Execute.cpp

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2013  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU General Public License, Version 3 {{{ */
   6 /*
   7  * Cycript is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published
   9  * by the Free Software Foundation, either version 3 of the License,
  10  * or (at your option) any later version.
  11  *
  12  * Cycript is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with Cycript.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 #include "Internal.hpp"
  23
  24 #include <dlfcn.h>
  25
  26 #include "cycript.hpp"
  27
  28 #include "sig/parse.hpp"
  29 #include "sig/ffi_type.hpp"
  30
  31 #include "Pooling.hpp"
  32 #include "Execute.hpp"
  33
  34 #include <sys/mman.h>
  35
  36 #include <iostream>
  37 #include <set>
  38 #include <map>
  39 #include <iomanip>
  40 #include <sstream>
  41 #include <cmath>
  42
  43 #include "Parser.hpp"
  44
  45 #include "Error.hpp"
  46 #include "JavaScript.hpp"
  47 #include "String.hpp"
  48
  49 struct CYHooks *hooks_;
  50
  51 /* JavaScript Properties {{{ */
  52 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, size_t index) {
  53     JSValueRef exception(NULL);
  54     JSValueRef value(JSObjectGetPropertyAtIndex(context, object, index, &exception));
  55     CYThrow(context, exception);
  56     return value;
  57 }
  58
  59 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, JSStringRef name) {
  60     JSValueRef exception(NULL);
  61     JSValueRef value(JSObjectGetProperty(context, object, name, &exception));
  62     CYThrow(context, exception);
  63     return value;
  64 }
  65
  66 void CYSetProperty(JSContextRef context, JSObjectRef object, size_t index, JSValueRef value) {
  67     JSValueRef exception(NULL);
  68     JSObjectSetPropertyAtIndex(context, object, index, value, &exception);
  69     CYThrow(context, exception);
  70 }
  71
  72 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef value, JSPropertyAttributes attributes) {
  73     JSValueRef exception(NULL);
  74     JSObjectSetProperty(context, object, name, value, attributes, &exception);
  75     CYThrow(context, exception);
  76 }
  77
  78 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef (*callback)(JSContextRef, JSObjectRef, JSObjectRef, size_t, const JSValueRef[], JSValueRef *), JSPropertyAttributes attributes) {
  79     CYSetProperty(context, object, name, JSObjectMakeFunctionWithCallback(context, name, callback), attributes);
  80 }
  81 /* }}} */
  82 /* JavaScript Strings {{{ */
  83 JSStringRef CYCopyJSString(const char *value) {
  84     return value == NULL ? NULL : JSStringCreateWithUTF8CString(value);
  85 }
  86
  87 JSStringRef CYCopyJSString(JSStringRef value) {
  88     return value == NULL ? NULL : JSStringRetain(value);
  89 }
  90
  91 JSStringRef CYCopyJSString(CYUTF8String value) {
  92     // XXX: this is very wrong; it needs to convert to UTF16 and then create from there
  93     return CYCopyJSString(value.data);
  94 }
  95
  96 JSStringRef CYCopyJSString(JSContextRef context, JSValueRef value) {
  97     if (JSValueIsNull(context, value))
  98         return NULL;
  99     JSValueRef exception(NULL);
 100     JSStringRef string(JSValueToStringCopy(context, value, &exception));
 101     CYThrow(context, exception);
 102     return string;
 103 }
 104
 105 static CYUTF16String CYCastUTF16String(JSStringRef value) {
 106     return CYUTF16String(JSStringGetCharactersPtr(value), JSStringGetLength(value));
 107 }
 108
 109 CYUTF8String CYPoolUTF8String(CYPool &pool, JSContextRef context, JSStringRef value) {
 110     return CYPoolUTF8String(pool, CYCastUTF16String(value));
 111 }
 112
 113 const char *CYPoolCString(CYPool &pool, JSContextRef context, JSStringRef value) {
 114     CYUTF8String utf8(CYPoolUTF8String(pool, context, value));
 115     _assert(memchr(utf8.data, '\0', utf8.size) == NULL);
 116     return utf8.data;
 117 }
 118
 119 const char *CYPoolCString(CYPool &pool, JSContextRef context, JSValueRef value) {
 120     return JSValueIsNull(context, value) ? NULL : CYPoolCString(pool, context, CYJSString(context, value));
 121 }
 122 /* }}} */
 123 /* Index Offsets {{{ */
 124 size_t CYGetIndex(CYPool &pool, JSContextRef context, JSStringRef value) {
 125     return CYGetIndex(CYPoolUTF8String(pool, context, value));
 126 }
 127 /* }}} */
 128
 129 static JSClassRef All_;
 130 static JSClassRef Context_;
 131 JSClassRef Functor_;
 132 static JSClassRef Global_;
 133 static JSClassRef Pointer_;
 134 static JSClassRef Struct_;
 135
 136 JSStringRef Array_s;
 137 JSStringRef cy_s;
 138 JSStringRef length_s;
 139 JSStringRef message_s;
 140 JSStringRef name_s;
 141 JSStringRef pop_s;
 142 JSStringRef prototype_s;
 143 JSStringRef push_s;
 144 JSStringRef splice_s;
 145 JSStringRef toCYON_s;
 146 JSStringRef toJSON_s;
 147 JSStringRef toPointer_s;
 148 JSStringRef toString_s;
 149
 150 static JSStringRef Result_;
 151
 152 void CYFinalize(JSObjectRef object) {
 153     CYData *internal(reinterpret_cast<CYData *>(JSObjectGetPrivate(object)));
 154     _assert(internal->count_ != _not(unsigned));
 155     if (--internal->count_ == 0)
 156         delete internal;
 157 }
 158
 159 void Structor_(CYPool &pool, sig::Type *&type) {
 160     if (
 161         type->primitive == sig::pointer_P &&
 162         type->data.data.type != NULL &&
 163         type->data.data.type->primitive == sig::struct_P &&
 164         type->data.data.type->name != NULL &&
 165         strcmp(type->data.data.type->name, "_objc_class") == 0
 166     ) {
 167         type->primitive = sig::typename_P;
 168         type->data.data.type = NULL;
 169         return;
 170     }
 171
 172     if (type->primitive != sig::struct_P || type->name == NULL)
 173         return;
 174
 175     size_t length(strlen(type->name));
 176     char keyed[length + 2];
 177     memcpy(keyed + 1, type->name, length + 1);
 178
 179     static const char *modes = "34";
 180     for (size_t i(0); i != 2; ++i) {
 181         char mode(modes[i]);
 182         keyed[0] = mode;
 183
 184         if (CYBridgeEntry *entry = CYBridgeHash(keyed, length + 1))
 185             switch (mode) {
 186                 case '3':
 187                     sig::Parse(pool, &type->data.signature, entry->value_, &Structor_);
 188                 break;
 189
 190                 case '4': {
 191                     sig::Signature signature;
 192                     sig::Parse(pool, &signature, entry->value_, &Structor_);
 193                     type = signature.elements[0].type;
 194                 } break;
 195             }
 196     }
 197 }
 198
 199 JSClassRef Type_privateData::Class_;
 200
 201 struct Context :
 202     CYData
 203 {
 204     JSGlobalContextRef context_;
 205
 206     Context(JSGlobalContextRef context) :
 207         context_(context)
 208     {
 209     }
 210 };
 211
 212 struct Pointer :
 213     CYOwned
 214 {
 215     Type_privateData *type_;
 216     size_t length_;
 217
 218     Pointer(void *value, JSContextRef context, JSObjectRef owner, size_t length, sig::Type *type) :
 219         CYOwned(value, context, owner),
 220         type_(new(*pool_) Type_privateData(type)),
 221         length_(length)
 222     {
 223     }
 224 };
 225
 226 struct Struct_privateData :
 227     CYOwned
 228 {
 229     Type_privateData *type_;
 230
 231     Struct_privateData(JSContextRef context, JSObjectRef owner) :
 232         CYOwned(NULL, context, owner)
 233     {
 234     }
 235 };
 236
 237 typedef std::map<const char *, Type_privateData *, CYCStringLess> TypeMap;
 238 static TypeMap Types_;
 239
 240 JSObjectRef CYMakeStruct(JSContextRef context, void *data, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 241     Struct_privateData *internal(new Struct_privateData(context, owner));
 242     CYPool &pool(*internal->pool_);
 243     Type_privateData *typical(new(pool) Type_privateData(type, ffi));
 244     internal->type_ = typical;
