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
 158 static JSStringRef Result_;
 159
 160 void CYFinalize(JSObjectRef object) {
 161     CYData *internal(reinterpret_cast<CYData *>(JSObjectGetPrivate(object)));
 162     _assert(internal->count_ != _not(unsigned));
 163     if (--internal->count_ == 0)
 164         delete internal;
 165 }
 166
 167 void Structor_(CYPool &pool, sig::Type *&type) {
 168     if (
 169         type->primitive == sig::pointer_P &&
 170         type->data.data.type->primitive == sig::struct_P &&
 171         type->data.data.type->name != NULL &&
 172         strcmp(type->data.data.type->name, "_objc_class") == 0
 173     ) {
 174         type->primitive = sig::typename_P;
 175         type->data.data.type = NULL;
 176         return;
 177     }
 178
 179     if (type->primitive != sig::struct_P || type->name == NULL)
 180         return;
 181
 182     size_t length(strlen(type->name));
 183     char keyed[length + 2];
 184     memcpy(keyed + 1, type->name, length + 1);
 185
 186     static const char *modes = "34";
 187     for (size_t i(0); i != 2; ++i) {
 188         char mode(modes[i]);
 189         keyed[0] = mode;
 190
 191         if (CYBridgeEntry *entry = CYBridgeHash(keyed, length + 1))
 192             switch (mode) {
 193                 case '3':
 194                     sig::Parse(pool, &type->data.signature, entry->value_, &Structor_);
 195                 break;
 196
 197                 case '4': {
 198                     sig::Signature signature;
 199                     sig::Parse(pool, &signature, entry->value_, &Structor_);
 200                     type = signature.elements[0].type;
 201                 } break;
 202             }
 203     }
 204 }
 205
 206 JSClassRef Type_privateData::Class_;
 207
 208 struct Context :
 209     CYData
 210 {
 211     JSGlobalContextRef context_;
 212
 213     Context(JSGlobalContextRef context) :
 214         context_(context)
 215     {
 216     }
 217 };
 218
 219 struct Pointer :
 220     CYOwned
 221 {
 222     Type_privateData *type_;
 223     size_t length_;
 224
 225     Pointer(void *value, JSContextRef context, JSObjectRef owner, size_t length, sig::Type *type) :
 226         CYOwned(value, context, owner),
 227         type_(new(*pool_) Type_privateData(type)),
 228         length_(length)
 229     {
 230     }
 231 };
 232
 233 struct Struct_privateData :
 234     CYOwned
 235 {
 236     Type_privateData *type_;
 237
 238     Struct_privateData(JSContextRef context, JSObjectRef owner) :
 239         CYOwned(NULL, context, owner)
 240     {
 241     }
 242 };
 243
 244 typedef std::map<const char *, Type_privateData *, CYCStringLess> TypeMap;
 245 static TypeMap Types_;
 246
 247 JSObjectRef CYMakeStruct(JSContextRef context, void *data, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 248     Struct_privateData *internal(new Struct_privateData(context, owner));
 249     CYPool &pool(*internal->pool_);
 250     Type_privateData *typical(new(pool) Type_privateData(type, ffi));
 251     internal->type_ = typical;
 252
 253     if (owner != NULL)
 254         internal->value_ = data;
 255     else {
 256         size_t size(typical->GetFFI()->size);
 257         void *copy(internal->pool_->malloc<void>(size));
 258         memcpy(copy, data, size);
 259         internal->value_ = copy;
 260     }
 261
 262     return JSObjectMake(context, Struct_, internal);
 263 }
 264
 265 static void *CYCastSymbol(const char *name) {
 266     return dlsym(RTLD_DEFAULT, name);
 267 }
 268
 269 JSValueRef CYCastJSValue(JSContextRef context, bool value) {
 270     return JSValueMakeBoolean(context, value);
 271 }
 272
 273 JSValueRef CYCastJSValue(JSContextRef context, double value) {
 274     return JSValueMakeNumber(context, value);
 275 }
 276
 277 #define CYCastJSValue_(Type_) \
 278     JSValueRef CYCastJSValue(JSContextRef context, Type_ value) { \
 279         return JSValueMakeNumber(context, static_cast<double>(value)); \
 280     }
 281
 282 CYCastJSValue_(int)
 283 CYCastJSValue_(unsigned int)
 284 CYCastJSValue_(long int)
 285 CYCastJSValue_(long unsigned int)
 286 CYCastJSValue_(long long int)
 287 CYCastJSValue_(long long unsigned int)
 288
 289 JSValueRef CYJSUndefined(JSContextRef context) {
 290     return JSValueMakeUndefined(context);
 291 }
 292
 293 double CYCastDouble(JSContextRef context, JSValueRef value) {
 294     return _jsccall(JSValueToNumber, context, value);
 295 }
 296
 297 bool CYCastBool(JSContextRef context, JSValueRef value) {
 298     return JSValueToBoolean(context, value);
 299 }
 300
 301 JSValueRef CYJSNull(JSContextRef context) {
 302     return JSValueMakeNull(context);
 303 }
 304
 305 JSValueRef CYCastJSValue(JSContextRef context, JSStringRef value) {
 306     return value == NULL ? CYJSNull(context) : JSValueMakeString(context, value);
 307 }
 308
 309 JSValueRef CYCastJSValue(JSContextRef context, const char *value) {
 310     return CYCastJSValue(context, CYJSString(value));
 311 }
 312
 313 JSObjectRef CYCastJSObject(JSContextRef context, JSValueRef value) {
 314     return _jsccall(JSValueToObject, context, value);
 315 }
 316
 317 JSValueRef CYCallAsFunction(JSContextRef context, JSObjectRef function, JSObjectRef _this, size_t count, const JSValueRef arguments[]) {
 318     return _jsccall(JSObjectCallAsFunction, context, function, _this, count, arguments);
 319 }
 320
 321 bool CYIsCallable(JSContextRef context, JSValueRef value) {
 322     return value != NULL && JSValueIsObject(context, value) && JSObjectIsFunction(context, (JSObjectRef) value);
 323 }
 324
 325 bool CYIsEqual(JSContextRef context, JSValueRef lhs, JSValueRef rhs) {
 326     return _jsccall(JSValueIsEqual, context, lhs, rhs);
 327 }
 328
 329 bool CYIsStrictEqual(JSContextRef context, JSValueRef lhs, JSValueRef rhs) {
 330     return JSValueIsStrictEqual(context, lhs, rhs);
 331 }
 332
 333 size_t CYArrayLength(JSContextRef context, JSObjectRef array) {
 334     return CYCastDouble(context, CYGetProperty(context, array, length_s));
 335 }
 336
 337 JSValueRef CYArrayGet(JSContextRef context, JSObjectRef array, size_t index) {
 338     return _jsccall(JSObjectGetPropertyAtIndex, context, array, index);
 339 }
 340
 341 void CYArrayPush(JSContextRef context, JSObjectRef array, JSValueRef value) {
 342     JSValueRef arguments[1];
 343     arguments[0] = value;
 344     JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array_prototype")));
 345     _jsccall(JSObjectCallAsFunction, context, CYCastJSObject(context, CYGetProperty(context, Array, push_s)), array, 1, arguments);
 346 }
 347
 348 static JSValueRef System_print(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 349     if (count == 0)
 350         printf("\n");
 351     else {
 352         CYPool pool;
 353         printf("%s\n", CYPoolCString(pool, context, arguments[0]));
 354     }
 355
 356     return CYJSUndefined(context);
 357 } CYCatch(NULL) }
 358
 359 static size_t Nonce_(0);
 360
 361 static JSValueRef $cyq(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 362     CYPool pool;
 363     const char *name(pool.strcat(CYPoolCString(pool, context, arguments[0]), pool.itoa(Nonce_++), NULL));
 364     return CYCastJSValue(context, name);
 365 } CYCatch(NULL) }
 366
 367 static void (*JSSynchronousGarbageCollectForDebugging$)(JSContextRef);
 368
 369 void CYGarbageCollect(JSContextRef context) {
 370     (JSSynchronousGarbageCollectForDebugging$ ?: &JSGarbageCollect)(context);
 371 }
 372
 373 static JSValueRef Cycript_gc_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 374     CYGarbageCollect(context);
 375     return CYJSUndefined(context);
 376 } CYCatch(NULL) }
 377
 378 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSValueRef value, std::set<void *> &objects, JSValueRef *exception) { CYTry {
 379     switch (JSType type = JSValueGetType(context, value)) {
 380         case kJSTypeUndefined:
 381             return "undefined";
 382         case kJSTypeNull:
 383             return "null";
 384         case kJSTypeBoolean:
 385             return CYCastBool(context, value) ? "true" : "false";
 386
 387         case kJSTypeNumber: {
 388             std::ostringstream str;
 389             CYNumerify(str, CYCastDouble(context, value));
 390             std::string value(str.str());
 391             return pool.strmemdup(value.c_str(), value.size());
 392         } break;
 393
 394         case kJSTypeString: {
 395             std::ostringstream str;
 396             CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, value)));
 397             CYStringify(str, string.data, string.size);
 398             std::string value(str.str());
 399             return pool.strmemdup(value.c_str(), value.size());
 400         } break;
 401
 402         case kJSTypeObject:
 403             return CYPoolCCYON(pool, context, (JSObjectRef) value, objects);
 404         default:
 405             throw CYJSError(context, "JSValueGetType() == 0x%x", type);
 406     }
 407 } CYCatch(NULL) }
 408
 409 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSValueRef value, std::set<void *> &objects) {
 410     return _jsccall(CYPoolCCYON, pool, context, value, objects);
 411 }
 412
 413 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSValueRef value, std::set<void *> *objects) {
