Execute.cpp

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2012  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU Lesser General Public License, Version 3 {{{ */
   6 /*
   7  * Cycript is free software: you can redistribute it and/or modify it under
   8  * the terms of the GNU Lesser General Public License as published by the
   9  * Free Software Foundation, either version 3 of the License, or (at your
  10  * option) any later version.
  11  *
  12  * Cycript is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  15  * License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser 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(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 113     return CYPoolUTF8String(pool, CYCastUTF16String(value));
 114 }
 115
 116 const char *CYPoolCString(apr_pool_t *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(apr_pool_t *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(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 128     return CYGetIndex(CYPoolUTF8String(pool, context, value));
 129 }
 130 /* }}} */
 131
 132 static JSClassRef All_;
 133 static JSClassRef Context_;
 134 static 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     if (--internal->count_ == 0)
 158         delete internal;
 159 }
 160
 161 void Structor_(apr_pool_t *pool, sig::Type *&type) {
 162     if (
 163         type->primitive == sig::pointer_P &&
 164         type->data.data.type != NULL &&
 165         type->data.data.type->primitive == sig::struct_P &&
 166         type->data.data.type->name != NULL &&
 167         strcmp(type->data.data.type->name, "_objc_class") == 0
 168     ) {
 169         type->primitive = sig::typename_P;
 170         type->data.data.type = NULL;
 171         return;
 172     }
 173
 174     if (type->primitive != sig::struct_P || type->name == NULL)
 175         return;
 176
 177     size_t length(strlen(type->name));
 178     char keyed[length + 2];
 179     memcpy(keyed + 1, type->name, length + 1);
 180
 181     static const char *modes = "34";
 182     for (size_t i(0); i != 2; ++i) {
 183         char mode(modes[i]);
 184         keyed[0] = mode;
 185
 186         if (CYBridgeEntry *entry = CYBridgeHash(keyed, length + 1))
 187             switch (mode) {
 188                 case '3':
 189                     sig::Parse(pool, &type->data.signature, entry->value_, &Structor_);
 190                 break;
 191
 192                 case '4': {
 193                     sig::Signature signature;
 194                     sig::Parse(pool, &signature, entry->value_, &Structor_);
 195                     type = signature.elements[0].type;
 196                 } break;
 197             }
 198     }
 199 }
 200
 201 JSClassRef Type_privateData::Class_;
 202
 203 struct Context :
 204     CYData
 205 {
 206     JSGlobalContextRef context_;
 207
 208     Context(JSGlobalContextRef context) :
 209         context_(context)
 210     {
 211     }
 212 };
 213
 214 struct Pointer :
 215     CYOwned
 216 {
 217     Type_privateData *type_;
 218     size_t length_;
 219
 220     Pointer(void *value, JSContextRef context, JSObjectRef owner, size_t length, sig::Type *type) :
 221         CYOwned(value, context, owner),
 222         type_(new(pool_) Type_privateData(type)),
 223         length_(length)
 224     {
 225     }
 226 };
 227
 228 struct Struct_privateData :
 229     CYOwned
 230 {
 231     Type_privateData *type_;
 232
 233     Struct_privateData(JSContextRef context, JSObjectRef owner) :
 234         CYOwned(NULL, context, owner)
 235     {
 236     }
 237 };
 238
 239 typedef std::map<const char *, Type_privateData *, CYCStringLess> TypeMap;
 240 static TypeMap Types_;
 241
 242 JSObjectRef CYMakeStruct(JSContextRef context, void *data, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 243     Struct_privateData *internal(new Struct_privateData(context, owner));
 244     apr_pool_t *pool(internal->pool_);
 245     Type_privateData *typical(new(pool) Type_privateData(type, ffi));
 246     internal->type_ = typical;
 247
 248     if (owner != NULL)
 249         internal->value_ = data;
 250     else {
 251         size_t size(typical->GetFFI()->size);
 252         void *copy(apr_palloc(internal->pool_, size));
 253         memcpy(copy, data, size);
 254         internal->value_ = copy;
 255     }
 256
 257     return JSObjectMake(context, Struct_, internal);
 258 }
 259
 260 JSValueRef CYCastJSValue(JSContextRef context, bool value) {
 261     return JSValueMakeBoolean(context, value);
 262 }
 263
 264 JSValueRef CYCastJSValue(JSContextRef context, double value) {
 265     return JSValueMakeNumber(context, value);
 266 }
 267
 268 #define CYCastJSValue_(Type_) \
 269     JSValueRef CYCastJSValue(JSContextRef context, Type_ value) { \
 270         return JSValueMakeNumber(context, static_cast<double>(value)); \
 271     }
 272
 273 CYCastJSValue_(int)
 274 CYCastJSValue_(unsigned int)
 275 CYCastJSValue_(long int)
 276 CYCastJSValue_(long unsigned int)
 277 CYCastJSValue_(long long int)
 278 CYCastJSValue_(long long unsigned int)
 279
 280 JSValueRef CYJSUndefined(JSContextRef context) {
 281     return JSValueMakeUndefined(context);
 282 }
 283
 284 double CYCastDouble(JSContextRef context, JSValueRef value) {
 285     JSValueRef exception(NULL);
 286     double number(JSValueToNumber(context, value, &exception));
 287     CYThrow(context, exception);
 288     return number;
 289 }
 290
 291 bool CYCastBool(JSContextRef context, JSValueRef value) {
 292     return JSValueToBoolean(context, value);
 293 }
 294
 295 JSValueRef CYJSNull(JSContextRef context) {
 296     return JSValueMakeNull(context);
 297 }
 298
 299 JSValueRef CYCastJSValue(JSContextRef context, JSStringRef value) {
 300     return value == NULL ? CYJSNull(context) : JSValueMakeString(context, value);
 301 }
 302
 303 JSValueRef CYCastJSValue(JSContextRef context, const char *value) {
 304     return CYCastJSValue(context, CYJSString(value));
 305 }
 306
 307 JSObjectRef CYCastJSObject(JSContextRef context, JSValueRef value) {
 308     JSValueRef exception(NULL);
 309     JSObjectRef object(JSValueToObject(context, value, &exception));
 310     CYThrow(context, exception);
 311     return object;
 312 }
 313
 314 JSValueRef CYCallAsFunction(JSContextRef context, JSObjectRef function, JSObjectRef _this, size_t count, const JSValueRef arguments[]) {
 315     JSValueRef exception(NULL);
 316     JSValueRef value(JSObjectCallAsFunction(context, function, _this, count, arguments, &exception));
 317     CYThrow(context, exception);
 318     return value;
 319 }
 320
 321 bool CYIsCallable(JSContextRef context, JSValueRef value) {
 322     return value != NULL && JSValueIsObject(context, value) && JSObjectIsFunction(context, (JSObjectRef) value);
 323 }
 324
 325 static JSValueRef System_print(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 326     if (count == 0)
 327         printf("\n");
 328     else {
 329         CYPool pool;
 330         printf("%s\n", CYPoolCString(pool, context, arguments[0]));
 331     }
 332
 333     return CYJSUndefined(context);
 334 } CYCatch }
 335
 336 static size_t Nonce_(0);
 337
 338 static JSValueRef $cyq(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 339     CYPool pool;