 245
 246     if (owner != NULL)
 247         internal->value_ = data;
 248     else {
 249         size_t size(typical->GetFFI()->size);
 250         void *copy(internal->pool_->malloc<void>(size));
 251         memcpy(copy, data, size);
 252         internal->value_ = copy;
 253     }
 254
 255     return JSObjectMake(context, Struct_, internal);
 256 }
 257
 258 static void *CYCastSymbol(const char *name) {
 259     return dlsym(RTLD_DEFAULT, name);
 260 }
 261
 262 JSValueRef CYCastJSValue(JSContextRef context, bool value) {
 263     return JSValueMakeBoolean(context, value);
 264 }
 265
 266 JSValueRef CYCastJSValue(JSContextRef context, double value) {
 267     return JSValueMakeNumber(context, value);
 268 }
 269
 270 #define CYCastJSValue_(Type_) \
 271     JSValueRef CYCastJSValue(JSContextRef context, Type_ value) { \
 272         return JSValueMakeNumber(context, static_cast<double>(value)); \
 273     }
 274
 275 CYCastJSValue_(int)
 276 CYCastJSValue_(unsigned int)
 277 CYCastJSValue_(long int)
 278 CYCastJSValue_(long unsigned int)
 279 CYCastJSValue_(long long int)
 280 CYCastJSValue_(long long unsigned int)
 281
 282 JSValueRef CYJSUndefined(JSContextRef context) {
 283     return JSValueMakeUndefined(context);
 284 }
 285
 286 double CYCastDouble(JSContextRef context, JSValueRef value) {
 287     JSValueRef exception(NULL);
 288     double number(JSValueToNumber(context, value, &exception));
 289     CYThrow(context, exception);
 290     return number;
 291 }
 292
 293 bool CYCastBool(JSContextRef context, JSValueRef value) {
 294     return JSValueToBoolean(context, value);
 295 }
 296
 297 JSValueRef CYJSNull(JSContextRef context) {
 298     return JSValueMakeNull(context);
 299 }
 300
 301 JSValueRef CYCastJSValue(JSContextRef context, JSStringRef value) {
 302     return value == NULL ? CYJSNull(context) : JSValueMakeString(context, value);
 303 }
 304
 305 JSValueRef CYCastJSValue(JSContextRef context, const char *value) {
 306     return CYCastJSValue(context, CYJSString(value));
 307 }
 308
 309 JSObjectRef CYCastJSObject(JSContextRef context, JSValueRef value) {
 310     JSValueRef exception(NULL);
 311     JSObjectRef object(JSValueToObject(context, value, &exception));
 312     CYThrow(context, exception);
 313     return object;
 314 }
 315
 316 JSValueRef CYCallAsFunction(JSContextRef context, JSObjectRef function, JSObjectRef _this, size_t count, const JSValueRef arguments[]) {
 317     JSValueRef exception(NULL);
 318     JSValueRef value(JSObjectCallAsFunction(context, function, _this, count, arguments, &exception));
 319     CYThrow(context, exception);
 320     return value;
 321 }
 322
 323 bool CYIsCallable(JSContextRef context, JSValueRef value) {
 324     return value != NULL && JSValueIsObject(context, value) && JSObjectIsFunction(context, (JSObjectRef) value);
 325 }
 326
 327 size_t CYArrayLength(JSContextRef context, JSObjectRef array) {
 328     return CYCastDouble(context, CYGetProperty(context, array, length_s));
 329 }
 330
 331 JSValueRef CYArrayGet(JSContextRef context, JSObjectRef array, size_t index) {
 332     JSValueRef exception(NULL);
 333     JSValueRef value(JSObjectGetPropertyAtIndex(context, array, index, &exception));
 334     CYThrow(context, exception);
 335     return value;
 336 }
 337
 338 void CYArrayPush(JSContextRef context, JSObjectRef array, JSValueRef value) {
 339     JSValueRef exception(NULL);
 340     JSValueRef arguments[1];
 341     arguments[0] = value;
 342     JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array_prototype")));
 343     JSObjectCallAsFunction(context, CYCastJSObject(context, CYGetProperty(context, Array, push_s)), array, 1, arguments, &exception);
 344     CYThrow(context, exception);
 345 }
 346
 347 static JSValueRef System_print(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 348     if (count == 0)
 349         printf("\n");
 350     else {
 351         CYPool pool;
 352         printf("%s\n", CYPoolCString(pool, context, arguments[0]));
 353     }
 354
 355     return CYJSUndefined(context);
 356 } CYCatch(NULL) }
 357
 358 static size_t Nonce_(0);
 359
 360 static JSValueRef $cyq(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 361     CYPool pool;
 362     const char *name(pool.strcat(CYPoolCString(pool, context, arguments[0]), pool.itoa(Nonce_++), NULL));
 363     return CYCastJSValue(context, name);
 364 }
 365
 366 static JSValueRef Cycript_gc_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 367     JSGarbageCollect(context);
 368     return CYJSUndefined(context);
 369 }
 370
 371 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSValueRef value, JSValueRef *exception) { CYTry {
 372     switch (JSType type = JSValueGetType(context, value)) {
 373         case kJSTypeUndefined:
 374             return "undefined";
 375         case kJSTypeNull:
 376             return "null";
 377         case kJSTypeBoolean:
 378             return CYCastBool(context, value) ? "true" : "false";
 379
 380         case kJSTypeNumber: {
 381             std::ostringstream str;
 382             CYNumerify(str, CYCastDouble(context, value));
 383             std::string value(str.str());
 384             return pool.strmemdup(value.c_str(), value.size());
 385         } break;
 386
 387         case kJSTypeString: {
 388             std::ostringstream str;
 389             CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, value)));
 390             CYStringify(str, string.data, string.size);
 391             std::string value(str.str());
 392             return pool.strmemdup(value.c_str(), value.size());
 393         } break;
 394
 395         case kJSTypeObject:
 396             return CYPoolCCYON(pool, context, (JSObjectRef) value);
 397         default:
 398             throw CYJSError(context, "JSValueGetType() == 0x%x", type);
 399     }
 400 } CYCatch(NULL) }
 401
 402 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSValueRef value) {
 403     JSValueRef exception(NULL);
 404     const char *cyon(CYPoolCCYON(pool, context, value, &exception));
 405     CYThrow(context, exception);
 406     return cyon;
 407 }
 408
 409 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSObjectRef object) {
 410     JSValueRef toCYON(CYGetProperty(context, object, toCYON_s));
 411     if (CYIsCallable(context, toCYON)) {
 412         JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toCYON, object, 0, NULL));
 413         _assert(value != NULL);
 414         return CYPoolCString(pool, context, value);
 415     }
 416
 417     JSValueRef toJSON(CYGetProperty(context, object, toJSON_s));
 418     if (CYIsCallable(context, toJSON)) {
 419         JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 420         JSValueRef exception(NULL);
 421         const char *cyon(CYPoolCCYON(pool, context, CYCallAsFunction(context, (JSObjectRef) toJSON, object, 1, arguments), &exception));
 422         CYThrow(context, exception);
 423         return cyon;
 424     }
 425
 426     if (JSObjectIsFunction(context, object)) {
 427         JSValueRef toString(CYGetProperty(context, object, toString_s));
 428         if (CYIsCallable(context, toString)) {
 429             JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 430             JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toString, object, 1, arguments));
 431             _assert(value != NULL);
 432             return CYPoolCString(pool, context, value);
 433         }
 434     }
 435
 436     std::ostringstream str;
 437
 438     str << '{';
 439
 440     // XXX: this is, sadly, going to leak
 441     JSPropertyNameArrayRef names(JSObjectCopyPropertyNames(context, object));
 442
 443     bool comma(false);
 444
 445     for (size_t index(0), count(JSPropertyNameArrayGetCount(names)); index != count; ++index) {
 446         JSStringRef name(JSPropertyNameArrayGetNameAtIndex(names, index));
 447         JSValueRef value(CYGetProperty(context, object, name));
