Library.cpp

   1 /* Cycript - Inlining/Optimizing JavaScript Compiler
   2  * Copyright (C) 2009  Jay Freeman (saurik)
   3 */
   4
   5 /* Modified BSD License {{{ */
   6 /*
   7  *        Redistribution and use in source and binary
   8  * forms, with or without modification, are permitted
   9  * provided that the following conditions are met:
  10  *
  11  * 1. Redistributions of source code must retain the
  12  *    above copyright notice, this list of conditions
  13  *    and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the
  15  *    above copyright notice, this list of conditions
  16  *    and the following disclaimer in the documentation
  17  *    and/or other materials provided with the
  18  *    distribution.
  19  * 3. The name of the author may not be used to endorse
  20  *    or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS''
  24  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
  25  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  26  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
  28  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  29  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  30  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  31  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  34  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  35  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  36  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  37 */
  38 /* }}} */
  39
  40 #include <sqlite3.h>
  41
  42 #include "Internal.hpp"
  43
  44 #include <dlfcn.h>
  45 #include <iconv.h>
  46
  47 #include "cycript.hpp"
  48
  49 #include "sig/parse.hpp"
  50 #include "sig/ffi_type.hpp"
  51
  52 #include "Pooling.hpp"
  53
  54 #include <sys/mman.h>
  55
  56 #include <iostream>
  57 #include <ext/stdio_filebuf.h>
  58 #include <set>
  59 #include <map>
  60 #include <iomanip>
  61 #include <sstream>
  62 #include <cmath>
  63
  64 #include "Parser.hpp"
  65 #include "Cycript.tab.hh"
  66
  67 #include "Error.hpp"
  68 #include "JavaScript.hpp"
  69 #include "String.hpp"
  70
  71 #ifdef __OBJC__
  72 #define CYCatch_ \
  73     catch (NSException *error) { \
  74         CYThrow(context, error, exception); \
  75         return NULL; \
  76     }
  77 #else
  78 #define CYCatch_
  79 #endif
  80
  81 char *sqlite3_column_pooled(apr_pool_t *pool, sqlite3_stmt *stmt, int n) {
  82     if (const unsigned char *value = sqlite3_column_text(stmt, n))
  83         return apr_pstrdup(pool, (const char *) value);
  84     else return NULL;
  85 }
  86
  87 struct CYHooks *hooks_;
  88
  89 /* JavaScript Properties {{{ */
  90 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, size_t index) {
  91     JSValueRef exception(NULL);
  92     JSValueRef value(JSObjectGetPropertyAtIndex(context, object, index, &exception));
  93     CYThrow(context, exception);
  94     return value;
  95 }
  96
  97 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, JSStringRef name) {
  98     JSValueRef exception(NULL);
  99     JSValueRef value(JSObjectGetProperty(context, object, name, &exception));
 100     CYThrow(context, exception);
 101     return value;
 102 }
 103
 104 void CYSetProperty(JSContextRef context, JSObjectRef object, size_t index, JSValueRef value) {
 105     JSValueRef exception(NULL);
 106     JSObjectSetPropertyAtIndex(context, object, index, value, &exception);
 107     CYThrow(context, exception);
 108 }
 109
 110 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef value, JSPropertyAttributes attributes) {
 111     JSValueRef exception(NULL);
 112     JSObjectSetProperty(context, object, name, value, attributes, &exception);
 113     CYThrow(context, exception);
 114 }
 115
 116 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef (*callback)(JSContextRef, JSObjectRef, JSObjectRef, size_t, const JSValueRef[], JSValueRef *), JSPropertyAttributes attributes = kJSPropertyAttributeNone) {
 117     CYSetProperty(context, object, name, JSObjectMakeFunctionWithCallback(context, name, callback), attributes);
 118 }
 119 /* }}} */
 120 /* JavaScript Strings {{{ */
 121 JSStringRef CYCopyJSString(const char *value) {
 122     return value == NULL ? NULL : JSStringCreateWithUTF8CString(value);
 123 }
 124
 125 JSStringRef CYCopyJSString(JSStringRef value) {
 126     return value == NULL ? NULL : JSStringRetain(value);
 127 }
 128
 129 JSStringRef CYCopyJSString(CYUTF8String value) {
 130     // XXX: this is very wrong
 131     return CYCopyJSString(value.data);
 132 }
 133
 134 JSStringRef CYCopyJSString(JSContextRef context, JSValueRef value) {
 135     if (JSValueIsNull(context, value))
 136         return NULL;
 137     JSValueRef exception(NULL);
 138     JSStringRef string(JSValueToStringCopy(context, value, &exception));
 139     CYThrow(context, exception);
 140     return string;
 141 }
 142
 143 static CYUTF16String CYCastUTF16String(JSStringRef value) {
 144     return CYUTF16String(JSStringGetCharactersPtr(value), JSStringGetLength(value));
 145 }
 146
 147 template <typename Type_>
 148 _finline size_t iconv_(size_t (*iconv)(iconv_t, Type_, size_t *, char **, size_t *), iconv_t cd, char **inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft) {
 149     return iconv(cd, const_cast<Type_>(inbuf), inbytesleft, outbuf, outbytesleft);
 150 }
 151
 152 CYUTF8String CYPoolUTF8String(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 153     _assert(pool != NULL);
 154
 155     CYUTF16String utf16(CYCastUTF16String(value));
 156     const char *in(reinterpret_cast<const char *>(utf16.data));
 157
 158 #ifdef __GLIBC__
 159     iconv_t conversion(_syscall(iconv_open("UTF-8", "UCS-2")));
 160 #else
 161     iconv_t conversion(_syscall(iconv_open("UTF-8", "UCS-2-INTERNAL")));
 162 #endif
 163
 164     size_t size(JSStringGetMaximumUTF8CStringSize(value));
 165     char *out(new(pool) char[size]);
 166     CYUTF8String utf8(out, size);
 167
 168     size = utf16.size * 2;
 169     _syscall(iconv_(&iconv, conversion, const_cast<char **>(&in), &size, &out, &utf8.size));
 170
 171     *out = '\0';
 172     utf8.size = out - utf8.data;
 173
 174     _syscall(iconv_close(conversion));
 175
 176     return utf8;
 177 }
 178
 179 const char *CYPoolCString(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 180     CYUTF8String utf8(CYPoolUTF8String(pool, context, value));
 181     _assert(memchr(utf8.data, '\0', utf8.size) == NULL);
 182     return utf8.data;
 183 }
 184
 185 const char *CYPoolCString(apr_pool_t *pool, JSContextRef context, JSValueRef value) {
 186     return JSValueIsNull(context, value) ? NULL : CYPoolCString(pool, context, CYJSString(context, value));
 187 }
 188 /* }}} */
 189
 190 /* Index Offsets {{{ */
 191 size_t CYGetIndex(const CYUTF8String &value) {
 192     if (value.data[0] != '0') {
 193         size_t index(0);
 194         for (size_t i(0); i != value.size; ++i) {
 195             if (!DigitRange_[value.data[i]])
 196                 return _not(size_t);
 197             index *= 10;
 198             index += value.data[i] - '0';
 199         }
 200         return index;
 201     } else if (value.size == 1)
 202         return 0;
 203     else
 204         return _not(size_t);
 205 }
 206
 207 size_t CYGetIndex(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 208     return CYGetIndex(CYPoolUTF8String(pool, context, value));
 209 }
 210
 211 // XXX: this isn't actually right
 212 bool CYGetOffset(const char *value, ssize_t &index) {
 213     if (value[0] != '0') {
 214         char *end;
 215         index = strtol(value, &end, 10);
 216         if (value + strlen(value) == end)
 217             return true;
 218     } else if (value[1] == '\0') {
 219         index = 0;
 220         return true;
 221     }
 222
 223     return false;
 224 }
 225 /* }}} */
 226