 414     if (objects != NULL)
 415         return CYPoolCCYON(pool, context, value, *objects);
 416     else {
 417         std::set<void *> objects;
 418         return CYPoolCCYON(pool, context, value, objects);
 419     }
 420 }
 421
 422 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSObjectRef object, std::set<void *> &objects) {
 423     JSValueRef toCYON(CYGetProperty(context, object, toCYON_s));
 424     if (CYIsCallable(context, toCYON)) {
 425         // XXX: this needs to be abstracted behind some kind of function
 426         JSValueRef arguments[1] = {CYCastJSValue(context, static_cast<double>(reinterpret_cast<uintptr_t>(&objects)))};
 427         JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toCYON, object, 1, arguments));
 428         _assert(value != NULL);
 429         return CYPoolCString(pool, context, value);
 430     }
 431
 432     JSValueRef toJSON(CYGetProperty(context, object, toJSON_s));
 433     if (CYIsCallable(context, toJSON)) {
 434         JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 435         return _jsccall(CYPoolCCYON, pool, context, CYCallAsFunction(context, (JSObjectRef) toJSON, object, 1, arguments), objects);
 436     }
 437
 438     if (JSObjectIsFunction(context, object)) {
 439         JSValueRef toString(CYGetProperty(context, object, toString_s));
 440         if (CYIsCallable(context, toString)) {
 441             JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 442             JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toString, object, 1, arguments));
 443             _assert(value != NULL);
 444             return CYPoolCString(pool, context, value);
 445         }
 446     }
 447
 448     _assert(objects.insert(object).second);
 449
 450     std::ostringstream str;
 451
 452     str << '{';
 453
 454     // XXX: this is, sadly, going to leak
 455     JSPropertyNameArrayRef names(JSObjectCopyPropertyNames(context, object));
 456
 457     bool comma(false);
 458
 459     for (size_t index(0), count(JSPropertyNameArrayGetCount(names)); index != count; ++index) {
 460         if (comma)
 461             str << ',';
 462         else
 463             comma = true;
 464
 465         JSStringRef name(JSPropertyNameArrayGetNameAtIndex(names, index));
 466         CYUTF8String string(CYPoolUTF8String(pool, context, name));
 467
 468         if (CYIsKey(string))
 469             str << string.data;
 470         else
 471             CYStringify(str, string.data, string.size);
 472
 473         str << ':';
 474
 475         try {
 476             JSValueRef value(CYGetProperty(context, object, name));
 477             str << CYPoolCCYON(pool, context, value, objects);
 478         } catch (const CYException &error) {
 479             str << "@error";
 480         }
 481     }
 482
 483     JSPropertyNameArrayRelease(names);
 484
 485     str << '}';
 486
 487     std::string string(str.str());
 488     return pool.strmemdup(string.c_str(), string.size());
 489 }
 490
 491 std::set<void *> *CYCastObjects(JSContextRef context, JSObjectRef _this, size_t count, const JSValueRef arguments[]) {
 492     if (count == 0)
 493         return NULL;
 494     return CYCastPointer<std::set<void *> *>(context, arguments[0]);
 495 }
 496
 497 static JSValueRef Array_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 498     std::set<void *> *objects(CYCastObjects(context, _this, count, arguments));
 499     // XXX: this is horribly inefficient
 500     std::set<void *> backup;
 501     if (objects == NULL)
 502         objects = &backup;
 503
 504     CYPool pool;
 505     std::ostringstream str;
 506
 507     str << '[';
 508
 509     JSValueRef length(CYGetProperty(context, _this, length_s));
 510     bool comma(false);
 511
 512     for (size_t index(0), count(CYCastDouble(context, length)); index != count; ++index) {
 513         if (comma)
 514             str << ',';
 515         else
 516             comma = true;
 517
 518         try {
 519             JSValueRef value(CYGetProperty(context, _this, index));
 520             if (!JSValueIsUndefined(context, value))
 521                 str << CYPoolCCYON(pool, context, value, *objects);
 522             else {
 523                 str << ',';
 524                 comma = false;
 525             }
 526         } catch (const CYException &error) {
 527             str << "@error";
 528         }
 529     }
 530
 531     str << ']';
 532
 533     std::string value(str.str());
 534     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 535 } CYCatch(NULL) }
 536
 537 static JSValueRef String_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 538     CYPool pool;
 539     std::ostringstream str;
 540
 541     CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, _this)));
 542     CYStringify(str, string.data, string.size);
 543
 544     std::string value(str.str());
 545     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 546 } CYCatch(NULL) }
 547
 548 JSObjectRef CYMakePointer(JSContextRef context, void *pointer, size_t length, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 549     Pointer *internal(new Pointer(pointer, context, owner, length, type));
 550     return JSObjectMake(context, Pointer_, internal);
 551 }
 552
 553 static JSObjectRef CYMakeFunctor(JSContextRef context, void (*function)(), const sig::Signature &signature) {
 554     return JSObjectMake(context, Functor_, new cy::Functor(signature, function));
 555 }
 556
 557 static JSObjectRef CYMakeFunctor(JSContextRef context, const char *symbol, const char *encoding, void **cache) {
 558     cy::Functor *internal;
 559     if (*cache != NULL)
 560         internal = reinterpret_cast<cy::Functor *>(*cache);
 561     else {
 562         void (*function)()(reinterpret_cast<void (*)()>(CYCastSymbol(symbol)));
 563         if (function == NULL)
 564             return NULL;
 565
 566         internal = new cy::Functor(encoding, function);
 567         *cache = internal;
 568     }
 569
 570     ++internal->count_;
 571     return JSObjectMake(context, Functor_, internal);
 572 }
 573
 574 static bool CYGetOffset(CYPool &pool, JSContextRef context, JSStringRef value, ssize_t &index) {
 575     return CYGetOffset(CYPoolCString(pool, context, value), index);
 576 }
 577
 578 void *CYCastPointer_(JSContextRef context, JSValueRef value) {
 579     switch (JSValueGetType(context, value)) {
 580         case kJSTypeNull:
 581             return NULL;
 582         case kJSTypeObject: {
 583             JSObjectRef object((JSObjectRef) value);
 584             if (JSValueIsObjectOfClass(context, value, Pointer_)) {
 585                 Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 586                 return internal->value_;
 587             }
 588             JSValueRef toPointer(CYGetProperty(context, object, toPointer_s));
 589             if (CYIsCallable(context, toPointer)) {
 590                 JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toPointer, object, 0, NULL));
 591                 _assert(value != NULL);
 592                 return CYCastPointer_(context, value);
 593             }
 594         } default:
 595             double number(CYCastDouble(context, value));
 596             if (std::isnan(number))
 597                 throw CYJSError(context, "cannot convert value to pointer");
 598             return reinterpret_cast<void *>(static_cast<uintptr_t>(static_cast<long long>(number)));
 599     }
 600 }
 601
 602 void CYPoolFFI(CYPool *pool, JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, JSValueRef value) {
 603     switch (type->primitive) {
 604         case sig::boolean_P:
 605             *reinterpret_cast<bool *>(data) = JSValueToBoolean(context, value);
 606         break;
 607
 608 #define CYPoolFFI_(primitive, native) \
 609         case sig::primitive ## _P: \
 610             *reinterpret_cast<native *>(data) = CYCastDouble(context, value); \
 611         break;
 612
 613         CYPoolFFI_(uchar, unsigned char)
 614         CYPoolFFI_(char, char)
 615         CYPoolFFI_(ushort, unsigned short)
 616         CYPoolFFI_(short, short)
 617         CYPoolFFI_(ulong, unsigned long)
 618         CYPoolFFI_(long, long)
 619         CYPoolFFI_(uint, unsigned int)
 620         CYPoolFFI_(int, int)
 621         CYPoolFFI_(ulonglong, unsigned long long)
 622         CYPoolFFI_(longlong, long long)
 623         CYPoolFFI_(float, float)
 624         CYPoolFFI_(double, double)
 625
 626         case sig::array_P: {
 627             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 628             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 629             for (size_t index(0); index != type->data.data.size; ++index) {
 630                 ffi_type *field(ffi->elements[index]);
 631
 632                 JSValueRef rhs;
 633                 if (aggregate == NULL)
 634                     rhs = value;
 635                 else {
 636                     rhs = CYGetProperty(context, aggregate, index);
 637                     if (JSValueIsUndefined(context, rhs))
 638                         throw CYJSError(context, "unable to extract array value");
 639                 }
 640
 641                 CYPoolFFI(pool, context, type->data.data.type, field, base, rhs);
 642                 // XXX: alignment?
