Library.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 #ifdef __OBJC__
  72 #define CYCatch_ \
  73     catch (NSException *error) { \
  74         CYThrow(context, error, exception); \
  75         return NULL; \
  76     }
  77 #else
  78 #define CYCatch_
  79 #endif
  80
  81 char *sqlite3_column_pooled(apr_pool_t *pool, sqlite3_stmt *stmt, int n) {
  82     if (const unsigned char *value = sqlite3_column_text(stmt, n))
  83         return apr_pstrdup(pool, (const char *) value);
  84     else return NULL;
  85 }
  86
  87 struct CYHooks *hooks_;
  88
  89 /* JavaScript Properties {{{ */
  90 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, size_t index) {
  91     JSValueRef exception(NULL);
  92     JSValueRef value(JSObjectGetPropertyAtIndex(context, object, index, &exception));
  93     CYThrow(context, exception);
  94     return value;
  95 }
  96
  97 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, JSStringRef name) {
  98     JSValueRef exception(NULL);
  99     JSValueRef value(JSObjectGetProperty(context, object, name, &exception));
 100     CYThrow(context, exception);
 101     return value;
 102 }
 103
 104 void CYSetProperty(JSContextRef context, JSObjectRef object, size_t index, JSValueRef value) {
 105     JSValueRef exception(NULL);
 106     JSObjectSetPropertyAtIndex(context, object, index, value, &exception);
 107     CYThrow(context, exception);
 108 }
 109
 110 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef value, JSPropertyAttributes attributes) {
 111     JSValueRef exception(NULL);
 112     JSObjectSetProperty(context, object, name, value, attributes, &exception);
 113     CYThrow(context, exception);
 114 }
 115
 116 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef (*callback)(JSContextRef, JSObjectRef, JSObjectRef, size_t, const JSValueRef[], JSValueRef *), JSPropertyAttributes attributes = kJSPropertyAttributeNone) {
 117     CYSetProperty(context, object, name, JSObjectMakeFunctionWithCallback(context, name, callback), attributes);
 118 }
 119 /* }}} */
 120 /* JavaScript Strings {{{ */
 121 JSStringRef CYCopyJSString(const char *value) {
 122     return value == NULL ? NULL : JSStringCreateWithUTF8CString(value);
 123 }
 124
 125 JSStringRef CYCopyJSString(JSStringRef value) {
 126     return value == NULL ? NULL : JSStringRetain(value);
 127 }
 128
 129 JSStringRef CYCopyJSString(CYUTF8String value) {
 130     // XXX: this is very wrong
 131     return CYCopyJSString(value.data);
 132 }
 133
 134 JSStringRef CYCopyJSString(JSContextRef context, JSValueRef value) {
 135     if (JSValueIsNull(context, value))
 136         return NULL;
 137     JSValueRef exception(NULL);
 138     JSStringRef string(JSValueToStringCopy(context, value, &exception));
 139     CYThrow(context, exception);
 140     return string;
 141 }
 142
 143 static CYUTF16String CYCastUTF16String(JSStringRef value) {
 144     return CYUTF16String(JSStringGetCharactersPtr(value), JSStringGetLength(value));
 145 }
 146
 147 template <typename Type_>
 148 _finline size_t iconv_(size_t (*iconv)(iconv_t, Type_, size_t *, char **, size_t *), iconv_t cd, char **inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft) {
 149     return iconv(cd, const_cast<Type_>(inbuf), inbytesleft, outbuf, outbytesleft);
 150 }
 151
 152 CYUTF8String CYPoolUTF8String(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 153     _assert(pool != NULL);
 154
 155     CYUTF16String utf16(CYCastUTF16String(value));
 156     const char *in(reinterpret_cast<const char *>(utf16.data));
 157
 158 #ifdef __GLIBC__
 159     iconv_t conversion(_syscall(iconv_open("UTF-8", "UCS-2")));
 160 #else
 161     iconv_t conversion(_syscall(iconv_open("UTF-8", "UCS-2-INTERNAL")));
 162 #endif
 163
 164     size_t size(JSStringGetMaximumUTF8CStringSize(value));
 165     char *out(new(pool) char[size]);
 166     CYUTF8String utf8(out, size);
 167
 168     size = utf16.size * 2;
 169     _syscall(iconv_(&iconv, conversion, const_cast<char **>(&in), &size, &out, &utf8.size));
 170
 171     *out = '\0';
 172     utf8.size = out - utf8.data;
 173
 174     _syscall(iconv_close(conversion));
 175
 176     return utf8;
 177 }
 178
 179 const char *CYPoolCString(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 180     CYUTF8String utf8(CYPoolUTF8String(pool, context, value));
 181     _assert(memchr(utf8.data, '\0', utf8.size) == NULL);
 182     return utf8.data;
 183 }
 184
 185 const char *CYPoolCString(apr_pool_t *pool, JSContextRef context, JSValueRef value) {
 186     return JSValueIsNull(context, value) ? NULL : CYPoolCString(pool, context, CYJSString(context, value));
 187 }
 188 /* }}} */
 189
 190 /* Index Offsets {{{ */
 191 size_t CYGetIndex(const CYUTF8String &value) {
 192     if (value.data[0] != '0') {
 193         size_t index(0);
 194         for (size_t i(0); i != value.size; ++i) {
 195             if (!DigitRange_[value.data[i]])
 196                 return _not(size_t);
 197             index *= 10;
 198             index += value.data[i] - '0';
 199         }
 200         return index;
 201     } else if (value.size == 1)
 202         return 0;
 203     else
 204         return _not(size_t);
 205 }
 206
 207 size_t CYGetIndex(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 208     return CYGetIndex(CYPoolUTF8String(pool, context, value));
 209 }
 210
 211 // XXX: this isn't actually right
 212 bool CYGetOffset(const char *value, ssize_t &index) {
 213     if (value[0] != '0') {
 214         char *end;
 215         index = strtol(value, &end, 10);
 216         if (value + strlen(value) == end)
 217             return true;
 218     } else if (value[1] == '\0') {
 219         index = 0;
 220         return true;
 221     }
 222
 223     return false;
 224 }
 225 /* }}} */
 226
 227 /* JavaScript *ify {{{ */
 228 void CYStringify(std::ostringstream &str, const char *data, size_t size) {
 229     unsigned quot(0), apos(0);
 230     for (const char *value(data), *end(data + size); value != end; ++value)
 231         if (*value == '"')
 232             ++quot;
 233         else if (*value == '\'')
 234             ++apos;
 235
 236     bool single(quot > apos);
 237
 238     str << (single ? '\'' : '"');
 239
 240     for (const char *value(data), *end(data + size); value != end; ++value)
 241         switch (*value) {
 242             case '\\': str << "\\\\"; break;
 243             case '\b': str << "\\b"; break;
 244             case '\f': str << "\\f"; break;
 245             case '\n': str << "\\n"; break;
 246             case '\r': str << "\\r"; break;
 247             case '\t': str << "\\t"; break;
 248             case '\v': str << "\\v"; break;
 249
 250             case '"':
 251                 if (!single)
 252                     str << "\\\"";
 253                 else goto simple;
 254             break;
 255
 256             case '\'':
 257                 if (single)
 258                     str << "\\'";
 259                 else goto simple;
 260             break;
 261
 262             default:
 263                 // this test is designed to be "awewsome", generating neither warnings nor incorrect results
 264                 if (*value < 0x20 || *value >= 0x7f)
 265                     str << "\\x" << std::setbase(16) << std::setw(2) << std::setfill('0') << unsigned(uint8_t(*value));
 266                 else simple:
 267                     str << *value;
