Execute.cpp

   1 /* Cycript - Inlining/Optimizing JavaScript Compiler
   2  * Copyright (C) 2009  Jay Freeman (saurik)
   3 */
   4
   5 /* Modified BSD License {{{ */
   6 /*
   7  *        Redistribution and use in source and binary
   8  * forms, with or without modification, are permitted
   9  * provided that the following conditions are met:
  10  *
  11  * 1. Redistributions of source code must retain the
  12  *    above copyright notice, this list of conditions
  13  *    and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the
  15  *    above copyright notice, this list of conditions
  16  *    and the following disclaimer in the documentation
  17  *    and/or other materials provided with the
  18  *    distribution.
  19  * 3. The name of the author may not be used to endorse
  20  *    or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS''
  24  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
  25  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  26  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
  28  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  29  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  30  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  31  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  34  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  35  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  36  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  37 */
  38 /* }}} */
  39
  40 #include <sqlite3.h>
  41
  42 #include "Internal.hpp"
  43
  44 #include <dlfcn.h>
  45 #include <iconv.h>
  46
  47 #include "cycript.hpp"
  48
  49 #include "sig/parse.hpp"
  50 #include "sig/ffi_type.hpp"
  51
  52 #include "Pooling.hpp"
  53
  54 #include <sys/mman.h>
  55
  56 #include <iostream>
  57 #include <ext/stdio_filebuf.h>
  58 #include <set>
  59 #include <map>
  60 #include <iomanip>
  61 #include <sstream>
  62 #include <cmath>
  63
  64 #include "Parser.hpp"
  65 #include "Cycript.tab.hh"
  66
  67 #include "Error.hpp"
  68 #include "JavaScript.hpp"
  69 #include "String.hpp"
  70
  71 char *sqlite3_column_pooled(apr_pool_t *pool, sqlite3_stmt *stmt, int n) {
  72     if (const unsigned char *value = sqlite3_column_text(stmt, n))
  73         return apr_pstrdup(pool, (const char *) value);
  74     else return NULL;
  75 }
  76
  77 struct CYHooks *hooks_;
  78
  79 /* JavaScript Properties {{{ */
  80 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, size_t index) {
  81     JSValueRef exception(NULL);
  82     JSValueRef value(JSObjectGetPropertyAtIndex(context, object, index, &exception));
  83     CYThrow(context, exception);
  84     return value;
  85 }
  86
  87 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, JSStringRef name) {
  88     JSValueRef exception(NULL);
  89     JSValueRef value(JSObjectGetProperty(context, object, name, &exception));
  90     CYThrow(context, exception);
  91     return value;
  92 }
  93
  94 void CYSetProperty(JSContextRef context, JSObjectRef object, size_t index, JSValueRef value) {
  95     JSValueRef exception(NULL);
  96     JSObjectSetPropertyAtIndex(context, object, index, value, &exception);
  97     CYThrow(context, exception);
  98 }
  99
 100 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef value, JSPropertyAttributes attributes) {
 101     JSValueRef exception(NULL);
 102     JSObjectSetProperty(context, object, name, value, attributes, &exception);
 103     CYThrow(context, exception);
 104 }
 105
 106 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef (*callback)(JSContextRef, JSObjectRef, JSObjectRef, size_t, const JSValueRef[], JSValueRef *), JSPropertyAttributes attributes) {
 107     CYSetProperty(context, object, name, JSObjectMakeFunctionWithCallback(context, name, callback), attributes);
 108 }
 109 /* }}} */
 110 /* JavaScript Strings {{{ */
 111 JSStringRef CYCopyJSString(const char *value) {
 112     return value == NULL ? NULL : JSStringCreateWithUTF8CString(value);
 113 }
 114
 115 JSStringRef CYCopyJSString(JSStringRef value) {
 116     return value == NULL ? NULL : JSStringRetain(value);
 117 }
 118
 119 JSStringRef CYCopyJSString(CYUTF8String value) {
 120     // XXX: this is very wrong; it needs to convert to UTF16 and then create from there
 121     return CYCopyJSString(value.data);
 122 }
 123
 124 JSStringRef CYCopyJSString(JSContextRef context, JSValueRef value) {
 125     if (JSValueIsNull(context, value))
 126         return NULL;
 127     JSValueRef exception(NULL);
 128     JSStringRef string(JSValueToStringCopy(context, value, &exception));
 129     CYThrow(context, exception);
 130     return string;
 131 }
 132
 133 static CYUTF16String CYCastUTF16String(JSStringRef value) {
 134     return CYUTF16String(JSStringGetCharactersPtr(value), JSStringGetLength(value));
 135 }
 136
 137 CYUTF8String CYPoolUTF8String(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 138     return CYPoolUTF8String(pool, CYCastUTF16String(value));
 139 }
 140
 141 const char *CYPoolCString(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 142     CYUTF8String utf8(CYPoolUTF8String(pool, context, value));
 143     _assert(memchr(utf8.data, '\0', utf8.size) == NULL);
 144     return utf8.data;
 145 }
 146
 147 const char *CYPoolCString(apr_pool_t *pool, JSContextRef context, JSValueRef value) {
 148     return JSValueIsNull(context, value) ? NULL : CYPoolCString(pool, context, CYJSString(context, value));
 149 }
 150 /* }}} */
 151 /* Index Offsets {{{ */
 152 size_t CYGetIndex(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 153     return CYGetIndex(CYPoolUTF8String(pool, context, value));
 154 }
 155 /* }}} */
 156
 157 static JSClassRef All_;
 158 static JSClassRef Context_;
 159 static JSClassRef Functor_;
 160 static JSClassRef Global_;
 161 static JSClassRef Pointer_;
 162 static JSClassRef Struct_;
 163
 164 JSStringRef Array_s;
 165 JSStringRef cy_s;
 166 JSStringRef length_s;
 167 JSStringRef message_s;
 168 JSStringRef name_s;
 169 JSStringRef pop_s;
 170 JSStringRef prototype_s;
 171 JSStringRef push_s;
 172 JSStringRef splice_s;
 173 JSStringRef toCYON_s;
 174 JSStringRef toJSON_s;
 175
 176 static JSStringRef Result_;
 177
 178 sqlite3 *Bridge_;
 179
 180 void CYFinalize(JSObjectRef object) {
 181     delete reinterpret_cast<CYData *>(JSObjectGetPrivate(object));
 182 }
 183
 184 void Structor_(apr_pool_t *pool, sig::Type *&type) {
 185     if (
 186         type->primitive == sig::pointer_P &&
 187         type->data.data.type != NULL &&
 188         type->data.data.type->primitive == sig::struct_P &&
 189         strcmp(type->data.data.type->name, "_objc_class") == 0
 190     ) {
 191         type->primitive = sig::typename_P;
 192         type->data.data.type = NULL;
 193         return;
 194     }
 195
 196     if (type->primitive != sig::struct_P || type->name == NULL)
 197         return;
 198
 199     sqlite3_stmt *statement;
 200
 201     _sqlcall(sqlite3_prepare(Bridge_,
 202         "select "
 203             "\"bridge\".\"mode\", "
 204             "\"bridge\".\"value\" "
 205         "from \"bridge\" "
 206         "where"
 207             " \"bridge\".\"mode\" in (3, 4) and"
 208             " \"bridge\".\"name\" = ?"
