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 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 void CYExecuteClosure(ffi_cif *cif, void *result, void **arguments, void *arg, JSValueRef (*adapter)(JSContextRef, size_t, JSValueRef[], JSObjectRef)) {
 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(adapter(context, count, values, internal->function_));
 700     CYPoolFFI(NULL, context, internal->signature_.elements[0].type, internal->cif_.rtype, result, value);
 701 }
 702
 703 static JSValueRef FunctionAdapter_(JSContextRef context, size_t count, JSValueRef values[], JSObjectRef function) {
 704     return CYCallAsFunction(context, function, NULL, count, values);
 705 }
 706
 707 static void FunctionClosure_(ffi_cif *cif, void *result, void **arguments, void *arg) {
 708     CYExecuteClosure(cif, result, arguments, arg, &FunctionAdapter_);
 709 }
 710
 711 Closure_privateData *CYMakeFunctor_(JSContextRef context, JSObjectRef function, const char *type, void (*callback)(ffi_cif *, void *, void **, void *)) {
 712     // XXX: in case of exceptions this will leak
 713     // XXX: in point of fact, this may /need/ to leak :(
 714     Closure_privateData *internal(new Closure_privateData(context, function, type));
 715
 716 #if defined(__APPLE__) && defined(__arm__)
 717     void *executable;
 718     ffi_closure *writable(reinterpret_cast<ffi_closure *>(ffi_closure_alloc(sizeof(ffi_closure), &executable)));
 719
 720     ffi_status status(ffi_prep_closure_loc(writable, &internal->cif_, callback, internal, executable));
 721     _assert(status == FFI_OK);
 722
 723     internal->value_ = executable;
 724 #else
 725     ffi_closure *closure((ffi_closure *) _syscall(mmap(
 726         NULL, sizeof(ffi_closure),
 727         PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE,
 728         -1, 0
 729     )));
 730
 731     ffi_status status(ffi_prep_closure(closure, &internal->cif_, callback, internal));
 732     _assert(status == FFI_OK);
 733
 734     _syscall(mprotect(closure, sizeof(*closure), PROT_READ | PROT_EXEC));
 735
 736     internal->value_ = closure;
 737 #endif
 738
 739     return internal;
 740 }
 741
 742 static JSObjectRef CYMakeFunctor(JSContextRef context, JSObjectRef function, const char *type) {
 743     Closure_privateData *internal(CYMakeFunctor_(context, function, type, &FunctionClosure_));
 744     JSObjectRef object(JSObjectMake(context, Functor_, internal));
 745     // XXX: see above notes about needing to leak
 746     JSValueProtect(CYGetJSContext(context), object);
 747     return object;
 748 }
 749
 750 JSObjectRef CYGetCachedObject(JSContextRef context, JSStringRef name) {
 751     return CYCastJSObject(context, CYGetProperty(context, CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s)), name));
 752 }
 753
 754 static JSObjectRef CYMakeFunctor(JSContextRef context, JSValueRef value, const char *type) {
 755     JSObjectRef Function(CYGetCachedObject(context, CYJSString("Function")));
 756
 757     JSValueRef exception(NULL);
 758     bool function(JSValueIsInstanceOfConstructor(context, value, Function, &exception));
 759     CYThrow(context, exception);
 760
 761     if (function) {
 762         JSObjectRef function(CYCastJSObject(context, value));
 763         return CYMakeFunctor(context, function, type);
 764     } else {
 765         void (*function)()(CYCastPointer<void (*)()>(context, value));
 766         return CYMakeFunctor(context, function, type);
 767     }
 768 }
 769
 770 static bool Index_(apr_pool_t *pool, JSContextRef context, Struct_privateData *internal, JSStringRef property, ssize_t &index, uint8_t *&base) {
 771     Type_privateData *typical(internal->type_);
 772     sig::Type *type(typical->type_);
 773     if (type == NULL)
 774         return false;
 775
 776     const char *name(CYPoolCString(pool, context, property));
 777     size_t length(strlen(name));
 778     double number(CYCastDouble(name, length));
 779
 780     size_t count(type->data.signature.count);
 781
 782     if (std::isnan(number)) {
 783         if (property == NULL)
 784             return false;
 785
 786         sig::Element *elements(type->data.signature.elements);
 787
 788         for (size_t local(0); local != count; ++local) {
 789             sig::Element *element(&elements[local]);
 790             if (element->name != NULL && strcmp(name, element->name) == 0) {
 791                 index = local;
 792                 goto base;
 793             }
 794         }
 795
 796         return false;
 797     } else {
 798         index = static_cast<ssize_t>(number);
 799         if (index != number || index < 0 || static_cast<size_t>(index) >= count)
 800             return false;
 801     }
 802
 803   base:
 804     ffi_type **elements(typical->GetFFI()->elements);
