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 "Internal.hpp"
  23
  24 #include <dlfcn.h>
  25 #include <dirent.h>
  26 #include <fcntl.h>
  27 #include <unistd.h>
  28
  29 #include "cycript.hpp"
  30
  31 #include "sig/parse.hpp"
  32 #include "sig/ffi_type.hpp"
  33
  34 #include "Pooling.hpp"
  35 #include "Execute.hpp"
  36
  37 #include <sys/mman.h>
  38 #include <sys/stat.h>
  39
  40 #include <iostream>
  41 #include <set>
  42 #include <map>
  43 #include <iomanip>
  44 #include <sstream>
  45 #include <cmath>
  46
  47 #include "Code.hpp"
  48 #include "Decode.hpp"
  49 #include "Error.hpp"
  50 #include "JavaScript.hpp"
  51 #include "String.hpp"
  52
  53 static std::vector<CYHook *> &GetHooks() {
  54     static std::vector<CYHook *> hooks;
  55     return hooks;
  56 }
  57
  58 CYRegisterHook::CYRegisterHook(CYHook *hook) {
  59     GetHooks().push_back(hook);
  60 }
  61
  62 /* JavaScript Properties {{{ */
  63 bool CYHasProperty(JSContextRef context, JSObjectRef object, JSStringRef name) {
  64     return JSObjectHasProperty(context, object, name);
  65 }
  66
  67 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, size_t index) {
  68     return _jsccall(JSObjectGetPropertyAtIndex, context, object, index);
  69 }
  70
  71 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, JSStringRef name) {
  72     return _jsccall(JSObjectGetProperty, context, object, name);
  73 }
  74
  75 void CYSetProperty(JSContextRef context, JSObjectRef object, size_t index, JSValueRef value) {
  76     _jsccall(JSObjectSetPropertyAtIndex, context, object, index, value);
  77 }
  78
  79 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef value, JSPropertyAttributes attributes) {
  80     _jsccall(JSObjectSetProperty, context, object, name, value, attributes);
  81 }
  82
  83 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef (*callback)(JSContextRef, JSObjectRef, JSObjectRef, size_t, const JSValueRef[], JSValueRef *), JSPropertyAttributes attributes) {
  84     CYSetProperty(context, object, name, JSObjectMakeFunctionWithCallback(context, name, callback), attributes);
  85 }
  86
  87 void CYSetPrototype(JSContextRef context, JSObjectRef object, JSValueRef value) {
  88     JSObjectSetPrototype(context, object, value);
  89     _assert(CYIsStrictEqual(context, JSObjectGetPrototype(context, object), value));
  90 }
  91 /* }}} */
  92 /* JavaScript Strings {{{ */
  93 JSStringRef CYCopyJSString(const char *value) {
  94     return value == NULL ? NULL : JSStringCreateWithUTF8CString(value);
  95 }
  96
  97 JSStringRef CYCopyJSString(JSStringRef value) {
  98     return value == NULL ? NULL : JSStringRetain(value);
  99 }
 100
 101 JSStringRef CYCopyJSString(CYUTF8String value) {
 102     // XXX: this is very wrong; it needs to convert to UTF16 and then create from there
 103     return CYCopyJSString(value.data);
 104 }
 105
 106 JSStringRef CYCopyJSString(JSContextRef context, JSValueRef value) {
 107     if (JSValueIsNull(context, value))
 108         return NULL;
 109     return _jsccall(JSValueToStringCopy, context, value);
 110 }
 111
 112 static CYUTF16String CYCastUTF16String(JSStringRef value) {
 113     return CYUTF16String(JSStringGetCharactersPtr(value), JSStringGetLength(value));
 114 }
 115
 116 CYUTF8String CYPoolUTF8String(CYPool &pool, JSContextRef context, JSStringRef value) {
 117     return CYPoolUTF8String(pool, CYCastUTF16String(value));
 118 }
 119
 120 const char *CYPoolCString(CYPool &pool, JSContextRef context, JSStringRef value) {
 121     CYUTF8String utf8(CYPoolUTF8String(pool, context, value));
 122     _assert(memchr(utf8.data, '\0', utf8.size) == NULL);
 123     return utf8.data;
 124 }
 125
 126 const char *CYPoolCString(CYPool &pool, JSContextRef context, JSValueRef value) {
 127     return JSValueIsNull(context, value) ? NULL : CYPoolCString(pool, context, CYJSString(context, value));
 128 }
 129 /* }}} */
 130 /* Index Offsets {{{ */
 131 size_t CYGetIndex(CYPool &pool, JSContextRef context, JSStringRef value) {
 132     return CYGetIndex(CYPoolUTF8String(pool, context, value));
 133 }
 134 /* }}} */
 135
 136 static JSClassRef All_;
 137 static JSClassRef Context_;
 138 JSClassRef Functor_;
 139 static JSClassRef Global_;
 140 static JSClassRef Pointer_;
 141 static JSClassRef Struct_;
 142
 143 JSStringRef Array_s;
 144 JSStringRef cy_s;
 145 JSStringRef cyi_s;
 146 JSStringRef length_s;
 147 JSStringRef message_s;
 148 JSStringRef name_s;
 149 JSStringRef pop_s;
 150 JSStringRef prototype_s;
 151 JSStringRef push_s;
 152 JSStringRef splice_s;
 153 JSStringRef toCYON_s;
 154 JSStringRef toJSON_s;
 155 JSStringRef toPointer_s;
 156 JSStringRef toString_s;
 157 JSStringRef weak_s;
 158
 159 static JSStringRef Result_;
 160
 161 void CYFinalize(JSObjectRef object) {
 162     CYData *internal(reinterpret_cast<CYData *>(JSObjectGetPrivate(object)));
 163     _assert(internal->count_ != _not(unsigned));
 164     if (--internal->count_ == 0)
 165         delete internal;
 166 }
 167
 168 void Structor_(CYPool &pool, sig::Type *&type) {
 169     if (
 170         type->primitive == sig::pointer_P &&
 171         type->data.data.type->primitive == sig::struct_P &&
 172         type->data.data.type->name != NULL &&
 173         strcmp(type->data.data.type->name, "_objc_class") == 0
 174     ) {
 175         type->primitive = sig::typename_P;
 176         type->data.data.type = NULL;
 177         return;
 178     }
 179
 180     if (type->primitive != sig::struct_P || type->name == NULL)
 181         return;
 182
 183     size_t length(strlen(type->name));
 184     char keyed[length + 2];
 185     memcpy(keyed + 1, type->name, length + 1);
 186
 187     static const char *modes = "34";
 188     for (size_t i(0); i != 2; ++i) {
 189         char mode(modes[i]);
 190         keyed[0] = mode;
 191
 192         if (CYBridgeEntry *entry = CYBridgeHash(keyed, length + 1))
 193             switch (mode) {
 194                 case '3':
 195                     sig::Parse(pool, &type->data.signature, entry->value_, &Structor_);
 196                 break;
 197
 198                 case '4': {
 199                     sig::Signature signature;
 200                     sig::Parse(pool, &signature, entry->value_, &Structor_);
 201                     type = signature.elements[0].type;
 202                 } break;
 203             }
 204     }
 205 }
 206
 207 JSClassRef Type_privateData::Class_;
 208
 209 struct Context :
 210     CYData
 211 {
 212     JSGlobalContextRef context_;
 213
 214     Context(JSGlobalContextRef context) :
 215         context_(context)
 216     {
 217     }
 218 };
 219
 220 struct Pointer :
 221     CYOwned
 222 {
 223     Type_privateData *type_;
 224     size_t length_;
 225
 226     Pointer(void *value, JSContextRef context, JSObjectRef owner, size_t length, sig::Type *type) :
 227         CYOwned(value, context, owner),
 228         type_(new(*pool_) Type_privateData(type)),
 229         length_(length)
 230     {
 231     }
 232 };
 233
 234 struct Struct_privateData :
 235     CYOwned
 236 {
 237     Type_privateData *type_;
 238
 239     Struct_privateData(JSContextRef context, JSObjectRef owner) :
 240         CYOwned(NULL, context, owner)
 241     {
 242     }
 243 };
 244
 245 JSObjectRef CYMakeStruct(JSContextRef context, void *data, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 246     Struct_privateData *internal(new Struct_privateData(context, owner));
 247     CYPool &pool(*internal->pool_);
 248     Type_privateData *typical(new(pool) Type_privateData(type, ffi));
 249     internal->type_ = typical;
 250
 251     if (owner != NULL)
 252         internal->value_ = data;
 253     else {
 254         size_t size(typical->GetFFI()->size);
 255         void *copy(internal->pool_->malloc<void>(size));
 256         memcpy(copy, data, size);
 257         internal->value_ = copy;
 258     }
 259
 260     return JSObjectMake(context, Struct_, internal);
 261 }
 262
 263 static void *CYCastSymbol(const char *name) {
 264     for (CYHook *hook : GetHooks())
 265         if (hook->CastSymbol != NULL)
 266             if (void *value = (*hook->CastSymbol)(name))
 267                 return value;
 268     return dlsym(RTLD_DEFAULT, name);
 269 }
 270
 271 JSValueRef CYCastJSValue(JSContextRef context, bool value) {
 272     return JSValueMakeBoolean(context, value);
 273 }
 274
 275 JSValueRef CYCastJSValue(JSContextRef context, double value) {
 276     return JSValueMakeNumber(context, value);
 277 }
 278
 279 #define CYCastJSValue_(Type_) \
 280     JSValueRef CYCastJSValue(JSContextRef context, Type_ value) { \
 281         return JSValueMakeNumber(context, static_cast<double>(value)); \
 282     }
 283
 284 CYCastJSValue_(int)
 285 CYCastJSValue_(unsigned int)
 286 CYCastJSValue_(long int)
 287 CYCastJSValue_(long unsigned int)
 288 CYCastJSValue_(long long int)
 289 CYCastJSValue_(long long unsigned int)
 290
 291 JSValueRef CYJSUndefined(JSContextRef context) {
 292     return JSValueMakeUndefined(context);
 293 }
 294
 295 double CYCastDouble(JSContextRef context, JSValueRef value) {
 296     return _jsccall(JSValueToNumber, context, value);
 297 }
 298
 299 bool CYCastBool(JSContextRef context, JSValueRef value) {
 300     return JSValueToBoolean(context, value);
 301 }
 302
 303 JSValueRef CYJSNull(JSContextRef context) {
 304     return JSValueMakeNull(context);
 305 }
 306
 307 JSValueRef CYCastJSValue(JSContextRef context, JSStringRef value) {