 340     const char *name(apr_psprintf(pool, "%s%"APR_SIZE_T_FMT"", CYPoolCString(pool, context, arguments[0]), Nonce_++));
 341     return CYCastJSValue(context, name);
 342 }
 343
 344 static JSValueRef Cycript_gc_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 345     JSGarbageCollect(context);
 346     return CYJSUndefined(context);
 347 }
 348
 349 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSValueRef value, JSValueRef *exception) { CYTry {
 350     switch (JSType type = JSValueGetType(context, value)) {
 351         case kJSTypeUndefined:
 352             return "undefined";
 353         case kJSTypeNull:
 354             return "null";
 355         case kJSTypeBoolean:
 356             return CYCastBool(context, value) ? "true" : "false";
 357
 358         case kJSTypeNumber: {
 359             std::ostringstream str;
 360             CYNumerify(str, CYCastDouble(context, value));
 361             std::string value(str.str());
 362             return apr_pstrmemdup(pool, value.c_str(), value.size());
 363         } break;
 364
 365         case kJSTypeString: {
 366             std::ostringstream str;
 367             CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, value)));
 368             CYStringify(str, string.data, string.size);
 369             std::string value(str.str());
 370             return apr_pstrmemdup(pool, value.c_str(), value.size());
 371         } break;
 372
 373         case kJSTypeObject:
 374             return CYPoolCCYON(pool, context, (JSObjectRef) value);
 375         default:
 376             throw CYJSError(context, "JSValueGetType() == 0x%x", type);
 377     }
 378 } CYCatch }
 379
 380 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSValueRef value) {
 381     JSValueRef exception(NULL);
 382     const char *cyon(CYPoolCCYON(pool, context, value, &exception));
 383     CYThrow(context, exception);
 384     return cyon;
 385 }
 386
 387 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSObjectRef object) {
 388     JSValueRef toCYON(CYGetProperty(context, object, toCYON_s));
 389     if (CYIsCallable(context, toCYON)) {
 390         JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toCYON, object, 0, NULL));
 391         _assert(value != NULL);
 392         return CYPoolCString(pool, context, value);
 393     }
 394
 395     JSValueRef toJSON(CYGetProperty(context, object, toJSON_s));
 396     if (CYIsCallable(context, toJSON)) {
 397         JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 398         JSValueRef exception(NULL);
 399         const char *cyon(CYPoolCCYON(pool, context, CYCallAsFunction(context, (JSObjectRef) toJSON, object, 1, arguments), &exception));
 400         CYThrow(context, exception);
 401         return cyon;
 402     }
 403
 404     if (JSObjectIsFunction(context, object)) {
 405         JSValueRef toString(CYGetProperty(context, object, toString_s));
 406         if (CYIsCallable(context, toString)) {
 407             JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 408             JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toString, object, 1, arguments));
 409             _assert(value != NULL);
 410             return CYPoolCString(pool, context, value);
 411         }
 412     }
 413
 414     std::ostringstream str;
 415
 416     str << '{';
 417
 418     // XXX: this is, sadly, going to leak
 419     JSPropertyNameArrayRef names(JSObjectCopyPropertyNames(context, object));
 420
 421     bool comma(false);
 422
 423     for (size_t index(0), count(JSPropertyNameArrayGetCount(names)); index != count; ++index) {
 424         JSStringRef name(JSPropertyNameArrayGetNameAtIndex(names, index));
 425         JSValueRef value(CYGetProperty(context, object, name));
 426
 427         if (comma)
 428             str << ',';
 429         else
 430             comma = true;
 431
 432         CYUTF8String string(CYPoolUTF8String(pool, context, name));
 433         if (CYIsKey(string))
 434             str << string.data;
 435         else
 436             CYStringify(str, string.data, string.size);
 437
 438         str << ':' << CYPoolCCYON(pool, context, value);
 439     }
 440
 441     str << '}';
 442
 443     JSPropertyNameArrayRelease(names);
 444
 445     std::string string(str.str());
 446     return apr_pstrmemdup(pool, string.c_str(), string.size());
 447 }
 448
 449 static JSValueRef Array_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 450     CYPool pool;
 451     std::ostringstream str;
 452
 453     str << '[';
 454
 455     JSValueRef length(CYGetProperty(context, _this, length_s));
 456     bool comma(false);
 457
 458     for (size_t index(0), count(CYCastDouble(context, length)); index != count; ++index) {
 459         JSValueRef value(CYGetProperty(context, _this, index));
 460
 461         if (comma)
 462             str << ',';
 463         else
 464             comma = true;
 465
 466         if (!JSValueIsUndefined(context, value))
 467             str << CYPoolCCYON(pool, context, value);
 468         else {
 469             str << ',';
 470             comma = false;
 471         }
 472     }
 473
 474     str << ']';
 475
 476     std::string value(str.str());
 477     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 478 } CYCatch }
 479
 480 static JSValueRef String_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 481     CYPool pool;
 482     std::ostringstream str;
 483
 484     CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, _this)));
 485     CYStringify(str, string.data, string.size);
 486
 487     std::string value(str.str());
 488     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 489 } CYCatch }
 490
 491 JSObjectRef CYMakePointer(JSContextRef context, void *pointer, size_t length, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 492     Pointer *internal(new Pointer(pointer, context, owner, length, type));
 493     return JSObjectMake(context, Pointer_, internal);
 494 }
 495
 496 static JSObjectRef CYMakeFunctor(JSContextRef context, void (*function)(), const char *type, void **cache = NULL) {
 497     cy::Functor *internal;
 498
 499     if (cache != NULL && *cache != NULL) {
 500         internal = reinterpret_cast<cy::Functor *>(*cache);
 501         ++internal->count_;
 502     } else {
 503         internal = new cy::Functor(type, function);
 504
 505         if (cache != NULL) {
 506             *cache = internal;
 507             ++internal->count_;
 508         }
 509     }
 510
 511     return JSObjectMake(context, Functor_, internal);
 512 }
 513
 514 static bool CYGetOffset(apr_pool_t *pool, JSContextRef context, JSStringRef value, ssize_t &index) {
 515     return CYGetOffset(CYPoolCString(pool, context, value), index);
 516 }
 517
 518 void *CYCastPointer_(JSContextRef context, JSValueRef value) {
 519     switch (JSValueGetType(context, value)) {
 520         case kJSTypeNull:
 521             return NULL;
 522         case kJSTypeObject: {
 523             JSObjectRef object((JSObjectRef) value);
 524             if (JSValueIsObjectOfClass(context, value, Pointer_)) {
 525                 Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 526                 return internal->value_;
 527             }
 528             JSValueRef toPointer(CYGetProperty(context, object, toPointer_s));
