Execute.cpp

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2014  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU Affero General Public License, Version 3 {{{ */
   6 /*
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 #include "Internal.hpp"
  23
  24 #include <dlfcn.h>
  25 #include <dirent.h>
  26 #include <fcntl.h>
  27 #include <unistd.h>
  28
  29 #include "cycript.hpp"
  30
  31 #include "sig/parse.hpp"
  32 #include "sig/ffi_type.hpp"
  33
  34 #include "Pooling.hpp"
  35 #include "Execute.hpp"
  36
  37 #include <sys/mman.h>
  38 #include <sys/stat.h>
  39
  40 #include <iostream>
  41 #include <set>
  42 #include <map>
  43 #include <iomanip>
  44 #include <sstream>
  45 #include <cmath>
  46
  47 #include "Code.hpp"
  48 #include "Decode.hpp"
  49 #include "Error.hpp"
  50 #include "JavaScript.hpp"
  51 #include "String.hpp"
  52
  53 static std::vector<CYHook *> &GetHooks() {
  54     static std::vector<CYHook *> hooks;
  55     return hooks;
  56 }
  57
  58 CYRegisterHook::CYRegisterHook(CYHook *hook) {
  59     GetHooks().push_back(hook);
  60 }
  61
  62 /* JavaScript Properties {{{ */
  63 bool CYHasProperty(JSContextRef context, JSObjectRef object, JSStringRef name) {
  64     return JSObjectHasProperty(context, object, name);
  65 }
  66
  67 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, size_t index) {
  68     return _jsccall(JSObjectGetPropertyAtIndex, context, object, index);
  69 }
  70
  71 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, JSStringRef name) {
  72     return _jsccall(JSObjectGetProperty, context, object, name);
  73 }
  74
  75 void CYSetProperty(JSContextRef context, JSObjectRef object, size_t index, JSValueRef value) {
  76     _jsccall(JSObjectSetPropertyAtIndex, context, object, index, value);
  77 }
  78
  79 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef value, JSPropertyAttributes attributes) {
  80     _jsccall(JSObjectSetProperty, context, object, name, value, attributes);
  81 }
  82
  83 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef (*callback)(JSContextRef, JSObjectRef, JSObjectRef, size_t, const JSValueRef[], JSValueRef *), JSPropertyAttributes attributes) {
  84     CYSetProperty(context, object, name, JSObjectMakeFunctionWithCallback(context, name, callback), attributes);
  85 }
  86
  87 void CYSetPrototype(JSContextRef context, JSObjectRef object, JSValueRef value) {
  88     JSObjectSetPrototype(context, object, value);
  89     _assert(CYIsStrictEqual(context, JSObjectGetPrototype(context, object), value));
  90 }
  91 /* }}} */
  92 /* JavaScript Strings {{{ */
  93 JSStringRef CYCopyJSString(const char *value) {
  94     return value == NULL ? NULL : JSStringCreateWithUTF8CString(value);
  95 }
  96
  97 JSStringRef CYCopyJSString(JSStringRef value) {
  98     return value == NULL ? NULL : JSStringRetain(value);
  99 }
 100
 101 JSStringRef CYCopyJSString(CYUTF8String value) {
 102     // XXX: this is very wrong; it needs to convert to UTF16 and then create from there
 103     return CYCopyJSString(value.data);
 104 }
 105
 106 JSStringRef CYCopyJSString(JSContextRef context, JSValueRef value) {
 107     if (JSValueIsNull(context, value))
 108         return NULL;
 109     return _jsccall(JSValueToStringCopy, context, value);
 110 }
 111
 112 static CYUTF16String CYCastUTF16String(JSStringRef value) {
 113     return CYUTF16String(JSStringGetCharactersPtr(value), JSStringGetLength(value));
 114 }
 115
 116 CYUTF8String CYPoolUTF8String(CYPool &pool, JSContextRef context, JSStringRef value) {
 117     return CYPoolUTF8String(pool, CYCastUTF16String(value));
 118 }
 119
 120 const char *CYPoolCString(CYPool &pool, JSContextRef context, JSStringRef value) {
 121     CYUTF8String utf8(CYPoolUTF8String(pool, context, value));
 122     _assert(memchr(utf8.data, '\0', utf8.size) == NULL);
 123     return utf8.data;
 124 }
 125
 126 const char *CYPoolCString(CYPool &pool, JSContextRef context, JSValueRef value) {
 127     return JSValueIsNull(context, value) ? NULL : CYPoolCString(pool, context, CYJSString(context, value));
 128 }
 129 /* }}} */
 130 /* Index Offsets {{{ */
 131 size_t CYGetIndex(CYPool &pool, JSContextRef context, JSStringRef value) {
 132     return CYGetIndex(CYPoolUTF8String(pool, context, value));
 133 }
 134 /* }}} */
 135
 136 static JSClassRef All_;
 137 static JSClassRef Context_;
 138 JSClassRef Functor_;
 139 static JSClassRef Global_;
 140 static JSClassRef Pointer_;
 141 static JSClassRef Struct_;
 142
 143 JSStringRef Array_s;
 144 JSStringRef cy_s;
 145 JSStringRef cyi_s;
 146 JSStringRef length_s;
 147 JSStringRef message_s;
 148 JSStringRef name_s;
 149 JSStringRef pop_s;
 150 JSStringRef prototype_s;
 151 JSStringRef push_s;
 152 JSStringRef splice_s;
 153 JSStringRef toCYON_s;
 154 JSStringRef toJSON_s;
 155 JSStringRef toPointer_s;
 156 JSStringRef toString_s;
 157 JSStringRef weak_s;
 158
 159 static JSStringRef Result_;
 160
 161 void CYFinalize(JSObjectRef object) {
 162     CYData *internal(reinterpret_cast<CYData *>(JSObjectGetPrivate(object)));
 163     _assert(internal->count_ != _not(unsigned));
 164     if (--internal->count_ == 0)
 165         delete internal;
 166 }
 167
 168 void Structor_(CYPool &pool, sig::Type *&type) {
 169     if (
 170         type->primitive == sig::pointer_P &&
 171         type->data.data.type->primitive == sig::struct_P &&
 172         type->data.data.type->name != NULL &&
 173         strcmp(type->data.data.type->name, "_objc_class") == 0
 174     ) {
 175         type->primitive = sig::typename_P;
 176         type->data.data.type = NULL;
 177         return;
 178     }
 179
 180     if (type->primitive != sig::struct_P || type->name == NULL)
 181         return;
 182
 183     size_t length(strlen(type->name));
 184     char keyed[length + 2];
 185     memcpy(keyed + 1, type->name, length + 1);
 186
 187     static const char *modes = "34";
 188     for (size_t i(0); i != 2; ++i) {
 189         char mode(modes[i]);
 190         keyed[0] = mode;
 191
 192         if (CYBridgeEntry *entry = CYBridgeHash(keyed, length + 1))
 193             switch (mode) {
 194                 case '3':
 195                     sig::Parse(pool, &type->data.signature, entry->value_, &Structor_);
 196                 break;
 197
 198                 case '4': {
 199                     sig::Signature signature;
 200                     sig::Parse(pool, &signature, entry->value_, &Structor_);
 201                     type = signature.elements[0].type;
 202                 } break;
 203             }
 204     }
 205 }
 206
 207 JSClassRef Type_privateData::Class_;
 208
 209 struct Context :
 210     CYData
 211 {
 212     JSGlobalContextRef context_;
 213
 214     Context(JSGlobalContextRef context) :
 215         context_(context)
 216     {
 217     }
 218 };
 219
 220 struct Pointer :
 221     CYOwned
 222 {
 223     Type_privateData *type_;
 224     size_t length_;
 225
 226     Pointer(void *value, JSContextRef context, JSObjectRef owner, size_t length, sig::Type *type) :
 227         CYOwned(value, context, owner),
 228         type_(new(*pool_) Type_privateData(type)),
 229         length_(length)
 230     {
 231     }
 232 };
 233
 234 struct Struct_privateData :
 235     CYOwned
 236 {
 237     Type_privateData *type_;
 238
 239     Struct_privateData(JSContextRef context, JSObjectRef owner) :
 240         CYOwned(NULL, context, owner)
 241     {
 242     }
 243 };
 244
 245 JSObjectRef CYMakeStruct(JSContextRef context, void *data, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 246     Struct_privateData *internal(new Struct_privateData(context, owner));
 247     CYPool &pool(*internal->pool_);
 248     Type_privateData *typical(new(pool) Type_privateData(type, ffi));
 249     internal->type_ = typical;
 250
 251     if (owner != NULL)
 252         internal->value_ = data;
 253     else {
 254         size_t size(typical->GetFFI()->size);
 255         void *copy(internal->pool_->malloc<void>(size));
 256         memcpy(copy, data, size);
 257         internal->value_ = copy;
 258     }
 259
 260     return JSObjectMake(context, Struct_, internal);
 261 }
 262
 263 static void *CYCastSymbol(const char *name) {
 264     for (CYHook *hook : GetHooks())
 265         if (hook->CastSymbol != NULL)
 266             if (void *value = (*hook->CastSymbol)(name))
 267                 return value;
 268     return dlsym(RTLD_DEFAULT, name);
 269 }
 270
 271 JSValueRef CYCastJSValue(JSContextRef context, bool value) {
 272     return JSValueMakeBoolean(context, value);
 273 }
 274
 275 JSValueRef CYCastJSValue(JSContextRef context, double value) {
 276     return JSValueMakeNumber(context, value);
 277 }
 278
 279 #define CYCastJSValue_(Type_) \
 280     JSValueRef CYCastJSValue(JSContextRef context, Type_ value) { \
 281         return JSValueMakeNumber(context, static_cast<double>(value)); \
 282     }
 283
 284 CYCastJSValue_(int)
 285 CYCastJSValue_(unsigned int)
 286 CYCastJSValue_(long int)
 287 CYCastJSValue_(long unsigned int)
 288 CYCastJSValue_(long long int)
 289 CYCastJSValue_(long long unsigned int)
 290
 291 JSValueRef CYJSUndefined(JSContextRef context) {
 292     return JSValueMakeUndefined(context);
 293 }
 294
 295 double CYCastDouble(JSContextRef context, JSValueRef value) {
 296     return _jsccall(JSValueToNumber, context, value);
 297 }
 298
 299 bool CYCastBool(JSContextRef context, JSValueRef value) {
 300     return JSValueToBoolean(context, value);
 301 }
 302
 303 JSValueRef CYJSNull(JSContextRef context) {