 805
 806     base = reinterpret_cast<uint8_t *>(internal->value_);
 807     for (ssize_t local(0); local != index; ++local)
 808         base += elements[local]->size;
 809
 810     return true;
 811 }
 812
 813 static JSValueRef Pointer_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 814     CYPool pool;
 815     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 816
 817     if (JSStringIsEqual(property, length_s))
 818         return internal->length_ == _not(size_t) ? CYJSUndefined(context) : CYCastJSValue(context, internal->length_);
 819
 820     Type_privateData *typical(internal->type_);
 821
 822     if (typical->type_ == NULL)
 823         return NULL;
 824
 825     ssize_t offset;
 826     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 827         offset = 0;
 828     else if (!CYGetOffset(pool, context, property, offset))
 829         return NULL;
 830
 831     ffi_type *ffi(typical->GetFFI());
 832
 833     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 834     base += ffi->size * offset;
 835
 836     JSObjectRef owner(internal->GetOwner() ?: object);
 837     return CYFromFFI(context, typical->type_, ffi, base, false, owner);
 838 } CYCatch }
 839
 840 static bool Pointer_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 841     CYPool pool;
 842     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 843     Type_privateData *typical(internal->type_);
 844
 845     if (typical->type_ == NULL)
 846         return NULL;
 847
 848     ssize_t offset;
 849     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 850         offset = 0;
 851     else if (!CYGetOffset(pool, context, property, offset))
 852         return NULL;
 853
 854     ffi_type *ffi(typical->GetFFI());
 855
 856     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 857     base += ffi->size * offset;
 858
 859     CYPoolFFI(NULL, context, typical->type_, ffi, base, value);
 860     return true;
 861 } CYCatch }
 862
 863 static JSValueRef Struct_callAsFunction_$cya(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 864     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(_this)));
 865     Type_privateData *typical(internal->type_);
 866     return CYMakePointer(context, internal->value_, _not(size_t), typical->type_, typical->ffi_, _this);
 867 }
 868
 869 static JSValueRef Struct_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 870     CYPool pool;
 871     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 872     Type_privateData *typical(internal->type_);
 873
 874     ssize_t index;
 875     uint8_t *base;
 876
 877     if (!Index_(pool, context, internal, property, index, base))
 878         return NULL;
 879
 880     JSObjectRef owner(internal->GetOwner() ?: object);
 881
 882     return CYFromFFI(context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, false, owner);
 883 } CYCatch }
 884
 885 static bool Struct_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 886     CYPool pool;
 887     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 888     Type_privateData *typical(internal->type_);
 889
 890     ssize_t index;
 891     uint8_t *base;
 892
 893     if (!Index_(pool, context, internal, property, index, base))
 894         return false;
 895
 896     CYPoolFFI(NULL, context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, value);
 897     return true;
 898 } CYCatch }
 899
 900 static void Struct_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
 901     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 902     Type_privateData *typical(internal->type_);
 903     sig::Type *type(typical->type_);
 904
 905     if (type == NULL)
 906         return;
 907
 908     size_t count(type->data.signature.count);
 909     sig::Element *elements(type->data.signature.elements);
 910
 911     char number[32];
 912
 913     for (size_t index(0); index != count; ++index) {
 914         const char *name;
 915         name = elements[index].name;
 916
 917         if (name == NULL) {
 918             sprintf(number, "%zu", index);
 919             name = number;
 920         }
 921
 922         JSPropertyNameAccumulatorAddName(names, CYJSString(name));
 923     }
 924 }
 925
 926 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 {
 927     if (setups + count != signature->count - 1)
 928         throw CYJSError(context, "incorrect number of arguments to ffi function");
 929
 930     size_t size(setups + count);
 931     void *values[size];
 932     memcpy(values, setup, sizeof(void *) * setups);
 933
 934     for (size_t index(setups); index != size; ++index) {
 935         sig::Element *element(&signature->elements[index + 1]);
 936         ffi_type *ffi(cif->arg_types[index]);
 937         // XXX: alignment?
