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 /* JavaScript Strings {{{ */
 117 JSStringRef CYCopyJSString(const char *value) {
 118     return value == NULL ? NULL : JSStringCreateWithUTF8CString(value);
 119 }
 120
 121 JSStringRef CYCopyJSString(JSStringRef value) {
 122     return value == NULL ? NULL : JSStringRetain(value);
 123 }
 124
 125 JSStringRef CYCopyJSString(CYUTF8String value) {
 126     // XXX: this is very wrong
 127     return CYCopyJSString(value.data);
 128 }
 129
 130 JSStringRef CYCopyJSString(JSContextRef context, JSValueRef value) {
 131     if (JSValueIsNull(context, value))
 132         return NULL;
 133     JSValueRef exception(NULL);
 134     JSStringRef string(JSValueToStringCopy(context, value, &exception));
 135     CYThrow(context, exception);
 136     return string;
 137 }
 138
 139 static CYUTF16String CYCastUTF16String(JSStringRef value) {
 140     return CYUTF16String(JSStringGetCharactersPtr(value), JSStringGetLength(value));
 141 }
 142
 143 template <typename Type_>
 144 _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) {
 145     return iconv(cd, const_cast<Type_>(inbuf), inbytesleft, outbuf, outbytesleft);
 146 }
 147
 148 CYUTF8String CYPoolUTF8String(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 149     _assert(pool != NULL);
 150
 151     CYUTF16String utf16(CYCastUTF16String(value));
 152     const char *in(reinterpret_cast<const char *>(utf16.data));
 153
 154 #ifdef __GLIBC__
 155     iconv_t conversion(_syscall(iconv_open("UTF-8", "UCS-2")));
 156 #else
 157     iconv_t conversion(_syscall(iconv_open("UTF-8", "UCS-2-INTERNAL")));
 158 #endif
 159
 160     size_t size(JSStringGetMaximumUTF8CStringSize(value));
 161     char *out(new(pool) char[size]);
 162     CYUTF8String utf8(out, size);
 163
 164     size = utf16.size * 2;
 165     _syscall(iconv_(&iconv, conversion, const_cast<char **>(&in), &size, &out, &utf8.size));
 166
 167     *out = '\0';
 168     utf8.size = out - utf8.data;
 169
 170     _syscall(iconv_close(conversion));
 171
 172     return utf8;
 173 }
 174
 175 const char *CYPoolCString(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 176     CYUTF8String utf8(CYPoolUTF8String(pool, context, value));
 177     _assert(memchr(utf8.data, '\0', utf8.size) == NULL);
 178     return utf8.data;
 179 }
 180
 181 const char *CYPoolCString(apr_pool_t *pool, JSContextRef context, JSValueRef value) {
 182     return JSValueIsNull(context, value) ? NULL : CYPoolCString(pool, context, CYJSString(context, value));
 183 }
 184 /* }}} */
 185
 186 /* Index Offsets {{{ */
 187 size_t CYGetIndex(const CYUTF8String &value) {
 188     if (value.data[0] != '0') {
 189         size_t index(0);
 190         for (size_t i(0); i != value.size; ++i) {
 191             if (!DigitRange_[value.data[i]])
 192                 return _not(size_t);
 193             index *= 10;
 194             index += value.data[i] - '0';
 195         }
 196         return index;
 197     } else if (value.size == 1)
 198         return 0;
 199     else
 200         return _not(size_t);
 201 }
 202
 203 size_t CYGetIndex(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 204     return CYGetIndex(CYPoolUTF8String(pool, context, value));
 205 }
 206
 207 // XXX: this isn't actually right
 208 bool CYGetOffset(const char *value, ssize_t &index) {
 209     if (value[0] != '0') {
 210         char *end;
 211         index = strtol(value, &end, 10);
 212         if (value + strlen(value) == end)
 213             return true;
 214     } else if (value[1] == '\0') {
 215         index = 0;
 216         return true;
 217     }
 218
 219     return false;
 220 }
 221 /* }}} */
 222
 223 /* JavaScript *ify {{{ */
 224 void CYStringify(std::ostringstream &str, const char *data, size_t size) {
 225     unsigned quot(0), apos(0);
 226     for (const char *value(data), *end(data + size); value != end; ++value)
 227         if (*value == '"')
 228             ++quot;
 229         else if (*value == '\'')
 230             ++apos;
 231
 232     bool single(quot > apos);
 233
 234     str << (single ? '\'' : '"');
 235
 236     for (const char *value(data), *end(data + size); value != end; ++value)
 237         switch (*value) {
 238             case '\\': str << "\\\\"; break;
 239             case '\b': str << "\\b"; break;
 240             case '\f': str << "\\f"; break;
 241             case '\n': str << "\\n"; break;
 242             case '\r': str << "\\r"; break;
 243             case '\t': str << "\\t"; break;
 244             case '\v': str << "\\v"; break;
 245
 246             case '"':
 247                 if (!single)
 248                     str << "\\\"";
 249                 else goto simple;
 250             break;
 251
 252             case '\'':
 253                 if (single)
 254                     str << "\\'";
 255                 else goto simple;
 256             break;
 257
 258             default:
 259                 // this test is designed to be "awewsome", generating neither warnings nor incorrect results
 260                 if (*value < 0x20 || *value >= 0x7f)
 261                     str << "\\x" << std::setbase(16) << std::setw(2) << std::setfill('0') << unsigned(uint8_t(*value));
 262                 else simple:
 263                     str << *value;
 264         }
 265
 266     str << (single ? '\'' : '"');
 267 }
 268
 269 void CYNumerify(std::ostringstream &str, double value) {
 270     char string[32];
 271     // XXX: I want this to print 1e3 rather than 1000
 272     sprintf(string, "%.17g", value);
 273     str << string;
 274 }
 275
 276 bool CYIsKey(CYUTF8String value) {
 277     const char *data(value.data);
 278     size_t size(value.size);
 279
 280     if (size == 0)
 281         return false;
 282
 283     if (DigitRange_[data[0]]) {
 284         size_t index(CYGetIndex(value));
 285         if (index == _not(size_t))
 286             return false;
 287     } else {
 288         if (!WordStartRange_[data[0]])
 289             return false;
 290         for (size_t i(1); i != size; ++i)
 291             if (!WordEndRange_[data[i]])
 292                 return false;
 293     }
 294
 295     return true;
 296 }
 297 /* }}} */
 298
 299 static JSGlobalContextRef Context_;
 300 static JSObjectRef System_;
 301
 302 static JSClassRef Functor_;
 303 static JSClassRef Global_;
 304 static JSClassRef Pointer_;
 305 static JSClassRef Runtime_;
 306 static JSClassRef Struct_;
 307
 308 static JSStringRef Result_;
 309
 310 JSObjectRef Array_;
 311 JSObjectRef Error_;
 312 JSObjectRef Function_;
 313 JSObjectRef String_;
 314
 315 JSStringRef length_;
 316 JSStringRef message_;
 317 JSStringRef name_;
 318 JSStringRef prototype_;
 319 JSStringRef toCYON_;
 320 JSStringRef toJSON_;
 321
 322 JSObjectRef Object_prototype_;
 323 JSObjectRef Function_prototype_;
 324
 325 JSObjectRef Array_prototype_;
 326 JSObjectRef Array_pop_;
 327 JSObjectRef Array_push_;
 328 JSObjectRef Array_splice_;
 329
 330 sqlite3 *Bridge_;
 331
 332 void CYFinalize(JSObjectRef object) {
 333     delete reinterpret_cast<CYData *>(JSObjectGetPrivate(object));
 334 }
 335
 336 struct CStringMapLess :
 337     std::binary_function<const char *, const char *, bool>
 338 {
 339     _finline bool operator ()(const char *lhs, const char *rhs) const {
 340         return strcmp(lhs, rhs) < 0;
 341     }
 342 };
 343
 344 void Structor_(apr_pool_t *pool, sig::Type *&type) {
 345     if (
 346         type->primitive == sig::pointer_P &&
 347         type->data.data.type != NULL &&
 348         type->data.data.type->primitive == sig::struct_P &&
 349         strcmp(type->data.data.type->name, "_objc_class") == 0
 350     ) {
 351         type->primitive = sig::typename_P;
 352         type->data.data.type = NULL;
 353         return;
 354     }
 355
 356     if (type->primitive != sig::struct_P || type->name == NULL)
 357         return;
 358
 359     sqlite3_stmt *statement;
 360
 361     _sqlcall(sqlite3_prepare(Bridge_,
 362         "select "
 363             "\"bridge\".\"mode\", "
 364             "\"bridge\".\"value\" "
 365         "from \"bridge\" "
 366         "where"
 367             " \"bridge\".\"mode\" in (3, 4) and"
 368             " \"bridge\".\"name\" = ?"