 304     return JSValueMakeNull(context);
 305 }
 306
 307 JSValueRef CYCastJSValue(JSContextRef context, JSStringRef value) {
 308     return value == NULL ? CYJSNull(context) : JSValueMakeString(context, value);
 309 }
 310
 311 JSValueRef CYCastJSValue(JSContextRef context, const char *value) {
 312     return CYCastJSValue(context, CYJSString(value));
 313 }
 314
 315 JSObjectRef CYCastJSObject(JSContextRef context, JSValueRef value) {
 316     return _jsccall(JSValueToObject, context, value);
 317 }
 318
 319 JSValueRef CYCallAsFunction(JSContextRef context, JSObjectRef function, JSObjectRef _this, size_t count, const JSValueRef arguments[]) {
 320     return _jsccall(JSObjectCallAsFunction, context, function, _this, count, arguments);
 321 }
 322
 323 bool CYIsCallable(JSContextRef context, JSValueRef value) {
 324     return value != NULL && JSValueIsObject(context, value) && JSObjectIsFunction(context, (JSObjectRef) value);
 325 }
 326
 327 bool CYIsEqual(JSContextRef context, JSValueRef lhs, JSValueRef rhs) {
 328     return _jsccall(JSValueIsEqual, context, lhs, rhs);
 329 }
 330
 331 bool CYIsStrictEqual(JSContextRef context, JSValueRef lhs, JSValueRef rhs) {
 332     return JSValueIsStrictEqual(context, lhs, rhs);
 333 }
 334
 335 size_t CYArrayLength(JSContextRef context, JSObjectRef array) {
 336     return CYCastDouble(context, CYGetProperty(context, array, length_s));
 337 }
 338
 339 JSValueRef CYArrayGet(JSContextRef context, JSObjectRef array, size_t index) {
 340     return _jsccall(JSObjectGetPropertyAtIndex, context, array, index);
 341 }
 342
 343 void CYArrayPush(JSContextRef context, JSObjectRef array, JSValueRef value) {
 344     JSValueRef arguments[1];
 345     arguments[0] = value;
 346     JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array_prototype")));
 347     _jsccall(JSObjectCallAsFunction, context, CYCastJSObject(context, CYGetProperty(context, Array, push_s)), array, 1, arguments);
 348 }
 349
 350 static JSValueRef System_print(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 351     if (count == 0)
 352         printf("\n");
 353     else {
 354         CYPool pool;
 355         printf("%s\n", CYPoolCString(pool, context, arguments[0]));
 356     }
 357
 358     return CYJSUndefined(context);
 359 } CYCatch(NULL) }
 360
 361 static size_t Nonce_(0);
 362
 363 static JSValueRef $cyq(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 364     CYPool pool;
 365     const char *name(pool.strcat(CYPoolCString(pool, context, arguments[0]), pool.itoa(Nonce_++), NULL));
 366     return CYCastJSValue(context, name);
 367 } CYCatch(NULL) }
 368
 369 static void (*JSSynchronousGarbageCollectForDebugging$)(JSContextRef);
 370
 371 void CYGarbageCollect(JSContextRef context) {
 372     (JSSynchronousGarbageCollectForDebugging$ ?: &JSGarbageCollect)(context);
 373 }
 374
 375 static JSValueRef Cycript_gc_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 376     CYGarbageCollect(context);
 377     return CYJSUndefined(context);
 378 } CYCatch(NULL) }
 379
 380 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSValueRef value, std::set<void *> &objects, JSValueRef *exception) { CYTry {
 381     switch (JSType type = JSValueGetType(context, value)) {
 382         case kJSTypeUndefined:
 383             return "undefined";
 384         case kJSTypeNull:
 385             return "null";
 386         case kJSTypeBoolean:
 387             return CYCastBool(context, value) ? "true" : "false";
 388
 389         case kJSTypeNumber: {
 390             std::ostringstream str;
 391             CYNumerify(str, CYCastDouble(context, value));
 392             std::string value(str.str());
 393             return pool.strmemdup(value.c_str(), value.size());
 394         } break;
 395
 396         case kJSTypeString: {
 397             std::ostringstream str;
 398             CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, value)));
 399             CYStringify(str, string.data, string.size);
 400             std::string value(str.str());
 401             return pool.strmemdup(value.c_str(), value.size());
 402         } break;
 403
 404         case kJSTypeObject:
 405             return CYPoolCCYON(pool, context, (JSObjectRef) value, objects);
 406         default:
 407             throw CYJSError(context, "JSValueGetType() == 0x%x", type);
 408     }
 409 } CYCatch(NULL) }
 410
 411 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSValueRef value, std::set<void *> &objects) {
 412     return _jsccall(CYPoolCCYON, pool, context, value, objects);
 413 }
 414
 415 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSValueRef value, std::set<void *> *objects) {
 416     if (objects != NULL)
 417         return CYPoolCCYON(pool, context, value, *objects);
 418     else {
 419         std::set<void *> objects;
 420         return CYPoolCCYON(pool, context, value, objects);
 421     }
 422 }
 423
 424 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSObjectRef object, std::set<void *> &objects) {
 425     JSValueRef toCYON(CYGetProperty(context, object, toCYON_s));
 426     if (CYIsCallable(context, toCYON)) {
 427         // XXX: this needs to be abstracted behind some kind of function
 428         JSValueRef arguments[1] = {CYCastJSValue(context, static_cast<double>(reinterpret_cast<uintptr_t>(&objects)))};
 429         JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toCYON, object, 1, arguments));
 430         _assert(value != NULL);
 431         return CYPoolCString(pool, context, value);
 432     }
 433
 434     JSValueRef toJSON(CYGetProperty(context, object, toJSON_s));
 435     if (CYIsCallable(context, toJSON)) {
 436         JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 437         return _jsccall(CYPoolCCYON, pool, context, CYCallAsFunction(context, (JSObjectRef) toJSON, object, 1, arguments), objects);
 438     }
 439
 440     if (JSObjectIsFunction(context, object)) {
 441         JSValueRef toString(CYGetProperty(context, object, toString_s));
 442         if (CYIsCallable(context, toString)) {
 443             JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 444             JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toString, object, 1, arguments));
 445             _assert(value != NULL);
 446             return CYPoolCString(pool, context, value);
 447         }
 448     }
 449
 450     _assert(objects.insert(object).second);
 451
 452     std::ostringstream str;
 453
 454     str << '{';
 455
 456     // XXX: this is, sadly, going to leak
 457     JSPropertyNameArrayRef names(JSObjectCopyPropertyNames(context, object));
 458
 459     bool comma(false);
 460
 461     for (size_t index(0), count(JSPropertyNameArrayGetCount(names)); index != count; ++index) {
 462         if (comma)
 463             str << ',';
 464         else
 465             comma = true;
 466
 467         JSStringRef name(JSPropertyNameArrayGetNameAtIndex(names, index));
 468         CYUTF8String string(CYPoolUTF8String(pool, context, name));
 469
 470         if (CYIsKey(string))
 471             str << string.data;
 472         else
 473             CYStringify(str, string.data, string.size);
 474
 475         str << ':';
 476
 477         try {
 478             JSValueRef value(CYGetProperty(context, object, name));
 479             str << CYPoolCCYON(pool, context, value, objects);
 480         } catch (const CYException &error) {
 481             str << "@error";
 482         }
 483     }
 484
 485     JSPropertyNameArrayRelease(names);
 486
 487     str << '}';
 488
 489     std::string string(str.str());
 490     return pool.strmemdup(string.c_str(), string.size());
 491 }
 492
 493 std::set<void *> *CYCastObjects(JSContextRef context, JSObjectRef _this, size_t count, const JSValueRef arguments[]) {
 494     if (count == 0)
 495         return NULL;
 496     return CYCastPointer<std::set<void *> *>(context, arguments[0]);
 497 }
 498
 499 static JSValueRef Array_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 500     std::set<void *> *objects(CYCastObjects(context, _this, count, arguments));
 501     // XXX: this is horribly inefficient
 502     std::set<void *> backup;
 503     if (objects == NULL)
 504         objects = &backup;
 505
 506     CYPool pool;
 507     std::ostringstream str;
 508
 509     str << '[';
 510
 511     JSValueRef length(CYGetProperty(context, _this, length_s));
 512     bool comma(false);
 513
 514     for (size_t index(0), count(CYCastDouble(context, length)); index != count; ++index) {
 515         if (comma)
 516             str << ',';
 517         else
 518             comma = true;
 519
 520         try {
 521             JSValueRef value(CYGetProperty(context, _this, index));
 522             if (!JSValueIsUndefined(context, value))
 523                 str << CYPoolCCYON(pool, context, value, *objects);
 524             else {
 525                 str << ',';
 526                 comma = false;
 527             }
 528         } catch (const CYException &error) {
 529             str << "@error";
 530         }
 531     }
 532
 533     str << ']';
 534
 535     std::string value(str.str());
 536     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 537 } CYCatch(NULL) }
 538
 539 static JSValueRef String_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 540     CYPool pool;
 541     std::ostringstream str;
 542
 543     CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, _this)));
 544     CYStringify(str, string.data, string.size);
 545
 546     std::string value(str.str());