 643                 base += field->size;
 644             }
 645         } break;
 646
 647         case sig::pointer_P:
 648             *reinterpret_cast<void **>(data) = CYCastPointer<void *>(context, value);
 649         break;
 650
 651         case sig::string_P:
 652             _assert(pool != NULL);
 653             *reinterpret_cast<const char **>(data) = CYPoolCString(*pool, context, value);
 654         break;
 655
 656         case sig::struct_P: {
 657             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 658             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 659             for (size_t index(0); index != type->data.signature.count; ++index) {
 660                 sig::Element *element(&type->data.signature.elements[index]);
 661                 ffi_type *field(ffi->elements[index]);
 662
 663                 JSValueRef rhs;
 664                 if (aggregate == NULL)
 665                     rhs = value;
 666                 else {
 667                     rhs = CYGetProperty(context, aggregate, index);
 668                     if (JSValueIsUndefined(context, rhs)) {
 669                         if (element->name != NULL)
 670                             rhs = CYGetProperty(context, aggregate, CYJSString(element->name));
 671                         else
 672                             goto undefined;
 673                         if (JSValueIsUndefined(context, rhs)) undefined:
 674                             throw CYJSError(context, "unable to extract structure value");
 675                     }
 676                 }
 677
 678                 CYPoolFFI(pool, context, element->type, field, base, rhs);
 679                 // XXX: alignment?
 680                 base += field->size;
 681             }
 682         } break;
 683
 684         case sig::void_P:
 685         break;
 686
 687         default:
 688             for (CYHook *hook : GetHooks())
 689                 if (hook->PoolFFI != NULL)
 690                     if ((*hook->PoolFFI)(pool, context, type, ffi, data, value))
 691                         return;
 692
 693             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 694     }
 695 }
 696
 697 JSValueRef CYFromFFI(JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, bool initialize, JSObjectRef owner) {
 698     switch (type->primitive) {
 699         case sig::boolean_P:
 700             return CYCastJSValue(context, *reinterpret_cast<bool *>(data));
 701
 702 #define CYFromFFI_(primitive, native) \
 703         case sig::primitive ## _P: \
 704             return CYCastJSValue(context, *reinterpret_cast<native *>(data)); \
 705
 706         CYFromFFI_(uchar, unsigned char)
 707         CYFromFFI_(char, char)
 708         CYFromFFI_(ushort, unsigned short)
 709         CYFromFFI_(short, short)
 710         CYFromFFI_(ulong, unsigned long)
 711         CYFromFFI_(long, long)
 712         CYFromFFI_(uint, unsigned int)
 713         CYFromFFI_(int, int)
 714         CYFromFFI_(ulonglong, unsigned long long)
 715         CYFromFFI_(longlong, long long)
 716         CYFromFFI_(float, float)
 717         CYFromFFI_(double, double)
 718
 719         case sig::array_P:
 720             if (void *pointer = data)
 721                 return CYMakePointer(context, pointer, type->data.data.size, type->data.data.type, NULL, owner);
 722             else goto null;
 723
 724         case sig::pointer_P:
 725             if (void *pointer = *reinterpret_cast<void **>(data))
 726                 return CYMakePointer(context, pointer, _not(size_t), type->data.data.type, NULL, owner);
 727             else goto null;
 728
 729         case sig::string_P:
 730             if (char *utf8 = *reinterpret_cast<char **>(data))
 731                 return CYCastJSValue(context, utf8);
 732             else goto null;
 733
 734         case sig::struct_P:
 735             return CYMakeStruct(context, data, type, ffi, owner);
 736         case sig::void_P:
 737             return CYJSUndefined(context);
 738
 739         null:
 740             return CYJSNull(context);
 741         default:
 742             for (CYHook *hook : GetHooks())
 743                 if (hook->FromFFI != NULL)
 744                     if (JSValueRef value = (*hook->FromFFI)(context, type, ffi, data, initialize, owner))
 745                         return value;
 746
 747             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 748     }
 749 }
 750
 751 void CYExecuteClosure(ffi_cif *cif, void *result, void **arguments, void *arg, JSValueRef (*adapter)(JSContextRef, size_t, JSValueRef[], JSObjectRef)) {
 752     Closure_privateData *internal(reinterpret_cast<Closure_privateData *>(arg));
 753
 754     JSContextRef context(internal->context_);
 755
 756     size_t count(internal->cif_.nargs);
 757     JSValueRef values[count];
 758
 759     for (size_t index(0); index != count; ++index)
 760         values[index] = CYFromFFI(context, internal->signature_.elements[1 + index].type, internal->cif_.arg_types[index], arguments[index]);
 761
 762     JSValueRef value(adapter(context, count, values, internal->function_));
 763     CYPoolFFI(NULL, context, internal->signature_.elements[0].type, internal->cif_.rtype, result, value);
 764 }
 765
 766 static JSValueRef FunctionAdapter_(JSContextRef context, size_t count, JSValueRef values[], JSObjectRef function) {
 767     return CYCallAsFunction(context, function, NULL, count, values);
 768 }
 769
 770 static void FunctionClosure_(ffi_cif *cif, void *result, void **arguments, void *arg) {
 771     CYExecuteClosure(cif, result, arguments, arg, &FunctionAdapter_);
 772 }
 773
 774 Closure_privateData *CYMakeFunctor_(JSContextRef context, JSObjectRef function, const sig::Signature &signature, void (*callback)(ffi_cif *, void *, void **, void *)) {
 775     // XXX: in case of exceptions this will leak
 776     // XXX: in point of fact, this may /need/ to leak :(
 777     Closure_privateData *internal(new Closure_privateData(context, function, signature));
 778
 779 #if defined(__APPLE__) && (defined(__arm__) || defined(__arm64__))
 780     void *executable;
 781     ffi_closure *writable(reinterpret_cast<ffi_closure *>(ffi_closure_alloc(sizeof(ffi_closure), &executable)));
 782
 783     ffi_status status(ffi_prep_closure_loc(writable, &internal->cif_, callback, internal, executable));
 784     _assert(status == FFI_OK);
 785
 786     internal->value_ = executable;
 787 #else
 788     ffi_closure *closure((ffi_closure *) _syscall(mmap(
 789         NULL, sizeof(ffi_closure),
 790         PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE,
 791         -1, 0
 792     )));
 793
 794     ffi_status status(ffi_prep_closure(closure, &internal->cif_, callback, internal));
 795     _assert(status == FFI_OK);
 796
 797     _syscall(mprotect(closure, sizeof(*closure), PROT_READ | PROT_EXEC));
 798
 799     internal->value_ = closure;
 800 #endif
 801
 802     return internal;
 803 }
 804
 805 static JSObjectRef CYMakeFunctor(JSContextRef context, JSObjectRef function, const sig::Signature &signature) {
 806     Closure_privateData *internal(CYMakeFunctor_(context, function, signature, &FunctionClosure_));
 807     JSObjectRef object(JSObjectMake(context, Functor_, internal));
 808     // XXX: see above notes about needing to leak
 809     JSValueProtect(CYGetJSContext(context), object);
 810     return object;
 811 }
 812
 813 JSObjectRef CYGetCachedObject(JSContextRef context, JSStringRef name) {
 814     return CYCastJSObject(context, CYGetProperty(context, CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s)), name));
 815 }
 816
 817 static JSObjectRef CYMakeFunctor(JSContextRef context, JSValueRef value, const sig::Signature &signature) {
 818     JSObjectRef Function(CYGetCachedObject(context, CYJSString("Function")));
 819
 820     bool function(_jsccall(JSValueIsInstanceOfConstructor, context, value, Function));
 821     if (function) {
 822         JSObjectRef function(CYCastJSObject(context, value));
 823         return CYMakeFunctor(context, function, signature);
 824     } else {
 825         void (*function)()(CYCastPointer<void (*)()>(context, value));
 826         return CYMakeFunctor(context, function, signature);
 827     }
 828 }
 829
 830 static bool Index_(CYPool &pool, JSContextRef context, Struct_privateData *internal, JSStringRef property, ssize_t &index, uint8_t *&base) {
 831     Type_privateData *typical(internal->type_);
 832     sig::Type *type(typical->type_);
 833     if (type == NULL)
 834         return false;
 835
 836     const char *name(CYPoolCString(pool, context, property));
 837     size_t length(strlen(name));
 838     double number(CYCastDouble(name, length));
 839
 840     size_t count(type->data.signature.count);
 841
 842     if (std::isnan(number)) {
 843         if (property == NULL)
 844             return false;
 845
 846         sig::Element *elements(type->data.signature.elements);
 847
 848         for (size_t local(0); local != count; ++local) {
 849             sig::Element *element(&elements[local]);
 850             if (element->name != NULL && strcmp(name, element->name) == 0) {
 851                 index = local;
 852                 goto base;
 853             }
 854         }
 855
 856         return false;
 857     } else {
 858         index = static_cast<ssize_t>(number);
 859         if (index != number || index < 0 || static_cast<size_t>(index) >= count)
 860             return false;
 861     }
 862
 863   base:
 864     ffi_type **elements(typical->GetFFI()->elements);
 865
 866     base = reinterpret_cast<uint8_t *>(internal->value_);
 867     for (ssize_t local(0); local != index; ++local)
 868         base += elements[local]->size;
 869
 870     return true;
 871 }
 872
 873 static JSValueRef Pointer_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 874     CYPool pool;
 875     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 876
 877     if (JSStringIsEqual(property, length_s))