 529             if (CYIsCallable(context, toPointer)) {
 530                 JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toPointer, object, 0, NULL));
 531                 _assert(value != NULL);
 532                 return CYCastPointer_(context, value);
 533             }
 534         } default:
 535             double number(CYCastDouble(context, value));
 536             if (std::isnan(number))
 537                 throw CYJSError(context, "cannot convert value to pointer");
 538             return reinterpret_cast<void *>(static_cast<uintptr_t>(static_cast<long long>(number)));
 539     }
 540 }
 541
 542 void CYPoolFFI(apr_pool_t *pool, JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, JSValueRef value) {
 543     switch (type->primitive) {
 544         case sig::boolean_P:
 545             *reinterpret_cast<bool *>(data) = JSValueToBoolean(context, value);
 546         break;
 547
 548 #define CYPoolFFI_(primitive, native) \
 549         case sig::primitive ## _P: \
 550             *reinterpret_cast<native *>(data) = CYCastDouble(context, value); \
 551         break;
 552
 553         CYPoolFFI_(uchar, unsigned char)
 554         CYPoolFFI_(char, char)
 555         CYPoolFFI_(ushort, unsigned short)
 556         CYPoolFFI_(short, short)
 557         CYPoolFFI_(ulong, unsigned long)
 558         CYPoolFFI_(long, long)
 559         CYPoolFFI_(uint, unsigned int)
 560         CYPoolFFI_(int, int)
 561         CYPoolFFI_(ulonglong, unsigned long long)
 562         CYPoolFFI_(longlong, long long)
 563         CYPoolFFI_(float, float)
 564         CYPoolFFI_(double, double)
 565
 566         case sig::array_P: {
 567             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 568             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 569             for (size_t index(0); index != type->data.data.size; ++index) {
 570                 ffi_type *field(ffi->elements[index]);
 571
 572                 JSValueRef rhs;
 573                 if (aggregate == NULL)
 574                     rhs = value;
 575                 else {
 576                     rhs = CYGetProperty(context, aggregate, index);
 577                     if (JSValueIsUndefined(context, rhs))
 578                         throw CYJSError(context, "unable to extract array value");
 579                 }
 580
 581                 CYPoolFFI(pool, context, type->data.data.type, field, base, rhs);
 582                 // XXX: alignment?
 583                 base += field->size;
 584             }
 585         } break;
 586
 587         case sig::pointer_P:
 588             *reinterpret_cast<void **>(data) = CYCastPointer<void *>(context, value);
 589         break;
 590
 591         case sig::string_P:
 592             *reinterpret_cast<const char **>(data) = CYPoolCString(pool, context, value);
 593         break;
 594
 595         case sig::struct_P: {
 596             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 597             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 598             for (size_t index(0); index != type->data.signature.count; ++index) {
 599                 sig::Element *element(&type->data.signature.elements[index]);
 600                 ffi_type *field(ffi->elements[index]);
 601
 602                 JSValueRef rhs;
 603                 if (aggregate == NULL)
 604                     rhs = value;
 605                 else {
 606                     rhs = CYGetProperty(context, aggregate, index);
 607                     if (JSValueIsUndefined(context, rhs)) {
 608                         if (element->name != NULL)
 609                             rhs = CYGetProperty(context, aggregate, CYJSString(element->name));
 610                         else
 611                             goto undefined;
 612                         if (JSValueIsUndefined(context, rhs)) undefined:
 613                             throw CYJSError(context, "unable to extract structure value");
 614                     }
 615                 }
 616
 617                 CYPoolFFI(pool, context, element->type, field, base, rhs);
 618                 // XXX: alignment?
 619                 base += field->size;
 620             }
 621         } break;
 622
 623         case sig::void_P:
 624         break;
 625
 626         default:
 627             if (hooks_ != NULL && hooks_->PoolFFI != NULL)
 628                 if ((*hooks_->PoolFFI)(pool, context, type, ffi, data, value))
 629                     return;
 630
 631             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 632     }
 633 }
 634
 635 JSValueRef CYFromFFI(JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, bool initialize, JSObjectRef owner) {
 636     switch (type->primitive) {
 637         case sig::boolean_P:
 638             return CYCastJSValue(context, *reinterpret_cast<bool *>(data));
 639
 640 #define CYFromFFI_(primitive, native) \
 641         case sig::primitive ## _P: \
 642             return CYCastJSValue(context, *reinterpret_cast<native *>(data)); \
 643
 644         CYFromFFI_(uchar, unsigned char)
 645         CYFromFFI_(char, char)
 646         CYFromFFI_(ushort, unsigned short)
 647         CYFromFFI_(short, short)
 648         CYFromFFI_(ulong, unsigned long)
 649         CYFromFFI_(long, long)
 650         CYFromFFI_(uint, unsigned int)
 651         CYFromFFI_(int, int)
 652         CYFromFFI_(ulonglong, unsigned long long)
 653         CYFromFFI_(longlong, long long)
 654         CYFromFFI_(float, float)
 655         CYFromFFI_(double, double)
 656
 657         case sig::array_P:
 658             if (void *pointer = data)
 659                 return CYMakePointer(context, pointer, type->data.data.size, type->data.data.type, NULL, owner);
 660             else goto null;
 661
 662         case sig::pointer_P:
 663             if (void *pointer = *reinterpret_cast<void **>(data))
 664                 return CYMakePointer(context, pointer, _not(size_t), type->data.data.type, NULL, owner);
 665             else goto null;
 666
 667         case sig::string_P:
 668             if (char *utf8 = *reinterpret_cast<char **>(data))
 669                 return CYCastJSValue(context, utf8);
 670             else goto null;
 671
 672         case sig::struct_P:
 673             return CYMakeStruct(context, data, type, ffi, owner);
 674         case sig::void_P:
 675             return CYJSUndefined(context);
 676
 677         null:
 678             return CYJSNull(context);
 679         default:
 680             if (hooks_ != NULL && hooks_->FromFFI != NULL)
 681                 if (JSValueRef value = (*hooks_->FromFFI)(context, type, ffi, data, initialize, owner))
 682                     return value;
 683
 684             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 685     }
 686 }
 687
 688 static void FunctionClosure_(ffi_cif *cif, void *result, void **arguments, void *arg) {
 689     Closure_privateData *internal(reinterpret_cast<Closure_privateData *>(arg));
 690
 691     JSContextRef context(internal->context_);
 692
 693     size_t count(internal->cif_.nargs);
 694     JSValueRef values[count];
 695
 696     for (size_t index(0); index != count; ++index)