 308     return value == NULL ? CYJSNull(context) : JSValueMakeString(context, value);
 309 }
 310
 311 JSValueRef CYCastJSValue(JSContextRef context, const char *value) {
 312     return CYCastJSValue(context, CYJSString(value));
 313 }
 314
 315 JSObjectRef CYCastJSObject(JSContextRef context, JSValueRef value) {
 316     return _jsccall(JSValueToObject, context, value);
 317 }
 318
 319 JSValueRef CYCallAsFunction(JSContextRef context, JSObjectRef function, JSObjectRef _this, size_t count, const JSValueRef arguments[]) {
 320     return _jsccall(JSObjectCallAsFunction, context, function, _this, count, arguments);
 321 }
 322
 323 bool CYIsCallable(JSContextRef context, JSValueRef value) {
 324     return value != NULL && JSValueIsObject(context, value) && JSObjectIsFunction(context, (JSObjectRef) value);
 325 }
 326
 327 bool CYIsEqual(JSContextRef context, JSValueRef lhs, JSValueRef rhs) {
 328     return _jsccall(JSValueIsEqual, context, lhs, rhs);
 329 }
 330
 331 bool CYIsStrictEqual(JSContextRef context, JSValueRef lhs, JSValueRef rhs) {
 332     return JSValueIsStrictEqual(context, lhs, rhs);
 333 }
 334
 335 size_t CYArrayLength(JSContextRef context, JSObjectRef array) {
 336     return CYCastDouble(context, CYGetProperty(context, array, length_s));
 337 }
 338
 339 JSValueRef CYArrayGet(JSContextRef context, JSObjectRef array, size_t index) {
 340     return _jsccall(JSObjectGetPropertyAtIndex, context, array, index);
 341 }
 342
 343 void CYArrayPush(JSContextRef context, JSObjectRef array, JSValueRef value) {
 344     JSValueRef arguments[1];
 345     arguments[0] = value;
 346     JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array_prototype")));
 347     _jsccall(JSObjectCallAsFunction, context, CYCastJSObject(context, CYGetProperty(context, Array, push_s)), array, 1, arguments);
 348 }
 349
 350 static JSValueRef System_print(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 351     if (count == 0)
 352         printf("\n");
 353     else {
 354         CYPool pool;
 355         printf("%s\n", CYPoolCString(pool, context, arguments[0]));
 356     }
 357
 358     return CYJSUndefined(context);
 359 } CYCatch(NULL) }
 360
 361 static size_t Nonce_(0);
 362
 363 static JSValueRef $cyq(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 364     CYPool pool;
 365     const char *name(pool.strcat(CYPoolCString(pool, context, arguments[0]), pool.itoa(Nonce_++), NULL));
 366     return CYCastJSValue(context, name);
 367 } CYCatch(NULL) }
 368
 369 static void (*JSSynchronousGarbageCollectForDebugging$)(JSContextRef);
 370
 371 void CYGarbageCollect(JSContextRef context) {
 372     (JSSynchronousGarbageCollectForDebugging$ ?: &JSGarbageCollect)(context);
 373 }
 374
 375 static JSValueRef Cycript_gc_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 376     CYGarbageCollect(context);
 377     return CYJSUndefined(context);
 378 } CYCatch(NULL) }
 379
 380 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSValueRef value, std::set<void *> &objects, JSValueRef *exception) { CYTry {
 381     switch (JSType type = JSValueGetType(context, value)) {
 382         case kJSTypeUndefined:
 383             return "undefined";
 384         case kJSTypeNull:
 385             return "null";
 386         case kJSTypeBoolean:
 387             return CYCastBool(context, value) ? "true" : "false";
 388
 389         case kJSTypeNumber: {
 390             std::ostringstream str;
 391             CYNumerify(str, CYCastDouble(context, value));
 392             std::string value(str.str());
 393             return pool.strmemdup(value.c_str(), value.size());
 394         } break;
 395
 396         case kJSTypeString: {
 397             std::ostringstream str;
 398             CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, value)));
 399             CYStringify(str, string.data, string.size);
 400             std::string value(str.str());
 401             return pool.strmemdup(value.c_str(), value.size());
 402         } break;
 403
 404         case kJSTypeObject:
 405             return CYPoolCCYON(pool, context, (JSObjectRef) value, objects);
 406         default:
 407             throw CYJSError(context, "JSValueGetType() == 0x%x", type);
 408     }
 409 } CYCatch(NULL) }
 410
 411 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSValueRef value, std::set<void *> &objects) {
 412     return _jsccall(CYPoolCCYON, pool, context, value, objects);
 413 }
 414
 415 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSValueRef value, std::set<void *> *objects) {
 416     if (objects != NULL)
 417         return CYPoolCCYON(pool, context, value, *objects);
 418     else {
 419         std::set<void *> objects;
 420         return CYPoolCCYON(pool, context, value, objects);
 421     }
 422 }
 423
 424 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSObjectRef object, std::set<void *> &objects) {
 425     JSValueRef toCYON(CYGetProperty(context, object, toCYON_s));
 426     if (CYIsCallable(context, toCYON)) {
 427         // XXX: this needs to be abstracted behind some kind of function
 428         JSValueRef arguments[1] = {CYCastJSValue(context, reinterpret_cast<uintptr_t>(&objects))};
 429         JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toCYON, object, 1, arguments));
 430         _assert(value != NULL);
 431         return CYPoolCString(pool, context, value);
 432     }
 433
 434     JSValueRef toJSON(CYGetProperty(context, object, toJSON_s));
 435     if (CYIsCallable(context, toJSON)) {
 436         JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 437         return _jsccall(CYPoolCCYON, pool, context, CYCallAsFunction(context, (JSObjectRef) toJSON, object, 1, arguments), objects);
 438     }
 439
 440     if (JSObjectIsFunction(context, object)) {
 441         JSValueRef toString(CYGetProperty(context, object, toString_s));
 442         if (CYIsCallable(context, toString)) {
 443             JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 444             JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toString, object, 1, arguments));
 445             _assert(value != NULL);
 446             return CYPoolCString(pool, context, value);
 447         }
 448     }
 449
 450     _assert(objects.insert(object).second);
 451
 452     std::ostringstream str;
 453
 454     str << '{';
 455
 456     // XXX: this is, sadly, going to leak
 457     JSPropertyNameArrayRef names(JSObjectCopyPropertyNames(context, object));
 458
 459     bool comma(false);
 460
 461     for (size_t index(0), count(JSPropertyNameArrayGetCount(names)); index != count; ++index) {
 462         if (comma)
 463             str << ',';
 464         else
 465             comma = true;
 466
 467         JSStringRef name(JSPropertyNameArrayGetNameAtIndex(names, index));
 468         CYUTF8String string(CYPoolUTF8String(pool, context, name));
 469
 470         if (CYIsKey(string))
 471             str << string.data;
 472         else
 473             CYStringify(str, string.data, string.size);
 474
 475         str << ':';
 476
 477         try {
 478             JSValueRef value(CYGetProperty(context, object, name));
 479             str << CYPoolCCYON(pool, context, value, objects);
 480         } catch (const CYException &error) {
 481             str << "@error";
 482         }
 483     }
 484
 485     JSPropertyNameArrayRelease(names);
 486
 487     str << '}';
 488
 489     std::string string(str.str());
 490     return pool.strmemdup(string.c_str(), string.size());
 491 }
 492
 493 std::set<void *> *CYCastObjects(JSContextRef context, JSObjectRef _this, size_t count, const JSValueRef arguments[]) {
 494     if (count == 0)
 495         return NULL;
 496     return CYCastPointer<std::set<void *> *>(context, arguments[0]);
 497 }
 498
 499 static JSValueRef Array_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 500     std::set<void *> *objects(CYCastObjects(context, _this, count, arguments));
 501     // XXX: this is horribly inefficient
 502     std::set<void *> backup;
 503     if (objects == NULL)
 504         objects = &backup;
 505
 506     CYPool pool;
 507     std::ostringstream str;
 508
 509     str << '[';
 510
 511     JSValueRef length(CYGetProperty(context, _this, length_s));
 512     bool comma(false);
 513
 514     for (size_t index(0), count(CYCastDouble(context, length)); index != count; ++index) {
 515         if (comma)
 516             str << ',';
 517         else
 518             comma = true;
 519
 520         try {
 521             JSValueRef value(CYGetProperty(context, _this, index));
 522             if (!JSValueIsUndefined(context, value))
 523                 str << CYPoolCCYON(pool, context, value, *objects);
 524             else {
 525                 str << ',';
 526                 comma = false;
 527             }
 528         } catch (const CYException &error) {
 529             str << "@error";
 530         }
 531     }
 532
 533     str << ']';
 534
 535     std::string value(str.str());
 536     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 537 } CYCatch(NULL) }
 538
 539 static JSValueRef String_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 540     CYPool pool;
 541     std::ostringstream str;
 542
 543     CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, _this)));
 544     CYStringify(str, string.data, string.size);
 545
 546     std::string value(str.str());
 547     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 548 } CYCatch(NULL) }
 549