 878         return internal->length_ == _not(size_t) ? CYJSUndefined(context) : CYCastJSValue(context, internal->length_);
 879
 880     Type_privateData *typical(internal->type_);
 881     if (typical->type_ == NULL)
 882         return NULL;
 883     sig::Type &type(*typical->type_);
 884
 885     ssize_t offset;
 886     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 887         offset = 0;
 888     else if (!CYGetOffset(pool, context, property, offset))
 889         return NULL;
 890
 891     if (type.primitive == sig::function_P)
 892         return CYMakeFunctor(context, reinterpret_cast<void (*)()>(internal->value_), type.data.signature);
 893
 894     ffi_type *ffi(typical->GetFFI());
 895
 896     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 897     base += ffi->size * offset;
 898
 899     JSObjectRef owner(internal->GetOwner() ?: object);
 900     return CYFromFFI(context, &type, ffi, base, false, owner);
 901 } CYCatch(NULL) }
 902
 903 static bool Pointer_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 904     CYPool pool;
 905     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 906     Type_privateData *typical(internal->type_);
 907
 908     if (typical->type_ == NULL)
 909         return false;
 910
 911     ssize_t offset;
 912     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 913         offset = 0;
 914     else if (!CYGetOffset(pool, context, property, offset))
 915         return false;
 916
 917     ffi_type *ffi(typical->GetFFI());
 918
 919     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 920     base += ffi->size * offset;
 921
 922     CYPoolFFI(NULL, context, typical->type_, ffi, base, value);
 923     return true;
 924 } CYCatch(false) }
 925
 926 static JSValueRef Struct_callAsFunction_$cya(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 927     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(_this)));
 928     Type_privateData *typical(internal->type_);
 929     return CYMakePointer(context, internal->value_, _not(size_t), typical->type_, typical->ffi_, _this);
 930 } CYCatch(NULL) }
 931
 932 static JSValueRef Struct_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 933     CYPool pool;
 934     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 935     Type_privateData *typical(internal->type_);
 936
 937     ssize_t index;
 938     uint8_t *base;
 939
 940     if (!Index_(pool, context, internal, property, index, base))
 941         return NULL;
 942
 943     JSObjectRef owner(internal->GetOwner() ?: object);
 944
 945     return CYFromFFI(context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, false, owner);
 946 } CYCatch(NULL) }
 947
 948 static bool Struct_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 949     CYPool pool;
 950     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 951     Type_privateData *typical(internal->type_);
 952
 953     ssize_t index;
 954     uint8_t *base;
 955
 956     if (!Index_(pool, context, internal, property, index, base))
 957         return false;
 958
 959     CYPoolFFI(NULL, context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, value);
 960     return true;
 961 } CYCatch(false) }
 962
 963 static void Struct_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
 964     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 965     Type_privateData *typical(internal->type_);
 966     sig::Type *type(typical->type_);
 967
 968     if (type == NULL)
 969         return;
 970
 971     size_t count(type->data.signature.count);
 972     sig::Element *elements(type->data.signature.elements);
 973
 974     char number[32];
 975
 976     for (size_t index(0); index != count; ++index) {
 977         const char *name;
 978         name = elements[index].name;
 979
 980         if (name == NULL) {
 981             sprintf(number, "%zu", index);
 982             name = number;
 983         }
 984
 985         JSPropertyNameAccumulatorAddName(names, CYJSString(name));
 986     }
 987 }
 988
 989 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)()) {
 990     if (setups + count != signature->count - 1)
 991         throw CYJSError(context, "incorrect number of arguments to ffi function");
 992
 993     size_t size(setups + count);
 994     void *values[size];
 995     memcpy(values, setup, sizeof(void *) * setups);
 996
 997     for (size_t index(setups); index != size; ++index) {
 998         sig::Element *element(&signature->elements[index + 1]);
 999         ffi_type *ffi(cif->arg_types[index]);
1000         // XXX: alignment?
1001         values[index] = new(pool) uint8_t[ffi->size];
1002         CYPoolFFI(&pool, context, element->type, ffi, values[index], arguments[index - setups]);
1003     }
1004
1005     uint8_t value[cif->rtype->size];
1006
1007     for (CYHook *hook : GetHooks())
1008         if (hook->CallFunction != NULL) {
1009             // XXX: this only supports one hook, but it is a bad idea anyway
1010             (*hook->CallFunction)(context, cif, function, value, values);
1011             goto from;
1012         }
1013     ffi_call(cif, function, value, values);
1014
1015   from:
1016     return CYFromFFI(context, signature->elements[0].type, cif->rtype, value, initialize);
1017 }
1018
1019 static JSValueRef Functor_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1020     CYPool pool;
1021     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
1022     return CYCallFunction(pool, context, 0, NULL, count, arguments, false, &internal->signature_, &internal->cif_, internal->GetValue());
1023 } CYCatch(NULL) }
1024
1025 JSObjectRef CYMakeType(JSContextRef context, const char *encoding) {
1026     Type_privateData *internal(new Type_privateData(encoding));
1027     return JSObjectMake(context, Type_privateData::Class_, internal);
1028 }
1029
1030 JSObjectRef CYMakeType(JSContextRef context, sig::Type *type) {
1031     Type_privateData *internal(new Type_privateData(type));
1032     return JSObjectMake(context, Type_privateData::Class_, internal);
1033 }
1034
1035 JSObjectRef CYMakeType(JSContextRef context, sig::Signature *signature) {
1036     CYPool pool;
1037
1038     sig::Type type;
1039     type.name = NULL;
1040     type.flags = 0;
1041
1042     type.primitive = sig::function_P;
1043     sig::Copy(pool, type.data.signature, *signature);
1044
1045     return CYMakeType(context, &type);
1046 }
1047
1048 static bool All_hasProperty(JSContextRef context, JSObjectRef object, JSStringRef property) {
1049     JSObjectRef global(CYGetGlobalObject(context));
1050     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
1051     JSObjectRef alls(CYCastJSObject(context, CYGetProperty(context, cycript, CYJSString("alls"))));
1052
1053     for (size_t i(0), count(CYArrayLength(context, alls)); i != count; ++i)
1054         if (JSObjectRef space = CYCastJSObject(context, CYArrayGet(context, alls, count - i - 1)))
1055             if (CYHasProperty(context, space, property))
1056                 return true;
1057
1058     CYPool pool;
1059     CYUTF8String name(CYPoolUTF8String(pool, context, property));
1060
1061     size_t length(name.size);
1062     char keyed[length + 2];
1063     memcpy(keyed + 1, name.data, length + 1);
1064
1065     static const char *modes = "0124";
1066     for (size_t i(0); i != 4; ++i) {
1067         keyed[0] = modes[i];
1068         if (CYBridgeHash(keyed, length + 1) != NULL)
1069             return true;
1070     }
1071
1072     return false;
1073 }
1074
1075 static JSValueRef All_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1076     JSObjectRef global(CYGetGlobalObject(context));
1077     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
1078     JSObjectRef alls(CYCastJSObject(context, CYGetProperty(context, cycript, CYJSString("alls"))));
1079
1080     for (size_t i(0), count(CYArrayLength(context, alls)); i != count; ++i)
1081         if (JSObjectRef space = CYCastJSObject(context, CYArrayGet(context, alls, count - i - 1)))
1082             if (JSValueRef value = CYGetProperty(context, space, property))
1083                 if (!JSValueIsUndefined(context, value))
1084                     return value;
1085
1086     CYPool pool;
1087     CYUTF8String name(CYPoolUTF8String(pool, context, property));
1088
1089     size_t length(name.size);
1090     char keyed[length + 2];
1091     memcpy(keyed + 1, name.data, length + 1);
1092
1093     static const char *modes = "0124";
1094     for (size_t i(0); i != 4; ++i) {
1095         char mode(modes[i]);
1096         keyed[0] = mode;
1097
1098         if (CYBridgeEntry *entry = CYBridgeHash(keyed, length + 1))
1099             switch (mode) {
1100                 case '0':
1101                     return JSEvaluateScript(CYGetJSContext(context), CYJSString(entry->value_), NULL, NULL, 0, NULL);
1102
1103                 case '1':
1104                     return CYMakeFunctor(context, name.data, entry->value_, &entry->cache_);
1105
1106                 case '2':
1107                     if (void *symbol = CYCastSymbol(name.data)) {
1108                         // XXX: this is horrendously inefficient
1109                         sig::Signature signature;
1110                         sig::Parse(pool, &signature, entry->value_, &Structor_);
1111                         ffi_cif cif;
1112                         sig::sig_ffi_cif(pool, &sig::ObjectiveC, &signature, &cif);
1113                         return CYFromFFI(context, signature.elements[0].type, cif.rtype, symbol);
1114                     } else return NULL;
1115
1116                 // XXX: implement case 3
1117                 case '4':
1118                     return CYMakeType(context, entry->value_);
1119             }
1120     }
1121
1122     return NULL;
1123 } CYCatch(NULL) }
1124
1125 static void All_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
1126     JSObjectRef global(CYGetGlobalObject(context));
1127     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