 268         }
 269
 270     str << (single ? '\'' : '"');
 271 }
 272
 273 void CYNumerify(std::ostringstream &str, double value) {
 274     char string[32];
 275     // XXX: I want this to print 1e3 rather than 1000
 276     sprintf(string, "%.17g", value);
 277     str << string;
 278 }
 279
 280 bool CYIsKey(CYUTF8String value) {
 281     const char *data(value.data);
 282     size_t size(value.size);
 283
 284     if (size == 0)
 285         return false;
 286
 287     if (DigitRange_[data[0]]) {
 288         size_t index(CYGetIndex(value));
 289         if (index == _not(size_t))
 290             return false;
 291     } else {
 292         if (!WordStartRange_[data[0]])
 293             return false;
 294         for (size_t i(1); i != size; ++i)
 295             if (!WordEndRange_[data[i]])
 296                 return false;
 297     }
 298
 299     return true;
 300 }
 301 /* }}} */
 302
 303 static JSGlobalContextRef Context_;
 304 static JSObjectRef System_;
 305
 306 static JSClassRef Functor_;
 307 static JSClassRef Global_;
 308 static JSClassRef Pointer_;
 309 static JSClassRef Runtime_;
 310 static JSClassRef Struct_;
 311
 312 JSObjectRef Array_;
 313 JSObjectRef Error_;
 314 JSObjectRef Function_;
 315 JSObjectRef String_;
 316
 317 JSObjectRef Array_prototype_;
 318 JSObjectRef Function_prototype_;
 319 JSObjectRef Object_prototype_;
 320
 321 JSStringRef length_s;
 322 JSStringRef message_s;
 323 JSStringRef name_s;
 324 JSStringRef pop_s;
 325 JSStringRef prototype_s;
 326 JSStringRef push_s;
 327 JSStringRef splice_s;
 328 JSStringRef toCYON_s;
 329 JSStringRef toJSON_s;
 330
 331 static JSStringRef Result_;
 332
 333 sqlite3 *Bridge_;
 334
 335 void CYFinalize(JSObjectRef object) {
 336     delete reinterpret_cast<CYData *>(JSObjectGetPrivate(object));
 337 }
 338
 339 struct CStringMapLess :
 340     std::binary_function<const char *, const char *, bool>
 341 {
 342     _finline bool operator ()(const char *lhs, const char *rhs) const {
 343         return strcmp(lhs, rhs) < 0;
 344     }
 345 };
 346
 347 void Structor_(apr_pool_t *pool, sig::Type *&type) {
 348     if (
 349         type->primitive == sig::pointer_P &&
 350         type->data.data.type != NULL &&
 351         type->data.data.type->primitive == sig::struct_P &&
 352         strcmp(type->data.data.type->name, "_objc_class") == 0
 353     ) {
 354         type->primitive = sig::typename_P;
 355         type->data.data.type = NULL;
 356         return;
 357     }
 358
 359     if (type->primitive != sig::struct_P || type->name == NULL)
 360         return;
 361
 362     sqlite3_stmt *statement;
 363
 364     _sqlcall(sqlite3_prepare(Bridge_,
 365         "select "
 366             "\"bridge\".\"mode\", "
 367             "\"bridge\".\"value\" "
 368         "from \"bridge\" "
 369         "where"
 370             " \"bridge\".\"mode\" in (3, 4) and"
 371             " \"bridge\".\"name\" = ?"
 372         " limit 1"
 373     , -1, &statement, NULL));
 374
 375     _sqlcall(sqlite3_bind_text(statement, 1, type->name, -1, SQLITE_STATIC));
 376
 377     int mode;
 378     const char *value;
 379
 380     if (_sqlcall(sqlite3_step(statement)) == SQLITE_DONE) {
 381         mode = -1;
 382         value = NULL;
 383     } else {
 384         mode = sqlite3_column_int(statement, 0);
 385         value = sqlite3_column_pooled(pool, statement, 1);
 386     }
 387
 388     _sqlcall(sqlite3_finalize(statement));
 389
 390     switch (mode) {
 391         default:
 392             _assert(false);
 393         case -1:
 394             break;
 395
 396         case 3: {
 397             sig::Parse(pool, &type->data.signature, value, &Structor_);
 398         } break;
 399
 400         case 4: {
 401             sig::Signature signature;
 402             sig::Parse(pool, &signature, value, &Structor_);
 403             type = signature.elements[0].type;
 404         } break;
 405     }
 406 }
 407
 408 JSClassRef Type_privateData::Class_;
 409
 410 struct Pointer :
 411     CYOwned
 412 {
 413     Type_privateData *type_;
 414     size_t length_;
 415
 416     Pointer(void *value, JSContextRef context, JSObjectRef owner, size_t length, sig::Type *type) :
 417         CYOwned(value, context, owner),
 418         type_(new(pool_) Type_privateData(type)),
 419         length_(length)
 420     {
 421     }
 422 };
 423
 424 struct Struct_privateData :
 425     CYOwned
 426 {
 427     Type_privateData *type_;
 428
 429     Struct_privateData(JSContextRef context, JSObjectRef owner) :
 430         CYOwned(NULL, context, owner)
 431     {
 432     }
 433 };
 434
 435 typedef std::map<const char *, Type_privateData *, CStringMapLess> TypeMap;
 436 static TypeMap Types_;
 437
 438 JSObjectRef CYMakeStruct(JSContextRef context, void *data, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 439     Struct_privateData *internal(new Struct_privateData(context, owner));
 440     apr_pool_t *pool(internal->pool_);
 441     Type_privateData *typical(new(pool) Type_privateData(type, ffi));
 442     internal->type_ = typical;
 443
 444     if (owner != NULL)
 445         internal->value_ = data;
 446     else {
 447         size_t size(typical->GetFFI()->size);
 448         void *copy(apr_palloc(internal->pool_, size));
 449         memcpy(copy, data, size);
 450         internal->value_ = copy;
 451     }
 452
 453     return JSObjectMake(context, Struct_, internal);
 454 }
 455
 456 JSValueRef CYCastJSValue(JSContextRef context, bool value) {
 457     return JSValueMakeBoolean(context, value);
 458 }
 459
 460 JSValueRef CYCastJSValue(JSContextRef context, double value) {
 461     return JSValueMakeNumber(context, value);
 462 }
 463
 464 #define CYCastJSValue_(Type_) \
 465     JSValueRef CYCastJSValue(JSContextRef context, Type_ value) { \
 466         return JSValueMakeNumber(context, static_cast<double>(value)); \
 467     }
 468
 469 CYCastJSValue_(int)
 470 CYCastJSValue_(unsigned int)
 471 CYCastJSValue_(long int)
 472 CYCastJSValue_(long unsigned int)
 473 CYCastJSValue_(long long int)
 474 CYCastJSValue_(long long unsigned int)
 475
 476 JSValueRef CYJSUndefined(JSContextRef context) {
 477     return JSValueMakeUndefined(context);
 478 }
 479
 480 double CYCastDouble(const char *value, size_t size) {
 481     char *end;
 482     double number(strtod(value, &end));
 483     if (end != value + size)
 484         return NAN;
 485     return number;
 486 }
 487
 488 double CYCastDouble(const char *value) {
 489     return CYCastDouble(value, strlen(value));
 490 }
 491
 492 double CYCastDouble(JSContextRef context, JSValueRef value) {
 493     JSValueRef exception(NULL);
 494     double number(JSValueToNumber(context, value, &exception));
 495     CYThrow(context, exception);
 496     return number;
 497 }
 498
 499 bool CYCastBool(JSContextRef context, JSValueRef value) {
 500     return JSValueToBoolean(context, value);
 501 }
 502
 503 JSValueRef CYJSNull(JSContextRef context) {
 504     return JSValueMakeNull(context);
 505 }
 506
 507 JSValueRef CYCastJSValue(JSContextRef context, JSStringRef value) {
 508     return value == NULL ? CYJSNull(context) : JSValueMakeString(context, value);
 509 }
 510
 511 JSValueRef CYCastJSValue(JSContextRef context, const char *value) {
 512     return CYCastJSValue(context, CYJSString(value));
 513 }
 514
 515 JSObjectRef CYCastJSObject(JSContextRef context, JSValueRef value) {