 697         values[index] = CYFromFFI(context, internal->signature_.elements[1 + index].type, internal->cif_.arg_types[index], arguments[index]);
 698
 699     JSValueRef value(CYCallAsFunction(context, internal->function_, NULL, count, values));
 700     CYPoolFFI(NULL, context, internal->signature_.elements[0].type, internal->cif_.rtype, result, value);
 701 }
 702
 703 Closure_privateData *CYMakeFunctor_(JSContextRef context, JSObjectRef function, const char *type, void (*callback)(ffi_cif *, void *, void **, void *)) {
 704     // XXX: in case of exceptions this will leak
 705     // XXX: in point of fact, this may /need/ to leak :(
 706     Closure_privateData *internal(new Closure_privateData(context, function, type));
 707
 708 #if defined(__APPLE__) && defined(__arm__)
 709     void *executable;
 710     ffi_closure *writable(reinterpret_cast<ffi_closure *>(ffi_closure_alloc(sizeof(ffi_closure), &executable)));
 711
 712     ffi_status status(ffi_prep_closure_loc(writable, &internal->cif_, callback, internal, executable));
 713     _assert(status == FFI_OK);
 714
 715     internal->value_ = executable;
 716 #else
 717     ffi_closure *closure((ffi_closure *) _syscall(mmap(
 718         NULL, sizeof(ffi_closure),
 719         PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE,
 720         -1, 0
 721     )));
 722
 723     ffi_status status(ffi_prep_closure(closure, &internal->cif_, callback, internal));
 724     _assert(status == FFI_OK);
 725
 726     _syscall(mprotect(closure, sizeof(*closure), PROT_READ | PROT_EXEC));
 727
 728     internal->value_ = closure;
 729 #endif
 730
 731     return internal;
 732 }
 733
 734 static JSObjectRef CYMakeFunctor(JSContextRef context, JSObjectRef function, const char *type) {
 735     Closure_privateData *internal(CYMakeFunctor_(context, function, type, &FunctionClosure_));
 736     JSObjectRef object(JSObjectMake(context, Functor_, internal));
 737     // XXX: see above notes about needing to leak
 738     JSValueProtect(CYGetJSContext(context), object);
 739     return object;
 740 }
 741
 742 JSObjectRef CYGetCachedObject(JSContextRef context, JSStringRef name) {
 743     return CYCastJSObject(context, CYGetProperty(context, CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s)), name));
 744 }
 745
 746 static JSObjectRef CYMakeFunctor(JSContextRef context, JSValueRef value, const char *type) {
 747     JSObjectRef Function(CYGetCachedObject(context, CYJSString("Function")));
 748
 749     JSValueRef exception(NULL);
 750     bool function(JSValueIsInstanceOfConstructor(context, value, Function, &exception));
 751     CYThrow(context, exception);
 752
 753     if (function) {
 754         JSObjectRef function(CYCastJSObject(context, value));
 755         return CYMakeFunctor(context, function, type);
 756     } else {
 757         void (*function)()(CYCastPointer<void (*)()>(context, value));
 758         return CYMakeFunctor(context, function, type);
 759     }
 760 }
 761
 762 static bool Index_(apr_pool_t *pool, JSContextRef context, Struct_privateData *internal, JSStringRef property, ssize_t &index, uint8_t *&base) {
 763     Type_privateData *typical(internal->type_);
 764     sig::Type *type(typical->type_);
 765     if (type == NULL)
 766         return false;
 767
 768     const char *name(CYPoolCString(pool, context, property));
 769     size_t length(strlen(name));
 770     double number(CYCastDouble(name, length));
 771
 772     size_t count(type->data.signature.count);
 773
 774     if (std::isnan(number)) {
 775         if (property == NULL)
 776             return false;
 777
 778         sig::Element *elements(type->data.signature.elements);
 779
 780         for (size_t local(0); local != count; ++local) {
 781             sig::Element *element(&elements[local]);
 782             if (element->name != NULL && strcmp(name, element->name) == 0) {
 783                 index = local;
 784                 goto base;
 785             }
 786         }
 787
 788         return false;
 789     } else {
 790         index = static_cast<ssize_t>(number);
 791         if (index != number || index < 0 || static_cast<size_t>(index) >= count)
 792             return false;
 793     }
 794
 795   base:
 796     ffi_type **elements(typical->GetFFI()->elements);
 797
 798     base = reinterpret_cast<uint8_t *>(internal->value_);
 799     for (ssize_t local(0); local != index; ++local)
 800         base += elements[local]->size;
 801
 802     return true;
 803 }
 804
 805 static JSValueRef Pointer_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 806     CYPool pool;
 807     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 808
 809     if (JSStringIsEqual(property, length_s))
 810         return internal->length_ == _not(size_t) ? CYJSUndefined(context) : CYCastJSValue(context, internal->length_);
 811
 812     Type_privateData *typical(internal->type_);
 813
 814     if (typical->type_ == NULL)
 815         return NULL;
 816
 817     ssize_t offset;
 818     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 819         offset = 0;
 820     else if (!CYGetOffset(pool, context, property, offset))
 821         return NULL;
 822
 823     ffi_type *ffi(typical->GetFFI());
 824
 825     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 826     base += ffi->size * offset;
 827
 828     JSObjectRef owner(internal->GetOwner() ?: object);
 829     return CYFromFFI(context, typical->type_, ffi, base, false, owner);
 830 } CYCatch }
 831
 832 static bool Pointer_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 833     CYPool pool;
 834     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 835     Type_privateData *typical(internal->type_);
 836
 837     if (typical->type_ == NULL)
 838         return NULL;
 839
 840     ssize_t offset;
 841     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 842         offset = 0;
 843     else if (!CYGetOffset(pool, context, property, offset))
 844         return NULL;
 845
 846     ffi_type *ffi(typical->GetFFI());
 847
 848     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 849     base += ffi->size * offset;
 850
 851     CYPoolFFI(NULL, context, typical->type_, ffi, base, value);
 852     return true;
 853 } CYCatch }
 854
 855 static JSValueRef Struct_callAsFunction_$cya(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 856     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(_this)));
 857     Type_privateData *typical(internal->type_);
 858     return CYMakePointer(context, internal->value_, _not(size_t), typical->type_, typical->ffi_, _this);
 859 }
 860
 861 static JSValueRef Struct_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 862     CYPool pool;
 863     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 864     Type_privateData *typical(internal->type_);
 865
 866     ssize_t index;
 867     uint8_t *base;
 868
 869     if (!Index_(pool, context, internal, property, index, base))
 870         return NULL;
 871
 872     JSObjectRef owner(internal->GetOwner() ?: object);
 873
 874     return CYFromFFI(context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, false, owner);
 875 } CYCatch }
 876
 877 static bool Struct_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 878     CYPool pool;
 879     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 880     Type_privateData *typical(internal->type_);