 369         " limit 1"
 370     , -1, &statement, NULL));
 371
 372     _sqlcall(sqlite3_bind_text(statement, 1, type->name, -1, SQLITE_STATIC));
 373
 374     int mode;
 375     const char *value;
 376
 377     if (_sqlcall(sqlite3_step(statement)) == SQLITE_DONE) {
 378         mode = -1;
 379         value = NULL;
 380     } else {
 381         mode = sqlite3_column_int(statement, 0);
 382         value = sqlite3_column_pooled(pool, statement, 1);
 383     }
 384
 385     _sqlcall(sqlite3_finalize(statement));
 386
 387     switch (mode) {
 388         default:
 389             _assert(false);
 390         case -1:
 391             break;
 392
 393         case 3: {
 394             sig::Parse(pool, &type->data.signature, value, &Structor_);
 395         } break;
 396
 397         case 4: {
 398             sig::Signature signature;
 399             sig::Parse(pool, &signature, value, &Structor_);
 400             type = signature.elements[0].type;
 401         } break;
 402     }
 403 }
 404
 405 JSClassRef Type_privateData::Class_;
 406
 407 struct Pointer :
 408     CYOwned
 409 {
 410     Type_privateData *type_;
 411     size_t length_;
 412
 413     Pointer(void *value, JSContextRef context, JSObjectRef owner, size_t length, sig::Type *type) :
 414         CYOwned(value, context, owner),
 415         type_(new(pool_) Type_privateData(type)),
 416         length_(length)
 417     {
 418     }
 419 };
 420
 421 struct Struct_privateData :
 422     CYOwned
 423 {
 424     Type_privateData *type_;
 425
 426     Struct_privateData(JSContextRef context, JSObjectRef owner) :
 427         CYOwned(NULL, context, owner)
 428     {
 429     }
 430 };
 431
 432 typedef std::map<const char *, Type_privateData *, CStringMapLess> TypeMap;
 433 static TypeMap Types_;
 434
 435 JSObjectRef CYMakeStruct(JSContextRef context, void *data, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 436     Struct_privateData *internal(new Struct_privateData(context, owner));
 437     apr_pool_t *pool(internal->pool_);
 438     Type_privateData *typical(new(pool) Type_privateData(type, ffi));
 439     internal->type_ = typical;
 440
 441     if (owner != NULL)
 442         internal->value_ = data;
 443     else {
 444         size_t size(typical->GetFFI()->size);
 445         void *copy(apr_palloc(internal->pool_, size));
 446         memcpy(copy, data, size);
 447         internal->value_ = copy;
 448     }
 449
 450     return JSObjectMake(context, Struct_, internal);
 451 }
 452
 453 JSValueRef CYCastJSValue(JSContextRef context, bool value) {
 454     return JSValueMakeBoolean(context, value);
 455 }
 456
 457 JSValueRef CYCastJSValue(JSContextRef context, double value) {
 458     return JSValueMakeNumber(context, value);
 459 }
 460
 461 #define CYCastJSValue_(Type_) \
 462     JSValueRef CYCastJSValue(JSContextRef context, Type_ value) { \
 463         return JSValueMakeNumber(context, static_cast<double>(value)); \
 464     }
 465
 466 CYCastJSValue_(int)
 467 CYCastJSValue_(unsigned int)
 468 CYCastJSValue_(long int)
 469 CYCastJSValue_(long unsigned int)
 470 CYCastJSValue_(long long int)
 471 CYCastJSValue_(long long unsigned int)
 472
 473 JSValueRef CYJSUndefined(JSContextRef context) {
 474     return JSValueMakeUndefined(context);
 475 }
 476
 477 double CYCastDouble(const char *value, size_t size) {
 478     char *end;
 479     double number(strtod(value, &end));
 480     if (end != value + size)
 481         return NAN;
 482     return number;
 483 }
 484
 485 double CYCastDouble(const char *value) {
 486     return CYCastDouble(value, strlen(value));
 487 }
 488
 489 double CYCastDouble(JSContextRef context, JSValueRef value) {
 490     JSValueRef exception(NULL);
 491     double number(JSValueToNumber(context, value, &exception));
 492     CYThrow(context, exception);
 493     return number;
 494 }
 495
 496 bool CYCastBool(JSContextRef context, JSValueRef value) {
 497     return JSValueToBoolean(context, value);
 498 }
 499
 500 JSValueRef CYJSNull(JSContextRef context) {
 501     return JSValueMakeNull(context);
 502 }
 503
 504 JSValueRef CYCastJSValue(JSContextRef context, JSStringRef value) {
 505     return value == NULL ? CYJSNull(context) : JSValueMakeString(context, value);
 506 }
 507
 508 JSValueRef CYCastJSValue(JSContextRef context, const char *value) {
 509     return CYCastJSValue(context, CYJSString(value));
 510 }
 511
 512 JSObjectRef CYCastJSObject(JSContextRef context, JSValueRef value) {
 513     JSValueRef exception(NULL);
 514     JSObjectRef object(JSValueToObject(context, value, &exception));
 515     CYThrow(context, exception);
 516     return object;
 517 }
 518
 519 JSValueRef CYCallAsFunction(JSContextRef context, JSObjectRef function, JSObjectRef _this, size_t count, JSValueRef arguments[]) {
 520     JSValueRef exception(NULL);
 521     JSValueRef value(JSObjectCallAsFunction(context, function, _this, count, arguments, &exception));
 522     CYThrow(context, exception);
 523     return value;
 524 }
 525
 526 bool CYIsCallable(JSContextRef context, JSValueRef value) {
 527     return value != NULL && JSValueIsObject(context, value) && JSObjectIsFunction(context, (JSObjectRef) value);
 528 }
 529
 530 static JSValueRef System_print(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 531     if (count == 0)
 532         printf("\n");
 533     else {
 534         CYPool pool;
 535         printf("%s\n", CYPoolCString(pool, context, arguments[0]));
 536     }
 537
 538     return CYJSUndefined(context);
 539 } CYCatch }
 540
 541 static size_t Nonce_(0);
 542
 543 static JSValueRef $cyq(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 544     CYPool pool;
 545     const char *name(apr_psprintf(pool, "%s%"APR_SIZE_T_FMT"", CYPoolCString(pool, context, arguments[0]), Nonce_++));
 546     return CYCastJSValue(context, name);
 547 }
 548
 549 static JSValueRef Cycript_gc_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 550     JSGarbageCollect(context);
 551     return CYJSUndefined(context);
 552 }
 553
 554 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSValueRef value, JSValueRef *exception) { CYTry {
 555     switch (JSType type = JSValueGetType(context, value)) {
 556         case kJSTypeUndefined:
 557             return "undefined";
 558         case kJSTypeNull:
 559             return "null";
 560         case kJSTypeBoolean:
 561             return CYCastBool(context, value) ? "true" : "false";
 562
 563         case kJSTypeNumber: {
 564             std::ostringstream str;
 565             CYNumerify(str, CYCastDouble(context, value));
 566             std::string value(str.str());
 567             return apr_pstrmemdup(pool, value.c_str(), value.size());
 568         } break;
 569
 570         case kJSTypeString: {
 571             std::ostringstream str;
 572             CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, value)));