 516     JSValueRef exception(NULL);
 517     JSObjectRef object(JSValueToObject(context, value, &exception));
 518     CYThrow(context, exception);
 519     return object;
 520 }
 521
 522 JSValueRef CYCallAsFunction(JSContextRef context, JSObjectRef function, JSObjectRef _this, size_t count, JSValueRef arguments[]) {
 523     JSValueRef exception(NULL);
 524     JSValueRef value(JSObjectCallAsFunction(context, function, _this, count, arguments, &exception));
 525     CYThrow(context, exception);
 526     return value;
 527 }
 528
 529 bool CYIsCallable(JSContextRef context, JSValueRef value) {
 530     return value != NULL && JSValueIsObject(context, value) && JSObjectIsFunction(context, (JSObjectRef) value);
 531 }
 532
 533 static JSValueRef System_print(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 534     if (count == 0)
 535         printf("\n");
 536     else {
 537         CYPool pool;
 538         printf("%s\n", CYPoolCString(pool, context, arguments[0]));
 539     }
 540
 541     return CYJSUndefined(context);
 542 } CYCatch }
 543
 544 static size_t Nonce_(0);
 545
 546 static JSValueRef $cyq(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 547     CYPool pool;
 548     const char *name(apr_psprintf(pool, "%s%"APR_SIZE_T_FMT"", CYPoolCString(pool, context, arguments[0]), Nonce_++));
 549     return CYCastJSValue(context, name);
 550 }
 551
 552 static JSValueRef Cycript_gc_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 553     JSGarbageCollect(context);
 554     return CYJSUndefined(context);
 555 }
 556
 557 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSValueRef value, JSValueRef *exception) { CYTry {
 558     switch (JSType type = JSValueGetType(context, value)) {
 559         case kJSTypeUndefined:
 560             return "undefined";
 561         case kJSTypeNull:
 562             return "null";
 563         case kJSTypeBoolean:
 564             return CYCastBool(context, value) ? "true" : "false";
 565
 566         case kJSTypeNumber: {
 567             std::ostringstream str;
 568             CYNumerify(str, CYCastDouble(context, value));
 569             std::string value(str.str());
 570             return apr_pstrmemdup(pool, value.c_str(), value.size());
 571         } break;
 572
 573         case kJSTypeString: {
 574             std::ostringstream str;
 575             CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, value)));
 576             CYStringify(str, string.data, string.size);
 577             std::string value(str.str());
 578             return apr_pstrmemdup(pool, value.c_str(), value.size());
 579         } break;
 580
 581         case kJSTypeObject:
 582             return CYPoolCCYON(pool, context, (JSObjectRef) value);
 583         default:
 584             throw CYJSError(context, "JSValueGetType() == 0x%x", type);
 585     }
 586 } CYCatch }
 587
 588 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSValueRef value) {
 589     JSValueRef exception(NULL);
 590     const char *cyon(CYPoolCCYON(pool, context, value, &exception));
 591     CYThrow(context, exception);
 592     return cyon;
 593 }
 594
 595 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSObjectRef object) {
 596     JSValueRef toCYON(CYGetProperty(context, object, toCYON_s));
 597     if (CYIsCallable(context, toCYON)) {
 598         JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toCYON, object, 0, NULL));
 599         return CYPoolCString(pool, context, value);
 600     }
 601
 602     JSValueRef toJSON(CYGetProperty(context, object, toJSON_s));
 603     if (CYIsCallable(context, toJSON)) {
 604         JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 605         JSValueRef exception(NULL);
 606         const char *cyon(CYPoolCCYON(pool, context, CYCallAsFunction(context, (JSObjectRef) toJSON, object, 1, arguments), &exception));
 607         CYThrow(context, exception);
 608         return cyon;
 609     }
 610
 611     std::ostringstream str;
 612
 613     str << '{';
 614
 615     // XXX: this is, sadly, going to leak
 616     JSPropertyNameArrayRef names(JSObjectCopyPropertyNames(context, object));
 617
 618     bool comma(false);
 619
 620     for (size_t index(0), count(JSPropertyNameArrayGetCount(names)); index != count; ++index) {
 621         JSStringRef name(JSPropertyNameArrayGetNameAtIndex(names, index));
 622         JSValueRef value(CYGetProperty(context, object, name));
 623
 624         if (comma)
 625             str << ',';
 626         else
 627             comma = true;
 628
 629         CYUTF8String string(CYPoolUTF8String(pool, context, name));
 630         if (CYIsKey(string))
 631             str << string.data;
 632         else
 633             CYStringify(str, string.data, string.size);
 634
 635         str << ':' << CYPoolCCYON(pool, context, value);
 636     }
 637
 638     str << '}';
 639
 640     JSPropertyNameArrayRelease(names);
 641
 642     std::string string(str.str());
 643     return apr_pstrmemdup(pool, string.c_str(), string.size());
 644 }
 645
 646 static JSValueRef Array_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 647     CYPool pool;
 648     std::ostringstream str;
 649
 650     str << '[';
 651
 652     JSValueRef length(CYGetProperty(context, _this, length_s));
 653     bool comma(false);
 654
 655     for (size_t index(0), count(CYCastDouble(context, length)); index != count; ++index) {
 656         JSValueRef value(CYGetProperty(context, _this, index));
 657
 658         if (comma)
 659             str << ',';
 660         else
 661             comma = true;
 662
 663         if (!JSValueIsUndefined(context, value))
 664             str << CYPoolCCYON(pool, context, value);
 665         else {
 666             str << ',';
 667             comma = false;
 668         }
 669     }
 670
 671     str << ']';
 672
 673     std::string value(str.str());
 674     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 675 } CYCatch }
 676
 677 JSObjectRef CYMakePointer(JSContextRef context, void *pointer, size_t length, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 678     Pointer *internal(new Pointer(pointer, context, owner, length, type));
 679     return JSObjectMake(context, Pointer_, internal);
 680 }
 681
 682 static JSObjectRef CYMakeFunctor(JSContextRef context, void (*function)(), const char *type) {
 683     cy::Functor *internal(new cy::Functor(type, function));
 684     return JSObjectMake(context, Functor_, internal);
 685 }
 686
 687 static bool CYGetOffset(apr_pool_t *pool, JSContextRef context, JSStringRef value, ssize_t &index) {
 688     return CYGetOffset(CYPoolCString(pool, context, value), index);
 689 }
 690
 691 void *CYCastPointer_(JSContextRef context, JSValueRef value) {
 692     switch (JSValueGetType(context, value)) {
 693         case kJSTypeNull:
 694             return NULL;
 695         /*case kJSTypeObject:
 696             if (JSValueIsObjectOfClass(context, value, Pointer_)) {
 697                 Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate((JSObjectRef) value)));
 698                 return internal->value_;
 699             }*/
 700         default:
 701             double number(CYCastDouble(context, value));
 702             if (std::isnan(number))
 703                 throw CYJSError(context, "cannot convert value to pointer");
 704             return reinterpret_cast<void *>(static_cast<uintptr_t>(static_cast<long long>(number)));