 209         " limit 1"
 210     , -1, &statement, NULL));
 211
 212     _sqlcall(sqlite3_bind_text(statement, 1, type->name, -1, SQLITE_STATIC));
 213
 214     int mode;
 215     const char *value;
 216
 217     if (_sqlcall(sqlite3_step(statement)) == SQLITE_DONE) {
 218         mode = -1;
 219         value = NULL;
 220     } else {
 221         mode = sqlite3_column_int(statement, 0);
 222         value = sqlite3_column_pooled(pool, statement, 1);
 223     }
 224
 225     _sqlcall(sqlite3_finalize(statement));
 226
 227     switch (mode) {
 228         default:
 229             _assert(false);
 230         case -1:
 231             break;
 232
 233         case 3: {
 234             sig::Parse(pool, &type->data.signature, value, &Structor_);
 235         } break;
 236
 237         case 4: {
 238             sig::Signature signature;
 239             sig::Parse(pool, &signature, value, &Structor_);
 240             type = signature.elements[0].type;
 241         } break;
 242     }
 243 }
 244
 245 JSClassRef Type_privateData::Class_;
 246
 247 struct Context :
 248     CYData
 249 {
 250     JSGlobalContextRef context_;
 251
 252     Context(JSGlobalContextRef context) :
 253         context_(context)
 254     {
 255     }
 256 };
 257
 258 struct Pointer :
 259     CYOwned
 260 {
 261     Type_privateData *type_;
 262     size_t length_;
 263
 264     Pointer(void *value, JSContextRef context, JSObjectRef owner, size_t length, sig::Type *type) :
 265         CYOwned(value, context, owner),
 266         type_(new(pool_) Type_privateData(type)),
 267         length_(length)
 268     {
 269     }
 270 };
 271
 272 struct Struct_privateData :
 273     CYOwned
 274 {
 275     Type_privateData *type_;
 276
 277     Struct_privateData(JSContextRef context, JSObjectRef owner) :
 278         CYOwned(NULL, context, owner)
 279     {
 280     }
 281 };
 282
 283 typedef std::map<const char *, Type_privateData *, CYCStringLess> TypeMap;
 284 static TypeMap Types_;
 285
 286 JSObjectRef CYMakeStruct(JSContextRef context, void *data, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 287     Struct_privateData *internal(new Struct_privateData(context, owner));
 288     apr_pool_t *pool(internal->pool_);
 289     Type_privateData *typical(new(pool) Type_privateData(type, ffi));
 290     internal->type_ = typical;
 291
 292     if (owner != NULL)
 293         internal->value_ = data;
 294     else {
 295         size_t size(typical->GetFFI()->size);
 296         void *copy(apr_palloc(internal->pool_, size));
 297         memcpy(copy, data, size);
 298         internal->value_ = copy;
 299     }
 300
 301     return JSObjectMake(context, Struct_, internal);
 302 }
 303
 304 JSValueRef CYCastJSValue(JSContextRef context, bool value) {
 305     return JSValueMakeBoolean(context, value);
 306 }
 307
 308 JSValueRef CYCastJSValue(JSContextRef context, double value) {
 309     return JSValueMakeNumber(context, value);
 310 }
 311
 312 #define CYCastJSValue_(Type_) \
 313     JSValueRef CYCastJSValue(JSContextRef context, Type_ value) { \
 314         return JSValueMakeNumber(context, static_cast<double>(value)); \
 315     }
 316
 317 CYCastJSValue_(int)
 318 CYCastJSValue_(unsigned int)
 319 CYCastJSValue_(long int)
 320 CYCastJSValue_(long unsigned int)
 321 CYCastJSValue_(long long int)
 322 CYCastJSValue_(long long unsigned int)
 323
 324 JSValueRef CYJSUndefined(JSContextRef context) {
 325     return JSValueMakeUndefined(context);
 326 }
 327
 328 double CYCastDouble(JSContextRef context, JSValueRef value) {
 329     JSValueRef exception(NULL);
 330     double number(JSValueToNumber(context, value, &exception));
 331     CYThrow(context, exception);
 332     return number;
 333 }
 334
 335 bool CYCastBool(JSContextRef context, JSValueRef value) {
 336     return JSValueToBoolean(context, value);
 337 }
 338
 339 JSValueRef CYJSNull(JSContextRef context) {
 340     return JSValueMakeNull(context);
 341 }
 342
 343 JSValueRef CYCastJSValue(JSContextRef context, JSStringRef value) {
 344     return value == NULL ? CYJSNull(context) : JSValueMakeString(context, value);
 345 }
 346
 347 JSValueRef CYCastJSValue(JSContextRef context, const char *value) {
 348     return CYCastJSValue(context, CYJSString(value));
 349 }
 350
 351 JSObjectRef CYCastJSObject(JSContextRef context, JSValueRef value) {
 352     JSValueRef exception(NULL);
 353     JSObjectRef object(JSValueToObject(context, value, &exception));
 354     CYThrow(context, exception);
 355     return object;
 356 }
 357
 358 JSValueRef CYCallAsFunction(JSContextRef context, JSObjectRef function, JSObjectRef _this, size_t count, const JSValueRef arguments[]) {
 359     JSValueRef exception(NULL);
 360     JSValueRef value(JSObjectCallAsFunction(context, function, _this, count, arguments, &exception));
 361     CYThrow(context, exception);
 362     return value;
 363 }
 364
 365 bool CYIsCallable(JSContextRef context, JSValueRef value) {
 366     return value != NULL && JSValueIsObject(context, value) && JSObjectIsFunction(context, (JSObjectRef) value);
 367 }
 368
 369 static JSValueRef System_print(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 370     if (count == 0)
 371         printf("\n");
 372     else {
 373         CYPool pool;
 374         printf("%s\n", CYPoolCString(pool, context, arguments[0]));
 375     }
 376
 377     return CYJSUndefined(context);
 378 } CYCatch }
 379
 380 static size_t Nonce_(0);
 381
 382 static JSValueRef $cyq(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 383     CYPool pool;
 384     const char *name(apr_psprintf(pool, "%s%"APR_SIZE_T_FMT"", CYPoolCString(pool, context, arguments[0]), Nonce_++));
 385     return CYCastJSValue(context, name);
 386 }
 387
 388 static JSValueRef Cycript_gc_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 389     JSGarbageCollect(context);
 390     return CYJSUndefined(context);
 391 }
 392
 393 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSValueRef value, JSValueRef *exception) { CYTry {
 394     switch (JSType type = JSValueGetType(context, value)) {
 395         case kJSTypeUndefined:
 396             return "undefined";
 397         case kJSTypeNull:
 398             return "null";
 399         case kJSTypeBoolean:
 400             return CYCastBool(context, value) ? "true" : "false";
 401
 402         case kJSTypeNumber: {
 403             std::ostringstream str;
 404             CYNumerify(str, CYCastDouble(context, value));
 405             std::string value(str.str());
 406             return apr_pstrmemdup(pool, value.c_str(), value.size());
 407         } break;
 408
 409         case kJSTypeString: {
 410             std::ostringstream str;
 411             CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, value)));
 412             CYStringify(str, string.data, string.size);
