Execute.cpp

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2013  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU General Public License, Version 3 {{{ */
   6 /*
   7  * Cycript is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published
   9  * by the Free Software Foundation, either version 3 of the License,
  10  * or (at your option) any later version.
  11  *
  12  * Cycript is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with Cycript.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 #include "Internal.hpp"
  23
  24 #include <dlfcn.h>
  25
  26 #include "cycript.hpp"
  27
  28 #include "sig/parse.hpp"
  29 #include "sig/ffi_type.hpp"
  30
  31 #include "Pooling.hpp"
  32 #include "Execute.hpp"
  33
  34 #include <sys/mman.h>
  35
  36 #include <iostream>
  37 #include <set>
  38 #include <map>
  39 #include <iomanip>
  40 #include <sstream>
  41 #include <cmath>
  42
  43 #include "Parser.hpp"
  44 #include "Cycript.tab.hh"
  45
  46 #include "Error.hpp"
  47 #include "JavaScript.hpp"
  48 #include "String.hpp"
  49
  50 struct CYHooks *hooks_;
  51
  52 /* JavaScript Properties {{{ */
  53 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, size_t index) {
  54     JSValueRef exception(NULL);
  55     JSValueRef value(JSObjectGetPropertyAtIndex(context, object, index, &exception));
  56     CYThrow(context, exception);
  57     return value;
  58 }
  59
  60 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, JSStringRef name) {
  61     JSValueRef exception(NULL);
  62     JSValueRef value(JSObjectGetProperty(context, object, name, &exception));
  63     CYThrow(context, exception);
  64     return value;
  65 }
  66
  67 void CYSetProperty(JSContextRef context, JSObjectRef object, size_t index, JSValueRef value) {
  68     JSValueRef exception(NULL);
  69     JSObjectSetPropertyAtIndex(context, object, index, value, &exception);
  70     CYThrow(context, exception);
  71 }
  72
  73 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef value, JSPropertyAttributes attributes) {
  74     JSValueRef exception(NULL);
  75     JSObjectSetProperty(context, object, name, value, attributes, &exception);
  76     CYThrow(context, exception);
  77 }
  78
  79 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef (*callback)(JSContextRef, JSObjectRef, JSObjectRef, size_t, const JSValueRef[], JSValueRef *), JSPropertyAttributes attributes) {
  80     CYSetProperty(context, object, name, JSObjectMakeFunctionWithCallback(context, name, callback), attributes);
  81 }
  82 /* }}} */
  83 /* JavaScript Strings {{{ */
  84 JSStringRef CYCopyJSString(const char *value) {
  85     return value == NULL ? NULL : JSStringCreateWithUTF8CString(value);
  86 }
  87
  88 JSStringRef CYCopyJSString(JSStringRef value) {
  89     return value == NULL ? NULL : JSStringRetain(value);
  90 }
  91
  92 JSStringRef CYCopyJSString(CYUTF8String value) {
  93     // XXX: this is very wrong; it needs to convert to UTF16 and then create from there
  94     return CYCopyJSString(value.data);
  95 }
  96
  97 JSStringRef CYCopyJSString(JSContextRef context, JSValueRef value) {
  98     if (JSValueIsNull(context, value))
  99         return NULL;
 100     JSValueRef exception(NULL);
 101     JSStringRef string(JSValueToStringCopy(context, value, &exception));
 102     CYThrow(context, exception);
 103     return string;
 104 }
 105
 106 static CYUTF16String CYCastUTF16String(JSStringRef value) {
 107     return CYUTF16String(JSStringGetCharactersPtr(value), JSStringGetLength(value));
 108 }
 109
 110 CYUTF8String CYPoolUTF8String(CYPool &pool, JSContextRef context, JSStringRef value) {
 111     return CYPoolUTF8String(pool, CYCastUTF16String(value));
 112 }
 113
 114 const char *CYPoolCString(CYPool &pool, JSContextRef context, JSStringRef value) {
 115     CYUTF8String utf8(CYPoolUTF8String(pool, context, value));
 116     _assert(memchr(utf8.data, '\0', utf8.size) == NULL);
 117     return utf8.data;
 118 }
 119
 120 const char *CYPoolCString(CYPool &pool, JSContextRef context, JSValueRef value) {
 121     return JSValueIsNull(context, value) ? NULL : CYPoolCString(pool, context, CYJSString(context, value));
 122 }
 123 /* }}} */
 124 /* Index Offsets {{{ */
 125 size_t CYGetIndex(CYPool &pool, JSContextRef context, JSStringRef value) {
 126     return CYGetIndex(CYPoolUTF8String(pool, context, value));
 127 }
 128 /* }}} */
 129
 130 static JSClassRef All_;
 131 static JSClassRef Context_;
 132 JSClassRef Functor_;
 133 static JSClassRef Global_;
 134 static JSClassRef Pointer_;
 135 static JSClassRef Struct_;
 136
 137 JSStringRef Array_s;
 138 JSStringRef cy_s;
 139 JSStringRef length_s;
 140 JSStringRef message_s;
 141 JSStringRef name_s;
 142 JSStringRef pop_s;
 143 JSStringRef prototype_s;
 144 JSStringRef push_s;
 145 JSStringRef splice_s;
 146 JSStringRef toCYON_s;
 147 JSStringRef toJSON_s;
 148 JSStringRef toPointer_s;
 149 JSStringRef toString_s;
 150
 151 static JSStringRef Result_;
 152
 153 void CYFinalize(JSObjectRef object) {
 154     CYData *internal(reinterpret_cast<CYData *>(JSObjectGetPrivate(object)));
 155     _assert(internal->count_ != _not(unsigned));
 156     if (--internal->count_ == 0)
 157         delete internal;
 158 }
 159
 160 void Structor_(CYPool &pool, sig::Type *&type) {
 161     if (
 162         type->primitive == sig::pointer_P &&
 163         type->data.data.type != NULL &&
 164         type->data.data.type->primitive == sig::struct_P &&
 165         type->data.data.type->name != NULL &&
 166         strcmp(type->data.data.type->name, "_objc_class") == 0
 167     ) {
 168         type->primitive = sig::typename_P;
 169         type->data.data.type = NULL;
 170         return;
 171     }
 172
 173     if (type->primitive != sig::struct_P || type->name == NULL)
 174         return;
 175
 176     size_t length(strlen(type->name));
 177     char keyed[length + 2];
 178     memcpy(keyed + 1, type->name, length + 1);
 179
 180     static const char *modes = "34";
 181     for (size_t i(0); i != 2; ++i) {
 182         char mode(modes[i]);
 183         keyed[0] = mode;
 184
 185         if (CYBridgeEntry *entry = CYBridgeHash(keyed, length + 1))
 186             switch (mode) {
 187                 case '3':
 188                     sig::Parse(pool, &type->data.signature, entry->value_, &Structor_);
 189                 break;
 190
 191                 case '4': {
 192                     sig::Signature signature;
 193                     sig::Parse(pool, &signature, entry->value_, &Structor_);
 194                     type = signature.elements[0].type;
 195                 } break;
 196             }
 197     }
 198 }
 199
 200 JSClassRef Type_privateData::Class_;
 201
 202 struct Context :
 203     CYData
 204 {
 205     JSGlobalContextRef context_;
 206
 207     Context(JSGlobalContextRef context) :
 208         context_(context)
 209     {
 210     }
 211 };
 212
 213 struct Pointer :
 214     CYOwned
 215 {
 216     Type_privateData *type_;
 217     size_t length_;
 218
 219     Pointer(void *value, JSContextRef context, JSObjectRef owner, size_t length, sig::Type *type) :
 220         CYOwned(value, context, owner),
 221         type_(new(*pool_) Type_privateData(type)),
 222         length_(length)
 223     {
 224     }
 225 };
 226
 227 struct Struct_privateData :
 228     CYOwned
 229 {
 230     Type_privateData *type_;
 231
 232     Struct_privateData(JSContextRef context, JSObjectRef owner) :
 233         CYOwned(NULL, context, owner)
 234     {
 235     }
 236 };
 237
 238 typedef std::map<const char *, Type_privateData *, CYCStringLess> TypeMap;
 239 static TypeMap Types_;
 240
