Library.cpp

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