NULL;
 904     sig::Type &type(*typical->type_);
 905
 906     ssize_t offset;
 907     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 908         offset = 0;
 909     else if (!CYGetOffset(pool, context, property, offset))
 910         return NULL;
 911
 912     if (type.primitive == sig::function_P)
 913         return CYMakeFunctor(context, reinterpret_cast<void (*)()>(internal->value_), type.data.signature);
 914
 915     ffi_type *ffi(typical->GetFFI());
 916
 917     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 918     base += ffi->size * offset;
 919
 920     JSObjectRef owner(internal->GetOwner() ?: object);
 921     return CYFromFFI(context, &type, ffi, base, false, owner);
 922 } CYCatch(NULL) }
 923
 924 static bool Pointer_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 925     CYPool pool;
 926     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 927     Type_privateData *typical(internal->type_);
 928
 929     if (typical->type_ == NULL)
 930         return false;
 931
 932     ssize_t offset;
 933     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 934         offset = 0;
 935     else if (!CYGetOffset(pool, context, property, offset))
 936         return false;
 937
 938     ffi_type *ffi(typical->GetFFI());
 939
 940     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 941     base += ffi->size * offset;
 942
 943     CYPoolFFI(NULL, context, typical->type_, ffi, base, value);
 944     return true;
 945 } CYCatch(false) }
 946
 947 static JSValueRef Struct_callAsFunction_$cya(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 948     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(_this)));
 949     Type_privateData *typical(internal->type_);
 950     return CYMakePointer(context, internal->value_, _not(size_t), typical->type_, typical->ffi_, _this);
 951 } CYCatch(NULL) }
 952
 953 static JSValueRef Struct_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 954     CYPool pool;
 955     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 956     Type_privateData *typical(internal->type_);
 957
 958     ssize_t index;
 959     uint8_t *base;
 960
 961     if (!Index_(pool, context, internal, property, index, base))
 962         return NULL;
 963
 964     JSObjectRef owner(internal->GetOwner() ?: object);
 965
 966     return CYFromFFI(context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, false, owner);
 967 } CYCatch(NULL) }
 968
 969 static bool Struct_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 970     CYPool pool;
 971     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 972     Type_privateData *typical(internal->type_);
 973
 974     ssize_t index;
 975     uint8_t *base;
 976
 977     if (!Index_(pool, context, internal, property, index, base))
 978         return false;
 979
 980     CYPoolFFI(NULL, context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, value);
 981     return true;
 982 } CYCatch(false) }
 983
 984 static void Struct_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
 985     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 986     Type_privateData *typical(internal->type_);
 987     sig::Type *type(typical->type_);
 988
 989     if (type == NULL)
 990         return;
 991
 992     size_t count(type->data.signature.count);
 993     sig::Element *elements(type->data.signature.elements);
 994
 995     char number[32];
 996
 997     for (size_t index(0); index != count; ++index) {
 998         const char *name;
 999         name = elements[index].name;
1000
1001         if (name == NULL) {
1002             sprintf(number, "%zu", index);
1003             name = number;
1004         }
1005
1006         JSPropertyNameAccumulatorAddName(names, CYJSString(name));
1007     }
1008 }
1009
1010 void CYCallFunction(CYPool &pool, JSContextRef context, ffi_cif *cif, void (*function)(), void *value, void **values) {
1011     ffi_call(cif, function, value, values);
1012 }
1013
1014 JSValueRef CYCallFunction(CYPool &pool, JSContextRef context, size_t setups, void *setup[], size_t count, const JSValueRef arguments[], bool initialize, sig::Signature *signature, ffi_cif *cif, void (*function)()) {
1015     if (setups + count != signature->count - 1)
1016         throw CYJSError(context, "incorrect number of arguments to ffi function");
1017
1018     size_t size(setups + count);
1019     void *values[size];
1020     memcpy(values, setup, sizeof(void *) * setups);
1021
1022     for (size_t index(setups); index != size; ++index) {
1023         sig::Element *element(&signature->elements[index + 1]);
1024         ffi_type *ffi(cif->arg_types[index]);
1025         // XXX: alignment?
1026         values[index] = new(pool) uint8_t[ffi->size];
1027         CYPoolFFI(&pool, context, element->type, ffi, values[index], arguments[index - setups]);
1028     }
1029
1030     uint8_t value[cif->rtype->size];
1031
1032     void (*call)(CYPool &, JSContextRef, ffi_cif *, void (*)(), void *, void **) = &CYCallFunction;
1033     // XXX: this only supports one hook, but it is a bad idea anyway
1034     for (CYHook *hook : GetHooks())
1035         if (hook->CallFunction != NULL)
1036             call = hook->CallFunction;
1037
1038     call(pool, context, cif, function, value, values);
1039     return CYFromFFI(context, signature->elements[0].type, cif->rtype, value, initialize);
1040 }
1041
1042 static JSValueRef Functor_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1043     CYPool pool;
1044     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
1045     return CYCallFunction(pool, context, 0, NULL, count, arguments, false, &internal->signature_, &internal->cif_, internal->GetValue());
1046 } CYCatch(NULL) }
1047
1048 JSObjectRef CYMakeType(JSContextRef context, const char *encoding) {
1049     Type_privateData *internal(new Type_privateData(encoding));
1050     return JSObjectMake(context, Type_privateData::Class_, internal);
1051 }
1052
1053 JSObjectRef CYMakeType(JSContextRef context, sig::Type *type) {
1054     Type_privateData *internal(new Type_privateData(type));
1055     return JSObjectMake(context, Type_privateData::Class_, internal);