 573             CYStringify(str, string.data, string.size);
 574             std::string value(str.str());
 575             return apr_pstrmemdup(pool, value.c_str(), value.size());
 576         } break;
 577
 578         case kJSTypeObject:
 579             return CYPoolCCYON(pool, context, (JSObjectRef) value);
 580         default:
 581             throw CYJSError(context, "JSValueGetType() == 0x%x", type);
 582     }
 583 } CYCatch }
 584
 585 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSValueRef value) {
 586     JSValueRef exception(NULL);
 587     const char *cyon(CYPoolCCYON(pool, context, value, &exception));
 588     CYThrow(context, exception);
 589     return cyon;
 590 }
 591
 592 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSObjectRef object) {
 593     JSValueRef toCYON(CYGetProperty(context, object, toCYON_));
 594     if (CYIsCallable(context, toCYON)) {
 595         JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toCYON, object, 0, NULL));
 596         return CYPoolCString(pool, context, value);
 597     }
 598
 599     JSValueRef toJSON(CYGetProperty(context, object, toJSON_));
 600     if (CYIsCallable(context, toJSON)) {
 601         JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 602         JSValueRef exception(NULL);
 603         const char *cyon(CYPoolCCYON(pool, context, CYCallAsFunction(context, (JSObjectRef) toJSON, object, 1, arguments), &exception));
 604         CYThrow(context, exception);
 605         return cyon;
 606     }
 607
 608     std::ostringstream str;
 609
 610     str << '{';
 611
 612     // XXX: this is, sadly, going to leak
 613     JSPropertyNameArrayRef names(JSObjectCopyPropertyNames(context, object));
 614
 615     bool comma(false);
 616
 617     for (size_t index(0), count(JSPropertyNameArrayGetCount(names)); index != count; ++index) {
 618         JSStringRef name(JSPropertyNameArrayGetNameAtIndex(names, index));
 619         JSValueRef value(CYGetProperty(context, object, name));
 620
 621         if (comma)
 622             str << ',';
 623         else
 624             comma = true;
 625
 626         CYUTF8String string(CYPoolUTF8String(pool, context, name));
 627         if (CYIsKey(string))
 628             str << string.data;
 629         else
 630             CYStringify(str, string.data, string.size);
 631
 632         str << ':' << CYPoolCCYON(pool, context, value);
 633     }
 634
 635     str << '}';
 636
 637     JSPropertyNameArrayRelease(names);
 638
 639     std::string string(str.str());
 640     return apr_pstrmemdup(pool, string.c_str(), string.size());
 641 }
 642
 643 static JSValueRef Array_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 644     CYPool pool;
 645     std::ostringstream str;
 646
 647     str << '[';
 648
 649     JSValueRef length(CYGetProperty(context, _this, length_));
 650     bool comma(false);
 651
 652     for (size_t index(0), count(CYCastDouble(context, length)); index != count; ++index) {
 653         JSValueRef value(CYGetProperty(context, _this, index));
 654
 655         if (comma)
 656             str << ',';
 657         else
 658             comma = true;
 659
 660         if (!JSValueIsUndefined(context, value))
 661             str << CYPoolCCYON(pool, context, value);
 662         else {
 663             str << ',';
 664             comma = false;
 665         }
 666     }
 667
 668     str << ']';
 669
 670     std::string value(str.str());
 671     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 672 } CYCatch }
 673
 674 JSObjectRef CYMakePointer(JSContextRef context, void *pointer, size_t length, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 675     Pointer *internal(new Pointer(pointer, context, owner, length, type));
 676     return JSObjectMake(context, Pointer_, internal);
 677 }
 678
 679 static JSObjectRef CYMakeFunctor(JSContextRef context, void (*function)(), const char *type) {
 680     cy::Functor *internal(new cy::Functor(type, function));
 681     return JSObjectMake(context, Functor_, internal);
 682 }
 683
 684 static bool CYGetOffset(apr_pool_t *pool, JSContextRef context, JSStringRef value, ssize_t &index) {
 685     return CYGetOffset(CYPoolCString(pool, context, value), index);
 686 }
 687
 688 void *CYCastPointer_(JSContextRef context, JSValueRef value) {
 689     switch (JSValueGetType(context, value)) {
 690         case kJSTypeNull:
 691             return NULL;
 692         /*case kJSTypeObject:
 693             if (JSValueIsObjectOfClass(context, value, Pointer_)) {
 694                 Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate((JSObjectRef) value)));
 695                 return internal->value_;
 696             }*/
 697         default:
 698             double number(CYCastDouble(context, value));
 699             if (std::isnan(number))
 700                 throw CYJSError(context, "cannot convert value to pointer");
 701             return reinterpret_cast<void *>(static_cast<uintptr_t>(static_cast<long long>(number)));
 702     }
 703 }
 704
 705 void CYPoolFFI(apr_pool_t *pool, JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, JSValueRef value) {
 706     switch (type->primitive) {
 707         case sig::boolean_P:
 708             *reinterpret_cast<bool *>(data) = JSValueToBoolean(context, value);
 709         break;
 710
 711 #define CYPoolFFI_(primitive, native) \
 712         case sig::primitive ## _P: \
 713             *reinterpret_cast<native *>(data) = CYCastDouble(context, value); \
 714         break;
 715
 716         CYPoolFFI_(uchar, unsigned char)
 717         CYPoolFFI_(char, char)
 718         CYPoolFFI_(ushort, unsigned short)
 719         CYPoolFFI_(short, short)
 720         CYPoolFFI_(ulong, unsigned long)
 721         CYPoolFFI_(long, long)
 722         CYPoolFFI_(uint, unsigned int)
 723         CYPoolFFI_(int, int)
 724         CYPoolFFI_(ulonglong, unsigned long long)
 725         CYPoolFFI_(longlong, long long)
 726         CYPoolFFI_(float, float)
 727         CYPoolFFI_(double, double)
 728
 729         case sig::array_P: {
 730             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 731             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 732             for (size_t index(0); index != type->data.data.size; ++index) {
 733                 ffi_type *field(ffi->elements[index]);
 734
 735                 JSValueRef rhs;
 736                 if (aggregate == NULL)
 737                     rhs = value;
 738                 else {
 739                     rhs = CYGetProperty(context, aggregate, index);
 740                     if (JSValueIsUndefined(context, rhs))
 741                         throw CYJSError(context, "unable to extract array value");
 742                 }
 743
 744                 CYPoolFFI(pool, context, type->data.data.type, field, base, rhs);
 745                 // XXX: alignment?