 550 JSObjectRef CYMakePointer(JSContextRef context, void *pointer, size_t length, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 551     Pointer *internal(new Pointer(pointer, context, owner, length, type));
 552     return JSObjectMake(context, Pointer_, internal);
 553 }
 554
 555 static JSObjectRef CYMakeFunctor(JSContextRef context, void (*function)(), const sig::Signature &signature) {
 556     return JSObjectMake(context, Functor_, new cy::Functor(signature, function));
 557 }
 558
 559 static JSObjectRef CYMakeFunctor(JSContextRef context, const char *symbol, const char *encoding, void **cache) {
 560     cy::Functor *internal;
 561     if (*cache != NULL)
 562         internal = reinterpret_cast<cy::Functor *>(*cache);
 563     else {
 564         void (*function)()(reinterpret_cast<void (*)()>(CYCastSymbol(symbol)));
 565         if (function == NULL)
 566             return NULL;
 567
 568         internal = new cy::Functor(encoding, function);
 569         *cache = internal;
 570     }
 571
 572     ++internal->count_;
 573     return JSObjectMake(context, Functor_, internal);
 574 }
 575
 576 static bool CYGetOffset(CYPool &pool, JSContextRef context, JSStringRef value, ssize_t &index) {
 577     return CYGetOffset(CYPoolCString(pool, context, value), index);
 578 }
 579
 580 void *CYCastPointer_(JSContextRef context, JSValueRef value) {
 581     if (value == NULL)
 582         return NULL;
 583     else switch (JSValueGetType(context, value)) {
 584         case kJSTypeNull:
 585             return NULL;
 586         case kJSTypeObject: {
 587             JSObjectRef object((JSObjectRef) value);
 588             if (JSValueIsObjectOfClass(context, value, Pointer_)) {
 589                 Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 590                 return internal->value_;
 591             }
 592             JSValueRef toPointer(CYGetProperty(context, object, toPointer_s));
 593             if (CYIsCallable(context, toPointer)) {
 594                 JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toPointer, object, 0, NULL));
 595                 _assert(value != NULL);
 596                 return CYCastPointer_(context, value);
 597             }
 598         } default:
 599             double number(CYCastDouble(context, value));
 600             if (std::isnan(number))
 601                 throw CYJSError(context, "cannot convert value to pointer");
 602             return reinterpret_cast<void *>(static_cast<uintptr_t>(static_cast<long long>(number)));
 603     }
 604 }
 605
 606 void CYPoolFFI(CYPool *pool, JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, JSValueRef value) {
 607     switch (type->primitive) {
 608         case sig::boolean_P:
 609             *reinterpret_cast<bool *>(data) = JSValueToBoolean(context, value);
 610         break;
 611
 612 #define CYPoolFFI_(primitive, native) \
 613         case sig::primitive ## _P: \
 614             *reinterpret_cast<native *>(data) = CYCastDouble(context, value); \
 615         break;
 616
 617         CYPoolFFI_(uchar, unsigned char)
 618         CYPoolFFI_(char, char)
 619         CYPoolFFI_(ushort, unsigned short)
 620         CYPoolFFI_(short, short)
 621         CYPoolFFI_(ulong, unsigned long)
 622         CYPoolFFI_(long, long)
 623         CYPoolFFI_(uint, unsigned int)
 624         CYPoolFFI_(int, int)
 625         CYPoolFFI_(ulonglong, unsigned long long)
 626         CYPoolFFI_(longlong, long long)
 627         CYPoolFFI_(float, float)
 628         CYPoolFFI_(double, double)
 629
 630         case sig::array_P: {
 631             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 632             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 633             for (size_t index(0); index != type->data.data.size; ++index) {
 634                 ffi_type *field(ffi->elements[index]);
 635
 636                 JSValueRef rhs;
 637                 if (aggregate == NULL)
 638                     rhs = value;
 639                 else {
 640                     rhs = CYGetProperty(context, aggregate, index);
 641                     if (JSValueIsUndefined(context, rhs))
 642                         throw CYJSError(context, "unable to extract array value");
 643                 }
 644
 645                 CYPoolFFI(pool, context, type->data.data.type, field, base, rhs);
 646                 // XXX: alignment?
 647                 base += field->size;
 648             }
 649         } break;
 650
 651         case sig::pointer_P:
 652             *reinterpret_cast<void **>(data) = CYCastPointer<void *>(context, value);
 653         break;
 654
 655         case sig::string_P:
 656             _assert(pool != NULL);
 657             *reinterpret_cast<const char **>(data) = CYPoolCString(*pool, context, value);
 658         break;
 659
 660         case sig::struct_P: {
 661             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 662             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 663             for (size_t index(0); index != type->data.signature.count; ++index) {
 664                 sig::Element *element(&type->data.signature.elements[index]);
 665                 ffi_type *field(ffi->elements[index]);
 666
 667                 JSValueRef rhs;
 668                 if (aggregate == NULL)
 669                     rhs = value;
 670                 else {
 671                     rhs = CYGetProperty(context, aggregate, index);
 672                     if (JSValueIsUndefined(context, rhs)) {
 673                         if (element->name != NULL)
 674                             rhs = CYGetProperty(context, aggregate, CYJSString(element->name));
 675                         else
 676                             goto undefined;
 677                         if (JSValueIsUndefined(context, rhs)) undefined:
 678                             throw CYJSError(context, "unable to extract structure value");
 679                     }
 680                 }
 681
 682                 CYPoolFFI(pool, context, element->type, field, base, rhs);
 683                 // XXX: alignment?
 684                 base += field->size;
 685             }
 686         } break;
 687
 688         case sig::void_P:
 689         break;
 690
 691         default:
 692             for (CYHook *hook : GetHooks())
 693                 if (hook->PoolFFI != NULL)
 694                     if ((*hook->PoolFFI)(pool, context, type, ffi, data, value))
 695                         return;
 696
 697             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 698     }
 699 }
 700
 701 JSValueRef CYFromFFI(JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, bool initialize, JSObjectRef owner) {
 702     switch (type->primitive) {
 703         case sig::boolean_P:
 704             return CYCastJSValue(context, *reinterpret_cast<bool *>(data));
 705
 706 #define CYFromFFI_(primitive, native) \
 707         case sig::primitive ## _P: \
 708             return CYCastJSValue(context, *reinterpret_cast<native *>(data)); \
 709
 710         CYFromFFI_(uchar, unsigned char)
 711         CYFromFFI_(char, char)
 712         CYFromFFI_(ushort, unsigned short)
 713         CYFromFFI_(short, short)
 714         CYFromFFI_(ulong, unsigned long)
 715         CYFromFFI_(long, long)
 716         CYFromFFI_(uint, unsigned int)
 717         CYFromFFI_(int, int)
 718         CYFromFFI_(ulonglong, unsigned long long)
 719         CYFromFFI_(longlong, long long)
 720         CYFromFFI_(float, float)
 721         CYFromFFI_(double, double)
 722
 723         case sig::array_P:
 724             if (void *pointer = data)
 725                 return CYMakePointer(context, pointer, type->data.data.size, type->data.data.type, NULL, owner);
 726             else goto null;
 727
 728         case sig::pointer_P:
 729             if (void *pointer = *reinterpret_cast<void **>(data))
 730                 return CYMakePointer(context, pointer, _not(size_t), type->data.data.type, NULL, owner);
 731             else goto null;
 732
 733         case sig::string_P:
 734             if (char *utf8 = *reinterpret_cast<char **>(data))
 735                 return CYCastJSValue(context, utf8);
 736             else goto null;
 737
 738         case sig::struct_P:
 739             return CYMakeStruct(context, data, type, ffi, owner);
 740         case sig::void_P:
 741             return CYJSUndefined(context);
 742
 743         null:
 744             return CYJSNull(context);
 745         default:
 746             for (CYHook *hook : GetHooks())
 747                 if (hook->FromFFI != NULL)
 748                     if (JSValueRef value = (*hook->FromFFI)(context, type, ffi, data, initialize, owner))
 749                         return value;
 750
 751             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 752     }
 753 }
 754
 755 void CYExecuteClosure(ffi_cif *cif, void *result, void **arguments, void *arg) {
 756     Closure_privateData *internal(reinterpret_cast<Closure_privateData *>(arg));
 757
 758     JSContextRef context(internal->context_);
 759
 760     size_t count(internal->cif_.nargs);
 761     JSValueRef values[count];
 762
 763     for (size_t index(0); index != count; ++index)
 764         values[index] = CYFromFFI(context, internal->signature_.elements[1 + index].type, internal->cif_.arg_types[index], arguments[index]);
 765
 766     JSValueRef value(internal->adapter_(context, count, values, internal->function_));
 767     CYPoolFFI(NULL, context, internal->signature_.elements[0].type, internal->cif_.rtype, result, value);
