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 size_t CYArrayLength(JSContextRef context, JSObjectRef array) {
 328     return CYCastDouble(context, CYGetProperty(context, array, length_s));
 329 }
 330
 331 JSValueRef CYArrayGet(JSContextRef context, JSObjectRef array, size_t index) {
 332     JSValueRef exception(NULL);
 333     JSValueRef value(JSObjectGetPropertyAtIndex(context, array, index, &exception));
 334     CYThrow(context, exception);
 335     return value;
 336 }
 337
 338 void CYArrayPush(JSContextRef context, JSObjectRef array, JSValueRef value) {
 339     JSValueRef exception(NULL);
 340     JSValueRef arguments[1];
 341     arguments[0] = value;
 342     JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array_prototype")));
 343     JSObjectCallAsFunction(context, CYCastJSObject(context, CYGetProperty(context, Array, push_s)), array, 1, arguments, &exception);
 344     CYThrow(context, exception);
 345 }
 346
 347 static JSValueRef System_print(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 348     if (count == 0)
 349         printf("\n");
 350     else {
 351         CYPool pool;
 352         printf("%s\n", CYPoolCString(pool, context, arguments[0]));
 353     }
 354
 355     return CYJSUndefined(context);
 356 } CYCatch(NULL) }
 357
 358 static size_t Nonce_(0);
 359
 360 static JSValueRef $cyq(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 361     CYPool pool;
 362     const char *name(pool.strcat(CYPoolCString(pool, context, arguments[0]), pool.itoa(Nonce_++), NULL));
 363     return CYCastJSValue(context, name);
 364 } CYCatch(NULL) }
 365
 366 static JSValueRef Cycript_gc_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 367     JSGarbageCollect(context);
 368     return CYJSUndefined(context);
 369 } CYCatch(NULL) }
 370
 371 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSValueRef value, JSValueRef *exception) { CYTry {
 372     switch (JSType type = JSValueGetType(context, value)) {
 373         case kJSTypeUndefined:
 374             return "undefined";
 375         case kJSTypeNull:
 376             return "null";
 377         case kJSTypeBoolean:
 378             return CYCastBool(context, value) ? "true" : "false";
 379
 380         case kJSTypeNumber: {
 381             std::ostringstream str;
 382             CYNumerify(str, CYCastDouble(context, value));
 383             std::string value(str.str());
 384             return pool.strmemdup(value.c_str(), value.size());
 385         } break;
 386
 387         case kJSTypeString: {
 388             std::ostringstream str;
 389             CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, value)));
 390             CYStringify(str, string.data, string.size);
 391             std::string value(str.str());
 392             return pool.strmemdup(value.c_str(), value.size());
 393         } break;
 394
 395         case kJSTypeObject:
 396             return CYPoolCCYON(pool, context, (JSObjectRef) value);
 397         default:
 398             throw CYJSError(context, "JSValueGetType() == 0x%x", type);
 399     }
 400 } CYCatch(NULL) }
 401
 402 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSValueRef value) {
 403     JSValueRef exception(NULL);
 404     const char *cyon(CYPoolCCYON(pool, context, value, &exception));
 405     CYThrow(context, exception);
 406     return cyon;
 407 }
 408
 409 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSObjectRef object) {
 410     JSValueRef toCYON(CYGetProperty(context, object, toCYON_s));
 411     if (CYIsCallable(context, toCYON)) {
 412         JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toCYON, object, 0, NULL));
 413         _assert(value != NULL);
 414         return CYPoolCString(pool, context, value);
 415     }
 416
 417     JSValueRef toJSON(CYGetProperty(context, object, toJSON_s));
 418     if (CYIsCallable(context, toJSON)) {
 419         JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 420         JSValueRef exception(NULL);
 421         const char *cyon(CYPoolCCYON(pool, context, CYCallAsFunction(context, (JSObjectRef) toJSON, object, 1, arguments), &exception));
 422         CYThrow(context, exception);
 423         return cyon;
 424     }
 425
 426     if (JSObjectIsFunction(context, object)) {
 427         JSValueRef toString(CYGetProperty(context, object, toString_s));
 428         if (CYIsCallable(context, toString)) {
 429             JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 430             JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toString, object, 1, arguments));
 431             _assert(value != NULL);
 432             return CYPoolCString(pool, context, value);
 433         }
 434     }
 435
 436     std::ostringstream str;
 437
 438     str << '{';
 439
 440     // XXX: this is, sadly, going to leak
 441     JSPropertyNameArrayRef names(JSObjectCopyPropertyNames(context, object));
 442
 443     bool comma(false);
 444
 445     for (size_t index(0), count(JSPropertyNameArrayGetCount(names)); index != count; ++index) {
 446         if (comma)
 447             str << ',';
 448         else
 449             comma = true;
 450
 451         JSStringRef name(JSPropertyNameArrayGetNameAtIndex(names, index));
 452         CYUTF8String string(CYPoolUTF8String(pool, context, name));
 453
 454         if (CYIsKey(string))
 455             str << string.data;
 456         else
 457             CYStringify(str, string.data, string.size);
 458
 459         str << ':';
 460
 461         try {
 462             JSValueRef value(CYGetProperty(context, object, name));
 463             str << CYPoolCCYON(pool, context, value);
 464         } catch (const CYException &error) {
 465             str << "@error";
 466         }
 467     }
 468
 469     JSPropertyNameArrayRelease(names);
 470
 471     str << '}';
 472
 473     std::string string(str.str());
 474     return pool.strmemdup(string.c_str(), string.size());
 475 }
 476
 477 static JSValueRef Array_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 478     CYPool pool;
 479     std::ostringstream str;
 480
 481     str << '[';
 482
 483     JSValueRef length(CYGetProperty(context, _this, length_s));
 484     bool comma(false);
 485
 486     for (size_t index(0), count(CYCastDouble(context, length)); index != count; ++index) {
 487         JSValueRef value(CYGetProperty(context, _this, index));
 488
 489         if (comma)
 490             str << ',';
 491         else
 492             comma = true;
 493
 494         if (!JSValueIsUndefined(context, value))
 495             str << CYPoolCCYON(pool, context, value);
