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; it needs to convert to UTF16 and then create from there
 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 "awesome", 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 JSClassRef Context_;
 304 static JSClassRef Functor_;
 305 static JSClassRef Global_;
 306 static JSClassRef Pointer_;
 307 static JSClassRef Runtime_;
 308 static JSClassRef Struct_;
 309
 310 JSStringRef Array_s;
 311 JSStringRef cy_s;
 312 JSStringRef length_s;
 313 JSStringRef message_s;
 314 JSStringRef name_s;
 315 JSStringRef pop_s;
 316 JSStringRef prototype_s;
 317 JSStringRef push_s;
 318 JSStringRef splice_s;
 319 JSStringRef toCYON_s;
 320 JSStringRef toJSON_s;
 321
 322 static JSStringRef Result_;
 323
 324 sqlite3 *Bridge_;
 325
 326 void CYFinalize(JSObjectRef object) {
 327     delete reinterpret_cast<CYData *>(JSObjectGetPrivate(object));
 328 }
 329
 330 struct CStringMapLess :
 331     std::binary_function<const char *, const char *, bool>
 332 {
 333     _finline bool operator ()(const char *lhs, const char *rhs) const {
 334         return strcmp(lhs, rhs) < 0;
 335     }
 336 };
 337
 338 void Structor_(apr_pool_t *pool, sig::Type *&type) {
 339     if (
 340         type->primitive == sig::pointer_P &&
 341         type->data.data.type != NULL &&
 342         type->data.data.type->primitive == sig::struct_P &&
 343         strcmp(type->data.data.type->name, "_objc_class") == 0
 344     ) {
 345         type->primitive = sig::typename_P;
 346         type->data.data.type = NULL;
 347         return;
 348     }
 349
 350     if (type->primitive != sig::struct_P || type->name == NULL)
 351         return;
 352
 353     sqlite3_stmt *statement;
 354
 355     _sqlcall(sqlite3_prepare(Bridge_,
 356         "select "
 357             "\"bridge\".\"mode\", "
 358             "\"bridge\".\"value\" "
 359         "from \"bridge\" "
 360         "where"
 361             " \"bridge\".\"mode\" in (3, 4) and"
 362             " \"bridge\".\"name\" = ?"
 363         " limit 1"
 364     , -1, &statement, NULL));
 365
 366     _sqlcall(sqlite3_bind_text(statement, 1, type->name, -1, SQLITE_STATIC));
 367
 368     int mode;
 369     const char *value;
 370
 371     if (_sqlcall(sqlite3_step(statement)) == SQLITE_DONE) {
 372         mode = -1;
 373         value = NULL;
 374     } else {
 375         mode = sqlite3_column_int(statement, 0);
 376         value = sqlite3_column_pooled(pool, statement, 1);
 377     }
 378
 379     _sqlcall(sqlite3_finalize(statement));
 380
 381     switch (mode) {
 382         default:
 383             _assert(false);
 384         case -1:
 385             break;
 386
 387         case 3: {
 388             sig::Parse(pool, &type->data.signature, value, &Structor_);
 389         } break;
 390
 391         case 4: {
 392             sig::Signature signature;
 393             sig::Parse(pool, &signature, value, &Structor_);
 394             type = signature.elements[0].type;
 395         } break;
 396     }
 397 }
 398
 399 JSClassRef Type_privateData::Class_;
 400
 401 struct Context :
 402     CYData
 403 {
 404     JSGlobalContextRef context_;
 405
 406     Context(JSGlobalContextRef context) :
 407         context_(context)
 408     {
 409     }
 410 };
 411
 412 struct Pointer :
 413     CYOwned
 414 {
 415     Type_privateData *type_;
 416     size_t length_;
 417
 418     Pointer(void *value, JSContextRef context, JSObjectRef owner, size_t length, sig::Type *type) :
 419         CYOwned(value, context, owner),
 420         type_(new(pool_) Type_privateData(type)),
 421         length_(length)
 422     {
 423     }
 424 };
 425
 426 struct Struct_privateData :
 427     CYOwned
 428 {
 429     Type_privateData *type_;
 430
 431     Struct_privateData(JSContextRef context, JSObjectRef owner) :
 432         CYOwned(NULL, context, owner)
 433     {
 434     }
 435 };
 436
 437 typedef std::map<const char *, Type_privateData *, CStringMapLess> TypeMap;
 438 static TypeMap Types_;
 439
 440 JSObjectRef CYMakeStruct(JSContextRef context, void *data, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 441     Struct_privateData *internal(new Struct_privateData(context, owner));
 442     apr_pool_t *pool(internal->pool_);
 443     Type_privateData *typical(new(pool) Type_privateData(type, ffi));
 444     internal->type_ = typical;
 445
 446     if (owner != NULL)
 447         internal->value_ = data;
 448     else {
 449         size_t size(typical->GetFFI()->size);
 450         void *copy(apr_palloc(internal->pool_, size));
 451         memcpy(copy, data, size);
 452         internal->value_ = copy;
 453     }
 454
 455     return JSObjectMake(context, Struct_, internal);
 456 }
 457
 458 JSValueRef CYCastJSValue(JSContextRef context, bool value) {
 459     return JSValueMakeBoolean(context, value);
 460 }
 461
 462 JSValueRef CYCastJSValue(JSContextRef context, double value) {
 463     return JSValueMakeNumber(context, value);
 464 }
 465
 466 #define CYCastJSValue_(Type_) \
 467     JSValueRef CYCastJSValue(JSContextRef context, Type_ value) { \
 468         return JSValueMakeNumber(context, static_cast<double>(value)); \
 469     }
 470
 471 CYCastJSValue_(int)
 472 CYCastJSValue_(unsigned int)
 473 CYCastJSValue_(long int)
 474 CYCastJSValue_(long unsigned int)
 475 CYCastJSValue_(long long int)
 476 CYCastJSValue_(long long unsigned int)
 477
 478 JSValueRef CYJSUndefined(JSContextRef context) {
 479     return JSValueMakeUndefined(context);
 480 }
 481
 482 double CYCastDouble(const char *value, size_t size) {
 483     char *end;
 484     double number(strtod(value, &end));
 485     if (end != value + size)
 486         return NAN;
 487     return number;
 488 }
 489
 490 double CYCastDouble(const char *value) {
 491     return CYCastDouble(value, strlen(value));
 492 }
 493
 494 double CYCastDouble(JSContextRef context, JSValueRef value) {