 241 JSObjectRef CYMakeStruct(JSContextRef context, void *data, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 242     Struct_privateData *internal(new Struct_privateData(context, owner));
 243     CYPool &pool(*internal->pool_);
 244     Type_privateData *typical(new(pool) Type_privateData(type, ffi));
 245     internal->type_ = typical;
 246
 247     if (owner != NULL)
 248         internal->value_ = data;
 249     else {
 250         size_t size(typical->GetFFI()->size);
 251         void *copy(internal->pool_->malloc<void>(size));
 252         memcpy(copy, data, size);
 253         internal->value_ = copy;
 254     }
 255
 256     return JSObjectMake(context, Struct_, internal);
 257 }
 258
 259 static void *CYCastSymbol(const char *name) {
 260     return dlsym(RTLD_DEFAULT, name);
 261 }
 262
 263 JSValueRef CYCastJSValue(JSContextRef context, bool value) {
 264     return JSValueMakeBoolean(context, value);
 265 }
 266
 267 JSValueRef CYCastJSValue(JSContextRef context, double value) {
 268     return JSValueMakeNumber(context, value);
 269 }
 270
 271 #define CYCastJSValue_(Type_) \
 272     JSValueRef CYCastJSValue(JSContextRef context, Type_ value) { \
 273         return JSValueMakeNumber(context, static_cast<double>(value)); \
 274     }
 275
 276 CYCastJSValue_(int)
 277 CYCastJSValue_(unsigned int)
 278 CYCastJSValue_(long int)
 279 CYCastJSValue_(long unsigned int)
 280 CYCastJSValue_(long long int)
 281 CYCastJSValue_(long long unsigned int)
 282
 283 JSValueRef CYJSUndefined(JSContextRef context) {
 284     return JSValueMakeUndefined(context);
 285 }
 286
 287 double CYCastDouble(JSContextRef context, JSValueRef value) {
 288     JSValueRef exception(NULL);
 289     double number(JSValueToNumber(context, value, &exception));
 290     CYThrow(context, exception);
 291     return number;
 292 }
 293
 294 bool CYCastBool(JSContextRef context, JSValueRef value) {
 295     return JSValueToBoolean(context, value);
 296 }
 297
 298 JSValueRef CYJSNull(JSContextRef context) {
 299     return JSValueMakeNull(context);
 300 }
 301
 302 JSValueRef CYCastJSValue(JSContextRef context, JSStringRef value) {
 303     return value == NULL ? CYJSNull(context) : JSValueMakeString(context, value);
 304 }
 305
 306 JSValueRef CYCastJSValue(JSContextRef context, const char *value) {
 307     return CYCastJSValue(context, CYJSString(value));
 308 }
 309
 310 JSObjectRef CYCastJSObject(JSContextRef context, JSValueRef value) {
 311     JSValueRef exception(NULL);
 312     JSObjectRef object(JSValueToObject(context, value, &exception));
 313     CYThrow(context, exception);
 314     return object;
 315 }
 316
 317 JSValueRef CYCallAsFunction(JSContextRef context, JSObjectRef function, JSObjectRef _this, size_t count, const JSValueRef arguments[]) {
 318     JSValueRef exception(NULL);
 319     JSValueRef value(JSObjectCallAsFunction(context, function, _this, count, arguments, &exception));
 320     CYThrow(context, exception);
 321     return value;
 322 }
 323
 324 bool CYIsCallable(JSContextRef context, JSValueRef value) {
 325     return value != NULL && JSValueIsObject(context, value) && JSObjectIsFunction(context, (JSObjectRef) value);
 326 }
 327
 328 static JSValueRef System_print(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 329     if (count == 0)
 330         printf("\n");
 331     else {
 332         CYPool pool;
 333         printf("%s\n", CYPoolCString(pool, context, arguments[0]));
 334     }
 335
 336     return CYJSUndefined(context);
 337 } CYCatch(NULL) }
 338
 339 static size_t Nonce_(0);
 340
 341 static JSValueRef $cyq(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 342     CYPool pool;
 343     const char *name(pool.strcat(CYPoolCString(pool, context, arguments[0]), pool.itoa(Nonce_++), NULL));
 344     return CYCastJSValue(context, name);
 345 }
 346
 347 static JSValueRef Cycript_gc_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 348     JSGarbageCollect(context);
 349     return CYJSUndefined(context);
 350 }
 351
 352 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSValueRef value, JSValueRef *exception) { CYTry {
 353     switch (JSType type = JSValueGetType(context, value)) {
 354         case kJSTypeUndefined:
 355             return "undefined";
 356         case kJSTypeNull:
 357             return "null";
 358         case kJSTypeBoolean:
 359             return CYCastBool(context, value) ? "true" : "false";
 360
 361         case kJSTypeNumber: {
 362             std::ostringstream str;
 363             CYNumerify(str, CYCastDouble(context, value));
 364             std::string value(str.str());
 365             return pool.strmemdup(value.c_str(), value.size());
 366         } break;
 367
 368         case kJSTypeString: {
 369             std::ostringstream str;
 370             CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, value)));
 371             CYStringify(str, string.data, string.size);
 372             std::string value(str.str());
 373             return pool.strmemdup(value.c_str(), value.size());
 374         } break;
 375
 376         case kJSTypeObject:
 377             return CYPoolCCYON(pool, context, (JSObjectRef) value);
 378         default:
 379             throw CYJSError(context, "JSValueGetType() == 0x%x", type);
 380     }
 381 } CYCatch(NULL) }
 382
 383 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSValueRef value) {
 384     JSValueRef exception(NULL);
 385     const char *cyon(CYPoolCCYON(pool, context, value, &exception));
 386     CYThrow(context, exception);
 387     return cyon;
 388 }
 389
 390 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSObjectRef object) {
 391     JSValueRef toCYON(CYGetProperty(context, object, toCYON_s));
 392     if (CYIsCallable(context, toCYON)) {
 393         JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toCYON, object, 0, NULL));
 394         _assert(value != NULL);
 395         return CYPoolCString(pool, context, value);
 396     }
 397
 398     JSValueRef toJSON(CYGetProperty(context, object, toJSON_s));
 399     if (CYIsCallable(context, toJSON)) {
 400         JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 401         JSValueRef exception(NULL);
 402         const char *cyon(CYPoolCCYON(pool, context, CYCallAsFunction(context, (JSObjectRef) toJSON, object, 1, arguments), &exception));
 403         CYThrow(context, exception);
 404         return cyon;
 405     }
 406
 407     if (JSObjectIsFunction(context, object)) {
 408         JSValueRef toString(CYGetProperty(context, object, toString_s));
 409         if (CYIsCallable(context, toString)) {
 410             JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 411             JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toString, object, 1, arguments));
 412             _assert(value != NULL);
 413             return CYPoolCString(pool, context, value);
 414         }
 415     }
 416
 417     std::ostringstream str;
 418
 419     str << '{';
 420
 421     // XXX: this is, sadly, going to leak
 422     JSPropertyNameArrayRef names(JSObjectCopyPropertyNames(context, object));
 423
 424     bool comma(false);
 425
 426     for (size_t index(0), count(JSPropertyNameArrayGetCount(names)); index != count; ++index) {
 427         JSStringRef name(JSPropertyNameArrayGetNameAtIndex(names, index));
 428         JSValueRef value(CYGetProperty(context, object, name));
 429
 430         if (comma)
 431             str << ',';
 432         else
 433             comma = true;
 434
 435         CYUTF8String string(CYPoolUTF8String(pool, context, name));
 436         if (CYIsKey(string))
 437             str << string.data;
 438         else