 881
 882     ssize_t index;
 883     uint8_t *base;
 884
 885     if (!Index_(pool, context, internal, property, index, base))
 886         return false;
 887
 888     CYPoolFFI(NULL, context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, value);
 889     return true;
 890 } CYCatch }
 891
 892 static void Struct_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
 893     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 894     Type_privateData *typical(internal->type_);
 895     sig::Type *type(typical->type_);
 896
 897     if (type == NULL)
 898         return;
 899
 900     size_t count(type->data.signature.count);
 901     sig::Element *elements(type->data.signature.elements);
 902
 903     char number[32];
 904
 905     for (size_t index(0); index != count; ++index) {
 906         const char *name;
 907         name = elements[index].name;
 908
 909         if (name == NULL) {
 910             sprintf(number, "%zu", index);
 911             name = number;
 912         }
 913
 914         JSPropertyNameAccumulatorAddName(names, CYJSString(name));
 915     }
 916 }
 917
 918 JSValueRef CYCallFunction(apr_pool_t *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 {
 919     if (setups + count != signature->count - 1)
 920         throw CYJSError(context, "incorrect number of arguments to ffi function");
 921
 922     size_t size(setups + count);
 923     void *values[size];
 924     memcpy(values, setup, sizeof(void *) * setups);
 925
 926     for (size_t index(setups); index != size; ++index) {
 927         sig::Element *element(&signature->elements[index + 1]);
 928         ffi_type *ffi(cif->arg_types[index]);
 929         // XXX: alignment?
 930         values[index] = new(pool) uint8_t[ffi->size];
 931         CYPoolFFI(pool, context, element->type, ffi, values[index], arguments[index - setups]);
 932     }
 933
 934     uint8_t value[cif->rtype->size];
 935
 936     if (hooks_ != NULL && hooks_->CallFunction != NULL)
 937         (*hooks_->CallFunction)(context, cif, function, value, values);
 938     else
 939         ffi_call(cif, function, value, values);
 940
 941     return CYFromFFI(context, signature->elements[0].type, cif->rtype, value, initialize);
 942 } CYCatch }
 943
 944 static JSValueRef Functor_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 945     CYPool pool;
 946     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
 947     return CYCallFunction(pool, context, 0, NULL, count, arguments, false, exception, &internal->signature_, &internal->cif_, internal->GetValue());
 948 }
 949
 950 static JSObjectRef CYMakeType(JSContextRef context, const char *type) {
 951     Type_privateData *internal(new Type_privateData(type));
 952     return JSObjectMake(context, Type_privateData::Class_, internal);
 953 }
 954
 955 static JSObjectRef CYMakeType(JSContextRef context, sig::Type *type) {
 956     Type_privateData *internal(new Type_privateData(type));
 957     return JSObjectMake(context, Type_privateData::Class_, internal);
 958 }
 959
 960 static void *CYCastSymbol(const char *name) {
 961     return dlsym(RTLD_DEFAULT, name);
 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                     if (void (*symbol)() = reinterpret_cast<void (*)()>(CYCastSymbol(name.data)))
 994                         return CYMakeFunctor(context, symbol, entry->value_, &entry->cache_);
 995                     else return NULL;
 996
 997                 case '2':
 998                     if (void *symbol = CYCastSymbol(name.data)) {
 999                         // XXX: this is horrendously inefficient
1000                         sig::Signature signature;
1001                         sig::Parse(pool, &signature, entry->value_, &Structor_);
1002                         ffi_cif cif;
1003                         sig::sig_ffi_cif(pool, &sig::ObjectiveC, &signature, &cif);
1004                         return CYFromFFI(context, signature.elements[0].type, cif.rtype, symbol);
1005                     } else return NULL;
1006
1007                 // XXX: implement case 3
1008                 case '4':
1009                     return CYMakeType(context, entry->value_);
1010             }
1011     }
1012
1013     return NULL;
1014 } CYCatch }
1015
1016 static void All_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
1017     JSObjectRef global(CYGetGlobalObject(context));
1018     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
1019     JSObjectRef alls(CYCastJSObject(context, CYGetProperty(context, cycript, CYJSString("alls"))));
1020
1021     for (size_t i(0), count(CYArrayLength(context, alls)); i != count; ++i)
1022         if (JSObjectRef space = CYCastJSObject(context, CYArrayGet(context, alls, count - i - 1))) {
1023             JSPropertyNameArrayRef subset(JSObjectCopyPropertyNames(context, space));
1024             for (size_t index(0), count(JSPropertyNameArrayGetCount(subset)); index != count; ++index)
1025                 JSPropertyNameAccumulatorAddName(names, JSPropertyNameArrayGetNameAtIndex(subset, index));
1026             JSPropertyNameArrayRelease(subset);
1027         }
1028 }
1029
1030 static JSObjectRef Pointer_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1031     if (count != 2)
1032         throw CYJSError(context, "incorrect number of arguments to Pointer constructor");
1033
1034     CYPool pool;
1035
1036     void *value(CYCastPointer<void *>(context, arguments[0]));
1037     const char *type(CYPoolCString(pool, context, arguments[1]));
1038
1039     sig::Signature signature;
1040     sig::Parse(pool, &signature, type, &Structor_);
1041
1042     return CYMakePointer(context, value, _not(size_t), signature.elements[0].type, NULL, NULL);
1043 } CYCatch }
1044
1045 static JSObjectRef Type_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1046     if (count != 1)
1047         throw CYJSError(context, "incorrect number of arguments to Type constructor");
1048     CYPool pool;
1049     const char *type(CYPoolCString(pool, context, arguments[0]));
1050     return CYMakeType(context, type);
1051 } CYCatch }
1052
1053 static JSValueRef Type_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1054     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1055
1056     sig::Type type;
1057
1058     if (JSStringIsEqualToUTF8CString(property, "$cyi")) {
1059         type.primitive = sig::pointer_P;
1060         type.data.data.size = 0;
1061     } else {
1062         CYPool pool;
1063         size_t index(CYGetIndex(pool, context, property));
1064         if (index == _not(size_t))
1065             return NULL;
1066         type.primitive = sig::array_P;
1067         type.data.data.size = index;
1068     }
1069
1070     type.name = NULL;
1071     type.flags = 0;
1072
1073     type.data.data.type = internal->type_;
1074
1075     return CYMakeType(context, &type);
1076 } CYCatch }
1077
1078 static JSValueRef Type_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1079     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1080
1081     if (count != 1)
1082         throw CYJSError(context, "incorrect number of arguments to type cast function");
1083     sig::Type *type(internal->type_);
1084     ffi_type *ffi(internal->GetFFI());
1085     // XXX: alignment?