 547     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 548 } CYCatch(NULL) }
 549
 550 JSObjectRef CYMakePointer(JSContextRef context, void *pointer, size_t length, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 551     Pointer *internal(new Pointer(pointer, context, owner, length, type));
 552     return JSObjectMake(context, Pointer_, internal);
 553 }
 554
 555 static JSObjectRef CYMakeFunctor(JSContextRef context, void (*function)(), const sig::Signature &signature) {
 556     return JSObjectMake(context, Functor_, new cy::Functor(signature, function));
 557 }
 558
 559 static JSObjectRef CYMakeFunctor(JSContextRef context, const char *symbol, const char *encoding, void **cache) {
 560     cy::Functor *internal;
 561     if (*cache != NULL)
 562         internal = reinterpret_cast<cy::Functor *>(*cache);
 563     else {
 564         void (*function)()(reinterpret_cast<void (*)()>(CYCastSymbol(symbol)));
 565         if (function == NULL)
 566             return NULL;
 567
 568         internal = new cy::Functor(encoding, function);
 569         *cache = internal;
 570     }
 571
 572     ++internal->count_;
 573     return JSObjectMake(context, Functor_, internal);
 574 }
 575
 576 static bool CYGetOffset(CYPool &pool, JSContextRef context, JSStringRef value, ssize_t &index) {
 577     return CYGetOffset(CYPoolCString(pool, context, value), index);
 578 }
 579
 580 void *CYCastPointer_(JSContextRef context, JSValueRef value) {
 581     if (value == NULL)
 582         return NULL;
 583     else switch (JSValueGetType(context, value)) {
 584         case kJSTypeNull:
 585             return NULL;
 586         case kJSTypeObject: {
 587             JSObjectRef object((JSObjectRef) value);
 588             if (JSValueIsObjectOfClass(context, value, Pointer_)) {
 589                 Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 590                 return internal->value_;
 591             }
 592             JSValueRef toPointer(CYGetProperty(context, object, toPointer_s));
 593             if (CYIsCallable(context, toPointer)) {
 594                 JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toPointer, object, 0, NULL));
 595                 _assert(value != NULL);
 596                 return CYCastPointer_(context, value);
 597             }
 598         } default:
 599             double number(CYCastDouble(context, value));
 600             if (std::isnan(number))
 601                 throw CYJSError(context, "cannot convert value to pointer");
 602             return reinterpret_cast<void *>(static_cast<uintptr_t>(static_cast<long long>(number)));
 603     }
 604 }
 605
 606 void CYPoolFFI(CYPool *pool, JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, JSValueRef value) {
 607     switch (type->primitive) {
 608         case sig::boolean_P:
 609             *reinterpret_cast<bool *>(data) = JSValueToBoolean(context, value);
 610         break;
 611
 612 #define CYPoolFFI_(primitive, native) \
 613         case sig::primitive ## _P: \
 614             *reinterpret_cast<native *>(data) = CYCastDouble(context, value); \
 615         break;
 616
 617         CYPoolFFI_(uchar, unsigned char)
 618         CYPoolFFI_(char, char)
 619         CYPoolFFI_(ushort, unsigned short)
 620         CYPoolFFI_(short, short)
 621         CYPoolFFI_(ulong, unsigned long)
 622         CYPoolFFI_(long, long)
 623         CYPoolFFI_(uint, unsigned int)
 624         CYPoolFFI_(int, int)
 625         CYPoolFFI_(ulonglong, unsigned long long)
 626         CYPoolFFI_(longlong, long long)
 627         CYPoolFFI_(float, float)
 628         CYPoolFFI_(double, double)
 629
 630         case sig::array_P: {
 631             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 632             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 633             for (size_t index(0); index != type->data.data.size; ++index) {
 634                 ffi_type *field(ffi->elements[index]);
 635
 636                 JSValueRef rhs;
 637                 if (aggregate == NULL)
 638                     rhs = value;
 639                 else {
 640                     rhs = CYGetProperty(context, aggregate, index);
 641                     if (JSValueIsUndefined(context, rhs))
 642                         throw CYJSError(context, "unable to extract array value");
 643                 }
 644
 645                 CYPoolFFI(pool, context, type->data.data.type, field, base, rhs);
 646                 // XXX: alignment?
 647                 base += field->size;
 648             }
 649         } break;
 650
 651         case sig::pointer_P:
 652             *reinterpret_cast<void **>(data) = CYCastPointer<void *>(context, value);
 653         break;
 654
 655         case sig::string_P:
 656             _assert(pool != NULL);
 657             *reinterpret_cast<const char **>(data) = CYPoolCString(*pool, context, value);
 658         break;
 659
 660         case sig::struct_P: {
 661             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 662             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 663             for (size_t index(0); index != type->data.signature.count; ++index) {
 664                 sig::Element *element(&type->data.signature.elements[index]);
 665                 ffi_type *field(ffi->elements[index]);
 666
 667                 JSValueRef rhs;
 668                 if (aggregate == NULL)
 669                     rhs = value;
 670                 else {
 671                     rhs = CYGetProperty(context, aggregate, index);
 672                     if (JSValueIsUndefined(context, rhs)) {
 673                         if (element->name != NULL)
 674                             rhs = CYGetProperty(context, aggregate, CYJSString(element->name));
 675                         else
 676                             goto undefined;
 677                         if (JSValueIsUndefined(context, rhs)) undefined:
 678                             throw CYJSError(context, "unable to extract structure value");
 679                     }
 680                 }
 681
 682                 CYPoolFFI(pool, context, element->type, field, base, rhs);
 683                 // XXX: alignment?
 684                 base += field->size;
 685             }
 686         } break;
 687
 688         case sig::void_P:
 689         break;
 690
 691         default:
 692             for (CYHook *hook : GetHooks())
 693                 if (hook->PoolFFI != NULL)
 694                     if ((*hook->PoolFFI)(pool, context, type, ffi, data, value))
 695                         return;
 696
 697             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 698     }
 699 }
 700
 701 JSValueRef CYFromFFI(JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, bool initialize, JSObjectRef owner) {
 702     switch (type->primitive) {
 703         case sig::boolean_P:
 704             return CYCastJSValue(context, *reinterpret_cast<bool *>(data));
 705
 706 #define CYFromFFI_(primitive, native) \
 707         case sig::primitive ## _P: \
 708             return CYCastJSValue(context, *reinterpret_cast<native *>(data)); \
 709
 710         CYFromFFI_(uchar, unsigned char)
 711         CYFromFFI_(char, char)
 712         CYFromFFI_(ushort, unsigned short)
 713         CYFromFFI_(short, short)
 714         CYFromFFI_(ulong, unsigned long)
 715         CYFromFFI_(long, long)
 716         CYFromFFI_(uint, unsigned int)
 717         CYFromFFI_(int, int)
 718         CYFromFFI_(ulonglong, unsigned long long)
 719         CYFromFFI_(longlong, long long)
 720         CYFromFFI_(float, float)
 721         CYFromFFI_(double, double)
 722
 723         case sig::array_P:
 724             if (void *pointer = data)
 725                 return CYMakePointer(context, pointer, type->data.data.size, type->data.data.type, NULL, owner);
 726             else goto null;
 727
 728         case sig::pointer_P:
 729             if (void *pointer = *reinterpret_cast<void **>(data))
 730                 return CYMakePointer(context, pointer, _not(size_t), type->data.data.type, NULL, owner);
 731             else goto null;
 732
 733         case sig::string_P:
 734             if (char *utf8 = *reinterpret_cast<char **>(data))
 735                 return CYCastJSValue(context, utf8);
 736             else goto null;
 737
 738         case sig::struct_P:
 739             return CYMakeStruct(context, data, type, ffi, owner);
 740         case sig::void_P:
 741             return CYJSUndefined(context);
 742
 743         null:
 744             return CYJSNull(context);
 745         default:
 746             for (CYHook *hook : GetHooks())
 747                 if (hook->FromFFI != NULL)
 748                     if (JSValueRef value = (*hook->FromFFI)(context, type, ffi, data, initialize, owner))
 749                         return value;
 750
 751             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 752     }
 753 }
 754
 755 void CYExecuteClosure(ffi_cif *cif, void *result, void **arguments, void *arg, JSValueRef (*adapter)(JSContextRef, size_t, JSValueRef[], JSObjectRef)) {
 756     Closure_privateData *internal(reinterpret_cast<Closure_privateData *>(arg));
 757
 758     JSContextRef context(internal->context_);
 759
 760     size_t count(internal->cif_.nargs);
 761     JSValueRef values[count];
 762
 763     for (size_t index(0); index != count; ++index)
 764         values[index] = CYFromFFI(context, internal->signature_.elements[1 + index].type, internal->cif_.arg_types[index], arguments[index]);
 765
 766     JSValueRef value(adapter(context, count, values, internal->function_));