1056 }
1057
1058 JSObjectRef CYMakeType(JSContextRef context, sig::Signature *signature) {
1059     CYPool pool;
1060
1061     sig::Type type;
1062     type.name = NULL;
1063     type.flags = 0;
1064
1065     type.primitive = sig::function_P;
1066     sig::Copy(pool, type.data.signature, *signature);
1067
1068     return CYMakeType(context, &type);
1069 }
1070
1071 static bool All_hasProperty(JSContextRef context, JSObjectRef object, JSStringRef property) {
1072     JSObjectRef global(CYGetGlobalObject(context));
1073     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
1074     JSObjectRef alls(CYCastJSObject(context, CYGetProperty(context, cycript, CYJSString("alls"))));
1075
1076     for (size_t i(0), count(CYArrayLength(context, alls)); i != count; ++i)
1077         if (JSObjectRef space = CYCastJSObject(context, CYArrayGet(context, alls, count - i - 1)))
1078             if (CYHasProperty(context, space, property))
1079                 return true;
1080
1081     CYPool pool;
1082     CYUTF8String name(CYPoolUTF8String(pool, context, property));
1083
1084     size_t length(name.size);
1085     char keyed[length + 2];
1086     memcpy(keyed + 1, name.data, length + 1);
1087
1088     static const char *modes = "0124";
1089     for (size_t i(0); i != 4; ++i) {
1090         keyed[0] = modes[i];
1091         if (CYBridgeHash(keyed, length + 1) != NULL)
1092             return true;
1093     }
1094
1095     return false;
1096 }
1097
1098 static JSValueRef All_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1099     JSObjectRef global(CYGetGlobalObject(context));
1100     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
1101     JSObjectRef alls(CYCastJSObject(context, CYGetProperty(context, cycript, CYJSString("alls"))));
1102
1103     for (size_t i(0), count(CYArrayLength(context, alls)); i != count; ++i)
1104         if (JSObjectRef space = CYCastJSObject(context, CYArrayGet(context, alls, count - i - 1)))
1105             if (JSValueRef value = CYGetProperty(context, space, property))
1106                 if (!JSValueIsUndefined(context, value))
1107                     return value;
1108
1109     CYPool pool;
1110     CYUTF8String name(CYPoolUTF8String(pool, context, property));
1111
1112     size_t length(name.size);
1113     char keyed[length + 2];
1114     memcpy(keyed + 1, name.data, length + 1);
1115
1116     static const char *modes = "0124";
1117     for (size_t i(0); i != 4; ++i) {
1118         char mode(modes[i]);
1119         keyed[0] = mode;
1120
1121         if (CYBridgeEntry *entry = CYBridgeHash(keyed, length + 1))
1122             switch (mode) {
1123                 case '0':
1124                     return JSEvaluateScript(CYGetJSContext(context), CYJSString(entry->value_), NULL, NULL, 0, NULL);
1125
1126                 case '1':
1127                     return CYMakeFunctor(context, name.data, entry->value_, &entry->cache_);
1128
1129                 case '2':
1130                     if (void *symbol = CYCastSymbol(name.data)) {
1131                         // XXX: this is horrendously inefficient
1132                         sig::Signature signature;
1133                         sig::Parse(pool, &signature, entry->value_, &Structor_);
1134                         ffi_cif cif;
1135                         sig::sig_ffi_cif(pool, &sig::ObjectiveC, &signature, &cif);
1136                         return CYFromFFI(context, signature.elements[0].type, cif.rtype, symbol);
1137                     } else return NULL;
1138
1139                 // XXX: implement case 3
1140                 case '4':
1141                     return CYMakeType(context, entry->value_);
1142             }
1143     }
1144
1145     return NULL;
1146 } CYCatch(NULL) }
1147
1148 static void All_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
1149     JSObjectRef global(CYGetGlobalObject(context));
1150     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
1151     JSObjectRef alls(CYCastJSObject(context, CYGetProperty(context, cycript, CYJSString("alls"))));
1152
1153     for (size_t i(0), count(CYArrayLength(context, alls)); i != count; ++i)
1154         if (JSObjectRef space = CYCastJSObject(context, CYArrayGet(context, alls, count - i - 1))) {
1155             JSPropertyNameArrayRef subset(JSObjectCopyPropertyNames(context, space));
1156             for (size_t index(0), count(JSPropertyNameArrayGetCount(subset)); index != count; ++index)
1157                 JSPropertyNameAccumulatorAddName(names, JSPropertyNameArrayGetNameAtIndex(subset, index));
1158             JSPropertyNameArrayRelease(subset);
1159         }
1160 }
1161
1162 static JSObjectRef Pointer_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1163     if (count != 2)
1164         throw CYJSError(context, "incorrect number of arguments to Pointer constructor");
1165
1166     CYPool pool;
1167
1168     void *value(CYCastPointer<void *>(context, arguments[0]));
1169     const char *type(CYPoolCString(pool, context, arguments[1]));
1170
1171     sig::Signature signature;
1172     sig::Parse(pool, &signature, type, &Structor_);
1173
1174     return CYMakePointer(context, value, _not(size_t), signature.elements[0].type, NULL, NULL);
1175 } CYCatch(NULL) }
1176
1177 static JSObjectRef Type_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1178     CYPool pool;
1179
1180     if (false) {
1181     } else if (count == 1) {
1182         const char *type(CYPoolCString(pool, context, arguments[0]));
1183         return CYMakeType(context, type);
1184     } else if (count == 2) {
1185         JSObjectRef types(CYCastJSObject(context, arguments[0]));
1186         size_t count(CYArrayLength(context, types));
1187
1188         JSObjectRef names(CYCastJSObject(context, arguments[1]));
1189
1190         sig::Type type;
1191         type.name = NULL;
1192         type.flags = 0;
1193
1194         type.primitive = sig::struct_P;
1195         type.data.signature.elements = new(pool) sig::Element[count];
1196         type.data.signature.count = count;
1197
1198         for (size_t i(0); i != count; ++i) {
1199             sig::Element &element(type.data.signature.elements[i]);