 768 }
 769
 770 static JSValueRef FunctionAdapter_(JSContextRef context, size_t count, JSValueRef values[], JSObjectRef function) {
 771     return CYCallAsFunction(context, function, NULL, count, values);
 772 }
 773
 774 Closure_privateData *CYMakeFunctor_(JSContextRef context, JSObjectRef function, const sig::Signature &signature, JSValueRef (*adapter)(JSContextRef, size_t, JSValueRef[], JSObjectRef)) {
 775     // XXX: in case of exceptions this will leak
 776     // XXX: in point of fact, this may /need/ to leak :(
 777     Closure_privateData *internal(new Closure_privateData(context, function, adapter, signature));
 778
 779 #if defined(__APPLE__) && (defined(__arm__) || defined(__arm64__))
 780     void *executable;
 781     ffi_closure *writable(reinterpret_cast<ffi_closure *>(ffi_closure_alloc(sizeof(ffi_closure), &executable)));
 782
 783     ffi_status status(ffi_prep_closure_loc(writable, &internal->cif_, &CYExecuteClosure, internal, executable));
 784     _assert(status == FFI_OK);
 785
 786     internal->value_ = executable;
 787 #else
 788     ffi_closure *closure((ffi_closure *) _syscall(mmap(
 789         NULL, sizeof(ffi_closure),
 790         PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE,
 791         -1, 0
 792     )));
 793
 794     ffi_status status(ffi_prep_closure(closure, &internal->cif_, &CYExecuteClosure, internal));
 795     _assert(status == FFI_OK);
 796
 797     _syscall(mprotect(closure, sizeof(*closure), PROT_READ | PROT_EXEC));
 798
 799     internal->value_ = closure;
 800 #endif
 801
 802     return internal;
 803 }
 804
 805 static JSObjectRef CYMakeFunctor(JSContextRef context, JSObjectRef function, const sig::Signature &signature) {
 806     Closure_privateData *internal(CYMakeFunctor_(context, function, signature, &FunctionAdapter_));
 807     JSObjectRef object(JSObjectMake(context, Functor_, internal));
 808     // XXX: see above notes about needing to leak
 809     JSValueProtect(CYGetJSContext(context), object);
 810     return object;
 811 }
 812
 813 JSValueRef CYGetCachedValue(JSContextRef context, JSStringRef name) {
 814     return CYGetProperty(context, CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s)), name);
 815 }
 816
 817 JSObjectRef CYGetCachedObject(JSContextRef context, JSStringRef name) {
 818     return CYCastJSObject(context, CYGetCachedValue(context, name));
 819 }
 820
 821 static JSObjectRef CYMakeFunctor(JSContextRef context, JSValueRef value, const sig::Signature &signature) {
 822     JSObjectRef Function(CYGetCachedObject(context, CYJSString("Function")));
 823
 824     bool function(_jsccall(JSValueIsInstanceOfConstructor, context, value, Function));
 825     if (function) {
 826         JSObjectRef function(CYCastJSObject(context, value));
 827         return CYMakeFunctor(context, function, signature);
 828     } else {
 829         void (*function)()(CYCastPointer<void (*)()>(context, value));
 830         return CYMakeFunctor(context, function, signature);
 831     }
 832 }
 833
 834 static bool Index_(CYPool &pool, JSContextRef context, Struct_privateData *internal, JSStringRef property, ssize_t &index, uint8_t *&base) {
 835     Type_privateData *typical(internal->type_);
 836     sig::Type *type(typical->type_);
 837     if (type == NULL)
 838         return false;
 839
 840     const char *name(CYPoolCString(pool, context, property));
 841     size_t length(strlen(name));
 842     double number(CYCastDouble(name, length));
 843
 844     size_t count(type->data.signature.count);
 845
 846     if (std::isnan(number)) {
 847         if (property == NULL)
 848             return false;
 849
 850         sig::Element *elements(type->data.signature.elements);
 851
 852         for (size_t local(0); local != count; ++local) {
 853             sig::Element *element(&elements[local]);
 854             if (element->name != NULL && strcmp(name, element->name) == 0) {
 855                 index = local;
 856                 goto base;
 857             }
 858         }
 859
 860         return false;
 861     } else {
 862         index = static_cast<ssize_t>(number);
 863         if (index != number || index < 0 || static_cast<size_t>(index) >= count)
 864             return false;
 865     }
 866
 867   base:
 868     ffi_type **elements(typical->GetFFI()->elements);
 869
 870     base = reinterpret_cast<uint8_t *>(internal->value_);
 871     for (ssize_t local(0); local != index; ++local)
 872         base += elements[local]->size;
 873
 874     return true;
 875 }
 876
 877 static JSValueRef Pointer_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 878     CYPool pool;
 879     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 880
 881     if (JSStringIsEqual(property, length_s))
 882         return internal->length_ == _not(size_t) ? CYJSUndefined(context) : CYCastJSValue(context, internal->length_);
 883
 884     Type_privateData *typical(internal->type_);
 885     if (typical->type_ == NULL)
 886         return NULL;
 887     sig::Type &type(*typical->type_);
 888
 889     ssize_t offset;
 890     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 891         offset = 0;
 892     else if (!CYGetOffset(pool, context, property, offset))
 893         return NULL;
 894
 895     if (type.primitive == sig::function_P)
 896         return CYMakeFunctor(context, reinterpret_cast<void (*)()>(internal->value_), type.data.signature);
 897
 898     ffi_type *ffi(typical->GetFFI());
 899
 900     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 901     base += ffi->size * offset;
 902
 903     JSObjectRef owner(internal->GetOwner() ?: object);
 904     return CYFromFFI(context, &type, ffi, base, false, owner);
 905 } CYCatch(NULL) }
 906
 907 static bool Pointer_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 908     CYPool pool;
 909     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 910     Type_privateData *typical(internal->type_);
 911
 912     if (typical->type_ == NULL)
 913         return false;
 914
 915     ssize_t offset;
 916     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 917         offset = 0;
 918     else if (!CYGetOffset(pool, context, property, offset))
 919         return false;
 920
 921     ffi_type *ffi(typical->GetFFI());
 922
 923     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 924     base += ffi->size * offset;
 925
 926     CYPoolFFI(NULL, context, typical->type_, ffi, base, value);
 927     return true;
 928 } CYCatch(false) }
 929
 930 static JSValueRef Struct_callAsFunction_$cya(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 931     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(_this)));
 932     Type_privateData *typical(internal->type_);
 933     return CYMakePointer(context, internal->value_, _not(size_t), typical->type_, typical->ffi_, _this);
 934 } CYCatch(NULL) }
 935
 936 static JSValueRef Struct_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 937     CYPool pool;
 938     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 939     Type_privateData *typical(internal->type_);
 940
 941     ssize_t index;
 942     uint8_t *base;
 943
 944     if (!Index_(pool, context, internal, property, index, base))
 945         return NULL;
 946
 947     JSObjectRef owner(internal->GetOwner() ?: object);
 948
 949     return CYFromFFI(context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, false, owner);
 950 } CYCatch(NULL) }
 951
 952 static bool Struct_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 953     CYPool pool;
 954     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 955     Type_privateData *typical(internal->type_);
 956
 957     ssize_t index;
 958     uint8_t *base;
 959
 960     if (!Index_(pool, context, internal, property, index, base))
 961         return false;
 962
 963     CYPoolFFI(NULL, context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, value);
 964     return true;
 965 } CYCatch(false) }
 966
 967 static void Struct_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
 968     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 969     Type_privateData *typical(internal->type_);
 970     sig::Type *type(typical->type_);
 971
 972     if (type == NULL)
 973         return;
 974
 975     size_t count(type->data.signature.count);
 976     sig::Element *elements(type->data.signature.elements);
 977
 978     char number[32];
 979
 980     for (size_t index(0); index != count; ++index) {
 981         const char *name;
 982         name = elements[index].name;
 983
 984         if (name == NULL) {
 985             sprintf(number, "%zu", index);
 986             name = number;
 987         }
 988
 989         JSPropertyNameAccumulatorAddName(names, CYJSString(name));
 990     }
 991 }
 992
 993 void CYCallFunction(CYPool &pool, JSContextRef context, ffi_cif *cif, void (*function)(), void *value, void **values) {
 994     ffi_call(cif, function, value, values);
 995 }
 996
 997 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)()) {
 998     if (setups + count != signature->count - 1)
 999         throw CYJSError(context, "incorrect number of arguments to ffi function");
1000
1001     size_t size(setups + count);
1002     void *values[size];
1003     memcpy(values, setup, sizeof(void *) * setups);
1004
1005     for (size_t index(setups); index != size; ++index) {
1006         sig::Element *element(&signature->elements[index + 1]);
1007         ffi_type *ffi(cif->arg_types[index]);
1008         // XXX: alignment?