1086     uint8_t value[ffi->size];
1087     CYPool pool;
1088     CYPoolFFI(pool, context, type, ffi, value, arguments[0]);
1089     return CYFromFFI(context, type, ffi, value);
1090 } CYCatch }
1091
1092 static JSObjectRef Type_callAsConstructor(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1093     if (count != 0)
1094         throw CYJSError(context, "incorrect number of arguments to type cast function");
1095     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1096
1097     sig::Type *type(internal->type_);
1098     size_t length;
1099
1100     if (type->primitive != sig::array_P)
1101         length = _not(size_t);
1102     else {
1103         length = type->data.data.size;
1104         type = type->data.data.type;
1105     }
1106
1107     void *value(malloc(internal->GetFFI()->size));
1108     return CYMakePointer(context, value, length, type, NULL, NULL);
1109 } CYCatch }
1110
1111 static JSObjectRef Functor_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1112     if (count != 2)
1113         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1114     CYPool pool;
1115     const char *type(CYPoolCString(pool, context, arguments[1]));
1116     return CYMakeFunctor(context, arguments[0], type);
1117 } CYCatch }
1118
1119 static JSValueRef CYValue_callAsFunction_valueOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1120     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1121     return CYCastJSValue(context, reinterpret_cast<uintptr_t>(internal->value_));
1122 } CYCatch }
1123
1124 static JSValueRef CYValue_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1125     return CYValue_callAsFunction_valueOf(context, object, _this, count, arguments, exception);
1126 }
1127
1128 static JSValueRef CYValue_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1129     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1130     char string[32];
1131     sprintf(string, "%p", internal->value_);
1132     return CYCastJSValue(context, string);
1133 } CYCatch }
1134
1135 static JSValueRef Pointer_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1136     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(_this)));
1137     if (internal->length_ != _not(size_t)) {
1138         JSObjectRef Array(CYGetCachedObject(context, Array_s));
1139         JSObjectRef toCYON(CYCastJSObject(context, CYGetProperty(context, Array, toCYON_s)));
1140         return CYCallAsFunction(context, toCYON, _this, count, arguments);
1141     } else {
1142         char string[32];
1143         sprintf(string, "%p", internal->value_);
1144         return CYCastJSValue(context, string);
1145     }
1146 } CYCatch }
1147
1148 static JSValueRef Type_getProperty_alignment(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) {
1149     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1150     return CYCastJSValue(context, internal->GetFFI()->alignment);
1151 }
1152
1153 static JSValueRef Type_getProperty_size(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) {
1154     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1155     return CYCastJSValue(context, internal->GetFFI()->size);
1156 }
1157
1158 static JSValueRef Type_callAsFunction_toString(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1159     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1160     CYPool pool;
1161     const char *type(sig::Unparse(pool, internal->type_));
1162     return CYCastJSValue(context, CYJSString(type));
1163 } CYCatch }
1164
1165 static JSValueRef Type_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1166     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1167     CYPool pool;
1168     const char *type(sig::Unparse(pool, internal->type_));
1169     size_t size(strlen(type));
1170     char *cyon(new(pool) char[12 + size + 1]);
1171     memcpy(cyon, "new Type(\"", 10);
1172     cyon[12 + size] = '\0';
1173     cyon[12 + size - 2] = '"';
1174     cyon[12 + size - 1] = ')';
1175     memcpy(cyon + 10, type, size);
1176     return CYCastJSValue(context, CYJSString(cyon));
1177 } CYCatch }
1178
1179 static JSValueRef Type_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1180     return Type_callAsFunction_toString(context, object, _this, count, arguments, exception);
1181 }
1182
1183 static JSStaticFunction Pointer_staticFunctions[4] = {
1184     {"toCYON", &Pointer_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1185     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1186     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1187     {NULL, NULL, 0}
1188 };
1189
1190 static JSStaticFunction Struct_staticFunctions[2] = {
1191     {"$cya", &Struct_callAsFunction_$cya, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1192     {NULL, NULL, 0}
1193 };
1194
1195 static JSStaticFunction Functor_staticFunctions[4] = {
1196     {"toCYON", &CYValue_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1197     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1198     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1199     {NULL, NULL, 0}
1200 };
1201
1202 namespace cy {
1203     JSStaticFunction const * const Functor::StaticFunctions = Functor_staticFunctions;
1204 }
1205
1206 static JSStaticValue Type_staticValues[3] = {
1207     {"alignment", &Type_getProperty_alignment, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1208     {"size", &Type_getProperty_size, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1209     {NULL, NULL, NULL, 0}
1210 };
1211
1212 static JSStaticFunction Type_staticFunctions[4] = {
1213     {"toCYON", &Type_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1214     {"toJSON", &Type_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1215     {"toString", &Type_callAsFunction_toString, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1216     {NULL, NULL, 0}
1217 };
1218
1219 static JSObjectRef (*JSObjectMakeArray$)(JSContextRef, size_t, const JSValueRef[], JSValueRef *);
1220
1221 void CYSetArgs(int argc, const char *argv[]) {
1222     JSContextRef context(CYGetJSContext());
1223     JSValueRef args[argc];
1224     for (int i(0); i != argc; ++i)
1225         args[i] = CYCastJSValue(context, argv[i]);