 439             CYStringify(str, string.data, string.size);
 440
 441         str << ':' << CYPoolCCYON(pool, context, value);
 442     }
 443
 444     str << '}';
 445
 446     JSPropertyNameArrayRelease(names);
 447
 448     std::string string(str.str());
 449     return pool.strmemdup(string.c_str(), string.size());
 450 }
 451
 452 static JSValueRef Array_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 453     CYPool pool;
 454     std::ostringstream str;
 455
 456     str << '[';
 457
 458     JSValueRef length(CYGetProperty(context, _this, length_s));
 459     bool comma(false);
 460
 461     for (size_t index(0), count(CYCastDouble(context, length)); index != count; ++index) {
 462         JSValueRef value(CYGetProperty(context, _this, index));
 463
 464         if (comma)
 465             str << ',';
 466         else
 467             comma = true;
 468
 469         if (!JSValueIsUndefined(context, value))
 470             str << CYPoolCCYON(pool, context, value);
 471         else {
 472             str << ',';
 473             comma = false;
 474         }
 475     }
 476
 477     str << ']';
 478
 479     std::string value(str.str());
 480     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 481 } CYCatch(NULL) }
 482
 483 static JSValueRef String_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 484     CYPool pool;
 485     std::ostringstream str;
 486
 487     CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, _this)));
 488     CYStringify(str, string.data, string.size);
 489
 490     std::string value(str.str());
 491     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 492 } CYCatch(NULL) }
 493
 494 JSObjectRef CYMakePointer(JSContextRef context, void *pointer, size_t length, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 495     Pointer *internal(new Pointer(pointer, context, owner, length, type));
 496     return JSObjectMake(context, Pointer_, internal);
 497 }
 498
 499 static JSObjectRef CYMakeFunctor(JSContextRef context, void (*function)(), const char *type) {
 500     return JSObjectMake(context, Functor_, new cy::Functor(type, function));
 501 }
 502
 503 static JSObjectRef CYMakeFunctor(JSContextRef context, const char *symbol, const char *type, void **cache) {
 504     cy::Functor *internal;
 505     if (*cache != NULL)
 506         internal = reinterpret_cast<cy::Functor *>(*cache);
 507     else {
 508         void (*function)()(reinterpret_cast<void (*)()>(CYCastSymbol(symbol)));
 509         if (function == NULL)
 510             return NULL;
 511
 512         internal = new cy::Functor(type, function);
 513         *cache = internal;
 514     }
 515
 516     ++internal->count_;
 517     return JSObjectMake(context, Functor_, internal);
 518 }
 519
 520 static bool CYGetOffset(CYPool &pool, JSContextRef context, JSStringRef value, ssize_t &index) {
 521     return CYGetOffset(CYPoolCString(pool, context, value), index);
 522 }
 523
 524 void *CYCastPointer_(JSContextRef context, JSValueRef value) {
 525     switch (JSValueGetType(context, value)) {
 526         case kJSTypeNull:
 527             return NULL;
 528         case kJSTypeObject: {
 529             JSObjectRef object((JSObjectRef) value);
 530             if (JSValueIsObjectOfClass(context, value, Pointer_)) {
 531                 Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 532                 return internal->value_;
 533             }
 534             JSValueRef toPointer(CYGetProperty(context, object, toPointer_s));
 535             if (CYIsCallable(context, toPointer)) {
 536                 JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toPointer, object, 0, NULL));
 537                 _assert(value != NULL);
 538                 return CYCastPointer_(context, value);
 539             }
 540         } default:
 541             double number(CYCastDouble(context, value));
 542             if (std::isnan(number))
 543                 throw CYJSError(context, "cannot convert value to pointer");
 544             return reinterpret_cast<void *>(static_cast<uintptr_t>(static_cast<long long>(number)));
 545     }
 546 }
 547
 548 void CYPoolFFI(CYPool *pool, JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, JSValueRef value) {
 549     switch (type->primitive) {
 550         case sig::boolean_P:
 551             *reinterpret_cast<bool *>(data) = JSValueToBoolean(context, value);
 552         break;
 553
 554 #define CYPoolFFI_(primitive, native) \
 555         case sig::primitive ## _P: \
 556             *reinterpret_cast<native *>(data) = CYCastDouble(context, value); \
 557         break;
 558
 559         CYPoolFFI_(uchar, unsigned char)
 560         CYPoolFFI_(char, char)
 561         CYPoolFFI_(ushort, unsigned short)
 562         CYPoolFFI_(short, short)
 563         CYPoolFFI_(ulong, unsigned long)
 564         CYPoolFFI_(long, long)
 565         CYPoolFFI_(uint, unsigned int)
 566         CYPoolFFI_(int, int)
 567         CYPoolFFI_(ulonglong, unsigned long long)
 568         CYPoolFFI_(longlong, long long)
 569         CYPoolFFI_(float, float)
 570         CYPoolFFI_(double, double)
 571
 572         case sig::array_P: {
 573             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 574             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 575             for (size_t index(0); index != type->data.data.size; ++index) {
 576                 ffi_type *field(ffi->elements[index]);
 577
 578                 JSValueRef rhs;
 579                 if (aggregate == NULL)
 580                     rhs = value;
 581                 else {
 582                     rhs = CYGetProperty(context, aggregate, index);
 583                     if (JSValueIsUndefined(context, rhs))
 584                         throw CYJSError(context, "unable to extract array value");
 585                 }
 586
 587                 CYPoolFFI(pool, context, type->data.data.type, field, base, rhs);
 588                 // XXX: alignment?
 589                 base += field->size;
 590             }
 591         } break;
 592
 593         case sig::pointer_P:
 594             *reinterpret_cast<void **>(data) = CYCastPointer<void *>(context, value);
 595         break;
 596
 597         case sig::string_P:
 598             _assert(pool != NULL);
 599             *reinterpret_cast<const char **>(data) = CYPoolCString(*pool, context, value);
 600         break;
 601
 602         case sig::struct_P: {
 603             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 604             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 605             for (size_t index(0); index != type->data.signature.count; ++index) {
 606                 sig::Element *element(&type->data.signature.elements[index]);
 607                 ffi_type *field(ffi->elements[index]);
 608
 609                 JSValueRef rhs;
 610                 if (aggregate == NULL)
 611                     rhs = value;
 612                 else {
 613                     rhs = CYGetProperty(context, aggregate, index);
 614                     if (JSValueIsUndefined(context, rhs)) {
 615                         if (element->name != NULL)
 616                             rhs = CYGetProperty(context, aggregate, CYJSString(element->name));
 617                         else
 618                             goto undefined;
 619                         if (JSValueIsUndefined(context, rhs)) undefined:
 620                             throw CYJSError(context, "unable to extract structure value");
 621                     }
 622                 }
 623
 624                 CYPoolFFI(pool, context, element->type, field, base, rhs);
 625                 // XXX: alignment?