 938         values[index] = new(pool) uint8_t[ffi->size];
 939         CYPoolFFI(pool, context, element->type, ffi, values[index], arguments[index - setups]);
 940     }
 941
 942     uint8_t value[cif->rtype->size];
 943
 944     if (hooks_ != NULL && hooks_->CallFunction != NULL)
 945         (*hooks_->CallFunction)(context, cif, function, value, values);
 946     else
 947         ffi_call(cif, function, value, values);
 948
 949     return CYFromFFI(context, signature->elements[0].type, cif->rtype, value, initialize);
 950 } CYCatch }
 951
 952 static JSValueRef Functor_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 953     CYPool pool;
 954     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
 955     return CYCallFunction(pool, context, 0, NULL, count, arguments, false, exception, &internal->signature_, &internal->cif_, internal->GetValue());
 956 }
 957
 958 JSObjectRef CYMakeType(JSContextRef context, const char *type) {
 959     Type_privateData *internal(new Type_privateData(type));
 960     return JSObjectMake(context, Type_privateData::Class_, internal);
 961 }
 962
 963 JSObjectRef CYMakeType(JSContextRef context, sig::Type *type) {
 964     Type_privateData *internal(new Type_privateData(type));
 965     return JSObjectMake(context, Type_privateData::Class_, internal);
 966 }
 967
 968 static void *CYCastSymbol(const char *name) {
 969     return dlsym(RTLD_DEFAULT, name);
 970 }
 971
 972 static JSValueRef All_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 973     JSObjectRef global(CYGetGlobalObject(context));
 974     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
 975     JSObjectRef alls(CYCastJSObject(context, CYGetProperty(context, cycript, CYJSString("alls"))));
 976
 977     for (size_t i(0), count(CYArrayLength(context, alls)); i != count; ++i)
 978         if (JSObjectRef space = CYCastJSObject(context, CYArrayGet(context, alls, count - i - 1)))
 979             if (JSValueRef value = CYGetProperty(context, space, property))
 980                 if (!JSValueIsUndefined(context, value))
 981                     return value;
 982
 983     CYPool pool;
 984     CYUTF8String name(CYPoolUTF8String(pool, context, property));
 985
 986     size_t length(name.size);
 987     char keyed[length + 2];
 988     memcpy(keyed + 1, name.data, length + 1);
 989
 990     static const char *modes = "0124";
 991     for (size_t i(0); i != 4; ++i) {
 992         char mode(modes[i]);
 993         keyed[0] = mode;
 994
 995         if (CYBridgeEntry *entry = CYBridgeHash(keyed, length + 1))
 996             switch (mode) {
 997                 case '0':
 998                     return JSEvaluateScript(CYGetJSContext(context), CYJSString(entry->value_), NULL, NULL, 0, NULL);
 999
1000                 case '1':
1001                     if (void (*symbol)() = reinterpret_cast<void (*)()>(CYCastSymbol(name.data)))
1002                         return CYMakeFunctor(context, symbol, entry->value_, &entry->cache_);
1003                     else return NULL;
1004
1005                 case '2':
1006                     if (void *symbol = CYCastSymbol(name.data)) {
1007                         // XXX: this is horrendously inefficient
1008                         sig::Signature signature;
1009                         sig::Parse(pool, &signature, entry->value_, &Structor_);
1010                         ffi_cif cif;
1011                         sig::sig_ffi_cif(pool, &sig::ObjectiveC, &signature, &cif);
1012                         return CYFromFFI(context, signature.elements[0].type, cif.rtype, symbol);
1013                     } else return NULL;
1014
1015                 // XXX: implement case 3
1016                 case '4':
1017                     return CYMakeType(context, entry->value_);
1018             }
1019     }
1020
1021     return NULL;
1022 } CYCatch }
1023
1024 static void All_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
1025     JSObjectRef global(CYGetGlobalObject(context));
1026     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
1027     JSObjectRef alls(CYCastJSObject(context, CYGetProperty(context, cycript, CYJSString("alls"))));