 496         else {
 497             str << ',';
 498             comma = false;
 499         }
 500     }
 501
 502     str << ']';
 503
 504     std::string value(str.str());
 505     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 506 } CYCatch(NULL) }
 507
 508 static JSValueRef String_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 509     CYPool pool;
 510     std::ostringstream str;
 511
 512     CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, _this)));
 513     CYStringify(str, string.data, string.size);
 514
 515     std::string value(str.str());
 516     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 517 } CYCatch(NULL) }
 518
 519 JSObjectRef CYMakePointer(JSContextRef context, void *pointer, size_t length, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 520     Pointer *internal(new Pointer(pointer, context, owner, length, type));
 521     return JSObjectMake(context, Pointer_, internal);
 522 }
 523
 524 static JSObjectRef CYMakeFunctor(JSContextRef context, void (*function)(), const char *type) {
 525     return JSObjectMake(context, Functor_, new cy::Functor(type, function));
 526 }
 527
 528 static JSObjectRef CYMakeFunctor(JSContextRef context, const char *symbol, const char *type, void **cache) {
 529     cy::Functor *internal;
 530     if (*cache != NULL)
 531         internal = reinterpret_cast<cy::Functor *>(*cache);
 532     else {
 533         void (*function)()(reinterpret_cast<void (*)()>(CYCastSymbol(symbol)));
 534         if (function == NULL)
 535             return NULL;
 536
 537         internal = new cy::Functor(type, function);
 538         *cache = internal;
 539     }
 540
 541     ++internal->count_;
 542     return JSObjectMake(context, Functor_, internal);
 543 }
 544
 545 static bool CYGetOffset(CYPool &pool, JSContextRef context, JSStringRef value, ssize_t &index) {
 546     return CYGetOffset(CYPoolCString(pool, context, value), index);
 547 }
 548
 549 void *CYCastPointer_(JSContextRef context, JSValueRef value) {
 550     switch (JSValueGetType(context, value)) {
 551         case kJSTypeNull:
 552             return NULL;
 553         case kJSTypeObject: {
 554             JSObjectRef object((JSObjectRef) value);
 555             if (JSValueIsObjectOfClass(context, value, Pointer_)) {
 556                 Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 557                 return internal->value_;
 558             }
 559             JSValueRef toPointer(CYGetProperty(context, object, toPointer_s));
 560             if (CYIsCallable(context, toPointer)) {
 561                 JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toPointer, object, 0, NULL));
 562                 _assert(value != NULL);
 563                 return CYCastPointer_(context, value);
 564             }
 565         } default:
 566             double number(CYCastDouble(context, value));
 567             if (std::isnan(number))
 568                 throw CYJSError(context, "cannot convert value to pointer");
 569             return reinterpret_cast<void *>(static_cast<uintptr_t>(static_cast<long long>(number)));
 570     }
 571 }
 572
 573 void CYPoolFFI(CYPool *pool, JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, JSValueRef value) {
 574     switch (type->primitive) {
 575         case sig::boolean_P:
 576             *reinterpret_cast<bool *>(data) = JSValueToBoolean(context, value);
 577         break;
 578
 579 #define CYPoolFFI_(primitive, native) \
 580         case sig::primitive ## _P: \
 581             *reinterpret_cast<native *>(data) = CYCastDouble(context, value); \
 582         break;
 583
 584         CYPoolFFI_(uchar, unsigned char)
 585         CYPoolFFI_(char, char)
 586         CYPoolFFI_(ushort, unsigned short)
 587         CYPoolFFI_(short, short)
 588         CYPoolFFI_(ulong, unsigned long)
 589         CYPoolFFI_(long, long)
 590         CYPoolFFI_(uint, unsigned int)
 591         CYPoolFFI_(int, int)
 592         CYPoolFFI_(ulonglong, unsigned long long)
 593         CYPoolFFI_(longlong, long long)
 594         CYPoolFFI_(float, float)
 595         CYPoolFFI_(double, double)
 596
 597         case sig::array_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.data.size; ++index) {
 601                 ffi_type *field(ffi->elements[index]);
 602
 603                 JSValueRef rhs;
 604                 if (aggregate == NULL)
 605                     rhs = value;
 606                 else {
 607                     rhs = CYGetProperty(context, aggregate, index);
 608                     if (JSValueIsUndefined(context, rhs))
 609                         throw CYJSError(context, "unable to extract array value");
 610                 }
 611
 612                 CYPoolFFI(pool, context, type->data.data.type, field, base, rhs);
 613                 // XXX: alignment?
 614                 base += field->size;
 615             }
 616         } break;
 617
 618         case sig::pointer_P:
 619             *reinterpret_cast<void **>(data) = CYCastPointer<void *>(context, value);
 620         break;
 621
 622         case sig::string_P:
 623             _assert(pool != NULL);
 624             *reinterpret_cast<const char **>(data) = CYPoolCString(*pool, context, value);
 625         break;
 626
 627         case sig::struct_P: {
 628             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 629             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 630             for (size_t index(0); index != type->data.signature.count; ++index) {
 631                 sig::Element *element(&type->data.signature.elements[index]);
 632                 ffi_type *field(ffi->elements[index]);
 633
 634                 JSValueRef rhs;
 635                 if (aggregate == NULL)
 636                     rhs = value;
 637                 else {
 638                     rhs = CYGetProperty(context, aggregate, index);
 639                     if (JSValueIsUndefined(context, rhs)) {
 640                         if (element->name != NULL)
 641                             rhs = CYGetProperty(context, aggregate, CYJSString(element->name));
 642                         else
 643                             goto undefined;
 644                         if (JSValueIsUndefined(context, rhs)) undefined:
 645                             throw CYJSError(context, "unable to extract structure value");
 646                     }
 647                 }
 648
 649                 CYPoolFFI(pool, context, element->type, field, base, rhs);
 650                 // XXX: alignment?