1128     JSObjectRef alls(CYCastJSObject(context, CYGetProperty(context, cycript, CYJSString("alls"))));
1129
1130     for (size_t i(0), count(CYArrayLength(context, alls)); i != count; ++i)
1131         if (JSObjectRef space = CYCastJSObject(context, CYArrayGet(context, alls, count - i - 1))) {
1132             JSPropertyNameArrayRef subset(JSObjectCopyPropertyNames(context, space));
1133             for (size_t index(0), count(JSPropertyNameArrayGetCount(subset)); index != count; ++index)
1134                 JSPropertyNameAccumulatorAddName(names, JSPropertyNameArrayGetNameAtIndex(subset, index));
1135             JSPropertyNameArrayRelease(subset);
1136         }
1137 }
1138
1139 static JSObjectRef Pointer_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1140     if (count != 2)
1141         throw CYJSError(context, "incorrect number of arguments to Pointer constructor");
1142
1143     CYPool pool;
1144
1145     void *value(CYCastPointer<void *>(context, arguments[0]));
1146     const char *type(CYPoolCString(pool, context, arguments[1]));
1147
1148     sig::Signature signature;
1149     sig::Parse(pool, &signature, type, &Structor_);
1150
1151     return CYMakePointer(context, value, _not(size_t), signature.elements[0].type, NULL, NULL);
1152 } CYCatch(NULL) }
1153
1154 static JSObjectRef Type_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1155     if (count != 1)
1156         throw CYJSError(context, "incorrect number of arguments to Type constructor");
1157     CYPool pool;
1158     const char *type(CYPoolCString(pool, context, arguments[0]));
1159     return CYMakeType(context, type);
1160 } CYCatch(NULL) }
1161
1162 static JSValueRef Type_callAsFunction_$With(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], sig::Primitive primitive, JSValueRef *exception) { CYTry {
1163     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1164
1165     CYPool pool;
1166
1167     sig::Type type;
1168     type.name = NULL;
1169     type.flags = 0;
1170
1171     type.primitive = primitive;
1172     type.data.signature.elements = new(pool) sig::Element[1 + count];
1173     type.data.signature.count = 1 + count;
1174
1175     type.data.signature.elements[0].name = NULL;
1176     type.data.signature.elements[0].type = internal->type_;
1177     type.data.signature.elements[0].offset = _not(size_t);
1178
1179     for (size_t i(0); i != count; ++i) {
1180         sig::Element &element(type.data.signature.elements[i + 1]);
1181         element.name = NULL;
1182         element.offset = _not(size_t);
1183
1184         JSObjectRef object(CYCastJSObject(context, arguments[i]));
1185         _assert(JSValueIsObjectOfClass(context, object, Type_privateData::Class_));
1186         Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1187
1188         element.type = internal->type_;
1189     }
1190
1191     return CYMakeType(context, &type);
1192 } CYCatch(NULL) }
1193
1194 static JSValueRef Type_callAsFunction_arrayOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1195     if (count != 1)
1196         throw CYJSError(context, "incorrect number of arguments to Type.arrayOf");
1197     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1198
1199     CYPool pool;
1200     size_t index(CYGetIndex(pool, context, CYJSString(context, arguments[0])));
1201     if (index == _not(size_t))
1202         throw CYJSError(context, "invalid array size used with Type.arrayOf");
1203
1204     sig::Type type;
1205     type.name = NULL;
1206     type.flags = 0;
1207
1208     type.primitive = sig::array_P;
1209     type.data.data.type = internal->type_;
1210     type.data.data.size = index;
1211
1212     return CYMakeType(context, &type);
1213 } CYCatch(NULL) }
1214
1215 static JSValueRef Type_callAsFunction_blockWith(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1216     return Type_callAsFunction_$With(context, object, _this, count, arguments, sig::block_P, exception);
1217 }
1218
1219 static JSValueRef Type_callAsFunction_constant(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1220     if (count != 0)
1221         throw CYJSError(context, "incorrect number of arguments to Type.constant");
1222     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1223
1224     sig::Type type(*internal->type_);
1225     type.flags |= JOC_TYPE_CONST;
1226     return CYMakeType(context, &type);
1227 } CYCatch(NULL) }
1228
1229 static JSValueRef Type_callAsFunction_long(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1230     if (count != 0)
1231         throw CYJSError(context, "incorrect number of arguments to Type.long");
1232     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1233
1234     sig::Type type(*internal->type_);
1235
1236     switch (type.primitive) {
1237         case sig::short_P: type.primitive = sig::int_P; break;
1238         case sig::int_P: type.primitive = sig::long_P; break;
1239         case sig::long_P: type.primitive = sig::longlong_P; break;
1240         default: throw CYJSError(context, "invalid type argument to Type.long");
1241     }
1242
1243     return CYMakeType(context, &type);
1244 } CYCatch(NULL) }
1245
1246 static JSValueRef Type_callAsFunction_short(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1247     if (count != 0)
1248         throw CYJSError(context, "incorrect number of arguments to Type.short");
1249     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1250
1251     sig::Type type(*internal->type_);
1252
1253     switch (type.primitive) {
1254         case sig::int_P: type.primitive = sig::short_P; break;
1255         case sig::long_P: type.primitive = sig::int_P; break;
1256         case sig::longlong_P: type.primitive = sig::long_P; break;
1257         default: throw CYJSError(context, "invalid type argument to Type.short");
1258     }
1259
1260     return CYMakeType(context, &type);
1261 } CYCatch(NULL) }
1262
1263 static JSValueRef Type_callAsFunction_signed(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1264     if (count != 0)
1265         throw CYJSError(context, "incorrect number of arguments to Type.signed");
1266     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1267
1268     sig::Type type(*internal->type_);
1269
1270     switch (type.primitive) {
1271         case sig::char_P: case sig::uchar_P: type.primitive = sig::char_P; break;
1272         case sig::short_P: case sig::ushort_P: type.primitive = sig::short_P; break;
1273         case sig::int_P: case sig::uint_P: type.primitive = sig::int_P; break;
1274         case sig::long_P: case sig::ulong_P: type.primitive = sig::long_P; break;
1275         case sig::longlong_P: case sig::ulonglong_P: type.primitive = sig::longlong_P; break;
1276         default: throw CYJSError(context, "invalid type argument to Type.signed");
1277     }
1278
1279     return CYMakeType(context, &type);
1280 } CYCatch(NULL) }
1281
1282 static JSValueRef Type_callAsFunction_unsigned(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1283     if (count != 0)
1284         throw CYJSError(context, "incorrect number of arguments to Type.unsigned");
1285     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1286
1287     sig::Type type(*internal->type_);
1288
1289     switch (type.primitive) {
1290         case sig::char_P: case sig::uchar_P: type.primitive = sig::uchar_P; break;
1291         case sig::short_P: case sig::ushort_P: type.primitive = sig::ushort_P; break;
1292         case sig::int_P: case sig::uint_P: type.primitive = sig::uint_P; break;
1293         case sig::long_P: case sig::ulong_P: type.primitive = sig::ulong_P; break;
1294         case sig::longlong_P: case sig::ulonglong_P: type.primitive = sig::ulonglong_P; break;
1295         default: throw CYJSError(context, "invalid type argument to Type.unsigned");
1296     }
1297
1298     return CYMakeType(context, &type);
1299 } CYCatch(NULL) }
1300
1301 static JSValueRef Type_callAsFunction_functionWith(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1302     return Type_callAsFunction_$With(context, object, _this, count, arguments, sig::function_P, exception);
1303 }
1304
1305 static JSValueRef Type_callAsFunction_pointerTo(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1306     if (count != 0)
1307         throw CYJSError(context, "incorrect number of arguments to Type.pointerTo");
1308     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1309
1310     sig::Type type;
1311     type.name = NULL;
1312
1313     if (internal->type_->primitive == sig::char_P) {
1314         type.flags = internal->type_->flags;
1315         type.primitive = sig::string_P;
1316         type.data.data.type = NULL;
1317         type.data.data.size = 0;
1318     } else {
1319         type.flags = 0;
1320         type.primitive = sig::pointer_P;
1321         type.data.data.type = internal->type_;
1322         type.data.data.size = 0;
1323     }
1324
1325     return CYMakeType(context, &type);
1326 } CYCatch(NULL) }
1327
1328 static JSValueRef Type_callAsFunction_withName(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1329     if (count != 1)
1330         throw CYJSError(context, "incorrect number of arguments to Type.withName");
1331     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1332
1333     CYPool pool;
1334     const char *name(CYPoolCString(pool, context, arguments[0]));
1335
1336     sig::Type type(*internal->type_);
1337     type.name = name;
1338     return CYMakeType(context, &type);
1339 } CYCatch(NULL) }
1340
1341 static JSValueRef Type_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1342     if (count != 1)
1343         throw CYJSError(context, "incorrect number of arguments to type cast function");
1344     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1345
1346     if (internal->type_->primitive == sig::function_P)
1347         return CYMakeFunctor(context, arguments[0], internal->type_->data.signature);
1348
1349     sig::Type *type(internal->type_);
1350     ffi_type *ffi(internal->GetFFI());
1351     // XXX: alignment?