 413             std::string value(str.str());
 414             return apr_pstrmemdup(pool, value.c_str(), value.size());
 415         } break;
 416
 417         case kJSTypeObject:
 418             return CYPoolCCYON(pool, context, (JSObjectRef) value);
 419         default:
 420             throw CYJSError(context, "JSValueGetType() == 0x%x", type);
 421     }
 422 } CYCatch }
 423
 424 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSValueRef value) {
 425     JSValueRef exception(NULL);
 426     const char *cyon(CYPoolCCYON(pool, context, value, &exception));
 427     CYThrow(context, exception);
 428     return cyon;
 429 }
 430
 431 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSObjectRef object) {
 432     JSValueRef toCYON(CYGetProperty(context, object, toCYON_s));
 433     if (CYIsCallable(context, toCYON)) {
 434         JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toCYON, object, 0, NULL));
 435         _assert(value != NULL);
 436         return CYPoolCString(pool, context, value);
 437     }
 438
 439     JSValueRef toJSON(CYGetProperty(context, object, toJSON_s));
 440     if (CYIsCallable(context, toJSON)) {
 441         JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 442         JSValueRef exception(NULL);
 443         const char *cyon(CYPoolCCYON(pool, context, CYCallAsFunction(context, (JSObjectRef) toJSON, object, 1, arguments), &exception));
 444         CYThrow(context, exception);
 445         return cyon;
 446     }
 447
 448     std::ostringstream str;
 449
 450     str << '{';
 451
 452     // XXX: this is, sadly, going to leak
 453     JSPropertyNameArrayRef names(JSObjectCopyPropertyNames(context, object));
 454
 455     bool comma(false);
 456
 457     for (size_t index(0), count(JSPropertyNameArrayGetCount(names)); index != count; ++index) {
 458         JSStringRef name(JSPropertyNameArrayGetNameAtIndex(names, index));
 459         JSValueRef value(CYGetProperty(context, object, name));
 460
 461         if (comma)
 462             str << ',';
 463         else
 464             comma = true;
 465
 466         CYUTF8String string(CYPoolUTF8String(pool, context, name));
 467         if (CYIsKey(string))
 468             str << string.data;
 469         else
 470             CYStringify(str, string.data, string.size);
 471
 472         str << ':' << CYPoolCCYON(pool, context, value);
 473     }
 474
 475     str << '}';
 476
 477     JSPropertyNameArrayRelease(names);
 478
 479     std::string string(str.str());
 480     return apr_pstrmemdup(pool, string.c_str(), string.size());
 481 }
 482
 483 static JSValueRef Array_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 484     CYPool pool;
 485     std::ostringstream str;
 486
 487     str << '[';
 488
 489     JSValueRef length(CYGetProperty(context, _this, length_s));
 490     bool comma(false);
 491
 492     for (size_t index(0), count(CYCastDouble(context, length)); index != count; ++index) {
 493         JSValueRef value(CYGetProperty(context, _this, index));
 494
 495         if (comma)
 496             str << ',';
 497         else
 498             comma = true;
 499
 500         if (!JSValueIsUndefined(context, value))
 501             str << CYPoolCCYON(pool, context, value);
 502         else {
 503             str << ',';
 504             comma = false;
 505         }
 506     }
 507
 508     str << ']';
 509
 510     std::string value(str.str());
 511     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 512 } CYCatch }
 513
 514 JSObjectRef CYMakePointer(JSContextRef context, void *pointer, size_t length, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 515     Pointer *internal(new Pointer(pointer, context, owner, length, type));
 516     return JSObjectMake(context, Pointer_, internal);
 517 }
 518
 519 static JSObjectRef CYMakeFunctor(JSContextRef context, void (*function)(), const char *type) {
 520     cy::Functor *internal(new cy::Functor(type, function));
 521     return JSObjectMake(context, Functor_, internal);
 522 }
 523
 524 static bool CYGetOffset(apr_pool_t *pool, JSContextRef context, JSStringRef value, ssize_t &index) {
 525     return CYGetOffset(CYPoolCString(pool, context, value), index);
 526 }
 527
 528 void *CYCastPointer_(JSContextRef context, JSValueRef value) {
 529     switch (JSValueGetType(context, value)) {
 530         case kJSTypeNull:
 531             return NULL;
 532         /*case kJSTypeObject:
 533             if (JSValueIsObjectOfClass(context, value, Pointer_)) {
 534                 Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate((JSObjectRef) value)));
 535                 return internal->value_;
 536             }*/
 537         default:
 538             double number(CYCastDouble(context, value));
 539             if (std::isnan(number))
 540                 throw CYJSError(context, "cannot convert value to pointer");
 541             return reinterpret_cast<void *>(static_cast<uintptr_t>(static_cast<long long>(number)));
 542     }
 543 }
 544
 545 void CYPoolFFI(apr_pool_t *pool, JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, JSValueRef value) {
 546     switch (type->primitive) {
 547         case sig::boolean_P:
 548             *reinterpret_cast<bool *>(data) = JSValueToBoolean(context, value);
 549         break;
 550
 551 #define CYPoolFFI_(primitive, native) \
 552         case sig::primitive ## _P: \
 553             *reinterpret_cast<native *>(data) = CYCastDouble(context, value); \
 554         break;
 555
 556         CYPoolFFI_(uchar, unsigned char)
 557         CYPoolFFI_(char, char)
 558         CYPoolFFI_(ushort, unsigned short)
 559         CYPoolFFI_(short, short)
 560         CYPoolFFI_(ulong, unsigned long)
 561         CYPoolFFI_(long, long)
 562         CYPoolFFI_(uint, unsigned int)
 563         CYPoolFFI_(int, int)
 564         CYPoolFFI_(ulonglong, unsigned long long)
 565         CYPoolFFI_(longlong, long long)
 566         CYPoolFFI_(float, float)
 567         CYPoolFFI_(double, double)
 568
 569         case sig::array_P: {
 570             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 571             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 572             for (size_t index(0); index != type->data.data.size; ++index) {
 573                 ffi_type *field(ffi->elements[index]);
 574
 575                 JSValueRef rhs;
 576                 if (aggregate == NULL)
 577                     rhs = value;
 578                 else {
 579                     rhs = CYGetProperty(context, aggregate, index);
 580                     if (JSValueIsUndefined(context, rhs))
 581                         throw CYJSError(context, "unable to extract array value");
 582                 }
 583
 584                 CYPoolFFI(pool, context, type->data.data.type, field, base, rhs);
 585                 // XXX: alignment?