1028
1029     for (size_t i(0), count(CYArrayLength(context, alls)); i != count; ++i)
1030         if (JSObjectRef space = CYCastJSObject(context, CYArrayGet(context, alls, count - i - 1))) {
1031             JSPropertyNameArrayRef subset(JSObjectCopyPropertyNames(context, space));
1032             for (size_t index(0), count(JSPropertyNameArrayGetCount(subset)); index != count; ++index)
1033                 JSPropertyNameAccumulatorAddName(names, JSPropertyNameArrayGetNameAtIndex(subset, index));
1034             JSPropertyNameArrayRelease(subset);
1035         }
1036 }
1037
1038 static JSObjectRef Pointer_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1039     if (count != 2)
1040         throw CYJSError(context, "incorrect number of arguments to Pointer constructor");
1041
1042     CYPool pool;
1043
1044     void *value(CYCastPointer<void *>(context, arguments[0]));
1045     const char *type(CYPoolCString(pool, context, arguments[1]));
1046
1047     sig::Signature signature;
1048     sig::Parse(pool, &signature, type, &Structor_);
1049
1050     return CYMakePointer(context, value, _not(size_t), signature.elements[0].type, NULL, NULL);
1051 } CYCatch }
1052
1053 static JSObjectRef Type_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1054     if (count != 1)
1055         throw CYJSError(context, "incorrect number of arguments to Type constructor");
1056     CYPool pool;
1057     const char *type(CYPoolCString(pool, context, arguments[0]));
1058     return CYMakeType(context, type);
1059 } CYCatch }
1060
1061 static JSValueRef Type_callAsFunction_arrayOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1062     if (count != 1)
1063         throw CYJSError(context, "incorrect number of arguments to Type.arrayOf");
1064     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1065
1066     CYPool pool;
1067     size_t index(CYGetIndex(pool, context, CYJSString(context, arguments[0])));
1068     if (index == _not(size_t))
1069         throw CYJSError(context, "invalid array size used with Type.arrayOf");
1070
1071     sig::Type type;
1072     type.name = NULL;
1073     type.flags = 0;
1074
1075     type.primitive = sig::array_P;
1076     type.data.data.type = internal->type_;
1077     type.data.data.size = index;
1078
1079     return CYMakeType(context, &type);
1080 } CYCatch }
1081
1082 static JSValueRef Type_callAsFunction_constant(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.constant");
1085     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1086
1087     sig::Type type(*internal->type_);
1088     type.flags |= JOC_TYPE_CONST;
1089     return CYMakeType(context, &type);
1090 } CYCatch }
1091
1092 static JSValueRef Type_callAsFunction_pointerTo(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1093     if (count != 0)
1094         throw CYJSError(context, "incorrect number of arguments to Type.pointerTo");
1095     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1096
1097     sig::Type type;
1098     type.name = NULL;
1099     type.flags = 0;
1100
1101     type.primitive = sig::pointer_P;
1102     type.data.data.type = internal->type_;
1103     type.data.data.size = 0;
1104
1105     return CYMakeType(context, &type);
1106 } CYCatch }
1107
1108 static JSValueRef Type_callAsFunction_withName(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1109     if (count != 1)
1110         throw CYJSError(context, "incorrect number of arguments to Type.withName");
1111     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1112
1113     CYPool pool;
1114     const char *name(CYPoolCString(pool, context, arguments[0]));
1115
1116     sig::Type type(*internal->type_);
1117     type.name = name;
1118     return CYMakeType(context, &type);
1119 } CYCatch }
1120
1121 static JSValueRef Type_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1122     if (count != 1)
1123         throw CYJSError(context, "incorrect number of arguments to type cast function");
1124     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1125
1126     sig::Type *type(internal->type_);
1127     ffi_type *ffi(internal->GetFFI());
1128     // XXX: alignment?