 448
 449         if (comma)
 450             str << ',';
 451         else
 452             comma = true;
 453
 454         CYUTF8String string(CYPoolUTF8String(pool, context, name));
 455         if (CYIsKey(string))
 456             str << string.data;
 457         else
 458             CYStringify(str, string.data, string.size);
 459
 460         str << ':' << CYPoolCCYON(pool, context, value);
 461     }
 462
 463     str << '}';
 464
 465     JSPropertyNameArrayRelease(names);
 466
 467     std::string string(str.str());
 468     return pool.strmemdup(string.c_str(), string.size());
 469 }
 470
 471 static JSValueRef Array_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 472     CYPool pool;
 473     std::ostringstream str;
 474
 475     str << '[';
 476
 477     JSValueRef length(CYGetProperty(context, _this, length_s));
 478     bool comma(false);
 479
 480     for (size_t index(0), count(CYCastDouble(context, length)); index != count; ++index) {
 481         JSValueRef value(CYGetProperty(context, _this, index));
 482
 483         if (comma)
 484             str << ',';
 485         else
 486             comma = true;
 487
 488         if (!JSValueIsUndefined(context, value))
 489             str << CYPoolCCYON(pool, context, value);
 490         else {
 491             str << ',';
 492             comma = false;
 493         }
 494     }
 495
 496     str << ']';
 497
 498     std::string value(str.str());
 499     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 500 } CYCatch(NULL) }
 501
 502 static JSValueRef String_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 503     CYPool pool;
 504     std::ostringstream str;
 505
 506     CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, _this)));
 507     CYStringify(str, string.data, string.size);
 508
 509     std::string value(str.str());
 510     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 511 } CYCatch(NULL) }
 512
 513 JSObjectRef CYMakePointer(JSContextRef context, void *pointer, size_t length, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 514     Pointer *internal(new Pointer(pointer, context, owner, length, type));
 515     return JSObjectMake(context, Pointer_, internal);
 516 }
 517
 518 static JSObjectRef CYMakeFunctor(JSContextRef context, void (*function)(), const char *type) {
 519     return JSObjectMake(context, Functor_, new cy::Functor(type, function));
 520 }
 521
 522 static JSObjectRef CYMakeFunctor(JSContextRef context, const char *symbol, const char *type, void **cache) {
 523     cy::Functor *internal;
 524     if (*cache != NULL)
 525         internal = reinterpret_cast<cy::Functor *>(*cache);
 526     else {
 527         void (*function)()(reinterpret_cast<void (*)()>(CYCastSymbol(symbol)));
 528         if (function == NULL)
 529             return NULL;
 530
 531         internal = new cy::Functor(type, function);
 532         *cache = internal;
 533     }
 534
 535     ++internal->count_;
 536     return JSObjectMake(context, Functor_, internal);
 537 }
 538
 539 static bool CYGetOffset(CYPool &pool, JSContextRef context, JSStringRef value, ssize_t &index) {
 540     return CYGetOffset(CYPoolCString(pool, context, value), index);
 541 }
 542
 543 void *CYCastPointer_(JSContextRef context, JSValueRef value) {
 544     switch (JSValueGetType(context, value)) {
 545         case kJSTypeNull:
 546             return NULL;
 547         case kJSTypeObject: {
 548             JSObjectRef object((JSObjectRef) value);
 549             if (JSValueIsObjectOfClass(context, value, Pointer_)) {
 550                 Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 551                 return internal->value_;
 552             }
 553             JSValueRef toPointer(CYGetProperty(context, object, toPointer_s));
 554             if (CYIsCallable(context, toPointer)) {
 555                 JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toPointer, object, 0, NULL));
 556                 _assert(value != NULL);
 557                 return CYCastPointer_(context, value);
 558             }
 559         } default:
 560             double number(CYCastDouble(context, value));
 561             if (std::isnan(number))
 562                 throw CYJSError(context, "cannot convert value to pointer");
 563             return reinterpret_cast<void *>(static_cast<uintptr_t>(static_cast<long long>(number)));
 564     }
 565 }
 566
 567 void CYPoolFFI(CYPool *pool, JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, JSValueRef value) {
 568     switch (type->primitive) {
 569         case sig::boolean_P:
 570             *reinterpret_cast<bool *>(data) = JSValueToBoolean(context, value);
 571         break;
 572
 573 #define CYPoolFFI_(primitive, native) \
 574         case sig::primitive ## _P: \
 575             *reinterpret_cast<native *>(data) = CYCastDouble(context, value); \
 576         break;
 577
 578         CYPoolFFI_(uchar, unsigned char)
 579         CYPoolFFI_(char, char)
 580         CYPoolFFI_(ushort, unsigned short)
 581         CYPoolFFI_(short, short)
 582         CYPoolFFI_(ulong, unsigned long)
 583         CYPoolFFI_(long, long)
 584         CYPoolFFI_(uint, unsigned int)
 585         CYPoolFFI_(int, int)
 586         CYPoolFFI_(ulonglong, unsigned long long)
 587         CYPoolFFI_(longlong, long long)
 588         CYPoolFFI_(float, float)
 589         CYPoolFFI_(double, double)
 590
 591         case sig::array_P: {
 592             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 593             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 594             for (size_t index(0); index != type->data.data.size; ++index) {
 595                 ffi_type *field(ffi->elements[index]);
 596
 597                 JSValueRef rhs;
 598                 if (aggregate == NULL)
 599                     rhs = value;
 600                 else {
 601                     rhs = CYGetProperty(context, aggregate, index);
 602                     if (JSValueIsUndefined(context, rhs))
 603                         throw CYJSError(context, "unable to extract array value");
 604                 }
 605
 606                 CYPoolFFI(pool, context, type->data.data.type, field, base, rhs);
 607                 // XXX: alignment?
 608                 base += field->size;
 609             }
 610         } break;
 611
 612         case sig::pointer_P:
 613             *reinterpret_cast<void **>(data) = CYCastPointer<void *>(context, value);
 614         break;
 615
 616         case sig::string_P:
 617             _assert(pool != NULL);
 618             *reinterpret_cast<const char **>(data) = CYPoolCString(*pool, context, value);
 619         break;
 620
 621         case sig::struct_P: {
 622             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 623             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 624             for (size_t index(0); index != type->data.signature.count; ++index) {
 625                 sig::Element *element(&type->data.signature.elements[index]);
 626                 ffi_type *field(ffi->elements[index]);
 627
 628                 JSValueRef rhs;
 629                 if (aggregate == NULL)
 630                     rhs = value;
 631                 else {
 632                     rhs = CYGetProperty(context, aggregate, index);
 633                     if (JSValueIsUndefined(context, rhs)) {
 634                         if (element->name != NULL)
 635                             rhs = CYGetProperty(context, aggregate, CYJSString(element->name));
 636                         else
 637                             goto undefined;
 638                         if (JSValueIsUndefined(context, rhs)) undefined:
 639                             throw CYJSError(context, "unable to extract structure value");
 640                     }
 641                 }
 642
 643                 CYPoolFFI(pool, context, element->type, field, base, rhs);
 644                 // XXX: alignment?
