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