 746                 base += field->size;
 747             }
 748         } break;
 749
 750         case sig::pointer_P:
 751             *reinterpret_cast<void **>(data) = CYCastPointer<void *>(context, value);
 752         break;
 753
 754         case sig::string_P:
 755             *reinterpret_cast<const char **>(data) = CYPoolCString(pool, context, value);
 756         break;
 757
 758         case sig::struct_P: {
 759             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 760             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 761             for (size_t index(0); index != type->data.signature.count; ++index) {
 762                 sig::Element *element(&type->data.signature.elements[index]);
 763                 ffi_type *field(ffi->elements[index]);
 764
 765                 JSValueRef rhs;
 766                 if (aggregate == NULL)
 767                     rhs = value;
 768                 else {
 769                     rhs = CYGetProperty(context, aggregate, index);
 770                     if (JSValueIsUndefined(context, rhs)) {
 771                         if (element->name != NULL)
 772                             rhs = CYGetProperty(context, aggregate, CYJSString(element->name));
 773                         else
 774                             goto undefined;
 775                         if (JSValueIsUndefined(context, rhs)) undefined:
 776                             throw CYJSError(context, "unable to extract structure value");
 777                     }
 778                 }
 779
 780                 CYPoolFFI(pool, context, element->type, field, base, rhs);
 781                 // XXX: alignment?
 782                 base += field->size;
 783             }
 784         } break;
 785
 786         case sig::void_P:
 787         break;
 788
 789         default:
 790             if (hooks_ != NULL && hooks_->PoolFFI != NULL)
 791                 if ((*hooks_->PoolFFI)(pool, context, type, ffi, data, value))
 792                     return;
 793
 794             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 795     }
 796 }
 797
 798 JSValueRef CYFromFFI(JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, bool initialize, JSObjectRef owner) {
 799     switch (type->primitive) {
 800         case sig::boolean_P:
 801             return CYCastJSValue(context, *reinterpret_cast<bool *>(data));
 802
 803 #define CYFromFFI_(primitive, native) \
 804         case sig::primitive ## _P: \
 805             return CYCastJSValue(context, *reinterpret_cast<native *>(data)); \
 806
 807         CYFromFFI_(uchar, unsigned char)
 808         CYFromFFI_(char, char)
 809         CYFromFFI_(ushort, unsigned short)
 810         CYFromFFI_(short, short)
 811         CYFromFFI_(ulong, unsigned long)
 812         CYFromFFI_(long, long)
 813         CYFromFFI_(uint, unsigned int)
 814         CYFromFFI_(int, int)
 815         CYFromFFI_(ulonglong, unsigned long long)
 816         CYFromFFI_(longlong, long long)
 817         CYFromFFI_(float, float)
 818         CYFromFFI_(double, double)
 819
 820         case sig::array_P:
 821             if (void *pointer = data)
 822                 return CYMakePointer(context, pointer, type->data.data.size, type->data.data.type, NULL, owner);
 823             else goto null;
 824
 825         case sig::pointer_P:
 826             if (void *pointer = *reinterpret_cast<void **>(data))
 827                 return CYMakePointer(context, pointer, _not(size_t), type->data.data.type, NULL, owner);
 828             else goto null;
 829
 830         case sig::string_P:
 831             if (char *utf8 = *reinterpret_cast<char **>(data))
 832                 return CYCastJSValue(context, utf8);
 833             else goto null;
 834
 835         case sig::struct_P:
 836             return CYMakeStruct(context, data, type, ffi, owner);
 837         case sig::void_P:
 838             return CYJSUndefined(context);
 839
 840         null:
 841             return CYJSNull(context);
 842         default:
 843             if (hooks_ != NULL && hooks_->FromFFI != NULL)
 844                 if (JSValueRef value = (*hooks_->FromFFI)(context, type, ffi, data, initialize, owner))
 845                     return value;
 846
 847             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 848     }
 849 }
 850
 851 static void FunctionClosure_(ffi_cif *cif, void *result, void **arguments, void *arg) {
 852     Closure_privateData *internal(reinterpret_cast<Closure_privateData *>(arg));
 853
 854     JSContextRef context(internal->context_);
 855
 856     size_t count(internal->cif_.nargs);
 857     JSValueRef values[count];
 858
 859     for (size_t index(0); index != count; ++index)
 860         values[index] = CYFromFFI(context, internal->signature_.elements[1 + index].type, internal->cif_.arg_types[index], arguments[index]);
 861
 862     JSValueRef value(CYCallAsFunction(context, internal->function_, NULL, count, values));
 863     CYPoolFFI(NULL, context, internal->signature_.elements[0].type, internal->cif_.rtype, result, value);
 864 }
 865
 866 Closure_privateData *CYMakeFunctor_(JSContextRef context, JSObjectRef function, const char *type, void (*callback)(ffi_cif *, void *, void **, void *)) {
 867     // XXX: in case of exceptions this will leak
 868     // XXX: in point of fact, this may /need/ to leak :(
 869     Closure_privateData *internal(new Closure_privateData(context, function, type));
 870
 871     ffi_closure *closure((ffi_closure *) _syscall(mmap(
 872         NULL, sizeof(ffi_closure),
 873         PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE,
 874         -1, 0
 875     )));
 876
 877     ffi_status status(ffi_prep_closure(closure, &internal->cif_, callback, internal));
 878     _assert(status == FFI_OK);
 879
 880     _syscall(mprotect(closure, sizeof(*closure), PROT_READ | PROT_EXEC));
 881
 882     internal->value_ = closure;
 883
 884     return internal;
 885 }
 886
 887 static JSObjectRef CYMakeFunctor(JSContextRef context, JSObjectRef function, const char *type) {
 888     Closure_privateData *internal(CYMakeFunctor_(context, function, type, &FunctionClosure_));
 889     return JSObjectMake(context, Functor_, internal);
 890 }
 891
 892 static JSObjectRef CYMakeFunctor(JSContextRef context, JSValueRef value, const char *type) {
 893     JSValueRef exception(NULL);
 894     bool function(JSValueIsInstanceOfConstructor(context, value, Function_, &exception));