 495     JSValueRef exception(NULL);
 496     double number(JSValueToNumber(context, value, &exception));
 497     CYThrow(context, exception);
 498     return number;
 499 }
 500
 501 bool CYCastBool(JSContextRef context, JSValueRef value) {
 502     return JSValueToBoolean(context, value);
 503 }
 504
 505 JSValueRef CYJSNull(JSContextRef context) {
 506     return JSValueMakeNull(context);
 507 }
 508
 509 JSValueRef CYCastJSValue(JSContextRef context, JSStringRef value) {
 510     return value == NULL ? CYJSNull(context) : JSValueMakeString(context, value);
 511 }
 512
 513 JSValueRef CYCastJSValue(JSContextRef context, const char *value) {
 514     return CYCastJSValue(context, CYJSString(value));
 515 }
 516
 517 JSObjectRef CYCastJSObject(JSContextRef context, JSValueRef value) {
 518     JSValueRef exception(NULL);
 519     JSObjectRef object(JSValueToObject(context, value, &exception));
 520     CYThrow(context, exception);
 521     return object;
 522 }
 523
 524 JSValueRef CYCallAsFunction(JSContextRef context, JSObjectRef function, JSObjectRef _this, size_t count, const JSValueRef arguments[]) {
 525     JSValueRef exception(NULL);
 526     JSValueRef value(JSObjectCallAsFunction(context, function, _this, count, arguments, &exception));
 527     CYThrow(context, exception);
 528     return value;
 529 }
 530
 531 bool CYIsCallable(JSContextRef context, JSValueRef value) {
 532     return value != NULL && JSValueIsObject(context, value) && JSObjectIsFunction(context, (JSObjectRef) value);
 533 }
 534
 535 static JSValueRef System_print(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 536     if (count == 0)
 537         printf("\n");
 538     else {
 539         CYPool pool;
 540         printf("%s\n", CYPoolCString(pool, context, arguments[0]));
 541     }
 542
 543     return CYJSUndefined(context);
 544 } CYCatch }
 545
 546 static size_t Nonce_(0);
 547
 548 static JSValueRef $cyq(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 549     CYPool pool;
 550     const char *name(apr_psprintf(pool, "%s%"APR_SIZE_T_FMT"", CYPoolCString(pool, context, arguments[0]), Nonce_++));
 551     return CYCastJSValue(context, name);
 552 }
 553
 554 static JSValueRef Cycript_gc_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 555     JSGarbageCollect(context);
 556     return CYJSUndefined(context);
 557 }
 558
 559 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSValueRef value, JSValueRef *exception) { CYTry {
 560     switch (JSType type = JSValueGetType(context, value)) {
 561         case kJSTypeUndefined:
 562             return "undefined";
 563         case kJSTypeNull:
 564             return "null";
 565         case kJSTypeBoolean:
 566             return CYCastBool(context, value) ? "true" : "false";
 567
 568         case kJSTypeNumber: {
 569             std::ostringstream str;
 570             CYNumerify(str, CYCastDouble(context, value));
 571             std::string value(str.str());
 572             return apr_pstrmemdup(pool, value.c_str(), value.size());
 573         } break;
 574
 575         case kJSTypeString: {
 576             std::ostringstream str;
 577             CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, value)));
 578             CYStringify(str, string.data, string.size);
 579             std::string value(str.str());
 580             return apr_pstrmemdup(pool, value.c_str(), value.size());
 581         } break;
 582
 583         case kJSTypeObject:
 584             return CYPoolCCYON(pool, context, (JSObjectRef) value);
 585         default:
 586             throw CYJSError(context, "JSValueGetType() == 0x%x", type);
 587     }
 588 } CYCatch }
 589
 590 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSValueRef value) {
 591     JSValueRef exception(NULL);
 592     const char *cyon(CYPoolCCYON(pool, context, value, &exception));
 593     CYThrow(context, exception);
 594     return cyon;
 595 }
 596
 597 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSObjectRef object) {
 598     JSValueRef toCYON(CYGetProperty(context, object, toCYON_s));
 599     if (CYIsCallable(context, toCYON)) {
 600         JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toCYON, object, 0, NULL));
 601         _assert(value != NULL);
 602         return CYPoolCString(pool, context, value);
 603     }
 604
 605     JSValueRef toJSON(CYGetProperty(context, object, toJSON_s));
 606     if (CYIsCallable(context, toJSON)) {
 607         JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 608         JSValueRef exception(NULL);
 609         const char *cyon(CYPoolCCYON(pool, context, CYCallAsFunction(context, (JSObjectRef) toJSON, object, 1, arguments), &exception));
 610         CYThrow(context, exception);
 611         return cyon;
 612     }
 613
 614     std::ostringstream str;
 615
 616     str << '{';
 617
 618     // XXX: this is, sadly, going to leak
 619     JSPropertyNameArrayRef names(JSObjectCopyPropertyNames(context, object));
 620
 621     bool comma(false);
 622
 623     for (size_t index(0), count(JSPropertyNameArrayGetCount(names)); index != count; ++index) {
 624         JSStringRef name(JSPropertyNameArrayGetNameAtIndex(names, index));
 625         JSValueRef value(CYGetProperty(context, object, name));
 626
 627         if (comma)
 628             str << ',';
 629         else
 630             comma = true;
 631
 632         CYUTF8String string(CYPoolUTF8String(pool, context, name));
 633         if (CYIsKey(string))
 634             str << string.data;
 635         else
 636             CYStringify(str, string.data, string.size);
 637
 638         str << ':' << CYPoolCCYON(pool, context, value);
 639     }
 640
 641     str << '}';
 642
 643     JSPropertyNameArrayRelease(names);
 644
 645     std::string string(str.str());
 646     return apr_pstrmemdup(pool, string.c_str(), string.size());
 647 }
 648