 586                 base += field->size;
 587             }
 588         } break;
 589
 590         case sig::pointer_P:
 591             *reinterpret_cast<void **>(data) = CYCastPointer<void *>(context, value);
 592         break;
 593
 594         case sig::string_P:
 595             *reinterpret_cast<const char **>(data) = CYPoolCString(pool, context, value);
 596         break;
 597
 598         case sig::struct_P: {
 599             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 600             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 601             for (size_t index(0); index != type->data.signature.count; ++index) {
 602                 sig::Element *element(&type->data.signature.elements[index]);
 603                 ffi_type *field(ffi->elements[index]);
 604
 605                 JSValueRef rhs;
 606                 if (aggregate == NULL)
 607                     rhs = value;
 608                 else {
 609                     rhs = CYGetProperty(context, aggregate, index);
 610                     if (JSValueIsUndefined(context, rhs)) {
 611                         if (element->name != NULL)
 612                             rhs = CYGetProperty(context, aggregate, CYJSString(element->name));
 613                         else
 614                             goto undefined;
 615                         if (JSValueIsUndefined(context, rhs)) undefined:
 616                             throw CYJSError(context, "unable to extract structure value");
 617                     }
 618                 }
 619
 620                 CYPoolFFI(pool, context, element->type, field, base, rhs);
 621                 // XXX: alignment?
 622                 base += field->size;
 623             }
 624         } break;
 625
 626         case sig::void_P:
 627         break;
 628
 629         default:
 630             if (hooks_ != NULL && hooks_->PoolFFI != NULL)
 631                 if ((*hooks_->PoolFFI)(pool, context, type, ffi, data, value))
 632                     return;
 633
 634             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 635     }
 636 }
 637
 638 JSValueRef CYFromFFI(JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, bool initialize, JSObjectRef owner) {
 639     switch (type->primitive) {
 640         case sig::boolean_P:
 641             return CYCastJSValue(context, *reinterpret_cast<bool *>(data));
 642
 643 #define CYFromFFI_(primitive, native) \
 644         case sig::primitive ## _P: \
 645             return CYCastJSValue(context, *reinterpret_cast<native *>(data)); \
 646
 647         CYFromFFI_(uchar, unsigned char)
 648         CYFromFFI_(char, char)
 649         CYFromFFI_(ushort, unsigned short)
 650         CYFromFFI_(short, short)
 651         CYFromFFI_(ulong, unsigned long)
 652         CYFromFFI_(long, long)
 653         CYFromFFI_(uint, unsigned int)
 654         CYFromFFI_(int, int)
 655         CYFromFFI_(ulonglong, unsigned long long)
 656         CYFromFFI_(longlong, long long)
 657         CYFromFFI_(float, float)
 658         CYFromFFI_(double, double)
 659
 660         case sig::array_P:
 661             if (void *pointer = data)
 662                 return CYMakePointer(context, pointer, type->data.data.size, type->data.data.type, NULL, owner);
 663             else goto null;
 664
 665         case sig::pointer_P:
 666             if (void *pointer = *reinterpret_cast<void **>(data))
 667                 return CYMakePointer(context, pointer, _not(size_t), type->data.data.type, NULL, owner);
 668             else goto null;
 669
 670         case sig::string_P:
 671             if (char *utf8 = *reinterpret_cast<char **>(data))
 672                 return CYCastJSValue(context, utf8);
 673             else goto null;
 674
 675         case sig::struct_P:
 676             return CYMakeStruct(context, data, type, ffi, owner);
 677         case sig::void_P:
 678             return CYJSUndefined(context);
 679
 680         null:
 681             return CYJSNull(context);
 682         default:
 683             if (hooks_ != NULL && hooks_->FromFFI != NULL)
 684                 if (JSValueRef value = (*hooks_->FromFFI)(context, type, ffi, data, initialize, owner))
 685                     return value;
 686
 687             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 688     }
 689 }
 690
 691 static void FunctionClosure_(ffi_cif *cif, void *result, void **arguments, void *arg) {
 692     Closure_privateData *internal(reinterpret_cast<Closure_privateData *>(arg));
 693
 694     JSContextRef context(internal->context_);
 695
 696     size_t count(internal->cif_.nargs);
 697     JSValueRef values[count];
 698
 699     for (size_t index(0); index != count; ++index)
 700         values[index] = CYFromFFI(context, internal->signature_.elements[1 + index].type, internal->cif_.arg_types[index], arguments[index]);
 701
 702     JSValueRef value(CYCallAsFunction(context, internal->function_, NULL, count, values));
 703     CYPoolFFI(NULL, context, internal->signature_.elements[0].type, internal->cif_.rtype, result, value);
 704 }
 705
 706 Closure_privateData *CYMakeFunctor_(JSContextRef context, JSObjectRef function, const char *type, void (*callback)(ffi_cif *, void *, void **, void *)) {
 707     // XXX: in case of exceptions this will leak
 708     // XXX: in point of fact, this may /need/ to leak :(
 709     Closure_privateData *internal(new Closure_privateData(context, function, type));
 710
 711     ffi_closure *closure((ffi_closure *) _syscall(mmap(
 712         NULL, sizeof(ffi_closure),
 713         PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE,
 714         -1, 0
 715     )));
 716
 717     ffi_status status(ffi_prep_closure(closure, &internal->cif_, callback, internal));
 718     _assert(status == FFI_OK);
 719
 720     _syscall(mprotect(closure, sizeof(*closure), PROT_READ | PROT_EXEC));
 721
 722     internal->value_ = closure;
 723
 724     return internal;
 725 }
 726
 727 static JSObjectRef CYMakeFunctor(JSContextRef context, JSObjectRef function, const char *type) {
 728     Closure_privateData *internal(CYMakeFunctor_(context, function, type, &FunctionClosure_));
 729     JSObjectRef object(JSObjectMake(context, Functor_, internal));
 730     // XXX: see above notes about needing to leak
 731     JSValueProtect(CYGetJSContext(context), object);
 732     return object;
 733 }
 734
 735 JSObjectRef CYGetCachedObject(JSContextRef context, JSStringRef name) {
 736     return CYCastJSObject(context, CYGetProperty(context, CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s)), name));
 737 }
 738
 739 static JSObjectRef CYMakeFunctor(JSContextRef context, JSValueRef value, const char *type) {
 740     JSObjectRef Function(CYGetCachedObject(context, CYJSString("Function")));
 741
 742     JSValueRef exception(NULL);
 743     bool function(JSValueIsInstanceOfConstructor(context, value, Function, &exception));
 744     CYThrow(context, exception);
 745
 746     if (function) {
 747         JSObjectRef function(CYCastJSObject(context, value));
 748         return CYMakeFunctor(context, function, type);
 749     } else {
 750         void (*function)()(CYCastPointer<void (*)()>(context, value));
 751         return CYMakeFunctor(context, function, type);
 752     }
 753 }
 754
 755 static bool Index_(apr_pool_t *pool, JSContextRef context, Struct_privateData *internal, JSStringRef property, ssize_t &index, uint8_t *&base) {
 756     Type_privateData *typical(internal->type_);
 757     sig::Type *type(typical->type_);
 758     if (type == NULL)
 759         return false;
 760
 761     const char *name(CYPoolCString(pool, context, property));
 762     size_t length(strlen(name));
 763     double number(CYCastDouble(name, length));
 764
 765     size_t count(type->data.signature.count);
 766
 767     if (std::isnan(number)) {
