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