 227 /* JavaScript *ify {{{ */
 228 void CYStringify(std::ostringstream &str, const char *data, size_t size) {
 229     unsigned quot(0), apos(0);
 230     for (const char *value(data), *end(data + size); value != end; ++value)
 231         if (*value == '"')
 232             ++quot;
 233         else if (*value == '\'')
 234             ++apos;
 235
 236     bool single(quot > apos);
 237
 238     str << (single ? '\'' : '"');
 239
 240     for (const char *value(data), *end(data + size); value != end; ++value)
 241         switch (*value) {
 242             case '\\': str << "\\\\"; break;
 243             case '\b': str << "\\b"; break;
 244             case '\f': str << "\\f"; break;
 245             case '\n': str << "\\n"; break;
 246             case '\r': str << "\\r"; break;
 247             case '\t': str << "\\t"; break;
 248             case '\v': str << "\\v"; break;
 249
 250             case '"':
 251                 if (!single)
 252                     str << "\\\"";
 253                 else goto simple;
 254             break;
 255
 256             case '\'':
 257                 if (single)
 258                     str << "\\'";
 259                 else goto simple;
 260             break;
 261
 262             default:
 263                 // this test is designed to be "awewsome", generating neither warnings nor incorrect results
 264                 if (*value < 0x20 || *value >= 0x7f)
 265                     str << "\\x" << std::setbase(16) << std::setw(2) << std::setfill('0') << unsigned(uint8_t(*value));
 266                 else simple:
 267                     str << *value;
 268         }
 269
 270     str << (single ? '\'' : '"');
 271 }
 272
 273 void CYNumerify(std::ostringstream &str, double value) {
 274     char string[32];
 275     // XXX: I want this to print 1e3 rather than 1000
 276     sprintf(string, "%.17g", value);
 277     str << string;
 278 }
 279
 280 bool CYIsKey(CYUTF8String value) {
 281     const char *data(value.data);
 282     size_t size(value.size);
 283
 284     if (size == 0)
 285         return false;
 286
 287     if (DigitRange_[data[0]]) {
 288         size_t index(CYGetIndex(value));
 289         if (index == _not(size_t))
 290             return false;
 291     } else {
 292         if (!WordStartRange_[data[0]])
 293             return false;
 294         for (size_t i(1); i != size; ++i)
 295             if (!WordEndRange_[data[i]])
 296                 return false;
 297     }
 298
 299     return true;
 300 }
 301 /* }}} */
 302
 303 static JSGlobalContextRef Context_;
 304
 305 static JSClassRef Functor_;
 306 static JSClassRef Global_;
 307 static JSClassRef Pointer_;
 308 static JSClassRef Runtime_;
 309 static JSClassRef Struct_;
 310
 311 JSStringRef Array_s;
 312 JSStringRef cy_s;
 313 JSStringRef length_s;
 314 JSStringRef message_s;
 315 JSStringRef name_s;
 316 JSStringRef pop_s;
 317 JSStringRef prototype_s;
 318 JSStringRef push_s;
 319 JSStringRef splice_s;
 320 JSStringRef toCYON_s;
 321 JSStringRef toJSON_s;
 322
 323 static JSStringRef Result_;
 324
 325 sqlite3 *Bridge_;
 326
 327 void CYFinalize(JSObjectRef object) {
 328     delete reinterpret_cast<CYData *>(JSObjectGetPrivate(object));
 329 }
 330
 331 struct CStringMapLess :
 332     std::binary_function<const char *, const char *, bool>
 333 {
 334     _finline bool operator ()(const char *lhs, const char *rhs) const {
 335         return strcmp(lhs, rhs) < 0;
 336     }
 337 };
 338
 339 void Structor_(apr_pool_t *pool, sig::Type *&type) {
 340     if (
 341         type->primitive == sig::pointer_P &&
 342         type->data.data.type != NULL &&
 343         type->data.data.type->primitive == sig::struct_P &&
 344         strcmp(type->data.data.type->name, "_objc_class") == 0
 345     ) {
 346         type->primitive = sig::typename_P;
 347         type->data.data.type = NULL;
 348         return;
 349     }
 350
 351     if (type->primitive != sig::struct_P || type->name == NULL)
 352         return;
 353
 354     sqlite3_stmt *statement;
 355
 356     _sqlcall(sqlite3_prepare(Bridge_,
 357         "select "
 358             "\"bridge\".\"mode\", "
 359             "\"bridge\".\"value\" "
 360         "from \"bridge\" "
 361         "where"
 362             " \"bridge\".\"mode\" in (3, 4) and"
 363             " \"bridge\".\"name\" = ?"
 364         " limit 1"
 365     , -1, &statement, NULL));
 366
 367     _sqlcall(sqlite3_bind_text(statement, 1, type->name, -1, SQLITE_STATIC));
 368
 369     int mode;
 370     const char *value;
 371
 372     if (_sqlcall(sqlite3_step(statement)) == SQLITE_DONE) {
 373         mode = -1;
 374         value = NULL;
 375     } else {
 376         mode = sqlite3_column_int(statement, 0);
 377         value = sqlite3_column_pooled(pool, statement, 1);
 378     }
 379
 380     _sqlcall(sqlite3_finalize(statement));
 381
 382     switch (mode) {
 383         default:
 384             _assert(false);
 385         case -1:
 386             break;
 387
 388         case 3: {
 389             sig::Parse(pool, &type->data.signature, value, &Structor_);
 390         } break;
 391
 392         case 4: {
 393             sig::Signature signature;
 394             sig::Parse(pool, &signature, value, &Structor_);
 395             type = signature.elements[0].type;
 396         } break;
 397     }
 398 }
 399
 400 JSClassRef Type_privateData::Class_;
 401
 402 struct Pointer :
 403     CYOwned
 404 {
 405     Type_privateData *type_;
 406     size_t length_;
 407
 408     Pointer(void *value, JSContextRef context, JSObjectRef owner, size_t length, sig::Type *type) :
 409         CYOwned(value, context, owner),
 410         type_(new(pool_) Type_privateData(type)),
 411         length_(length)
 412     {
 413     }
 414 };
 415
 416 struct Struct_privateData :
 417     CYOwned
 418 {
 419     Type_privateData *type_;
 420
 421     Struct_privateData(JSContextRef context, JSObjectRef owner) :
 422         CYOwned(NULL, context, owner)
 423     {
 424     }
 425 };
 426
 427 typedef std::map<const char *, Type_privateData *, CStringMapLess> TypeMap;
 428 static TypeMap Types_;
 429
 430 JSObjectRef CYMakeStruct(JSContextRef context, void *data, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 431     Struct_privateData *internal(new Struct_privateData(context, owner));
 432     apr_pool_t *pool(internal->pool_);
 433     Type_privateData *typical(new(pool) Type_privateData(type, ffi));
 434     internal->type_ = typical;
 435
 436     if (owner != NULL)
 437         internal->value_ = data;
 438     else {
 439         size_t size(typical->GetFFI()->size);
 440         void *copy(apr_palloc(internal->pool_, size));
 441         memcpy(copy, data, size);
 442         internal->value_ = copy;
 443     }
 444
 445     return JSObjectMake(context, Struct_, internal);
 446 }
 447
 448 JSValueRef CYCastJSValue(JSContextRef context, bool value) {
 449     return JSValueMakeBoolean(context, value);
 450 }
 451
 452 JSValueRef CYCastJSValue(JSContextRef context, double value) {
 453     return JSValueMakeNumber(context, value);
 454 }
 455
 456 #define CYCastJSValue_(Type_) \
 457     JSValueRef CYCastJSValue(JSContextRef context, Type_ value) { \
 458         return JSValueMakeNumber(context, static_cast<double>(value)); \
 459     }
 460
 461 CYCastJSValue_(int)
 462 CYCastJSValue_(unsigned int)
 463 CYCastJSValue_(long int)
 464 CYCastJSValue_(long unsigned int)
 465 CYCastJSValue_(long long int)
 466 CYCastJSValue_(long long unsigned int)
 467
 468 JSValueRef CYJSUndefined(JSContextRef context) {
 469     return JSValueMakeUndefined(context);
 470 }
 471
 472 double CYCastDouble(const char *value, size_t size) {
 473     char *end;
 474     double number(strtod(value, &end));
 475     if (end != value + size)
 476         return NAN;
