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