1009         values[index] = new(pool) uint8_t[ffi->size];
1010         CYPoolFFI(&pool, context, element->type, ffi, values[index], arguments[index - setups]);
1011     }
1012
1013     uint8_t value[cif->rtype->size];
1014
1015     void (*call)(CYPool &, JSContextRef, ffi_cif *, void (*)(), void *, void **) = &CYCallFunction;
1016     // XXX: this only supports one hook, but it is a bad idea anyway
1017     for (CYHook *hook : GetHooks())
1018         if (hook->CallFunction != NULL)
1019             call = hook->CallFunction;
1020
1021     call(pool, context, cif, function, value, values);
1022     return CYFromFFI(context, signature->elements[0].type, cif->rtype, value, initialize);
1023 }
1024
1025 static JSValueRef Functor_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1026     CYPool pool;
1027     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
1028     return CYCallFunction(pool, context, 0, NULL, count, arguments, false, &internal->signature_, &internal->cif_, internal->GetValue());
1029 } CYCatch(NULL) }
1030
1031 JSObjectRef CYMakeType(JSContextRef context, const char *encoding) {
1032     Type_privateData *internal(new Type_privateData(encoding));
1033     return JSObjectMake(context, Type_privateData::Class_, internal);
1034 }
1035
1036 JSObjectRef CYMakeType(JSContextRef context, sig::Type *type) {
1037     Type_privateData *internal(new Type_privateData(type));
1038     return JSObjectMake(context, Type_privateData::Class_, internal);
1039 }
1040
1041 JSObjectRef CYMakeType(JSContextRef context, sig::Signature *signature) {
1042     CYPool pool;
1043
1044     sig::Type type;
1045     type.name = NULL;
1046     type.flags = 0;
1047
1048     type.primitive = sig::function_P;
1049     sig::Copy(pool, type.data.signature, *signature);
1050
1051     return CYMakeType(context, &type);
1052 }
1053
1054 static bool All_hasProperty(JSContextRef context, JSObjectRef object, JSStringRef property) {
1055     JSObjectRef global(CYGetGlobalObject(context));
1056     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
1057     JSObjectRef alls(CYCastJSObject(context, CYGetProperty(context, cycript, CYJSString("alls"))));
1058
1059     for (size_t i(0), count(CYArrayLength(context, alls)); i != count; ++i)
1060         if (JSObjectRef space = CYCastJSObject(context, CYArrayGet(context, alls, count - i - 1)))
1061             if (CYHasProperty(context, space, property))
1062                 return true;
1063
1064     CYPool pool;
1065     CYUTF8String name(CYPoolUTF8String(pool, context, property));
1066
1067     size_t length(name.size);
1068     char keyed[length + 2];
1069     memcpy(keyed + 1, name.data, length + 1);
1070
1071     static const char *modes = "0124";
1072     for (size_t i(0); i != 4; ++i) {
1073         keyed[0] = modes[i];
1074         if (CYBridgeHash(keyed, length + 1) != NULL)
1075             return true;
1076     }
1077
1078     return false;
1079 }
1080
1081 static JSValueRef All_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1082     JSObjectRef global(CYGetGlobalObject(context));
1083     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
1084     JSObjectRef alls(CYCastJSObject(context, CYGetProperty(context, cycript, CYJSString("alls"))));
1085
1086     for (size_t i(0), count(CYArrayLength(context, alls)); i != count; ++i)
1087         if (JSObjectRef space = CYCastJSObject(context, CYArrayGet(context, alls, count - i - 1)))
1088             if (JSValueRef value = CYGetProperty(context, space, property))
1089                 if (!JSValueIsUndefined(context, value))
1090                     return value;
1091
1092     CYPool pool;
1093     CYUTF8String name(CYPoolUTF8String(pool, context, property));
1094
1095     size_t length(name.size);
1096     char keyed[length + 2];
1097     memcpy(keyed + 1, name.data, length + 1);
1098
1099     static const char *modes = "0124";
1100     for (size_t i(0); i != 4; ++i) {
1101         char mode(modes[i]);
1102         keyed[0] = mode;
1103
1104         if (CYBridgeEntry *entry = CYBridgeHash(keyed, length + 1))
1105             switch (mode) {
1106                 case '0':
1107                     return JSEvaluateScript(CYGetJSContext(context), CYJSString(entry->value_), NULL, NULL, 0, NULL);
1108
1109                 case '1':
1110                     return CYMakeFunctor(context, name.data, entry->value_, &entry->cache_);
1111
1112                 case '2':
1113                     if (void *symbol = CYCastSymbol(name.data)) {
1114                         // XXX: this is horrendously inefficient
1115                         sig::Signature signature;
1116                         sig::Parse(pool, &signature, entry->value_, &Structor_);
1117                         ffi_cif cif;
1118                         sig::sig_ffi_cif(pool, &sig::ObjectiveC, &signature, &cif);
1119                         return CYFromFFI(context, signature.elements[0].type, cif.rtype, symbol);
1120                     } else return NULL;
1121
1122                 // XXX: implement case 3
1123                 case '4':
1124                     return CYMakeType(context, entry->value_);
1125             }
1126     }
1127
1128     return NULL;
1129 } CYCatch(NULL) }
1130
1131 static void All_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
1132     JSObjectRef global(CYGetGlobalObject(context));
1133     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
1134     JSObjectRef alls(CYCastJSObject(context, CYGetProperty(context, cycript, CYJSString("alls"))));
1135
1136     for (size_t i(0), count(CYArrayLength(context, alls)); i != count; ++i)
1137         if (JSObjectRef space = CYCastJSObject(context, CYArrayGet(context, alls, count - i - 1))) {
1138             JSPropertyNameArrayRef subset(JSObjectCopyPropertyNames(context, space));
1139             for (size_t index(0), count(JSPropertyNameArrayGetCount(subset)); index != count; ++index)
1140                 JSPropertyNameAccumulatorAddName(names, JSPropertyNameArrayGetNameAtIndex(subset, index));
1141             JSPropertyNameArrayRelease(subset);
1142         }
1143 }
1144
1145 static JSObjectRef Pointer_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1146     if (count != 2)
1147         throw CYJSError(context, "incorrect number of arguments to Pointer constructor");
1148
1149     CYPool pool;
1150
1151     void *value(CYCastPointer<void *>(context, arguments[0]));
1152     const char *type(CYPoolCString(pool, context, arguments[1]));
1153
1154     sig::Signature signature;
1155     sig::Parse(pool, &signature, type, &Structor_);
1156
1157     return CYMakePointer(context, value, _not(size_t), signature.elements[0].type, NULL, NULL);
1158 } CYCatch(NULL) }
1159
1160 static JSObjectRef Type_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1161     if (count != 1)
1162         throw CYJSError(context, "incorrect number of arguments to Type constructor");
1163     CYPool pool;
1164     const char *type(CYPoolCString(pool, context, arguments[0]));
1165     return CYMakeType(context, type);
1166 } CYCatch(NULL) }
1167
1168 static JSValueRef Type_callAsFunction_$With(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], sig::Primitive primitive, JSValueRef *exception) { CYTry {
1169     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1170
1171     CYPool pool;
1172
1173     sig::Type type;
1174     type.name = NULL;
1175     type.flags = 0;
1176
1177     type.primitive = primitive;
1178     type.data.signature.elements = new(pool) sig::Element[1 + count];
1179     type.data.signature.count = 1 + count;
1180
1181     type.data.signature.elements[0].name = NULL;
1182     type.data.signature.elements[0].type = internal->type_;
1183     type.data.signature.elements[0].offset = _not(size_t);
1184
1185     for (size_t i(0); i != count; ++i) {
1186         sig::Element &element(type.data.signature.elements[i + 1]);
1187         element.name = NULL;
1188         element.offset = _not(size_t);
1189
1190         JSObjectRef object(CYCastJSObject(context, arguments[i]));
1191         _assert(JSValueIsObjectOfClass(context, object, Type_privateData::Class_));
1192         Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1193
1194         element.type = internal->type_;
1195     }
1196
1197     return CYMakeType(context, &type);
1198 } CYCatch(NULL) }
1199
1200 static JSValueRef Type_callAsFunction_arrayOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1201     if (count != 1)
1202         throw CYJSError(context, "incorrect number of arguments to Type.arrayOf");
1203     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1204
1205     CYPool pool;
1206     size_t index(CYGetIndex(pool, context, CYJSString(context, arguments[0])));
1207     if (index == _not(size_t))
1208         throw CYJSError(context, "invalid array size used with Type.arrayOf");
1209
1210     sig::Type type;
1211     type.name = NULL;
1212     type.flags = 0;
1213
1214     type.primitive = sig::array_P;
1215     type.data.data.type = internal->type_;
1216     type.data.data.size = index;
1217
1218     return CYMakeType(context, &type);
1219 } CYCatch(NULL) }
1220
1221 static JSValueRef Type_callAsFunction_blockWith(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1222     return Type_callAsFunction_$With(context, object, _this, count, arguments, sig::block_P, exception);
1223 }
1224
1225 static JSValueRef Type_callAsFunction_constant(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1226     if (count != 0)
1227         throw CYJSError(context, "incorrect number of arguments to Type.constant");
1228     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1229
1230     sig::Type type(*internal->type_);
1231     type.flags |= JOC_TYPE_CONST;
1232     return CYMakeType(context, &type);
1233 } CYCatch(NULL) }
1234
1235 static JSValueRef Type_callAsFunction_long(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1236     if (count != 0)
1237         throw CYJSError(context, "incorrect number of arguments to Type.long");
1238     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1239
1240     sig::Type type(*internal->type_);
1241
1242     switch (type.primitive) {
1243         case sig::short_P: type.primitive = sig::int_P; break;
1244         case sig::int_P: type.primitive = sig::long_P; break;
1245         case sig::long_P: type.primitive = sig::longlong_P; break;
1246         default: throw CYJSError(context, "invalid type argument to Type.long");
1247     }
1248
1249     return CYMakeType(context, &type);
1250 } CYCatch(NULL) }
1251
1252 static JSValueRef Type_callAsFunction_short(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1253     if (count != 0)
1254         throw CYJSError(context, "incorrect number of arguments to Type.short");
1255     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1256
1257     sig::Type type(*internal->type_);
1258
1259     switch (type.primitive) {
1260         case sig::int_P: type.primitive = sig::short_P; break;
1261         case sig::long_P: type.primitive = sig::int_P; break;
1262         case sig::longlong_P: type.primitive = sig::long_P; break;
1263         default: throw CYJSError(context, "invalid type argument to Type.short");
1264     }
1265
1266     return CYMakeType(context, &type);
1267 } CYCatch(NULL) }
1268
1269 static JSValueRef Type_callAsFunction_signed(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1270     if (count != 0)
1271         throw CYJSError(context, "incorrect number of arguments to Type.signed");
1272     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1273
1274     sig::Type type(*internal->type_);
1275
1276     switch (type.primitive) {
1277         case sig::char_P: case sig::uchar_P: type.primitive = sig::char_P; break;
1278         case sig::short_P: case sig::ushort_P: type.primitive = sig::short_P; break;
1279         case sig::int_P: case sig::uint_P: type.primitive = sig::int_P; break;
1280         case sig::long_P: case sig::ulong_P: type.primitive = sig::long_P; break;
1281         case sig::longlong_P: case sig::ulonglong_P: type.primitive = sig::longlong_P; break;
1282         default: throw CYJSError(context, "invalid type argument to Type.signed");
1283     }
1284
1285     return CYMakeType(context, &type);
1286 } CYCatch(NULL) }
1287
1288 static JSValueRef Type_callAsFunction_unsigned(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1289     if (count != 0)
1290         throw CYJSError(context, "incorrect number of arguments to Type.unsigned");
1291     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1292
1293     sig::Type type(*internal->type_);
1294
1295     switch (type.primitive) {
1296         case sig::char_P: case sig::uchar_P: type.primitive = sig::uchar_P; break;
1297         case sig::short_P: case sig::ushort_P: type.primitive = sig::ushort_P; break;
1298         case sig::int_P: case sig::uint_P: type.primitive = sig::uint_P; break;
1299         case sig::long_P: case sig::ulong_P: type.primitive = sig::ulong_P; break;
1300         case sig::longlong_P: case sig::ulonglong_P: type.primitive = sig::ulonglong_P; break;
1301         default: throw CYJSError(context, "invalid type argument to Type.unsigned");
1302     }
1303
1304     return CYMakeType(context, &type);
1305 } CYCatch(NULL) }
1306
1307 static JSValueRef Type_callAsFunction_functionWith(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1308     return Type_callAsFunction_$With(context, object, _this, count, arguments, sig::function_P, exception);
1309 }
1310
1311 static JSValueRef Type_callAsFunction_pointerTo(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1312     if (count != 0)
1313         throw CYJSError(context, "incorrect number of arguments to Type.pointerTo");
1314     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1315
1316     sig::Type type;
1317     type.name = NULL;
1318
1319     if (internal->type_->primitive == sig::char_P) {
1320         type.flags = internal->type_->flags;
1321         type.primitive = sig::string_P;
1322         type.data.data.type = NULL;
1323         type.data.data.size = 0;
1324     } else {
1325         type.flags = 0;
1326         type.primitive = sig::pointer_P;
1327         type.data.data.type = internal->type_;
1328         type.data.data.size = 0;
1329     }
1330
1331     return CYMakeType(context, &type);
1332 } CYCatch(NULL) }
1333
1334 static JSValueRef Type_callAsFunction_withName(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1335     if (count != 1)
1336         throw CYJSError(context, "incorrect number of arguments to Type.withName");
1337     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1338
1339     CYPool pool;
1340     const char *name(CYPoolCString(pool, context, arguments[0]));
1341
1342     sig::Type type(*internal->type_);
1343     type.name = name;
1344     return CYMakeType(context, &type);
1345 } CYCatch(NULL) }
1346
1347 static JSValueRef Type_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1348     if (count != 1)
1349         throw CYJSError(context, "incorrect number of arguments to type cast function");
1350     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1351
1352     if (internal->type_->primitive == sig::function_P)
1353         return CYMakeFunctor(context, arguments[0], internal->type_->data.signature);
1354
1355     sig::Type *type(internal->type_);
1356     ffi_type *ffi(internal->GetFFI());
1357     // XXX: alignment?
