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