 649 static JSValueRef Array_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 650     CYPool pool;
 651     std::ostringstream str;
 652
 653     str << '[';
 654
 655     JSValueRef length(CYGetProperty(context, _this, length_s));
 656     bool comma(false);
 657
 658     for (size_t index(0), count(CYCastDouble(context, length)); index != count; ++index) {
 659         JSValueRef value(CYGetProperty(context, _this, index));
 660
 661         if (comma)
 662             str << ',';
 663         else
 664             comma = true;
 665
 666         if (!JSValueIsUndefined(context, value))
 667             str << CYPoolCCYON(pool, context, value);
 668         else {
 669             str << ',';
 670             comma = false;
 671         }
 672     }
 673
 674     str << ']';
 675
 676     std::string value(str.str());
 677     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 678 } CYCatch }
 679
 680 JSObjectRef CYMakePointer(JSContextRef context, void *pointer, size_t length, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 681     Pointer *internal(new Pointer(pointer, context, owner, length, type));
 682     return JSObjectMake(context, Pointer_, internal);
 683 }
 684
 685 static JSObjectRef CYMakeFunctor(JSContextRef context, void (*function)(), const char *type) {
 686     cy::Functor *internal(new cy::Functor(type, function));
 687     return JSObjectMake(context, Functor_, internal);
 688 }
 689
 690 static bool CYGetOffset(apr_pool_t *pool, JSContextRef context, JSStringRef value, ssize_t &index) {
 691     return CYGetOffset(CYPoolCString(pool, context, value), index);
 692 }
 693
 694 void *CYCastPointer_(JSContextRef context, JSValueRef value) {
 695     switch (JSValueGetType(context, value)) {
 696         case kJSTypeNull:
 697             return NULL;
 698         /*case kJSTypeObject:
 699             if (JSValueIsObjectOfClass(context, value, Pointer_)) {
 700                 Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate((JSObjectRef) value)));
 701                 return internal->value_;
 702             }*/
 703         default:
 704             double number(CYCastDouble(context, value));
 705             if (std::isnan(number))
 706                 throw CYJSError(context, "cannot convert value to pointer");
 707             return reinterpret_cast<void *>(static_cast<uintptr_t>(static_cast<long long>(number)));
 708     }
 709 }
 710
 711 void CYPoolFFI(apr_pool_t *pool, JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, JSValueRef value) {
 712     switch (type->primitive) {
 713         case sig::boolean_P:
 714             *reinterpret_cast<bool *>(data) = JSValueToBoolean(context, value);
 715         break;
 716
 717 #define CYPoolFFI_(primitive, native) \
 718         case sig::primitive ## _P: \
 719             *reinterpret_cast<native *>(data) = CYCastDouble(context, value); \
 720         break;
 721
 722         CYPoolFFI_(uchar, unsigned char)
 723         CYPoolFFI_(char, char)
 724         CYPoolFFI_(ushort, unsigned short)
 725         CYPoolFFI_(short, short)
 726         CYPoolFFI_(ulong, unsigned long)
 727         CYPoolFFI_(long, long)
 728         CYPoolFFI_(uint, unsigned int)
 729         CYPoolFFI_(int, int)
 730         CYPoolFFI_(ulonglong, unsigned long long)
 731         CYPoolFFI_(longlong, long long)
 732         CYPoolFFI_(float, float)
 733         CYPoolFFI_(double, double)
 734
 735         case sig::array_P: {
 736             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 737             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 738             for (size_t index(0); index != type->data.data.size; ++index) {
 739                 ffi_type *field(ffi->elements[index]);
 740
 741                 JSValueRef rhs;
 742                 if (aggregate == NULL)
 743                     rhs = value;
 744                 else {
 745                     rhs = CYGetProperty(context, aggregate, index);
 746                     if (JSValueIsUndefined(context, rhs))
 747                         throw CYJSError(context, "unable to extract array value");
 748                 }
 749
 750                 CYPoolFFI(pool, context, type->data.data.type, field, base, rhs);
 751                 // XXX: alignment?
 752                 base += field->size;
 753             }
 754         } break;
 755
 756         case sig::pointer_P:
 757             *reinterpret_cast<void **>(data) = CYCastPointer<void *>(context, value);
 758         break;
 759
 760         case sig::string_P:
 761             *reinterpret_cast<const char **>(data) = CYPoolCString(pool, context, value);
 762         break;
 763
 764         case sig::struct_P: {
 765             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 766             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 767             for (size_t index(0); index != type->data.signature.count; ++index) {
 768                 sig::Element *element(&type->data.signature.elements[index]);
 769                 ffi_type *field(ffi->elements[index]);
 770
 771                 JSValueRef rhs;
 772                 if (aggregate == NULL)
 773                     rhs = value;
 774                 else {
 775                     rhs = CYGetProperty(context, aggregate, index);
 776                     if (JSValueIsUndefined(context, rhs)) {
 777                         if (element->name != NULL)
 778                             rhs = CYGetProperty(context, aggregate, CYJSString(element->name));
 779                         else
 780                             goto undefined;
 781                         if (JSValueIsUndefined(context, rhs)) undefined:
 782                             throw CYJSError(context, "unable to extract structure value");
 783                     }
 784                 }
 785
 786                 CYPoolFFI(pool, context, element->type, field, base, rhs);
 787                 // XXX: alignment?