1200             element.offset = _not(size_t);
1201
1202             JSValueRef name(CYArrayGet(context, names, i));
1203             if (JSValueIsUndefined(context, name))
1204                 element.name = NULL;
1205             else
1206                 element.name = CYPoolCString(pool, context, name);
1207
1208             JSObjectRef object(CYCastJSObject(context, CYArrayGet(context, types, i)));
1209             _assert(JSValueIsObjectOfClass(context, object, Type_privateData::Class_));
1210             Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1211             element.type = internal->type_;
1212         }
1213
1214         return CYMakeType(context, &type);
1215     } else {
1216         throw CYJSError(context, "incorrect number of arguments to Type constructor");
1217     }
1218 } CYCatch(NULL) }
1219
1220 static JSValueRef Type_callAsFunction_$With(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], sig::Primitive primitive, JSValueRef *exception) { CYTry {
1221     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1222
1223     CYPool pool;
1224
1225     sig::Type type;
1226     type.name = NULL;
1227     type.flags = 0;
1228
1229     type.primitive = primitive;
1230     type.data.signature.elements = new(pool) sig::Element[1 + count];
1231     type.data.signature.count = 1 + count;
1232
1233     type.data.signature.elements[0].name = NULL;
1234     type.data.signature.elements[0].type = internal->type_;
1235     type.data.signature.elements[0].offset = _not(size_t);
1236
1237     for (size_t i(0); i != count; ++i) {
1238         sig::Element &element(type.data.signature.elements[i + 1]);
1239         element.name = NULL;
1240         element.offset = _not(size_t);
1241
1242         JSObjectRef object(CYCastJSObject(context, arguments[i]));
1243         _assert(JSValueIsObjectOfClass(context, object, Type_privateData::Class_));
1244         Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1245
1246         element.type = internal->type_;
1247     }
1248
1249     return CYMakeType(context, &type);
1250 } CYCatch(NULL) }
1251
1252 static JSValueRef Type_callAsFunction_arrayOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1253     if (count != 1)
1254         throw CYJSError(context, "incorrect number of arguments to Type.arrayOf");
1255     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1256
1257     CYPool pool;
1258     size_t index(CYGetIndex(pool, context, CYJSString(context, arguments[0])));
1259     if (index == _not(size_t))
1260         throw CYJSError(context, "invalid array size used with Type.arrayOf");
1261
1262     sig::Type type;
1263     type.name = NULL;
1264     type.flags = 0;
1265
1266     type.primitive = sig::array_P;
1267     type.data.data.type = internal->type_;
1268     type.data.data.size = index;
1269
1270     return CYMakeType(context, &type);
1271 } CYCatch(NULL) }
1272
1273 static JSValueRef Type_callAsFunction_blockWith(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1274     return Type_callAsFunction_$With(context, object, _this, count, arguments, sig::block_P, exception);
1275 }
1276
1277 static JSValueRef Type_callAsFunction_constant(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1278     if (count != 0)
1279         throw CYJSError(context, "incorrect number of arguments to Type.constant");
1280     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1281
1282     sig::Type type(*internal->type_);
1283     type.flags |= JOC_TYPE_CONST;
1284     return CYMakeType(context, &type);
1285 } CYCatch(NULL) }
1286
1287 static JSValueRef Type_callAsFunction_long(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1288     if (count != 0)
1289         throw CYJSError(context, "incorrect number of arguments to Type.long");
1290     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1291
1292     sig::Type type(*internal->type_);
1293
1294     switch (type.primitive) {
1295         case sig::short_P: type.primitive = sig::int_P; break;
1296         case sig::int_P: type.primitive = sig::long_P; break;
1297         case sig::long_P: type.primitive = sig::longlong_P; break;
1298         default: throw CYJSError(context, "invalid type argument to Type.long");
1299     }
1300
1301     return CYMakeType(context, &type);
1302 } CYCatch(NULL) }
1303
1304 static JSValueRef Type_callAsFunction_short(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1305     if (count != 0)
1306         throw CYJSError(context, "incorrect number of arguments to Type.short");
1307     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1308
1309     sig::Type type(*internal->type_);
1310
1311     switch (type.primitive) {
1312         case sig::int_P: type.primitive = sig::short_P; break;
1313         case sig::long_P: type.primitive = sig::int_P; break;
1314         case sig::longlong_P: type.primitive = sig::long_P; break;
1315         default: throw CYJSError(context, "invalid type argument to Type.short");
1316     }
1317
1318     return CYMakeType(context, &type);
1319 } CYCatch(NULL) }
1320
1321 static JSValueRef Type_callAsFunction_signed(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1322     if (count != 0)
1323         throw CYJSError(context, "incorrect number of arguments to Type.signed");
1324     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1325
1326     sig::Type type(*internal->type_);
1327
1328     switch (type.primitive) {
1329         case sig::char_P: case sig::uchar_P: type.primitive = sig::char_P; break;
1330         case sig::short_P: case sig::ushort_P: type.primitive = sig::short_P; break;
1331         case sig::int_P: case sig::uint_P: type.primitive = sig::int_P; break;
1332         case sig::long_P: case sig::ulong_P: type.primitive = sig::long_P; break;
1333         case sig::longlong_P: case sig::ulonglong_P: type.primitive = sig::longlong_P; break;
1334         default: throw CYJSError(context, "invalid type argument to Type.signed");
1335     }
1336
1337     return CYMakeType(context, &type);
1338 } CYCatch(NULL) }
1339
1340 static JSValueRef Type_callAsFunction_unsigned(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1341     if (count != 0)