 477     return number;
 478 }
 479
 480 double CYCastDouble(const char *value) {
 481     return CYCastDouble(value, strlen(value));
 482 }
 483
 484 double CYCastDouble(JSContextRef context, JSValueRef value) {
 485     JSValueRef exception(NULL);
 486     double number(JSValueToNumber(context, value, &exception));
 487     CYThrow(context, exception);
 488     return number;
 489 }
 490
 491 bool CYCastBool(JSContextRef context, JSValueRef value) {
 492     return JSValueToBoolean(context, value);
 493 }
 494
 495 JSValueRef CYJSNull(JSContextRef context) {
 496     return JSValueMakeNull(context);
 497 }
 498
 499 JSValueRef CYCastJSValue(JSContextRef context, JSStringRef value) {
 500     return value == NULL ? CYJSNull(context) : JSValueMakeString(context, value);
 501 }
 502
 503 JSValueRef CYCastJSValue(JSContextRef context, const char *value) {
 504     return CYCastJSValue(context, CYJSString(value));
 505 }
 506
 507 JSObjectRef CYCastJSObject(JSContextRef context, JSValueRef value) {
 508     JSValueRef exception(NULL);
 509     JSObjectRef object(JSValueToObject(context, value, &exception));
 510     CYThrow(context, exception);
 511     return object;
 512 }
 513
 514 JSValueRef CYCallAsFunction(JSContextRef context, JSObjectRef function, JSObjectRef _this, size_t count, JSValueRef arguments[]) {
 515     JSValueRef exception(NULL);
 516     JSValueRef value(JSObjectCallAsFunction(context, function, _this, count, arguments, &exception));
 517     CYThrow(context, exception);
 518     return value;
 519 }
 520
 521 bool CYIsCallable(JSContextRef context, JSValueRef value) {
 522     return value != NULL && JSValueIsObject(context, value) && JSObjectIsFunction(context, (JSObjectRef) value);
 523 }
 524
 525 static JSValueRef System_print(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 526     if (count == 0)
 527         printf("\n");
 528     else {
 529         CYPool pool;
 530         printf("%s\n", CYPoolCString(pool, context, arguments[0]));
 531     }
 532
 533     return CYJSUndefined(context);
 534 } CYCatch }
 535
 536 static size_t Nonce_(0);
 537
 538 static JSValueRef $cyq(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 539     CYPool pool;
 540     const char *name(apr_psprintf(pool, "%s%"APR_SIZE_T_FMT"", CYPoolCString(pool, context, arguments[0]), Nonce_++));
 541     return CYCastJSValue(context, name);
 542 }
 543
 544 static JSValueRef Cycript_gc_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 545     JSGarbageCollect(context);
 546     return CYJSUndefined(context);
 547 }
 548
 549 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSValueRef value, JSValueRef *exception) { CYTry {
 550     switch (JSType type = JSValueGetType(context, value)) {
 551         case kJSTypeUndefined:
 552             return "undefined";
 553         case kJSTypeNull:
 554             return "null";
 555         case kJSTypeBoolean:
 556             return CYCastBool(context, value) ? "true" : "false";
 557
 558         case kJSTypeNumber: {
 559             std::ostringstream str;
 560             CYNumerify(str, CYCastDouble(context, value));
 561             std::string value(str.str());
 562             return apr_pstrmemdup(pool, value.c_str(), value.size());
 563         } break;
 564
 565         case kJSTypeString: {
 566             std::ostringstream str;
 567             CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, value)));
 568             CYStringify(str, string.data, string.size);
 569             std::string value(str.str());
 570             return apr_pstrmemdup(pool, value.c_str(), value.size());
 571         } break;
 572
 573         case kJSTypeObject:
 574             return CYPoolCCYON(pool, context, (JSObjectRef) value);
 575         default:
 576             throw CYJSError(context, "JSValueGetType() == 0x%x", type);
 577     }
 578 } CYCatch }
 579
 580 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSValueRef value) {
 581     JSValueRef exception(NULL);
 582     const char *cyon(CYPoolCCYON(pool, context, value, &exception));
 583     CYThrow(context, exception);
 584     return cyon;
 585 }
 586
 587 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSObjectRef object) {
 588     JSValueRef toCYON(CYGetProperty(context, object, toCYON_s));
 589     if (CYIsCallable(context, toCYON)) {
 590         JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toCYON, object, 0, NULL));
 591         return CYPoolCString(pool, context, value);
 592     }
 593
 594     JSValueRef toJSON(CYGetProperty(context, object, toJSON_s));
 595     if (CYIsCallable(context, toJSON)) {
 596         JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 597         JSValueRef exception(NULL);
 598         const char *cyon(CYPoolCCYON(pool, context, CYCallAsFunction(context, (JSObjectRef) toJSON, object, 1, arguments), &exception));
 599         CYThrow(context, exception);
 600         return cyon;
 601     }
 602
 603     std::ostringstream str;
 604
 605     str << '{';
 606
 607     // XXX: this is, sadly, going to leak
 608     JSPropertyNameArrayRef names(JSObjectCopyPropertyNames(context, object));
 609
 610     bool comma(false);
 611
 612     for (size_t index(0), count(JSPropertyNameArrayGetCount(names)); index != count; ++index) {
 613         JSStringRef name(JSPropertyNameArrayGetNameAtIndex(names, index));
 614         JSValueRef value(CYGetProperty(context, object, name));
 615
 616         if (comma)
 617             str << ',';
 618         else
 619             comma = true;
 620
 621         CYUTF8String string(CYPoolUTF8String(pool, context, name));
 622         if (CYIsKey(string))
 623             str << string.data;
 624         else
 625             CYStringify(str, string.data, string.size);
 626
 627         str << ':' << CYPoolCCYON(pool, context, value);
 628     }
 629
 630     str << '}';
 631
 632     JSPropertyNameArrayRelease(names);
 633
 634     std::string string(str.str());
 635     return apr_pstrmemdup(pool, string.c_str(), string.size());
 636 }
 637
 638 static JSValueRef Array_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 639     CYPool pool;
 640     std::ostringstream str;
 641
 642     str << '[';
 643
 644     JSValueRef length(CYGetProperty(context, _this, length_s));
 645     bool comma(false);
 646
 647     for (size_t index(0), count(CYCastDouble(context, length)); index != count; ++index) {
 648         JSValueRef value(CYGetProperty(context, _this, index));
 649
 650         if (comma)
 651             str << ',';
 652         else
 653             comma = true;
 654
 655         if (!JSValueIsUndefined(context, value))
 656             str << CYPoolCCYON(pool, context, value);
 657         else {
 658             str << ',';
 659             comma = false;
 660         }
 661     }
 662
 663     str << ']';
 664
 665     std::string value(str.str());
 666     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 667 } CYCatch }
 668
 669 JSObjectRef CYMakePointer(JSContextRef context, void *pointer, size_t length, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 670     Pointer *internal(new Pointer(pointer, context, owner, length, type));
 671     return JSObjectMake(context, Pointer_, internal);
 672 }
 673
 674 static JSObjectRef CYMakeFunctor(JSContextRef context, void (*function)(), const char *type) {
 675     cy::Functor *internal(new cy::Functor(type, function));
 676     return JSObjectMake(context, Functor_, internal);
 677 }
 678
 679 static bool CYGetOffset(apr_pool_t *pool, JSContextRef context, JSStringRef value, ssize_t &index) {
 680     return CYGetOffset(CYPoolCString(pool, context, value), index);
 681 }
 682
 683 void *CYCastPointer_(JSContextRef context, JSValueRef value) {
 684     switch (JSValueGetType(context, value)) {
 685         case kJSTypeNull:
 686             return NULL;