 767     CYPoolFFI(NULL, context, internal->signature_.elements[0].type, internal->cif_.rtype, result, value);
 768 }
 769
 770 static JSValueRef FunctionAdapter_(JSContextRef context, size_t count, JSValueRef values[], JSObjectRef function) {
 771     return CYCallAsFunction(context, function, NULL, count, values);
 772 }
 773
 774 static void FunctionClosure_(ffi_cif *cif, void *result, void **arguments, void *arg) {
 775     CYExecuteClosure(cif, result, arguments, arg, &FunctionAdapter_);
 776 }
 777
 778 Closure_privateData *CYMakeFunctor_(JSContextRef context, JSObjectRef function, const sig::Signature &signature, void (*callback)(ffi_cif *, void *, void **, void *)) {
 779     // XXX: in case of exceptions this will leak
 780     // XXX: in point of fact, this may /need/ to leak :(
 781     Closure_privateData *internal(new Closure_privateData(context, function, signature));
 782
 783 #if defined(__APPLE__) && (defined(__arm__) || defined(__arm64__))
 784     void *executable;
 785     ffi_closure *writable(reinterpret_cast<ffi_closure *>(ffi_closure_alloc(sizeof(ffi_closure), &executable)));
 786
 787     ffi_status status(ffi_prep_closure_loc(writable, &internal->cif_, callback, internal, executable));
 788     _assert(status == FFI_OK);
 789
 790     internal->value_ = executable;
 791 #else
 792     ffi_closure *closure((ffi_closure *) _syscall(mmap(
 793         NULL, sizeof(ffi_closure),
 794         PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE,
 795         -1, 0
 796     )));
 797
 798     ffi_status status(ffi_prep_closure(closure, &internal->cif_, callback, internal));
 799     _assert(status == FFI_OK);
 800
 801     _syscall(mprotect(closure, sizeof(*closure), PROT_READ | PROT_EXEC));
 802
 803     internal->value_ = closure;
 804 #endif
 805
 806     return internal;
 807 }
 808
 809 static JSObjectRef CYMakeFunctor(JSContextRef context, JSObjectRef function, const sig::Signature &signature) {
 810     Closure_privateData *internal(CYMakeFunctor_(context, function, signature, &FunctionClosure_));
 811     JSObjectRef object(JSObjectMake(context, Functor_, internal));
 812     // XXX: see above notes about needing to leak
 813     JSValueProtect(CYGetJSContext(context), object);
 814     return object;
 815 }
 816
 817 JSValueRef CYGetCachedValue(JSContextRef context, JSStringRef name) {
 818     return CYGetProperty(context, CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s)), name);
 819 }
 820
 821 JSObjectRef CYGetCachedObject(JSContextRef context, JSStringRef name) {
 822     return CYCastJSObject(context, CYGetCachedValue(context, name));
 823 }
 824
 825 static JSObjectRef CYMakeFunctor(JSContextRef context, JSValueRef value, const sig::Signature &signature) {
 826     JSObjectRef Function(CYGetCachedObject(context, CYJSString("Function")));
 827
 828     bool function(_jsccall(JSValueIsInstanceOfConstructor, context, value, Function));
 829     if (function) {
 830         JSObjectRef function(CYCastJSObject(context, value));
 831         return CYMakeFunctor(context, function, signature);
 832     } else {
 833         void (*function)()(CYCastPointer<void (*)()>(context, value));
 834         return CYMakeFunctor(context, function, signature);
 835     }
 836 }
 837
 838 static bool Index_(CYPool &pool, JSContextRef context, Struct_privateData *internal, JSStringRef property, ssize_t &index, uint8_t *&base) {
 839     Type_privateData *typical(internal->type_);
 840     sig::Type *type(typical->type_);
 841     if (type == NULL)
 842         return false;
 843
 844     const char *name(CYPoolCString(pool, context, property));
 845     size_t length(strlen(name));
 846     double number(CYCastDouble(name, length));
 847
 848     size_t count(type->data.signature.count);
 849
 850     if (std::isnan(number)) {
 851         if (property == NULL)
 852             return false;
 853
 854         sig::Element *elements(type->data.signature.elements);
 855
 856         for (size_t local(0); local != count; ++local) {
 857             sig::Element *element(&elements[local]);
 858             if (element->name != NULL && strcmp(name, element->name) == 0) {
 859                 index = local;
 860                 goto base;
 861             }
 862         }
 863
 864         return false;
 865     } else {
 866         index = static_cast<ssize_t>(number);
 867         if (index != number || index < 0 || static_cast<size_t>(index) >= count)
 868             return false;
 869     }
 870
 871   base:
 872     ffi_type **elements(typical->GetFFI()->elements);
 873
 874     base = reinterpret_cast<uint8_t *>(internal->value_);
 875     for (ssize_t local(0); local != index; ++local)
 876         base += elements[local]->size;
 877
 878     return true;
 879 }
 880
 881 static JSValueRef Pointer_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 882     CYPool pool;
 883     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 884
 885     if (JSStringIsEqual(property, length_s))
 886         return internal->length_ == _not(size_t) ? CYJSUndefined(context) : CYCastJSValue(context, internal->length_);
 887
 888     Type_privateData *typical(internal->type_);
 889     if (typical->type_ == NULL)
 890         return NULL;
 891     sig::Type &type(*typical->type_);
 892
 893     ssize_t offset;
 894     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 895         offset = 0;
 896     else if (!CYGetOffset(pool, context, property, offset))
 897         return NULL;
 898
 899     if (type.primitive == sig::function_P)
 900         return CYMakeFunctor(context, reinterpret_cast<void (*)()>(internal->value_), type.data.signature);
 901
 902     ffi_type *ffi(typical->GetFFI());
 903
 904     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 905     base += ffi->size * offset;
 906
 907     JSObjectRef owner(internal->GetOwner() ?: object);
 908     return CYFromFFI(context, &type, ffi, base, false, owner);
 909 } CYCatch(NULL) }
 910
 911 static bool Pointer_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 912     CYPool pool;
 913     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 914     Type_privateData *typical(internal->type_);
 915
 916     if (typical->type_ == NULL)
 917         return false;
 918
 919     ssize_t offset;
 920     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 921         offset = 0;
 922     else if (!CYGetOffset(pool, context, property, offset))
 923         return false;
 924
 925     ffi_type *ffi(typical->GetFFI());
 926
 927     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 928     base += ffi->size * offset;
 929
 930     CYPoolFFI(NULL, context, typical->type_, ffi, base, value);
 931     return true;
 932 } CYCatch(false) }
 933
 934 static JSValueRef Struct_callAsFunction_$cya(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 935     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(_this)));
 936     Type_privateData *typical(internal->type_);
 937     return CYMakePointer(context, internal->value_, _not(size_t), typical->type_, typical->ffi_, _this);
 938 } CYCatch(NULL) }
 939
 940 static JSValueRef Struct_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 941     CYPool pool;
 942     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 943     Type_privateData *typical(internal->type_);
 944
 945     ssize_t index;
 946     uint8_t *base;
 947
 948     if (!Index_(pool, context, internal, property, index, base))
 949         return NULL;
 950
 951     JSObjectRef owner(internal->GetOwner() ?: object);
 952
 953     return CYFromFFI(context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, false, owner);
 954 } CYCatch(NULL) }
 955
 956 static bool Struct_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 957     CYPool pool;
 958     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 959     Type_privateData *typical(internal->type_);
 960
 961     ssize_t index;
 962     uint8_t *base;
 963
 964     if (!Index_(pool, context, internal, property, index, base))
 965         return false;
 966
 967     CYPoolFFI(NULL, context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, value);
 968     return true;
 969 } CYCatch(false) }
 970
 971 static void Struct_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
 972     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 973     Type_privateData *typical(internal->type_);
 974     sig::Type *type(typical->type_);
 975
 976     if (type == NULL)
 977         return;
 978
 979     size_t count(type->data.signature.count);
 980     sig::Element *elements(type->data.signature.elements);
 981
 982     char number[32];
 983
 984     for (size_t index(0); index != count; ++index) {
 985         const char *name;
 986         name = elements[index].name;
 987
 988         if (name == NULL) {
 989             sprintf(number, "%zu", index);
 990             name = number;
 991         }
 992
 993         JSPropertyNameAccumulatorAddName(names, CYJSString(name));
 994     }
 995 }
 996
 997 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)()) {
 998     if (setups + count != signature->count - 1)
 999         throw CYJSError(context, "incorrect number of arguments to ffi function");
1000
1001     size_t size(setups + count);
1002     void *values[size];
1003     memcpy(values, setup, sizeof(void *) * setups);
1004
1005     for (size_t index(setups); index != size; ++index) {
1006         sig::Element *element(&signature->elements[index + 1]);
1007         ffi_type *ffi(cif->arg_types[index]);
1008         // XXX: alignment?