1342         throw CYJSError(context, "incorrect number of arguments to Type.unsigned");
1343     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1344
1345     sig::Type type(*internal->type_);
1346
1347     switch (type.primitive) {
1348         case sig::char_P: case sig::uchar_P: type.primitive = sig::uchar_P; break;
1349         case sig::short_P: case sig::ushort_P: type.primitive = sig::ushort_P; break;
1350         case sig::int_P: case sig::uint_P: type.primitive = sig::uint_P; break;
1351         case sig::long_P: case sig::ulong_P: type.primitive = sig::ulong_P; break;
1352         case sig::longlong_P: case sig::ulonglong_P: type.primitive = sig::ulonglong_P; break;
1353         default: throw CYJSError(context, "invalid type argument to Type.unsigned");
1354     }
1355
1356     return CYMakeType(context, &type);
1357 } CYCatch(NULL) }
1358
1359 static JSValueRef Type_callAsFunction_functionWith(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1360     return Type_callAsFunction_$With(context, object, _this, count, arguments, sig::function_P, exception);
1361 }
1362
1363 static JSValueRef Type_callAsFunction_pointerTo(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1364     if (count != 0)
1365         throw CYJSError(context, "incorrect number of arguments to Type.pointerTo");
1366     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1367
1368     sig::Type type;
1369     type.name = NULL;
1370
1371     if (internal->type_->primitive == sig::char_P) {
1372         type.flags = internal->type_->flags;
1373         type.primitive = sig::string_P;
1374         type.data.data.type = NULL;
1375         type.data.data.size = 0;
1376     } else {
1377         type.flags = 0;
1378         type.primitive = sig::pointer_P;
1379         type.data.data.type = internal->type_;
1380         type.data.data.size = 0;
1381     }
1382
1383     return CYMakeType(context, &type);
1384 } CYCatch(NULL) }
1385
1386 static JSValueRef Type_callAsFunction_withName(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1387     if (count != 1)
1388         throw CYJSError(context, "incorrect number of arguments to Type.withName");
1389     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1390
1391     CYPool pool;
1392     const char *name(CYPoolCString(pool, context, arguments[0]));
1393
1394     sig::Type type(*internal->type_);
1395     type.name = name;
1396     return CYMakeType(context, &type);
1397 } CYCatch(NULL) }
1398
1399 static JSValueRef Type_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1400     if (count != 1)
1401         throw CYJSError(context, "incorrect number of arguments to type cast function");
1402     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1403
1404     if (internal->type_->primitive == sig::function_P)
1405         return CYMakeFunctor(context, arguments[0], internal->type_->data.signature);
1406
1407     sig::Type *type(internal->type_);
1408     ffi_type *ffi(internal->GetFFI());
1409     // XXX: alignment?
1410     uint8_t value[ffi->size];
1411     CYPool pool;
1412     CYPoolFFI(&pool, context, type, ffi, value, arguments[0]);
1413     return CYFromFFI(context, type, ffi, value);
1414 } CYCatch(NULL) }
1415
1416 static JSObjectRef Type_callAsConstructor(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1417     if (count != 0)
1418         throw CYJSError(context, "incorrect number of arguments to Type allocator");
1419     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1420
1421     sig::Type *type(internal->type_);
1422     size_t length;
1423
1424     if (type->primitive != sig::array_P)
1425         length = _not(size_t);
1426     else {
1427         length = type->data.data.size;
1428         type = type->data.data.type;
1429     }
1430
1431     void *value(calloc(1, internal->GetFFI()->size));
1432     return CYMakePointer(context, value, length, type, NULL, NULL);
1433 } CYCatch(NULL) }
1434
1435 static JSObjectRef Functor_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1436     if (count != 2)
1437         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1438     CYPool pool;
1439     const char *encoding(CYPoolCString(pool, context, arguments[1]));
1440     sig::Signature signature;
1441     sig::Parse(pool, &signature, encoding, &Structor_);
1442     return CYMakeFunctor(context, arguments[0], signature);
1443 } CYCatch(NULL) }
1444
1445 static JSValueRef CYValue_callAsFunction_valueOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1446     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1447     return CYCastJSValue(context, reinterpret_cast<uintptr_t>(internal->value_));
1448 } CYCatch(NULL) }
1449
1450 static JSValueRef CYValue_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1451     return CYValue_callAsFunction_valueOf(context, object, _this, count, arguments, exception);
1452 }
1453
1454 static JSValueRef CYValue_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1455     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1456     char string[32];
1457     sprintf(string, "%p", internal->value_);
1458     return CYCastJSValue(context, string);
1459 } CYCatch(NULL) }
1460
1461 static JSValueRef Pointer_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1462     std::set<void *> *objects(CYCastObjects(context, _this, count, arguments));
1463
1464     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(_this)));
1465     if (internal->length_ != _not(size_t)) {
1466         JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array_prototype")));
1467         JSObjectRef toCYON(CYCastJSObject(context, CYGetProperty(context, Array, toCYON_s)));
1468         return CYCallAsFunction(context, toCYON, _this, count, arguments);
1469     } else if (internal->type_->type_ == NULL) pointer: {
1470         char string[32];
1471         sprintf(string, "%p", internal->value_);
1472         return CYCastJSValue(context, string);
1473     } try {
1474         JSValueRef value(CYGetProperty(context, _this, cyi_s));
1475         if (JSValueIsUndefined(context, value))
1476             goto pointer;