 768         if (property == NULL)
 769             return false;
 770
 771         sig::Element *elements(type->data.signature.elements);
 772
 773         for (size_t local(0); local != count; ++local) {
 774             sig::Element *element(&elements[local]);
 775             if (element->name != NULL && strcmp(name, element->name) == 0) {
 776                 index = local;
 777                 goto base;
 778             }
 779         }
 780
 781         return false;
 782     } else {
 783         index = static_cast<ssize_t>(number);
 784         if (index != number || index < 0 || static_cast<size_t>(index) >= count)
 785             return false;
 786     }
 787
 788   base:
 789     ffi_type **elements(typical->GetFFI()->elements);
 790
 791     base = reinterpret_cast<uint8_t *>(internal->value_);
 792     for (ssize_t local(0); local != index; ++local)
 793         base += elements[local]->size;
 794
 795     return true;
 796 }
 797
 798 static JSValueRef Pointer_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 799     CYPool pool;
 800     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 801
 802     if (JSStringIsEqual(property, length_s))
 803         return internal->length_ == _not(size_t) ? CYJSUndefined(context) : CYCastJSValue(context, internal->length_);
 804
 805     Type_privateData *typical(internal->type_);
 806
 807     if (typical->type_ == NULL)
 808         return NULL;
 809
 810     ssize_t offset;
 811     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 812         offset = 0;
 813     else if (!CYGetOffset(pool, context, property, offset))
 814         return NULL;
 815
 816     ffi_type *ffi(typical->GetFFI());
 817
 818     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 819     base += ffi->size * offset;
 820
 821     JSObjectRef owner(internal->GetOwner() ?: object);
 822     return CYFromFFI(context, typical->type_, ffi, base, false, owner);
 823 } CYCatch }
 824
 825 static bool Pointer_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 826     CYPool pool;
 827     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 828     Type_privateData *typical(internal->type_);
 829
 830     if (typical->type_ == NULL)
 831         return NULL;
 832
 833     ssize_t offset;
 834     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 835         offset = 0;
 836     else if (!CYGetOffset(pool, context, property, offset))
 837         return NULL;
 838
 839     ffi_type *ffi(typical->GetFFI());
 840
 841     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 842     base += ffi->size * offset;
 843
 844     CYPoolFFI(NULL, context, typical->type_, ffi, base, value);
 845     return true;
 846 } CYCatch }
 847
 848 static JSValueRef Struct_callAsFunction_$cya(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 849     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(_this)));
 850     Type_privateData *typical(internal->type_);
 851     return CYMakePointer(context, internal->value_, _not(size_t), typical->type_, typical->ffi_, _this);
 852 }
 853
 854 static JSValueRef Struct_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 855     CYPool pool;
 856     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 857     Type_privateData *typical(internal->type_);
 858
 859     ssize_t index;
 860     uint8_t *base;
 861
 862     if (!Index_(pool, context, internal, property, index, base))
 863         return NULL;
 864
 865     JSObjectRef owner(internal->GetOwner() ?: object);
 866
 867     return CYFromFFI(context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, false, owner);
 868 } CYCatch }
 869
 870 static bool Struct_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 871     CYPool pool;
 872     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 873     Type_privateData *typical(internal->type_);
 874
 875     ssize_t index;
 876     uint8_t *base;
 877
 878     if (!Index_(pool, context, internal, property, index, base))
 879         return false;
 880
 881     CYPoolFFI(NULL, context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, value);
 882     return true;
 883 } CYCatch }
 884
 885 static void Struct_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
 886     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 887     Type_privateData *typical(internal->type_);
 888     sig::Type *type(typical->type_);
 889
 890     if (type == NULL)
 891         return;
 892
 893     size_t count(type->data.signature.count);
 894     sig::Element *elements(type->data.signature.elements);
 895
 896     char number[32];
 897
 898     for (size_t index(0); index != count; ++index) {
 899         const char *name;
 900         name = elements[index].name;
 901
 902         if (name == NULL) {
 903             sprintf(number, "%zu", index);
 904             name = number;
 905         }
 906
 907         JSPropertyNameAccumulatorAddName(names, CYJSString(name));
 908     }
 909 }
 910
 911 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 {
 912     if (setups + count != signature->count - 1)
 913         throw CYJSError(context, "incorrect number of arguments to ffi function");
 914
 915     size_t size(setups + count);
 916     void *values[size];
 917     memcpy(values, setup, sizeof(void *) * setups);
 918
 919     for (size_t index(setups); index != size; ++index) {
 920         sig::Element *element(&signature->elements[index + 1]);
 921         ffi_type *ffi(cif->arg_types[index]);
 922         // XXX: alignment?
 923         values[index] = new(pool) uint8_t[ffi->size];
 924         CYPoolFFI(pool, context, element->type, ffi, values[index], arguments[index - setups]);
 925     }
 926
 927     uint8_t value[cif->rtype->size];
 928
 929     if (hooks_ != NULL && hooks_->CallFunction != NULL)
 930         (*hooks_->CallFunction)(context, cif, function, value, values);
 931     else
 932         ffi_call(cif, function, value, values);
 933
 934     return CYFromFFI(context, signature->elements[0].type, cif->rtype, value, initialize);
 935 } CYCatch }
 936
 937 static JSValueRef Functor_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 938     CYPool pool;
 939     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
 940     return CYCallFunction(pool, context, 0, NULL, count, arguments, false, exception, &internal->signature_, &internal->cif_, internal->GetValue());
 941 }
 942
 943 static JSObjectRef CYMakeType(JSContextRef context, const char *type) {
 944     Type_privateData *internal(new Type_privateData(type));
 945     return JSObjectMake(context, Type_privateData::Class_, internal);
 946 }
 947
 948 static JSObjectRef CYMakeType(JSContextRef context, sig::Type *type) {
 949     Type_privateData *internal(new Type_privateData(type));
 950     return JSObjectMake(context, Type_privateData::Class_, internal);
 951 }
 952
 953 static void *CYCastSymbol(const char *name) {
 954     return dlsym(RTLD_DEFAULT, name);
 955 }
 956
 957 static JSValueRef All_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 958     JSObjectRef global(CYGetGlobalObject(context));
 959     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
 960     if (JSValueRef value = CYGetProperty(context, cycript, property))
 961         if (!JSValueIsUndefined(context, value))
 962             return value;
 963
 964     CYPool pool;
 965     CYUTF8String name(CYPoolUTF8String(pool, context, property));
 966
 967     if (hooks_ != NULL && hooks_->RuntimeProperty != NULL)
 968         if (JSValueRef value = (*hooks_->RuntimeProperty)(context, name))
 969             return value;
 970
 971     sqlite3_stmt *statement;
 972
 973     _sqlcall(sqlite3_prepare(Bridge_,
 974         "select "
 975             "\"bridge\".\"mode\", "
 976             "\"bridge\".\"value\" "
 977         "from \"bridge\" "
 978         "where"
 979             " \"bridge\".\"name\" = ?"