1129     uint8_t value[ffi->size];
1130     CYPool pool;
1131     CYPoolFFI(pool, context, type, ffi, value, arguments[0]);
1132     return CYFromFFI(context, type, ffi, value);
1133 } CYCatch }
1134
1135 static JSObjectRef Type_callAsConstructor(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1136     if (count != 0)
1137         throw CYJSError(context, "incorrect number of arguments to Type allocator");
1138     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1139
1140     sig::Type *type(internal->type_);
1141     size_t length;
1142
1143     if (type->primitive != sig::array_P)
1144         length = _not(size_t);
1145     else {
1146         length = type->data.data.size;
1147         type = type->data.data.type;
1148     }
1149
1150     void *value(malloc(internal->GetFFI()->size));
1151     return CYMakePointer(context, value, length, type, NULL, NULL);
1152 } CYCatch }
1153
1154 static JSObjectRef Functor_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1155     if (count != 2)
1156         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1157     CYPool pool;
1158     const char *type(CYPoolCString(pool, context, arguments[1]));
1159     return CYMakeFunctor(context, arguments[0], type);
1160 } CYCatch }
1161
1162 static JSValueRef CYValue_callAsFunction_valueOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1163     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1164     return CYCastJSValue(context, reinterpret_cast<uintptr_t>(internal->value_));
1165 } CYCatch }
1166
1167 static JSValueRef CYValue_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1168     return CYValue_callAsFunction_valueOf(context, object, _this, count, arguments, exception);
1169 }
1170
1171 static JSValueRef CYValue_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1172     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1173     char string[32];
1174     sprintf(string, "%p", internal->value_);
1175     return CYCastJSValue(context, string);
1176 } CYCatch }
1177
1178 static JSValueRef Pointer_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1179     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(_this)));
1180     if (internal->length_ != _not(size_t)) {
1181         JSObjectRef Array(CYGetCachedObject(context, Array_s));
1182         JSObjectRef toCYON(CYCastJSObject(context, CYGetProperty(context, Array, toCYON_s)));
1183         return CYCallAsFunction(context, toCYON, _this, count, arguments);
1184     } else {
1185         char string[32];
1186         sprintf(string, "%p", internal->value_);
1187         return CYCastJSValue(context, string);
1188     }
1189 } CYCatch }
1190
1191 static JSValueRef Type_getProperty_alignment(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) {
1192     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1193     return CYCastJSValue(context, internal->GetFFI()->alignment);
1194 }
1195
1196 static JSValueRef Type_getProperty_name(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) {
1197     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1198     return CYCastJSValue(context, internal->type_->name);
1199 }
1200
1201 static JSValueRef Type_getProperty_size(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) {
1202     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1203     return CYCastJSValue(context, internal->GetFFI()->size);
1204 }
1205
1206 static JSValueRef Type_callAsFunction_toString(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1207     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1208     CYPool pool;
1209     const char *type(sig::Unparse(pool, internal->type_));
1210     return CYCastJSValue(context, CYJSString(type));
1211 } CYCatch }
1212
1213 static JSValueRef Type_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1214     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1215     CYPool pool;
1216     const char *type(sig::Unparse(pool, internal->type_));
1217     std::ostringstream str;
1218     CYStringify(str, type, strlen(type));
1219     char *cyon(apr_pstrcat(pool, "new Type(", str.str().c_str(), ")", NULL));
1220     return CYCastJSValue(context, CYJSString(cyon));
1221 } CYCatch }
1222
1223 static JSValueRef Type_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1224     return Type_callAsFunction_toString(context, object, _this, count, arguments, exception);
1225 }
1226
1227 static JSStaticFunction Pointer_staticFunctions[4] = {
1228     {"toCYON", &Pointer_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1229     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1230     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1231     {NULL, NULL, 0}