1352     uint8_t value[ffi->size];
1353     CYPool pool;
1354     CYPoolFFI(&pool, context, type, ffi, value, arguments[0]);
1355     return CYFromFFI(context, type, ffi, value);
1356 } CYCatch(NULL) }
1357
1358 static JSObjectRef Type_callAsConstructor(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1359     if (count != 0)
1360         throw CYJSError(context, "incorrect number of arguments to Type allocator");
1361     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1362
1363     sig::Type *type(internal->type_);
1364     size_t length;
1365
1366     if (type->primitive != sig::array_P)
1367         length = _not(size_t);
1368     else {
1369         length = type->data.data.size;
1370         type = type->data.data.type;
1371     }
1372
1373     void *value(calloc(1, internal->GetFFI()->size));
1374     return CYMakePointer(context, value, length, type, NULL, NULL);
1375 } CYCatch(NULL) }
1376
1377 static JSObjectRef Functor_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1378     if (count != 2)
1379         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1380     CYPool pool;
1381     const char *encoding(CYPoolCString(pool, context, arguments[1]));
1382     sig::Signature signature;
1383     sig::Parse(pool, &signature, encoding, &Structor_);
1384     return CYMakeFunctor(context, arguments[0], signature);
1385 } CYCatch(NULL) }
1386
1387 static JSValueRef CYValue_callAsFunction_valueOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1388     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1389     return CYCastJSValue(context, reinterpret_cast<uintptr_t>(internal->value_));
1390 } CYCatch(NULL) }
1391
1392 static JSValueRef CYValue_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1393     return CYValue_callAsFunction_valueOf(context, object, _this, count, arguments, exception);
1394 }
1395
1396 static JSValueRef CYValue_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1397     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1398     char string[32];
1399     sprintf(string, "%p", internal->value_);
1400     return CYCastJSValue(context, string);
1401 } CYCatch(NULL) }
1402
1403 static JSValueRef Pointer_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1404     std::set<void *> *objects(CYCastObjects(context, _this, count, arguments));
1405
1406     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(_this)));
1407     if (internal->length_ != _not(size_t)) {
1408         JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array_prototype")));
1409         JSObjectRef toCYON(CYCastJSObject(context, CYGetProperty(context, Array, toCYON_s)));
1410         return CYCallAsFunction(context, toCYON, _this, count, arguments);
1411     } else if (internal->type_->type_ == NULL) pointer: {
1412         char string[32];
1413         sprintf(string, "%p", internal->value_);
1414         return CYCastJSValue(context, string);
1415     } try {
1416         JSValueRef value(CYGetProperty(context, _this, cyi_s));
1417         if (JSValueIsUndefined(context, value))
1418             goto pointer;
1419         CYPool pool;
1420         return CYCastJSValue(context, pool.strcat("&", CYPoolCCYON(pool, context, value, objects), NULL));
1421     } catch (const CYException &e) {
1422         goto pointer;
1423     }
1424 } CYCatch(NULL) }
1425
1426 static JSValueRef Pointer_getProperty_type(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1427     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
1428     return CYMakeType(context, internal->type_->type_);
1429 } CYCatch(NULL) }
1430
1431 static JSValueRef Functor_getProperty_type(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1432     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
1433     return CYMakeType(context, &internal->signature_);
1434 } CYCatch(NULL) }
1435
1436 static JSValueRef Type_getProperty_alignment(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1437     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1438     return CYCastJSValue(context, internal->GetFFI()->alignment);
1439 } CYCatch(NULL) }
1440
1441 static JSValueRef Type_getProperty_name(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1442     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1443     return CYCastJSValue(context, internal->type_->name);
1444 } CYCatch(NULL) }
1445
1446 static JSValueRef Type_getProperty_size(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1447     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1448     return CYCastJSValue(context, internal->GetFFI()->size);
1449 } CYCatch(NULL) }
1450
1451 static JSValueRef Type_callAsFunction_toString(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1452     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1453     CYPool pool;
1454     const char *type(sig::Unparse(pool, internal->type_));
1455     return CYCastJSValue(context, CYJSString(type));
1456 } CYCatch(NULL) }
1457
1458 static JSValueRef Type_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1459     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1460     CYLocalPool pool;
1461     std::ostringstream out;
1462     CYOptions options;
1463     CYOutput output(out, options);
1464     (new(pool) CYEncodedType(Decode(pool, internal->type_)))->Output(output, CYNoFlags);
1465     return CYCastJSValue(context, CYJSString(out.str().c_str()));
1466 } CYCatch(NULL) }
1467
1468 static JSValueRef Type_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1469     return Type_callAsFunction_toString(context, object, _this, count, arguments, exception);
1470 }
1471
1472 static JSStaticFunction Pointer_staticFunctions[4] = {
1473     {"toCYON", &Pointer_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1474     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1475     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1476     {NULL, NULL, 0}
1477 };
1478
1479 static JSStaticValue Pointer_staticValues[2] = {
1480     {"type", &Pointer_getProperty_type, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1481     {NULL, NULL, NULL, 0}
1482 };
1483
1484 static JSStaticFunction Struct_staticFunctions[2] = {
1485     {"$cya", &Struct_callAsFunction_$cya, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1486     {NULL, NULL, 0}
1487 };
1488
1489 static JSStaticFunction Functor_staticFunctions[4] = {
1490     {"toCYON", &CYValue_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1491     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1492     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1493     {NULL, NULL, 0}
1494 };
1495
1496 namespace cy {
1497     JSStaticFunction const * const Functor::StaticFunctions = Functor_staticFunctions;
1498 }
1499
1500 static JSStaticValue Functor_staticValues[2] = {
1501     {"type", &Functor_getProperty_type, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1502     {NULL, NULL, NULL, 0}
1503 };
1504
1505 namespace cy {
1506     JSStaticValue const * const Functor::StaticValues = Functor_staticValues;
1507 }
1508
1509 static JSStaticValue Type_staticValues[4] = {
1510     {"alignment", &Type_getProperty_alignment, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1511     {"name", &Type_getProperty_name, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1512     {"size", &Type_getProperty_size, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1513     {NULL, NULL, NULL, 0}
1514 };
1515
1516 static JSStaticFunction Type_staticFunctions[14] = {