 980         " limit 1"
 981     , -1, &statement, NULL));
 982
 983     _sqlcall(sqlite3_bind_text(statement, 1, name.data, name.size, SQLITE_STATIC));
 984
 985     int mode;
 986     const char *value;
 987
 988     if (_sqlcall(sqlite3_step(statement)) == SQLITE_DONE) {
 989         mode = -1;
 990         value = NULL;
 991     } else {
 992         mode = sqlite3_column_int(statement, 0);
 993         value = sqlite3_column_pooled(pool, statement, 1);
 994     }
 995
 996     _sqlcall(sqlite3_finalize(statement));
 997
 998     switch (mode) {
 999         default:
1000             CYThrow("invalid mode from bridge table: %d", mode);
1001         case -1:
1002             return NULL;
1003
1004         case 0:
1005             return JSEvaluateScript(CYGetJSContext(context), CYJSString(value), NULL, NULL, 0, NULL);
1006
1007         case 1:
1008             if (void (*symbol)() = reinterpret_cast<void (*)()>(CYCastSymbol(name.data)))
1009                 return CYMakeFunctor(context, symbol, value);
1010             else return NULL;
1011
1012         case 2:
1013             if (void *symbol = CYCastSymbol(name.data)) {
1014                 // XXX: this is horrendously inefficient
1015                 sig::Signature signature;
1016                 sig::Parse(pool, &signature, value, &Structor_);
1017                 ffi_cif cif;
1018                 sig::sig_ffi_cif(pool, &sig::ObjectiveC, &signature, &cif);
1019                 return CYFromFFI(context, signature.elements[0].type, cif.rtype, symbol);
1020             } else return NULL;
1021
1022         // XXX: implement case 3
1023         case 4:
1024             return CYMakeType(context, value);
1025     }
1026 } CYCatch }
1027
1028 static JSObjectRef Pointer_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1029     if (count != 2)
1030         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1031
1032     CYPool pool;
1033
1034     void *value(CYCastPointer<void *>(context, arguments[0]));
1035     const char *type(CYPoolCString(pool, context, arguments[1]));
1036
1037     sig::Signature signature;
1038     sig::Parse(pool, &signature, type, &Structor_);
1039
1040     return CYMakePointer(context, value, _not(size_t), signature.elements[0].type, NULL, NULL);
1041 } CYCatch }
1042
1043 static JSObjectRef Type_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1044     if (count != 1)
1045         throw CYJSError(context, "incorrect number of arguments to Type constructor");
1046     CYPool pool;
1047     const char *type(CYPoolCString(pool, context, arguments[0]));
1048     return CYMakeType(context, type);
1049 } CYCatch }
1050
1051 static JSValueRef Type_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1052     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1053
1054     sig::Type type;
1055
1056     if (JSStringIsEqualToUTF8CString(property, "$cyi")) {
1057         type.primitive = sig::pointer_P;
1058         type.data.data.size = 0;
1059     } else {
1060         CYPool pool;
1061         size_t index(CYGetIndex(pool, context, property));
1062         if (index == _not(size_t))
1063             return NULL;
1064         type.primitive = sig::array_P;
1065         type.data.data.size = index;
1066     }
1067
1068     type.name = NULL;
1069     type.flags = 0;
1070
1071     type.data.data.type = internal->type_;
1072
1073     return CYMakeType(context, &type);
1074 } CYCatch }
1075
1076 static JSValueRef Type_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1077     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1078
1079     if (count != 1)
1080         throw CYJSError(context, "incorrect number of arguments to type cast function");
1081     sig::Type *type(internal->type_);
1082     ffi_type *ffi(internal->GetFFI());
1083     // XXX: alignment?
1084     uint8_t value[ffi->size];
1085     CYPool pool;
1086     CYPoolFFI(pool, context, type, ffi, value, arguments[0]);
1087     return CYFromFFI(context, type, ffi, value);
1088 } CYCatch }
1089
1090 static JSObjectRef Type_callAsConstructor(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1091     if (count != 0)
1092         throw CYJSError(context, "incorrect number of arguments to type cast function");
1093     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1094
1095     sig::Type *type(internal->type_);
1096     size_t length;
1097
1098     if (type->primitive != sig::array_P)
1099         length = _not(size_t);
1100     else {
1101         length = type->data.data.size;
1102         type = type->data.data.type;
1103     }
1104
1105     void *value(malloc(internal->GetFFI()->size));
1106     return CYMakePointer(context, value, length, type, NULL, NULL);
1107 } CYCatch }
1108
1109 static JSObjectRef Functor_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1110     if (count != 2)
1111         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1112     CYPool pool;
1113     const char *type(CYPoolCString(pool, context, arguments[1]));
1114     return CYMakeFunctor(context, arguments[0], type);
1115 } CYCatch }
1116
1117 static JSValueRef CYValue_callAsFunction_valueOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1118     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1119     return CYCastJSValue(context, reinterpret_cast<uintptr_t>(internal->value_));
1120 } CYCatch }
1121
1122 static JSValueRef CYValue_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1123     return CYValue_callAsFunction_valueOf(context, object, _this, count, arguments, exception);
1124 }
1125
1126 static JSValueRef CYValue_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1127     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1128     char string[32];
1129     sprintf(string, "%p", internal->value_);
1130     return CYCastJSValue(context, string);
1131 } CYCatch }
1132
1133 static JSValueRef Pointer_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1134     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(_this)));
1135     if (internal->length_ != _not(size_t)) {
1136         JSObjectRef Array(CYGetCachedObject(context, Array_s));
1137         JSObjectRef toCYON(CYCastJSObject(context, CYGetProperty(context, Array, toCYON_s)));
1138         return CYCallAsFunction(context, toCYON, _this, count, arguments);
1139     } else {
1140         char string[32];
1141         sprintf(string, "%p", internal->value_);
1142         return CYCastJSValue(context, string);
1143     }
1144 } CYCatch }
1145
1146 static JSValueRef Type_callAsFunction_toString(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1147     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1148     CYPool pool;
1149     const char *type(sig::Unparse(pool, internal->type_));
1150     return CYCastJSValue(context, CYJSString(type));
1151 } CYCatch }
1152
1153 static JSValueRef Type_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1154     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1155     CYPool pool;
1156     const char *type(sig::Unparse(pool, internal->type_));
1157     size_t size(strlen(type));
1158     char *cyon(new(pool) char[12 + size + 1]);
1159     memcpy(cyon, "new Type(\"", 10);
1160     cyon[12 + size] = '\0';
1161     cyon[12 + size - 2] = '"';
1162     cyon[12 + size - 1] = ')';
1163     memcpy(cyon + 10, type, size);
1164     return CYCastJSValue(context, CYJSString(cyon));
1165 } CYCatch }
1166
1167 static JSValueRef Type_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1168     return Type_callAsFunction_toString(context, object, _this, count, arguments, exception);