 788                 base += field->size;
 789             }
 790         } break;
 791
 792         case sig::void_P:
 793         break;
 794
 795         default:
 796             if (hooks_ != NULL && hooks_->PoolFFI != NULL)
 797                 if ((*hooks_->PoolFFI)(pool, context, type, ffi, data, value))
 798                     return;
 799
 800             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 801     }
 802 }
 803
 804 JSValueRef CYFromFFI(JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, bool initialize, JSObjectRef owner) {
 805     switch (type->primitive) {
 806         case sig::boolean_P:
 807             return CYCastJSValue(context, *reinterpret_cast<bool *>(data));
 808
 809 #define CYFromFFI_(primitive, native) \
 810         case sig::primitive ## _P: \
 811             return CYCastJSValue(context, *reinterpret_cast<native *>(data)); \
 812
 813         CYFromFFI_(uchar, unsigned char)
 814         CYFromFFI_(char, char)
 815         CYFromFFI_(ushort, unsigned short)
 816         CYFromFFI_(short, short)
 817         CYFromFFI_(ulong, unsigned long)
 818         CYFromFFI_(long, long)
 819         CYFromFFI_(uint, unsigned int)
 820         CYFromFFI_(int, int)
 821         CYFromFFI_(ulonglong, unsigned long long)
 822         CYFromFFI_(longlong, long long)
 823         CYFromFFI_(float, float)
 824         CYFromFFI_(double, double)
 825
 826         case sig::array_P:
 827             if (void *pointer = data)
 828                 return CYMakePointer(context, pointer, type->data.data.size, type->data.data.type, NULL, owner);
 829             else goto null;
 830
 831         case sig::pointer_P:
 832             if (void *pointer = *reinterpret_cast<void **>(data))
 833                 return CYMakePointer(context, pointer, _not(size_t), type->data.data.type, NULL, owner);
 834             else goto null;
 835
 836         case sig::string_P:
 837             if (char *utf8 = *reinterpret_cast<char **>(data))
 838                 return CYCastJSValue(context, utf8);
 839             else goto null;
 840
 841         case sig::struct_P:
 842             return CYMakeStruct(context, data, type, ffi, owner);
 843         case sig::void_P:
 844             return CYJSUndefined(context);
 845
 846         null:
 847             return CYJSNull(context);
 848         default:
 849             if (hooks_ != NULL && hooks_->FromFFI != NULL)
 850                 if (JSValueRef value = (*hooks_->FromFFI)(context, type, ffi, data, initialize, owner))
 851                     return value;
 852
 853             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 854     }
 855 }
 856
 857 static void FunctionClosure_(ffi_cif *cif, void *result, void **arguments, void *arg) {
 858     Closure_privateData *internal(reinterpret_cast<Closure_privateData *>(arg));
 859
 860     JSContextRef context(internal->context_);
 861
 862     size_t count(internal->cif_.nargs);
 863     JSValueRef values[count];
 864
 865     for (size_t index(0); index != count; ++index)
 866         values[index] = CYFromFFI(context, internal->signature_.elements[1 + index].type, internal->cif_.arg_types[index], arguments[index]);
 867
 868     JSValueRef value(CYCallAsFunction(context, internal->function_, NULL, count, values));
 869     CYPoolFFI(NULL, context, internal->signature_.elements[0].type, internal->cif_.rtype, result, value);
 870 }
 871
 872 Closure_privateData *CYMakeFunctor_(JSContextRef context, JSObjectRef function, const char *type, void (*callback)(ffi_cif *, void *, void **, void *)) {
 873     // XXX: in case of exceptions this will leak
 874     // XXX: in point of fact, this may /need/ to leak :(
 875     Closure_privateData *internal(new Closure_privateData(context, function, type));
 876
 877     ffi_closure *closure((ffi_closure *) _syscall(mmap(
 878         NULL, sizeof(ffi_closure),
 879         PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE,
 880         -1, 0
 881     )));
 882
 883     ffi_status status(ffi_prep_closure(closure, &internal->cif_, callback, internal));
 884     _assert(status == FFI_OK);
 885
 886     _syscall(mprotect(closure, sizeof(*closure), PROT_READ | PROT_EXEC));
 887
 888     internal->value_ = closure;
 889
 890     return internal;
 891 }
 892
 893 static JSObjectRef CYMakeFunctor(JSContextRef context, JSObjectRef function, const char *type) {
 894     Closure_privateData *internal(CYMakeFunctor_(context, function, type, &FunctionClosure_));
 895     JSObjectRef object(JSObjectMake(context, Functor_, internal));
 896     // XXX: see above notes about needing to leak
 897     JSValueProtect(CYGetJSContext(context), object);
 898     return object;
 899 }
 900
 901 JSObjectRef CYGetCachedObject(JSContextRef context, JSStringRef name) {
 902     return CYCastJSObject(context, CYGetProperty(context, CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s)), name));
 903 }
 904
 905 static JSObjectRef CYMakeFunctor(JSContextRef context, JSValueRef value, const char *type) {
 906     JSObjectRef Function(CYGetCachedObject(context, CYJSString("Function")));
 907
 908     JSValueRef exception(NULL);
 909     bool function(JSValueIsInstanceOfConstructor(context, value, Function, &exception));
 910     CYThrow(context, exception);
 911
 912     if (function) {
 913         JSObjectRef function(CYCastJSObject(context, value));
 914         return CYMakeFunctor(context, function, type);
 915     } else {
 916         void (*function)()(CYCastPointer<void (*)()>(context, value));
 917         return CYMakeFunctor(context, function, type);
 918     }
 919 }
 920
 921 static bool Index_(apr_pool_t *pool, JSContextRef context, Struct_privateData *internal, JSStringRef property, ssize_t &index, uint8_t *&base) {
 922     Type_privateData *typical(internal->type_);
 923     sig::Type *type(typical->type_);
 924     if (type == NULL)
 925         return false;
 926
 927     const char *name(CYPoolCString(pool, context, property));
 928     size_t length(strlen(name));
 929     double number(CYCastDouble(name, length));
 930
 931     size_t count(type->data.signature.count);
 932
 933     if (std::isnan(number)) {
 934         if (property == NULL)
 935             return false;
 936
 937         sig::Element *elements(type->data.signature.elements);
 938
 939         for (size_t local(0); local != count; ++local) {
 940             sig::Element *element(&elements[local]);
 941             if (element->name != NULL && strcmp(name, element->name) == 0) {
 942                 index = local;
 943                 goto base;
 944             }
 945         }
 946
 947         return false;
 948     } else {
 949         index = static_cast<ssize_t>(number);
 950         if (index != number || index < 0 || static_cast<size_t>(index) >= count)
 951             return false;
 952     }
 953
 954   base:
