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