 687         /*case kJSTypeObject:
 688             if (JSValueIsObjectOfClass(context, value, Pointer_)) {
 689                 Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate((JSObjectRef) value)));
 690                 return internal->value_;
 691             }*/
 692         default:
 693             double number(CYCastDouble(context, value));
 694             if (std::isnan(number))
 695                 throw CYJSError(context, "cannot convert value to pointer");
 696             return reinterpret_cast<void *>(static_cast<uintptr_t>(static_cast<long long>(number)));
 697     }
 698 }
 699
 700 void CYPoolFFI(apr_pool_t *pool, JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, JSValueRef value) {
 701     switch (type->primitive) {
 702         case sig::boolean_P:
 703             *reinterpret_cast<bool *>(data) = JSValueToBoolean(context, value);
 704         break;
 705
 706 #define CYPoolFFI_(primitive, native) \
 707         case sig::primitive ## _P: \
 708             *reinterpret_cast<native *>(data) = CYCastDouble(context, value); \
 709         break;
 710
 711         CYPoolFFI_(uchar, unsigned char)
 712         CYPoolFFI_(char, char)
 713         CYPoolFFI_(ushort, unsigned short)
 714         CYPoolFFI_(short, short)
 715         CYPoolFFI_(ulong, unsigned long)
 716         CYPoolFFI_(long, long)
 717         CYPoolFFI_(uint, unsigned int)
 718         CYPoolFFI_(int, int)
 719         CYPoolFFI_(ulonglong, unsigned long long)
 720         CYPoolFFI_(longlong, long long)
 721         CYPoolFFI_(float, float)
 722         CYPoolFFI_(double, double)
 723
 724         case sig::array_P: {
 725             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 726             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 727             for (size_t index(0); index != type->data.data.size; ++index) {
 728                 ffi_type *field(ffi->elements[index]);
 729
 730                 JSValueRef rhs;
 731                 if (aggregate == NULL)
 732                     rhs = value;
 733                 else {
 734                     rhs = CYGetProperty(context, aggregate, index);
 735                     if (JSValueIsUndefined(context, rhs))
 736                         throw CYJSError(context, "unable to extract array value");
 737                 }
 738
 739                 CYPoolFFI(pool, context, type->data.data.type, field, base, rhs);
 740                 // XXX: alignment?
 741                 base += field->size;
 742             }
 743         } break;
 744
 745         case sig::pointer_P:
 746             *reinterpret_cast<void **>(data) = CYCastPointer<void *>(context, value);
 747         break;
 748
 749         case sig::string_P:
 750             *reinterpret_cast<const char **>(data) = CYPoolCString(pool, context, value);
 751         break;
 752
 753         case sig::struct_P: {
 754             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 755             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 756             for (size_t index(0); index != type->data.signature.count; ++index) {
 757                 sig::Element *element(&type->data.signature.elements[index]);
 758                 ffi_type *field(ffi->elements[index]);
 759
 760                 JSValueRef rhs;
 761                 if (aggregate == NULL)
 762                     rhs = value;
 763                 else {
 764                     rhs = CYGetProperty(context, aggregate, index);
 765                     if (JSValueIsUndefined(context, rhs)) {
 766                         if (element->name != NULL)
 767                             rhs = CYGetProperty(context, aggregate, CYJSString(element->name));
 768                         else
 769                             goto undefined;
 770                         if (JSValueIsUndefined(context, rhs)) undefined:
 771                             throw CYJSError(context, "unable to extract structure value");
 772                     }
 773                 }
 774
 775                 CYPoolFFI(pool, context, element->type, field, base, rhs);
 776                 // XXX: alignment?
 777                 base += field->size;
 778             }
 779         } break;
 780
 781         case sig::void_P:
 782         break;
 783
 784         default:
 785             if (hooks_ != NULL && hooks_->PoolFFI != NULL)
 786                 if ((*hooks_->PoolFFI)(pool, context, type, ffi, data, value))
 787                     return;
 788
 789             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 790     }
 791 }
 792
 793 JSValueRef CYFromFFI(JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, bool initialize, JSObjectRef owner) {
 794     switch (type->primitive) {
 795         case sig::boolean_P:
 796             return CYCastJSValue(context, *reinterpret_cast<bool *>(data));
 797
 798 #define CYFromFFI_(primitive, native) \
 799         case sig::primitive ## _P: \
 800             return CYCastJSValue(context, *reinterpret_cast<native *>(data)); \
 801
 802         CYFromFFI_(uchar, unsigned char)
 803         CYFromFFI_(char, char)
 804         CYFromFFI_(ushort, unsigned short)
 805         CYFromFFI_(short, short)
 806         CYFromFFI_(ulong, unsigned long)
 807         CYFromFFI_(long, long)
 808         CYFromFFI_(uint, unsigned int)
 809         CYFromFFI_(int, int)
 810         CYFromFFI_(ulonglong, unsigned long long)
 811         CYFromFFI_(longlong, long long)
 812         CYFromFFI_(float, float)
 813         CYFromFFI_(double, double)
 814
 815         case sig::array_P:
 816             if (void *pointer = data)
 817                 return CYMakePointer(context, pointer, type->data.data.size, type->data.data.type, NULL, owner);
 818             else goto null;
 819
 820         case sig::pointer_P:
 821             if (void *pointer = *reinterpret_cast<void **>(data))
 822                 return CYMakePointer(context, pointer, _not(size_t), type->data.data.type, NULL, owner);
 823             else goto null;
 824
 825         case sig::string_P:
 826             if (char *utf8 = *reinterpret_cast<char **>(data))
 827                 return CYCastJSValue(context, utf8);
 828             else goto null;
 829
 830         case sig::struct_P:
 831             return CYMakeStruct(context, data, type, ffi, owner);
 832         case sig::void_P:
 833             return CYJSUndefined(context);
 834
 835         null:
 836             return CYJSNull(context);
 837         default:
 838             if (hooks_ != NULL && hooks_->FromFFI != NULL)
 839                 if (JSValueRef value = (*hooks_->FromFFI)(context, type, ffi, data, initialize, owner))
 840                     return value;
 841
 842             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 843     }
 844 }
 845
 846 static void FunctionClosure_(ffi_cif *cif, void *result, void **arguments, void *arg) {
 847     Closure_privateData *internal(reinterpret_cast<Closure_privateData *>(arg));
 848
 849     JSContextRef context(internal->context_);
 850
 851     size_t count(internal->cif_.nargs);
 852     JSValueRef values[count];
 853
 854     for (size_t index(0); index != count; ++index)
 855         values[index] = CYFromFFI(context, internal->signature_.elements[1 + index].type, internal->cif_.arg_types[index], arguments[index]);
 856
 857     JSValueRef value(CYCallAsFunction(context, internal->function_, NULL, count, values));
 858     CYPoolFFI(NULL, context, internal->signature_.elements[0].type, internal->cif_.rtype, result, value);
 859 }
 860
 861 Closure_privateData *CYMakeFunctor_(JSContextRef context, JSObjectRef function, const char *type, void (*callback)(ffi_cif *, void *, void **, void *)) {
 862     // XXX: in case of exceptions this will leak
 863     // XXX: in point of fact, this may /need/ to leak :(