 651                 base += field->size;
 652             }
 653         } break;
 654
 655         case sig::void_P:
 656         break;
 657
 658         default:
 659             if (hooks_ != NULL && hooks_->PoolFFI != NULL)
 660                 if ((*hooks_->PoolFFI)(pool, context, type, ffi, data, value))
 661                     return;
 662
 663             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 664     }
 665 }
 666
 667 JSValueRef CYFromFFI(JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, bool initialize, JSObjectRef owner) {
 668     switch (type->primitive) {
 669         case sig::boolean_P:
 670             return CYCastJSValue(context, *reinterpret_cast<bool *>(data));
 671
 672 #define CYFromFFI_(primitive, native) \
 673         case sig::primitive ## _P: \
 674             return CYCastJSValue(context, *reinterpret_cast<native *>(data)); \
 675
 676         CYFromFFI_(uchar, unsigned char)
 677         CYFromFFI_(char, char)
 678         CYFromFFI_(ushort, unsigned short)
 679         CYFromFFI_(short, short)
 680         CYFromFFI_(ulong, unsigned long)
 681         CYFromFFI_(long, long)
 682         CYFromFFI_(uint, unsigned int)
 683         CYFromFFI_(int, int)
 684         CYFromFFI_(ulonglong, unsigned long long)
 685         CYFromFFI_(longlong, long long)
 686         CYFromFFI_(float, float)
 687         CYFromFFI_(double, double)
 688
 689         case sig::array_P:
 690             if (void *pointer = data)
 691                 return CYMakePointer(context, pointer, type->data.data.size, type->data.data.type, NULL, owner);
 692             else goto null;
 693
 694         case sig::pointer_P:
 695             if (void *pointer = *reinterpret_cast<void **>(data))
 696                 return CYMakePointer(context, pointer, _not(size_t), type->data.data.type, NULL, owner);
 697             else goto null;
 698
 699         case sig::string_P:
 700             if (char *utf8 = *reinterpret_cast<char **>(data))
 701                 return CYCastJSValue(context, utf8);
 702             else goto null;
 703
 704         case sig::struct_P:
 705             return CYMakeStruct(context, data, type, ffi, owner);
 706         case sig::void_P:
 707             return CYJSUndefined(context);
 708
 709         null:
 710             return CYJSNull(context);
 711         default:
 712             if (hooks_ != NULL && hooks_->FromFFI != NULL)
 713                 if (JSValueRef value = (*hooks_->FromFFI)(context, type, ffi, data, initialize, owner))
 714                     return value;
 715
 716             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 717     }
 718 }
 719
 720 void CYExecuteClosure(ffi_cif *cif, void *result, void **arguments, void *arg, JSValueRef (*adapter)(JSContextRef, size_t, JSValueRef[], JSObjectRef)) {
 721     Closure_privateData *internal(reinterpret_cast<Closure_privateData *>(arg));
 722
 723     JSContextRef context(internal->context_);
 724
 725     size_t count(internal->cif_.nargs);
 726     JSValueRef values[count];
 727
 728     for (size_t index(0); index != count; ++index)
 729         values[index] = CYFromFFI(context, internal->signature_.elements[1 + index].type, internal->cif_.arg_types[index], arguments[index]);
 730
 731     JSValueRef value(adapter(context, count, values, internal->function_));
 732     CYPoolFFI(NULL, context, internal->signature_.elements[0].type, internal->cif_.rtype, result, value);
 733 }
 734
 735 static JSValueRef FunctionAdapter_(JSContextRef context, size_t count, JSValueRef values[], JSObjectRef function) {
 736     return CYCallAsFunction(context, function, NULL, count, values);
 737 }
 738
 739 static void FunctionClosure_(ffi_cif *cif, void *result, void **arguments, void *arg) {
 740     CYExecuteClosure(cif, result, arguments, arg, &FunctionAdapter_);
 741 }
 742
 743 Closure_privateData *CYMakeFunctor_(JSContextRef context, JSObjectRef function, const char *type, void (*callback)(ffi_cif *, void *, void **, void *)) {
 744     // XXX: in case of exceptions this will leak
 745     // XXX: in point of fact, this may /need/ to leak :(
 746     Closure_privateData *internal(new Closure_privateData(context, function, type));
 747
 748 #if defined(__APPLE__) && defined(__arm__)
 749     void *executable;
 750     ffi_closure *writable(reinterpret_cast<ffi_closure *>(ffi_closure_alloc(sizeof(ffi_closure), &executable)));
 751
 752     ffi_status status(ffi_prep_closure_loc(writable, &internal->cif_, callback, internal, executable));
 753     _assert(status == FFI_OK);
 754
 755     internal->value_ = executable;
 756 #else
 757     ffi_closure *closure((ffi_closure *) _syscall(mmap(
 758         NULL, sizeof(ffi_closure),
 759         PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE,
 760         -1, 0
 761     )));
 762
 763     ffi_status status(ffi_prep_closure(closure, &internal->cif_, callback, internal));
 764     _assert(status == FFI_OK);
 765
 766     _syscall(mprotect(closure, sizeof(*closure), PROT_READ | PROT_EXEC));
 767
 768     internal->value_ = closure;
 769 #endif
 770
 771     return internal;
 772 }
 773
 774 static JSObjectRef CYMakeFunctor(JSContextRef context, JSObjectRef function, const char *type) {
 775     Closure_privateData *internal(CYMakeFunctor_(context, function, type, &FunctionClosure_));
 776     JSObjectRef object(JSObjectMake(context, Functor_, internal));
 777     // XXX: see above notes about needing to leak
 778     JSValueProtect(CYGetJSContext(context), object);
 779     return object;
 780 }
 781
 782 JSObjectRef CYGetCachedObject(JSContextRef context, JSStringRef name) {
 783     return CYCastJSObject(context, CYGetProperty(context, CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s)), name));
 784 }
 785
 786 static JSObjectRef CYMakeFunctor(JSContextRef context, JSValueRef value, const char *type) {
 787     JSObjectRef Function(CYGetCachedObject(context, CYJSString("Function")));
 788
 789     JSValueRef exception(NULL);
 790     bool function(JSValueIsInstanceOfConstructor(context, value, Function, &exception));
 791     CYThrow(context, exception);
 792
 793     if (function) {
 794         JSObjectRef function(CYCastJSObject(context, value));
 795         return CYMakeFunctor(context, function, type);