 955     ffi_type **elements(typical->GetFFI()->elements);
 956
 957     base = reinterpret_cast<uint8_t *>(internal->value_);
 958     for (ssize_t local(0); local != index; ++local)
 959         base += elements[local]->size;
 960
 961     return true;
 962 }
 963
 964 static JSValueRef Pointer_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 965     CYPool pool;
 966     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 967
 968     if (JSStringIsEqual(property, length_s))
 969         return internal->length_ == _not(size_t) ? CYJSUndefined(context) : CYCastJSValue(context, internal->length_);
 970
 971     Type_privateData *typical(internal->type_);
 972
 973     if (typical->type_ == NULL)
 974         return NULL;
 975
 976     ssize_t offset;
 977     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 978         offset = 0;
 979     else if (!CYGetOffset(pool, context, property, offset))
 980         return NULL;
 981
 982     ffi_type *ffi(typical->GetFFI());
 983
 984     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 985     base += ffi->size * offset;
 986
 987     JSObjectRef owner(internal->GetOwner() ?: object);
 988     return CYFromFFI(context, typical->type_, ffi, base, false, owner);
 989 } CYCatch }
 990
 991 static bool Pointer_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 992     CYPool pool;
 993     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 994     Type_privateData *typical(internal->type_);
 995
 996     if (typical->type_ == NULL)
 997         return NULL;
 998
 999     ssize_t offset;
1000     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
1001         offset = 0;
1002     else if (!CYGetOffset(pool, context, property, offset))
1003         return NULL;
1004
1005     ffi_type *ffi(typical->GetFFI());
1006
1007     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
1008     base += ffi->size * offset;
1009
1010     CYPoolFFI(NULL, context, typical->type_, ffi, base, value);
1011     return true;
1012 } CYCatch }
1013
1014 static JSValueRef Struct_callAsFunction_$cya(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1015     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(_this)));
1016     Type_privateData *typical(internal->type_);
1017     return CYMakePointer(context, internal->value_, _not(size_t), typical->type_, typical->ffi_, _this);
1018 }
1019
1020 static JSValueRef Struct_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1021     CYPool pool;
1022     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
1023     Type_privateData *typical(internal->type_);
1024
1025     ssize_t index;
1026     uint8_t *base;
1027
1028     if (!Index_(pool, context, internal, property, index, base))
1029         return NULL;
1030
1031     JSObjectRef owner(internal->GetOwner() ?: object);
1032
1033     return CYFromFFI(context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, false, owner);
1034 } CYCatch }
1035
1036 static bool Struct_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
1037     CYPool pool;
1038     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
1039     Type_privateData *typical(internal->type_);
1040
1041     ssize_t index;
1042     uint8_t *base;
1043
1044     if (!Index_(pool, context, internal, property, index, base))
1045         return false;
1046
1047     CYPoolFFI(NULL, context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, value);
1048     return true;
1049 } CYCatch }
1050
1051 static void Struct_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
1052     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
1053     Type_privateData *typical(internal->type_);
1054     sig::Type *type(typical->type_);
1055
1056     if (type == NULL)
1057         return;
1058
1059     size_t count(type->data.signature.count);
1060     sig::Element *elements(type->data.signature.elements);
1061
1062     char number[32];
1063
1064     for (size_t index(0); index != count; ++index) {
1065         const char *name;
1066         name = elements[index].name;
1067
1068         if (name == NULL) {
1069             sprintf(number, "%zu", index);
1070             name = number;
1071         }
1072
1073         JSPropertyNameAccumulatorAddName(names, CYJSString(name));
1074     }
1075 }
1076
1077 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 {
1078     if (setups + count != signature->count - 1)
1079         throw CYJSError(context, "incorrect number of arguments to ffi function");
1080
1081     size_t size(setups + count);
1082     void *values[size];
1083     memcpy(values, setup, sizeof(void *) * setups);
1084
1085     for (size_t index(setups); index != size; ++index) {
1086         sig::Element *element(&signature->elements[index + 1]);
1087         ffi_type *ffi(cif->arg_types[index]);
1088         // XXX: alignment?
1089         values[index] = new(pool) uint8_t[ffi->size];
1090         CYPoolFFI(pool, context, element->type, ffi, values[index], arguments[index - setups]);
1091     }
1092
1093     uint8_t value[cif->rtype->size];
1094
1095     if (hooks_ != NULL && hooks_->CallFunction != NULL)
1096         (*hooks_->CallFunction)(context, cif, function, value, values);
1097     else
1098         ffi_call(cif, function, value, values);
1099
1100     return CYFromFFI(context, signature->elements[0].type, cif->rtype, value, initialize);
1101 } CYCatch }
1102
1103 static JSValueRef Functor_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1104     CYPool pool;
1105     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
1106     return CYCallFunction(pool, context, 0, NULL, count, arguments, false, exception, &internal->signature_, &internal->cif_, internal->GetValue());
1107 }
1108
1109 static JSObjectRef CYMakeType(JSContextRef context, const char *type) {
1110     Type_privateData *internal(new Type_privateData(type));
1111     return JSObjectMake(context, Type_privateData::Class_, internal);
1112 }
1113
1114 static JSObjectRef CYMakeType(JSContextRef context, sig::Type *type) {
1115     Type_privateData *internal(new Type_privateData(type));
1116     return JSObjectMake(context, Type_privateData::Class_, internal);
1117 }
1118
1119 static void *CYCastSymbol(const char *name) {
1120     return dlsym(RTLD_DEFAULT, name);
1121 }
1122
1123 static JSValueRef Runtime_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1124     CYPool pool;
1125     CYUTF8String name(CYPoolUTF8String(pool, context, property));
1126
1127     if (hooks_ != NULL && hooks_->RuntimeProperty != NULL)
1128         if (JSValueRef value = (*hooks_->RuntimeProperty)(context, name))
1129             return value;
1130
1131     sqlite3_stmt *statement;
1132
1133     _sqlcall(sqlite3_prepare(Bridge_,
1134         "select "
1135             "\"bridge\".\"mode\", "
1136             "\"bridge\".\"value\" "
1137         "from \"bridge\" "
1138         "where"
1139             " \"bridge\".\"name\" = ?"