1226
1227     JSObjectRef array;
1228     if (JSObjectMakeArray$ != NULL) {
1229         JSValueRef exception(NULL);
1230         array = (*JSObjectMakeArray$)(context, argc, args, &exception);
1231         CYThrow(context, exception);
1232     } else {
1233         JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array")));
1234         JSValueRef value(CYCallAsFunction(context, Array, NULL, argc, args));
1235         array = CYCastJSObject(context, value);
1236     }
1237
1238     JSObjectRef System(CYGetCachedObject(context, CYJSString("System")));
1239     CYSetProperty(context, System, CYJSString("args"), array);
1240 }
1241
1242 JSObjectRef CYGetGlobalObject(JSContextRef context) {
1243     return JSContextGetGlobalObject(context);
1244 }
1245
1246 const char *CYExecute(apr_pool_t *pool, CYUTF8String code) {
1247     JSContextRef context(CYGetJSContext());
1248     JSValueRef exception(NULL), result;
1249
1250     void *handle;
1251     if (hooks_ != NULL && hooks_->ExecuteStart != NULL)
1252         handle = (*hooks_->ExecuteStart)(context);
1253     else
1254         handle = NULL;
1255
1256     const char *json;
1257
1258     try {
1259         result = JSEvaluateScript(context, CYJSString(code), NULL, NULL, 0, &exception);
1260     } catch (const char *error) {
1261         return error;
1262     }
1263
1264     if (exception != NULL) error:
1265         return CYPoolCString(pool, context, CYJSString(context, exception));
1266
1267     if (JSValueIsUndefined(context, result))
1268         return NULL;
1269
1270     try {
1271         json = CYPoolCCYON(pool, context, result, &exception);
1272     } catch (const char *error) {
1273         return error;
1274     }
1275
1276     if (exception != NULL)
1277         goto error;
1278
1279     CYSetProperty(context, CYGetGlobalObject(context), Result_, result);
1280
1281     if (hooks_ != NULL && hooks_->ExecuteEnd != NULL)
1282         (*hooks_->ExecuteEnd)(context, handle);
1283     return json;
1284 }
1285
1286 extern "C" void CydgetSetupContext(JSGlobalContextRef context) {
1287     CYSetupContext(context);
1288 }
1289
1290 static bool initialized_ = false;
1291
1292 void CYInitializeDynamic() {
1293     if (!initialized_)
1294         initialized_ = true;
1295     else return;
1296
1297     CYInitializeStatic();
1298
1299     JSObjectMakeArray$ = reinterpret_cast<JSObjectRef (*)(JSContextRef, size_t, const JSValueRef[], JSValueRef *)>(dlsym(RTLD_DEFAULT, "JSObjectMakeArray"));
1300
1301     JSClassDefinition definition;
1302
1303     definition = kJSClassDefinitionEmpty;
1304     definition.className = "All";
1305     definition.getProperty = &All_getProperty;
1306     definition.getPropertyNames = &All_getPropertyNames;
1307     All_ = JSClassCreate(&definition);
1308
1309     definition = kJSClassDefinitionEmpty;
1310     definition.className = "Context";
1311     definition.finalize = &CYFinalize;
1312     Context_ = JSClassCreate(&definition);
1313
1314     definition = kJSClassDefinitionEmpty;
1315     definition.className = "Functor";
1316     definition.staticFunctions = cy::Functor::StaticFunctions;
1317     definition.callAsFunction = &Functor_callAsFunction;
1318     definition.finalize = &CYFinalize;
1319     Functor_ = JSClassCreate(&definition);
1320
1321     definition = kJSClassDefinitionEmpty;
1322     definition.className = "Pointer";
1323     definition.staticFunctions = Pointer_staticFunctions;
1324     definition.getProperty = &Pointer_getProperty;
1325     definition.setProperty = &Pointer_setProperty;
1326     definition.finalize = &CYFinalize;
1327     Pointer_ = JSClassCreate(&definition);
1328
1329     definition = kJSClassDefinitionEmpty;
1330     definition.className = "Struct";
1331     definition.staticFunctions = Struct_staticFunctions;
1332     definition.getProperty = &Struct_getProperty;
1333     definition.setProperty = &Struct_setProperty;
1334     definition.getPropertyNames = &Struct_getPropertyNames;
1335     definition.finalize = &CYFinalize;
1336     Struct_ = JSClassCreate(&definition);
1337
1338     definition = kJSClassDefinitionEmpty;
1339     definition.className = "Type";
1340     definition.staticValues = Type_staticValues;
1341     definition.staticFunctions = Type_staticFunctions;
1342     definition.getProperty = &Type_getProperty;
1343     definition.callAsFunction = &Type_callAsFunction;
1344     definition.callAsConstructor = &Type_callAsConstructor;
1345     definition.finalize = &CYFinalize;
1346     Type_privateData::Class_ = JSClassCreate(&definition);
1347
1348     definition = kJSClassDefinitionEmpty;
1349     definition.className = "Global";
1350     //definition.getProperty = &Global_getProperty;
1351     Global_ = JSClassCreate(&definition);
1352
1353     Array_s = JSStringCreateWithUTF8CString("Array");
1354     cy_s = JSStringCreateWithUTF8CString("$cy");
1355     length_s = JSStringCreateWithUTF8CString("length");
1356     message_s = JSStringCreateWithUTF8CString("message");
1357     name_s = JSStringCreateWithUTF8CString("name");
1358     pop_s = JSStringCreateWithUTF8CString("pop");
1359     prototype_s = JSStringCreateWithUTF8CString("prototype");
1360     push_s = JSStringCreateWithUTF8CString("push");
1361     splice_s = JSStringCreateWithUTF8CString("splice");
1362     toCYON_s = JSStringCreateWithUTF8CString("toCYON");
1363     toJSON_s = JSStringCreateWithUTF8CString("toJSON");
1364     toPointer_s = JSStringCreateWithUTF8CString("toPointer");
1365     toString_s = JSStringCreateWithUTF8CString("toString");
1366
1367     Result_ = JSStringCreateWithUTF8CString("_");
1368
1369     if (hooks_ != NULL && hooks_->Initialize != NULL)
1370         (*hooks_->Initialize)();
1371 }
1372
1373 void CYThrow(JSContextRef context, JSValueRef value) {
1374     if (value != NULL)
1375         throw CYJSError(context, value);
1376 }
1377
1378 const char *CYJSError::PoolCString(apr_pool_t *pool) const {
1379     // XXX: this used to be CYPoolCString
1380     return CYPoolCCYON(pool, context_, value_);
1381 }
1382
1383 JSValueRef CYJSError::CastJSValue(JSContextRef context) const {
1384     // XXX: what if the context is different?