1477         CYPool pool;
1478         return CYCastJSValue(context, pool.strcat("&", CYPoolCCYON(pool, context, value, objects), NULL));
1479     } catch (const CYException &e) {
1480         goto pointer;
1481     }
1482 } CYCatch(NULL) }
1483
1484 static JSValueRef Pointer_getProperty_type(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1485     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
1486     return CYMakeType(context, internal->type_->type_);
1487 } CYCatch(NULL) }
1488
1489 static JSValueRef Functor_getProperty_type(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1490     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
1491     return CYMakeType(context, &internal->signature_);
1492 } CYCatch(NULL) }
1493
1494 static JSValueRef Type_getProperty_alignment(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1495     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1496     return CYCastJSValue(context, internal->GetFFI()->alignment);
1497 } CYCatch(NULL) }
1498
1499 static JSValueRef Type_getProperty_name(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1500     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1501     return CYCastJSValue(context, internal->type_->name);
1502 } CYCatch(NULL) }
1503
1504 static JSValueRef Type_getProperty_size(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1505     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1506     return CYCastJSValue(context, internal->GetFFI()->size);
1507 } CYCatch(NULL) }
1508
1509 static JSValueRef Type_callAsFunction_toString(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1510     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1511     CYPool pool;
1512     const char *type(sig::Unparse(pool, internal->type_));
1513     return CYCastJSValue(context, CYJSString(type));
1514 } CYCatch(NULL) }
1515
1516 static JSValueRef Type_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1517     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1518     CYLocalPool pool;
1519     std::stringbuf out;
1520     CYOptions options;
1521     CYOutput output(out, options);
1522     (new(pool) CYTypeExpression(Decode(pool, internal->type_)))->Output(output, CYNoFlags);
1523     return CYCastJSValue(context, CYJSString(out.str().c_str()));
1524 } CYCatch(NULL) }
1525
1526 static JSValueRef Type_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1527     return Type_callAsFunction_toString(context, object, _this, count, arguments, exception);
1528 }
1529
1530 static JSStaticFunction Pointer_staticFunctions[4] = {
1531     {"toCYON", &Pointer_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1532     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1533     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1534     {NULL, NULL, 0}
1535 };
1536
1537 static JSStaticValue Pointer_staticValues[2] = {
1538     {"type", &Pointer_getProperty_type, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1539     {NULL, NULL, NULL, 0}
1540 };
1541
1542 static JSStaticFunction Struct_staticFunctions[2] = {
1543     {"$cya", &Struct_callAsFunction_$cya, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1544     {NULL, NULL, 0}
1545 };
1546
1547 static JSStaticFunction Functor_staticFunctions[4] = {
1548     {"toCYON", &CYValue_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1549     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1550     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1551     {NULL, NULL, 0}
1552 };
1553
1554 namespace cy {
1555     JSStaticFunction const * const Functor::StaticFunctions = Functor_staticFunctions;
1556 }
1557
1558 static JSStaticValue Functor_staticValues[2] = {
1559     {"type", &Functor_getProperty_type, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1560     {NULL, NULL, NULL, 0}
1561 };
1562
1563 namespace cy {
1564     JSStaticValue const * const Functor::StaticValues = Functor_staticValues;
1565 }
1566
1567 static JSStaticValue Type_staticValues[4] = {
1568     {"alignment", &Type_getProperty_alignment, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1569     {"name", &Type_getProperty_name, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1570     {"size", &Type_getProperty_size, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1571     {NULL, NULL, NULL, 0}
1572 };
1573
1574 static JSStaticFunction Type_staticFunctions[14] = {
1575     {"arrayOf", &Type_callAsFunction_arrayOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1576     {"blockWith", &Type_callAsFunction_blockWith, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1577     {"constant", &Type_callAsFunction_constant, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1578     {"functionWith", &Type_callAsFunction_functionWith, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1579     {"long", &Type_callAsFunction_long, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1580     {"pointerTo", &Type_callAsFunction_pointerTo, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1581     {"short", &Type_callAsFunction_short, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1582     {"signed", &Type_callAsFunction_signed, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1583     {"withName", &Type_callAsFunction_withName, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1584     {"toCYON", &Type_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1585     {"toJSON", &Type_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1586     {"toString", &Type_callAsFunction_toString, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1587     {"unsigned", &Type_callAsFunction_unsigned, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1588     {NULL, NULL, 0}
1589 };
1590
1591 static JSObjectRef (*JSObjectMakeArray$)(JSContextRef, size_t, const JSValueRef[], JSValueRef *);
1592
1593 _visible void CYSetArgs(int argc, const char *argv[]) {
1594     JSContextRef context(CYGetJSContext());
1595     JSValueRef args[argc];
1596     for (int i(0); i != argc; ++i)
1597         args[i] = CYCastJSValue(context, argv[i]);
1598
1599     JSObjectRef array;
1600     if (JSObjectMakeArray$ != NULL)