1358     uint8_t value[ffi->size];
1359     CYPool pool;
1360     CYPoolFFI(&pool, context, type, ffi, value, arguments[0]);
1361     return CYFromFFI(context, type, ffi, value);
1362 } CYCatch(NULL) }
1363
1364 static JSObjectRef Type_callAsConstructor(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1365     if (count != 0)
1366         throw CYJSError(context, "incorrect number of arguments to Type allocator");
1367     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1368
1369     sig::Type *type(internal->type_);
1370     size_t length;
1371
1372     if (type->primitive != sig::array_P)
1373         length = _not(size_t);
1374     else {
1375         length = type->data.data.size;
1376         type = type->data.data.type;
1377     }
1378
1379     void *value(calloc(1, internal->GetFFI()->size));
1380     return CYMakePointer(context, value, length, type, NULL, NULL);
1381 } CYCatch(NULL) }
1382
1383 static JSObjectRef Functor_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1384     if (count != 2)
1385         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1386     CYPool pool;
1387     const char *encoding(CYPoolCString(pool, context, arguments[1]));
1388     sig::Signature signature;
1389     sig::Parse(pool, &signature, encoding, &Structor_);
1390     return CYMakeFunctor(context, arguments[0], signature);
1391 } CYCatch(NULL) }
1392
1393 static JSValueRef CYValue_callAsFunction_valueOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1394     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1395     return CYCastJSValue(context, reinterpret_cast<uintptr_t>(internal->value_));
1396 } CYCatch(NULL) }
1397
1398 static JSValueRef CYValue_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1399     return CYValue_callAsFunction_valueOf(context, object, _this, count, arguments, exception);
1400 }
1401
1402 static JSValueRef CYValue_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1403     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1404     char string[32];
1405     sprintf(string, "%p", internal->value_);
1406     return CYCastJSValue(context, string);
1407 } CYCatch(NULL) }
1408
1409 static JSValueRef Pointer_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1410     std::set<void *> *objects(CYCastObjects(context, _this, count, arguments));
1411
1412     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(_this)));
1413     if (internal->length_ != _not(size_t)) {
1414         JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array_prototype")));
1415         JSObjectRef toCYON(CYCastJSObject(context, CYGetProperty(context, Array, toCYON_s)));
1416         return CYCallAsFunction(context, toCYON, _this, count, arguments);
1417     } else if (internal->type_->type_ == NULL) pointer: {
1418         char string[32];
1419         sprintf(string, "%p", internal->value_);
1420         return CYCastJSValue(context, string);
1421     } try {
1422         JSValueRef value(CYGetProperty(context, _this, cyi_s));
1423         if (JSValueIsUndefined(context, value))
1424             goto pointer;
1425         CYPool pool;
1426         return CYCastJSValue(context, pool.strcat("&", CYPoolCCYON(pool, context, value, objects), NULL));
1427     } catch (const CYException &e) {
1428         goto pointer;
1429     }
1430 } CYCatch(NULL) }
1431
1432 static JSValueRef Pointer_getProperty_type(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1433     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
1434     return CYMakeType(context, internal->type_->type_);
1435 } CYCatch(NULL) }
1436
1437 static JSValueRef Functor_getProperty_type(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1438     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
1439     return CYMakeType(context, &internal->signature_);
1440 } CYCatch(NULL) }
1441
1442 static JSValueRef Type_getProperty_alignment(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1443     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1444     return CYCastJSValue(context, internal->GetFFI()->alignment);
1445 } CYCatch(NULL) }
1446
1447 static JSValueRef Type_getProperty_name(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1448     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1449     return CYCastJSValue(context, internal->type_->name);
1450 } CYCatch(NULL) }
1451
1452 static JSValueRef Type_getProperty_size(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1453     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1454     return CYCastJSValue(context, internal->GetFFI()->size);
1455 } CYCatch(NULL) }
1456
1457 static JSValueRef Type_callAsFunction_toString(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1458     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1459     CYPool pool;
1460     const char *type(sig::Unparse(pool, internal->type_));
1461     return CYCastJSValue(context, CYJSString(type));
1462 } CYCatch(NULL) }
1463
1464 static JSValueRef Type_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1465     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1466     CYLocalPool pool;
1467     std::ostringstream out;
1468     CYOptions options;
1469     CYOutput output(out, options);
1470     (new(pool) CYEncodedType(Decode(pool, internal->type_)))->Output(output, CYNoFlags);
1471     return CYCastJSValue(context, CYJSString(out.str().c_str()));
1472 } CYCatch(NULL) }
1473
1474 static JSValueRef Type_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1475     return Type_callAsFunction_toString(context, object, _this, count, arguments, exception);
1476 }
1477
1478 static JSStaticFunction Pointer_staticFunctions[4] = {
1479     {"toCYON", &Pointer_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1480     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1481     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1482     {NULL, NULL, 0}
1483 };
1484
1485 static JSStaticValue Pointer_staticValues[2] = {
1486     {"type", &Pointer_getProperty_type, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1487     {NULL, NULL, NULL, 0}
1488 };
1489
1490 static JSStaticFunction Struct_staticFunctions[2] = {
1491     {"$cya", &Struct_callAsFunction_$cya, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1492     {NULL, NULL, 0}
1493 };
1494
1495 static JSStaticFunction Functor_staticFunctions[4] = {
1496     {"toCYON", &CYValue_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1497     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1498     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1499     {NULL, NULL, 0}
1500 };
1501
1502 namespace cy {
1503     JSStaticFunction const * const Functor::StaticFunctions = Functor_staticFunctions;
1504 }
1505
1506 static JSStaticValue Functor_staticValues[2] = {
1507     {"type", &Functor_getProperty_type, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1508     {NULL, NULL, NULL, 0}
1509 };
1510
1511 namespace cy {
1512     JSStaticValue const * const Functor::StaticValues = Functor_staticValues;
1513 }
1514
1515 static JSStaticValue Type_staticValues[4] = {
1516     {"alignment", &Type_getProperty_alignment, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1517     {"name", &Type_getProperty_name, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1518     {"size", &Type_getProperty_size, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1519     {NULL, NULL, NULL, 0}
1520 };
1521
1522 static JSStaticFunction Type_staticFunctions[14] = {
1523     {"arrayOf", &Type_callAsFunction_arrayOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1524     {"blockWith", &Type_callAsFunction_blockWith, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1525     {"constant", &Type_callAsFunction_constant, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1526     {"functionWith", &Type_callAsFunction_functionWith, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1527     {"long", &Type_callAsFunction_long, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1528     {"pointerTo", &Type_callAsFunction_pointerTo, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1529     {"short", &Type_callAsFunction_short, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1530     {"signed", &Type_callAsFunction_signed, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1531     {"withName", &Type_callAsFunction_withName, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1532     {"toCYON", &Type_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1533     {"toJSON", &Type_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1534     {"toString", &Type_callAsFunction_toString, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1535     {"unsigned", &Type_callAsFunction_unsigned, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1536     {NULL, NULL, 0}