 864     Closure_privateData *internal(new Closure_privateData(context, function, type));
 865
 866     ffi_closure *closure((ffi_closure *) _syscall(mmap(
 867         NULL, sizeof(ffi_closure),
 868         PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE,
 869         -1, 0
 870     )));
 871
 872     ffi_status status(ffi_prep_closure(closure, &internal->cif_, callback, internal));
 873     _assert(status == FFI_OK);
 874
 875     _syscall(mprotect(closure, sizeof(*closure), PROT_READ | PROT_EXEC));
 876
 877     internal->value_ = closure;
 878
 879     return internal;
 880 }
 881
 882 static JSObjectRef CYMakeFunctor(JSContextRef context, JSObjectRef function, const char *type) {
 883     Closure_privateData *internal(CYMakeFunctor_(context, function, type, &FunctionClosure_));
 884     return JSObjectMake(context, Functor_, internal);
 885 }
 886
 887 JSObjectRef CYGetCachedObject(JSContextRef context, JSStringRef name) {
 888     return CYCastJSObject(context, CYGetProperty(context, CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s)), name));
 889 }
 890
 891 static JSObjectRef CYMakeFunctor(JSContextRef context, JSValueRef value, const char *type) {
 892     JSObjectRef Function(CYGetCachedObject(context, CYJSString("Function")));
 893
 894     JSValueRef exception(NULL);
 895     bool function(JSValueIsInstanceOfConstructor(context, value, Function, &exception));
 896     CYThrow(context, exception);
 897
 898     if (function) {
 899         JSObjectRef function(CYCastJSObject(context, value));
 900         return CYMakeFunctor(context, function, type);
 901     } else {
 902         void (*function)()(CYCastPointer<void (*)()>(context, value));
 903         return CYMakeFunctor(context, function, type);
 904     }
 905 }
 906
 907 static bool Index_(apr_pool_t *pool, JSContextRef context, Struct_privateData *internal, JSStringRef property, ssize_t &index, uint8_t *&base) {
 908     Type_privateData *typical(internal->type_);
 909     sig::Type *type(typical->type_);
 910     if (type == NULL)
 911         return false;
 912
 913     const char *name(CYPoolCString(pool, context, property));
 914     size_t length(strlen(name));
 915     double number(CYCastDouble(name, length));
 916
 917     size_t count(type->data.signature.count);
 918
 919     if (std::isnan(number)) {
 920         if (property == NULL)
 921             return false;
 922
 923         sig::Element *elements(type->data.signature.elements);
 924
 925         for (size_t local(0); local != count; ++local) {
 926             sig::Element *element(&elements[local]);
 927             if (element->name != NULL && strcmp(name, element->name) == 0) {
 928                 index = local;
 929                 goto base;
 930             }
 931         }
 932
 933         return false;
 934     } else {
 935         index = static_cast<ssize_t>(number);
 936         if (index != number || index < 0 || static_cast<size_t>(index) >= count)
 937             return false;
 938     }
 939
 940   base:
 941     ffi_type **elements(typical->GetFFI()->elements);
 942
 943     base = reinterpret_cast<uint8_t *>(internal->value_);
 944     for (ssize_t local(0); local != index; ++local)
 945         base += elements[local]->size;
 946
 947     return true;
 948 }
 949
 950 static JSValueRef Pointer_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 951     CYPool pool;
 952     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 953
 954     if (JSStringIsEqual(property, length_s))
 955         return internal->length_ == _not(size_t) ? CYJSUndefined(context) : CYCastJSValue(context, internal->length_);
 956
 957     Type_privateData *typical(internal->type_);
 958
 959     if (typical->type_ == NULL)
 960         return NULL;
 961
 962     ssize_t offset;
 963     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 964         offset = 0;
 965     else if (!CYGetOffset(pool, context, property, offset))
 966         return NULL;
 967
 968     ffi_type *ffi(typical->GetFFI());
 969
 970     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 971     base += ffi->size * offset;
 972
 973     JSObjectRef owner(internal->GetOwner() ?: object);
 974     return CYFromFFI(context, typical->type_, ffi, base, false, owner);
 975 } CYCatch }
 976
 977 static bool Pointer_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 978     CYPool pool;
 979     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 980     Type_privateData *typical(internal->type_);
 981
 982     if (typical->type_ == NULL)
 983         return NULL;
 984
 985     ssize_t offset;
 986     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 987         offset = 0;
 988     else if (!CYGetOffset(pool, context, property, offset))
 989         return NULL;
 990
 991     ffi_type *ffi(typical->GetFFI());
 992
 993     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 994     base += ffi->size * offset;
 995
 996     CYPoolFFI(NULL, context, typical->type_, ffi, base, value);
 997     return true;
 998 } CYCatch }
 999
1000 static JSValueRef Struct_callAsFunction_$cya(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1001     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(_this)));
1002     Type_privateData *typical(internal->type_);
1003     return CYMakePointer(context, internal->value_, _not(size_t), typical->type_, typical->ffi_, _this);
1004 }
1005
1006 static JSValueRef Struct_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1007     CYPool pool;
1008     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
1009     Type_privateData *typical(internal->type_);
1010
1011     ssize_t index;
1012     uint8_t *base;
1013
1014     if (!Index_(pool, context, internal, property, index, base))
1015         return NULL;
1016
1017     JSObjectRef owner(internal->GetOwner() ?: object);
1018
1019     return CYFromFFI(context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, false, owner);
1020 } CYCatch }
1021
1022 static bool Struct_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
1023     CYPool pool;
1024     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
1025     Type_privateData *typical(internal->type_);
1026
1027     ssize_t index;
1028     uint8_t *base;
1029
1030     if (!Index_(pool, context, internal, property, index, base))
1031         return false;
1032
1033     CYPoolFFI(NULL, context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, value);
1034     return true;
1035 } CYCatch }
1036
1037 static void Struct_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
1038     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
1039     Type_privateData *typical(internal->type_);
1040     sig::Type *type(typical->type_);
1041
1042     if (type == NULL)
1043         return;
1044
1045     size_t count(type->data.signature.count);
1046     sig::Element *elements(type->data.signature.elements);
1047
1048     char number[32];
1049
1050     for (size_t index(0); index != count; ++index) {
1051         const char *name;
1052         name = elements[index].name;
1053
1054         if (name == NULL) {
1055             sprintf(number, "%zu", index);
1056             name = number;
1057         }
1058
1059         JSPropertyNameAccumulatorAddName(names, CYJSString(name));
1060     }
1061 }
1062
1063 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 {
1064     if (setups + count != signature->count - 1)
1065         throw CYJSError(context, "incorrect number of arguments to ffi function");
1066
1067     size_t size(setups + count);
1068     void *values[size];
1069     memcpy(values, setup, sizeof(void *) * setups);
1070
1071     for (size_t index(setups); index != size; ++index) {
1072         sig::Element *element(&signature->elements[index + 1]);
1073         ffi_type *ffi(cif->arg_types[index]);
1074         // XXX: alignment?