1601         array = _jsccall(*JSObjectMakeArray$, context, argc, args);
1602     else {
1603         JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array")));
1604         JSValueRef value(CYCallAsFunction(context, Array, NULL, argc, args));
1605         array = CYCastJSObject(context, value);
1606     }
1607
1608     JSObjectRef System(CYGetCachedObject(context, CYJSString("System")));
1609     CYSetProperty(context, System, CYJSString("args"), array);
1610 }
1611
1612 JSObjectRef CYGetGlobalObject(JSContextRef context) {
1613     return JSContextGetGlobalObject(context);
1614 }
1615
1616 // XXX: this is neither exceptin safe nor even terribly sane
1617 class ExecutionHandle {
1618   private:
1619     JSContextRef context_;
1620     std::vector<void *> handles_;
1621
1622   public:
1623     ExecutionHandle(JSContextRef context) :
1624         context_(context)
1625     {
1626         handles_.resize(GetHooks().size());
1627         for (size_t i(0); i != GetHooks().size(); ++i) {
1628             CYHook *hook(GetHooks()[i]);
1629             if (hook->ExecuteStart != NULL)
1630                 handles_[i] = (*hook->ExecuteStart)(context_);
1631             else
1632                 handles_[i] = NULL;
1633         }
1634     }
1635
1636     ~ExecutionHandle() {
1637         for (size_t i(GetHooks().size()); i != 0; --i) {
1638             CYHook *hook(GetHooks()[i-1]);
1639             if (hook->ExecuteEnd != NULL)
1640                 (*hook->ExecuteEnd)(context_, handles_[i-1]);
1641         }
1642     }
1643 };
1644
1645 static volatile bool cancel_;
1646
1647 static bool CYShouldTerminate(JSContextRef context, void *arg) {
1648     return cancel_;
1649 }
1650
1651 _visible const char *CYExecute(JSContextRef context, CYPool &pool, CYUTF8String code) {
1652     ExecutionHandle handle(context);
1653
1654     cancel_ = false;
1655     if (&JSContextGroupSetExecutionTimeLimit != NULL)
1656         JSContextGroupSetExecutionTimeLimit(JSContextGetGroup(context), 0.5, &CYShouldTerminate, NULL);
1657
1658     try {
1659         JSValueRef result(_jsccall(JSEvaluateScript, context, CYJSString(code), NULL, NULL, 0));
1660         if (JSValueIsUndefined(context, result))
1661             return NULL;
1662
1663         std::set<void *> objects;
1664         const char *json(_jsccall(CYPoolCCYON, pool, context, result, objects));
1665         CYSetProperty(context, CYGetGlobalObject(context), Result_, result);
1666
1667         return json;
1668     } catch (const CYException &error) {
1669         return pool.strcat("throw ", error.PoolCString(pool), NULL);
1670     }
1671 }
1672
1673 _visible void CYCancel() {
1674     cancel_ = true;
1675 }
1676
1677 static bool initialized_ = false;
1678
1679 void CYInitializeDynamic() {
1680     if (!initialized_)
1681         initialized_ = true;
1682     else return;
1683
1684     JSObjectMakeArray$ = reinterpret_cast<JSObjectRef (*)(JSContextRef, size_t, const JSValueRef[], JSValueRef *)>(dlsym(RTLD_DEFAULT, "JSObjectMakeArray"));
1685     JSSynchronousGarbageCollectForDebugging$ = reinterpret_cast<void (*)(JSContextRef)>(dlsym(RTLD_DEFAULT, "JSSynchronousGarbageCollectForDebugging"));
1686
1687     JSClassDefinition definition;
1688
1689     definition = kJSClassDefinitionEmpty;
1690     definition.className = "All";
1691     definition.hasProperty = &All_hasProperty;
1692     definition.getProperty = &All_getProperty;
1693     definition.getPropertyNames = &All_getPropertyNames;
1694     All_ = JSClassCreate(&definition);
1695
1696     definition = kJSClassDefinitionEmpty;
1697     definition.className = "Context";
1698     definition.finalize = &CYFinalize;
1699     Context_ = JSClassCreate(&definition);
1700
1701     definition = kJSClassDefinitionEmpty;
1702     definition.className = "Functor";
1703     definition.staticFunctions = cy::Functor::StaticFunctions;
1704     definition.staticValues = Functor_staticValues;
1705     definition.callAsFunction = &Functor_callAsFunction;
1706     definition.finalize = &CYFinalize;
1707     Functor_ = JSClassCreate(&definition);
1708
1709     definition = kJSClassDefinitionEmpty;
1710     definition.className = "Pointer";
1711     definition.staticFunctions = Pointer_staticFunctions;
1712     definition.staticValues = Pointer_staticValues;
1713     definition.getProperty = &Pointer_getProperty;
1714     definition.setProperty = &Pointer_setProperty;
1715     definition.finalize = &CYFinalize;
1716     Pointer_ = JSClassCreate(&definition);
1717
1718     definition = kJSClassDefinitionEmpty;
1719     definition.className = "Struct";
1720     definition.staticFunctions = Struct_staticFunctions;
1721     definition.getProperty = &Struct_getProperty;
1722     definition.setProperty = &Struct_setProperty;
1723     definition.getPropertyNames = &Struct_getPropertyNames;
1724     definition.finalize = &CYFinalize;
1725     Struct_ = JSClassCreate(&definition);
1726
1727     definition = kJSClassDefinitionEmpty;
1728     definition.className = "Type";
1729     definition.staticValues = Type_staticValues;
1730     definition.staticFunctions = Type_staticFunctions;
1731     definition.callAsFunction = &Type_callAsFunction;
1732     definition.callAsConstructor = &Type_callAsConstructor;
1733     definition.finalize = &CYFinalize;
1734     Type_privateData::Class_ = JSClassCreate(&definition);
1735
1736     definition = kJSClassDefinitionEmpty;
1737     definition.className = "Global";
1738     //definition.getProperty = &Global_getProperty;
1739     Global_ = JSClassCreate(&definition);
1740
1741     Array_s = JSStringCreateWithUTF8CString("Array");
1742     cy_s = JSStringCreateWithUTF8CString("$cy");
1743     cyi_s = JSStringCreateWithUTF8CString("$cyi");
1744     length_s = JSStringCreateWithUTF8CString("length");
1745     message_s = JSStringCreateWithUTF8CString("message");
1746     name_s = JSStringCreateWithUTF8CString("name");
1747     pop_s = JSStringCreateWithUTF8CString("pop");
1748     prototype_s = JSStringCreateWithUTF8CString("prototype");
1749     push_s = JSStringCreateWithUTF8CString("push");
1750     splice_s = JSStringCreateWithUTF8CString("splice");