1537 };
1538
1539 static JSObjectRef (*JSObjectMakeArray$)(JSContextRef, size_t, const JSValueRef[], JSValueRef *);
1540
1541 void CYSetArgs(int argc, const char *argv[]) {
1542     JSContextRef context(CYGetJSContext());
1543     JSValueRef args[argc];
1544     for (int i(0); i != argc; ++i)
1545         args[i] = CYCastJSValue(context, argv[i]);
1546
1547     JSObjectRef array;
1548     if (JSObjectMakeArray$ != NULL)
1549         array = _jsccall(*JSObjectMakeArray$, context, argc, args);
1550     else {
1551         JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array")));
1552         JSValueRef value(CYCallAsFunction(context, Array, NULL, argc, args));
1553         array = CYCastJSObject(context, value);
1554     }
1555
1556     JSObjectRef System(CYGetCachedObject(context, CYJSString("System")));
1557     CYSetProperty(context, System, CYJSString("args"), array);
1558 }
1559
1560 JSObjectRef CYGetGlobalObject(JSContextRef context) {
1561     return JSContextGetGlobalObject(context);
1562 }
1563
1564 // XXX: this is neither exceptin safe nor even terribly sane
1565 class ExecutionHandle {
1566   private:
1567     JSContextRef context_;
1568     std::vector<void *> handles_;
1569
1570   public:
1571     ExecutionHandle(JSContextRef context) :
1572         context_(context)
1573     {
1574         handles_.resize(GetHooks().size());
1575         for (size_t i(0); i != GetHooks().size(); ++i) {
1576             CYHook *hook(GetHooks()[i]);
1577             if (hook->ExecuteStart != NULL)
1578                 handles_[i] = (*hook->ExecuteStart)(context_);
1579             else
1580                 handles_[i] = NULL;
1581         }
1582     }
1583
1584     ~ExecutionHandle() {
1585         for (size_t i(GetHooks().size()); i != 0; --i) {
1586             CYHook *hook(GetHooks()[i-1]);
1587             if (hook->ExecuteEnd != NULL)
1588                 (*hook->ExecuteEnd)(context_, handles_[i-1]);
1589         }
1590     }
1591 };
1592
1593 static volatile bool cancel_;
1594
1595 static bool CYShouldTerminate(JSContextRef context, void *arg) {
1596     return cancel_;
1597 }
1598
1599 const char *CYExecute(JSContextRef context, CYPool &pool, CYUTF8String code) {
1600     JSValueRef exception(NULL);
1601     if (false) error:
1602         return CYPoolCString(pool, context, CYJSString(context, exception));
1603
1604     ExecutionHandle handle(context);
1605
1606     cancel_ = false;
1607     if (&JSContextGroupSetExecutionTimeLimit != NULL)
1608         JSContextGroupSetExecutionTimeLimit(JSContextGetGroup(context), 0.5, &CYShouldTerminate, NULL);
1609
1610     JSValueRef result(JSEvaluateScript(context, CYJSString(code), NULL, NULL, 0, &exception));
1611     if (exception != NULL)
1612         goto error;
1613
1614     if (JSValueIsUndefined(context, result))
1615         return NULL;
1616
1617     std::set<void *> objects;
1618     const char *json(CYPoolCCYON(pool, context, result, objects, &exception));
1619     if (exception != NULL)
1620         goto error;
1621
1622     CYSetProperty(context, CYGetGlobalObject(context), Result_, result);
1623
1624     return json;
1625 }
1626
1627 void CYCancel() {
1628     cancel_ = true;
1629 }
1630
1631 static bool initialized_ = false;
1632
1633 void CYInitializeDynamic() {
1634     if (!initialized_)
1635         initialized_ = true;
1636     else return;
1637
1638     JSObjectMakeArray$ = reinterpret_cast<JSObjectRef (*)(JSContextRef, size_t, const JSValueRef[], JSValueRef *)>(dlsym(RTLD_DEFAULT, "JSObjectMakeArray"));
1639     JSSynchronousGarbageCollectForDebugging$ = reinterpret_cast<void (*)(JSContextRef)>(dlsym(RTLD_DEFAULT, "JSSynchronousGarbageCollectForDebugging"));
1640
1641     JSClassDefinition definition;
1642
1643     definition = kJSClassDefinitionEmpty;
1644     definition.className = "All";
1645     definition.hasProperty = &All_hasProperty;
1646     definition.getProperty = &All_getProperty;
1647     definition.getPropertyNames = &All_getPropertyNames;
1648     All_ = JSClassCreate(&definition);
1649
1650     definition = kJSClassDefinitionEmpty;
1651     definition.className = "Context";
1652     definition.finalize = &CYFinalize;
1653     Context_ = JSClassCreate(&definition);
1654
1655     definition = kJSClassDefinitionEmpty;
1656     definition.className = "Functor";
1657     definition.staticFunctions = cy::Functor::StaticFunctions;
1658     definition.staticValues = Functor_staticValues;
1659     definition.callAsFunction = &Functor_callAsFunction;
1660     definition.finalize = &CYFinalize;
1661     Functor_ = JSClassCreate(&definition);
1662
1663     definition = kJSClassDefinitionEmpty;
1664     definition.className = "Pointer";
1665     definition.staticFunctions = Pointer_staticFunctions;
1666     definition.staticValues = Pointer_staticValues;
1667     definition.getProperty = &Pointer_getProperty;
1668     definition.setProperty = &Pointer_setProperty;
1669     definition.finalize = &CYFinalize;
1670     Pointer_ = JSClassCreate(&definition);
1671
1672     definition = kJSClassDefinitionEmpty;
1673     definition.className = "Struct";
1674     definition.staticFunctions = Struct_staticFunctions;
1675     definition.getProperty = &Struct_getProperty;
1676     definition.setProperty = &Struct_setProperty;
1677     definition.getPropertyNames = &Struct_getPropertyNames;
1678     definition.finalize = &CYFinalize;
1679     Struct_ = JSClassCreate(&definition);
1680
1681     definition = kJSClassDefinitionEmpty;
1682     definition.className = "Type";
1683     definition.staticValues = Type_staticValues;
1684     definition.staticFunctions = Type_staticFunctions;
1685     definition.callAsFunction = &Type_callAsFunction;
1686     definition.callAsConstructor = &Type_callAsConstructor;
1687     definition.finalize = &CYFinalize;
1688     Type_privateData::Class_ = JSClassCreate(&definition);
1689
1690     definition = kJSClassDefinitionEmpty;
1691     definition.className = "Global";
1692     //definition.getProperty = &Global_getProperty;
1693     Global_ = JSClassCreate(&definition);
1694
1695     Array_s = JSStringCreateWithUTF8CString("Array");
1696     cy_s = JSStringCreateWithUTF8CString("$cy");
1697     cyi_s = JSStringCreateWithUTF8CString("$cyi");
1698     length_s = JSStringCreateWithUTF8CString("length");
1699     message_s = JSStringCreateWithUTF8CString("message");
1700     name_s = JSStringCreateWithUTF8CString("name");
1701     pop_s = JSStringCreateWithUTF8CString("pop");
1702     prototype_s = JSStringCreateWithUTF8CString("prototype");
1703     push_s = JSStringCreateWithUTF8CString("push");
1704     splice_s = JSStringCreateWithUTF8CString("splice");
1705     toCYON_s = JSStringCreateWithUTF8CString("toCYON");
1706     toJSON_s = JSStringCreateWithUTF8CString("toJSON");
1707     toPointer_s = JSStringCreateWithUTF8CString("toPointer");
1708     toString_s = JSStringCreateWithUTF8CString("toString");
1709     weak_s = JSStringCreateWithUTF8CString("weak");
1710
1711     Result_ = JSStringCreateWithUTF8CString("_");
1712
1713     for (CYHook *hook : GetHooks())
1714         if (hook->Initialize != NULL)
1715             (*hook->Initialize)();
1716 }
1717
1718 void CYThrow(JSContextRef context, JSValueRef value) {
1719     if (value != NULL)
1720         throw CYJSError(context, value);
1721 }
1722
1723 const char *CYJSError::PoolCString(CYPool &pool) const {
1724     std::set<void *> objects;
1725     // XXX: this used to be CYPoolCString
1726     return CYPoolCCYON(pool, context_, value_, objects);
1727 }
1728
1729 JSValueRef CYJSError::CastJSValue(JSContextRef context) const {
1730     // XXX: what if the context is different?