 705     }
 706 }
 707
 708 void CYPoolFFI(apr_pool_t *pool, JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, JSValueRef value) {
 709     switch (type->primitive) {
 710         case sig::boolean_P:
 711             *reinterpret_cast<bool *>(data) = JSValueToBoolean(context, value);
 712         break;
 713
 714 #define CYPoolFFI_(primitive, native) \
 715         case sig::primitive ## _P: \
 716             *reinterpret_cast<native *>(data) = CYCastDouble(context, value); \
 717         break;
 718
 719         CYPoolFFI_(uchar, unsigned char)
 720         CYPoolFFI_(char, char)
 721         CYPoolFFI_(ushort, unsigned short)
 722         CYPoolFFI_(short, short)
 723         CYPoolFFI_(ulong, unsigned long)
 724         CYPoolFFI_(long, long)
 725         CYPoolFFI_(uint, unsigned int)
 726         CYPoolFFI_(int, int)
 727         CYPoolFFI_(ulonglong, unsigned long long)
 728         CYPoolFFI_(longlong, long long)
 729         CYPoolFFI_(float, float)
 730         CYPoolFFI_(double, double)
 731
 732         case sig::array_P: {
 733             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 734             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 735             for (size_t index(0); index != type->data.data.size; ++index) {
 736                 ffi_type *field(ffi->elements[index]);
 737
 738                 JSValueRef rhs;
 739                 if (aggregate == NULL)
 740                     rhs = value;
 741                 else {
 742                     rhs = CYGetProperty(context, aggregate, index);
 743                     if (JSValueIsUndefined(context, rhs))
 744                         throw CYJSError(context, "unable to extract array value");
 745                 }
 746
 747                 CYPoolFFI(pool, context, type->data.data.type, field, base, rhs);
 748                 // XXX: alignment?
 749                 base += field->size;
 750             }
 751         } break;
 752
 753         case sig::pointer_P:
 754             *reinterpret_cast<void **>(data) = CYCastPointer<void *>(context, value);
 755         break;
 756
 757         case sig::string_P:
 758             *reinterpret_cast<const char **>(data) = CYPoolCString(pool, context, value);
 759         break;
 760
 761         case sig::struct_P: {
 762             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 763             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 764             for (size_t index(0); index != type->data.signature.count; ++index) {
 765                 sig::Element *element(&type->data.signature.elements[index]);
 766                 ffi_type *field(ffi->elements[index]);
 767
 768                 JSValueRef rhs;
 769                 if (aggregate == NULL)
 770                     rhs = value;
 771                 else {
 772                     rhs = CYGetProperty(context, aggregate, index);
 773                     if (JSValueIsUndefined(context, rhs)) {
 774                         if (element->name != NULL)
 775                             rhs = CYGetProperty(context, aggregate, CYJSString(element->name));
 776                         else
 777                             goto undefined;
 778                         if (JSValueIsUndefined(context, rhs)) undefined:
 779                             throw CYJSError(context, "unable to extract structure value");
 780                     }
 781                 }
 782
 783                 CYPoolFFI(pool, context, element->type, field, base, rhs);
 784                 // XXX: alignment?
 785                 base += field->size;
 786             }
 787         } break;
 788
 789         case sig::void_P:
 790         break;
 791
 792         default:
 793             if (hooks_ != NULL && hooks_->PoolFFI != NULL)
 794                 if ((*hooks_->PoolFFI)(pool, context, type, ffi, data, value))
 795                     return;
 796
 797             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 798     }
 799 }
 800
 801 JSValueRef CYFromFFI(JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, bool initialize, JSObjectRef owner) {
 802     switch (type->primitive) {
 803         case sig::boolean_P:
 804             return CYCastJSValue(context, *reinterpret_cast<bool *>(data));
 805
 806 #define CYFromFFI_(primitive, native) \
 807         case sig::primitive ## _P: \
 808             return CYCastJSValue(context, *reinterpret_cast<native *>(data)); \
 809
 810         CYFromFFI_(uchar, unsigned char)
 811         CYFromFFI_(char, char)
 812         CYFromFFI_(ushort, unsigned short)
 813         CYFromFFI_(short, short)
 814         CYFromFFI_(ulong, unsigned long)
 815         CYFromFFI_(long, long)
 816         CYFromFFI_(uint, unsigned int)
 817         CYFromFFI_(int, int)
 818         CYFromFFI_(ulonglong, unsigned long long)
 819         CYFromFFI_(longlong, long long)
 820         CYFromFFI_(float, float)
 821         CYFromFFI_(double, double)
 822
 823         case sig::array_P:
 824             if (void *pointer = data)
 825                 return CYMakePointer(context, pointer, type->data.data.size, type->data.data.type, NULL, owner);
 826             else goto null;
 827
 828         case sig::pointer_P:
 829             if (void *pointer = *reinterpret_cast<void **>(data))
 830                 return CYMakePointer(context, pointer, _not(size_t), type->data.data.type, NULL, owner);
 831             else goto null;
 832
 833         case sig::string_P:
 834             if (char *utf8 = *reinterpret_cast<char **>(data))
 835                 return CYCastJSValue(context, utf8);
 836             else goto null;
 837
 838         case sig::struct_P:
 839             return CYMakeStruct(context, data, type, ffi, owner);
 840         case sig::void_P:
 841             return CYJSUndefined(context);
 842
 843         null:
 844             return CYJSNull(context);
 845         default:
 846             if (hooks_ != NULL && hooks_->FromFFI != NULL)
 847                 if (JSValueRef value = (*hooks_->FromFFI)(context, type, ffi, data, initialize, owner))
 848                     return value;
 849
 850             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 851     }
 852 }
 853
 854 static void FunctionClosure_(ffi_cif *cif, void *result, void **arguments, void *arg) {
 855     Closure_privateData *internal(reinterpret_cast<Closure_privateData *>(arg));
 856
 857     JSContextRef context(internal->context_);
 858
 859     size_t count(internal->cif_.nargs);
 860     JSValueRef values[count];
 861
 862     for (size_t index(0); index != count; ++index)
 863         values[index] = CYFromFFI(context, internal->signature_.elements[1 + index].type, internal->cif_.arg_types[index], arguments[index]);
 864
 865     JSValueRef value(CYCallAsFunction(context, internal->function_, NULL, count, values));
 866     CYPoolFFI(NULL, context, internal->signature_.elements[0].type, internal->cif_.rtype, result, value);
 867 }
 868
 869 Closure_privateData *CYMakeFunctor_(JSContextRef context, JSObjectRef function, const char *type, void (*callback)(ffi_cif *, void *, void **, void *)) {
 870     // XXX: in case of exceptions this will leak
 871     // XXX: in point of fact, this may /need/ to leak :(
 872     Closure_privateData *internal(new Closure_privateData(context, function, type));
 873
 874     ffi_closure *closure((ffi_closure *) _syscall(mmap(