1232 };
1233
1234 static JSStaticFunction Struct_staticFunctions[2] = {
1235     {"$cya", &Struct_callAsFunction_$cya, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1236     {NULL, NULL, 0}
1237 };
1238
1239 static JSStaticFunction Functor_staticFunctions[4] = {
1240     {"toCYON", &CYValue_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1241     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1242     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1243     {NULL, NULL, 0}
1244 };
1245
1246 namespace cy {
1247     JSStaticFunction const * const Functor::StaticFunctions = Functor_staticFunctions;
1248 }
1249
1250 static JSStaticValue Type_staticValues[4] = {
1251     {"alignment", &Type_getProperty_alignment, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1252     {"name", &Type_getProperty_name, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1253     {"size", &Type_getProperty_size, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1254     {NULL, NULL, NULL, 0}
1255 };
1256
1257 static JSStaticFunction Type_staticFunctions[8] = {
1258     {"arrayOf", &Type_callAsFunction_arrayOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1259     {"constant", &Type_callAsFunction_constant, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1260     {"pointerTo", &Type_callAsFunction_pointerTo, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1261     {"withName", &Type_callAsFunction_withName, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1262     {"toCYON", &Type_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1263     {"toJSON", &Type_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1264     {"toString", &Type_callAsFunction_toString, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1265     {NULL, NULL, 0}
1266 };
1267
1268 static JSObjectRef (*JSObjectMakeArray$)(JSContextRef, size_t, const JSValueRef[], JSValueRef *);
1269
1270 void CYSetArgs(int argc, const char *argv[]) {
1271     JSContextRef context(CYGetJSContext());
1272     JSValueRef args[argc];
1273     for (int i(0); i != argc; ++i)
1274         args[i] = CYCastJSValue(context, argv[i]);
1275
1276     JSObjectRef array;
1277     if (JSObjectMakeArray$ != NULL) {
1278         JSValueRef exception(NULL);
1279         array = (*JSObjectMakeArray$)(context, argc, args, &exception);
1280         CYThrow(context, exception);
1281     } else {
1282         JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array")));
1283         JSValueRef value(CYCallAsFunction(context, Array, NULL, argc, args));
1284         array = CYCastJSObject(context, value);
1285     }
1286
1287     JSObjectRef System(CYGetCachedObject(context, CYJSString("System")));
1288     CYSetProperty(context, System, CYJSString("args"), array);
1289 }
1290
1291 JSObjectRef CYGetGlobalObject(JSContextRef context) {
1292     return JSContextGetGlobalObject(context);
1293 }
1294
1295 const char *CYExecute(apr_pool_t *pool, CYUTF8String code) {
1296     JSContextRef context(CYGetJSContext());
1297     JSValueRef exception(NULL), result;
1298
1299     void *handle;
1300     if (hooks_ != NULL && hooks_->ExecuteStart != NULL)
1301         handle = (*hooks_->ExecuteStart)(context);
1302     else
1303         handle = NULL;
1304
1305     const char *json;
1306
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     try {
1320         json = CYPoolCCYON(pool, context, result, &exception);
1321     } catch (const char *error) {
1322         return error;
1323     }
1324
1325     if (exception != NULL)
1326         goto error;
1327
1328     CYSetProperty(context, CYGetGlobalObject(context), Result_, result);
1329
1330     if (hooks_ != NULL && hooks_->ExecuteEnd != NULL)
1331         (*hooks_->ExecuteEnd)(context, handle);
1332     return json;
1333 }
1334
1335 extern "C" void CydgetSetupContext(JSGlobalContextRef context) {
1336     CYSetupContext(context);
1337 }
1338
1339 static bool initialized_ = false;
1340
1341 void CYInitializeDynamic() {
1342     if (!initialized_)
1343         initialized_ = true;
1344     else return;
1345
1346     CYInitializeStatic();
1347
1348     JSObjectMakeArray$ = reinterpret_cast<JSObjectRef (*)(JSContextRef, size_t, const JSValueRef[], JSValueRef *)>(dlsym(RTLD_DEFAULT, "JSObjectMakeArray"));
1349
1350     JSClassDefinition definition;
1351
1352     definition = kJSClassDefinitionEmpty;
1353     definition.className = "All";
1354     definition.getProperty = &All_getProperty;
1355     definition.getPropertyNames = &All_getPropertyNames;
1356     All_ = JSClassCreate(&definition);
1357
1358     definition = kJSClassDefinitionEmpty;
1359     definition.className = "Context";