1731     return value_;
1732 }
1733
1734 JSValueRef CYCastJSError(JSContextRef context, const char *message) {
1735     JSObjectRef Error(CYGetCachedObject(context, CYJSString("Error")));
1736     JSValueRef arguments[1] = {CYCastJSValue(context, message)};
1737     return _jsccall(JSObjectCallAsConstructor, context, Error, 1, arguments);
1738 }
1739
1740 JSValueRef CYPoolError::CastJSValue(JSContextRef context) const {
1741     return CYCastJSError(context, message_);
1742 }
1743
1744 CYJSError::CYJSError(JSContextRef context, const char *format, ...) {
1745     _assert(context != NULL);
1746
1747     CYPool pool;
1748
1749     va_list args;
1750     va_start(args, format);
1751     // XXX: there might be a beter way to think about this
1752     const char *message(pool.vsprintf(64, format, args));
1753     va_end(args);
1754
1755     value_ = CYCastJSError(context, message);
1756 }
1757
1758 JSGlobalContextRef CYGetJSContext(JSContextRef context) {
1759     return reinterpret_cast<Context *>(JSObjectGetPrivate(CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s))))->context_;
1760 }
1761
1762 extern "C" bool CydgetMemoryParse(const uint16_t **data, size_t *size);
1763
1764 void *CYMapFile(const char *path, size_t *psize) {
1765     int fd(_syscall_(open(path, O_RDONLY), 1, ENOENT));
1766     if (fd == -1)
1767         return NULL;
1768
1769     struct stat stat;
1770     _syscall(fstat(fd, &stat));
1771     size_t size(stat.st_size);
1772
1773     *psize = size;
1774
1775     void *base;
1776     _syscall(base = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0));
1777
1778     _syscall(close(fd));
1779     return base;
1780 }
1781
1782 static JSValueRef require(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1783     _assert(count == 1);
1784     CYPool pool;
1785
1786     Dl_info addr;
1787     _assert(dladdr(reinterpret_cast<void *>(&require), &addr) != 0);
1788     char *lib(pool.strdup(addr.dli_fname));
1789
1790     char *slash(strrchr(lib, '/'));
1791     _assert(slash != NULL);
1792     *slash = '\0';
1793
1794     CYJSString property("exports");
1795     JSObjectRef module;
1796
1797     const char *name(CYPoolCString(pool, context, arguments[0]));
1798     const char *path(pool.strcat(lib, "/cycript0.9/", name, ".cy", NULL));
1799
1800     CYJSString key(path);
1801     JSObjectRef modules(CYGetCachedObject(context, CYJSString("modules")));
1802     JSValueRef cache(CYGetProperty(context, modules, key));
1803
1804     if (!JSValueIsUndefined(context, cache))
1805         module = CYCastJSObject(context, cache);
1806     else {
1807         CYUTF8String code;
1808         code.data = reinterpret_cast<char *>(CYMapFile(path, &code.size));
1809
1810         if (code.data == NULL) {
1811             if (strchr(name, '/') == NULL && (
1812 #ifdef __APPLE__
1813                 dlopen(pool.strcat("/System/Library/Frameworks/", name, ".framework/", name, NULL), RTLD_LAZY | RTLD_GLOBAL) != NULL ||
1814                 dlopen(pool.strcat("/System/Library/PrivateFrameworks/", name, ".framework/", name, NULL), RTLD_LAZY | RTLD_GLOBAL) != NULL ||
1815 #endif
1816             false))
1817                 return CYJSUndefined(NULL);
1818
1819             CYThrow("Can't find module: %s", name);
1820         }
1821
1822         module = JSObjectMake(context, NULL, NULL);
1823         CYSetProperty(context, modules, key, module);
1824
1825         JSObjectRef exports(JSObjectMake(context, NULL, NULL));
1826         CYSetProperty(context, module, property, exports);
1827
1828         std::stringstream wrap;
1829         wrap << "(function (exports, require, module) { " << code << "\n});";
1830         code = CYPoolCode(pool, wrap);
1831
1832         JSValueRef value(_jsccall(JSEvaluateScript, context, CYJSString(code), NULL, NULL, 0));
1833         JSObjectRef function(CYCastJSObject(context, value));
1834
1835         JSValueRef arguments[3] = { exports, JSObjectMakeFunctionWithCallback(context, CYJSString("require"), &require), module };
1836         CYCallAsFunction(context, function, NULL, 3, arguments);
1837     }
1838
1839     return CYGetProperty(context, module, property);
1840 } CYCatch(NULL) }
1841
1842 extern "C" void CYDestroyWeak(JSWeakObjectMapRef weak, void *data) {
1843 }
1844
1845 extern "C" void CYSetupContext(JSGlobalContextRef context) {
1846     CYInitializeDynamic();
1847
1848     JSObjectRef global(CYGetGlobalObject(context));
1849
1850     JSObjectRef cy(JSObjectMake(context, Context_, new Context(context)));
1851     CYSetProperty(context, global, cy_s, cy, kJSPropertyAttributeDontEnum);
1852
1853 /* Cache Globals {{{ */
1854     JSObjectRef Array(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Array"))));
1855     CYSetProperty(context, cy, CYJSString("Array"), Array);
1856
1857     JSObjectRef Array_prototype(CYCastJSObject(context, CYGetProperty(context, Array, prototype_s)));
1858     CYSetProperty(context, cy, CYJSString("Array_prototype"), Array_prototype);
1859
1860     JSObjectRef Boolean(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Boolean"))));
1861     CYSetProperty(context, cy, CYJSString("Boolean"), Boolean);
1862
1863     JSObjectRef Boolean_prototype(CYCastJSObject(context, CYGetProperty(context, Boolean, prototype_s)));
1864     CYSetProperty(context, cy, CYJSString("Boolean_prototype"), Boolean_prototype);
1865
1866     JSObjectRef Error(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Error"))));
1867     CYSetProperty(context, cy, CYJSString("Error"), Error);
1868
1869     JSObjectRef Function(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Function"))));
1870     CYSetProperty(context, cy, CYJSString("Function"), Function);
1871
1872     JSObjectRef Function_prototype(CYCastJSObject(context, CYGetProperty(context, Function, prototype_s)));
1873     CYSetProperty(context, cy, CYJSString("Function_prototype"), Function_prototype);
1874
1875     JSObjectRef Number(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Number"))));
1876     CYSetProperty(context, cy, CYJSString("Number"), Number);
1877
1878     JSObjectRef Number_prototype(CYCastJSObject(context, CYGetProperty(context, Number, prototype_s)));
1879     CYSetProperty(context, cy, CYJSString("Number_prototype"), Number_prototype);
1880
1881     JSObjectRef Object(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Object"))));
1882     CYSetProperty(context, cy, CYJSString("Object"), Object);
1883
1884     JSObjectRef Object_prototype(CYCastJSObject(context, CYGetProperty(context, Object, prototype_s)));
1885     CYSetProperty(context, cy, CYJSString("Object_prototype"), Object_prototype);
1886
1887     JSObjectRef String(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("String"))));
1888     CYSetProperty(context, cy, CYJSString("String"), String);
1889
1890     JSObjectRef String_prototype(CYCastJSObject(context, CYGetProperty(context, String, prototype_s)));
1891     CYSetProperty(context, cy, CYJSString("String_prototype"), String_prototype);
1892 /* }}} */
1893
1894     CYSetProperty(context, Array_prototype, toCYON_s, &Array_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1895     CYSetProperty(context, String_prototype, toCYON_s, &String_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1896
1897     JSObjectRef cycript(JSObjectMake(context, NULL, NULL));
1898     CYSetProperty(context, global, CYJSString("Cycript"), cycript);
1899     CYSetProperty(context, cycript, CYJSString("gc"), &Cycript_gc_callAsFunction);
1900
1901     JSObjectRef Functor(JSObjectMakeConstructor(context, Functor_, &Functor_new));
1902     CYSetPrototype(context, CYCastJSObject(context, CYGetProperty(context, Functor, prototype_s)), Function_prototype);
1903     CYSetProperty(context, cycript, CYJSString("Functor"), Functor);
1904
1905     CYSetProperty(context, cycript, CYJSString("Pointer"), JSObjectMakeConstructor(context, Pointer_, &Pointer_new));
1906     CYSetProperty(context, cycript, CYJSString("Type"), JSObjectMakeConstructor(context, Type_privateData::Class_, &Type_new));
1907
1908     JSObjectRef modules(JSObjectMake(context, NULL, NULL));
1909     CYSetProperty(context, cy, CYJSString("modules"), modules);
1910
1911     JSObjectRef all(JSObjectMake(context, All_, NULL));
1912     CYSetProperty(context, cycript, CYJSString("all"), all);
1913
1914     JSObjectRef alls(_jsccall(JSObjectCallAsConstructor, context, Array, 0, NULL));
1915     CYSetProperty(context, cycript, CYJSString("alls"), alls);
1916
1917     if (true) {
1918         JSObjectRef last(NULL), curr(global);
1919
1920         goto next; for (JSValueRef next;;) {
1921             if (JSValueIsNull(context, next))
1922                 break;
1923             last = curr;
1924             curr = CYCastJSObject(context, next);
1925           next:
1926             next = JSObjectGetPrototype(context, curr);
1927         }
1928
1929         CYSetPrototype(context, last, all);
1930     }
1931
1932     CYSetProperty(context, global, CYJSString("$cyq"), &$cyq, kJSPropertyAttributeDontEnum);
1933
1934     JSObjectRef System(JSObjectMake(context, NULL, NULL));
1935     CYSetProperty(context, cy, CYJSString("System"), System);
1936
1937     CYSetProperty(context, all, CYJSString("require"), &require, kJSPropertyAttributeDontEnum);
1938
1939     CYSetProperty(context, global, CYJSString("system"), System);
1940     CYSetProperty(context, System, CYJSString("args"), CYJSNull(context));
1941     //CYSetProperty(context, System, CYJSString("global"), global);
1942     CYSetProperty(context, System, CYJSString("print"), &System_print);
1943
1944 #ifdef __APPLE__
1945     if (&JSWeakObjectMapCreate != NULL) {
1946         JSWeakObjectMapRef weak(JSWeakObjectMapCreate(context, NULL, &CYDestroyWeak));
1947         CYSetProperty(context, cy, weak_s, CYCastJSValue(context, reinterpret_cast<uintptr_t>(weak)));
1948     }
1949 #endif
1950
1951     if (CYBridgeEntry *entry = CYBridgeHash("1dlerror", 8))
1952         entry->cache_ = new cy::Functor(entry->value_, reinterpret_cast<void (*)()>(&dlerror));
1953
1954     for (CYHook *hook : GetHooks())
1955         if (hook->SetupContext != NULL)
1956             (*hook->SetupContext)(context);
1957
1958     CYArrayPush(context, alls, cycript);
1959 }
1960
1961 static JSGlobalContextRef context_;
1962
1963 JSGlobalContextRef CYGetJSContext() {
1964     CYInitializeDynamic();
1965
1966     if (context_ == NULL) {
1967         context_ = JSGlobalContextCreate(Global_);
1968         CYSetupContext(context_);
1969     }
1970
1971     return context_;
1972 }
1973
1974 void CYDestroyContext() {
1975     if (context_ == NULL)
1976         return;
1977     JSGlobalContextRelease(context_);
1978     context_ = NULL;
1979 }