1751     toCYON_s = JSStringCreateWithUTF8CString("toCYON");
1752     toJSON_s = JSStringCreateWithUTF8CString("toJSON");
1753     toPointer_s = JSStringCreateWithUTF8CString("toPointer");
1754     toString_s = JSStringCreateWithUTF8CString("toString");
1755     weak_s = JSStringCreateWithUTF8CString("weak");
1756
1757     Result_ = JSStringCreateWithUTF8CString("_");
1758
1759     for (CYHook *hook : GetHooks())
1760         if (hook->Initialize != NULL)
1761             (*hook->Initialize)();
1762 }
1763
1764 void CYThrow(JSContextRef context, JSValueRef value) {
1765     if (value != NULL)
1766         throw CYJSError(context, value);
1767 }
1768
1769 const char *CYJSError::PoolCString(CYPool &pool) const {
1770     std::set<void *> objects;
1771     // XXX: this used to be CYPoolCString
1772     return CYPoolCCYON(pool, context_, value_, objects);
1773 }
1774
1775 JSValueRef CYJSError::CastJSValue(JSContextRef context, const char *name) const {
1776     // XXX: what if the context is different? or the name? I dunno. ("epic" :/)
1777     return value_;
1778 }
1779
1780 JSValueRef CYCastJSError(JSContextRef context, const char *name, const char *message) {
1781     JSObjectRef Error(CYGetCachedObject(context, CYJSString(name)));
1782     JSValueRef arguments[1] = {CYCastJSValue(context, message)};
1783     return _jsccall(JSObjectCallAsConstructor, context, Error, 1, arguments);
1784 }
1785
1786 JSValueRef CYPoolError::CastJSValue(JSContextRef context, const char *name) const {
1787     return CYCastJSError(context, name, message_);
1788 }
1789
1790 CYJSError::CYJSError(JSContextRef context, const char *format, ...) {
1791     _assert(context != NULL);
1792
1793     CYPool pool;
1794
1795     va_list args;
1796     va_start(args, format);
1797     // XXX: there might be a beter way to think about this
1798     const char *message(pool.vsprintf(64, format, args));
1799     va_end(args);
1800
1801     value_ = CYCastJSError(context, "Error", message);
1802 }
1803
1804 JSGlobalContextRef CYGetJSContext(JSContextRef context) {
1805     return reinterpret_cast<Context *>(JSObjectGetPrivate(CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s))))->context_;
1806 }
1807
1808 void *CYMapFile(const char *path, size_t *psize) {
1809     int fd(_syscall_(open(path, O_RDONLY), 1, ENOENT));
1810     if (fd == -1)
1811         return NULL;
1812
1813     struct stat stat;
1814     _syscall(fstat(fd, &stat));
1815     size_t size(stat.st_size);
1816
1817     *psize = size;
1818
1819     void *base;
1820     _syscall(base = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0));
1821
1822     _syscall(close(fd));
1823     return base;
1824 }
1825
1826 static JSValueRef require(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1827     _assert(count == 1);
1828     CYPool pool;
1829
1830     Dl_info addr;
1831     _assert(dladdr(reinterpret_cast<void *>(&require), &addr) != 0);
1832     char *lib(pool.strdup(addr.dli_fname));
1833
1834     char *slash(strrchr(lib, '/'));
1835     _assert(slash != NULL);
1836     *slash = '\0';
1837
1838     CYJSString property("exports");
1839     JSObjectRef module;
1840
1841     const char *name(CYPoolCString(pool, context, arguments[0]));
1842     const char *path(pool.strcat(lib, "/cycript0.9/", name, ".cy", NULL));
1843
1844     CYJSString key(path);
1845     JSObjectRef modules(CYGetCachedObject(context, CYJSString("modules")));
1846     JSValueRef cache(CYGetProperty(context, modules, key));
1847
1848     if (!JSValueIsUndefined(context, cache))
1849         module = CYCastJSObject(context, cache);
1850     else {
1851         CYUTF8String code;
1852         code.data = reinterpret_cast<char *>(CYMapFile(path, &code.size));
1853
1854         if (code.data == NULL) {
1855             if (strchr(name, '/') == NULL && (
1856 #ifdef __APPLE__
1857                 dlopen(pool.strcat("/System/Library/Frameworks/", name, ".framework/", name, NULL), RTLD_LAZY | RTLD_GLOBAL) != NULL ||
1858                 dlopen(pool.strcat("/System/Library/PrivateFrameworks/", name, ".framework/", name, NULL), RTLD_LAZY | RTLD_GLOBAL) != NULL ||
1859 #endif
1860             false))
1861                 return CYJSUndefined(NULL);
1862
1863             CYThrow("Can't find module: %s", name);
1864         }
1865
1866         module = JSObjectMake(context, NULL, NULL);
1867         CYSetProperty(context, modules, key, module);
1868
1869         JSObjectRef exports(JSObjectMake(context, NULL, NULL));
1870         CYSetProperty(context, module, property, exports);
1871
1872         std::stringstream wrap;
1873         wrap << "(function (exports, require, module) { " << code << "\n});";
1874         code = CYPoolCode(pool, wrap);
1875
1876         JSValueRef value(_jsccall(JSEvaluateScript, context, CYJSString(code), NULL, NULL, 0));
1877         JSObjectRef function(CYCastJSObject(context, value));
1878
1879         JSValueRef arguments[3] = { exports, JSObjectMakeFunctionWithCallback(context, CYJSString("require"), &require), module };
1880         CYCallAsFunction(context, function, NULL, 3, arguments);
1881     }
1882
1883     return CYGetProperty(context, module, property);
1884 } CYCatch(NULL) }
1885
1886 extern "C" void CYDestroyWeak(JSWeakObjectMapRef weak, void *data) {
1887 }
1888
1889 extern "C" void CYSetupContext(JSGlobalContextRef context) {
1890     CYInitializeDynamic();
1891
1892     JSObjectRef global(CYGetGlobalObject(context));
1893
1894     JSObjectRef cy(JSObjectMake(context, Context_, new Context(context)));
1895     CYSetProperty(context, global, cy_s, cy, kJSPropertyAttributeDontEnum);
1896
1897 /* Cache Globals {{{ */
1898     JSObjectRef Array(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Array"))));
1899     CYSetProperty(context, cy, CYJSString("Array"), Array);
1900
1901     JSObjectRef Array_prototype(CYCastJSObject(context, CYGetProperty(context, Array, prototype_s)));
1902     CYSetProperty(context, cy, CYJSString("Array_prototype"), Array_prototype);
1903
1904     JSObjectRef Boolean(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Boolean"))));