1385     return value_;
1386 }
1387
1388 JSValueRef CYCastJSError(JSContextRef context, const char *message) {
1389     JSObjectRef Error(CYGetCachedObject(context, CYJSString("Error")));
1390
1391     JSValueRef arguments[1] = {CYCastJSValue(context, message)};
1392
1393     JSValueRef exception(NULL);
1394     JSValueRef value(JSObjectCallAsConstructor(context, Error, 1, arguments, &exception));
1395     CYThrow(context, exception);
1396
1397     return value;
1398 }
1399
1400 JSValueRef CYPoolError::CastJSValue(JSContextRef context) const {
1401     return CYCastJSError(context, message_);
1402 }
1403
1404 CYJSError::CYJSError(JSContextRef context, const char *format, ...) {
1405     _assert(context != NULL);
1406
1407     CYPool pool;
1408
1409     va_list args;
1410     va_start(args, format);
1411     const char *message(apr_pvsprintf(pool, format, args));
1412     va_end(args);
1413
1414     value_ = CYCastJSError(context, message);
1415 }
1416
1417 JSGlobalContextRef CYGetJSContext(JSContextRef context) {
1418     return reinterpret_cast<Context *>(JSObjectGetPrivate(CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s))))->context_;
1419 }
1420
1421 extern "C" void CYSetupContext(JSGlobalContextRef context) {
1422     JSValueRef exception(NULL);
1423
1424     CYInitializeDynamic();
1425
1426     JSObjectRef global(CYGetGlobalObject(context));
1427
1428     JSObjectRef cy(JSObjectMake(context, Context_, new Context(context)));
1429     CYSetProperty(context, global, cy_s, cy, kJSPropertyAttributeDontEnum);
1430
1431 /* Cache Globals {{{ */
1432     JSObjectRef Array(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Array"))));
1433     CYSetProperty(context, cy, CYJSString("Array"), Array);
1434
1435     JSObjectRef Array_prototype(CYCastJSObject(context, CYGetProperty(context, Array, prototype_s)));
1436     CYSetProperty(context, cy, CYJSString("Array_prototype"), Array_prototype);
1437
1438     JSObjectRef Error(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Error"))));
1439     CYSetProperty(context, cy, CYJSString("Error"), Error);
1440
1441     JSObjectRef Function(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Function"))));
1442     CYSetProperty(context, cy, CYJSString("Function"), Function);
1443
1444     JSObjectRef Function_prototype(CYCastJSObject(context, CYGetProperty(context, Function, prototype_s)));
1445     CYSetProperty(context, cy, CYJSString("Function_prototype"), Function_prototype);
1446
1447     JSObjectRef Object(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Object"))));
1448     CYSetProperty(context, cy, CYJSString("Object"), Object);
1449
1450     JSObjectRef Object_prototype(CYCastJSObject(context, CYGetProperty(context, Object, prototype_s)));
1451     CYSetProperty(context, cy, CYJSString("Object_prototype"), Object_prototype);
1452
1453     JSObjectRef String(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("String"))));
1454     CYSetProperty(context, cy, CYJSString("String"), String);
1455
1456     JSObjectRef String_prototype(CYCastJSObject(context, CYGetProperty(context, String, prototype_s)));
1457     CYSetProperty(context, cy, CYJSString("String_prototype"), String_prototype);
1458 /* }}} */
1459
1460     CYSetProperty(context, Array_prototype, toCYON_s, &Array_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1461     CYSetProperty(context, String_prototype, toCYON_s, &String_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1462
1463     JSObjectRef cycript(JSObjectMake(context, NULL, NULL));
1464     CYSetProperty(context, global, CYJSString("Cycript"), cycript);
1465     CYSetProperty(context, cycript, CYJSString("gc"), &Cycript_gc_callAsFunction);
1466
1467     JSObjectRef Functor(JSObjectMakeConstructor(context, Functor_, &Functor_new));
1468     JSObjectSetPrototype(context, CYCastJSObject(context, CYGetProperty(context, Functor, prototype_s)), Function_prototype);
1469     CYSetProperty(context, cycript, CYJSString("Functor"), Functor);
1470
1471     CYSetProperty(context, cycript, CYJSString("Pointer"), JSObjectMakeConstructor(context, Pointer_, &Pointer_new));
1472     CYSetProperty(context, cycript, CYJSString("Type"), JSObjectMakeConstructor(context, Type_privateData::Class_, &Type_new));
1473
1474     JSObjectRef all(JSObjectMake(context, All_, NULL));
1475     CYSetProperty(context, cycript, CYJSString("all"), all);
1476
1477     JSObjectRef alls(JSObjectCallAsConstructor(context, Array, 0, NULL, &exception));
1478     CYThrow(context, exception);
1479     CYSetProperty(context, cycript, CYJSString("alls"), alls);
1480
1481     if (true) {
1482         JSObjectRef last(NULL), curr(global);
1483
1484         goto next; for (JSValueRef next;;) {
1485             if (JSValueIsNull(context, next))
1486                 break;
1487             last = curr;
1488             curr = CYCastJSObject(context, next);
1489           next:
1490             next = JSObjectGetPrototype(context, curr);
1491         }
1492
1493         JSObjectSetPrototype(context, last, all);
1494     }
1495
1496     CYSetProperty(context, global, CYJSString("$cyq"), &$cyq, kJSPropertyAttributeDontEnum);
1497
1498     JSObjectRef System(JSObjectMake(context, NULL, NULL));
1499     CYSetProperty(context, cy, CYJSString("System"), System);
1500
1501     CYSetProperty(context, global, CYJSString("system"), System);
1502     CYSetProperty(context, System, CYJSString("args"), CYJSNull(context));
1503     //CYSetProperty(context, System, CYJSString("global"), global);
1504     CYSetProperty(context, System, CYJSString("print"), &System_print);
1505
1506     if (hooks_ != NULL && hooks_->SetupContext != NULL)
1507         (*hooks_->SetupContext)(context);
1508
1509     CYArrayPush(context, alls, cycript);
1510 }
1511
1512 JSGlobalContextRef CYGetJSContext() {
1513     CYInitializeDynamic();
1514
1515     static JSGlobalContextRef context_;
1516
1517     if (context_ == NULL) {
1518         context_ = JSGlobalContextCreate(Global_);
1519         CYSetupContext(context_);
1520     }
1521
1522     return context_;
1523 }