1517     {"arrayOf", &Type_callAsFunction_arrayOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1518     {"blockWith", &Type_callAsFunction_blockWith, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1519     {"constant", &Type_callAsFunction_constant, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1520     {"functionWith", &Type_callAsFunction_functionWith, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1521     {"long", &Type_callAsFunction_long, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1522     {"pointerTo", &Type_callAsFunction_pointerTo, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1523     {"short", &Type_callAsFunction_short, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1524     {"signed", &Type_callAsFunction_signed, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1525     {"withName", &Type_callAsFunction_withName, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1526     {"toCYON", &Type_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1527     {"toJSON", &Type_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1528     {"toString", &Type_callAsFunction_toString, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1529     {"unsigned", &Type_callAsFunction_unsigned, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1530     {NULL, NULL, 0}
1531 };
1532
1533 static JSObjectRef (*JSObjectMakeArray$)(JSContextRef, size_t, const JSValueRef[], JSValueRef *);
1534
1535 void CYSetArgs(int argc, const char *argv[]) {
1536     JSContextRef context(CYGetJSContext());
1537     JSValueRef args[argc];
1538     for (int i(0); i != argc; ++i)
1539         args[i] = CYCastJSValue(context, argv[i]);
1540
1541     JSObjectRef array;
1542     if (JSObjectMakeArray$ != NULL)
1543         array = _jsccall(*JSObjectMakeArray$, context, argc, args);
1544     else {
1545         JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array")));
1546         JSValueRef value(CYCallAsFunction(context, Array, NULL, argc, args));
1547         array = CYCastJSObject(context, value);
1548     }
1549
1550     JSObjectRef System(CYGetCachedObject(context, CYJSString("System")));
1551     CYSetProperty(context, System, CYJSString("args"), array);
1552 }
1553
1554 JSObjectRef CYGetGlobalObject(JSContextRef context) {
1555     return JSContextGetGlobalObject(context);
1556 }
1557
1558 // XXX: this is neither exceptin safe nor even terribly sane
1559 class ExecutionHandle {
1560   private:
1561     JSContextRef context_;
1562     std::vector<void *> handles_;
1563
1564   public:
1565     ExecutionHandle(JSContextRef context) :
1566         context_(context)
1567     {
1568         handles_.resize(GetHooks().size());
1569         for (size_t i(0); i != GetHooks().size(); ++i) {
1570             CYHook *hook(GetHooks()[i]);
1571             if (hook->ExecuteStart != NULL)
1572                 handles_[i] = (*hook->ExecuteStart)(context_);
1573             else
1574                 handles_[i] = NULL;
1575         }
1576     }
1577
1578     ~ExecutionHandle() {
1579         for (size_t i(GetHooks().size()); i != 0; --i) {
1580             CYHook *hook(GetHooks()[i-1]);
1581             if (hook->ExecuteEnd != NULL)
1582                 (*hook->ExecuteEnd)(context_, handles_[i-1]);
1583         }
1584     }
1585 };
1586
1587 const char *CYExecute(JSContextRef context, CYPool &pool, CYUTF8String code) {
1588     JSValueRef exception(NULL);
1589
1590     ExecutionHandle handle(context);
1591
1592     JSValueRef result; try {
1593         result = JSEvaluateScript(context, CYJSString(code), NULL, NULL, 0, &exception);
1594     } catch (const char *error) {
1595         return error;
1596     }
1597
1598     if (exception != NULL) error:
1599         return CYPoolCString(pool, context, CYJSString(context, exception));
1600
1601     if (JSValueIsUndefined(context, result))
1602         return NULL;
1603
1604     const char *json; try {
1605         std::set<void *> objects;
1606         json = CYPoolCCYON(pool, context, result, objects, &exception);
1607     } catch (const char *error) {
1608         return error;
1609     }
1610
1611     if (exception != NULL)
1612         goto error;
1613
1614     CYSetProperty(context, CYGetGlobalObject(context), Result_, result);
1615
1616     return json;
1617 }
1618
1619 static bool initialized_ = false;
1620
1621 void CYInitializeDynamic() {
1622     if (!initialized_)
1623         initialized_ = true;
1624     else return;
1625
1626     JSObjectMakeArray$ = reinterpret_cast<JSObjectRef (*)(JSContextRef, size_t, const JSValueRef[], JSValueRef *)>(dlsym(RTLD_DEFAULT, "JSObjectMakeArray"));
1627     JSSynchronousGarbageCollectForDebugging$ = reinterpret_cast<void (*)(JSContextRef)>(dlsym(RTLD_DEFAULT, "JSSynchronousGarbageCollectForDebugging"));
1628
1629     JSClassDefinition definition;
1630
1631     definition = kJSClassDefinitionEmpty;
1632     definition.className = "All";
1633     definition.hasProperty = &All_hasProperty;
1634     definition.getProperty = &All_getProperty;
1635     definition.getPropertyNames = &All_getPropertyNames;
1636     All_ = JSClassCreate(&definition);
1637
1638     definition = kJSClassDefinitionEmpty;
1639     definition.className = "Context";
1640     definition.finalize = &CYFinalize;
1641     Context_ = JSClassCreate(&definition);
1642
1643     definition = kJSClassDefinitionEmpty;
1644     definition.className = "Functor";
1645     definition.staticFunctions = cy::Functor::StaticFunctions;
1646     definition.staticValues = Functor_staticValues;
1647     definition.callAsFunction = &Functor_callAsFunction;
1648     definition.finalize = &CYFinalize;
1649     Functor_ = JSClassCreate(&definition);
1650
1651     definition = kJSClassDefinitionEmpty;
1652     definition.className = "Pointer";
1653     definition.staticFunctions = Pointer_staticFunctions;
1654     definition.staticValues = Pointer_staticValues;
1655     definition.getProperty = &Pointer_getProperty;
1656     definition.setProperty = &Pointer_setProperty;
1657     definition.finalize = &CYFinalize;
1658     Pointer_ = JSClassCreate(&definition);
1659
1660     definition = kJSClassDefinitionEmpty;
1661     definition.className = "Struct";
1662     definition.staticFunctions = Struct_staticFunctions;
1663     definition.getProperty = &Struct_getProperty;
1664     definition.setProperty = &Struct_setProperty;
1665     definition.getPropertyNames = &Struct_getPropertyNames;
1666     definition.finalize = &CYFinalize;
1667     Struct_ = JSClassCreate(&definition);
1668
1669     definition = kJSClassDefinitionEmpty;
1670     definition.className = "Type";
1671     definition.staticValues = Type_staticValues;
1672     definition.staticFunctions = Type_staticFunctions;
1673     definition.callAsFunction = &Type_callAsFunction;
1674     definition.callAsConstructor = &Type_callAsConstructor;
1675     definition.finalize = &CYFinalize;
1676     Type_privateData::Class_ = JSClassCreate(&definition);
1677
1678     definition = kJSClassDefinitionEmpty;
1679     definition.className = "Global";
1680     //definition.getProperty = &Global_getProperty;
1681     Global_ = JSClassCreate(&definition);
1682
1683     Array_s = JSStringCreateWithUTF8CString("Array");
1684     cy_s = JSStringCreateWithUTF8CString("$cy");
1685     cyi_s = JSStringCreateWithUTF8CString("$cyi");
1686     length_s = JSStringCreateWithUTF8CString("length");
1687     message_s = JSStringCreateWithUTF8CString("message");
1688     name_s = JSStringCreateWithUTF8CString("name");
1689     pop_s = JSStringCreateWithUTF8CString("pop");
1690     prototype_s = JSStringCreateWithUTF8CString("prototype");
1691     push_s = JSStringCreateWithUTF8CString("push");
1692     splice_s = JSStringCreateWithUTF8CString("splice");
1693     toCYON_s = JSStringCreateWithUTF8CString("toCYON");
1694     toJSON_s = JSStringCreateWithUTF8CString("toJSON");
1695     toPointer_s = JSStringCreateWithUTF8CString("toPointer");
1696     toString_s = JSStringCreateWithUTF8CString("toString");
1697
1698     Result_ = JSStringCreateWithUTF8CString("_");
1699
1700     for (CYHook *hook : GetHooks())
1701         if (hook->Initialize != NULL)
1702             (*hook->Initialize)();
1703 }
1704
1705 void CYThrow(JSContextRef context, JSValueRef value) {
1706     if (value != NULL)
1707         throw CYJSError(context, value);
1708 }
1709
1710 const char *CYJSError::PoolCString(CYPool &pool) const {
1711     std::set<void *> objects;
1712     // XXX: this used to be CYPoolCString
1713     return CYPoolCCYON(pool, context_, value_, objects);
1714 }
1715
1716 JSValueRef CYJSError::CastJSValue(JSContextRef context) const {
1717     // XXX: what if the context is different?