1905     CYSetProperty(context, cy, CYJSString("Boolean"), Boolean);
1906
1907     JSObjectRef Boolean_prototype(CYCastJSObject(context, CYGetProperty(context, Boolean, prototype_s)));
1908     CYSetProperty(context, cy, CYJSString("Boolean_prototype"), Boolean_prototype);
1909
1910     JSObjectRef Error(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Error"))));
1911     CYSetProperty(context, cy, CYJSString("Error"), Error);
1912
1913     JSObjectRef Error_prototype(CYCastJSObject(context, CYGetProperty(context, Error, prototype_s)));
1914     CYSetProperty(context, cy, CYJSString("Error_prototype"), Error_prototype);
1915
1916     JSObjectRef Function(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Function"))));
1917     CYSetProperty(context, cy, CYJSString("Function"), Function);
1918
1919     JSObjectRef Function_prototype(CYCastJSObject(context, CYGetProperty(context, Function, prototype_s)));
1920     CYSetProperty(context, cy, CYJSString("Function_prototype"), Function_prototype);
1921
1922     JSObjectRef Number(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Number"))));
1923     CYSetProperty(context, cy, CYJSString("Number"), Number);
1924
1925     JSObjectRef Number_prototype(CYCastJSObject(context, CYGetProperty(context, Number, prototype_s)));
1926     CYSetProperty(context, cy, CYJSString("Number_prototype"), Number_prototype);
1927
1928     JSObjectRef Object(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Object"))));
1929     CYSetProperty(context, cy, CYJSString("Object"), Object);
1930
1931     JSObjectRef Object_prototype(CYCastJSObject(context, CYGetProperty(context, Object, prototype_s)));
1932     CYSetProperty(context, cy, CYJSString("Object_prototype"), Object_prototype);
1933
1934     JSObjectRef String(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("String"))));
1935     CYSetProperty(context, cy, CYJSString("String"), String);
1936
1937     JSObjectRef String_prototype(CYCastJSObject(context, CYGetProperty(context, String, prototype_s)));
1938     CYSetProperty(context, cy, CYJSString("String_prototype"), String_prototype);
1939
1940     JSObjectRef SyntaxError(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("SyntaxError"))));
1941     CYSetProperty(context, cy, CYJSString("SyntaxError"), SyntaxError);
1942 /* }}} */
1943
1944     CYSetProperty(context, Array_prototype, toCYON_s, &Array_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1945     CYSetProperty(context, Error_prototype, toCYON_s, &Error_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1946     CYSetProperty(context, String_prototype, toCYON_s, &String_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1947
1948     JSObjectRef cycript(JSObjectMake(context, NULL, NULL));
1949     CYSetProperty(context, global, CYJSString("Cycript"), cycript);
1950     CYSetProperty(context, cycript, CYJSString("compile"), &Cycript_compile_callAsFunction);
1951     CYSetProperty(context, cycript, CYJSString("gc"), &Cycript_gc_callAsFunction);
1952
1953     JSObjectRef Functor(JSObjectMakeConstructor(context, Functor_, &Functor_new));
1954     CYSetPrototype(context, CYCastJSObject(context, CYGetProperty(context, Functor, prototype_s)), Function_prototype);
1955     CYSetProperty(context, cycript, CYJSString("Functor"), Functor);
1956
1957     CYSetProperty(context, cycript, CYJSString("Pointer"), JSObjectMakeConstructor(context, Pointer_, &Pointer_new));
1958     CYSetProperty(context, cycript, CYJSString("Type"), JSObjectMakeConstructor(context, Type_privateData::Class_, &Type_new));
1959
1960     JSObjectRef modules(JSObjectMake(context, NULL, NULL));
1961     CYSetProperty(context, cy, CYJSString("modules"), modules);
1962
1963     JSObjectRef all(JSObjectMake(context, All_, NULL));
1964     CYSetProperty(context, cycript, CYJSString("all"), all);
1965
1966     JSObjectRef alls(_jsccall(JSObjectCallAsConstructor, context, Array, 0, NULL));
1967     CYSetProperty(context, cycript, CYJSString("alls"), alls);
1968
1969     if (true) {
1970         JSObjectRef last(NULL), curr(global);
1971
1972         goto next; for (JSValueRef next;;) {
1973             if (JSValueIsNull(context, next))
1974                 break;
1975             last = curr;
1976             curr = CYCastJSObject(context, next);
1977           next:
1978             next = JSObjectGetPrototype(context, curr);
1979         }
1980
1981         CYSetPrototype(context, last, all);
1982     }
1983
1984     JSObjectRef System(JSObjectMake(context, NULL, NULL));
1985     CYSetProperty(context, cy, CYJSString("System"), System);
1986
1987     CYSetProperty(context, all, CYJSString("require"), &require, kJSPropertyAttributeDontEnum);
1988
1989     CYSetProperty(context, global, CYJSString("system"), System);
1990     CYSetProperty(context, System, CYJSString("args"), CYJSNull(context));
1991     //CYSetProperty(context, System, CYJSString("global"), global);
1992     CYSetProperty(context, System, CYJSString("print"), &System_print);
1993
1994 #ifdef __APPLE__
1995     if (&JSWeakObjectMapCreate != NULL) {
1996         JSWeakObjectMapRef weak(JSWeakObjectMapCreate(context, NULL, &CYDestroyWeak));
1997         CYSetProperty(context, cy, weak_s, CYCastJSValue(context, reinterpret_cast<uintptr_t>(weak)));
1998     }
1999 #endif
2000
2001     if (CYBridgeEntry *entry = CYBridgeHash("1dlerror", 8))
2002         entry->cache_ = new cy::Functor(entry->value_, reinterpret_cast<void (*)()>(&dlerror));
2003
2004     for (CYHook *hook : GetHooks())
2005         if (hook->SetupContext != NULL)
2006             (*hook->SetupContext)(context);
2007
2008     CYArrayPush(context, alls, cycript);
2009 }
2010
2011 static JSGlobalContextRef context_;
2012
2013 _visible JSGlobalContextRef CYGetJSContext() {
2014     CYInitializeDynamic();
2015
2016     if (context_ == NULL) {
2017         context_ = JSGlobalContextCreate(Global_);
2018         CYSetupContext(context_);
2019     }
2020
2021     return context_;
2022 }
2023
2024 _visible void CYDestroyContext() {
2025     if (context_ == NULL)
2026         return;
2027     JSGlobalContextRelease(context_);
2028     context_ = NULL;
2029 }