Library.cpp

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