 645                 base += field->size;
 646             }
 647         } break;
 648
 649         case sig::void_P:
 650         break;
 651
 652         default:
 653             if (hooks_ != NULL && hooks_->PoolFFI != NULL)
 654                 if ((*hooks_->PoolFFI)(pool, context, type, ffi, data, value))
 655                     return;
 656
 657             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 658     }
 659 }
 660
 661 JSValueRef CYFromFFI(JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, bool initialize, JSObjectRef owner) {
 662     switch (type->primitive) {
 663         case sig::boolean_P:
 664             return CYCastJSValue(context, *reinterpret_cast<bool *>(data));
 665
 666 #define CYFromFFI_(primitive, native) \
 667         case sig::primitive ## _P: \
 668             return CYCastJSValue(context, *reinterpret_cast<native *>(data)); \
 669
 670         CYFromFFI_(uchar, unsigned char)
 671         CYFromFFI_(char, char)
 672         CYFromFFI_(ushort, unsigned short)
 673         CYFromFFI_(short, short)
 674         CYFromFFI_(ulong, unsigned long)
 675         CYFromFFI_(long, long)
 676         CYFromFFI_(uint, unsigned int)
 677         CYFromFFI_(int, int)
 678         CYFromFFI_(ulonglong, unsigned long long)
 679         CYFromFFI_(longlong, long long)
 680         CYFromFFI_(float, float)
 681         CYFromFFI_(double, double)
 682
 683         case sig::array_P:
 684             if (void *pointer = data)
 685                 return CYMakePointer(context, pointer, type->data.data.size, type->data.data.type, NULL, owner);
 686             else goto null;
 687
 688         case sig::pointer_P:
 689             if (void *pointer = *reinterpret_cast<void **>(data))
 690                 return CYMakePointer(context, pointer, _not(size_t), type->data.data.type, NULL, owner);
 691             else goto null;
 692
 693         case sig::string_P:
 694             if (char *utf8 = *reinterpret_cast<char **>(data))
 695                 return CYCastJSValue(context, utf8);
 696             else goto null;
 697
 698         case sig::struct_P:
 699             return CYMakeStruct(context, data, type, ffi, owner);
 700         case sig::void_P:
 701             return CYJSUndefined(context);
 702
 703         null:
 704             return CYJSNull(context);
 705         default:
 706             if (hooks_ != NULL && hooks_->FromFFI != NULL)
 707                 if (JSValueRef value = (*hooks_->FromFFI)(context, type, ffi, data, initialize, owner))
 708                     return value;
 709
 710             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 711     }
 712 }
 713
 714 void CYExecuteClosure(ffi_cif *cif, void *result, void **arguments, void *arg, JSValueRef (*adapter)(JSContextRef, size_t, JSValueRef[], JSObjectRef)) {
 715     Closure_privateData *internal(reinterpret_cast<Closure_privateData *>(arg));
 716
 717     JSContextRef context(internal->context_);
 718
 719     size_t count(internal->cif_.nargs);
 720     JSValueRef values[count];
 721
 722     for (size_t index(0); index != count; ++index)
 723         values[index] = CYFromFFI(context, internal->signature_.elements[1 + index].type, internal->cif_.arg_types[index], arguments[index]);
 724
 725     JSValueRef value(adapter(context, count, values, internal->function_));
 726     CYPoolFFI(NULL, context, internal->signature_.elements[0].type, internal->cif_.rtype, result, value);
 727 }
 728
 729 static JSValueRef FunctionAdapter_(JSContextRef context, size_t count, JSValueRef values[], JSObjectRef function) {
 730     return CYCallAsFunction(context, function, NULL, count, values);
 731 }
 732
 733 static void FunctionClosure_(ffi_cif *cif, void *result, void **arguments, void *arg) {
 734     CYExecuteClosure(cif, result, arguments, arg, &FunctionAdapter_);
 735 }
 736
 737 Closure_privateData *CYMakeFunctor_(JSContextRef context, JSObjectRef function, const char *type, void (*callback)(ffi_cif *, void *, void **, void *)) {
 738     // XXX: in case of exceptions this will leak
 739     // XXX: in point of fact, this may /need/ to leak :(
 740     Closure_privateData *internal(new Closure_privateData(context, function, type));
 741
 742 #if defined(__APPLE__) && defined(__arm__)
 743     void *executable;
 744     ffi_closure *writable(reinterpret_cast<ffi_closure *>(ffi_closure_alloc(sizeof(ffi_closure), &executable)));
 745
 746     ffi_status status(ffi_prep_closure_loc(writable, &internal->cif_, callback, internal, executable));
 747     _assert(status == FFI_OK);
 748
 749     internal->value_ = executable;
 750 #else
 751     ffi_closure *closure((ffi_closure *) _syscall(mmap(
 752         NULL, sizeof(ffi_closure),
 753         PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE,
 754         -1, 0
 755     )));
 756
 757     ffi_status status(ffi_prep_closure(closure, &internal->cif_, callback, internal));
 758     _assert(status == FFI_OK);
 759
 760     _syscall(mprotect(closure, sizeof(*closure), PROT_READ | PROT_EXEC));
 761
 762     internal->value_ = closure;
 763 #endif
 764
 765     return internal;
 766 }
 767
 768 static JSObjectRef CYMakeFunctor(JSContextRef context, JSObjectRef function, const char *type) {
 769     Closure_privateData *internal(CYMakeFunctor_(context, function, type, &FunctionClosure_));
 770     JSObjectRef object(JSObjectMake(context, Functor_, internal));
 771     // XXX: see above notes about needing to leak
 772     JSValueProtect(CYGetJSContext(context), object);
 773     return object;
 774 }
 775
 776 JSObjectRef CYGetCachedObject(JSContextRef context, JSStringRef name) {
 777     return CYCastJSObject(context, CYGetProperty(context, CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s)), name));
 778 }
 779
 780 static JSObjectRef CYMakeFunctor(JSContextRef context, JSValueRef value, const char *type) {
 781     JSObjectRef Function(CYGetCachedObject(context, CYJSString("Function")));
 782
 783     JSValueRef exception(NULL);
 784     bool function(JSValueIsInstanceOfConstructor(context, value, Function, &exception));
 785     CYThrow(context, exception);
 786
 787     if (function) {
 788         JSObjectRef function(CYCastJSObject(context, value));
 789         return CYMakeFunctor(context, function, type);
 790     } else {
 791         void (*function)()(CYCastPointer<void (*)()>(context, value));
 792         return CYMakeFunctor(context, function, type);
 793     }
 794 }
 795
 796 static bool Index_(CYPool &pool, JSContextRef context, Struct_privateData *internal, JSStringRef property, ssize_t &index, uint8_t *&base) {
 797     Type_privateData *typical(internal->type_);
 798     sig::Type *type(typical->type_);
 799     if (type == NULL)
 800         return false;
 801
 802     const char *name(CYPoolCString(pool, context, property));
 803     size_t length(strlen(name));
 804     double number(CYCastDouble(name, length));
 805
 806     size_t count(type->data.signature.count);
 807
 808     if (std::isnan(number)) {
 809         if (property == NULL)
 810             return false;
 811
 812         sig::Element *elements(type->data.signature.elements);
 813
 814         for (size_t local(0); local != count; ++local) {
 815             sig::Element *element(&elements[local]);
 816             if (element->name != NULL && strcmp(name, element->name) == 0) {
 817                 index = local;
 818                 goto base;
 819             }
 820         }
 821
 822         return false;
 823     } else {
 824         index = static_cast<ssize_t>(number);
 825         if (index != number || index < 0 || static_cast<size_t>(index) >= count)
 826             return false;
 827     }
 828
 829   base:
 830     ffi_type **elements(typical->GetFFI()->elements);
 831
 832     base = reinterpret_cast<uint8_t *>(internal->value_);
 833     for (ssize_t local(0); local != index; ++local)
 834         base += elements[local]->size;
 835
 836     return true;
 837 }
 838
 839 static JSValueRef Pointer_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 840     CYPool pool;
 841     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 842
 843     if (JSStringIsEqual(property, length_s))
 844         return internal->length_ == _not(size_t) ? CYJSUndefined(context) : CYCastJSValue(context, internal->length_);
 845
 846     Type_privateData *typical(internal->type_);
 847
 848     if (typical->type_ == NULL)
 849         return NULL;
 850
 851     ssize_t offset;
 852     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 853         offset = 0;