1140         " limit 1"
1141     , -1, &statement, NULL));
1142
1143     _sqlcall(sqlite3_bind_text(statement, 1, name.data, name.size, SQLITE_STATIC));
1144
1145     int mode;
1146     const char *value;
1147
1148     if (_sqlcall(sqlite3_step(statement)) == SQLITE_DONE) {
1149         mode = -1;
1150         value = NULL;
1151     } else {
1152         mode = sqlite3_column_int(statement, 0);
1153         value = sqlite3_column_pooled(pool, statement, 1);
1154     }
1155
1156     _sqlcall(sqlite3_finalize(statement));
1157
1158     switch (mode) {
1159         default:
1160             _assert(false);
1161         case -1:
1162             return NULL;
1163
1164         case 0:
1165             return JSEvaluateScript(CYGetJSContext(context), CYJSString(value), NULL, NULL, 0, NULL);
1166
1167         case 1:
1168             if (void (*symbol)() = reinterpret_cast<void (*)()>(CYCastSymbol(name.data)))
1169                 return CYMakeFunctor(context, symbol, value);
1170             else return NULL;
1171
1172         case 2:
1173             if (void *symbol = CYCastSymbol(name.data)) {
1174                 // XXX: this is horrendously inefficient
1175                 sig::Signature signature;
1176                 sig::Parse(pool, &signature, value, &Structor_);
1177                 ffi_cif cif;
1178                 sig::sig_ffi_cif(pool, &sig::ObjectiveC, &signature, &cif);
1179                 return CYFromFFI(context, signature.elements[0].type, cif.rtype, symbol);
1180             } else return NULL;
1181
1182         // XXX: implement case 3
1183         case 4:
1184             return CYMakeType(context, value);
1185     }
1186 } CYCatch }
1187
1188 static JSObjectRef Pointer_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1189     if (count != 2)
1190         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1191
1192     CYPool pool;
1193
1194     void *value(CYCastPointer<void *>(context, arguments[0]));
1195     const char *type(CYPoolCString(pool, context, arguments[1]));
1196
1197     sig::Signature signature;
1198     sig::Parse(pool, &signature, type, &Structor_);
1199
1200     return CYMakePointer(context, value, _not(size_t), signature.elements[0].type, NULL, NULL);
1201 } CYCatch }
1202
1203 static JSObjectRef Type_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1204     if (count != 1)
1205         throw CYJSError(context, "incorrect number of arguments to Type constructor");
1206     CYPool pool;
1207     const char *type(CYPoolCString(pool, context, arguments[0]));
1208     return CYMakeType(context, type);
1209 } CYCatch }
1210
1211 static JSValueRef Type_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1212     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1213
1214     sig::Type type;
1215
1216     if (JSStringIsEqualToUTF8CString(property, "$cyi")) {
1217         type.primitive = sig::pointer_P;
1218         type.data.data.size = 0;
1219     } else {
1220         CYPool pool;
1221         size_t index(CYGetIndex(pool, context, property));
1222         if (index == _not(size_t))
1223             return NULL;
1224         type.primitive = sig::array_P;
1225         type.data.data.size = index;
1226     }
1227
1228     type.name = NULL;
1229     type.flags = 0;
1230
1231     type.data.data.type = internal->type_;
1232
1233     return CYMakeType(context, &type);
1234 } CYCatch }
1235
1236 static JSValueRef Type_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1237     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1238
1239     if (count != 1)
1240         throw CYJSError(context, "incorrect number of arguments to type cast function");
1241     sig::Type *type(internal->type_);
1242     ffi_type *ffi(internal->GetFFI());
1243     // XXX: alignment?
1244     uint8_t value[ffi->size];
1245     CYPool pool;
1246     CYPoolFFI(pool, context, type, ffi, value, arguments[0]);
1247     return CYFromFFI(context, type, ffi, value);
1248 } CYCatch }
1249
1250 static JSObjectRef Type_callAsConstructor(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1251     if (count != 0)
1252         throw CYJSError(context, "incorrect number of arguments to type cast function");
1253     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1254
1255     sig::Type *type(internal->type_);
1256     size_t length;
1257
1258     if (type->primitive != sig::array_P)
1259         length = _not(size_t);
1260     else {
1261         length = type->data.data.size;
1262         type = type->data.data.type;
1263     }
1264
1265     void *value(malloc(internal->GetFFI()->size));
1266     return CYMakePointer(context, value, length, type, NULL, NULL);
1267 } CYCatch }
1268
1269 static JSObjectRef Functor_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1270     if (count != 2)
1271         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1272     CYPool pool;
1273     const char *type(CYPoolCString(pool, context, arguments[1]));
1274     return CYMakeFunctor(context, arguments[0], type);
1275 } CYCatch }
1276
1277 static JSValueRef CYValue_callAsFunction_valueOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1278     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1279     return CYCastJSValue(context, reinterpret_cast<uintptr_t>(internal->value_));
1280 } CYCatch }
1281
1282 static JSValueRef CYValue_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1283     return CYValue_callAsFunction_valueOf(context, object, _this, count, arguments, exception);
1284 }
1285
1286 static JSValueRef CYValue_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1287     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1288     char string[32];
1289     sprintf(string, "%p", internal->value_);
1290     return CYCastJSValue(context, string);
1291 } CYCatch }
1292
1293 static JSValueRef Pointer_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1294     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(_this)));
1295     if (internal->length_ != _not(size_t)) {
1296         JSObjectRef Array(CYGetCachedObject(context, Array_s));
1297         JSObjectRef toCYON(CYCastJSObject(context, CYGetProperty(context, Array, toCYON_s)));
1298         return CYCallAsFunction(context, toCYON, _this, count, arguments);
1299     } else {
1300         char string[32];
1301         sprintf(string, "%p", internal->value_);
1302         return CYCastJSValue(context, string);
1303     }
1304 } CYCatch }
1305
1306 static JSValueRef Type_callAsFunction_toString(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1307     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1308     CYPool pool;
1309     const char *type(sig::Unparse(pool, internal->type_));
1310     return CYCastJSValue(context, CYJSString(type));
1311 } CYCatch }
1312
1313 static JSValueRef Type_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1314     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1315     CYPool pool;
1316     const char *type(sig::Unparse(pool, internal->type_));
1317     size_t size(strlen(type));
1318     char *cyon(new(pool) char[12 + size + 1]);
1319     memcpy(cyon, "new Type(\"", 10);
1320     cyon[12 + size] = '\0';
1321     cyon[12 + size - 2] = '"';
1322     cyon[12 + size - 1] = ')';
1323     memcpy(cyon + 10, type, size);
1324     return CYCastJSValue(context, CYJSString(cyon));
1325 } CYCatch }
1326
1327 static JSValueRef Type_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1328     return Type_callAsFunction_toString(context, object, _this, count, arguments, exception);
1329 }
1330
1331 static JSStaticFunction Pointer_staticFunctions[4] = {
