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