 626                 base += field->size;
 627             }
 628         } break;
 629
 630         case sig::void_P:
 631         break;
 632
 633         default:
 634             if (hooks_ != NULL && hooks_->PoolFFI != NULL)
 635                 if ((*hooks_->PoolFFI)(pool, context, type, ffi, data, value))
 636                     return;
 637
 638             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 639     }
 640 }
 641
 642 JSValueRef CYFromFFI(JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, bool initialize, JSObjectRef owner) {
 643     switch (type->primitive) {
 644         case sig::boolean_P:
 645             return CYCastJSValue(context, *reinterpret_cast<bool *>(data));
 646
 647 #define CYFromFFI_(primitive, native) \
 648         case sig::primitive ## _P: \
 649             return CYCastJSValue(context, *reinterpret_cast<native *>(data)); \
 650
 651         CYFromFFI_(uchar, unsigned char)
 652         CYFromFFI_(char, char)
 653         CYFromFFI_(ushort, unsigned short)
 654         CYFromFFI_(short, short)
 655         CYFromFFI_(ulong, unsigned long)
 656         CYFromFFI_(long, long)
 657         CYFromFFI_(uint, unsigned int)
 658         CYFromFFI_(int, int)
 659         CYFromFFI_(ulonglong, unsigned long long)
 660         CYFromFFI_(longlong, long long)
 661         CYFromFFI_(float, float)
 662         CYFromFFI_(double, double)
 663
 664         case sig::array_P:
 665             if (void *pointer = data)
 666                 return CYMakePointer(context, pointer, type->data.data.size, type->data.data.type, NULL, owner);
 667             else goto null;
 668
 669         case sig::pointer_P:
 670             if (void *pointer = *reinterpret_cast<void **>(data))
 671                 return CYMakePointer(context, pointer, _not(size_t), type->data.data.type, NULL, owner);
 672             else goto null;
 673
 674         case sig::string_P:
 675             if (char *utf8 = *reinterpret_cast<char **>(data))
 676                 return CYCastJSValue(context, utf8);
 677             else goto null;
 678
 679         case sig::struct_P:
 680             return CYMakeStruct(context, data, type, ffi, owner);
 681         case sig::void_P:
 682             return CYJSUndefined(context);
 683
 684         null:
 685             return CYJSNull(context);
 686         default:
 687             if (hooks_ != NULL && hooks_->FromFFI != NULL)
 688                 if (JSValueRef value = (*hooks_->FromFFI)(context, type, ffi, data, initialize, owner))
 689                     return value;
 690
 691             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 692     }
 693 }
 694
 695 void CYExecuteClosure(ffi_cif *cif, void *result, void **arguments, void *arg, JSValueRef (*adapter)(JSContextRef, size_t, JSValueRef[], JSObjectRef)) {
 696     Closure_privateData *internal(reinterpret_cast<Closure_privateData *>(arg));
 697
 698     JSContextRef context(internal->context_);
 699
 700     size_t count(internal->cif_.nargs);
 701     JSValueRef values[count];
 702
 703     for (size_t index(0); index != count; ++index)
 704         values[index] = CYFromFFI(context, internal->signature_.elements[1 + index].type, internal->cif_.arg_types[index], arguments[index]);
 705
 706     JSValueRef value(adapter(context, count, values, internal->function_));
 707     CYPoolFFI(NULL, context, internal->signature_.elements[0].type, internal->cif_.rtype, result, value);
 708 }
 709
 710 static JSValueRef FunctionAdapter_(JSContextRef context, size_t count, JSValueRef values[], JSObjectRef function) {
 711     return CYCallAsFunction(context, function, NULL, count, values);
 712 }
 713
 714 static void FunctionClosure_(ffi_cif *cif, void *result, void **arguments, void *arg) {
 715     CYExecuteClosure(cif, result, arguments, arg, &FunctionAdapter_);
 716 }
 717
 718 Closure_privateData *CYMakeFunctor_(JSContextRef context, JSObjectRef function, const char *type, void (*callback)(ffi_cif *, void *, void **, void *)) {
 719     // XXX: in case of exceptions this will leak
 720     // XXX: in point of fact, this may /need/ to leak :(
 721     Closure_privateData *internal(new Closure_privateData(context, function, type));
 722
 723 #if defined(__APPLE__) && defined(__arm__)
 724     void *executable;
 725     ffi_closure *writable(reinterpret_cast<ffi_closure *>(ffi_closure_alloc(sizeof(ffi_closure), &executable)));
 726
 727     ffi_status status(ffi_prep_closure_loc(writable, &internal->cif_, callback, internal, executable));
 728     _assert(status == FFI_OK);
 729
 730     internal->value_ = executable;
 731 #else
 732     ffi_closure *closure((ffi_closure *) _syscall(mmap(
 733         NULL, sizeof(ffi_closure),
 734         PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE,
 735         -1, 0
 736     )));
 737
 738     ffi_status status(ffi_prep_closure(closure, &internal->cif_, callback, internal));
 739     _assert(status == FFI_OK);
 740
 741     _syscall(mprotect(closure, sizeof(*closure), PROT_READ | PROT_EXEC));
 742
 743     internal->value_ = closure;
 744 #endif
 745
 746     return internal;
 747 }
 748
 749 static JSObjectRef CYMakeFunctor(JSContextRef context, JSObjectRef function, const char *type) {
 750     Closure_privateData *internal(CYMakeFunctor_(context, function, type, &FunctionClosure_));
 751     JSObjectRef object(JSObjectMake(context, Functor_, internal));
 752     // XXX: see above notes about needing to leak
 753     JSValueProtect(CYGetJSContext(context), object);
 754     return object;
 755 }
 756
 757 JSObjectRef CYGetCachedObject(JSContextRef context, JSStringRef name) {
 758     return CYCastJSObject(context, CYGetProperty(context, CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s)), name));
 759 }
 760
 761 static JSObjectRef CYMakeFunctor(JSContextRef context, JSValueRef value, const char *type) {
 762     JSObjectRef Function(CYGetCachedObject(context, CYJSString("Function")));
 763
 764     JSValueRef exception(NULL);
 765     bool function(JSValueIsInstanceOfConstructor(context, value, Function, &exception));
 766     CYThrow(context, exception);
 767
 768     if (function) {
 769         JSObjectRef function(CYCastJSObject(context, value));
 770         return CYMakeFunctor(context, function, type);
 771     } else {
 772         void (*function)()(CYCastPointer<void (*)()>(context, value));
 773         return CYMakeFunctor(context, function, type);
 774     }
 775 }
 776
 777 static bool Index_(CYPool &pool, JSContextRef context, Struct_privateData *internal, JSStringRef property, ssize_t &index, uint8_t *&base) {
 778     Type_privateData *typical(internal->type_);
 779     sig::Type *type(typical->type_);
 780     if (type == NULL)
 781         return false;
 782
 783     const char *name(CYPoolCString(pool, context, property));
 784     size_t length(strlen(name));
 785     double number(CYCastDouble(name, length));
 786
 787     size_t count(type->data.signature.count);
 788
 789     if (std::isnan(number)) {
 790         if (property == NULL)
 791             return false;
 792
 793         sig::Element *elements(type->data.signature.elements);
 794
 795         for (size_t local(0); local != count; ++local) {
 796             sig::Element *element(&elements[local]);
 797             if (element->name != NULL && strcmp(name, element->name) == 0) {
 798                 index = local;
 799                 goto base;
 800             }
 801         }
 802
 803         return false;
 804     } else {
 805         index = static_cast<ssize_t>(number);
 806         if (index != number || index < 0 || static_cast<size_t>(index) >= count)
 807             return false;
 808     }
 809
 810   base:
 811     ffi_type **elements(typical->GetFFI()->elements);
 812
 813     base = reinterpret_cast<uint8_t *>(internal->value_);
 814     for (ssize_t local(0); local != index; ++local)
 815         base += elements[local]->size;
 816
 817     return true;
 818 }
 819
 820 static JSValueRef Pointer_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 821     CYPool pool;
 822     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 823
 824     if (JSStringIsEqual(property, length_s))
 825         return internal->length_ == _not(size_t) ? CYJSUndefined(context) : CYCastJSValue(context, internal->length_);
 826
 827     Type_privateData *typical(internal->type_);
 828
 829     if (typical->type_ == NULL)
 830         return NULL;
 831