 895     CYThrow(context, exception);
 896
 897     if (function) {
 898         JSObjectRef function(CYCastJSObject(context, value));
 899         return CYMakeFunctor(context, function, type);
 900     } else {
 901         void (*function)()(CYCastPointer<void (*)()>(context, value));
 902         return CYMakeFunctor(context, function, type);
 903     }
 904 }
 905
 906 static bool Index_(apr_pool_t *pool, JSContextRef context, Struct_privateData *internal, JSStringRef property, ssize_t &index, uint8_t *&base) {
 907     Type_privateData *typical(internal->type_);
 908     sig::Type *type(typical->type_);
 909     if (type == NULL)
 910         return false;
 911
 912     const char *name(CYPoolCString(pool, context, property));
 913     size_t length(strlen(name));
 914     double number(CYCastDouble(name, length));
 915
 916     size_t count(type->data.signature.count);
 917
 918     if (std::isnan(number)) {
 919         if (property == NULL)
 920             return false;
 921
 922         sig::Element *elements(type->data.signature.elements);
 923
 924         for (size_t local(0); local != count; ++local) {
 925             sig::Element *element(&elements[local]);
 926             if (element->name != NULL && strcmp(name, element->name) == 0) {
 927                 index = local;
 928                 goto base;
 929             }
 930         }
 931
 932         return false;
 933     } else {
 934         index = static_cast<ssize_t>(number);
 935         if (index != number || index < 0 || static_cast<size_t>(index) >= count)
 936             return false;
 937     }
 938
 939   base:
 940     ffi_type **elements(typical->GetFFI()->elements);
 941
 942     base = reinterpret_cast<uint8_t *>(internal->value_);
 943     for (ssize_t local(0); local != index; ++local)
 944         base += elements[local]->size;
 945
 946     return true;
 947 }
 948
 949 static JSValueRef Pointer_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 950     CYPool pool;
 951     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 952
 953     if (JSStringIsEqual(property, length_))
 954         return internal->length_ == _not(size_t) ? CYJSUndefined(context) : CYCastJSValue(context, internal->length_);
 955
 956     Type_privateData *typical(internal->type_);
 957
 958     if (typical->type_ == NULL)
 959         return NULL;
 960
 961     ssize_t offset;
 962     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 963         offset = 0;
 964     else if (!CYGetOffset(pool, context, property, offset))
 965         return NULL;
 966
 967     ffi_type *ffi(typical->GetFFI());
 968
 969     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 970     base += ffi->size * offset;
 971
 972     JSObjectRef owner(internal->GetOwner() ?: object);
 973     return CYFromFFI(context, typical->type_, ffi, base, false, owner);
 974 } CYCatch }
 975
 976 static bool Pointer_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 977     CYPool pool;
 978     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 979     Type_privateData *typical(internal->type_);
 980
 981     if (typical->type_ == NULL)
 982         return NULL;
 983
 984     ssize_t offset;
 985     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 986         offset = 0;
 987     else if (!CYGetOffset(pool, context, property, offset))
 988         return NULL;
 989
 990     ffi_type *ffi(typical->GetFFI());
 991
 992     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 993     base += ffi->size * offset;
 994
 995     CYPoolFFI(NULL, context, typical->type_, ffi, base, value);
 996     return true;
 997 } CYCatch }
 998
 999 static JSValueRef Struct_callAsFunction_$cya(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1000     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(_this)));
1001     Type_privateData *typical(internal->type_);
1002     return CYMakePointer(context, internal->value_, _not(size_t), typical->type_, typical->ffi_, _this);
1003 }
1004
1005 static JSValueRef Struct_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1006     CYPool pool;
1007     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
1008     Type_privateData *typical(internal->type_);
1009
1010     ssize_t index;
1011     uint8_t *base;
1012
1013     if (!Index_(pool, context, internal, property, index, base))
1014         return NULL;
1015
1016     JSObjectRef owner(internal->GetOwner() ?: object);
1017
1018     return CYFromFFI(context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, false, owner);
1019 } CYCatch }
1020
1021 static bool Struct_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
1022     CYPool pool;
1023     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
1024     Type_privateData *typical(internal->type_);
1025
1026     ssize_t index;
1027     uint8_t *base;
1028
1029     if (!Index_(pool, context, internal, property, index, base))
1030         return false;
1031
1032     CYPoolFFI(NULL, context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, value);
1033     return true;
1034 } CYCatch }
1035
1036 static void Struct_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
1037     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
1038     Type_privateData *typical(internal->type_);
1039     sig::Type *type(typical->type_);
1040
1041     if (type == NULL)
1042         return;
1043
1044     size_t count(type->data.signature.count);
1045     sig::Element *elements(type->data.signature.elements);
1046
1047     char number[32];
1048
1049     for (size_t index(0); index != count; ++index) {
1050         const char *name;
1051         name = elements[index].name;
1052
1053         if (name == NULL) {
1054             sprintf(number, "%zu", index);
1055             name = number;
1056         }
1057
1058         JSPropertyNameAccumulatorAddName(names, CYJSString(name));
1059     }
1060 }
1061
1062 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 {
1063     if (setups + count != signature->count - 1)
1064         throw CYJSError(context, "incorrect number of arguments to ffi function");
1065
1066     size_t size(setups + count);
1067     void *values[size];
1068     memcpy(values, setup, sizeof(void *) * setups);
1069
1070     for (size_t index(setups); index != size; ++index) {
1071         sig::Element *element(&signature->elements[index + 1]);
1072         ffi_type *ffi(cif->arg_types[index]);
1073         // XXX: alignment?