1075         values[index] = new(pool) uint8_t[ffi->size];
1076         CYPoolFFI(pool, context, element->type, ffi, values[index], arguments[index - setups]);
1077     }
1078
1079     uint8_t value[cif->rtype->size];
1080
1081     if (hooks_ != NULL && hooks_->CallFunction != NULL)
1082         (*hooks_->CallFunction)(context, cif, function, value, values);
1083     else
1084         ffi_call(cif, function, value, values);
1085
1086     return CYFromFFI(context, signature->elements[0].type, cif->rtype, value, initialize);
1087 } CYCatch }
1088
1089 static JSValueRef Functor_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1090     CYPool pool;
1091     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
1092     return CYCallFunction(pool, context, 0, NULL, count, arguments, false, exception, &internal->signature_, &internal->cif_, internal->GetValue());
1093 }
1094
1095 static JSObjectRef CYMakeType(JSContextRef context, const char *type) {
1096     Type_privateData *internal(new Type_privateData(type));
1097     return JSObjectMake(context, Type_privateData::Class_, internal);
1098 }
1099
1100 static JSObjectRef CYMakeType(JSContextRef context, sig::Type *type) {
1101     Type_privateData *internal(new Type_privateData(type));
1102     return JSObjectMake(context, Type_privateData::Class_, internal);
1103 }
1104
1105 static void *CYCastSymbol(const char *name) {
1106     return dlsym(RTLD_DEFAULT, name);
1107 }
1108
1109 static JSValueRef Runtime_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1110     CYPool pool;
1111     CYUTF8String name(CYPoolUTF8String(pool, context, property));
1112
1113     if (hooks_ != NULL && hooks_->RuntimeProperty != NULL)
1114         if (JSValueRef value = (*hooks_->RuntimeProperty)(context, name))
1115             return value;
1116
1117     sqlite3_stmt *statement;
1118
1119     _sqlcall(sqlite3_prepare(Bridge_,
1120         "select "
1121             "\"bridge\".\"mode\", "
1122             "\"bridge\".\"value\" "
1123         "from \"bridge\" "
1124         "where"
1125             " \"bridge\".\"name\" = ?"
1126         " limit 1"
1127     , -1, &statement, NULL));
1128
1129     _sqlcall(sqlite3_bind_text(statement, 1, name.data, name.size, SQLITE_STATIC));
1130
1131     int mode;
1132     const char *value;
1133
1134     if (_sqlcall(sqlite3_step(statement)) == SQLITE_DONE) {
1135         mode = -1;
1136         value = NULL;
1137     } else {
1138         mode = sqlite3_column_int(statement, 0);
1139         value = sqlite3_column_pooled(pool, statement, 1);
1140     }
1141
1142     _sqlcall(sqlite3_finalize(statement));
1143
1144     switch (mode) {
1145         default:
1146             _assert(false);
1147         case -1:
1148             return NULL;
1149
1150         case 0:
1151             return JSEvaluateScript(CYGetJSContext(context), CYJSString(value), NULL, NULL, 0, NULL);
1152
1153         case 1:
1154             if (void (*symbol)() = reinterpret_cast<void (*)()>(CYCastSymbol(name.data)))
1155                 return CYMakeFunctor(context, symbol, value);
1156             else return NULL;
1157
1158         case 2:
1159             if (void *symbol = CYCastSymbol(name.data)) {
1160                 // XXX: this is horrendously inefficient
1161                 sig::Signature signature;
1162                 sig::Parse(pool, &signature, value, &Structor_);
1163                 ffi_cif cif;
1164                 sig::sig_ffi_cif(pool, &sig::ObjectiveC, &signature, &cif);
1165                 return CYFromFFI(context, signature.elements[0].type, cif.rtype, symbol);
1166             } else return NULL;
1167
1168         // XXX: implement case 3
1169         case 4:
1170             return CYMakeType(context, value);
1171     }
1172 } CYCatch }
1173
1174 static JSObjectRef Pointer_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1175     if (count != 2)
1176         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1177
1178     CYPool pool;
1179
1180     void *value(CYCastPointer<void *>(context, arguments[0]));
1181     const char *type(CYPoolCString(pool, context, arguments[1]));
1182
1183     sig::Signature signature;
1184     sig::Parse(pool, &signature, type, &Structor_);
1185
1186     return CYMakePointer(context, value, _not(size_t), signature.elements[0].type, NULL, NULL);
1187 } CYCatch }
1188
1189 static JSObjectRef Type_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1190     if (count != 1)
1191         throw CYJSError(context, "incorrect number of arguments to Type constructor");
1192     CYPool pool;
1193     const char *type(CYPoolCString(pool, context, arguments[0]));
1194     return CYMakeType(context, type);
1195 } CYCatch }
1196
1197 static JSValueRef Type_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1198     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1199
1200     sig::Type type;
1201
1202     if (JSStringIsEqualToUTF8CString(property, "$cyi")) {
1203         type.primitive = sig::pointer_P;
1204         type.data.data.size = 0;
1205     } else {
1206         CYPool pool;
1207         size_t index(CYGetIndex(pool, context, property));
1208         if (index == _not(size_t))
1209             return NULL;
1210         type.primitive = sig::array_P;
1211         type.data.data.size = index;
1212     }
1213
1214     type.name = NULL;
1215     type.flags = 0;
1216
1217     type.data.data.type = internal->type_;
1218
1219     return CYMakeType(context, &type);
1220 } CYCatch }
1221
1222 static JSValueRef Type_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1223     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1224
1225     if (count != 1)
1226         throw CYJSError(context, "incorrect number of arguments to type cast function");
1227     sig::Type *type(internal->type_);
1228     ffi_type *ffi(internal->GetFFI());
1229     // XXX: alignment?
1230     uint8_t value[ffi->size];
1231     CYPool pool;
1232     CYPoolFFI(pool, context, type, ffi, value, arguments[0]);
1233     return CYFromFFI(context, type, ffi, value);
1234 } CYCatch }
1235
1236 static JSObjectRef Type_callAsConstructor(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1237     if (count != 0)
1238         throw CYJSError(context, "incorrect number of arguments to type cast function");
1239     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1240
1241     sig::Type *type(internal->type_);
1242     size_t length;
1243
1244     if (type->primitive != sig::array_P)
1245         length = _not(size_t);
1246     else {
1247         length = type->data.data.size;
1248         type = type->data.data.type;
1249     }
1250
1251     void *value(malloc(internal->GetFFI()->size));
1252     return CYMakePointer(context, value, length, type, NULL, NULL);
1253 } CYCatch }
1254
1255 static JSObjectRef Functor_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1256     if (count != 2)
1257         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1258     CYPool pool;
1259     const char *type(CYPoolCString(pool, context, arguments[1]));
1260     return CYMakeFunctor(context, arguments[0], type);
1261 } CYCatch }
1262
1263 static JSValueRef CYValue_callAsFunction_valueOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1264     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1265     return CYCastJSValue(context, reinterpret_cast<uintptr_t>(internal->value_));
1266 } CYCatch }
1267
1268 static JSValueRef CYValue_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1269     return CYValue_callAsFunction_valueOf(context, object, _this, count, arguments, exception);
1270 }
1271
1272 static JSValueRef CYValue_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1273     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1274     char string[32];
1275     sprintf(string, "%p", internal->value_);
1276     return CYCastJSValue(context, string);
1277 } CYCatch }
1278
1279 static JSValueRef Pointer_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1280     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(_this)));
1281     if (internal->length_ != _not(size_t))
1282         // XXX: maybe dynamically look up Array.toCYON?