 854     else if (!CYGetOffset(pool, context, property, offset))
 855         return NULL;
 856
 857     ffi_type *ffi(typical->GetFFI());
 858
 859     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 860     base += ffi->size * offset;
 861
 862     JSObjectRef owner(internal->GetOwner() ?: object);
 863     return CYFromFFI(context, typical->type_, ffi, base, false, owner);
 864 } CYCatch(NULL) }
 865
 866 static bool Pointer_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 867     CYPool pool;
 868     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 869     Type_privateData *typical(internal->type_);
 870
 871     if (typical->type_ == NULL)
 872         return false;
 873
 874     ssize_t offset;
 875     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 876         offset = 0;
 877     else if (!CYGetOffset(pool, context, property, offset))
 878         return false;
 879
 880     ffi_type *ffi(typical->GetFFI());
 881
 882     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 883     base += ffi->size * offset;
 884
 885     CYPoolFFI(NULL, context, typical->type_, ffi, base, value);
 886     return true;
 887 } CYCatch(false) }
 888
 889 static JSValueRef Struct_callAsFunction_$cya(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 890     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(_this)));
 891     Type_privateData *typical(internal->type_);
 892     return CYMakePointer(context, internal->value_, _not(size_t), typical->type_, typical->ffi_, _this);
 893 }
 894
 895 static JSValueRef Struct_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 896     CYPool pool;
 897     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 898     Type_privateData *typical(internal->type_);
 899
 900     ssize_t index;
 901     uint8_t *base;
 902
 903     if (!Index_(pool, context, internal, property, index, base))
 904         return NULL;
 905
 906     JSObjectRef owner(internal->GetOwner() ?: object);
 907
 908     return CYFromFFI(context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, false, owner);
 909 } CYCatch(NULL) }
 910
 911 static bool Struct_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 912     CYPool pool;
 913     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 914     Type_privateData *typical(internal->type_);
 915
 916     ssize_t index;
 917     uint8_t *base;
 918
 919     if (!Index_(pool, context, internal, property, index, base))
 920         return false;
 921
 922     CYPoolFFI(NULL, context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, value);
 923     return true;
 924 } CYCatch(false) }
 925
 926 static void Struct_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
 927     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 928     Type_privateData *typical(internal->type_);
 929     sig::Type *type(typical->type_);
 930
 931     if (type == NULL)
 932         return;
 933
 934     size_t count(type->data.signature.count);
 935     sig::Element *elements(type->data.signature.elements);
 936
 937     char number[32];
 938
 939     for (size_t index(0); index != count; ++index) {
 940         const char *name;
 941         name = elements[index].name;
 942
 943         if (name == NULL) {
 944             sprintf(number, "%zu", index);
 945             name = number;
 946         }
 947
 948         JSPropertyNameAccumulatorAddName(names, CYJSString(name));
 949     }
 950 }
 951
 952 JSValueRef CYCallFunction(CYPool &pool, JSContextRef context, size_t setups, void *setup[], size_t count, const JSValueRef arguments[], bool initialize, JSValueRef *exception, sig::Signature *signature, ffi_cif *cif, void (*function)()) { CYTry {
 953     if (setups + count != signature->count - 1)
 954         throw CYJSError(context, "incorrect number of arguments to ffi function");
 955
 956     size_t size(setups + count);
 957     void *values[size];
 958     memcpy(values, setup, sizeof(void *) * setups);
 959
 960     for (size_t index(setups); index != size; ++index) {
 961         sig::Element *element(&signature->elements[index + 1]);
 962         ffi_type *ffi(cif->arg_types[index]);
 963         // XXX: alignment?
 964         values[index] = new(pool) uint8_t[ffi->size];
 965         CYPoolFFI(&pool, context, element->type, ffi, values[index], arguments[index - setups]);
 966     }
 967
 968     uint8_t value[cif->rtype->size];
 969
 970     if (hooks_ != NULL && hooks_->CallFunction != NULL)
 971         (*hooks_->CallFunction)(context, cif, function, value, values);
 972     else
 973         ffi_call(cif, function, value, values);
 974
 975     return CYFromFFI(context, signature->elements[0].type, cif->rtype, value, initialize);
 976 } CYCatch(NULL) }
 977
 978 static JSValueRef Functor_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 979     CYPool pool;
 980     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
 981     return CYCallFunction(pool, context, 0, NULL, count, arguments, false, exception, &internal->signature_, &internal->cif_, internal->GetValue());
 982 }
 983
 984 JSObjectRef CYMakeType(JSContextRef context, const char *type) {
 985     Type_privateData *internal(new Type_privateData(type));
 986     return JSObjectMake(context, Type_privateData::Class_, internal);
 987 }
 988
 989 JSObjectRef CYMakeType(JSContextRef context, sig::Type *type) {
 990     Type_privateData *internal(new Type_privateData(type));
 991     return JSObjectMake(context, Type_privateData::Class_, internal);
 992 }
 993
 994 static JSValueRef All_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 995     JSObjectRef global(CYGetGlobalObject(context));
 996     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
 997     JSObjectRef alls(CYCastJSObject(context, CYGetProperty(context, cycript, CYJSString("alls"))));
 998
 999     for (size_t i(0), count(CYArrayLength(context, alls)); i != count; ++i)
1000         if (JSObjectRef space = CYCastJSObject(context, CYArrayGet(context, alls, count - i - 1)))
1001             if (JSValueRef value = CYGetProperty(context, space, property))
1002                 if (!JSValueIsUndefined(context, value))
1003                     return value;
1004
1005     CYPool pool;
1006     CYUTF8String name(CYPoolUTF8String(pool, context, property));
1007
1008     size_t length(name.size);
1009     char keyed[length + 2];
1010     memcpy(keyed + 1, name.data, length + 1);
1011
1012     static const char *modes = "0124";
1013     for (size_t i(0); i != 4; ++i) {
1014         char mode(modes[i]);
1015         keyed[0] = mode;
1016
1017         if (CYBridgeEntry *entry = CYBridgeHash(keyed, length + 1))
1018             switch (mode) {
1019                 case '0':
1020                     return JSEvaluateScript(CYGetJSContext(context), CYJSString(entry->value_), NULL, NULL, 0, NULL);
1021
1022                 case '1':
1023                     return CYMakeFunctor(context, name.data, entry->value_, &entry->cache_);
1024
1025                 case '2':
1026                     if (void *symbol = CYCastSymbol(name.data)) {
1027                         // XXX: this is horrendously inefficient
1028                         sig::Signature signature;
1029                         sig::Parse(pool, &signature, entry->value_, &Structor_);
1030                         ffi_cif cif;
1031                         sig::sig_ffi_cif(pool, &sig::ObjectiveC, &signature, &cif);
1032                         return CYFromFFI(context, signature.elements[0].type, cif.rtype, symbol);
1033                     } else return NULL;
1034
1035                 // XXX: implement case 3
1036                 case '4':
1037                     return CYMakeType(context, entry->value_);
1038             }
1039     }
1040
1041     return NULL;
1042 } CYCatch(NULL) }
1043
1044 static void All_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
1045     JSObjectRef global(CYGetGlobalObject(context));
1046     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
1047     JSObjectRef alls(CYCastJSObject(context, CYGetProperty(context, cycript, CYJSString("alls"))));
1048
1049     for (size_t i(0), count(CYArrayLength(context, alls)); i != count; ++i)
1050         if (JSObjectRef space = CYCastJSObject(context, CYArrayGet(context, alls, count - i - 1))) {
1051             JSPropertyNameArrayRef subset(JSObjectCopyPropertyNames(context, space));
1052             for (size_t index(0), count(JSPropertyNameArrayGetCount(subset)); index != count; ++index)
1053                 JSPropertyNameAccumulatorAddName(names, JSPropertyNameArrayGetNameAtIndex(subset, index));
1054             JSPropertyNameArrayRelease(subset);