 796     } else {
 797         void (*function)()(CYCastPointer<void (*)()>(context, value));
 798         return CYMakeFunctor(context, function, type);
 799     }
 800 }
 801
 802 static bool Index_(CYPool &pool, JSContextRef context, Struct_privateData *internal, JSStringRef property, ssize_t &index, uint8_t *&base) {
 803     Type_privateData *typical(internal->type_);
 804     sig::Type *type(typical->type_);
 805     if (type == NULL)
 806         return false;
 807
 808     const char *name(CYPoolCString(pool, context, property));
 809     size_t length(strlen(name));
 810     double number(CYCastDouble(name, length));
 811
 812     size_t count(type->data.signature.count);
 813
 814     if (std::isnan(number)) {
 815         if (property == NULL)
 816             return false;
 817
 818         sig::Element *elements(type->data.signature.elements);
 819
 820         for (size_t local(0); local != count; ++local) {
 821             sig::Element *element(&elements[local]);
 822             if (element->name != NULL && strcmp(name, element->name) == 0) {
 823                 index = local;
 824                 goto base;
 825             }
 826         }
 827
 828         return false;
 829     } else {
 830         index = static_cast<ssize_t>(number);
 831         if (index != number || index < 0 || static_cast<size_t>(index) >= count)
 832             return false;
 833     }
 834
 835   base:
 836     ffi_type **elements(typical->GetFFI()->elements);
 837
 838     base = reinterpret_cast<uint8_t *>(internal->value_);
 839     for (ssize_t local(0); local != index; ++local)
 840         base += elements[local]->size;
 841
 842     return true;
 843 }
 844
 845 static JSValueRef Pointer_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 846     CYPool pool;
 847     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 848
 849     if (JSStringIsEqual(property, length_s))
 850         return internal->length_ == _not(size_t) ? CYJSUndefined(context) : CYCastJSValue(context, internal->length_);
 851
 852     Type_privateData *typical(internal->type_);
 853
 854     if (typical->type_ == NULL)
 855         return NULL;
 856
 857     ssize_t offset;
 858     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 859         offset = 0;
 860     else if (!CYGetOffset(pool, context, property, offset))
 861         return NULL;
 862
 863     ffi_type *ffi(typical->GetFFI());
 864
 865     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 866     base += ffi->size * offset;
 867
 868     JSObjectRef owner(internal->GetOwner() ?: object);
 869     return CYFromFFI(context, typical->type_, ffi, base, false, owner);
 870 } CYCatch(NULL) }
 871
 872 static bool Pointer_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 873     CYPool pool;
 874     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 875     Type_privateData *typical(internal->type_);
 876
 877     if (typical->type_ == NULL)
 878         return false;
 879
 880     ssize_t offset;
 881     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 882         offset = 0;
 883     else if (!CYGetOffset(pool, context, property, offset))
 884         return false;
 885
 886     ffi_type *ffi(typical->GetFFI());
 887
 888     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 889     base += ffi->size * offset;
 890
 891     CYPoolFFI(NULL, context, typical->type_, ffi, base, value);
 892     return true;
 893 } CYCatch(false) }
 894
 895 static JSValueRef Struct_callAsFunction_$cya(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 896     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(_this)));
 897     Type_privateData *typical(internal->type_);
 898     return CYMakePointer(context, internal->value_, _not(size_t), typical->type_, typical->ffi_, _this);
 899 } CYCatch(NULL) }
 900
 901 static JSValueRef Struct_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 902     CYPool pool;
 903     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 904     Type_privateData *typical(internal->type_);
 905
 906     ssize_t index;
 907     uint8_t *base;
 908
 909     if (!Index_(pool, context, internal, property, index, base))
 910         return NULL;
 911
 912     JSObjectRef owner(internal->GetOwner() ?: object);
 913
 914     return CYFromFFI(context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, false, owner);
 915 } CYCatch(NULL) }
 916
 917 static bool Struct_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 918     CYPool pool;
 919     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 920     Type_privateData *typical(internal->type_);
 921
 922     ssize_t index;
 923     uint8_t *base;
 924
 925     if (!Index_(pool, context, internal, property, index, base))
 926         return false;
 927
 928     CYPoolFFI(NULL, context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, value);
 929     return true;
 930 } CYCatch(false) }
 931
 932 static void Struct_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
 933     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 934     Type_privateData *typical(internal->type_);
 935     sig::Type *type(typical->type_);
 936
 937     if (type == NULL)
 938         return;
 939
 940     size_t count(type->data.signature.count);
 941     sig::Element *elements(type->data.signature.elements);
 942
 943     char number[32];
 944
 945     for (size_t index(0); index != count; ++index) {
 946         const char *name;
 947         name = elements[index].name;
 948
 949         if (name == NULL) {
 950             sprintf(number, "%zu", index);
 951             name = number;
 952         }
 953
 954         JSPropertyNameAccumulatorAddName(names, CYJSString(name));
 955     }
 956 }
 957
 958 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)()) {
 959     if (setups + count != signature->count - 1)
 960         throw CYJSError(context, "incorrect number of arguments to ffi function");
 961
 962     size_t size(setups + count);
 963     void *values[size];
 964     memcpy(values, setup, sizeof(void *) * setups);
 965
 966     for (size_t index(setups); index != size; ++index) {
 967         sig::Element *element(&signature->elements[index + 1]);
 968         ffi_type *ffi(cif->arg_types[index]);
 969         // XXX: alignment?