1169 }
1170
1171 static JSStaticFunction Pointer_staticFunctions[4] = {
1172     {"toCYON", &Pointer_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1173     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1174     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1175     {NULL, NULL, 0}
1176 };
1177
1178 static JSStaticFunction Struct_staticFunctions[2] = {
1179     {"$cya", &Struct_callAsFunction_$cya, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1180     {NULL, NULL, 0}
1181 };
1182
1183 static JSStaticFunction Functor_staticFunctions[4] = {
1184     {"toCYON", &CYValue_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1185     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1186     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1187     {NULL, NULL, 0}
1188 };
1189
1190 namespace cy {
1191     JSStaticFunction const * const Functor::StaticFunctions = Functor_staticFunctions;
1192 }
1193
1194 static JSStaticFunction Type_staticFunctions[4] = {
1195     {"toCYON", &Type_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1196     {"toJSON", &Type_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1197     {"toString", &Type_callAsFunction_toString, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1198     {NULL, NULL, 0}
1199 };
1200
1201 static JSObjectRef (*JSObjectMakeArray$)(JSContextRef, size_t, const JSValueRef[], JSValueRef *);
1202
1203 void CYSetArgs(int argc, const char *argv[]) {
1204     JSContextRef context(CYGetJSContext());
1205     JSValueRef args[argc];
1206     for (int i(0); i != argc; ++i)
1207         args[i] = CYCastJSValue(context, argv[i]);
1208
1209     JSObjectRef array;
1210     if (JSObjectMakeArray$ != NULL) {
1211         JSValueRef exception(NULL);
1212         array = (*JSObjectMakeArray$)(context, argc, args, &exception);
1213         CYThrow(context, exception);
1214     } else {
1215         JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array")));
1216         JSValueRef value(CYCallAsFunction(context, Array, NULL, argc, args));
1217         array = CYCastJSObject(context, value);
1218     }
1219
1220     JSObjectRef System(CYGetCachedObject(context, CYJSString("System")));
1221     CYSetProperty(context, System, CYJSString("args"), array);
1222 }
1223
1224 JSObjectRef CYGetGlobalObject(JSContextRef context) {
1225     return JSContextGetGlobalObject(context);
1226 }
1227
1228 const char *CYExecute(apr_pool_t *pool, const char *code) {
1229     JSContextRef context(CYGetJSContext());
1230     JSValueRef exception(NULL), result;
1231
1232     void *handle;
1233     if (hooks_ != NULL && hooks_->ExecuteStart != NULL)
1234         handle = (*hooks_->ExecuteStart)(context);
1235     else
1236         handle = NULL;
1237
1238     const char *json;
1239
1240     try {
1241         result = JSEvaluateScript(context, CYJSString(code), NULL, NULL, 0, &exception);
1242     } catch (const char *error) {
1243         return error;
1244     }
1245
1246     if (exception != NULL) { error:
1247         result = exception;
1248         exception = NULL;
1249     }
1250
1251     if (JSValueIsUndefined(context, result))
1252         return NULL;
1253
1254     try {
1255         json = CYPoolCCYON(pool, context, result, &exception);
1256     } catch (const char *error) {
1257         return error;
1258     }
1259
1260     if (exception != NULL)
1261         goto error;
1262
1263     CYSetProperty(context, CYGetGlobalObject(context), Result_, result);
1264
1265     if (hooks_ != NULL && hooks_->ExecuteEnd != NULL)
1266         (*hooks_->ExecuteEnd)(context, handle);
1267     return json;
1268 }
1269
1270 extern "C" void CydgetSetupContext(JSGlobalContextRef context) {
1271     CYSetupContext(context);
1272 }
1273
1274 static bool initialized_ = false;
1275
1276 void CYInitializeDynamic() {
1277     if (!initialized_)
1278         initialized_ = true;
1279     else return;
1280
1281     CYInitializeStatic();
1282
1283     _sqlcall(sqlite3_open("/usr/lib/libcycript.db", &Bridge_));
1284
1285     JSObjectMakeArray$ = reinterpret_cast<JSObjectRef (*)(JSContextRef, size_t, const JSValueRef[], JSValueRef *)>(dlsym(RTLD_DEFAULT, "JSObjectMakeArray"));
1286
1287     JSClassDefinition definition;
1288
1289     definition = kJSClassDefinitionEmpty;
1290     definition.className = "All";
1291     definition.getProperty = &All_getProperty;
1292     All_ = JSClassCreate(&definition);
1293
1294     definition = kJSClassDefinitionEmpty;
1295     definition.className = "Context";
1296     definition.finalize = &CYFinalize;
1297     Context_ = JSClassCreate(&definition);
1298
1299     definition = kJSClassDefinitionEmpty;
1300     definition.className = "Functor";
1301     definition.staticFunctions = cy::Functor::StaticFunctions;
1302     definition.callAsFunction = &Functor_callAsFunction;
1303     definition.finalize = &CYFinalize;
1304     Functor_ = JSClassCreate(&definition);
1305
1306     definition = kJSClassDefinitionEmpty;
1307     definition.className = "Pointer";
1308     definition.staticFunctions = Pointer_staticFunctions;
1309     definition.getProperty = &Pointer_getProperty;
1310     definition.setProperty = &Pointer_setProperty;
1311     definition.finalize = &CYFinalize;
1312     Pointer_ = JSClassCreate(&definition);
1313
1314     definition = kJSClassDefinitionEmpty;
1315     definition.className = "Struct";
1316     definition.staticFunctions = Struct_staticFunctions;
1317     definition.getProperty = &Struct_getProperty;
1318     definition.setProperty = &Struct_setProperty;
1319     definition.getPropertyNames = &Struct_getPropertyNames;
1320     definition.finalize = &CYFinalize;
1321     Struct_ = JSClassCreate(&definition);
1322
1323     definition = kJSClassDefinitionEmpty;
1324     definition.className = "Type";
1325     definition.staticFunctions = Type_staticFunctions;
1326     definition.getProperty = &Type_getProperty;
1327     definition.callAsFunction = &Type_callAsFunction;
1328     definition.callAsConstructor = &Type_callAsConstructor;
1329     definition.finalize = &CYFinalize;
1330     Type_privateData::Class_ = JSClassCreate(&definition);
1331
1332     definition = kJSClassDefinitionEmpty;
1333     //definition.getProperty = &Global_getProperty;
1334     Global_ = JSClassCreate(&definition);
1335
1336     Array_s = JSStringCreateWithUTF8CString("Array");
1337     cy_s = JSStringCreateWithUTF8CString("$cy");
1338     length_s = JSStringCreateWithUTF8CString("length");
1339     message_s = JSStringCreateWithUTF8CString("message");
1340     name_s = JSStringCreateWithUTF8CString("name");
1341     pop_s = JSStringCreateWithUTF8CString("pop");
1342     prototype_s = JSStringCreateWithUTF8CString("prototype");
1343     push_s = JSStringCreateWithUTF8CString("push");
1344     splice_s = JSStringCreateWithUTF8CString("splice");
1345     toCYON_s = JSStringCreateWithUTF8CString("toCYON");
1346     toJSON_s = JSStringCreateWithUTF8CString("toJSON");
1347
1348     Result_ = JSStringCreateWithUTF8CString("_");
1349
1350     if (hooks_ != NULL && hooks_->Initialize != NULL)
1351         (*hooks_->Initialize)();
1352 }
1353
1354 void CYThrow(JSContextRef context, JSValueRef value) {
1355     if (value != NULL)
1356         throw CYJSError(context, value);
1357 }
1358
1359 const char *CYJSError::PoolCString(apr_pool_t *pool) const {
1360     // XXX: this used to be CYPoolCString
1361     return CYPoolCCYON(pool, context_, value_);
1362 }
1363
1364 JSValueRef CYJSError::CastJSValue(JSContextRef context) const {
1365     // XXX: what if the context is different?