 875         NULL, sizeof(ffi_closure),
 876         PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE,
 877         -1, 0
 878     )));
 879
 880     ffi_status status(ffi_prep_closure(closure, &internal->cif_, callback, internal));
 881     _assert(status == FFI_OK);
 882
 883     _syscall(mprotect(closure, sizeof(*closure), PROT_READ | PROT_EXEC));
 884
 885     internal->value_ = closure;
 886
 887     return internal;
 888 }
 889
 890 static JSObjectRef CYMakeFunctor(JSContextRef context, JSObjectRef function, const char *type) {
 891     Closure_privateData *internal(CYMakeFunctor_(context, function, type, &FunctionClosure_));
 892     return JSObjectMake(context, Functor_, internal);
 893 }
 894
 895 static JSObjectRef CYMakeFunctor(JSContextRef context, JSValueRef value, const char *type) {
 896     JSValueRef exception(NULL);
 897     bool function(JSValueIsInstanceOfConstructor(context, value, Function_, &exception));
 898     CYThrow(context, exception);
 899
 900     if (function) {
 901         JSObjectRef function(CYCastJSObject(context, value));
 902         return CYMakeFunctor(context, function, type);
 903     } else {
 904         void (*function)()(CYCastPointer<void (*)()>(context, value));
 905         return CYMakeFunctor(context, function, type);
 906     }
 907 }
 908
 909 static bool Index_(apr_pool_t *pool, JSContextRef context, Struct_privateData *internal, JSStringRef property, ssize_t &index, uint8_t *&base) {
 910     Type_privateData *typical(internal->type_);
 911     sig::Type *type(typical->type_);
 912     if (type == NULL)
 913         return false;
 914
 915     const char *name(CYPoolCString(pool, context, property));
 916     size_t length(strlen(name));
 917     double number(CYCastDouble(name, length));
 918
 919     size_t count(type->data.signature.count);
 920
 921     if (std::isnan(number)) {
 922         if (property == NULL)
 923             return false;
 924
 925         sig::Element *elements(type->data.signature.elements);
 926
 927         for (size_t local(0); local != count; ++local) {
 928             sig::Element *element(&elements[local]);
 929             if (element->name != NULL && strcmp(name, element->name) == 0) {
 930                 index = local;
 931                 goto base;
 932             }
 933         }
 934
 935         return false;
 936     } else {
 937         index = static_cast<ssize_t>(number);
 938         if (index != number || index < 0 || static_cast<size_t>(index) >= count)
 939             return false;
 940     }
 941
 942   base:
 943     ffi_type **elements(typical->GetFFI()->elements);
 944
 945     base = reinterpret_cast<uint8_t *>(internal->value_);
 946     for (ssize_t local(0); local != index; ++local)
 947         base += elements[local]->size;
 948
 949     return true;
 950 }
 951
 952 static JSValueRef Pointer_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 953     CYPool pool;
 954     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 955
 956     if (JSStringIsEqual(property, length_s))
 957         return internal->length_ == _not(size_t) ? CYJSUndefined(context) : CYCastJSValue(context, internal->length_);
 958
 959     Type_privateData *typical(internal->type_);
 960
 961     if (typical->type_ == NULL)
 962         return NULL;
 963
 964     ssize_t offset;
 965     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 966         offset = 0;
 967     else if (!CYGetOffset(pool, context, property, offset))
 968         return NULL;
 969
 970     ffi_type *ffi(typical->GetFFI());
 971
 972     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 973     base += ffi->size * offset;
 974
 975     JSObjectRef owner(internal->GetOwner() ?: object);
 976     return CYFromFFI(context, typical->type_, ffi, base, false, owner);
 977 } CYCatch }
 978
 979 static bool Pointer_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 980     CYPool pool;
 981     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 982     Type_privateData *typical(internal->type_);
 983
 984     if (typical->type_ == NULL)
 985         return NULL;
 986
 987     ssize_t offset;
 988     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 989         offset = 0;
 990     else if (!CYGetOffset(pool, context, property, offset))
 991         return NULL;
 992
 993     ffi_type *ffi(typical->GetFFI());
 994
 995     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 996     base += ffi->size * offset;
 997
 998     CYPoolFFI(NULL, context, typical->type_, ffi, base, value);
 999     return true;
1000 } CYCatch }
1001
1002 static JSValueRef Struct_callAsFunction_$cya(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1003     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(_this)));
1004     Type_privateData *typical(internal->type_);
1005     return CYMakePointer(context, internal->value_, _not(size_t), typical->type_, typical->ffi_, _this);
1006 }
1007
1008 static JSValueRef Struct_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1009     CYPool pool;
1010     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
1011     Type_privateData *typical(internal->type_);
1012
1013     ssize_t index;
1014     uint8_t *base;
1015
1016     if (!Index_(pool, context, internal, property, index, base))
1017         return NULL;
1018
1019     JSObjectRef owner(internal->GetOwner() ?: object);
1020
1021     return CYFromFFI(context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, false, owner);
1022 } CYCatch }
1023
1024 static bool Struct_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
1025     CYPool pool;
1026     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
1027     Type_privateData *typical(internal->type_);
1028
1029     ssize_t index;
1030     uint8_t *base;
1031
1032     if (!Index_(pool, context, internal, property, index, base))
1033         return false;
1034
1035     CYPoolFFI(NULL, context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, value);
1036     return true;
1037 } CYCatch }
1038
1039 static void Struct_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
1040     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
1041     Type_privateData *typical(internal->type_);
1042     sig::Type *type(typical->type_);
1043
1044     if (type == NULL)
1045         return;
1046
1047     size_t count(type->data.signature.count);
1048     sig::Element *elements(type->data.signature.elements);
1049
1050     char number[32];
1051
1052     for (size_t index(0); index != count; ++index) {
1053         const char *name;
1054         name = elements[index].name;
1055
1056         if (name == NULL) {
1057             sprintf(number, "%zu", index);
1058             name = number;
1059         }
1060
1061         JSPropertyNameAccumulatorAddName(names, CYJSString(name));
1062     }
1063 }
1064
1065 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 {
1066     if (setups + count != signature->count - 1)
1067         throw CYJSError(context, "incorrect number of arguments to ffi function");
1068
1069     size_t size(setups + count);
1070     void *values[size];
1071     memcpy(values, setup, sizeof(void *) * setups);
1072
1073     for (size_t index(setups); index != size; ++index) {
1074         sig::Element *element(&signature->elements[index + 1]);
1075         ffi_type *ffi(cif->arg_types[index]);
1076         // XXX: alignment?