 970         values[index] = new(pool) uint8_t[ffi->size];
 971         CYPoolFFI(&pool, context, element->type, ffi, values[index], arguments[index - setups]);
 972     }
 973
 974     uint8_t value[cif->rtype->size];
 975
 976     if (hooks_ != NULL && hooks_->CallFunction != NULL)
 977         (*hooks_->CallFunction)(context, cif, function, value, values);
 978     else
 979         ffi_call(cif, function, value, values);
 980
 981     return CYFromFFI(context, signature->elements[0].type, cif->rtype, value, initialize);
 982 }
 983
 984 static JSValueRef Functor_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 985     CYPool pool;
 986     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
 987     return CYCallFunction(pool, context, 0, NULL, count, arguments, false, &internal->signature_, &internal->cif_, internal->GetValue());
 988 } CYCatch(NULL) }
 989
 990 JSObjectRef CYMakeType(JSContextRef context, const char *type) {
 991     Type_privateData *internal(new Type_privateData(type));
 992     return JSObjectMake(context, Type_privateData::Class_, internal);
 993 }
 994
 995 JSObjectRef CYMakeType(JSContextRef context, sig::Type *type) {
 996     Type_privateData *internal(new Type_privateData(type));
 997     return JSObjectMake(context, Type_privateData::Class_, internal);
 998 }
 999
1000 static JSValueRef All_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1001     JSObjectRef global(CYGetGlobalObject(context));
1002     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
1003     JSObjectRef alls(CYCastJSObject(context, CYGetProperty(context, cycript, CYJSString("alls"))));
1004
1005     for (size_t i(0), count(CYArrayLength(context, alls)); i != count; ++i)
1006         if (JSObjectRef space = CYCastJSObject(context, CYArrayGet(context, alls, count - i - 1)))
1007             if (JSValueRef value = CYGetProperty(context, space, property))
1008                 if (!JSValueIsUndefined(context, value))
1009                     return value;
1010
1011     CYPool pool;
1012     CYUTF8String name(CYPoolUTF8String(pool, context, property));
1013
1014     size_t length(name.size);
1015     char keyed[length + 2];
1016     memcpy(keyed + 1, name.data, length + 1);
1017
1018     static const char *modes = "0124";
1019     for (size_t i(0); i != 4; ++i) {
1020         char mode(modes[i]);
1021         keyed[0] = mode;
1022
1023         if (CYBridgeEntry *entry = CYBridgeHash(keyed, length + 1))
1024             switch (mode) {
1025                 case '0':
1026                     return JSEvaluateScript(CYGetJSContext(context), CYJSString(entry->value_), NULL, NULL, 0, NULL);
1027
1028                 case '1':
1029                     return CYMakeFunctor(context, name.data, entry->value_, &entry->cache_);
1030
1031                 case '2':
1032                     if (void *symbol = CYCastSymbol(name.data)) {
1033                         // XXX: this is horrendously inefficient
1034                         sig::Signature signature;
1035                         sig::Parse(pool, &signature, entry->value_, &Structor_);
1036                         ffi_cif cif;
1037                         sig::sig_ffi_cif(pool, &sig::ObjectiveC, &signature, &cif);
1038                         return CYFromFFI(context, signature.elements[0].type, cif.rtype, symbol);
1039                     } else return NULL;
1040
1041                 // XXX: implement case 3
1042                 case '4':
1043                     return CYMakeType(context, entry->value_);
1044             }
1045     }
1046
1047     return NULL;
1048 } CYCatch(NULL) }
1049
1050 static void All_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
1051     JSObjectRef global(CYGetGlobalObject(context));
1052     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
1053     JSObjectRef alls(CYCastJSObject(context, CYGetProperty(context, cycript, CYJSString("alls"))));
1054
1055     for (size_t i(0), count(CYArrayLength(context, alls)); i != count; ++i)
1056         if (JSObjectRef space = CYCastJSObject(context, CYArrayGet(context, alls, count - i - 1))) {
1057             JSPropertyNameArrayRef subset(JSObjectCopyPropertyNames(context, space));
1058             for (size_t index(0), count(JSPropertyNameArrayGetCount(subset)); index != count; ++index)
1059                 JSPropertyNameAccumulatorAddName(names, JSPropertyNameArrayGetNameAtIndex(subset, index));
1060             JSPropertyNameArrayRelease(subset);
1061         }
1062 }
1063
1064 static JSObjectRef Pointer_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1065     if (count != 2)
1066         throw CYJSError(context, "incorrect number of arguments to Pointer constructor");
1067
1068     CYPool pool;
1069
1070     void *value(CYCastPointer<void *>(context, arguments[0]));
1071     const char *type(CYPoolCString(pool, context, arguments[1]));
1072
1073     sig::Signature signature;
1074     sig::Parse(pool, &signature, type, &Structor_);
1075
1076     return CYMakePointer(context, value, _not(size_t), signature.elements[0].type, NULL, NULL);
1077 } CYCatch(NULL) }
1078
1079 static JSObjectRef Type_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1080     if (count != 1)
1081         throw CYJSError(context, "incorrect number of arguments to Type constructor");
1082     CYPool pool;
1083     const char *type(CYPoolCString(pool, context, arguments[0]));
1084     return CYMakeType(context, type);
1085 } CYCatch(NULL) }
1086
1087 static JSValueRef Type_callAsFunction_arrayOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1088     if (count != 1)
1089         throw CYJSError(context, "incorrect number of arguments to Type.arrayOf");
1090     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1091
1092     CYPool pool;
1093     size_t index(CYGetIndex(pool, context, CYJSString(context, arguments[0])));
1094     if (index == _not(size_t))
1095         throw CYJSError(context, "invalid array size used with Type.arrayOf");
1096
1097     sig::Type type;
1098     type.name = NULL;
1099     type.flags = 0;
1100
1101     type.primitive = sig::array_P;
1102     type.data.data.type = internal->type_;
1103     type.data.data.size = index;
1104
1105     return CYMakeType(context, &type);
1106 } CYCatch(NULL) }
1107
1108 static JSValueRef Type_callAsFunction_constant(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1109     if (count != 0)
1110         throw CYJSError(context, "incorrect number of arguments to Type.constant");
1111     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1112
1113     sig::Type type(*internal->type_);
1114     type.flags |= JOC_TYPE_CONST;
1115     return CYMakeType(context, &type);
1116 } CYCatch(NULL) }
1117
1118 static JSValueRef Type_callAsFunction_pointerTo(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1119     if (count != 0)
1120         throw CYJSError(context, "incorrect number of arguments to Type.pointerTo");
1121     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1122
1123     sig::Type type;
1124     type.name = NULL;
1125     type.flags = 0;
1126
1127     type.primitive = sig::pointer_P;
1128     type.data.data.type = internal->type_;
1129     type.data.data.size = 0;
1130
1131     return CYMakeType(context, &type);
1132 } CYCatch(NULL) }
1133
1134 static JSValueRef Type_callAsFunction_withName(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1135     if (count != 1)
1136         throw CYJSError(context, "incorrect number of arguments to Type.withName");
1137     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1138
1139     CYPool pool;
1140     const char *name(CYPoolCString(pool, context, arguments[0]));
1141
1142     sig::Type type(*internal->type_);
1143     type.name = name;
1144     return CYMakeType(context, &type);
1145 } CYCatch(NULL) }
1146
1147 static JSValueRef Type_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1148     if (count != 1)
1149         throw CYJSError(context, "incorrect number of arguments to type cast function");
1150     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1151
1152     sig::Type *type(internal->type_);
1153     ffi_type *ffi(internal->GetFFI());
1154     // XXX: alignment?