1360     definition.finalize = &CYFinalize;
1361     Context_ = JSClassCreate(&definition);
1362
1363     definition = kJSClassDefinitionEmpty;
1364     definition.className = "Functor";
1365     definition.staticFunctions = cy::Functor::StaticFunctions;
1366     definition.callAsFunction = &Functor_callAsFunction;
1367     definition.finalize = &CYFinalize;
1368     Functor_ = JSClassCreate(&definition);
1369
1370     definition = kJSClassDefinitionEmpty;
1371     definition.className = "Pointer";
1372     definition.staticFunctions = Pointer_staticFunctions;
1373     definition.getProperty = &Pointer_getProperty;
1374     definition.setProperty = &Pointer_setProperty;
1375     definition.finalize = &CYFinalize;
1376     Pointer_ = JSClassCreate(&definition);
1377
1378     definition = kJSClassDefinitionEmpty;
1379     definition.className = "Struct";
1380     definition.staticFunctions = Struct_staticFunctions;
1381     definition.getProperty = &Struct_getProperty;
1382     definition.setProperty = &Struct_setProperty;
1383     definition.getPropertyNames = &Struct_getPropertyNames;
1384     definition.finalize = &CYFinalize;
1385     Struct_ = JSClassCreate(&definition);
1386
1387     definition = kJSClassDefinitionEmpty;
1388     definition.className = "Type";
1389     definition.staticValues = Type_staticValues;
1390     definition.staticFunctions = Type_staticFunctions;
1391     definition.callAsFunction = &Type_callAsFunction;
1392     definition.callAsConstructor = &Type_callAsConstructor;
1393     definition.finalize = &CYFinalize;
1394     Type_privateData::Class_ = JSClassCreate(&definition);
1395
1396     definition = kJSClassDefinitionEmpty;
1397     definition.className = "Global";
1398     //definition.getProperty = &Global_getProperty;
1399     Global_ = JSClassCreate(&definition);
1400
1401     Array_s = JSStringCreateWithUTF8CString("Array");
1402     cy_s = JSStringCreateWithUTF8CString("$cy");
1403     length_s = JSStringCreateWithUTF8CString("length");
1404     message_s = JSStringCreateWithUTF8CString("message");
1405     name_s = JSStringCreateWithUTF8CString("name");
1406     pop_s = JSStringCreateWithUTF8CString("pop");
1407     prototype_s = JSStringCreateWithUTF8CString("prototype");
1408     push_s = JSStringCreateWithUTF8CString("push");
1409     splice_s = JSStringCreateWithUTF8CString("splice");
1410     toCYON_s = JSStringCreateWithUTF8CString("toCYON");
1411     toJSON_s = JSStringCreateWithUTF8CString("toJSON");
1412     toPointer_s = JSStringCreateWithUTF8CString("toPointer");
1413     toString_s = JSStringCreateWithUTF8CString("toString");
1414
1415     Result_ = JSStringCreateWithUTF8CString("_");
1416
1417     if (hooks_ != NULL && hooks_->Initialize != NULL)
1418         (*hooks_->Initialize)();
1419 }
1420
1421 void CYThrow(JSContextRef context, JSValueRef value) {
1422     if (value != NULL)
1423         throw CYJSError(context, value);
1424 }
1425
1426 const char *CYJSError::PoolCString(apr_pool_t *pool) const {
1427     // XXX: this used to be CYPoolCString
1428     return CYPoolCCYON(pool, context_, value_);
1429 }
1430
1431 JSValueRef CYJSError::CastJSValue(JSContextRef context) const {
1432     // XXX: what if the context is different?
1433     return value_;
1434 }
1435
1436 JSValueRef CYCastJSError(JSContextRef context, const char *message) {
1437     JSObjectRef Error(CYGetCachedObject(context, CYJSString("Error")));
1438
1439     JSValueRef arguments[1] = {CYCastJSValue(context, message)};
1440
1441     JSValueRef exception(NULL);
1442     JSValueRef value(JSObjectCallAsConstructor(context, Error, 1, arguments, &exception));
1443     CYThrow(context, exception);
1444
1445     return value;
1446 }
1447
1448 JSValueRef CYPoolError::CastJSValue(JSContextRef context) const {
1449     return CYCastJSError(context, message_);
1450 }
1451
1452 CYJSError::CYJSError(JSContextRef context, const char *format, ...) {
1453     _assert(context != NULL);
1454
1455     CYPool pool;
1456
1457     va_list args;
1458     va_start(args, format);
1459     const char *message(apr_pvsprintf(pool, format, args));
1460     va_end(args);
1461
1462     value_ = CYCastJSError(context, message);
1463 }
1464
1465 JSGlobalContextRef CYGetJSContext(JSContextRef context) {
1466     return reinterpret_cast<Context *>(JSObjectGetPrivate(CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s))))->context_;
1467 }
1468
1469 extern "C" void CYSetupContext(JSGlobalContextRef context) {
1470     JSValueRef exception(NULL);
1471
1472     CYInitializeDynamic();
1473
1474     JSObjectRef global(CYGetGlobalObject(context));
1475