1074         values[index] = new(pool) uint8_t[ffi->size];
1075         CYPoolFFI(pool, context, element->type, ffi, values[index], arguments[index - setups]);
1076     }
1077
1078     uint8_t value[cif->rtype->size];
1079
1080     if (hooks_ != NULL && hooks_->CallFunction != NULL)
1081         (*hooks_->CallFunction)(context, cif, function, value, values);
1082     else
1083         ffi_call(cif, function, value, values);
1084
1085     return CYFromFFI(context, signature->elements[0].type, cif->rtype, value, initialize);
1086 } CYCatch }
1087
1088 static JSValueRef Functor_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1089     CYPool pool;
1090     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
1091     return CYCallFunction(pool, context, 0, NULL, count, arguments, false, exception, &internal->signature_, &internal->cif_, internal->GetValue());
1092 }
1093
1094 static JSObjectRef CYMakeType(JSContextRef context, const char *type) {
1095     Type_privateData *internal(new Type_privateData(type));
1096     return JSObjectMake(context, Type_privateData::Class_, internal);
1097 }
1098
1099 static JSObjectRef CYMakeType(JSContextRef context, sig::Type *type) {
1100     Type_privateData *internal(new Type_privateData(type));
1101     return JSObjectMake(context, Type_privateData::Class_, internal);
1102 }
1103
1104 static void *CYCastSymbol(const char *name) {
1105     return dlsym(RTLD_DEFAULT, name);
1106 }
1107
1108 static JSValueRef Runtime_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1109     CYPool pool;
1110     CYUTF8String name(CYPoolUTF8String(pool, context, property));
1111
1112     if (hooks_ != NULL && hooks_->RuntimeProperty != NULL)
1113         if (JSValueRef value = (*hooks_->RuntimeProperty)(context, name))
1114             return value;
1115
1116     sqlite3_stmt *statement;
1117
1118     _sqlcall(sqlite3_prepare(Bridge_,
1119         "select "
1120             "\"bridge\".\"mode\", "
1121             "\"bridge\".\"value\" "
1122         "from \"bridge\" "
1123         "where"
1124             " \"bridge\".\"name\" = ?"
1125         " limit 1"
1126     , -1, &statement, NULL));
1127
1128     _sqlcall(sqlite3_bind_text(statement, 1, name.data, name.size, SQLITE_STATIC));
1129
1130     int mode;
1131     const char *value;
1132
1133     if (_sqlcall(sqlite3_step(statement)) == SQLITE_DONE) {
1134         mode = -1;
1135         value = NULL;
1136     } else {
1137         mode = sqlite3_column_int(statement, 0);
1138         value = sqlite3_column_pooled(pool, statement, 1);
1139     }
1140
1141     _sqlcall(sqlite3_finalize(statement));
1142
1143     switch (mode) {
1144         default:
1145             _assert(false);
1146         case -1:
1147             return NULL;
1148
1149         case 0:
1150             return JSEvaluateScript(CYGetJSContext(context), CYJSString(value), NULL, NULL, 0, NULL);
1151
1152         case 1:
1153             if (void (*symbol)() = reinterpret_cast<void (*)()>(CYCastSymbol(name.data)))
1154                 return CYMakeFunctor(context, symbol, value);
1155             else return NULL;
1156
1157         case 2:
1158             if (void *symbol = CYCastSymbol(name.data)) {
1159                 // XXX: this is horrendously inefficient
1160                 sig::Signature signature;
1161                 sig::Parse(pool, &signature, value, &Structor_);
1162                 ffi_cif cif;
1163                 sig::sig_ffi_cif(pool, &sig::ObjectiveC, &signature, &cif);
1164                 return CYFromFFI(context, signature.elements[0].type, cif.rtype, symbol);
1165             } else return NULL;
1166
1167         // XXX: implement case 3
1168         case 4:
1169             return CYMakeType(context, value);
1170     }
1171 } CYCatch }
1172
1173 static JSObjectRef Pointer_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1174     if (count != 2)
1175         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1176
1177     CYPool pool;
1178
1179     void *value(CYCastPointer<void *>(context, arguments[0]));
1180     const char *type(CYPoolCString(pool, context, arguments[1]));
1181
1182     sig::Signature signature;
1183     sig::Parse(pool, &signature, type, &Structor_);
1184
1185     return CYMakePointer(context, value, _not(size_t), signature.elements[0].type, NULL, NULL);
1186 } CYCatch }
1187
1188 static JSObjectRef Type_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1189     if (count != 1)
1190         throw CYJSError(context, "incorrect number of arguments to Type constructor");
1191     CYPool pool;
1192     const char *type(CYPoolCString(pool, context, arguments[0]));
1193     return CYMakeType(context, type);
1194 } CYCatch }
1195
1196 static JSValueRef Type_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1197     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1198
1199     sig::Type type;
1200
1201     if (JSStringIsEqualToUTF8CString(property, "$cyi")) {
1202         type.primitive = sig::pointer_P;
1203         type.data.data.size = 0;
1204     } else {
1205         CYPool pool;
1206         size_t index(CYGetIndex(pool, context, property));
1207         if (index == _not(size_t))
1208             return NULL;
1209         type.primitive = sig::array_P;
1210         type.data.data.size = index;
1211     }
1212
1213     type.name = NULL;
1214     type.flags = 0;
1215
1216     type.data.data.type = internal->type_;
1217
1218     return CYMakeType(context, &type);
1219 } CYCatch }
1220
1221 static JSValueRef Type_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1222     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1223
1224     if (count != 1)
1225         throw CYJSError(context, "incorrect number of arguments to type cast function");
1226     sig::Type *type(internal->type_);
1227     ffi_type *ffi(internal->GetFFI());
1228     // XXX: alignment?
1229     uint8_t value[ffi->size];
1230     CYPool pool;
1231     CYPoolFFI(pool, context, type, ffi, value, arguments[0]);
1232     return CYFromFFI(context, type, ffi, value);
1233 } CYCatch }
1234
1235 static JSObjectRef Type_callAsConstructor(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1236     if (count != 0)
1237         throw CYJSError(context, "incorrect number of arguments to type cast function");
1238     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1239
1240     sig::Type *type(internal->type_);
1241     size_t length;
1242
1243     if (type->primitive != sig::array_P)
1244         length = _not(size_t);
1245     else {
1246         length = type->data.data.size;
1247         type = type->data.data.type;
1248     }
1249
1250     void *value(malloc(internal->GetFFI()->size));
1251     return CYMakePointer(context, value, length, type, NULL, NULL);
1252 } CYCatch }
1253
1254 static JSObjectRef Functor_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1255     if (count != 2)
1256         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1257     CYPool pool;
1258     const char *type(CYPoolCString(pool, context, arguments[1]));
1259     return CYMakeFunctor(context, arguments[0], type);
1260 } CYCatch }
1261
1262 static JSValueRef CYValue_callAsFunction_valueOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1263     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1264     return CYCastJSValue(context, reinterpret_cast<uintptr_t>(internal->value_));
1265 } CYCatch }
1266
1267 static JSValueRef CYValue_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1268     return CYValue_callAsFunction_valueOf(context, object, _this, count, arguments, exception);
1269 }
1270
1271 static JSValueRef CYValue_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1272     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1273     char string[32];
1274     sprintf(string, "%p", internal->value_);
1275     return CYCastJSValue(context, string);
1276 } CYCatch }
1277
1278 static JSValueRef Pointer_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1279     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(_this)));
1280     if (internal->length_ != _not(size_t))
1281         // XXX: maybe dynamically look up Array.toCYON?