1077         values[index] = new(pool) uint8_t[ffi->size];
1078         CYPoolFFI(pool, context, element->type, ffi, values[index], arguments[index - setups]);
1079     }
1080
1081     uint8_t value[cif->rtype->size];
1082
1083     if (hooks_ != NULL && hooks_->CallFunction != NULL)
1084         (*hooks_->CallFunction)(context, cif, function, value, values);
1085     else
1086         ffi_call(cif, function, value, values);
1087
1088     return CYFromFFI(context, signature->elements[0].type, cif->rtype, value, initialize);
1089 } CYCatch }
1090
1091 static JSValueRef Functor_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1092     CYPool pool;
1093     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
1094     return CYCallFunction(pool, context, 0, NULL, count, arguments, false, exception, &internal->signature_, &internal->cif_, internal->GetValue());
1095 }
1096
1097 static JSObjectRef CYMakeType(JSContextRef context, const char *type) {
1098     Type_privateData *internal(new Type_privateData(type));
1099     return JSObjectMake(context, Type_privateData::Class_, internal);
1100 }
1101
1102 static JSObjectRef CYMakeType(JSContextRef context, sig::Type *type) {
1103     Type_privateData *internal(new Type_privateData(type));
1104     return JSObjectMake(context, Type_privateData::Class_, internal);
1105 }
1106
1107 static void *CYCastSymbol(const char *name) {
1108     return dlsym(RTLD_DEFAULT, name);
1109 }
1110
1111 static JSValueRef Runtime_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1112     CYPool pool;
1113     CYUTF8String name(CYPoolUTF8String(pool, context, property));
1114
1115     if (hooks_ != NULL && hooks_->RuntimeProperty != NULL)
1116         if (JSValueRef value = (*hooks_->RuntimeProperty)(context, name))
1117             return value;
1118
1119     sqlite3_stmt *statement;
1120
1121     _sqlcall(sqlite3_prepare(Bridge_,
1122         "select "
1123             "\"bridge\".\"mode\", "
1124             "\"bridge\".\"value\" "
1125         "from \"bridge\" "
1126         "where"
1127             " \"bridge\".\"name\" = ?"
1128         " limit 1"
1129     , -1, &statement, NULL));
1130
1131     _sqlcall(sqlite3_bind_text(statement, 1, name.data, name.size, SQLITE_STATIC));
1132
1133     int mode;
1134     const char *value;
1135
1136     if (_sqlcall(sqlite3_step(statement)) == SQLITE_DONE) {
1137         mode = -1;
1138         value = NULL;
1139     } else {
1140         mode = sqlite3_column_int(statement, 0);
1141         value = sqlite3_column_pooled(pool, statement, 1);
1142     }
1143
1144     _sqlcall(sqlite3_finalize(statement));
1145
1146     switch (mode) {
1147         default:
1148             _assert(false);
1149         case -1:
1150             return NULL;
1151
1152         case 0:
1153             return JSEvaluateScript(CYGetJSContext(context), CYJSString(value), NULL, NULL, 0, NULL);
1154
1155         case 1:
1156             if (void (*symbol)() = reinterpret_cast<void (*)()>(CYCastSymbol(name.data)))
1157                 return CYMakeFunctor(context, symbol, value);
1158             else return NULL;
1159
1160         case 2:
1161             if (void *symbol = CYCastSymbol(name.data)) {
1162                 // XXX: this is horrendously inefficient
1163                 sig::Signature signature;
1164                 sig::Parse(pool, &signature, value, &Structor_);
1165                 ffi_cif cif;
1166                 sig::sig_ffi_cif(pool, &sig::ObjectiveC, &signature, &cif);
1167                 return CYFromFFI(context, signature.elements[0].type, cif.rtype, symbol);
1168             } else return NULL;
1169
1170         // XXX: implement case 3
1171         case 4:
1172             return CYMakeType(context, value);
1173     }
1174 } CYCatch }
1175
1176 static JSObjectRef Pointer_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1177     if (count != 2)
1178         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1179
1180     CYPool pool;
1181
1182     void *value(CYCastPointer<void *>(context, arguments[0]));
1183     const char *type(CYPoolCString(pool, context, arguments[1]));
1184
1185     sig::Signature signature;
1186     sig::Parse(pool, &signature, type, &Structor_);
1187
1188     return CYMakePointer(context, value, _not(size_t), signature.elements[0].type, NULL, NULL);
1189 } CYCatch }
1190
1191 static JSObjectRef Type_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1192     if (count != 1)
1193         throw CYJSError(context, "incorrect number of arguments to Type constructor");
1194     CYPool pool;
1195     const char *type(CYPoolCString(pool, context, arguments[0]));
1196     return CYMakeType(context, type);
1197 } CYCatch }
1198
1199 static JSValueRef Type_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1200     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1201
1202     sig::Type type;
1203
1204     if (JSStringIsEqualToUTF8CString(property, "$cyi")) {
1205         type.primitive = sig::pointer_P;
1206         type.data.data.size = 0;
1207     } else {
1208         CYPool pool;
1209         size_t index(CYGetIndex(pool, context, property));
1210         if (index == _not(size_t))
1211             return NULL;
1212         type.primitive = sig::array_P;
1213         type.data.data.size = index;
1214     }
1215
1216     type.name = NULL;
1217     type.flags = 0;
1218
1219     type.data.data.type = internal->type_;
1220
1221     return CYMakeType(context, &type);
1222 } CYCatch }
1223
1224 static JSValueRef Type_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1225     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1226
1227     if (count != 1)
1228         throw CYJSError(context, "incorrect number of arguments to type cast function");
1229     sig::Type *type(internal->type_);
1230     ffi_type *ffi(internal->GetFFI());
1231     // XXX: alignment?
1232     uint8_t value[ffi->size];
1233     CYPool pool;
1234     CYPoolFFI(pool, context, type, ffi, value, arguments[0]);
1235     return CYFromFFI(context, type, ffi, value);
1236 } CYCatch }
1237
1238 static JSObjectRef Type_callAsConstructor(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1239     if (count != 0)
1240         throw CYJSError(context, "incorrect number of arguments to type cast function");
1241     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1242
1243     sig::Type *type(internal->type_);
1244     size_t length;
1245
1246     if (type->primitive != sig::array_P)
1247         length = _not(size_t);
1248     else {
1249         length = type->data.data.size;
1250         type = type->data.data.type;
1251     }
1252
1253     void *value(malloc(internal->GetFFI()->size));
1254     return CYMakePointer(context, value, length, type, NULL, NULL);
1255 } CYCatch }
1256
1257 static JSObjectRef Functor_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1258     if (count != 2)
1259         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1260     CYPool pool;
1261     const char *type(CYPoolCString(pool, context, arguments[1]));
1262     return CYMakeFunctor(context, arguments[0], type);
1263 } CYCatch }
1264
1265 static JSValueRef CYValue_callAsFunction_valueOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1266     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1267     return CYCastJSValue(context, reinterpret_cast<uintptr_t>(internal->value_));
1268 } CYCatch }
1269
1270 static JSValueRef CYValue_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1271     return CYValue_callAsFunction_valueOf(context, object, _this, count, arguments, exception);
1272 }
1273
1274 static JSValueRef CYValue_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1275     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1276     char string[32];
1277     sprintf(string, "%p", internal->value_);
1278     return CYCastJSValue(context, string);
1279 } CYCatch }
1280
1281 static JSValueRef Pointer_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1282     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(_this)));
1283     if (internal->length_ != _not(size_t))
1284         // XXX: maybe dynamically look up Array.toCYON?