1055         }
1056 }
1057
1058 static JSObjectRef Pointer_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1059     if (count != 2)
1060         throw CYJSError(context, "incorrect number of arguments to Pointer constructor");
1061
1062     CYPool pool;
1063
1064     void *value(CYCastPointer<void *>(context, arguments[0]));
1065     const char *type(CYPoolCString(pool, context, arguments[1]));
1066
1067     sig::Signature signature;
1068     sig::Parse(pool, &signature, type, &Structor_);
1069
1070     return CYMakePointer(context, value, _not(size_t), signature.elements[0].type, NULL, NULL);
1071 } CYCatch(NULL) }
1072
1073 static JSObjectRef Type_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1074     if (count != 1)
1075         throw CYJSError(context, "incorrect number of arguments to Type constructor");
1076     CYPool pool;
1077     const char *type(CYPoolCString(pool, context, arguments[0]));
1078     return CYMakeType(context, type);
1079 } CYCatch(NULL) }
1080
1081 static JSValueRef Type_callAsFunction_arrayOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1082     if (count != 1)
1083         throw CYJSError(context, "incorrect number of arguments to Type.arrayOf");
1084     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1085
1086     CYPool pool;
1087     size_t index(CYGetIndex(pool, context, CYJSString(context, arguments[0])));
1088     if (index == _not(size_t))
1089         throw CYJSError(context, "invalid array size used with Type.arrayOf");
1090
1091     sig::Type type;
1092     type.name = NULL;
1093     type.flags = 0;
1094
1095     type.primitive = sig::array_P;
1096     type.data.data.type = internal->type_;
1097     type.data.data.size = index;
1098
1099     return CYMakeType(context, &type);
1100 } CYCatch(NULL) }
1101
1102 static JSValueRef Type_callAsFunction_constant(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1103     if (count != 0)
1104         throw CYJSError(context, "incorrect number of arguments to Type.constant");
1105     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1106
1107     sig::Type type(*internal->type_);
1108     type.flags |= JOC_TYPE_CONST;
1109     return CYMakeType(context, &type);
1110 } CYCatch(NULL) }
1111
1112 static JSValueRef Type_callAsFunction_pointerTo(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1113     if (count != 0)
1114         throw CYJSError(context, "incorrect number of arguments to Type.pointerTo");
1115     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1116
1117     sig::Type type;
1118     type.name = NULL;
1119     type.flags = 0;
1120
1121     type.primitive = sig::pointer_P;
1122     type.data.data.type = internal->type_;
1123     type.data.data.size = 0;
1124
1125     return CYMakeType(context, &type);
1126 } CYCatch(NULL) }
1127
1128 static JSValueRef Type_callAsFunction_withName(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1129     if (count != 1)
1130         throw CYJSError(context, "incorrect number of arguments to Type.withName");
1131     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1132
1133     CYPool pool;
1134     const char *name(CYPoolCString(pool, context, arguments[0]));
1135
1136     sig::Type type(*internal->type_);
1137     type.name = name;
1138     return CYMakeType(context, &type);
1139 } CYCatch(NULL) }
1140
1141 static JSValueRef Type_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1142     if (count != 1)
1143         throw CYJSError(context, "incorrect number of arguments to type cast function");
1144     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1145
1146     sig::Type *type(internal->type_);
1147     ffi_type *ffi(internal->GetFFI());
1148     // XXX: alignment?
1149     uint8_t value[ffi->size];
1150     CYPool pool;
1151     CYPoolFFI(&pool, context, type, ffi, value, arguments[0]);
1152     return CYFromFFI(context, type, ffi, value);
1153 } CYCatch(NULL) }
1154
1155 static JSObjectRef Type_callAsConstructor(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1156     if (count != 0)
1157         throw CYJSError(context, "incorrect number of arguments to Type allocator");
1158     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1159
1160     sig::Type *type(internal->type_);
1161     size_t length;
1162
1163     if (type->primitive != sig::array_P)
1164         length = _not(size_t);
1165     else {
1166         length = type->data.data.size;
1167         type = type->data.data.type;
1168     }
1169
1170     void *value(malloc(internal->GetFFI()->size));
1171     return CYMakePointer(context, value, length, type, NULL, NULL);
1172 } CYCatch(NULL) }
1173
1174 static JSObjectRef Functor_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1175     if (count != 2)
1176         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1177     CYPool pool;
1178     const char *type(CYPoolCString(pool, context, arguments[1]));
1179     return CYMakeFunctor(context, arguments[0], type);
1180 } CYCatch(NULL) }
1181
1182 static JSValueRef CYValue_callAsFunction_valueOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1183     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1184     return CYCastJSValue(context, reinterpret_cast<uintptr_t>(internal->value_));
1185 } CYCatch(NULL) }
1186
1187 static JSValueRef CYValue_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1188     return CYValue_callAsFunction_valueOf(context, object, _this, count, arguments, exception);
1189 }
1190
1191 static JSValueRef CYValue_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1192     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1193     char string[32];
1194     sprintf(string, "%p", internal->value_);
1195     return CYCastJSValue(context, string);
1196 } CYCatch(NULL) }
1197
1198 static JSValueRef Pointer_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1199     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(_this)));
1200     if (internal->length_ != _not(size_t)) {
1201         JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array_prototype")));
1202         JSObjectRef toCYON(CYCastJSObject(context, CYGetProperty(context, Array, toCYON_s)));
1203         return CYCallAsFunction(context, toCYON, _this, count, arguments);
1204     } else {
1205         char string[32];
1206         sprintf(string, "%p", internal->value_);
1207         return CYCastJSValue(context, string);
1208     }
1209 } CYCatch(NULL) }
1210
1211 static JSValueRef Functor_getProperty_type(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) {
1212     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
1213     CYPool pool;
1214     return CYCastJSValue(context, Unparse(pool, &internal->signature_));
1215 }
1216
1217 static JSValueRef Type_getProperty_alignment(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) {
1218     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1219     return CYCastJSValue(context, internal->GetFFI()->alignment);
1220 }
1221
1222 static JSValueRef Type_getProperty_name(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) {
1223     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1224     return CYCastJSValue(context, internal->type_->name);
1225 }
1226
1227 static JSValueRef Type_getProperty_size(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) {
1228     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1229     return CYCastJSValue(context, internal->GetFFI()->size);
1230 }
1231
1232 static JSValueRef Type_callAsFunction_toString(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1233     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1234     CYPool pool;
1235     const char *type(sig::Unparse(pool, internal->type_));
1236     return CYCastJSValue(context, CYJSString(type));
1237 } CYCatch(NULL) }
1238
1239 static JSValueRef Type_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1240     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1241     CYPool pool;
1242     const char *type(sig::Unparse(pool, internal->type_));
1243     std::ostringstream str;
1244     CYStringify(str, type, strlen(type));
1245     char *cyon(pool.strcat("new Type(", str.str().c_str(), ")", NULL));
1246     return CYCastJSValue(context, CYJSString(cyon));
1247 } CYCatch(NULL) }
1248
1249 static JSValueRef Type_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1250     return Type_callAsFunction_toString(context, object, _this, count, arguments, exception);
1251 }
1252
1253 static JSStaticFunction Pointer_staticFunctions[4] = {