 832     ssize_t offset;
 833     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 834         offset = 0;
 835     else if (!CYGetOffset(pool, context, property, offset))
 836         return NULL;
 837
 838     ffi_type *ffi(typical->GetFFI());
 839
 840     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 841     base += ffi->size * offset;
 842
 843     JSObjectRef owner(internal->GetOwner() ?: object);
 844     return CYFromFFI(context, typical->type_, ffi, base, false, owner);
 845 } CYCatch(NULL) }
 846
 847 static bool Pointer_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 848     CYPool pool;
 849     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 850     Type_privateData *typical(internal->type_);
 851
 852     if (typical->type_ == NULL)
 853         return false;
 854
 855     ssize_t offset;
 856     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 857         offset = 0;
 858     else if (!CYGetOffset(pool, context, property, offset))
 859         return false;
 860
 861     ffi_type *ffi(typical->GetFFI());
 862
 863     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 864     base += ffi->size * offset;
 865
 866     CYPoolFFI(NULL, context, typical->type_, ffi, base, value);
 867     return true;
 868 } CYCatch(false) }
 869
 870 static JSValueRef Struct_callAsFunction_$cya(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 871     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(_this)));
 872     Type_privateData *typical(internal->type_);
 873     return CYMakePointer(context, internal->value_, _not(size_t), typical->type_, typical->ffi_, _this);
 874 }
 875
 876 static JSValueRef Struct_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 877     CYPool pool;
 878     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 879     Type_privateData *typical(internal->type_);
 880
 881     ssize_t index;
 882     uint8_t *base;
 883
 884     if (!Index_(pool, context, internal, property, index, base))
 885         return NULL;
 886
 887     JSObjectRef owner(internal->GetOwner() ?: object);
 888
 889     return CYFromFFI(context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, false, owner);
 890 } CYCatch(NULL) }
 891
 892 static bool Struct_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 893     CYPool pool;
 894     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 895     Type_privateData *typical(internal->type_);
 896
 897     ssize_t index;
 898     uint8_t *base;
 899
 900     if (!Index_(pool, context, internal, property, index, base))
 901         return false;
 902
 903     CYPoolFFI(NULL, context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, value);
 904     return true;
 905 } CYCatch(false) }
 906
 907 static void Struct_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
 908     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 909     Type_privateData *typical(internal->type_);
 910     sig::Type *type(typical->type_);
 911
 912     if (type == NULL)
 913         return;
 914
 915     size_t count(type->data.signature.count);
 916     sig::Element *elements(type->data.signature.elements);
 917
 918     char number[32];
 919
 920     for (size_t index(0); index != count; ++index) {
 921         const char *name;
 922         name = elements[index].name;
 923
 924         if (name == NULL) {
 925             sprintf(number, "%zu", index);
 926             name = number;
 927         }
 928
 929         JSPropertyNameAccumulatorAddName(names, CYJSString(name));
 930     }
 931 }
 932
 933 JSValueRef CYCallFunction(CYPool &pool, JSContextRef context, size_t setups, void *setup[], size_t count, const JSValueRef arguments[], bool initialize, JSValueRef *exception, sig::Signature *signature, ffi_cif *cif, void (*function)()) { CYTry {
 934     if (setups + count != signature->count - 1)
 935         throw CYJSError(context, "incorrect number of arguments to ffi function");
 936
 937     size_t size(setups + count);
 938     void *values[size];
 939     memcpy(values, setup, sizeof(void *) * setups);
 940
 941     for (size_t index(setups); index != size; ++index) {
 942         sig::Element *element(&signature->elements[index + 1]);
 943         ffi_type *ffi(cif->arg_types[index]);
 944         // XXX: alignment?
 945         values[index] = new(pool) uint8_t[ffi->size];
 946         CYPoolFFI(&pool, context, element->type, ffi, values[index], arguments[index - setups]);
 947     }
 948
 949     uint8_t value[cif->rtype->size];
 950
 951     if (hooks_ != NULL && hooks_->CallFunction != NULL)
 952         (*hooks_->CallFunction)(context, cif, function, value, values);
 953     else
 954         ffi_call(cif, function, value, values);
 955
 956     return CYFromFFI(context, signature->elements[0].type, cif->rtype, value, initialize);
 957 } CYCatch(NULL) }
 958
 959 static JSValueRef Functor_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 960     CYPool pool;
 961     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
 962     return CYCallFunction(pool, context, 0, NULL, count, arguments, false, exception, &internal->signature_, &internal->cif_, internal->GetValue());
 963 }
 964
 965 JSObjectRef CYMakeType(JSContextRef context, const char *type) {
 966     Type_privateData *internal(new Type_privateData(type));
 967     return JSObjectMake(context, Type_privateData::Class_, internal);
 968 }
 969
 970 JSObjectRef CYMakeType(JSContextRef context, sig::Type *type) {
 971     Type_privateData *internal(new Type_privateData(type));
 972     return JSObjectMake(context, Type_privateData::Class_, internal);
 973 }
 974
 975 static JSValueRef All_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 976     JSObjectRef global(CYGetGlobalObject(context));
 977     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
 978     JSObjectRef alls(CYCastJSObject(context, CYGetProperty(context, cycript, CYJSString("alls"))));
 979
 980     for (size_t i(0), count(CYArrayLength(context, alls)); i != count; ++i)
 981         if (JSObjectRef space = CYCastJSObject(context, CYArrayGet(context, alls, count - i - 1)))
 982             if (JSValueRef value = CYGetProperty(context, space, property))
 983                 if (!JSValueIsUndefined(context, value))
 984                     return value;
 985
 986     CYPool pool;
 987     CYUTF8String name(CYPoolUTF8String(pool, context, property));
 988
 989     size_t length(name.size);
 990     char keyed[length + 2];
 991     memcpy(keyed + 1, name.data, length + 1);
 992
 993     static const char *modes = "0124";
 994     for (size_t i(0); i != 4; ++i) {
 995         char mode(modes[i]);
 996         keyed[0] = mode;
 997
 998         if (CYBridgeEntry *entry = CYBridgeHash(keyed, length + 1))
 999             switch (mode) {
1000                 case '0':
1001                     return JSEvaluateScript(CYGetJSContext(context), CYJSString(entry->value_), NULL, NULL, 0, NULL);
1002
1003                 case '1':
1004                     return CYMakeFunctor(context, name.data, entry->value_, &entry->cache_);
1005
1006                 case '2':
1007                     if (void *symbol = CYCastSymbol(name.data)) {
1008                         // XXX: this is horrendously inefficient
1009                         sig::Signature signature;
1010                         sig::Parse(pool, &signature, entry->value_, &Structor_);
1011                         ffi_cif cif;
1012                         sig::sig_ffi_cif(pool, &sig::ObjectiveC, &signature, &cif);
1013                         return CYFromFFI(context, signature.elements[0].type, cif.rtype, symbol);
1014                     } else return NULL;
1015
1016                 // XXX: implement case 3
1017                 case '4':
1018                     return CYMakeType(context, entry->value_);
1019             }
1020     }
1021
1022     return NULL;
1023 } CYCatch(NULL) }
1024
1025 static void All_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
1026     JSObjectRef global(CYGetGlobalObject(context));
1027     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
1028     JSObjectRef alls(CYCastJSObject(context, CYGetProperty(context, cycript, CYJSString("alls"))));
1029
1030     for (size_t i(0), count(CYArrayLength(context, alls)); i != count; ++i)
1031         if (JSObjectRef space = CYCastJSObject(context, CYArrayGet(context, alls, count - i - 1))) {
1032             JSPropertyNameArrayRef subset(JSObjectCopyPropertyNames(context, space));