1332     {"toCYON", &Pointer_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1333     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1334     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1335     {NULL, NULL, 0}
1336 };
1337
1338 static JSStaticFunction Struct_staticFunctions[2] = {
1339     {"$cya", &Struct_callAsFunction_$cya, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1340     {NULL, NULL, 0}
1341 };
1342
1343 static JSStaticFunction Functor_staticFunctions[4] = {
1344     {"toCYON", &CYValue_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1345     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1346     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1347     {NULL, NULL, 0}
1348 };
1349
1350 namespace cy {
1351     JSStaticFunction const * const Functor::StaticFunctions = Functor_staticFunctions;
1352 }
1353
1354 static JSStaticFunction Type_staticFunctions[4] = {
1355     {"toCYON", &Type_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1356     {"toJSON", &Type_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1357     {"toString", &Type_callAsFunction_toString, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1358     {NULL, NULL, 0}
1359 };
1360
1361 static JSObjectRef (*JSObjectMakeArray$)(JSContextRef, size_t, const JSValueRef[], JSValueRef *);
1362
1363 void CYSetArgs(int argc, const char *argv[]) {
1364     JSContextRef context(CYGetJSContext());
1365     JSValueRef args[argc];
1366     for (int i(0); i != argc; ++i)
1367         args[i] = CYCastJSValue(context, argv[i]);
1368
1369     JSObjectRef array;
1370     if (JSObjectMakeArray$ != NULL) {
1371         JSValueRef exception(NULL);
1372         array = (*JSObjectMakeArray$)(context, argc, args, &exception);
1373         CYThrow(context, exception);
1374     } else {
1375         JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array")));
1376         JSValueRef value(CYCallAsFunction(context, Array, NULL, argc, args));
1377         array = CYCastJSObject(context, value);
1378     }
1379
1380     JSObjectRef System(CYGetCachedObject(context, CYJSString("System")));
1381     CYSetProperty(context, System, CYJSString("args"), array);
1382 }
1383
1384 JSObjectRef CYGetGlobalObject(JSContextRef context) {
1385     return JSContextGetGlobalObject(context);
1386 }
1387
1388 const char *CYExecute(apr_pool_t *pool, const char *code) {
1389     JSContextRef context(CYGetJSContext());
1390     JSValueRef exception(NULL), result;
1391
1392     void *handle;
1393     if (hooks_ != NULL && hooks_->ExecuteStart != NULL)
1394         handle = (*hooks_->ExecuteStart)(context);
1395     else
1396         handle = NULL;
1397
1398     const char *json;
1399
1400     try {
1401         result = JSEvaluateScript(context, CYJSString(code), NULL, NULL, 0, &exception);
1402     } catch (const char *error) {
1403         return error;
1404     }
1405
1406     if (exception != NULL) { error:
1407         result = exception;
1408         exception = NULL;
1409     }
1410
1411     if (JSValueIsUndefined(context, result))
1412         return NULL;
1413
1414     try {
1415         json = CYPoolCCYON(pool, context, result, &exception);
1416     } catch (const char *error) {
1417         return error;
1418     }
1419
1420     if (exception != NULL)
1421         goto error;
1422
1423     CYSetProperty(context, CYGetGlobalObject(context), Result_, result);
1424
1425     if (hooks_ != NULL && hooks_->ExecuteEnd != NULL)
1426         (*hooks_->ExecuteEnd)(context, handle);
1427     return json;
1428 }
1429
1430 static apr_pool_t *Pool_;
1431
1432 static bool initialized_;
1433
1434 void CYInitialize() {
1435     if (!initialized_)
1436         initialized_ = true;
1437     else return;
1438
1439     _aprcall(apr_initialize());
1440     _aprcall(apr_pool_create(&Pool_, NULL));
1441     _sqlcall(sqlite3_open("/usr/lib/libcycript.db", &Bridge_));
1442
1443     JSObjectMakeArray$ = reinterpret_cast<JSObjectRef (*)(JSContextRef, size_t, const JSValueRef[], JSValueRef *)>(dlsym(RTLD_DEFAULT, "JSObjectMakeArray"));
1444
1445     JSClassDefinition definition;
1446
1447     definition = kJSClassDefinitionEmpty;
1448     definition.className = "Context";
1449     definition.finalize = &CYFinalize;
1450     Context_ = JSClassCreate(&definition);
1451
1452     definition = kJSClassDefinitionEmpty;
1453     definition.className = "Functor";
1454     definition.staticFunctions = cy::Functor::StaticFunctions;
1455     definition.callAsFunction = &Functor_callAsFunction;
1456     definition.finalize = &CYFinalize;
1457     Functor_ = JSClassCreate(&definition);
1458
1459     definition = kJSClassDefinitionEmpty;
1460     definition.className = "Pointer";
1461     definition.staticFunctions = Pointer_staticFunctions;
1462     definition.getProperty = &Pointer_getProperty;
1463     definition.setProperty = &Pointer_setProperty;
1464     definition.finalize = &CYFinalize;
1465     Pointer_ = JSClassCreate(&definition);
1466
1467     definition = kJSClassDefinitionEmpty;
1468     definition.className = "Struct";
1469     definition.staticFunctions = Struct_staticFunctions;
1470     definition.getProperty = &Struct_getProperty;
1471     definition.setProperty = &Struct_setProperty;
1472     definition.getPropertyNames = &Struct_getPropertyNames;
1473     definition.finalize = &CYFinalize;
1474     Struct_ = JSClassCreate(&definition);
1475
1476     definition = kJSClassDefinitionEmpty;
1477     definition.className = "Type";
1478     definition.staticFunctions = Type_staticFunctions;
1479     definition.getProperty = &Type_getProperty;
1480     definition.callAsFunction = &Type_callAsFunction;
1481     definition.callAsConstructor = &Type_callAsConstructor;
1482     definition.finalize = &CYFinalize;
1483     Type_privateData::Class_ = JSClassCreate(&definition);
1484
1485     definition = kJSClassDefinitionEmpty;
1486     definition.className = "Runtime";
1487     definition.getProperty = &Runtime_getProperty;
1488     Runtime_ = JSClassCreate(&definition);
1489
1490     definition = kJSClassDefinitionEmpty;
1491     //definition.getProperty = &Global_getProperty;
1492     Global_ = JSClassCreate(&definition);
1493
1494     Array_s = JSStringCreateWithUTF8CString("Array");
1495     cy_s = JSStringCreateWithUTF8CString("$cy");
1496     length_s = JSStringCreateWithUTF8CString("length");
1497     message_s = JSStringCreateWithUTF8CString("message");
1498     name_s = JSStringCreateWithUTF8CString("name");
1499     pop_s = JSStringCreateWithUTF8CString("pop");
1500     prototype_s = JSStringCreateWithUTF8CString("prototype");
1501     push_s = JSStringCreateWithUTF8CString("push");
1502     splice_s = JSStringCreateWithUTF8CString("splice");
1503     toCYON_s = JSStringCreateWithUTF8CString("toCYON");
1504     toJSON_s = JSStringCreateWithUTF8CString("toJSON");
1505
1506     Result_ = JSStringCreateWithUTF8CString("_");
1507
1508     if (hooks_ != NULL && hooks_->Initialize != NULL)
1509         (*hooks_->Initialize)();
1510 }
1511
1512 apr_pool_t *CYGetGlobalPool() {
1513     CYInitialize();
1514     return Pool_;
1515 }
1516
1517 void CYThrow(JSContextRef context, JSValueRef value) {
1518     if (value != NULL)
1519         throw CYJSError(context, value);
1520 }
1521
1522 const char *CYJSError::PoolCString(apr_pool_t *pool) const {
1523     // XXX: this used to be CYPoolCString
1524     return CYPoolCCYON(pool, context_, value_);
1525 }
1526
1527 JSValueRef CYJSError::CastJSValue(JSContextRef context) const {
1528     // XXX: what if the context is different?