1283         return Array_callAsFunction_toCYON(context, object, _this, count, arguments, exception);
1284     else {
1285         char string[32];
1286         sprintf(string, "%p", internal->value_);
1287         return CYCastJSValue(context, string);
1288     }
1289 } CYCatch }
1290
1291 static JSValueRef Type_callAsFunction_toString(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1292     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1293     CYPool pool;
1294     const char *type(sig::Unparse(pool, internal->type_));
1295     return CYCastJSValue(context, CYJSString(type));
1296 } CYCatch }
1297
1298 static JSValueRef Type_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1299     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1300     CYPool pool;
1301     const char *type(sig::Unparse(pool, internal->type_));
1302     size_t size(strlen(type));
1303     char *cyon(new(pool) char[12 + size + 1]);
1304     memcpy(cyon, "new Type(\"", 10);
1305     cyon[12 + size] = '\0';
1306     cyon[12 + size - 2] = '"';
1307     cyon[12 + size - 1] = ')';
1308     memcpy(cyon + 10, type, size);
1309     return CYCastJSValue(context, CYJSString(cyon));
1310 } CYCatch }
1311
1312 static JSValueRef Type_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1313     return Type_callAsFunction_toString(context, object, _this, count, arguments, exception);
1314 }
1315
1316 static JSStaticFunction Pointer_staticFunctions[4] = {
1317     {"toCYON", &Pointer_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1318     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1319     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1320     {NULL, NULL, 0}
1321 };
1322
1323 static JSStaticFunction Struct_staticFunctions[2] = {
1324     {"$cya", &Struct_callAsFunction_$cya, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1325     {NULL, NULL, 0}
1326 };
1327
1328 static JSStaticFunction Functor_staticFunctions[4] = {
1329     {"toCYON", &CYValue_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1330     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1331     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1332     {NULL, NULL, 0}
1333 };
1334
1335 namespace cy {
1336     JSStaticFunction const * const Functor::StaticFunctions = Functor_staticFunctions;
1337 }
1338
1339 static JSStaticFunction Type_staticFunctions[4] = {
1340     {"toCYON", &Type_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1341     {"toJSON", &Type_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1342     {"toString", &Type_callAsFunction_toString, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1343     {NULL, NULL, 0}
1344 };
1345
1346 static JSObjectRef (*JSObjectMakeArray$)(JSContextRef, size_t, const JSValueRef[], JSValueRef *);
1347
1348 void CYSetArgs(int argc, const char *argv[]) {
1349     JSContextRef context(CYGetJSContext());
1350     JSValueRef args[argc];
1351     for (int i(0); i != argc; ++i)
1352         args[i] = CYCastJSValue(context, argv[i]);
1353
1354     JSObjectRef array;
1355     if (JSObjectMakeArray$ != NULL) {
1356         JSValueRef exception(NULL);
1357         array = (*JSObjectMakeArray$)(context, argc, args, &exception);
1358         CYThrow(context, exception);
1359     } else {
1360         JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array")));
1361         JSValueRef value(CYCallAsFunction(context, Array, NULL, argc, args));
1362         array = CYCastJSObject(context, value);
1363     }
1364
1365     JSObjectRef System(CYGetCachedObject(context, CYJSString("System")));
1366     CYSetProperty(context, System, CYJSString("args"), array);
1367 }
1368
1369 JSObjectRef CYGetGlobalObject(JSContextRef context) {
1370     return JSContextGetGlobalObject(context);
1371 }
1372
1373 const char *CYExecute(apr_pool_t *pool, const char *code) {
1374     JSContextRef context(CYGetJSContext());
1375     JSValueRef exception(NULL), result;
1376
1377     void *handle;
1378     if (hooks_ != NULL && hooks_->ExecuteStart != NULL)
1379         handle = (*hooks_->ExecuteStart)(context);
1380     else
1381         handle = NULL;
1382
1383     const char *json;
1384
1385     try {
1386         result = JSEvaluateScript(context, CYJSString(code), NULL, NULL, 0, &exception);
1387     } catch (const char *error) {
1388         return error;
1389     }
1390
1391     if (exception != NULL) { error:
1392         result = exception;
1393         exception = NULL;
1394     }
1395
1396     if (JSValueIsUndefined(context, result))
1397         return NULL;
1398
1399     try {
1400         json = CYPoolCCYON(pool, context, result, &exception);
1401     } catch (const char *error) {
1402         return error;
1403     }
1404
1405     if (exception != NULL)
1406         goto error;
1407
1408     CYSetProperty(context, CYGetGlobalObject(context), Result_, result);
1409
1410     if (hooks_ != NULL && hooks_->ExecuteEnd != NULL)
1411         (*hooks_->ExecuteEnd)(context, handle);
1412     return json;
1413 }
1414
1415 static apr_pool_t *Pool_;
1416
1417 static bool initialized_;
1418
1419 void CYInitialize() {
1420     if (!initialized_)
1421         initialized_ = true;
1422     else return;
1423
1424     _aprcall(apr_initialize());
1425     _aprcall(apr_pool_create(&Pool_, NULL));
1426     _sqlcall(sqlite3_open("/usr/lib/libcycript.db", &Bridge_));
1427
1428     JSObjectMakeArray$ = reinterpret_cast<JSObjectRef (*)(JSContextRef, size_t, const JSValueRef[], JSValueRef *)>(dlsym(RTLD_DEFAULT, "JSObjectMakeArray"));
1429
1430     JSClassDefinition definition;
1431
1432     definition = kJSClassDefinitionEmpty;
1433     definition.className = "Functor";
1434     definition.staticFunctions = cy::Functor::StaticFunctions;
1435     definition.callAsFunction = &Functor_callAsFunction;
1436     definition.finalize = &CYFinalize;
1437     Functor_ = JSClassCreate(&definition);
1438
1439     definition = kJSClassDefinitionEmpty;
1440     definition.className = "Pointer";
1441     definition.staticFunctions = Pointer_staticFunctions;
1442     definition.getProperty = &Pointer_getProperty;
1443     definition.setProperty = &Pointer_setProperty;
1444     definition.finalize = &CYFinalize;
1445     Pointer_ = JSClassCreate(&definition);
1446
1447     definition = kJSClassDefinitionEmpty;
1448     definition.className = "Struct";
1449     definition.staticFunctions = Struct_staticFunctions;
1450     definition.getProperty = &Struct_getProperty;
1451     definition.setProperty = &Struct_setProperty;
1452     definition.getPropertyNames = &Struct_getPropertyNames;
1453     definition.finalize = &CYFinalize;
1454     Struct_ = JSClassCreate(&definition);
1455
1456     definition = kJSClassDefinitionEmpty;
1457     definition.className = "Type";
1458     definition.staticFunctions = Type_staticFunctions;
1459     definition.getProperty = &Type_getProperty;
1460     definition.callAsFunction = &Type_callAsFunction;
1461     definition.callAsConstructor = &Type_callAsConstructor;
1462     definition.finalize = &CYFinalize;
1463     Type_privateData::Class_ = JSClassCreate(&definition);
1464
1465     definition = kJSClassDefinitionEmpty;
1466     definition.className = "Runtime";
1467     definition.getProperty = &Runtime_getProperty;
1468     Runtime_ = JSClassCreate(&definition);
1469
1470     definition = kJSClassDefinitionEmpty;
1471     //definition.getProperty = &Global_getProperty;
1472     Global_ = JSClassCreate(&definition);
1473
1474     Array_s = JSStringCreateWithUTF8CString("Array");
1475     cy_s = JSStringCreateWithUTF8CString("$cy");
1476     length_s = JSStringCreateWithUTF8CString("length");
1477     message_s = JSStringCreateWithUTF8CString("message");
1478     name_s = JSStringCreateWithUTF8CString("name");
1479     pop_s = JSStringCreateWithUTF8CString("pop");
1480     prototype_s = JSStringCreateWithUTF8CString("prototype");
1481     push_s = JSStringCreateWithUTF8CString("push");
1482     splice_s = JSStringCreateWithUTF8CString("splice");
1483     toCYON_s = JSStringCreateWithUTF8CString("toCYON");
1484     toJSON_s = JSStringCreateWithUTF8CString("toJSON");
1485
1486     Result_ = JSStringCreateWithUTF8CString("_");
1487
1488     if (hooks_ != NULL && hooks_->Initialize != NULL)
1489         (*hooks_->Initialize)();
1490 }
1491
1492 apr_pool_t *CYGetGlobalPool() {
1493     CYInitialize();
1494     return Pool_;
1495 }
1496
1497 void CYThrow(JSContextRef context, JSValueRef value) {
1498     if (value != NULL)
1499         throw CYJSError(context, value);
1500 }
1501
1502 const char *CYJSError::PoolCString(apr_pool_t *pool) const {
1503     // XXX: this used to be CYPoolCString
1504     return CYPoolCCYON(pool, context_, value_);
1505 }
1506
1507 JSValueRef CYJSError::CastJSValue(JSContextRef context) const {
1508     // XXX: what if the context is different?