1033             for (size_t index(0), count(JSPropertyNameArrayGetCount(subset)); index != count; ++index)
1034                 JSPropertyNameAccumulatorAddName(names, JSPropertyNameArrayGetNameAtIndex(subset, index));
1035             JSPropertyNameArrayRelease(subset);
1036         }
1037 }
1038
1039 static JSObjectRef Pointer_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1040     if (count != 2)
1041         throw CYJSError(context, "incorrect number of arguments to Pointer constructor");
1042
1043     CYPool pool;
1044
1045     void *value(CYCastPointer<void *>(context, arguments[0]));
1046     const char *type(CYPoolCString(pool, context, arguments[1]));
1047
1048     sig::Signature signature;
1049     sig::Parse(pool, &signature, type, &Structor_);
1050
1051     return CYMakePointer(context, value, _not(size_t), signature.elements[0].type, NULL, NULL);
1052 } CYCatch(NULL) }
1053
1054 static JSObjectRef Type_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1055     if (count != 1)
1056         throw CYJSError(context, "incorrect number of arguments to Type constructor");
1057     CYPool pool;
1058     const char *type(CYPoolCString(pool, context, arguments[0]));
1059     return CYMakeType(context, type);
1060 } CYCatch(NULL) }
1061
1062 static JSValueRef Type_callAsFunction_arrayOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1063     if (count != 1)
1064         throw CYJSError(context, "incorrect number of arguments to Type.arrayOf");
1065     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1066
1067     CYPool pool;
1068     size_t index(CYGetIndex(pool, context, CYJSString(context, arguments[0])));
1069     if (index == _not(size_t))
1070         throw CYJSError(context, "invalid array size used with Type.arrayOf");
1071
1072     sig::Type type;
1073     type.name = NULL;
1074     type.flags = 0;
1075
1076     type.primitive = sig::array_P;
1077     type.data.data.type = internal->type_;
1078     type.data.data.size = index;
1079
1080     return CYMakeType(context, &type);
1081 } CYCatch(NULL) }
1082
1083 static JSValueRef Type_callAsFunction_constant(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1084     if (count != 0)
1085         throw CYJSError(context, "incorrect number of arguments to Type.constant");
1086     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1087
1088     sig::Type type(*internal->type_);
1089     type.flags |= JOC_TYPE_CONST;
1090     return CYMakeType(context, &type);
1091 } CYCatch(NULL) }
1092
1093 static JSValueRef Type_callAsFunction_pointerTo(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1094     if (count != 0)
1095         throw CYJSError(context, "incorrect number of arguments to Type.pointerTo");
1096     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1097
1098     sig::Type type;
1099     type.name = NULL;
1100     type.flags = 0;
1101
1102     type.primitive = sig::pointer_P;
1103     type.data.data.type = internal->type_;
1104     type.data.data.size = 0;
1105
1106     return CYMakeType(context, &type);
1107 } CYCatch(NULL) }
1108
1109 static JSValueRef Type_callAsFunction_withName(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1110     if (count != 1)
1111         throw CYJSError(context, "incorrect number of arguments to Type.withName");
1112     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1113
1114     CYPool pool;
1115     const char *name(CYPoolCString(pool, context, arguments[0]));
1116
1117     sig::Type type(*internal->type_);
1118     type.name = name;
1119     return CYMakeType(context, &type);
1120 } CYCatch(NULL) }
1121
1122 static JSValueRef Type_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1123     if (count != 1)
1124         throw CYJSError(context, "incorrect number of arguments to type cast function");
1125     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1126
1127     sig::Type *type(internal->type_);
1128     ffi_type *ffi(internal->GetFFI());
1129     // XXX: alignment?
1130     uint8_t value[ffi->size];
1131     CYPool pool;
1132     CYPoolFFI(&pool, context, type, ffi, value, arguments[0]);
1133     return CYFromFFI(context, type, ffi, value);
1134 } CYCatch(NULL) }
1135
1136 static JSObjectRef Type_callAsConstructor(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1137     if (count != 0)
1138         throw CYJSError(context, "incorrect number of arguments to Type allocator");
1139     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1140
1141     sig::Type *type(internal->type_);
1142     size_t length;
1143
1144     if (type->primitive != sig::array_P)
1145         length = _not(size_t);
1146     else {
1147         length = type->data.data.size;
1148         type = type->data.data.type;
1149     }
1150
1151     void *value(malloc(internal->GetFFI()->size));
1152     return CYMakePointer(context, value, length, type, NULL, NULL);
1153 } CYCatch(NULL) }
1154
1155 static JSObjectRef Functor_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1156     if (count != 2)
1157         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1158     CYPool pool;
1159     const char *type(CYPoolCString(pool, context, arguments[1]));
1160     return CYMakeFunctor(context, arguments[0], type);
1161 } CYCatch(NULL) }
1162
1163 static JSValueRef CYValue_callAsFunction_valueOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1164     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1165     return CYCastJSValue(context, reinterpret_cast<uintptr_t>(internal->value_));
1166 } CYCatch(NULL) }
1167
1168 static JSValueRef CYValue_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1169     return CYValue_callAsFunction_valueOf(context, object, _this, count, arguments, exception);
1170 }
1171
1172 static JSValueRef CYValue_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1173     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1174     char string[32];
1175     sprintf(string, "%p", internal->value_);
1176     return CYCastJSValue(context, string);
1177 } CYCatch(NULL) }
1178
1179 static JSValueRef Pointer_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1180     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(_this)));
1181     if (internal->length_ != _not(size_t)) {
1182         JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array_prototype")));
1183         JSObjectRef toCYON(CYCastJSObject(context, CYGetProperty(context, Array, toCYON_s)));
1184         return CYCallAsFunction(context, toCYON, _this, count, arguments);
1185     } else {
1186         char string[32];
1187         sprintf(string, "%p", internal->value_);
1188         return CYCastJSValue(context, string);
1189     }
1190 } CYCatch(NULL) }
1191
1192 static JSValueRef Type_getProperty_alignment(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) {
1193     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1194     return CYCastJSValue(context, internal->GetFFI()->alignment);
1195 }
1196
1197 static JSValueRef Type_getProperty_name(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) {
1198     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1199     return CYCastJSValue(context, internal->type_->name);
1200 }
1201
1202 static JSValueRef Type_getProperty_size(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) {
1203     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1204     return CYCastJSValue(context, internal->GetFFI()->size);
1205 }
1206
1207 static JSValueRef Type_callAsFunction_toString(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1208     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1209     CYPool pool;
1210     const char *type(sig::Unparse(pool, internal->type_));
1211     return CYCastJSValue(context, CYJSString(type));
1212 } CYCatch(NULL) }
1213
1214 static JSValueRef Type_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1215     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1216     CYPool pool;
1217     const char *type(sig::Unparse(pool, internal->type_));
1218     std::ostringstream str;
1219     CYStringify(str, type, strlen(type));
1220     char *cyon(pool.strcat("new Type(", str.str().c_str(), ")", NULL));
1221     return CYCastJSValue(context, CYJSString(cyon));
1222 } CYCatch(NULL) }
1223
1224 static JSValueRef Type_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1225     return Type_callAsFunction_toString(context, object, _this, count, arguments, exception);
1226 }
1227