1282         return Array_callAsFunction_toCYON(context, object, _this, count, arguments, exception);
1283     else {
1284         char string[32];
1285         sprintf(string, "%p", internal->value_);
1286         return CYCastJSValue(context, string);
1287     }
1288 } CYCatch }
1289
1290 static JSValueRef Type_callAsFunction_toString(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1291     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1292     CYPool pool;
1293     const char *type(sig::Unparse(pool, internal->type_));
1294     return CYCastJSValue(context, CYJSString(type));
1295 } CYCatch }
1296
1297 static JSValueRef Type_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1298     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1299     CYPool pool;
1300     const char *type(sig::Unparse(pool, internal->type_));
1301     size_t size(strlen(type));
1302     char *cyon(new(pool) char[12 + size + 1]);
1303     memcpy(cyon, "new Type(\"", 10);
1304     cyon[12 + size] = '\0';
1305     cyon[12 + size - 2] = '"';
1306     cyon[12 + size - 1] = ')';
1307     memcpy(cyon + 10, type, size);
1308     return CYCastJSValue(context, CYJSString(cyon));
1309 } CYCatch }
1310
1311 static JSValueRef Type_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1312     return Type_callAsFunction_toString(context, object, _this, count, arguments, exception);
1313 }
1314
1315 static JSStaticFunction Pointer_staticFunctions[4] = {
1316     {"toCYON", &Pointer_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1317     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1318     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1319     {NULL, NULL, 0}
1320 };
1321
1322 static JSStaticFunction Struct_staticFunctions[2] = {
1323     {"$cya", &Struct_callAsFunction_$cya, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1324     {NULL, NULL, 0}
1325 };
1326
1327 static JSStaticFunction Functor_staticFunctions[4] = {
1328     {"toCYON", &CYValue_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1329     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1330     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1331     {NULL, NULL, 0}
1332 };
1333
1334 namespace cy {
1335     JSStaticFunction const * const Functor::StaticFunctions = Functor_staticFunctions;
1336 }
1337
1338 static JSStaticFunction Type_staticFunctions[4] = {
1339     {"toCYON", &Type_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1340     {"toJSON", &Type_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1341     {"toString", &Type_callAsFunction_toString, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1342     {NULL, NULL, 0}
1343 };
1344
1345 static JSObjectRef (*JSObjectMakeArray$)(JSContextRef, size_t, const JSValueRef[], JSValueRef *);
1346
1347 void CYSetArgs(int argc, const char *argv[]) {
1348     JSContextRef context(CYGetJSContext());
1349     JSValueRef args[argc];
1350     for (int i(0); i != argc; ++i)
1351         args[i] = CYCastJSValue(context, argv[i]);
1352
1353     JSObjectRef array;
1354     if (JSObjectMakeArray$ != NULL) {
1355         JSValueRef exception(NULL);
1356         array = (*JSObjectMakeArray$)(context, argc, args, &exception);
1357         CYThrow(context, exception);
1358     } else {
1359         JSValueRef value(CYCallAsFunction(context, Array_, NULL, argc, args));
1360         array = CYCastJSObject(context, value);
1361     }
1362
1363     CYSetProperty(context, System_, CYJSString("args"), array);
1364 }
1365
1366 JSObjectRef CYGetGlobalObject(JSContextRef context) {
1367     return JSContextGetGlobalObject(context);
1368 }
1369
1370 const char *CYExecute(apr_pool_t *pool, const char *code) {
1371     JSContextRef context(CYGetJSContext());
1372     JSValueRef exception(NULL), result;
1373
1374     void *handle;
1375     if (hooks_ != NULL && hooks_->ExecuteStart != NULL)
1376         handle = (*hooks_->ExecuteStart)(context);
1377     else
1378         handle = NULL;
1379
1380     const char *json;
1381
1382     try {
1383         result = JSEvaluateScript(context, CYJSString(code), NULL, NULL, 0, &exception);
1384     } catch (const char *error) {
1385         return error;
1386     }
1387
1388     if (exception != NULL) { error:
1389         result = exception;
1390         exception = NULL;
1391     }
1392
1393     if (JSValueIsUndefined(context, result))
1394         return NULL;
1395
1396     try {
1397         json = CYPoolCCYON(pool, context, result, &exception);
1398     } catch (const char *error) {
1399         return error;
1400     }
1401
1402     if (exception != NULL)
1403         goto error;
1404
1405     CYSetProperty(context, CYGetGlobalObject(context), Result_, result);
1406
1407     if (hooks_ != NULL && hooks_->ExecuteEnd != NULL)
1408         (*hooks_->ExecuteEnd)(context, handle);
1409     return json;
1410 }
1411
1412 static apr_pool_t *Pool_;
1413
1414 static bool initialized_;
1415
1416 void CYInitialize() {
1417     if (!initialized_)
1418         initialized_ = true;
1419     else return;
1420
1421     _aprcall(apr_initialize());
1422     _aprcall(apr_pool_create(&Pool_, NULL));
1423     _sqlcall(sqlite3_open("/usr/lib/libcycript.db", &Bridge_));
1424
1425     JSObjectMakeArray$ = reinterpret_cast<JSObjectRef (*)(JSContextRef, size_t, const JSValueRef[], JSValueRef *)>(dlsym(RTLD_DEFAULT, "JSObjectMakeArray"));
1426
1427     JSClassDefinition definition;
1428
1429     definition = kJSClassDefinitionEmpty;
1430     definition.className = "Functor";
1431     definition.staticFunctions = cy::Functor::StaticFunctions;
1432     definition.callAsFunction = &Functor_callAsFunction;
1433     definition.finalize = &CYFinalize;
1434     Functor_ = JSClassCreate(&definition);
1435
1436     definition = kJSClassDefinitionEmpty;
1437     definition.className = "Pointer";
1438     definition.staticFunctions = Pointer_staticFunctions;
1439     definition.getProperty = &Pointer_getProperty;
1440     definition.setProperty = &Pointer_setProperty;
1441     definition.finalize = &CYFinalize;
1442     Pointer_ = JSClassCreate(&definition);
1443
1444     definition = kJSClassDefinitionEmpty;
1445     definition.className = "Struct";
1446     definition.staticFunctions = Struct_staticFunctions;
1447     definition.getProperty = &Struct_getProperty;
1448     definition.setProperty = &Struct_setProperty;
1449     definition.getPropertyNames = &Struct_getPropertyNames;
1450     definition.finalize = &CYFinalize;
1451     Struct_ = JSClassCreate(&definition);
1452
1453     definition = kJSClassDefinitionEmpty;
1454     definition.className = "Type";
1455     definition.staticFunctions = Type_staticFunctions;
1456     definition.getProperty = &Type_getProperty;
1457     definition.callAsFunction = &Type_callAsFunction;
1458     definition.callAsConstructor = &Type_callAsConstructor;
1459     definition.finalize = &CYFinalize;
1460     Type_privateData::Class_ = JSClassCreate(&definition);
1461
1462     definition = kJSClassDefinitionEmpty;
1463     definition.className = "Runtime";
1464     definition.getProperty = &Runtime_getProperty;
1465     Runtime_ = JSClassCreate(&definition);
1466
1467     definition = kJSClassDefinitionEmpty;
1468     //definition.getProperty = &Global_getProperty;
1469     Global_ = JSClassCreate(&definition);
1470
1471     length_ = JSStringCreateWithUTF8CString("length");
1472     message_ = JSStringCreateWithUTF8CString("message");
1473     name_ = JSStringCreateWithUTF8CString("name");
1474     prototype_ = JSStringCreateWithUTF8CString("prototype");
1475     toCYON_ = JSStringCreateWithUTF8CString("toCYON");
1476     toJSON_ = JSStringCreateWithUTF8CString("toJSON");
1477
1478     Result_ = JSStringCreateWithUTF8CString("_");
1479
1480     if (hooks_ != NULL && hooks_->Initialize != NULL)
1481         (*hooks_->Initialize)();
1482 }
1483
1484 apr_pool_t *CYGetGlobalPool() {
1485     CYInitialize();
1486     return Pool_;
1487 }
1488
1489 void CYThrow(JSContextRef context, JSValueRef value) {
1490     if (value != NULL)
1491         throw CYJSError(context, value);
1492 }
1493
1494 const char *CYJSError::PoolCString(apr_pool_t *pool) const {
1495     return CYPoolCString(pool, context_, value_);
1496 }
1497
1498 JSValueRef CYJSError::CastJSValue(JSContextRef context) const {
1499     // XXX: what if the context is different?
