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