1155     uint8_t value[ffi->size];
1156     CYPool pool;
1157     CYPoolFFI(&pool, context, type, ffi, value, arguments[0]);
1158     return CYFromFFI(context, type, ffi, value);
1159 } CYCatch(NULL) }
1160
1161 static JSObjectRef Type_callAsConstructor(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1162     if (count != 0)
1163         throw CYJSError(context, "incorrect number of arguments to Type allocator");
1164     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1165
1166     sig::Type *type(internal->type_);
1167     size_t length;
1168
1169     if (type->primitive != sig::array_P)
1170         length = _not(size_t);
1171     else {
1172         length = type->data.data.size;
1173         type = type->data.data.type;
1174     }
1175
1176     void *value(malloc(internal->GetFFI()->size));
1177     return CYMakePointer(context, value, length, type, NULL, NULL);
1178 } CYCatch(NULL) }
1179
1180 static JSObjectRef Functor_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1181     if (count != 2)
1182         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1183     CYPool pool;
1184     const char *type(CYPoolCString(pool, context, arguments[1]));
1185     return CYMakeFunctor(context, arguments[0], type);
1186 } CYCatch(NULL) }
1187
1188 static JSValueRef CYValue_callAsFunction_valueOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1189     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1190     return CYCastJSValue(context, reinterpret_cast<uintptr_t>(internal->value_));
1191 } CYCatch(NULL) }
1192
1193 static JSValueRef CYValue_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1194     return CYValue_callAsFunction_valueOf(context, object, _this, count, arguments, exception);
1195 }
1196
1197 static JSValueRef CYValue_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1198     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1199     char string[32];
1200     sprintf(string, "%p", internal->value_);
1201     return CYCastJSValue(context, string);
1202 } CYCatch(NULL) }
1203
1204 static JSValueRef Pointer_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1205     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(_this)));
1206     if (internal->length_ != _not(size_t)) {
1207         JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array_prototype")));
1208         JSObjectRef toCYON(CYCastJSObject(context, CYGetProperty(context, Array, toCYON_s)));
1209         return CYCallAsFunction(context, toCYON, _this, count, arguments);
1210     } else {
1211         char string[32];
1212         sprintf(string, "%p", internal->value_);
1213         return CYCastJSValue(context, string);
1214     }
1215 } CYCatch(NULL) }
1216
1217 static JSValueRef Functor_getProperty_type(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1218     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
1219     CYPool pool;
1220     return CYCastJSValue(context, Unparse(pool, &internal->signature_));
1221 } CYCatch(NULL) }
1222
1223 static JSValueRef Type_getProperty_alignment(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1224     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1225     return CYCastJSValue(context, internal->GetFFI()->alignment);
1226 } CYCatch(NULL) }
1227
1228 static JSValueRef Type_getProperty_name(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1229     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1230     return CYCastJSValue(context, internal->type_->name);
1231 } CYCatch(NULL) }
1232
1233 static JSValueRef Type_getProperty_size(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1234     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1235     return CYCastJSValue(context, internal->GetFFI()->size);
1236 } CYCatch(NULL) }
1237
1238 static JSValueRef Type_callAsFunction_toString(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1239     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1240     CYPool pool;
1241     const char *type(sig::Unparse(pool, internal->type_));
1242     return CYCastJSValue(context, CYJSString(type));
1243 } CYCatch(NULL) }
1244
1245 static JSValueRef Type_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1246     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1247     CYPool pool;
1248     const char *type(sig::Unparse(pool, internal->type_));
1249     std::ostringstream str;
1250     CYStringify(str, type, strlen(type));
1251     char *cyon(pool.strcat("new Type(", str.str().c_str(), ")", NULL));
1252     return CYCastJSValue(context, CYJSString(cyon));
1253 } CYCatch(NULL) }
1254
1255 static JSValueRef Type_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1256     return Type_callAsFunction_toString(context, object, _this, count, arguments, exception);
1257 }
1258
1259 static JSStaticFunction Pointer_staticFunctions[4] = {
1260     {"toCYON", &Pointer_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1261     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1262     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1263     {NULL, NULL, 0}
1264 };
1265
1266 static JSStaticFunction Struct_staticFunctions[2] = {
1267     {"$cya", &Struct_callAsFunction_$cya, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1268     {NULL, NULL, 0}
1269 };
1270
1271 static JSStaticFunction Functor_staticFunctions[4] = {
1272     {"toCYON", &CYValue_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1273     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1274     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1275     {NULL, NULL, 0}
1276 };
1277
1278 namespace cy {
1279     JSStaticFunction const * const Functor::StaticFunctions = Functor_staticFunctions;
1280 }
1281
1282 static JSStaticValue Functor_staticValues[2] = {
1283     {"type", &Functor_getProperty_type, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1284     {NULL, NULL, NULL, 0}
1285 };
1286
1287 static JSStaticValue Type_staticValues[4] = {
1288     {"alignment", &Type_getProperty_alignment, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1289     {"name", &Type_getProperty_name, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1290     {"size", &Type_getProperty_size, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1291     {NULL, NULL, NULL, 0}
1292 };
1293
1294 static JSStaticFunction Type_staticFunctions[8] = {
1295     {"arrayOf", &Type_callAsFunction_arrayOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1296     {"constant", &Type_callAsFunction_constant, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1297     {"pointerTo", &Type_callAsFunction_pointerTo, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1298     {"withName", &Type_callAsFunction_withName, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1299     {"toCYON", &Type_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1300     {"toJSON", &Type_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1301     {"toString", &Type_callAsFunction_toString, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1302     {NULL, NULL, 0}