1285         return Array_callAsFunction_toCYON(context, object, _this, count, arguments, exception);
1286     else {
1287         char string[32];
1288         sprintf(string, "%p", internal->value_);
1289         return CYCastJSValue(context, string);
1290     }
1291 } CYCatch }
1292
1293 static JSValueRef Type_callAsFunction_toString(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1294     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1295     CYPool pool;
1296     const char *type(sig::Unparse(pool, internal->type_));
1297     return CYCastJSValue(context, CYJSString(type));
1298 } CYCatch }
1299
1300 static JSValueRef Type_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1301     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1302     CYPool pool;
1303     const char *type(sig::Unparse(pool, internal->type_));
1304     size_t size(strlen(type));
1305     char *cyon(new(pool) char[12 + size + 1]);
1306     memcpy(cyon, "new Type(\"", 10);
1307     cyon[12 + size] = '\0';
1308     cyon[12 + size - 2] = '"';
1309     cyon[12 + size - 1] = ')';
1310     memcpy(cyon + 10, type, size);
1311     return CYCastJSValue(context, CYJSString(cyon));
1312 } CYCatch }
1313
1314 static JSValueRef Type_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1315     return Type_callAsFunction_toString(context, object, _this, count, arguments, exception);
1316 }
1317
1318 static JSStaticFunction Pointer_staticFunctions[4] = {
1319     {"toCYON", &Pointer_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1320     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1321     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1322     {NULL, NULL, 0}
1323 };
1324
1325 static JSStaticFunction Struct_staticFunctions[2] = {
1326     {"$cya", &Struct_callAsFunction_$cya, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1327     {NULL, NULL, 0}
1328 };
1329
1330 static JSStaticFunction Functor_staticFunctions[4] = {
1331     {"toCYON", &CYValue_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1332     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1333     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1334     {NULL, NULL, 0}
1335 };
1336
1337 namespace cy {
1338     JSStaticFunction const * const Functor::StaticFunctions = Functor_staticFunctions;
1339 }
1340
1341 static JSStaticFunction Type_staticFunctions[4] = {
1342     {"toCYON", &Type_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1343     {"toJSON", &Type_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1344     {"toString", &Type_callAsFunction_toString, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1345     {NULL, NULL, 0}
1346 };
1347
1348 static JSObjectRef (*JSObjectMakeArray$)(JSContextRef, size_t, const JSValueRef[], JSValueRef *);
1349
1350 void CYSetArgs(int argc, const char *argv[]) {
1351     JSContextRef context(CYGetJSContext());
1352     JSValueRef args[argc];
1353     for (int i(0); i != argc; ++i)
1354         args[i] = CYCastJSValue(context, argv[i]);
1355
1356     JSObjectRef array;
1357     if (JSObjectMakeArray$ != NULL) {
1358         JSValueRef exception(NULL);
1359         array = (*JSObjectMakeArray$)(context, argc, args, &exception);
1360         CYThrow(context, exception);
1361     } else {
1362         JSValueRef value(CYCallAsFunction(context, Array_, NULL, argc, args));
1363         array = CYCastJSObject(context, value);
1364     }
1365
1366     CYSetProperty(context, System_, CYJSString("args"), array);
1367 }
1368
1369 JSObjectRef CYGetGlobalObject(JSContextRef context) {
1370     return JSContextGetGlobalObject(context);
1371 }
1372
1373 const char *CYExecute(apr_pool_t *pool, const char *code) {
1374     JSContextRef context(CYGetJSContext());
1375     JSValueRef exception(NULL), result;
1376
1377     void *handle;
1378     if (hooks_ != NULL && hooks_->ExecuteStart != NULL)
1379         handle = (*hooks_->ExecuteStart)(context);
1380     else
1381         handle = NULL;
1382
1383     const char *json;
1384
1385     try {
1386         result = JSEvaluateScript(context, CYJSString(code), NULL, NULL, 0, &exception);
1387     } catch (const char *error) {
1388         return error;
1389     }
1390
1391     if (exception != NULL) { error:
1392         result = exception;
1393         exception = NULL;
1394     }
1395
1396     if (JSValueIsUndefined(context, result))
1397         return NULL;
1398
1399     try {
1400         json = CYPoolCCYON(pool, context, result, &exception);
1401     } catch (const char *error) {
1402         return error;
1403     }
1404
1405     if (exception != NULL)
1406         goto error;
1407
1408     CYSetProperty(context, CYGetGlobalObject(context), Result_, result);
1409
1410     if (hooks_ != NULL && hooks_->ExecuteEnd != NULL)
1411         (*hooks_->ExecuteEnd)(context, handle);
1412     return json;
1413 }
1414
1415 static apr_pool_t *Pool_;
1416
1417 static bool initialized_;
1418
1419 void CYInitialize() {
1420     if (!initialized_)
1421         initialized_ = true;
1422     else return;
1423
1424     _aprcall(apr_initialize());
1425     _aprcall(apr_pool_create(&Pool_, NULL));
1426     _sqlcall(sqlite3_open("/usr/lib/libcycript.db", &Bridge_));
1427
1428     JSObjectMakeArray$ = reinterpret_cast<JSObjectRef (*)(JSContextRef, size_t, const JSValueRef[], JSValueRef *)>(dlsym(RTLD_DEFAULT, "JSObjectMakeArray"));
1429
1430     JSClassDefinition definition;
1431
1432     definition = kJSClassDefinitionEmpty;
1433     definition.className = "Functor";
1434     definition.staticFunctions = cy::Functor::StaticFunctions;
1435     definition.callAsFunction = &Functor_callAsFunction;
1436     definition.finalize = &CYFinalize;
1437     Functor_ = JSClassCreate(&definition);
1438
1439     definition = kJSClassDefinitionEmpty;
1440     definition.className = "Pointer";
1441     definition.staticFunctions = Pointer_staticFunctions;
1442     definition.getProperty = &Pointer_getProperty;
1443     definition.setProperty = &Pointer_setProperty;
1444     definition.finalize = &CYFinalize;
1445     Pointer_ = JSClassCreate(&definition);
1446
1447     definition = kJSClassDefinitionEmpty;
1448     definition.className = "Struct";
1449     definition.staticFunctions = Struct_staticFunctions;
1450     definition.getProperty = &Struct_getProperty;
1451     definition.setProperty = &Struct_setProperty;
1452     definition.getPropertyNames = &Struct_getPropertyNames;
1453     definition.finalize = &CYFinalize;
1454     Struct_ = JSClassCreate(&definition);
1455
1456     definition = kJSClassDefinitionEmpty;
1457     definition.className = "Type";
1458     definition.staticFunctions = Type_staticFunctions;