1254     {"toCYON", &Pointer_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1255     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1256     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1257     {NULL, NULL, 0}
1258 };
1259
1260 static JSStaticFunction Struct_staticFunctions[2] = {
1261     {"$cya", &Struct_callAsFunction_$cya, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1262     {NULL, NULL, 0}
1263 };
1264
1265 static JSStaticFunction Functor_staticFunctions[4] = {
1266     {"toCYON", &CYValue_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1267     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1268     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1269     {NULL, NULL, 0}
1270 };
1271
1272 namespace cy {
1273     JSStaticFunction const * const Functor::StaticFunctions = Functor_staticFunctions;
1274 }
1275
1276 static JSStaticValue Functor_staticValues[2] = {
1277     {"type", &Functor_getProperty_type, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1278     {NULL, NULL, NULL, 0}
1279 };
1280
1281 static JSStaticValue Type_staticValues[4] = {
1282     {"alignment", &Type_getProperty_alignment, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1283     {"name", &Type_getProperty_name, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1284     {"size", &Type_getProperty_size, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1285     {NULL, NULL, NULL, 0}
1286 };
1287
1288 static JSStaticFunction Type_staticFunctions[8] = {
1289     {"arrayOf", &Type_callAsFunction_arrayOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1290     {"constant", &Type_callAsFunction_constant, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1291     {"pointerTo", &Type_callAsFunction_pointerTo, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1292     {"withName", &Type_callAsFunction_withName, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1293     {"toCYON", &Type_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1294     {"toJSON", &Type_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1295     {"toString", &Type_callAsFunction_toString, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1296     {NULL, NULL, 0}
1297 };
1298
1299 static JSObjectRef (*JSObjectMakeArray$)(JSContextRef, size_t, const JSValueRef[], JSValueRef *);
1300
1301 void CYSetArgs(int argc, const char *argv[]) {
1302     JSContextRef context(CYGetJSContext());
1303     JSValueRef args[argc];
1304     for (int i(0); i != argc; ++i)
1305         args[i] = CYCastJSValue(context, argv[i]);
1306
1307     JSObjectRef array;
1308     if (JSObjectMakeArray$ != NULL) {
1309         JSValueRef exception(NULL);
1310         array = (*JSObjectMakeArray$)(context, argc, args, &exception);
1311         CYThrow(context, exception);
1312     } else {
1313         JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array")));
1314         JSValueRef value(CYCallAsFunction(context, Array, NULL, argc, args));
1315         array = CYCastJSObject(context, value);
1316     }
1317
1318     JSObjectRef System(CYGetCachedObject(context, CYJSString("System")));
1319     CYSetProperty(context, System, CYJSString("args"), array);
1320 }
1321
1322 JSObjectRef CYGetGlobalObject(JSContextRef context) {
1323     return JSContextGetGlobalObject(context);
1324 }
1325
1326 const char *CYExecute(CYPool &pool, CYUTF8String code) {
1327     JSContextRef context(CYGetJSContext());
1328     JSValueRef exception(NULL), result;
1329
1330     void *handle;
1331     if (hooks_ != NULL && hooks_->ExecuteStart != NULL)
1332         handle = (*hooks_->ExecuteStart)(context);
1333     else
1334         handle = NULL;
1335
1336     const char *json;
1337
1338     try {
1339         result = JSEvaluateScript(context, CYJSString(code), NULL, NULL, 0, &exception);
1340     } catch (const char *error) {
1341         return error;
1342     }
1343
1344     if (exception != NULL) error:
1345         return CYPoolCString(pool, context, CYJSString(context, exception));
1346
1347     if (JSValueIsUndefined(context, result))
1348         return NULL;
1349
1350     try {
1351         json = CYPoolCCYON(pool, context, result, &exception);
1352     } catch (const char *error) {
1353         return error;
1354     }
1355
1356     if (exception != NULL)
1357         goto error;
1358
1359     CYSetProperty(context, CYGetGlobalObject(context), Result_, result);
1360
1361     if (hooks_ != NULL && hooks_->ExecuteEnd != NULL)
1362         (*hooks_->ExecuteEnd)(context, handle);
1363     return json;
1364 }
1365
1366 extern "C" void CydgetSetupContext(JSGlobalContextRef context) {
1367     CYSetupContext(context);
1368 }
1369
1370 static bool initialized_ = false;
1371
1372 void CYInitializeDynamic() {
1373     if (!initialized_)
1374         initialized_ = true;
1375     else return;
1376
1377     JSObjectMakeArray$ = reinterpret_cast<JSObjectRef (*)(JSContextRef, size_t, const JSValueRef[], JSValueRef *)>(dlsym(RTLD_DEFAULT, "JSObjectMakeArray"));
1378
1379     JSClassDefinition definition;
1380
1381     definition = kJSClassDefinitionEmpty;
1382     definition.className = "All";
1383     definition.getProperty = &All_getProperty;
1384     definition.getPropertyNames = &All_getPropertyNames;
1385     All_ = JSClassCreate(&definition);
1386
1387     definition = kJSClassDefinitionEmpty;
1388     definition.className = "Context";
1389     definition.finalize = &CYFinalize;
1390     Context_ = JSClassCreate(&definition);
1391
1392     definition = kJSClassDefinitionEmpty;
1393     definition.className = "Functor";
1394     definition.staticFunctions = cy::Functor::StaticFunctions;
1395     definition.staticValues = Functor_staticValues;
1396     definition.callAsFunction = &Functor_callAsFunction;
1397     definition.finalize = &CYFinalize;
1398     Functor_ = JSClassCreate(&definition);
1399
1400     definition = kJSClassDefinitionEmpty;
1401     definition.className = "Pointer";
1402     definition.staticFunctions = Pointer_staticFunctions;
1403     definition.getProperty = &Pointer_getProperty;
1404     definition.setProperty = &Pointer_setProperty;
1405     definition.finalize = &CYFinalize;
1406     Pointer_ = JSClassCreate(&definition);
1407
1408     definition = kJSClassDefinitionEmpty;
1409     definition.className = "Struct";
1410     definition.staticFunctions = Struct_staticFunctions;
1411     definition.getProperty = &Struct_getProperty;
1412     definition.setProperty = &Struct_setProperty;
1413     definition.getPropertyNames = &Struct_getPropertyNames;
1414     definition.finalize = &CYFinalize;
1415     Struct_ = JSClassCreate(&definition);
1416
1417     definition = kJSClassDefinitionEmpty;
1418     definition.className = "Type";
1419     definition.staticValues = Type_staticValues;
1420     definition.staticFunctions = Type_staticFunctions;
1421     definition.callAsFunction = &Type_callAsFunction;
1422     definition.callAsConstructor = &Type_callAsConstructor;
1423     definition.finalize = &CYFinalize;
1424     Type_privateData::Class_ = JSClassCreate(&definition);
1425
1426     definition = kJSClassDefinitionEmpty;
1427     definition.className = "Global";
1428     //definition.getProperty = &Global_getProperty;
1429     Global_ = JSClassCreate(&definition);
1430
1431     Array_s = JSStringCreateWithUTF8CString("Array");
1432     cy_s = JSStringCreateWithUTF8CString("$cy");
1433     length_s = JSStringCreateWithUTF8CString("length");
1434     message_s = JSStringCreateWithUTF8CString("message");
1435     name_s = JSStringCreateWithUTF8CString("name");
1436     pop_s = JSStringCreateWithUTF8CString("pop");
1437     prototype_s = JSStringCreateWithUTF8CString("prototype");
1438     push_s = JSStringCreateWithUTF8CString("push");
1439     splice_s = JSStringCreateWithUTF8CString("splice");
1440     toCYON_s = JSStringCreateWithUTF8CString("toCYON");
1441     toJSON_s = JSStringCreateWithUTF8CString("toJSON");
1442     toPointer_s = JSStringCreateWithUTF8CString("toPointer");
1443     toString_s = JSStringCreateWithUTF8CString("toString");
1444
1445     Result_ = JSStringCreateWithUTF8CString("_");
1446
1447     if (hooks_ != NULL && hooks_->Initialize != NULL)
1448         (*hooks_->Initialize)();
1449 }
1450
1451 void CYThrow(JSContextRef context, JSValueRef value) {
1452     if (value != NULL)
1453         throw CYJSError(context, value);
1454 }
1455
1456 const char *CYJSError::PoolCString(CYPool &pool) const {
1457     // XXX: this used to be CYPoolCString
1458     return CYPoolCCYON(pool, context_, value_);
1459 }
1460
1461 JSValueRef CYJSError::CastJSValue(JSContextRef context) const {
1462     // XXX: what if the context is different?