1366     return value_;
1367 }
1368
1369 JSValueRef CYCastJSError(JSContextRef context, const char *message) {
1370     JSObjectRef Error(CYGetCachedObject(context, CYJSString("Error")));
1371
1372     JSValueRef arguments[1] = {CYCastJSValue(context, message)};
1373
1374     JSValueRef exception(NULL);
1375     JSValueRef value(JSObjectCallAsConstructor(context, Error, 1, arguments, &exception));
1376     CYThrow(context, exception);
1377
1378     return value;
1379 }
1380
1381 JSValueRef CYPoolError::CastJSValue(JSContextRef context) const {
1382     return CYCastJSError(context, message_);
1383 }
1384
1385 CYJSError::CYJSError(JSContextRef context, const char *format, ...) {
1386     _assert(context != NULL);
1387
1388     CYPool pool;
1389
1390     va_list args;
1391     va_start(args, format);
1392     const char *message(apr_pvsprintf(pool, format, args));
1393     va_end(args);
1394
1395     value_ = CYCastJSError(context, message);
1396 }
1397
1398 JSGlobalContextRef CYGetJSContext(JSContextRef context) {
1399     return reinterpret_cast<Context *>(JSObjectGetPrivate(CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s))))->context_;
1400 }
1401
1402 extern "C" void CYSetupContext(JSGlobalContextRef context) {
1403     CYInitializeDynamic();
1404
1405     JSObjectRef global(CYGetGlobalObject(context));
1406
1407     JSObjectRef cy(JSObjectMake(context, Context_, new Context(context)));
1408     CYSetProperty(context, global, cy_s, cy, kJSPropertyAttributeDontEnum);
1409
1410 /* Cache Globals {{{ */
1411     JSObjectRef Array(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Array"))));
1412     CYSetProperty(context, cy, CYJSString("Array"), Array);
1413
1414     JSObjectRef Array_prototype(CYCastJSObject(context, CYGetProperty(context, Array, prototype_s)));
1415     CYSetProperty(context, cy, CYJSString("Array_prototype"), Array_prototype);
1416
1417     JSObjectRef Error(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Error"))));
1418     CYSetProperty(context, cy, CYJSString("Error"), Error);
1419
1420     JSObjectRef Function(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Function"))));
1421     CYSetProperty(context, cy, CYJSString("Function"), Function);
1422
1423     JSObjectRef Function_prototype(CYCastJSObject(context, CYGetProperty(context, Function, prototype_s)));
1424     CYSetProperty(context, cy, CYJSString("Function_prototype"), Function_prototype);
1425
1426     JSObjectRef Object(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Object"))));
1427     CYSetProperty(context, cy, CYJSString("Object"), Object);
1428
1429     JSObjectRef Object_prototype(CYCastJSObject(context, CYGetProperty(context, Object, prototype_s)));
1430     CYSetProperty(context, cy, CYJSString("Object_prototype"), Object_prototype);
1431
1432     JSObjectRef String(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("String"))));
1433     CYSetProperty(context, cy, CYJSString("String"), String);
1434 /* }}} */
1435
1436     CYSetProperty(context, Array_prototype, toCYON_s, &Array_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1437
1438     JSObjectRef cycript(JSObjectMake(context, NULL, NULL));
1439     CYSetProperty(context, global, CYJSString("Cycript"), cycript);
1440     CYSetProperty(context, cycript, CYJSString("gc"), &Cycript_gc_callAsFunction);
1441
1442     JSObjectRef Functor(JSObjectMakeConstructor(context, Functor_, &Functor_new));
1443     JSObjectSetPrototype(context, CYCastJSObject(context, CYGetProperty(context, Functor, prototype_s)), Function_prototype);
1444     CYSetProperty(context, cycript, CYJSString("Functor"), Functor);
1445
1446     CYSetProperty(context, cycript, CYJSString("Pointer"), JSObjectMakeConstructor(context, Pointer_, &Pointer_new));
1447     CYSetProperty(context, cycript, CYJSString("Type"), JSObjectMakeConstructor(context, Type_privateData::Class_, &Type_new));
1448
1449     JSObjectRef all(JSObjectMake(context, All_, NULL));
1450     CYSetProperty(context, cycript, CYJSString("all"), all);
1451
1452     JSObjectRef last(NULL), curr(global);
1453
1454     goto next; for (JSValueRef next;;) {
1455         if (JSValueIsNull(context, next))
1456             break;
1457         last = curr;
1458         curr = CYCastJSObject(context, next);
1459       next:
1460         next = JSObjectGetPrototype(context, curr);
1461     }
1462
1463     JSObjectSetPrototype(context, last, all);
1464
1465     CYSetProperty(context, global, CYJSString("$cyq"), &$cyq);
1466
1467     JSObjectRef System(JSObjectMake(context, NULL, NULL));
1468     CYSetProperty(context, cy, CYJSString("System"), Function);
1469
1470     CYSetProperty(context, global, CYJSString("system"), System);
1471     CYSetProperty(context, System, CYJSString("args"), CYJSNull(context));
1472     //CYSetProperty(context, System, CYJSString("global"), global);
1473     CYSetProperty(context, System, CYJSString("print"), &System_print);
1474
1475     if (hooks_ != NULL && hooks_->SetupContext != NULL)
1476         (*hooks_->SetupContext)(context);
1477 }
1478
1479 JSGlobalContextRef CYGetJSContext() {
1480     CYInitializeDynamic();
1481
1482     static JSGlobalContextRef context_;
1483
1484     if (context_ == NULL) {
1485         context_ = JSGlobalContextCreate(Global_);
1486         CYSetupContext(context_);
1487     }
1488
1489     return context_;
1490 }