1509     return value_;
1510 }
1511
1512 void CYThrow(const char *format, ...) {
1513     va_list args;
1514     va_start (args, format);
1515     throw CYPoolError(format, args);
1516     // XXX: does this matter? :(
1517     va_end (args);
1518 }
1519
1520 const char *CYPoolError::PoolCString(apr_pool_t *pool) const {
1521     return apr_pstrdup(pool, message_);
1522 }
1523
1524 CYPoolError::CYPoolError(const char *format, ...) {
1525     va_list args;
1526     va_start (args, format);
1527     message_ = apr_pvsprintf(pool_, format, args);
1528     va_end (args);
1529 }
1530
1531 CYPoolError::CYPoolError(const char *format, va_list args) {
1532     message_ = apr_pvsprintf(pool_, format, args);
1533 }
1534
1535 JSValueRef CYCastJSError(JSContextRef context, const char *message) {
1536     JSObjectRef Error(CYGetCachedObject(context, CYJSString("Error")));
1537
1538     JSValueRef arguments[1] = {CYCastJSValue(context, message)};
1539
1540     JSValueRef exception(NULL);
1541     JSValueRef value(JSObjectCallAsConstructor(context, Error, 1, arguments, &exception));
1542     CYThrow(context, exception);
1543
1544     return value;
1545 }
1546
1547 JSValueRef CYPoolError::CastJSValue(JSContextRef context) const {
1548     return CYCastJSError(context, message_);
1549 }
1550
1551 CYJSError::CYJSError(JSContextRef context, const char *format, ...) {
1552     _assert(context != NULL);
1553
1554     CYPool pool;
1555
1556     va_list args;
1557     va_start (args, format);
1558     const char *message(apr_pvsprintf(pool, format, args));
1559     va_end (args);
1560
1561     value_ = CYCastJSError(context, message);
1562 }
1563
1564 JSGlobalContextRef CYGetJSContext(JSContextRef context) {
1565     // XXX: do something better
1566     return Context_;
1567 }
1568
1569 void CYSetupContext(JSGlobalContextRef context) {
1570     JSObjectRef global(CYGetGlobalObject(context));
1571
1572     JSObjectRef cy(JSObjectMake(context, NULL, NULL));
1573     CYSetProperty(context, global, cy_s, cy);
1574
1575     JSObjectRef Array(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Array"))));
1576     CYSetProperty(context, cy, CYJSString("Array"), Array);
1577
1578     JSObjectRef Array_prototype(CYCastJSObject(context, CYGetProperty(context, Array, prototype_s)));
1579     CYSetProperty(context, cy, CYJSString("Array_prototype"), Array_prototype);
1580
1581     JSObjectRef Error(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Error"))));
1582     CYSetProperty(context, cy, CYJSString("Error"), Error);
1583
1584     JSObjectRef Function(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Function"))));
1585     CYSetProperty(context, cy, CYJSString("Function"), Function);
1586
1587     JSObjectRef Function_prototype(CYCastJSObject(context, CYGetProperty(context, Function, prototype_s)));
1588     CYSetProperty(context, cy, CYJSString("Function_prototype"), Function_prototype);
1589
1590     JSObjectRef Object(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Object"))));
1591     CYSetProperty(context, cy, CYJSString("Object"), Object);
1592
1593     JSObjectRef Object_prototype(CYCastJSObject(context, CYGetProperty(context, Object, prototype_s)));
1594     CYSetProperty(context, cy, CYJSString("Object_prototype"), Object_prototype);
1595
1596     JSObjectRef String(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("String"))));
1597     CYSetProperty(context, cy, CYJSString("String"), String);
1598
1599     JSObjectSetPrototype(context, global, JSObjectMake(context, Runtime_, NULL));
1600
1601     CYSetProperty(context, Array_prototype, toCYON_s, &Array_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1602
1603     JSObjectRef Functor(JSObjectMakeConstructor(context, Functor_, &Functor_new));
1604     JSObjectSetPrototype(context, CYCastJSObject(context, CYGetProperty(context, Functor, prototype_s)), Function_prototype);
1605     CYSetProperty(context, global, CYJSString("Functor"), Functor);
1606
1607     CYSetProperty(context, global, CYJSString("Pointer"), JSObjectMakeConstructor(context, Pointer_, &Pointer_new));
1608     CYSetProperty(context, global, CYJSString("Type"), JSObjectMakeConstructor(context, Type_privateData::Class_, &Type_new));
1609
1610     JSObjectRef cycript(JSObjectMake(context, NULL, NULL));
1611     CYSetProperty(context, global, CYJSString("Cycript"), cycript);
1612     CYSetProperty(context, cycript, CYJSString("gc"), &Cycript_gc_callAsFunction);
1613
1614     CYSetProperty(context, global, CYJSString("$cyq"), &$cyq);
1615
1616     JSObjectRef System(JSObjectMake(context, NULL, NULL));
1617     CYSetProperty(context, cy, CYJSString("System"), Function);
1618
1619     CYSetProperty(context, global, CYJSString("system"), System);
1620     CYSetProperty(context, System, CYJSString("args"), CYJSNull(context));
1621     //CYSetProperty(context, System, CYJSString("global"), global);
1622     CYSetProperty(context, System, CYJSString("print"), &System_print);
1623
1624     if (hooks_ != NULL && hooks_->SetupContext != NULL)
1625         (*hooks_->SetupContext)(context);
1626 }
1627
1628 JSGlobalContextRef CYGetJSContext() {
1629     CYInitialize();
1630
1631     if (Context_ == NULL) {
1632         Context_ = JSGlobalContextCreate(Global_);
1633         CYSetupContext(Context_);
1634     }
1635
1636     return Context_;
1637 }