1718     return value_;
1719 }
1720
1721 JSValueRef CYCastJSError(JSContextRef context, const char *message) {
1722     JSObjectRef Error(CYGetCachedObject(context, CYJSString("Error")));
1723     JSValueRef arguments[1] = {CYCastJSValue(context, message)};
1724     return _jsccall(JSObjectCallAsConstructor, context, Error, 1, arguments);
1725 }
1726
1727 JSValueRef CYPoolError::CastJSValue(JSContextRef context) const {
1728     return CYCastJSError(context, message_);
1729 }
1730
1731 CYJSError::CYJSError(JSContextRef context, const char *format, ...) {
1732     _assert(context != NULL);
1733
1734     CYPool pool;
1735
1736     va_list args;
1737     va_start(args, format);
1738     // XXX: there might be a beter way to think about this
1739     const char *message(pool.vsprintf(64, format, args));
1740     va_end(args);
1741
1742     value_ = CYCastJSError(context, message);
1743 }
1744
1745 JSGlobalContextRef CYGetJSContext(JSContextRef context) {
1746     return reinterpret_cast<Context *>(JSObjectGetPrivate(CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s))))->context_;
1747 }
1748
1749 extern "C" bool CydgetMemoryParse(const uint16_t **data, size_t *size);
1750
1751 void *CYMapFile(const char *path, size_t *psize) {
1752     int fd(_syscall_(open(path, O_RDONLY), 1, {ENOENT}));
1753     if (fd == -1)
1754         return NULL;
1755
1756     struct stat stat;
1757     _syscall(fstat(fd, &stat));
1758     size_t size(stat.st_size);
1759
1760     *psize = size;
1761
1762     void *base;
1763     _syscall(base = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0));
1764
1765     _syscall(close(fd));
1766     return base;
1767 }
1768
1769 static JSValueRef require(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1770     _assert(count == 1);
1771     CYPool pool;
1772
1773     Dl_info addr;
1774     _assert(dladdr(reinterpret_cast<void *>(&require), &addr) != 0);
1775     char *lib(pool.strdup(addr.dli_fname));
1776
1777     char *slash(strrchr(lib, '/'));
1778     _assert(slash != NULL);
1779     *slash = '\0';
1780
1781     CYJSString property("exports");
1782     JSObjectRef module;
1783
1784     const char *name(CYPoolCString(pool, context, arguments[0]));
1785     const char *path(pool.strcat(lib, "/cycript0.9/", name, ".cy", NULL));
1786
1787     CYJSString key(path);
1788     JSObjectRef modules(CYGetCachedObject(context, CYJSString("modules")));
1789     JSValueRef cache(CYGetProperty(context, modules, key));
1790
1791     if (!JSValueIsUndefined(context, cache))
1792         module = CYCastJSObject(context, cache);
1793     else {
1794         CYUTF8String code;
1795         code.data = reinterpret_cast<char *>(CYMapFile(path, &code.size));
1796
1797         if (code.data == NULL) {
1798             if (strchr(name, '/') == NULL && (
1799 #ifdef __APPLE__
1800                 dlopen(pool.strcat("/System/Library/Frameworks/", name, ".framework/", name, NULL), RTLD_LAZY | RTLD_GLOBAL) != NULL ||
1801                 dlopen(pool.strcat("/System/Library/PrivateFrameworks/", name, ".framework/", name, NULL), RTLD_LAZY | RTLD_GLOBAL) != NULL ||
1802 #endif
1803             false))
1804                 return CYJSUndefined(NULL);
1805
1806             CYThrow("Can't find module: %s", name);
1807         }
1808
1809         module = JSObjectMake(context, NULL, NULL);
1810         CYSetProperty(context, modules, key, module);
1811
1812         JSObjectRef exports(JSObjectMake(context, NULL, NULL));
1813         CYSetProperty(context, module, property, exports);
1814
1815         std::stringstream wrap;
1816         wrap << "(function (exports, require, module) { " << code << "\n});";
1817         code = CYPoolCode(pool, wrap);
1818
1819         JSValueRef value(_jsccall(JSEvaluateScript, context, CYJSString(code), NULL, NULL, 0));
1820         JSObjectRef function(CYCastJSObject(context, value));
1821
1822         JSValueRef arguments[3] = { exports, JSObjectMakeFunctionWithCallback(context, CYJSString("require"), &require), module };
1823         CYCallAsFunction(context, function, NULL, 3, arguments);
1824     }
1825
1826     return CYGetProperty(context, module, property);
1827 } CYCatch(NULL) }
1828
1829 extern "C" void CYSetupContext(JSGlobalContextRef context) {
1830     CYInitializeDynamic();
1831
1832     JSObjectRef global(CYGetGlobalObject(context));
1833
1834     JSObjectRef cy(JSObjectMake(context, Context_, new Context(context)));
1835     CYSetProperty(context, global, cy_s, cy, kJSPropertyAttributeDontEnum);
1836
1837 /* Cache Globals {{{ */
1838     JSObjectRef Array(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Array"))));
1839     CYSetProperty(context, cy, CYJSString("Array"), Array);
1840
1841     JSObjectRef Array_prototype(CYCastJSObject(context, CYGetProperty(context, Array, prototype_s)));
1842     CYSetProperty(context, cy, CYJSString("Array_prototype"), Array_prototype);
1843
1844     JSObjectRef Boolean(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Boolean"))));
1845     CYSetProperty(context, cy, CYJSString("Boolean"), Boolean);
1846
1847     JSObjectRef Boolean_prototype(CYCastJSObject(context, CYGetProperty(context, Boolean, prototype_s)));
1848     CYSetProperty(context, cy, CYJSString("Boolean_prototype"), Boolean_prototype);
1849
1850     JSObjectRef Error(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Error"))));
1851     CYSetProperty(context, cy, CYJSString("Error"), Error);
1852
1853     JSObjectRef Function(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Function"))));
1854     CYSetProperty(context, cy, CYJSString("Function"), Function);
1855
1856     JSObjectRef Function_prototype(CYCastJSObject(context, CYGetProperty(context, Function, prototype_s)));
1857     CYSetProperty(context, cy, CYJSString("Function_prototype"), Function_prototype);
1858
1859     JSObjectRef Number(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Number"))));
1860     CYSetProperty(context, cy, CYJSString("Number"), Number);
1861
1862     JSObjectRef Number_prototype(CYCastJSObject(context, CYGetProperty(context, Number, prototype_s)));
1863     CYSetProperty(context, cy, CYJSString("Number_prototype"), Number_prototype);
1864
1865     JSObjectRef Object(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Object"))));
1866     CYSetProperty(context, cy, CYJSString("Object"), Object);
1867
1868     JSObjectRef Object_prototype(CYCastJSObject(context, CYGetProperty(context, Object, prototype_s)));
1869     CYSetProperty(context, cy, CYJSString("Object_prototype"), Object_prototype);
1870
1871     JSObjectRef String(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("String"))));
1872     CYSetProperty(context, cy, CYJSString("String"), String);
1873
1874     JSObjectRef String_prototype(CYCastJSObject(context, CYGetProperty(context, String, prototype_s)));
1875     CYSetProperty(context, cy, CYJSString("String_prototype"), String_prototype);
1876 /* }}} */
1877
1878     CYSetProperty(context, Array_prototype, toCYON_s, &Array_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1879     CYSetProperty(context, String_prototype, toCYON_s, &String_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1880
1881     JSObjectRef cycript(JSObjectMake(context, NULL, NULL));
1882     CYSetProperty(context, global, CYJSString("Cycript"), cycript);
1883     CYSetProperty(context, cycript, CYJSString("gc"), &Cycript_gc_callAsFunction);
1884
1885     JSObjectRef Functor(JSObjectMakeConstructor(context, Functor_, &Functor_new));
1886     CYSetPrototype(context, CYCastJSObject(context, CYGetProperty(context, Functor, prototype_s)), Function_prototype);
1887     CYSetProperty(context, cycript, CYJSString("Functor"), Functor);
1888
1889     CYSetProperty(context, cycript, CYJSString("Pointer"), JSObjectMakeConstructor(context, Pointer_, &Pointer_new));
1890     CYSetProperty(context, cycript, CYJSString("Type"), JSObjectMakeConstructor(context, Type_privateData::Class_, &Type_new));
1891
1892     JSObjectRef modules(JSObjectMake(context, NULL, NULL));
1893     CYSetProperty(context, cy, CYJSString("modules"), modules);
1894
1895     JSObjectRef all(JSObjectMake(context, All_, NULL));
1896     CYSetProperty(context, cycript, CYJSString("all"), all);
1897
1898     JSObjectRef alls(_jsccall(JSObjectCallAsConstructor, context, Array, 0, NULL));
1899     CYSetProperty(context, cycript, CYJSString("alls"), alls);
1900
1901     if (true) {
1902         JSObjectRef last(NULL), curr(global);
1903
1904         goto next; for (JSValueRef next;;) {
1905             if (JSValueIsNull(context, next))
1906                 break;
1907             last = curr;
1908             curr = CYCastJSObject(context, next);
1909           next:
1910             next = JSObjectGetPrototype(context, curr);
1911         }
1912
1913         CYSetPrototype(context, last, all);
1914     }
1915
1916     CYSetProperty(context, global, CYJSString("$cyq"), &$cyq, kJSPropertyAttributeDontEnum);
1917
1918     JSObjectRef System(JSObjectMake(context, NULL, NULL));
1919     CYSetProperty(context, cy, CYJSString("System"), System);
1920
1921     CYSetProperty(context, all, CYJSString("require"), &require, kJSPropertyAttributeDontEnum);
1922
1923     CYSetProperty(context, global, CYJSString("system"), System);
1924     CYSetProperty(context, System, CYJSString("args"), CYJSNull(context));
1925     //CYSetProperty(context, System, CYJSString("global"), global);
1926     CYSetProperty(context, System, CYJSString("print"), &System_print);
1927
1928     if (CYBridgeEntry *entry = CYBridgeHash("1dlerror", 8))
1929         entry->cache_ = new cy::Functor(entry->value_, reinterpret_cast<void (*)()>(&dlerror));
1930
1931     for (CYHook *hook : GetHooks())
1932         if (hook->SetupContext != NULL)
1933             (*hook->SetupContext)(context);
1934
1935     CYArrayPush(context, alls, cycript);
1936 }
1937
1938 static JSGlobalContextRef context_;
1939
1940 JSGlobalContextRef CYGetJSContext() {
1941     CYInitializeDynamic();
1942
1943     if (context_ == NULL) {
1944         context_ = JSGlobalContextCreate(Global_);
1945         CYSetupContext(context_);
1946     }
1947
1948     return context_;
1949 }
1950
1951 void CYDestroyContext() {
1952     if (context_ == NULL)
1953         return;
1954     JSGlobalContextRelease(context_);
1955     context_ = NULL;
1956 }