1009         values[index] = new(pool) uint8_t[ffi->size];
1010         CYPoolFFI(&pool, context, element->type, ffi, values[index], arguments[index - setups]);
1011     }
1012
1013     uint8_t value[cif->rtype->size];
1014
1015     for (CYHook *hook : GetHooks())
1016         if (hook->CallFunction != NULL) {
1017             // XXX: this only supports one hook, but it is a bad idea anyway
1018             (*hook->CallFunction)(context, cif, function, value, values);
1019             goto from;
1020         }
1021     ffi_call(cif, function, value, values);
1022
1023   from:
1024     return CYFromFFI(context, signature->elements[0].type, cif->rtype, value, initialize);
1025 }
1026
1027 static JSValueRef Functor_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1028     CYPool pool;
1029     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
1030     return CYCallFunction(pool, context, 0, NULL, count, arguments, false, &internal->signature_, &internal->cif_, internal->GetValue());
1031 } CYCatch(NULL) }
1032
1033 JSObjectRef CYMakeType(JSContextRef context, const char *encoding) {
1034     Type_privateData *internal(new Type_privateData(encoding));
1035     return JSObjectMake(context, Type_privateData::Class_, internal);
1036 }
1037
1038 JSObjectRef CYMakeType(JSContextRef context, sig::Type *type) {
1039     Type_privateData *internal(new Type_privateData(type));
1040     return JSObjectMake(context, Type_privateData::Class_, internal);
1041 }
1042
1043 JSObjectRef CYMakeType(JSContextRef context, sig::Signature *signature) {
1044     CYPool pool;
1045
1046     sig::Type type;
1047     type.name = NULL;
1048     type.flags = 0;
1049
1050     type.primitive = sig::function_P;
1051     sig::Copy(pool, type.data.signature, *signature);
1052
1053     return CYMakeType(context, &type);
1054 }
1055
1056 static bool All_hasProperty(JSContextRef context, JSObjectRef object, JSStringRef property) {
1057     JSObjectRef global(CYGetGlobalObject(context));
1058     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
1059     JSObjectRef alls(CYCastJSObject(context, CYGetProperty(context, cycript, CYJSString("alls"))));
1060
1061     for (size_t i(0), count(CYArrayLength(context, alls)); i != count; ++i)
1062         if (JSObjectRef space = CYCastJSObject(context, CYArrayGet(context, alls, count - i - 1)))
1063             if (CYHasProperty(context, space, property))
1064                 return true;
1065
1066     CYPool pool;
1067     CYUTF8String name(CYPoolUTF8String(pool, context, property));
1068
1069     size_t length(name.size);
1070     char keyed[length + 2];
1071     memcpy(keyed + 1, name.data, length + 1);
1072
1073     static const char *modes = "0124";
1074     for (size_t i(0); i != 4; ++i) {
1075         keyed[0] = modes[i];
1076         if (CYBridgeHash(keyed, length + 1) != NULL)
1077             return true;
1078     }
1079
1080     return false;
1081 }
1082
1083 static JSValueRef All_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1084     JSObjectRef global(CYGetGlobalObject(context));
1085     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
1086     JSObjectRef alls(CYCastJSObject(context, CYGetProperty(context, cycript, CYJSString("alls"))));
1087
1088     for (size_t i(0), count(CYArrayLength(context, alls)); i != count; ++i)
1089         if (JSObjectRef space = CYCastJSObject(context, CYArrayGet(context, alls, count - i - 1)))
1090             if (JSValueRef value = CYGetProperty(context, space, property))
1091                 if (!JSValueIsUndefined(context, value))
1092                     return value;
1093
1094     CYPool pool;
1095     CYUTF8String name(CYPoolUTF8String(pool, context, property));
1096
1097     size_t length(name.size);
1098     char keyed[length + 2];
1099     memcpy(keyed + 1, name.data, length + 1);
1100
1101     static const char *modes = "0124";
1102     for (size_t i(0); i != 4; ++i) {
1103         char mode(modes[i]);
1104         keyed[0] = mode;
1105
1106         if (CYBridgeEntry *entry = CYBridgeHash(keyed, length + 1))
1107             switch (mode) {
1108                 case '0':
1109                     return JSEvaluateScript(CYGetJSContext(context), CYJSString(entry->value_), NULL, NULL, 0, NULL);
1110
1111                 case '1':
1112                     return CYMakeFunctor(context, name.data, entry->value_, &entry->cache_);
1113
1114                 case '2':
1115                     if (void *symbol = CYCastSymbol(name.data)) {
1116                         // XXX: this is horrendously inefficient
1117                         sig::Signature signature;
1118                         sig::Parse(pool, &signature, entry->value_, &Structor_);
1119                         ffi_cif cif;
1120                         sig::sig_ffi_cif(pool, &sig::ObjectiveC, &signature, &cif);
1121                         return CYFromFFI(context, signature.elements[0].type, cif.rtype, symbol);
1122                     } else return NULL;
1123
1124                 // XXX: implement case 3
1125                 case '4':
1126                     return CYMakeType(context, entry->value_);
1127             }
1128     }
1129
1130     return NULL;
1131 } CYCatch(NULL) }
1132
1133 static void All_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
1134     JSObjectRef global(CYGetGlobalObject(context));
1135     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
1136     JSObjectRef alls(CYCastJSObject(context, CYGetProperty(context, cycript, CYJSString("alls"))));
1137
1138     for (size_t i(0), count(CYArrayLength(context, alls)); i != count; ++i)
1139         if (JSObjectRef space = CYCastJSObject(context, CYArrayGet(context, alls, count - i - 1))) {
1140             JSPropertyNameArrayRef subset(JSObjectCopyPropertyNames(context, space));
1141             for (size_t index(0), count(JSPropertyNameArrayGetCount(subset)); index != count; ++index)
1142                 JSPropertyNameAccumulatorAddName(names, JSPropertyNameArrayGetNameAtIndex(subset, index));
1143             JSPropertyNameArrayRelease(subset);
1144         }
1145 }
1146
1147 static JSObjectRef Pointer_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 Pointer constructor");
1150
1151     CYPool pool;
1152
1153     void *value(CYCastPointer<void *>(context, arguments[0]));
1154     const char *type(CYPoolCString(pool, context, arguments[1]));
1155
1156     sig::Signature signature;
1157     sig::Parse(pool, &signature, type, &Structor_);
1158
1159     return CYMakePointer(context, value, _not(size_t), signature.elements[0].type, NULL, NULL);
1160 } CYCatch(NULL) }
1161
1162 static JSObjectRef Type_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1163     if (count != 1)
1164         throw CYJSError(context, "incorrect number of arguments to Type constructor");
1165     CYPool pool;
1166     const char *type(CYPoolCString(pool, context, arguments[0]));
1167     return CYMakeType(context, type);
1168 } CYCatch(NULL) }
1169
1170 static JSValueRef Type_callAsFunction_$With(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], sig::Primitive primitive, JSValueRef *exception) { CYTry {
1171     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1172
1173     CYPool pool;
1174
1175     sig::Type type;
1176     type.name = NULL;
1177     type.flags = 0;
1178
1179     type.primitive = primitive;
1180     type.data.signature.elements = new(pool) sig::Element[1 + count];
1181     type.data.signature.count = 1 + count;
1182
1183     type.data.signature.elements[0].name = NULL;
1184     type.data.signature.elements[0].type = internal->type_;
1185     type.data.signature.elements[0].offset = _not(size_t);
1186
1187     for (size_t i(0); i != count; ++i) {
1188         sig::Element &element(type.data.signature.elements[i + 1]);
1189         element.name = NULL;
1190         element.offset = _not(size_t);
1191
1192         JSObjectRef object(CYCastJSObject(context, arguments[i]));
1193         _assert(JSValueIsObjectOfClass(context, object, Type_privateData::Class_));
1194         Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1195
1196         element.type = internal->type_;
1197     }
1198
1199     return CYMakeType(context, &type);
1200 } CYCatch(NULL) }
1201
1202 static JSValueRef Type_callAsFunction_arrayOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1203     if (count != 1)
1204         throw CYJSError(context, "incorrect number of arguments to Type.arrayOf");
1205     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1206
1207     CYPool pool;
1208     size_t index(CYGetIndex(pool, context, CYJSString(context, arguments[0])));
1209     if (index == _not(size_t))
1210         throw CYJSError(context, "invalid array size used with Type.arrayOf");
1211
1212     sig::Type type;
1213     type.name = NULL;
1214     type.flags = 0;
1215
1216     type.primitive = sig::array_P;
1217     type.data.data.type = internal->type_;
1218     type.data.data.size = index;
1219
1220     return CYMakeType(context, &type);
1221 } CYCatch(NULL) }
1222
1223 static JSValueRef Type_callAsFunction_blockWith(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1224     return Type_callAsFunction_$With(context, object, _this, count, arguments, sig::block_P, exception);
1225 }
1226
1227 static JSValueRef Type_callAsFunction_constant(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1228     if (count != 0)
1229         throw CYJSError(context, "incorrect number of arguments to Type.constant");
1230     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1231
1232     sig::Type type(*internal->type_);
1233     type.flags |= JOC_TYPE_CONST;
1234     return CYMakeType(context, &type);
1235 } CYCatch(NULL) }
1236
1237 static JSValueRef Type_callAsFunction_long(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1238     if (count != 0)
1239         throw CYJSError(context, "incorrect number of arguments to Type.long");
1240     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1241
1242     sig::Type type(*internal->type_);
1243
1244     switch (type.primitive) {
1245         case sig::short_P: type.primitive = sig::int_P; break;
1246         case sig::int_P: type.primitive = sig::long_P; break;
1247         case sig::long_P: type.primitive = sig::longlong_P; break;
1248         default: throw CYJSError(context, "invalid type argument to Type.long");
1249     }
1250
1251     return CYMakeType(context, &type);
1252 } CYCatch(NULL) }
1253
1254 static JSValueRef Type_callAsFunction_short(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1255     if (count != 0)