1476     JSObjectRef cy(JSObjectMake(context, Context_, new Context(context)));
1477     CYSetProperty(context, global, cy_s, cy, kJSPropertyAttributeDontEnum);
1478
1479 /* Cache Globals {{{ */
1480     JSObjectRef Array(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Array"))));
1481     CYSetProperty(context, cy, CYJSString("Array"), Array);
1482
1483     JSObjectRef Array_prototype(CYCastJSObject(context, CYGetProperty(context, Array, prototype_s)));
1484     CYSetProperty(context, cy, CYJSString("Array_prototype"), Array_prototype);
1485
1486     JSObjectRef Error(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Error"))));
1487     CYSetProperty(context, cy, CYJSString("Error"), Error);
1488
1489     JSObjectRef Function(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Function"))));
1490     CYSetProperty(context, cy, CYJSString("Function"), Function);
1491
1492     JSObjectRef Function_prototype(CYCastJSObject(context, CYGetProperty(context, Function, prototype_s)));
1493     CYSetProperty(context, cy, CYJSString("Function_prototype"), Function_prototype);
1494
1495     JSObjectRef Object(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Object"))));
1496     CYSetProperty(context, cy, CYJSString("Object"), Object);
1497
1498     JSObjectRef Object_prototype(CYCastJSObject(context, CYGetProperty(context, Object, prototype_s)));
1499     CYSetProperty(context, cy, CYJSString("Object_prototype"), Object_prototype);
1500
1501     JSObjectRef String(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("String"))));
1502     CYSetProperty(context, cy, CYJSString("String"), String);
1503
1504     JSObjectRef String_prototype(CYCastJSObject(context, CYGetProperty(context, String, prototype_s)));
1505     CYSetProperty(context, cy, CYJSString("String_prototype"), String_prototype);
1506 /* }}} */
1507
1508     CYSetProperty(context, Array_prototype, toCYON_s, &Array_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1509     CYSetProperty(context, String_prototype, toCYON_s, &String_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1510
1511     JSObjectRef cycript(JSObjectMake(context, NULL, NULL));
1512     CYSetProperty(context, global, CYJSString("Cycript"), cycript);
1513     CYSetProperty(context, cycript, CYJSString("gc"), &Cycript_gc_callAsFunction);
1514
1515     JSObjectRef Functor(JSObjectMakeConstructor(context, Functor_, &Functor_new));
1516     JSObjectSetPrototype(context, CYCastJSObject(context, CYGetProperty(context, Functor, prototype_s)), Function_prototype);
1517     CYSetProperty(context, cycript, CYJSString("Functor"), Functor);
1518
1519     CYSetProperty(context, cycript, CYJSString("Pointer"), JSObjectMakeConstructor(context, Pointer_, &Pointer_new));
1520     CYSetProperty(context, cycript, CYJSString("Type"), JSObjectMakeConstructor(context, Type_privateData::Class_, &Type_new));
1521
1522     JSObjectRef all(JSObjectMake(context, All_, NULL));
1523     CYSetProperty(context, cycript, CYJSString("all"), all);
1524
1525     JSObjectRef alls(JSObjectCallAsConstructor(context, Array, 0, NULL, &exception));
1526     CYThrow(context, exception);
1527     CYSetProperty(context, cycript, CYJSString("alls"), alls);
1528
1529     if (true) {
1530         JSObjectRef last(NULL), curr(global);
1531
1532         goto next; for (JSValueRef next;;) {
1533             if (JSValueIsNull(context, next))
1534                 break;
1535             last = curr;
1536             curr = CYCastJSObject(context, next);
1537           next:
1538             next = JSObjectGetPrototype(context, curr);
1539         }
1540
1541         JSObjectSetPrototype(context, last, all);
1542     }
1543
1544     CYSetProperty(context, global, CYJSString("$cyq"), &$cyq, kJSPropertyAttributeDontEnum);
1545
1546     JSObjectRef System(JSObjectMake(context, NULL, NULL));
1547     CYSetProperty(context, cy, CYJSString("System"), System);
1548
1549     CYSetProperty(context, global, CYJSString("system"), System);
1550     CYSetProperty(context, System, CYJSString("args"), CYJSNull(context));
1551     //CYSetProperty(context, System, CYJSString("global"), global);
1552     CYSetProperty(context, System, CYJSString("print"), &System_print);
1553
1554     if (hooks_ != NULL && hooks_->SetupContext != NULL)
1555         (*hooks_->SetupContext)(context);
1556
1557     CYArrayPush(context, alls, cycript);
1558 }
1559
1560 JSGlobalContextRef CYGetJSContext() {
1561     CYInitializeDynamic();
1562
1563     static JSGlobalContextRef context_;
1564
1565     if (context_ == NULL) {
1566         context_ = JSGlobalContextCreate(Global_);
1567         CYSetupContext(context_);
1568     }
1569
1570     return context_;
1571 }