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