1256         throw CYJSError(context, "incorrect number of arguments to Type.short");
1257     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1258
1259     sig::Type type(*internal->type_);
1260
1261     switch (type.primitive) {
1262         case sig::int_P: type.primitive = sig::short_P; break;
1263         case sig::long_P: type.primitive = sig::int_P; break;
1264         case sig::longlong_P: type.primitive = sig::long_P; break;
1265         default: throw CYJSError(context, "invalid type argument to Type.short");
1266     }
1267
1268     return CYMakeType(context, &type);
1269 } CYCatch(NULL) }
1270
1271 static JSValueRef Type_callAsFunction_signed(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1272     if (count != 0)
1273         throw CYJSError(context, "incorrect number of arguments to Type.signed");
1274     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1275
1276     sig::Type type(*internal->type_);
1277
1278     switch (type.primitive) {
1279         case sig::char_P: case sig::uchar_P: type.primitive = sig::char_P; break;
1280         case sig::short_P: case sig::ushort_P: type.primitive = sig::short_P; break;
1281         case sig::int_P: case sig::uint_P: type.primitive = sig::int_P; break;
1282         case sig::long_P: case sig::ulong_P: type.primitive = sig::long_P; break;
1283         case sig::longlong_P: case sig::ulonglong_P: type.primitive = sig::longlong_P; break;
1284         default: throw CYJSError(context, "invalid type argument to Type.signed");
1285     }
1286
1287     return CYMakeType(context, &type);
1288 } CYCatch(NULL) }
1289
1290 static JSValueRef Type_callAsFunction_unsigned(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1291     if (count != 0)
1292         throw CYJSError(context, "incorrect number of arguments to Type.unsigned");
1293     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1294
1295     sig::Type type(*internal->type_);
1296
1297     switch (type.primitive) {
1298         case sig::char_P: case sig::uchar_P: type.primitive = sig::uchar_P; break;
1299         case sig::short_P: case sig::ushort_P: type.primitive = sig::ushort_P; break;
1300         case sig::int_P: case sig::uint_P: type.primitive = sig::uint_P; break;
1301         case sig::long_P: case sig::ulong_P: type.primitive = sig::ulong_P; break;
1302         case sig::longlong_P: case sig::ulonglong_P: type.primitive = sig::ulonglong_P; break;
1303         default: throw CYJSError(context, "invalid type argument to Type.unsigned");
1304     }
1305
1306     return CYMakeType(context, &type);
1307 } CYCatch(NULL) }
1308
1309 static JSValueRef Type_callAsFunction_functionWith(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1310     return Type_callAsFunction_$With(context, object, _this, count, arguments, sig::function_P, exception);
1311 }
1312
1313 static JSValueRef Type_callAsFunction_pointerTo(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1314     if (count != 0)
1315         throw CYJSError(context, "incorrect number of arguments to Type.pointerTo");
1316     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1317
1318     sig::Type type;
1319     type.name = NULL;
1320
1321     if (internal->type_->primitive == sig::char_P) {
1322         type.flags = internal->type_->flags;
1323         type.primitive = sig::string_P;
1324         type.data.data.type = NULL;
1325         type.data.data.size = 0;
1326     } else {
1327         type.flags = 0;
1328         type.primitive = sig::pointer_P;
1329         type.data.data.type = internal->type_;
1330         type.data.data.size = 0;
1331     }
1332
1333     return CYMakeType(context, &type);
1334 } CYCatch(NULL) }
1335
1336 static JSValueRef Type_callAsFunction_withName(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1337     if (count != 1)
1338         throw CYJSError(context, "incorrect number of arguments to Type.withName");
1339     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1340
1341     CYPool pool;
1342     const char *name(CYPoolCString(pool, context, arguments[0]));
1343
1344     sig::Type type(*internal->type_);
1345     type.name = name;
1346     return CYMakeType(context, &type);
1347 } CYCatch(NULL) }
1348
1349 static JSValueRef Type_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1350     if (count != 1)
1351         throw CYJSError(context, "incorrect number of arguments to type cast function");
1352     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1353
1354     if (internal->type_->primitive == sig::function_P)
1355         return CYMakeFunctor(context, arguments[0], internal->type_->data.signature);
1356
1357     sig::Type *type(internal->type_);
1358     ffi_type *ffi(internal->GetFFI());
1359     // XXX: alignment?
1360     uint8_t value[ffi->size];
1361     CYPool pool;
1362     CYPoolFFI(&pool, context, type, ffi, value, arguments[0]);
1363     return CYFromFFI(context, type, ffi, value);
1364 } CYCatch(NULL) }
1365
1366 static JSObjectRef Type_callAsConstructor(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1367     if (count != 0)
1368         throw CYJSError(context, "incorrect number of arguments to Type allocator");
1369     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1370
1371     sig::Type *type(internal->type_);
1372     size_t length;
1373
1374     if (type->primitive != sig::array_P)
1375         length = _not(size_t);
1376     else {
1377         length = type->data.data.size;
1378         type = type->data.data.type;
1379     }
1380
1381     void *value(calloc(1, internal->GetFFI()->size));
1382     return CYMakePointer(context, value, length, type, NULL, NULL);
1383 } CYCatch(NULL) }
1384
1385 static JSObjectRef Functor_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1386     if (count != 2)
1387         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1388     CYPool pool;
1389     const char *encoding(CYPoolCString(pool, context, arguments[1]));
1390     sig::Signature signature;
1391     sig::Parse(pool, &signature, encoding, &Structor_);
1392     return CYMakeFunctor(context, arguments[0], signature);
1393 } CYCatch(NULL) }
1394
1395 static JSValueRef CYValue_callAsFunction_valueOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1396     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1397     return CYCastJSValue(context, reinterpret_cast<uintptr_t>(internal->value_));
1398 } CYCatch(NULL) }
1399
1400 static JSValueRef CYValue_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1401     return CYValue_callAsFunction_valueOf(context, object, _this, count, arguments, exception);
1402 }
1403
1404 static JSValueRef CYValue_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1405     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1406     char string[32];
1407     sprintf(string, "%p", internal->value_);
1408     return CYCastJSValue(context, string);
1409 } CYCatch(NULL) }
1410
1411 static JSValueRef Pointer_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1412     std::set<void *> *objects(CYCastObjects(context, _this, count, arguments));
1413
1414     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(_this)));
1415     if (internal->length_ != _not(size_t)) {
1416         JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array_prototype")));
1417         JSObjectRef toCYON(CYCastJSObject(context, CYGetProperty(context, Array, toCYON_s)));
1418         return CYCallAsFunction(context, toCYON, _this, count, arguments);
1419     } else if (internal->type_->type_ == NULL) pointer: {
1420         char string[32];
1421         sprintf(string, "%p", internal->value_);
1422         return CYCastJSValue(context, string);
1423     } try {
1424         JSValueRef value(CYGetProperty(context, _this, cyi_s));
1425         if (JSValueIsUndefined(context, value))
1426             goto pointer;
1427         CYPool pool;
1428         return CYCastJSValue(context, pool.strcat("&", CYPoolCCYON(pool, context, value, objects), NULL));
1429     } catch (const CYException &e) {
1430         goto pointer;
1431     }
1432 } CYCatch(NULL) }
1433
1434 static JSValueRef Pointer_getProperty_type(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1435     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
1436     return CYMakeType(context, internal->type_->type_);
1437 } CYCatch(NULL) }
1438
1439 static JSValueRef Functor_getProperty_type(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1440     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
1441     return CYMakeType(context, &internal->signature_);
1442 } CYCatch(NULL) }
1443
1444 static JSValueRef Type_getProperty_alignment(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1445     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1446     return CYCastJSValue(context, internal->GetFFI()->alignment);
1447 } CYCatch(NULL) }
1448
1449 static JSValueRef Type_getProperty_name(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1450     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1451     return CYCastJSValue(context, internal->type_->name);
1452 } CYCatch(NULL) }
1453
1454 static JSValueRef Type_getProperty_size(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1455     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1456     return CYCastJSValue(context, internal->GetFFI()->size);
1457 } CYCatch(NULL) }
1458
1459 static JSValueRef Type_callAsFunction_toString(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1460     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1461     CYPool pool;
1462     const char *type(sig::Unparse(pool, internal->type_));
1463     return CYCastJSValue(context, CYJSString(type));
1464 } CYCatch(NULL) }
1465
1466 static JSValueRef Type_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1467     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1468     CYLocalPool pool;
1469     std::ostringstream out;
1470     CYOptions options;
1471     CYOutput output(out, options);
1472     (new(pool) CYEncodedType(Decode(pool, internal->type_)))->Output(output, CYNoFlags);
1473     return CYCastJSValue(context, CYJSString(out.str().c_str()));
1474 } CYCatch(NULL) }
1475
1476 static JSValueRef Type_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1477     return Type_callAsFunction_toString(context, object, _this, count, arguments, exception);
1478 }
1479
1480 static JSStaticFunction Pointer_staticFunctions[4] = {