1459     definition.getProperty = &Type_getProperty;
1460     definition.callAsFunction = &Type_callAsFunction;
1461     definition.callAsConstructor = &Type_callAsConstructor;
1462     definition.finalize = &CYFinalize;
1463     Type_privateData::Class_ = JSClassCreate(&definition);
1464
1465     definition = kJSClassDefinitionEmpty;
1466     definition.className = "Runtime";
1467     definition.getProperty = &Runtime_getProperty;
1468     Runtime_ = JSClassCreate(&definition);
1469
1470     definition = kJSClassDefinitionEmpty;
1471     //definition.getProperty = &Global_getProperty;
1472     Global_ = JSClassCreate(&definition);
1473
1474     length_s = JSStringCreateWithUTF8CString("length");
1475     message_s = JSStringCreateWithUTF8CString("message");
1476     name_s = JSStringCreateWithUTF8CString("name");
1477     pop_s = JSStringCreateWithUTF8CString("pop");
1478     prototype_s = JSStringCreateWithUTF8CString("prototype");
1479     push_s = JSStringCreateWithUTF8CString("push");
1480     splice_s = JSStringCreateWithUTF8CString("splice");
1481     toCYON_s = JSStringCreateWithUTF8CString("toCYON");
1482     toJSON_s = JSStringCreateWithUTF8CString("toJSON");
1483
1484     Result_ = JSStringCreateWithUTF8CString("_");
1485
1486     if (hooks_ != NULL && hooks_->Initialize != NULL)
1487         (*hooks_->Initialize)();
1488 }
1489
1490 apr_pool_t *CYGetGlobalPool() {
1491     CYInitialize();
1492     return Pool_;
1493 }
1494
1495 void CYThrow(JSContextRef context, JSValueRef value) {
1496     if (value != NULL)
1497         throw CYJSError(context, value);
1498 }
1499
1500 const char *CYJSError::PoolCString(apr_pool_t *pool) const {
1501     return CYPoolCString(pool, context_, value_);
1502 }
1503
1504 JSValueRef CYJSError::CastJSValue(JSContextRef context) const {
1505     // XXX: what if the context is different?
1506     return value_;
1507 }
1508
1509 void CYThrow(const char *format, ...) {
1510     va_list args;
1511     va_start (args, format);
1512     throw CYPoolError(format, args);
1513     // XXX: does this matter? :(
1514     va_end (args);
1515 }
1516
1517 const char *CYPoolError::PoolCString(apr_pool_t *pool) const {
1518     return apr_pstrdup(pool, message_);
1519 }
1520
1521 CYPoolError::CYPoolError(const char *format, ...) {
1522     va_list args;
1523     va_start (args, format);
1524     message_ = apr_pvsprintf(pool_, format, args);
1525     va_end (args);
1526 }
1527
1528 CYPoolError::CYPoolError(const char *format, va_list args) {
1529     message_ = apr_pvsprintf(pool_, format, args);
1530 }
1531
1532 JSValueRef CYCastJSError(JSContextRef context, const char *message) {
1533     JSValueRef arguments[1] = {CYCastJSValue(context, message)};
1534
1535     JSValueRef exception(NULL);
1536     JSValueRef value(JSObjectCallAsConstructor(context, Error_, 1, arguments, &exception));
1537     CYThrow(context, exception);
1538
1539     return value;
1540 }
1541
1542 JSValueRef CYPoolError::CastJSValue(JSContextRef context) const {
1543     return CYCastJSError(context, message_);
1544 }
1545
1546 CYJSError::CYJSError(JSContextRef context, const char *format, ...) {
1547     _assert(context != NULL);
1548
1549     CYPool pool;
1550
1551     va_list args;
1552     va_start (args, format);
1553     const char *message(apr_pvsprintf(pool, format, args));
1554     va_end (args);
1555
1556     value_ = CYCastJSError(context, message);
1557 }
1558
1559 JSGlobalContextRef CYGetJSContext(JSContextRef context) {
1560     // XXX: do something better
1561     return Context_;
1562 }
1563
1564 void CYSetupContext(JSGlobalContextRef context) {
1565     JSObjectRef global(CYGetGlobalObject(context));
1566
1567     Array_ = CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Array")));
1568     JSValueProtect(context, Array_);
1569     Array_prototype_ = CYCastJSObject(context, CYGetProperty(context, Array_, prototype_s));
1570     JSValueProtect(context, Array_prototype_);
1571
1572     Error_ = CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Error")));
1573     JSValueProtect(context, Error_);
1574
1575     Function_ = CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Function")));
1576     JSValueProtect(context, Function_);
1577     Function_prototype_ = (JSObjectRef) CYGetProperty(context, Function_, prototype_s);
1578     JSValueProtect(context, Function_prototype_);
1579
1580     JSObjectRef Object(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Object"))));
1581     Object_prototype_ = CYCastJSObject(context, CYGetProperty(context, Object, prototype_s));
1582     JSValueProtect(context, Object_prototype_);
1583
1584     String_ = CYCastJSObject(context, CYGetProperty(context, global, CYJSString("String")));
1585     JSValueProtect(context, String_);
1586
1587     JSObjectSetPrototype(context, global, JSObjectMake(context, Runtime_, NULL));
1588
1589     CYSetProperty(context, Array_prototype_, toCYON_s, &Array_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1590
1591     JSObjectRef Functor(JSObjectMakeConstructor(context, Functor_, &Functor_new));
1592
1593     JSObjectSetPrototype(context, (JSObjectRef) CYGetProperty(context, Functor, prototype_s), Function_prototype_);
1594
1595     CYSetProperty(context, global, CYJSString("Functor"), Functor);
1596     CYSetProperty(context, global, CYJSString("Pointer"), JSObjectMakeConstructor(context, Pointer_, &Pointer_new));
1597     CYSetProperty(context, global, CYJSString("Type"), JSObjectMakeConstructor(context, Type_privateData::Class_, &Type_new));
1598
1599     JSObjectRef cycript(JSObjectMake(context, NULL, NULL));
1600     CYSetProperty(context, global, CYJSString("Cycript"), cycript);
1601     CYSetProperty(context, cycript, CYJSString("gc"), &Cycript_gc_callAsFunction);
1602
1603     CYSetProperty(context, global, CYJSString("$cyq"), &$cyq);
1604
1605     System_ = JSObjectMake(context, NULL, NULL);
1606     JSValueProtect(context, System_);
1607
1608     CYSetProperty(context, global, CYJSString("system"), System_);
1609     CYSetProperty(context, System_, CYJSString("args"), CYJSNull(context));
1610     //CYSetProperty(context, System_, CYJSString("global"), global);
1611     CYSetProperty(context, System_, CYJSString("print"), &System_print);
1612
1613     if (hooks_ != NULL && hooks_->SetupContext != NULL)
1614         (*hooks_->SetupContext)(context);
1615 }
1616
1617 JSGlobalContextRef CYGetJSContext() {
1618     CYInitialize();
1619
1620     if (Context_ == NULL) {
1621         Context_ = JSGlobalContextCreate(Global_);
1622         CYSetupContext(Context_);
1623     }
1624
1625     return Context_;
1626 }