1228 static JSStaticFunction Pointer_staticFunctions[4] = {
1229     {"toCYON", &Pointer_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1230     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1231     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1232     {NULL, NULL, 0}
1233 };
1234
1235 static JSStaticFunction Struct_staticFunctions[2] = {
1236     {"$cya", &Struct_callAsFunction_$cya, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1237     {NULL, NULL, 0}
1238 };
1239
1240 static JSStaticFunction Functor_staticFunctions[4] = {
1241     {"toCYON", &CYValue_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1242     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1243     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1244     {NULL, NULL, 0}
1245 };
1246
1247 namespace cy {
1248     JSStaticFunction const * const Functor::StaticFunctions = Functor_staticFunctions;
1249 }
1250
1251 static JSStaticValue Type_staticValues[4] = {
1252     {"alignment", &Type_getProperty_alignment, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1253     {"name", &Type_getProperty_name, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1254     {"size", &Type_getProperty_size, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1255     {NULL, NULL, NULL, 0}
1256 };
1257
1258 static JSStaticFunction Type_staticFunctions[8] = {
1259     {"arrayOf", &Type_callAsFunction_arrayOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1260     {"constant", &Type_callAsFunction_constant, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1261     {"pointerTo", &Type_callAsFunction_pointerTo, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1262     {"withName", &Type_callAsFunction_withName, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1263     {"toCYON", &Type_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1264     {"toJSON", &Type_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1265     {"toString", &Type_callAsFunction_toString, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1266     {NULL, NULL, 0}
1267 };
1268
1269 static JSObjectRef (*JSObjectMakeArray$)(JSContextRef, size_t, const JSValueRef[], JSValueRef *);
1270
1271 void CYSetArgs(int argc, const char *argv[]) {
1272     JSContextRef context(CYGetJSContext());
1273     JSValueRef args[argc];
1274     for (int i(0); i != argc; ++i)
1275         args[i] = CYCastJSValue(context, argv[i]);
1276
1277     JSObjectRef array;
1278     if (JSObjectMakeArray$ != NULL) {
1279         JSValueRef exception(NULL);
1280         array = (*JSObjectMakeArray$)(context, argc, args, &exception);
1281         CYThrow(context, exception);
1282     } else {
1283         JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array")));
1284         JSValueRef value(CYCallAsFunction(context, Array, NULL, argc, args));
1285         array = CYCastJSObject(context, value);
1286     }
1287
1288     JSObjectRef System(CYGetCachedObject(context, CYJSString("System")));
1289     CYSetProperty(context, System, CYJSString("args"), array);
1290 }
1291
1292 JSObjectRef CYGetGlobalObject(JSContextRef context) {
1293     return JSContextGetGlobalObject(context);
1294 }
1295
1296 const char *CYExecute(CYPool &pool, CYUTF8String code) {
1297     JSContextRef context(CYGetJSContext());
1298     JSValueRef exception(NULL), result;
1299
1300     void *handle;
1301     if (hooks_ != NULL && hooks_->ExecuteStart != NULL)
1302         handle = (*hooks_->ExecuteStart)(context);
1303     else
1304         handle = NULL;
1305
1306     const char *json;
1307
1308     try {
1309         result = JSEvaluateScript(context, CYJSString(code), NULL, NULL, 0, &exception);
1310     } catch (const char *error) {
1311         return error;
1312     }
1313
1314     if (exception != NULL) error:
1315         return CYPoolCString(pool, context, CYJSString(context, exception));
1316
1317     if (JSValueIsUndefined(context, result))
1318         return NULL;
1319
1320     try {
1321         json = CYPoolCCYON(pool, context, result, &exception);
1322     } catch (const char *error) {
1323         return error;
1324     }
1325
1326     if (exception != NULL)
1327         goto error;
1328
1329     CYSetProperty(context, CYGetGlobalObject(context), Result_, result);
1330
1331     if (hooks_ != NULL && hooks_->ExecuteEnd != NULL)
1332         (*hooks_->ExecuteEnd)(context, handle);
1333     return json;
1334 }
1335
1336 extern "C" void CydgetSetupContext(JSGlobalContextRef context) {
1337     CYSetupContext(context);
1338 }
1339
1340 static bool initialized_ = false;
1341
1342 void CYInitializeDynamic() {
1343     if (!initialized_)
1344         initialized_ = true;
1345     else return;
1346
1347     JSObjectMakeArray$ = reinterpret_cast<JSObjectRef (*)(JSContextRef, size_t, const JSValueRef[], JSValueRef *)>(dlsym(RTLD_DEFAULT, "JSObjectMakeArray"));
1348
1349     JSClassDefinition definition;
1350
1351     definition = kJSClassDefinitionEmpty;
1352     definition.className = "All";
1353     definition.getProperty = &All_getProperty;
1354     definition.getPropertyNames = &All_getPropertyNames;
1355     All_ = JSClassCreate(&definition);
1356
1357     definition = kJSClassDefinitionEmpty;
1358     definition.className = "Context";
1359     definition.finalize = &CYFinalize;
1360     Context_ = JSClassCreate(&definition);
1361
1362     definition = kJSClassDefinitionEmpty;
1363     definition.className = "Functor";
1364     definition.staticFunctions = cy::Functor::StaticFunctions;
1365     definition.callAsFunction = &Functor_callAsFunction;
1366     definition.finalize = &CYFinalize;
1367     Functor_ = JSClassCreate(&definition);
1368
1369     definition = kJSClassDefinitionEmpty;
1370     definition.className = "Pointer";
1371     definition.staticFunctions = Pointer_staticFunctions;
1372     definition.getProperty = &Pointer_getProperty;
1373     definition.setProperty = &Pointer_setProperty;
1374     definition.finalize = &CYFinalize;
1375     Pointer_ = JSClassCreate(&definition);
1376
1377     definition = kJSClassDefinitionEmpty;
1378     definition.className = "Struct";
1379     definition.staticFunctions = Struct_staticFunctions;
1380     definition.getProperty = &Struct_getProperty;
1381     definition.setProperty = &Struct_setProperty;
1382     definition.getPropertyNames = &Struct_getPropertyNames;
1383     definition.finalize = &CYFinalize;
1384     Struct_ = JSClassCreate(&definition);
1385
1386     definition = kJSClassDefinitionEmpty;
1387     definition.className = "Type";
1388     definition.staticValues = Type_staticValues;
1389     definition.staticFunctions = Type_staticFunctions;
1390     definition.callAsFunction = &Type_callAsFunction;
1391     definition.callAsConstructor = &Type_callAsConstructor;
1392     definition.finalize = &CYFinalize;
1393     Type_privateData::Class_ = JSClassCreate(&definition);
1394
1395     definition = kJSClassDefinitionEmpty;
1396     definition.className = "Global";
1397     //definition.getProperty = &Global_getProperty;
1398     Global_ = JSClassCreate(&definition);
1399
1400     Array_s = JSStringCreateWithUTF8CString("Array");
1401     cy_s = JSStringCreateWithUTF8CString("$cy");
1402     length_s = JSStringCreateWithUTF8CString("length");
1403     message_s = JSStringCreateWithUTF8CString("message");
1404     name_s = JSStringCreateWithUTF8CString("name");
1405     pop_s = JSStringCreateWithUTF8CString("pop");
1406     prototype_s = JSStringCreateWithUTF8CString("prototype");
1407     push_s = JSStringCreateWithUTF8CString("push");
1408     splice_s = JSStringCreateWithUTF8CString("splice");
1409     toCYON_s = JSStringCreateWithUTF8CString("toCYON");
1410     toJSON_s = JSStringCreateWithUTF8CString("toJSON");
1411     toPointer_s = JSStringCreateWithUTF8CString("toPointer");
1412     toString_s = JSStringCreateWithUTF8CString("toString");
1413
1414     Result_ = JSStringCreateWithUTF8CString("_");
1415
1416     if (hooks_ != NULL && hooks_->Initialize != NULL)
1417         (*hooks_->Initialize)();
1418 }
1419
1420 void CYThrow(JSContextRef context, JSValueRef value) {
1421     if (value != NULL)
1422         throw CYJSError(context, value);
1423 }
1424
1425 const char *CYJSError::PoolCString(CYPool &pool) const {
1426     // XXX: this used to be CYPoolCString
1427     return CYPoolCCYON(pool, context_, value_);
1428 }
1429
1430 JSValueRef CYJSError::CastJSValue(JSContextRef context) const {
1431     // XXX: what if the context is different?