1481     {"toCYON", &Pointer_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1482     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1483     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1484     {NULL, NULL, 0}
1485 };
1486
1487 static JSStaticValue Pointer_staticValues[2] = {
1488     {"type", &Pointer_getProperty_type, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1489     {NULL, NULL, NULL, 0}
1490 };
1491
1492 static JSStaticFunction Struct_staticFunctions[2] = {
1493     {"$cya", &Struct_callAsFunction_$cya, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1494     {NULL, NULL, 0}
1495 };
1496
1497 static JSStaticFunction Functor_staticFunctions[4] = {
1498     {"toCYON", &CYValue_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1499     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1500     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1501     {NULL, NULL, 0}
1502 };
1503
1504 namespace cy {
1505     JSStaticFunction const * const Functor::StaticFunctions = Functor_staticFunctions;
1506 }
1507
1508 static JSStaticValue Functor_staticValues[2] = {
1509     {"type", &Functor_getProperty_type, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1510     {NULL, NULL, NULL, 0}
1511 };
1512
1513 namespace cy {
1514     JSStaticValue const * const Functor::StaticValues = Functor_staticValues;
1515 }
1516
1517 static JSStaticValue Type_staticValues[4] = {
1518     {"alignment", &Type_getProperty_alignment, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1519     {"name", &Type_getProperty_name, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1520     {"size", &Type_getProperty_size, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1521     {NULL, NULL, NULL, 0}
1522 };
1523
1524 static JSStaticFunction Type_staticFunctions[14] = {
1525     {"arrayOf", &Type_callAsFunction_arrayOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1526     {"blockWith", &Type_callAsFunction_blockWith, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1527     {"constant", &Type_callAsFunction_constant, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1528     {"functionWith", &Type_callAsFunction_functionWith, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1529     {"long", &Type_callAsFunction_long, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1530     {"pointerTo", &Type_callAsFunction_pointerTo, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1531     {"short", &Type_callAsFunction_short, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1532     {"signed", &Type_callAsFunction_signed, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1533     {"withName", &Type_callAsFunction_withName, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1534     {"toCYON", &Type_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1535     {"toJSON", &Type_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1536     {"toString", &Type_callAsFunction_toString, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1537     {"unsigned", &Type_callAsFunction_unsigned, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1538     {NULL, NULL, 0}
1539 };
1540
1541 static JSObjectRef (*JSObjectMakeArray$)(JSContextRef, size_t, const JSValueRef[], JSValueRef *);
1542
1543 void CYSetArgs(int argc, const char *argv[]) {
1544     JSContextRef context(CYGetJSContext());
1545     JSValueRef args[argc];
1546     for (int i(0); i != argc; ++i)
1547         args[i] = CYCastJSValue(context, argv[i]);
1548
1549     JSObjectRef array;
1550     if (JSObjectMakeArray$ != NULL)
1551         array = _jsccall(*JSObjectMakeArray$, context, argc, args);
1552     else {
1553         JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array")));
1554         JSValueRef value(CYCallAsFunction(context, Array, NULL, argc, args));
1555         array = CYCastJSObject(context, value);
1556     }
1557
1558     JSObjectRef System(CYGetCachedObject(context, CYJSString("System")));
1559     CYSetProperty(context, System, CYJSString("args"), array);
1560 }
1561
1562 JSObjectRef CYGetGlobalObject(JSContextRef context) {
1563     return JSContextGetGlobalObject(context);
1564 }
1565
1566 // XXX: this is neither exceptin safe nor even terribly sane
1567 class ExecutionHandle {
1568   private:
1569     JSContextRef context_;
1570     std::vector<void *> handles_;
1571
1572   public:
1573     ExecutionHandle(JSContextRef context) :
1574         context_(context)
1575     {
1576         handles_.resize(GetHooks().size());
1577         for (size_t i(0); i != GetHooks().size(); ++i) {
1578             CYHook *hook(GetHooks()[i]);
1579             if (hook->ExecuteStart != NULL)
1580                 handles_[i] = (*hook->ExecuteStart)(context_);
1581             else
1582                 handles_[i] = NULL;
1583         }
1584     }
1585
1586     ~ExecutionHandle() {
1587         for (size_t i(GetHooks().size()); i != 0; --i) {
1588             CYHook *hook(GetHooks()[i-1]);
1589             if (hook->ExecuteEnd != NULL)
1590                 (*hook->ExecuteEnd)(context_, handles_[i-1]);
1591         }
1592     }
1593 };
1594
1595 const char *CYExecute(JSContextRef context, CYPool &pool, CYUTF8String code) {
1596     JSValueRef exception(NULL);
1597
1598     ExecutionHandle handle(context);
1599
1600     JSValueRef result; try {
1601         result = JSEvaluateScript(context, CYJSString(code), NULL, NULL, 0, &exception);
1602     } catch (const char *error) {
1603         return error;
1604     }
1605
1606     if (exception != NULL) error:
1607         return CYPoolCString(pool, context, CYJSString(context, exception));
1608
1609     if (JSValueIsUndefined(context, result))
1610         return NULL;
1611
1612     const char *json; try {
1613         std::set<void *> objects;
1614         json = CYPoolCCYON(pool, context, result, objects, &exception);
1615     } catch (const char *error) {
1616         return error;
1617     }
1618
1619     if (exception != NULL)
1620         goto error;
1621
1622     CYSetProperty(context, CYGetGlobalObject(context), Result_, result);
1623
1624     return json;
1625 }
1626
1627 static bool initialized_ = false;
1628
1629 void CYInitializeDynamic() {
1630     if (!initialized_)
1631         initialized_ = true;
1632     else return;
1633
1634     JSObjectMakeArray$ = reinterpret_cast<JSObjectRef (*)(JSContextRef, size_t, const JSValueRef[], JSValueRef *)>(dlsym(RTLD_DEFAULT, "JSObjectMakeArray"));
1635     JSSynchronousGarbageCollectForDebugging$ = reinterpret_cast<void (*)(JSContextRef)>(dlsym(RTLD_DEFAULT, "JSSynchronousGarbageCollectForDebugging"));
1636
1637     JSClassDefinition definition;
1638
1639     definition = kJSClassDefinitionEmpty;
1640     definition.className = "All";
1641     definition.hasProperty = &All_hasProperty;
1642     definition.getProperty = &All_getProperty;
1643     definition.getPropertyNames = &All_getPropertyNames;
1644     All_ = JSClassCreate(&definition);
1645
1646     definition = kJSClassDefinitionEmpty;
1647     definition.className = "Context";
1648     definition.finalize = &CYFinalize;
1649     Context_ = JSClassCreate(&definition);
1650
1651     definition = kJSClassDefinitionEmpty;
1652     definition.className = "Functor";
1653     definition.staticFunctions = cy::Functor::StaticFunctions;
1654     definition.staticValues = Functor_staticValues;
1655     definition.callAsFunction = &Functor_callAsFunction;
1656     definition.finalize = &CYFinalize;
1657     Functor_ = JSClassCreate(&definition);
1658
1659     definition = kJSClassDefinitionEmpty;
1660     definition.className = "Pointer";
1661     definition.staticFunctions = Pointer_staticFunctions;
1662     definition.staticValues = Pointer_staticValues;
1663     definition.getProperty = &Pointer_getProperty;
1664     definition.setProperty = &Pointer_setProperty;
1665     definition.finalize = &CYFinalize;
1666     Pointer_ = JSClassCreate(&definition);
1667
1668     definition = kJSClassDefinitionEmpty;
1669     definition.className = "Struct";
1670     definition.staticFunctions = Struct_staticFunctions;
1671     definition.getProperty = &Struct_getProperty;
1672     definition.setProperty = &Struct_setProperty;
1673     definition.getPropertyNames = &Struct_getPropertyNames;
1674     definition.finalize = &CYFinalize;
1675     Struct_ = JSClassCreate(&definition);
1676
1677     definition = kJSClassDefinitionEmpty;
1678     definition.className = "Type";
1679     definition.staticValues = Type_staticValues;
1680     definition.staticFunctions = Type_staticFunctions;
1681     definition.callAsFunction = &Type_callAsFunction;
1682     definition.callAsConstructor = &Type_callAsConstructor;
1683     definition.finalize = &CYFinalize;
1684     Type_privateData::Class_ = JSClassCreate(&definition);
1685
1686     definition = kJSClassDefinitionEmpty;
1687     definition.className = "Global";
1688     //definition.getProperty = &Global_getProperty;
1689     Global_ = JSClassCreate(&definition);
1690
1691     Array_s = JSStringCreateWithUTF8CString("Array");
1692     cy_s = JSStringCreateWithUTF8CString("$cy");
1693     cyi_s = JSStringCreateWithUTF8CString("$cyi");
1694     length_s = JSStringCreateWithUTF8CString("length");
1695     message_s = JSStringCreateWithUTF8CString("message");
1696     name_s = JSStringCreateWithUTF8CString("name");
1697     pop_s = JSStringCreateWithUTF8CString("pop");
1698     prototype_s = JSStringCreateWithUTF8CString("prototype");
1699     push_s = JSStringCreateWithUTF8CString("push");
1700     splice_s = JSStringCreateWithUTF8CString("splice");
1701     toCYON_s = JSStringCreateWithUTF8CString("toCYON");
1702     toJSON_s = JSStringCreateWithUTF8CString("toJSON");
1703     toPointer_s = JSStringCreateWithUTF8CString("toPointer");
1704     toString_s = JSStringCreateWithUTF8CString("toString");
1705     weak_s = JSStringCreateWithUTF8CString("weak");
1706
1707     Result_ = JSStringCreateWithUTF8CString("_");
1708
1709     for (CYHook *hook : GetHooks())
1710         if (hook->Initialize != NULL)
1711             (*hook->Initialize)();
1712 }
1713
1714 void CYThrow(JSContextRef context, JSValueRef value) {
1715     if (value != NULL)
1716         throw CYJSError(context, value);
1717 }
1718
1719 const char *CYJSError::PoolCString(CYPool &pool) const {
1720     std::set<void *> objects;
1721     // XXX: this used to be CYPoolCString
1722     return CYPoolCCYON(pool, context_, value_, objects);
1723 }
1724
1725 JSValueRef CYJSError::CastJSValue(JSContextRef context) const {
1726     // XXX: what if the context is different?