1303 };
1304
1305 static JSObjectRef (*JSObjectMakeArray$)(JSContextRef, size_t, const JSValueRef[], JSValueRef *);
1306
1307 void CYSetArgs(int argc, const char *argv[]) {
1308     JSContextRef context(CYGetJSContext());
1309     JSValueRef args[argc];
1310     for (int i(0); i != argc; ++i)
1311         args[i] = CYCastJSValue(context, argv[i]);
1312
1313     JSObjectRef array;
1314     if (JSObjectMakeArray$ != NULL) {
1315         JSValueRef exception(NULL);
1316         array = (*JSObjectMakeArray$)(context, argc, args, &exception);
1317         CYThrow(context, exception);
1318     } else {
1319         JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array")));
1320         JSValueRef value(CYCallAsFunction(context, Array, NULL, argc, args));
1321         array = CYCastJSObject(context, value);
1322     }
1323
1324     JSObjectRef System(CYGetCachedObject(context, CYJSString("System")));
1325     CYSetProperty(context, System, CYJSString("args"), array);
1326 }
1327
1328 JSObjectRef CYGetGlobalObject(JSContextRef context) {
1329     return JSContextGetGlobalObject(context);
1330 }
1331
1332 const char *CYExecute(CYPool &pool, CYUTF8String code) {
1333     JSContextRef context(CYGetJSContext());
1334     JSValueRef exception(NULL), result;
1335
1336     void *handle;
1337     if (hooks_ != NULL && hooks_->ExecuteStart != NULL)
1338         handle = (*hooks_->ExecuteStart)(context);
1339     else
1340         handle = NULL;
1341
1342     const char *json;
1343
1344     try {
1345         result = JSEvaluateScript(context, CYJSString(code), NULL, NULL, 0, &exception);
1346     } catch (const char *error) {
1347         return error;
1348     }
1349
1350     if (exception != NULL) error:
1351         return CYPoolCString(pool, context, CYJSString(context, exception));
1352
1353     if (JSValueIsUndefined(context, result))
1354         return NULL;
1355
1356     try {
1357         json = CYPoolCCYON(pool, context, result, &exception);
1358     } catch (const char *error) {
1359         return error;
1360     }
1361
1362     if (exception != NULL)
1363         goto error;
1364
1365     CYSetProperty(context, CYGetGlobalObject(context), Result_, result);
1366
1367     if (hooks_ != NULL && hooks_->ExecuteEnd != NULL)
1368         (*hooks_->ExecuteEnd)(context, handle);
1369     return json;
1370 }
1371
1372 extern "C" void CydgetSetupContext(JSGlobalContextRef context) {
1373     CYSetupContext(context);
1374 }
1375
1376 static bool initialized_ = false;
1377
1378 void CYInitializeDynamic() {
1379     if (!initialized_)
1380         initialized_ = true;
1381     else return;
1382
1383     JSObjectMakeArray$ = reinterpret_cast<JSObjectRef (*)(JSContextRef, size_t, const JSValueRef[], JSValueRef *)>(dlsym(RTLD_DEFAULT, "JSObjectMakeArray"));
1384
1385     JSClassDefinition definition;
1386
1387     definition = kJSClassDefinitionEmpty;
1388     definition.className = "All";
1389     definition.getProperty = &All_getProperty;
1390     definition.getPropertyNames = &All_getPropertyNames;
1391     All_ = JSClassCreate(&definition);
1392
1393     definition = kJSClassDefinitionEmpty;
1394     definition.className = "Context";
1395     definition.finalize = &CYFinalize;
1396     Context_ = JSClassCreate(&definition);
1397
1398     definition = kJSClassDefinitionEmpty;
1399     definition.className = "Functor";
1400     definition.staticFunctions = cy::Functor::StaticFunctions;
1401     definition.staticValues = Functor_staticValues;
1402     definition.callAsFunction = &Functor_callAsFunction;
1403     definition.finalize = &CYFinalize;
1404     Functor_ = JSClassCreate(&definition);
1405
1406     definition = kJSClassDefinitionEmpty;
1407     definition.className = "Pointer";
1408     definition.staticFunctions = Pointer_staticFunctions;
1409     definition.getProperty = &Pointer_getProperty;
1410     definition.setProperty = &Pointer_setProperty;
1411     definition.finalize = &CYFinalize;
1412     Pointer_ = JSClassCreate(&definition);
1413
1414     definition = kJSClassDefinitionEmpty;
1415     definition.className = "Struct";
1416     definition.staticFunctions = Struct_staticFunctions;
1417     definition.getProperty = &Struct_getProperty;
1418     definition.setProperty = &Struct_setProperty;
1419     definition.getPropertyNames = &Struct_getPropertyNames;
1420     definition.finalize = &CYFinalize;
1421     Struct_ = JSClassCreate(&definition);
1422
1423     definition = kJSClassDefinitionEmpty;
1424     definition.className = "Type";
1425     definition.staticValues = Type_staticValues;
1426     definition.staticFunctions = Type_staticFunctions;
1427     definition.callAsFunction = &Type_callAsFunction;
1428     definition.callAsConstructor = &Type_callAsConstructor;
1429     definition.finalize = &CYFinalize;
1430     Type_privateData::Class_ = JSClassCreate(&definition);
1431
1432     definition = kJSClassDefinitionEmpty;
1433     definition.className = "Global";
1434     //definition.getProperty = &Global_getProperty;
1435     Global_ = JSClassCreate(&definition);
1436
1437     Array_s = JSStringCreateWithUTF8CString("Array");
1438     cy_s = JSStringCreateWithUTF8CString("$cy");
1439     length_s = JSStringCreateWithUTF8CString("length");
1440     message_s = JSStringCreateWithUTF8CString("message");
1441     name_s = JSStringCreateWithUTF8CString("name");
1442     pop_s = JSStringCreateWithUTF8CString("pop");
1443     prototype_s = JSStringCreateWithUTF8CString("prototype");
1444     push_s = JSStringCreateWithUTF8CString("push");
1445     splice_s = JSStringCreateWithUTF8CString("splice");
1446     toCYON_s = JSStringCreateWithUTF8CString("toCYON");
1447     toJSON_s = JSStringCreateWithUTF8CString("toJSON");
1448     toPointer_s = JSStringCreateWithUTF8CString("toPointer");
1449     toString_s = JSStringCreateWithUTF8CString("toString");
1450
1451     Result_ = JSStringCreateWithUTF8CString("_");
1452
1453     if (hooks_ != NULL && hooks_->Initialize != NULL)
1454         (*hooks_->Initialize)();
1455 }
1456
1457 void CYThrow(JSContextRef context, JSValueRef value) {
1458     if (value != NULL)
1459         throw CYJSError(context, value);
1460 }
1461
1462 const char *CYJSError::PoolCString(CYPool &pool) const {
1463     // XXX: this used to be CYPoolCString
1464     return CYPoolCCYON(pool, context_, value_);
1465 }
1466
1467 JSValueRef CYJSError::CastJSValue(JSContextRef context) const {
1468     // XXX: what if the context is different?
