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