1727     return value_;
1728 }
1729
1730 JSValueRef CYCastJSError(JSContextRef context, const char *message) {
1731     JSObjectRef Error(CYGetCachedObject(context, CYJSString("Error")));
1732     JSValueRef arguments[1] = {CYCastJSValue(context, message)};
1733     return _jsccall(JSObjectCallAsConstructor, context, Error, 1, arguments);
1734 }
1735
1736 JSValueRef CYPoolError::CastJSValue(JSContextRef context) const {
1737     return CYCastJSError(context, message_);
1738 }
1739
1740 CYJSError::CYJSError(JSContextRef context, const char *format, ...) {
1741     _assert(context != NULL);
1742
1743     CYPool pool;
1744
1745     va_list args;
1746     va_start(args, format);
1747     // XXX: there might be a beter way to think about this
1748     const char *message(pool.vsprintf(64, format, args));
1749     va_end(args);
1750
1751     value_ = CYCastJSError(context, message);
1752 }
1753
1754 JSGlobalContextRef CYGetJSContext(JSContextRef context) {
1755     return reinterpret_cast<Context *>(JSObjectGetPrivate(CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s))))->context_;
1756 }
1757
1758 extern "C" bool CydgetMemoryParse(const uint16_t **data, size_t *size);
1759
1760 void *CYMapFile(const char *path, size_t *psize) {
1761     int fd(_syscall_(open(path, O_RDONLY), 1, ENOENT));
1762     if (fd == -1)
1763         return NULL;
1764
1765     struct stat stat;
1766     _syscall(fstat(fd, &stat));
1767     size_t size(stat.st_size);
1768
1769     *psize = size;
1770
1771     void *base;
1772     _syscall(base = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0));
1773
1774     _syscall(close(fd));
1775     return base;
1776 }
1777
1778 static JSValueRef require(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1779     _assert(count == 1);
1780     CYPool pool;
1781
1782     Dl_info addr;
1783     _assert(dladdr(reinterpret_cast<void *>(&require), &addr) != 0);
1784     char *lib(pool.strdup(addr.dli_fname));
1785
1786     char *slash(strrchr(lib, '/'));
1787     _assert(slash != NULL);
1788     *slash = '\0';
1789
1790     CYJSString property("exports");
1791     JSObjectRef module;
1792
1793     const char *name(CYPoolCString(pool, context, arguments[0]));
1794     const char *path(pool.strcat(lib, "/cycript0.9/", name, ".cy", NULL));
1795
1796     CYJSString key(path);
1797     JSObjectRef modules(CYGetCachedObject(context, CYJSString("modules")));
1798     JSValueRef cache(CYGetProperty(context, modules, key));
1799
1800     if (!JSValueIsUndefined(context, cache))
1801         module = CYCastJSObject(context, cache);
1802     else {
1803         CYUTF8String code;
1804         code.data = reinterpret_cast<char *>(CYMapFile(path, &code.size));
1805
1806         if (code.data == NULL) {
1807             if (strchr(name, '/') == NULL && (
1808 #ifdef __APPLE__
1809                 dlopen(pool.strcat("/System/Library/Frameworks/", name, ".framework/", name, NULL), RTLD_LAZY | RTLD_GLOBAL) != NULL ||
1810                 dlopen(pool.strcat("/System/Library/PrivateFrameworks/", name, ".framework/", name, NULL), RTLD_LAZY | RTLD_GLOBAL) != NULL ||
1811 #endif
1812             false))
1813                 return CYJSUndefined(NULL);
1814
1815             CYThrow("Can't find module: %s", name);
1816         }
1817
1818         module = JSObjectMake(context, NULL, NULL);
1819         CYSetProperty(context, modules, key, module);
1820
1821         JSObjectRef exports(JSObjectMake(context, NULL, NULL));
1822         CYSetProperty(context, module, property, exports);
1823
1824         std::stringstream wrap;
1825         wrap << "(function (exports, require, module) { " << code << "\n});";
1826         code = CYPoolCode(pool, wrap);
1827
1828         JSValueRef value(_jsccall(JSEvaluateScript, context, CYJSString(code), NULL, NULL, 0));
1829         JSObjectRef function(CYCastJSObject(context, value));
1830
1831         JSValueRef arguments[3] = { exports, JSObjectMakeFunctionWithCallback(context, CYJSString("require"), &require), module };
1832         CYCallAsFunction(context, function, NULL, 3, arguments);
1833     }
1834
1835     return CYGetProperty(context, module, property);
1836 } CYCatch(NULL) }
1837
1838 extern "C" void CYSetupContext(JSGlobalContextRef context) {
1839     CYInitializeDynamic();
1840
1841     JSObjectRef global(CYGetGlobalObject(context));
1842
1843     JSObjectRef cy(JSObjectMake(context, Context_, new Context(context)));
1844     CYSetProperty(context, global, cy_s, cy, kJSPropertyAttributeDontEnum);
1845
1846 /* Cache Globals {{{ */
1847     JSObjectRef Array(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Array"))));
1848     CYSetProperty(context, cy, CYJSString("Array"), Array);
1849
1850     JSObjectRef Array_prototype(CYCastJSObject(context, CYGetProperty(context, Array, prototype_s)));
1851     CYSetProperty(context, cy, CYJSString("Array_prototype"), Array_prototype);
1852
1853     JSObjectRef Boolean(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Boolean"))));
1854     CYSetProperty(context, cy, CYJSString("Boolean"), Boolean);
1855
1856     JSObjectRef Boolean_prototype(CYCastJSObject(context, CYGetProperty(context, Boolean, prototype_s)));
1857     CYSetProperty(context, cy, CYJSString("Boolean_prototype"), Boolean_prototype);
1858
1859     JSObjectRef Error(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Error"))));
1860     CYSetProperty(context, cy, CYJSString("Error"), Error);
1861
1862     JSObjectRef Function(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Function"))));
1863     CYSetProperty(context, cy, CYJSString("Function"), Function);
1864
1865     JSObjectRef Function_prototype(CYCastJSObject(context, CYGetProperty(context, Function, prototype_s)));
1866     CYSetProperty(context, cy, CYJSString("Function_prototype"), Function_prototype);
1867
1868     JSObjectRef Number(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Number"))));
1869     CYSetProperty(context, cy, CYJSString("Number"), Number);
1870
1871     JSObjectRef Number_prototype(CYCastJSObject(context, CYGetProperty(context, Number, prototype_s)));
1872     CYSetProperty(context, cy, CYJSString("Number_prototype"), Number_prototype);
1873
1874     JSObjectRef Object(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Object"))));
1875     CYSetProperty(context, cy, CYJSString("Object"), Object);
1876
1877     JSObjectRef Object_prototype(CYCastJSObject(context, CYGetProperty(context, Object, prototype_s)));
1878     CYSetProperty(context, cy, CYJSString("Object_prototype"), Object_prototype);
1879
1880     JSObjectRef String(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("String"))));
1881     CYSetProperty(context, cy, CYJSString("String"), String);
1882
1883     JSObjectRef String_prototype(CYCastJSObject(context, CYGetProperty(context, String, prototype_s)));
1884     CYSetProperty(context, cy, CYJSString("String_prototype"), String_prototype);
1885 /* }}} */
1886
1887     CYSetProperty(context, Array_prototype, toCYON_s, &Array_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1888     CYSetProperty(context, String_prototype, toCYON_s, &String_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1889
1890     JSObjectRef cycript(JSObjectMake(context, NULL, NULL));
1891     CYSetProperty(context, global, CYJSString("Cycript"), cycript);
1892     CYSetProperty(context, cycript, CYJSString("gc"), &Cycript_gc_callAsFunction);
1893
1894     JSObjectRef Functor(JSObjectMakeConstructor(context, Functor_, &Functor_new));
1895     CYSetPrototype(context, CYCastJSObject(context, CYGetProperty(context, Functor, prototype_s)), Function_prototype);
1896     CYSetProperty(context, cycript, CYJSString("Functor"), Functor);
1897
1898     CYSetProperty(context, cycript, CYJSString("Pointer"), JSObjectMakeConstructor(context, Pointer_, &Pointer_new));
1899     CYSetProperty(context, cycript, CYJSString("Type"), JSObjectMakeConstructor(context, Type_privateData::Class_, &Type_new));
1900
1901     JSObjectRef modules(JSObjectMake(context, NULL, NULL));
1902     CYSetProperty(context, cy, CYJSString("modules"), modules);
1903
1904     JSObjectRef all(JSObjectMake(context, All_, NULL));
1905     CYSetProperty(context, cycript, CYJSString("all"), all);
1906
1907     JSObjectRef alls(_jsccall(JSObjectCallAsConstructor, context, Array, 0, NULL));
1908     CYSetProperty(context, cycript, CYJSString("alls"), alls);
1909
1910     if (true) {
1911         JSObjectRef last(NULL), curr(global);
1912
1913         goto next; for (JSValueRef next;;) {
1914             if (JSValueIsNull(context, next))
1915                 break;
1916             last = curr;
1917             curr = CYCastJSObject(context, next);
1918           next:
1919             next = JSObjectGetPrototype(context, curr);
1920         }
1921
1922         CYSetPrototype(context, last, all);
1923     }
1924
1925     CYSetProperty(context, global, CYJSString("$cyq"), &$cyq, kJSPropertyAttributeDontEnum);
1926
1927     JSObjectRef System(JSObjectMake(context, NULL, NULL));
1928     CYSetProperty(context, cy, CYJSString("System"), System);
1929
1930     CYSetProperty(context, all, CYJSString("require"), &require, kJSPropertyAttributeDontEnum);
1931
1932     CYSetProperty(context, global, CYJSString("system"), System);
1933     CYSetProperty(context, System, CYJSString("args"), CYJSNull(context));
1934     //CYSetProperty(context, System, CYJSString("global"), global);
1935     CYSetProperty(context, System, CYJSString("print"), &System_print);
1936
1937 #ifdef __APPLE__
1938     if (&JSWeakObjectMapCreate != NULL) {
1939         JSWeakObjectMapRef weak(JSWeakObjectMapCreate(context, NULL, NULL));
1940         CYSetProperty(context, cy, weak_s, CYCastJSValue(context, reinterpret_cast<uintptr_t>(weak)));
1941     }
1942 #endif
1943
1944     if (CYBridgeEntry *entry = CYBridgeHash("1dlerror", 8))
1945         entry->cache_ = new cy::Functor(entry->value_, reinterpret_cast<void (*)()>(&dlerror));
1946
1947     for (CYHook *hook : GetHooks())
1948         if (hook->SetupContext != NULL)
1949             (*hook->SetupContext)(context);
1950
1951     CYArrayPush(context, alls, cycript);
1952 }
1953
1954 static JSGlobalContextRef context_;
1955
1956 JSGlobalContextRef CYGetJSContext() {
1957     CYInitializeDynamic();
1958
1959     if (context_ == NULL) {
1960         context_ = JSGlobalContextCreate(Global_);
1961         CYSetupContext(context_);
1962     }
1963
1964     return context_;
1965 }
1966
1967 void CYDestroyContext() {
1968     if (context_ == NULL)
1969         return;
1970     JSGlobalContextRelease(context_);
1971     context_ = NULL;
1972 }