1529     return value_;
1530 }
1531
1532 void CYThrow(const char *format, ...) {
1533     va_list args;
1534     va_start(args, format);
1535     throw CYPoolError(format, args);
1536     // XXX: does this matter? :(
1537     va_end(args);
1538 }
1539
1540 const char *CYPoolError::PoolCString(apr_pool_t *pool) const {
1541     return apr_pstrdup(pool, message_);
1542 }
1543
1544 CYPoolError::CYPoolError(const char *format, ...) {
1545     va_list args;
1546     va_start(args, format);
1547     message_ = apr_pvsprintf(pool_, format, args);
1548     va_end(args);
1549 }
1550
1551 CYPoolError::CYPoolError(const char *format, va_list args) {
1552     message_ = apr_pvsprintf(pool_, format, args);
1553 }
1554
1555 JSValueRef CYCastJSError(JSContextRef context, const char *message) {
1556     JSObjectRef Error(CYGetCachedObject(context, CYJSString("Error")));
1557
1558     JSValueRef arguments[1] = {CYCastJSValue(context, message)};
1559
1560     JSValueRef exception(NULL);
1561     JSValueRef value(JSObjectCallAsConstructor(context, Error, 1, arguments, &exception));
1562     CYThrow(context, exception);
1563
1564     return value;
1565 }
1566
1567 JSValueRef CYPoolError::CastJSValue(JSContextRef context) const {
1568     return CYCastJSError(context, message_);
1569 }
1570
1571 CYJSError::CYJSError(JSContextRef context, const char *format, ...) {
1572     _assert(context != NULL);
1573
1574     CYPool pool;
1575
1576     va_list args;
1577     va_start(args, format);
1578     const char *message(apr_pvsprintf(pool, format, args));
1579     va_end(args);
1580
1581     value_ = CYCastJSError(context, message);
1582 }
1583
1584 JSGlobalContextRef CYGetJSContext(JSContextRef context) {
1585     return reinterpret_cast<Context *>(JSObjectGetPrivate(CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s))))->context_;
1586 }
1587
1588 void CYSetupContext(JSGlobalContextRef context) {
1589     JSObjectRef global(CYGetGlobalObject(context));
1590
1591     JSObjectRef cy(JSObjectMake(context, Context_, new Context(context)));
1592     CYSetProperty(context, global, cy_s, cy, kJSPropertyAttributeDontEnum);
1593
1594     JSObjectRef Array(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Array"))));
1595     CYSetProperty(context, cy, CYJSString("Array"), Array);
1596
1597     JSObjectRef Array_prototype(CYCastJSObject(context, CYGetProperty(context, Array, prototype_s)));
1598     CYSetProperty(context, cy, CYJSString("Array_prototype"), Array_prototype);
1599
1600     JSObjectRef Error(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Error"))));
1601     CYSetProperty(context, cy, CYJSString("Error"), Error);
1602
1603     JSObjectRef Function(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Function"))));
1604     CYSetProperty(context, cy, CYJSString("Function"), Function);
1605
1606     JSObjectRef Function_prototype(CYCastJSObject(context, CYGetProperty(context, Function, prototype_s)));
1607     CYSetProperty(context, cy, CYJSString("Function_prototype"), Function_prototype);
1608
1609     JSObjectRef Object(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Object"))));
1610     CYSetProperty(context, cy, CYJSString("Object"), Object);
1611
1612     JSObjectRef Object_prototype(CYCastJSObject(context, CYGetProperty(context, Object, prototype_s)));
1613     CYSetProperty(context, cy, CYJSString("Object_prototype"), Object_prototype);
1614
1615     JSObjectRef String(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("String"))));
1616     CYSetProperty(context, cy, CYJSString("String"), String);
1617
1618     JSObjectSetPrototype(context, global, JSObjectMake(context, Runtime_, NULL));
1619
1620     CYSetProperty(context, Array_prototype, toCYON_s, &Array_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1621
1622     JSObjectRef Functor(JSObjectMakeConstructor(context, Functor_, &Functor_new));
1623     JSObjectSetPrototype(context, CYCastJSObject(context, CYGetProperty(context, Functor, prototype_s)), Function_prototype);
1624     CYSetProperty(context, global, CYJSString("Functor"), Functor);
1625
1626     CYSetProperty(context, global, CYJSString("Pointer"), JSObjectMakeConstructor(context, Pointer_, &Pointer_new));
1627     CYSetProperty(context, global, CYJSString("Type"), JSObjectMakeConstructor(context, Type_privateData::Class_, &Type_new));
1628
1629     JSObjectRef cycript(JSObjectMake(context, NULL, NULL));
1630     CYSetProperty(context, global, CYJSString("Cycript"), cycript);
1631     CYSetProperty(context, cycript, CYJSString("gc"), &Cycript_gc_callAsFunction);
1632
1633     CYSetProperty(context, global, CYJSString("$cyq"), &$cyq);
1634
1635     JSObjectRef System(JSObjectMake(context, NULL, NULL));
1636     CYSetProperty(context, cy, CYJSString("System"), Function);
1637
1638     CYSetProperty(context, global, CYJSString("system"), System);
1639     CYSetProperty(context, System, CYJSString("args"), CYJSNull(context));
1640     //CYSetProperty(context, System, CYJSString("global"), global);
1641     CYSetProperty(context, System, CYJSString("print"), &System_print);
1642
1643     if (hooks_ != NULL && hooks_->SetupContext != NULL)
1644         (*hooks_->SetupContext)(context);
1645 }
1646
1647 JSGlobalContextRef CYGetJSContext() {
1648     CYInitialize();
1649
1650     static JSGlobalContextRef context_;
1651
1652     if (context_ == NULL) {
1653         context_ = JSGlobalContextCreate(Global_);
1654         CYSetupContext(context_);
1655     }
1656
1657     return context_;
1658 }