1469     return value_;
1470 }
1471
1472 JSValueRef CYCastJSError(JSContextRef context, const char *message) {
1473     JSObjectRef Error(CYGetCachedObject(context, CYJSString("Error")));
1474
1475     JSValueRef arguments[1] = {CYCastJSValue(context, message)};
1476
1477     JSValueRef exception(NULL);
1478     JSValueRef value(JSObjectCallAsConstructor(context, Error, 1, arguments, &exception));
1479     CYThrow(context, exception);
1480
1481     return value;
1482 }
1483
1484 JSValueRef CYPoolError::CastJSValue(JSContextRef context) const {
1485     return CYCastJSError(context, message_);
1486 }
1487
1488 CYJSError::CYJSError(JSContextRef context, const char *format, ...) {
1489     _assert(context != NULL);
1490
1491     CYPool pool;
1492
1493     va_list args;
1494     va_start(args, format);
1495     // XXX: there might be a beter way to think about this
1496     const char *message(pool.vsprintf(64, format, args));
1497     va_end(args);
1498
1499     value_ = CYCastJSError(context, message);
1500 }
1501
1502 JSGlobalContextRef CYGetJSContext(JSContextRef context) {
1503     return reinterpret_cast<Context *>(JSObjectGetPrivate(CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s))))->context_;
1504 }
1505
1506 extern "C" void CYSetupContext(JSGlobalContextRef context) {
1507     JSValueRef exception(NULL);
1508
1509     CYInitializeDynamic();
1510
1511     JSObjectRef global(CYGetGlobalObject(context));
1512
1513     JSObjectRef cy(JSObjectMake(context, Context_, new Context(context)));
1514     CYSetProperty(context, global, cy_s, cy, kJSPropertyAttributeDontEnum);
1515
1516 /* Cache Globals {{{ */
1517     JSObjectRef Array(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Array"))));
1518     CYSetProperty(context, cy, CYJSString("Array"), Array);
1519
1520     JSObjectRef Array_prototype(CYCastJSObject(context, CYGetProperty(context, Array, prototype_s)));
1521     CYSetProperty(context, cy, CYJSString("Array_prototype"), Array_prototype);
1522
1523     JSObjectRef Error(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Error"))));
1524     CYSetProperty(context, cy, CYJSString("Error"), Error);
1525
1526     JSObjectRef Function(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Function"))));
1527     CYSetProperty(context, cy, CYJSString("Function"), Function);
1528
1529     JSObjectRef Function_prototype(CYCastJSObject(context, CYGetProperty(context, Function, prototype_s)));
1530     CYSetProperty(context, cy, CYJSString("Function_prototype"), Function_prototype);
1531
1532     JSObjectRef Object(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Object"))));
1533     CYSetProperty(context, cy, CYJSString("Object"), Object);
1534
1535     JSObjectRef Object_prototype(CYCastJSObject(context, CYGetProperty(context, Object, prototype_s)));
1536     CYSetProperty(context, cy, CYJSString("Object_prototype"), Object_prototype);
1537
1538     JSObjectRef String(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("String"))));
1539     CYSetProperty(context, cy, CYJSString("String"), String);
1540
1541     JSObjectRef String_prototype(CYCastJSObject(context, CYGetProperty(context, String, prototype_s)));
1542     CYSetProperty(context, cy, CYJSString("String_prototype"), String_prototype);
1543 /* }}} */
1544
1545     CYSetProperty(context, Array_prototype, toCYON_s, &Array_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1546     CYSetProperty(context, String_prototype, toCYON_s, &String_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1547
1548     JSObjectRef cycript(JSObjectMake(context, NULL, NULL));
1549     CYSetProperty(context, global, CYJSString("Cycript"), cycript);
1550     CYSetProperty(context, cycript, CYJSString("gc"), &Cycript_gc_callAsFunction);
1551
1552     JSObjectRef Functor(JSObjectMakeConstructor(context, Functor_, &Functor_new));
1553     JSObjectSetPrototype(context, CYCastJSObject(context, CYGetProperty(context, Functor, prototype_s)), Function_prototype);
1554     CYSetProperty(context, cycript, CYJSString("Functor"), Functor);
1555
1556     CYSetProperty(context, cycript, CYJSString("Pointer"), JSObjectMakeConstructor(context, Pointer_, &Pointer_new));
1557     CYSetProperty(context, cycript, CYJSString("Type"), JSObjectMakeConstructor(context, Type_privateData::Class_, &Type_new));
1558
1559     JSObjectRef all(JSObjectMake(context, All_, NULL));
1560     CYSetProperty(context, cycript, CYJSString("all"), all);
1561
1562     JSObjectRef alls(JSObjectCallAsConstructor(context, Array, 0, NULL, &exception));
1563     CYThrow(context, exception);
1564     CYSetProperty(context, cycript, CYJSString("alls"), alls);
1565
1566     if (true) {
1567         JSObjectRef last(NULL), curr(global);
1568
1569         goto next; for (JSValueRef next;;) {
1570             if (JSValueIsNull(context, next))
1571                 break;
1572             last = curr;
1573             curr = CYCastJSObject(context, next);
1574           next:
1575             next = JSObjectGetPrototype(context, curr);
1576         }
1577
1578         JSObjectSetPrototype(context, last, all);
1579     }
1580
1581     CYSetProperty(context, global, CYJSString("$cyq"), &$cyq, kJSPropertyAttributeDontEnum);
1582
1583     JSObjectRef System(JSObjectMake(context, NULL, NULL));
1584     CYSetProperty(context, cy, CYJSString("System"), System);
1585
1586     CYSetProperty(context, global, CYJSString("system"), System);
1587     CYSetProperty(context, System, CYJSString("args"), CYJSNull(context));
1588     //CYSetProperty(context, System, CYJSString("global"), global);
1589     CYSetProperty(context, System, CYJSString("print"), &System_print);
1590
1591     if (CYBridgeEntry *entry = CYBridgeHash("1dlerror", 8))
1592         entry->cache_ = new cy::Functor(entry->value_, reinterpret_cast<void (*)()>(&dlerror));
1593
1594     if (hooks_ != NULL && hooks_->SetupContext != NULL)
1595         (*hooks_->SetupContext)(context);
1596
1597     CYArrayPush(context, alls, cycript);
1598 }
1599
1600 JSGlobalContextRef CYGetJSContext() {
1601     CYInitializeDynamic();
1602
1603     static JSGlobalContextRef context_;
1604
1605     if (context_ == NULL) {
1606         context_ = JSGlobalContextCreate(Global_);
1607         CYSetupContext(context_);
1608     }
1609
1610     return context_;
1611 }