1463     return value_;
1464 }
1465
1466 JSValueRef CYCastJSError(JSContextRef context, const char *message) {
1467     JSObjectRef Error(CYGetCachedObject(context, CYJSString("Error")));
1468
1469     JSValueRef arguments[1] = {CYCastJSValue(context, message)};
1470
1471     JSValueRef exception(NULL);
1472     JSValueRef value(JSObjectCallAsConstructor(context, Error, 1, arguments, &exception));
1473     CYThrow(context, exception);
1474
1475     return value;
1476 }
1477
1478 JSValueRef CYPoolError::CastJSValue(JSContextRef context) const {
1479     return CYCastJSError(context, message_);
1480 }
1481
1482 CYJSError::CYJSError(JSContextRef context, const char *format, ...) {
1483     _assert(context != NULL);
1484
1485     CYPool pool;
1486
1487     va_list args;
1488     va_start(args, format);
1489     // XXX: there might be a beter way to think about this
1490     const char *message(pool.vsprintf(64, format, args));
1491     va_end(args);
1492
1493     value_ = CYCastJSError(context, message);
1494 }
1495
1496 JSGlobalContextRef CYGetJSContext(JSContextRef context) {
1497     return reinterpret_cast<Context *>(JSObjectGetPrivate(CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s))))->context_;
1498 }
1499
1500 extern "C" void CYSetupContext(JSGlobalContextRef context) {
1501     JSValueRef exception(NULL);
1502
1503     CYInitializeDynamic();
1504
1505     JSObjectRef global(CYGetGlobalObject(context));
1506
1507     JSObjectRef cy(JSObjectMake(context, Context_, new Context(context)));
1508     CYSetProperty(context, global, cy_s, cy, kJSPropertyAttributeDontEnum);
1509
1510 /* Cache Globals {{{ */
1511     JSObjectRef Array(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Array"))));
1512     CYSetProperty(context, cy, CYJSString("Array"), Array);
1513
1514     JSObjectRef Array_prototype(CYCastJSObject(context, CYGetProperty(context, Array, prototype_s)));
1515     CYSetProperty(context, cy, CYJSString("Array_prototype"), Array_prototype);
1516
1517     JSObjectRef Error(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Error"))));
1518     CYSetProperty(context, cy, CYJSString("Error"), Error);
1519
1520     JSObjectRef Function(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Function"))));
1521     CYSetProperty(context, cy, CYJSString("Function"), Function);
1522
1523     JSObjectRef Function_prototype(CYCastJSObject(context, CYGetProperty(context, Function, prototype_s)));
1524     CYSetProperty(context, cy, CYJSString("Function_prototype"), Function_prototype);
1525
1526     JSObjectRef Object(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Object"))));
1527     CYSetProperty(context, cy, CYJSString("Object"), Object);
1528
1529     JSObjectRef Object_prototype(CYCastJSObject(context, CYGetProperty(context, Object, prototype_s)));
1530     CYSetProperty(context, cy, CYJSString("Object_prototype"), Object_prototype);
1531
1532     JSObjectRef String(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("String"))));
1533     CYSetProperty(context, cy, CYJSString("String"), String);
1534
1535     JSObjectRef String_prototype(CYCastJSObject(context, CYGetProperty(context, String, prototype_s)));
1536     CYSetProperty(context, cy, CYJSString("String_prototype"), String_prototype);
1537 /* }}} */
1538
1539     CYSetProperty(context, Array_prototype, toCYON_s, &Array_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1540     CYSetProperty(context, String_prototype, toCYON_s, &String_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1541
1542     JSObjectRef cycript(JSObjectMake(context, NULL, NULL));
1543     CYSetProperty(context, global, CYJSString("Cycript"), cycript);
1544     CYSetProperty(context, cycript, CYJSString("gc"), &Cycript_gc_callAsFunction);
1545
1546     JSObjectRef Functor(JSObjectMakeConstructor(context, Functor_, &Functor_new));
1547     JSObjectSetPrototype(context, CYCastJSObject(context, CYGetProperty(context, Functor, prototype_s)), Function_prototype);
1548     CYSetProperty(context, cycript, CYJSString("Functor"), Functor);
1549
1550     CYSetProperty(context, cycript, CYJSString("Pointer"), JSObjectMakeConstructor(context, Pointer_, &Pointer_new));
1551     CYSetProperty(context, cycript, CYJSString("Type"), JSObjectMakeConstructor(context, Type_privateData::Class_, &Type_new));
1552
1553     JSObjectRef all(JSObjectMake(context, All_, NULL));
1554     CYSetProperty(context, cycript, CYJSString("all"), all);
1555
1556     JSObjectRef alls(JSObjectCallAsConstructor(context, Array, 0, NULL, &exception));
1557     CYThrow(context, exception);
1558     CYSetProperty(context, cycript, CYJSString("alls"), alls);
1559
1560     if (true) {
1561         JSObjectRef last(NULL), curr(global);
1562
1563         goto next; for (JSValueRef next;;) {
1564             if (JSValueIsNull(context, next))
1565                 break;
1566             last = curr;
1567             curr = CYCastJSObject(context, next);
1568           next:
1569             next = JSObjectGetPrototype(context, curr);
1570         }
1571
1572         JSObjectSetPrototype(context, last, all);
1573     }
1574
1575     CYSetProperty(context, global, CYJSString("$cyq"), &$cyq, kJSPropertyAttributeDontEnum);
1576
1577     JSObjectRef System(JSObjectMake(context, NULL, NULL));
1578     CYSetProperty(context, cy, CYJSString("System"), System);
1579
1580     CYSetProperty(context, global, CYJSString("system"), System);
1581     CYSetProperty(context, System, CYJSString("args"), CYJSNull(context));
1582     //CYSetProperty(context, System, CYJSString("global"), global);
1583     CYSetProperty(context, System, CYJSString("print"), &System_print);
1584
1585     if (CYBridgeEntry *entry = CYBridgeHash("1dlerror", 8))
1586         entry->cache_ = new cy::Functor(entry->value_, reinterpret_cast<void (*)()>(&dlerror));
1587
1588     if (hooks_ != NULL && hooks_->SetupContext != NULL)
1589         (*hooks_->SetupContext)(context);
1590
1591     CYArrayPush(context, alls, cycript);
1592 }
1593
1594 JSGlobalContextRef CYGetJSContext() {
1595     CYInitializeDynamic();
1596
1597     static JSGlobalContextRef context_;
1598
1599     if (context_ == NULL) {
1600         context_ = JSGlobalContextCreate(Global_);
1601         CYSetupContext(context_);
1602     }
1603
1604     return context_;
1605 }