1432     return value_;
1433 }
1434
1435 JSValueRef CYCastJSError(JSContextRef context, const char *message) {
1436     JSObjectRef Error(CYGetCachedObject(context, CYJSString("Error")));
1437
1438     JSValueRef arguments[1] = {CYCastJSValue(context, message)};
1439
1440     JSValueRef exception(NULL);
1441     JSValueRef value(JSObjectCallAsConstructor(context, Error, 1, arguments, &exception));
1442     CYThrow(context, exception);
1443
1444     return value;
1445 }
1446
1447 JSValueRef CYPoolError::CastJSValue(JSContextRef context) const {
1448     return CYCastJSError(context, message_);
1449 }
1450
1451 CYJSError::CYJSError(JSContextRef context, const char *format, ...) {
1452     _assert(context != NULL);
1453
1454     CYPool pool;
1455
1456     va_list args;
1457     va_start(args, format);
1458     // XXX: there might be a beter way to think about this
1459     const char *message(pool.vsprintf(64, format, args));
1460     va_end(args);
1461
1462     value_ = CYCastJSError(context, message);
1463 }
1464
1465 JSGlobalContextRef CYGetJSContext(JSContextRef context) {
1466     return reinterpret_cast<Context *>(JSObjectGetPrivate(CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s))))->context_;
1467 }
1468
1469 extern "C" void CYSetupContext(JSGlobalContextRef context) {
1470     JSValueRef exception(NULL);
1471
1472     CYInitializeDynamic();
1473
1474     JSObjectRef global(CYGetGlobalObject(context));
1475
1476     JSObjectRef cy(JSObjectMake(context, Context_, new Context(context)));
1477     CYSetProperty(context, global, cy_s, cy, kJSPropertyAttributeDontEnum);
1478
1479 /* Cache Globals {{{ */
1480     JSObjectRef Array(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Array"))));
1481     CYSetProperty(context, cy, CYJSString("Array"), Array);
1482
1483     JSObjectRef Array_prototype(CYCastJSObject(context, CYGetProperty(context, Array, prototype_s)));
1484     CYSetProperty(context, cy, CYJSString("Array_prototype"), Array_prototype);
1485
1486     JSObjectRef Error(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Error"))));
1487     CYSetProperty(context, cy, CYJSString("Error"), Error);
1488
1489     JSObjectRef Function(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Function"))));
1490     CYSetProperty(context, cy, CYJSString("Function"), Function);
1491
1492     JSObjectRef Function_prototype(CYCastJSObject(context, CYGetProperty(context, Function, prototype_s)));
1493     CYSetProperty(context, cy, CYJSString("Function_prototype"), Function_prototype);
1494
1495     JSObjectRef Object(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Object"))));
1496     CYSetProperty(context, cy, CYJSString("Object"), Object);
1497
1498     JSObjectRef Object_prototype(CYCastJSObject(context, CYGetProperty(context, Object, prototype_s)));
1499     CYSetProperty(context, cy, CYJSString("Object_prototype"), Object_prototype);
1500
1501     JSObjectRef String(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("String"))));
1502     CYSetProperty(context, cy, CYJSString("String"), String);
1503
1504     JSObjectRef String_prototype(CYCastJSObject(context, CYGetProperty(context, String, prototype_s)));
1505     CYSetProperty(context, cy, CYJSString("String_prototype"), String_prototype);
1506 /* }}} */
1507
1508     CYSetProperty(context, Array_prototype, toCYON_s, &Array_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1509     CYSetProperty(context, String_prototype, toCYON_s, &String_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1510
1511     JSObjectRef cycript(JSObjectMake(context, NULL, NULL));
1512     CYSetProperty(context, global, CYJSString("Cycript"), cycript);
1513     CYSetProperty(context, cycript, CYJSString("gc"), &Cycript_gc_callAsFunction);
1514
1515     JSObjectRef Functor(JSObjectMakeConstructor(context, Functor_, &Functor_new));
1516     JSObjectSetPrototype(context, CYCastJSObject(context, CYGetProperty(context, Functor, prototype_s)), Function_prototype);
1517     CYSetProperty(context, cycript, CYJSString("Functor"), Functor);
1518
1519     CYSetProperty(context, cycript, CYJSString("Pointer"), JSObjectMakeConstructor(context, Pointer_, &Pointer_new));
1520     CYSetProperty(context, cycript, CYJSString("Type"), JSObjectMakeConstructor(context, Type_privateData::Class_, &Type_new));
1521
1522     JSObjectRef all(JSObjectMake(context, All_, NULL));
1523     CYSetProperty(context, cycript, CYJSString("all"), all);
1524
1525     JSObjectRef alls(JSObjectCallAsConstructor(context, Array, 0, NULL, &exception));
1526     CYThrow(context, exception);
1527     CYSetProperty(context, cycript, CYJSString("alls"), alls);
1528
1529     if (true) {
1530         JSObjectRef last(NULL), curr(global);
1531
1532         goto next; for (JSValueRef next;;) {
1533             if (JSValueIsNull(context, next))
1534                 break;
1535             last = curr;
1536             curr = CYCastJSObject(context, next);
1537           next:
1538             next = JSObjectGetPrototype(context, curr);
1539         }
1540
1541         JSObjectSetPrototype(context, last, all);
1542     }
1543
1544     CYSetProperty(context, global, CYJSString("$cyq"), &$cyq, kJSPropertyAttributeDontEnum);
1545
1546     JSObjectRef System(JSObjectMake(context, NULL, NULL));
1547     CYSetProperty(context, cy, CYJSString("System"), System);
1548
1549     CYSetProperty(context, global, CYJSString("system"), System);
1550     CYSetProperty(context, System, CYJSString("args"), CYJSNull(context));
1551     //CYSetProperty(context, System, CYJSString("global"), global);
1552     CYSetProperty(context, System, CYJSString("print"), &System_print);
1553
1554     if (CYBridgeEntry *entry = CYBridgeHash("1dlerror", 8))
1555         entry->cache_ = new cy::Functor(entry->value_, reinterpret_cast<void (*)()>(&dlerror));
1556
1557     if (hooks_ != NULL && hooks_->SetupContext != NULL)
1558         (*hooks_->SetupContext)(context);
1559
1560     CYArrayPush(context, alls, cycript);
1561 }
1562
1563 JSGlobalContextRef CYGetJSContext() {
1564     CYInitializeDynamic();
1565
1566     static JSGlobalContextRef context_;
1567
1568     if (context_ == NULL) {
1569         context_ = JSGlobalContextCreate(Global_);
1570         CYSetupContext(context_);
1571     }
1572
1573     return context_;
1574 }