1500     return value_;
1501 }
1502
1503 void CYThrow(const char *format, ...) {
1504     va_list args;
1505     va_start (args, format);
1506     throw CYPoolError(format, args);
1507     // XXX: does this matter? :(
1508     va_end (args);
1509 }
1510
1511 const char *CYPoolError::PoolCString(apr_pool_t *pool) const {
1512     return apr_pstrdup(pool, message_);
1513 }
1514
1515 CYPoolError::CYPoolError(const char *format, ...) {
1516     va_list args;
1517     va_start (args, format);
1518     message_ = apr_pvsprintf(pool_, format, args);
1519     va_end (args);
1520 }
1521
1522 CYPoolError::CYPoolError(const char *format, va_list args) {
1523     message_ = apr_pvsprintf(pool_, format, args);
1524 }
1525
1526 JSValueRef CYCastJSError(JSContextRef context, const char *message) {
1527     JSValueRef arguments[1] = {CYCastJSValue(context, message)};
1528
1529     JSValueRef exception(NULL);
1530     JSValueRef value(JSObjectCallAsConstructor(context, Error_, 1, arguments, &exception));
1531     CYThrow(context, exception);
1532
1533     return value;
1534 }
1535
1536 JSValueRef CYPoolError::CastJSValue(JSContextRef context) const {
1537     return CYCastJSError(context, message_);
1538 }
1539
1540 CYJSError::CYJSError(JSContextRef context, const char *format, ...) {
1541     _assert(context != NULL);
1542
1543     CYPool pool;
1544
1545     va_list args;
1546     va_start (args, format);
1547     const char *message(apr_pvsprintf(pool, format, args));
1548     va_end (args);
1549
1550     value_ = CYCastJSError(context, message);
1551 }
1552
1553 JSGlobalContextRef CYGetJSContext(JSContextRef context) {
1554     // XXX: do something better
1555     return Context_;
1556 }
1557
1558 void CYSetupContext(JSGlobalContextRef context) {
1559     JSObjectRef global(CYGetGlobalObject(context));
1560
1561     JSObjectSetPrototype(context, global, JSObjectMake(context, Runtime_, NULL));
1562
1563     Array_ = CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Array")));
1564     JSValueProtect(context, Array_);
1565
1566     Error_ = CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Error")));
1567     JSValueProtect(context, Error_);
1568
1569     Function_ = CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Function")));
1570     JSValueProtect(context, Function_);
1571
1572     String_ = CYCastJSObject(context, CYGetProperty(context, global, CYJSString("String")));
1573     JSValueProtect(context, String_);
1574
1575     JSObjectRef Object(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Object"))));
1576     Object_prototype_ = CYCastJSObject(context, CYGetProperty(context, Object, prototype_));
1577     JSValueProtect(context, Object_prototype_);
1578
1579     Array_prototype_ = CYCastJSObject(context, CYGetProperty(context, Array_, prototype_));
1580     Array_pop_ = CYCastJSObject(context, CYGetProperty(context, Array_prototype_, CYJSString("pop")));
1581     Array_push_ = CYCastJSObject(context, CYGetProperty(context, Array_prototype_, CYJSString("push")));
1582     Array_splice_ = CYCastJSObject(context, CYGetProperty(context, Array_prototype_, CYJSString("splice")));
1583
1584     CYSetProperty(context, Array_prototype_, toCYON_, JSObjectMakeFunctionWithCallback(context, toCYON_, &Array_callAsFunction_toCYON), kJSPropertyAttributeDontEnum);
1585
1586     JSValueProtect(context, Array_prototype_);
1587     JSValueProtect(context, Array_pop_);
1588     JSValueProtect(context, Array_push_);
1589     JSValueProtect(context, Array_splice_);
1590
1591     JSObjectRef Functor(JSObjectMakeConstructor(context, Functor_, &Functor_new));
1592
1593     Function_prototype_ = (JSObjectRef) CYGetProperty(context, Function_, prototype_);
1594     JSValueProtect(context, Function_prototype_);
1595
1596     JSObjectSetPrototype(context, (JSObjectRef) CYGetProperty(context, Functor, prototype_), Function_prototype_);
1597
1598     CYSetProperty(context, global, CYJSString("Functor"), Functor);
1599     CYSetProperty(context, global, CYJSString("Pointer"), JSObjectMakeConstructor(context, Pointer_, &Pointer_new));
1600     CYSetProperty(context, global, CYJSString("Type"), JSObjectMakeConstructor(context, Type_privateData::Class_, &Type_new));
1601
1602     JSObjectRef cycript(JSObjectMake(context, NULL, NULL));
1603     CYSetProperty(context, global, CYJSString("Cycript"), cycript);
1604     CYSetProperty(context, cycript, CYJSString("gc"), JSObjectMakeFunctionWithCallback(context, CYJSString("gc"), &Cycript_gc_callAsFunction));
1605
1606     CYSetProperty(context, global, CYJSString("$cyq"), JSObjectMakeFunctionWithCallback(context, CYJSString("$cyq"), &$cyq));
1607
1608     System_ = JSObjectMake(context, NULL, NULL);
1609     JSValueProtect(context, System_);
1610
1611     CYSetProperty(context, global, CYJSString("system"), System_);
1612     CYSetProperty(context, System_, CYJSString("args"), CYJSNull(context));
1613     //CYSetProperty(context, System_, CYJSString("global"), global);
1614
1615     CYSetProperty(context, System_, CYJSString("print"), JSObjectMakeFunctionWithCallback(context, CYJSString("print"), &System_print));
1616
1617     if (hooks_ != NULL && hooks_->SetupContext != NULL)
1618         (*hooks_->SetupContext)(context);
1619 }
1620
1621 JSGlobalContextRef CYGetJSContext() {
1622     CYInitialize();
1623
1624     if (Context_ == NULL) {
1625         Context_ = JSGlobalContextCreate(Global_);
1626         CYSetupContext(Context_);
1627     }
1628
1629     return Context_;
1630 }