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, const char *name, const char *types, sig::Type *&type) {
 344     if (name == NULL)
 345         return;
 346
 347     sqlite3_stmt *statement;
 348
 349     _sqlcall(sqlite3_prepare(Bridge_,
 350         "select "
 351             "\"bridge\".\"mode\", "
 352             "\"bridge\".\"value\" "
 353         "from \"bridge\" "
 354         "where"
 355             " \"bridge\".\"mode\" in (3, 4) and"
 356             " \"bridge\".\"name\" = ?"
 357         " limit 1"
 358     , -1, &statement, NULL));
 359
 360     _sqlcall(sqlite3_bind_text(statement, 1, name, -1, SQLITE_STATIC));
 361
 362     int mode;
 363     const char *value;
 364
 365     if (_sqlcall(sqlite3_step(statement)) == SQLITE_DONE) {
 366         mode = -1;
 367         value = NULL;
 368     } else {
 369         mode = sqlite3_column_int(statement, 0);
 370         value = sqlite3_column_pooled(pool, statement, 1);
 371     }
 372
 373     _sqlcall(sqlite3_finalize(statement));
 374
 375     switch (mode) {
 376         default:
 377             _assert(false);
 378         case -1:
 379             break;
 380
 381         case 3: {
 382             sig::Parse(pool, &type->data.signature, value, &Structor_);
 383         } break;
 384
 385         case 4: {
 386             sig::Signature signature;
 387             sig::Parse(pool, &signature, value, &Structor_);
 388             type = signature.elements[0].type;
 389         } break;
 390     }
 391 }
 392
 393 JSClassRef Type_privateData::Class_;
 394
 395 struct Pointer :
 396     CYOwned
 397 {
 398     Type_privateData *type_;
 399
 400     Pointer(void *value, JSContextRef context, JSObjectRef owner, sig::Type *type) :
 401         CYOwned(value, context, owner),
 402         type_(new(pool_) Type_privateData(type))
 403     {
 404     }
 405 };
 406
 407 struct Struct_privateData :
 408     CYOwned
 409 {
 410     Type_privateData *type_;
 411
 412     Struct_privateData(JSContextRef context, JSObjectRef owner) :
 413         CYOwned(NULL, context, owner)
 414     {
 415     }
 416 };
 417
 418 typedef std::map<const char *, Type_privateData *, CStringMapLess> TypeMap;
 419 static TypeMap Types_;
 420
 421 JSObjectRef CYMakeStruct(JSContextRef context, void *data, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 422     Struct_privateData *internal(new Struct_privateData(context, owner));
 423     apr_pool_t *pool(internal->pool_);
 424     Type_privateData *typical(new(pool) Type_privateData(type, ffi));
 425     internal->type_ = typical;
 426
 427     if (owner != NULL)
 428         internal->value_ = data;
 429     else {
 430         size_t size(typical->GetFFI()->size);
 431         void *copy(apr_palloc(internal->pool_, size));
 432         memcpy(copy, data, size);
 433         internal->value_ = copy;
 434     }
 435
 436     return JSObjectMake(context, Struct_, internal);
 437 }
 438
 439 JSValueRef CYCastJSValue(JSContextRef context, bool value) {
 440     return JSValueMakeBoolean(context, value);
 441 }
 442
 443 JSValueRef CYCastJSValue(JSContextRef context, double value) {
 444     return JSValueMakeNumber(context, value);
 445 }
 446
 447 #define CYCastJSValue_(Type_) \
 448     JSValueRef CYCastJSValue(JSContextRef context, Type_ value) { \
 449         return JSValueMakeNumber(context, static_cast<double>(value)); \
 450     }
 451
 452 CYCastJSValue_(int)
 453 CYCastJSValue_(unsigned int)
 454 CYCastJSValue_(long int)
 455 CYCastJSValue_(long unsigned int)
 456 CYCastJSValue_(long long int)
 457 CYCastJSValue_(long long unsigned int)
 458
 459 JSValueRef CYJSUndefined(JSContextRef context) {
 460     return JSValueMakeUndefined(context);
 461 }
 462
 463 double CYCastDouble(const char *value, size_t size) {
 464     char *end;
 465     double number(strtod(value, &end));
 466     if (end != value + size)
 467         return NAN;
 468     return number;
 469 }
 470
 471 double CYCastDouble(const char *value) {
 472     return CYCastDouble(value, strlen(value));
 473 }
 474
 475 double CYCastDouble(JSContextRef context, JSValueRef value) {
 476     JSValueRef exception(NULL);
 477     double number(JSValueToNumber(context, value, &exception));
 478     CYThrow(context, exception);
 479     return number;
 480 }
 481
 482 bool CYCastBool(JSContextRef context, JSValueRef value) {
 483     return JSValueToBoolean(context, value);
 484 }
 485
 486 JSValueRef CYJSNull(JSContextRef context) {
 487     return JSValueMakeNull(context);
 488 }
 489
 490 JSValueRef CYCastJSValue(JSContextRef context, JSStringRef value) {
 491     return value == NULL ? CYJSNull(context) : JSValueMakeString(context, value);
 492 }
 493
 494 JSValueRef CYCastJSValue(JSContextRef context, const char *value) {
 495     return CYCastJSValue(context, CYJSString(value));
 496 }
 497
 498 JSObjectRef CYCastJSObject(JSContextRef context, JSValueRef value) {
 499     JSValueRef exception(NULL);
 500     JSObjectRef object(JSValueToObject(context, value, &exception));
 501     CYThrow(context, exception);
 502     return object;
 503 }
 504
 505 JSValueRef CYCallAsFunction(JSContextRef context, JSObjectRef function, JSObjectRef _this, size_t count, JSValueRef arguments[]) {
 506     JSValueRef exception(NULL);
 507     JSValueRef value(JSObjectCallAsFunction(context, function, _this, count, arguments, &exception));
 508     CYThrow(context, exception);
 509     return value;
 510 }
 511
 512 bool CYIsCallable(JSContextRef context, JSValueRef value) {
 513     return value != NULL && JSValueIsObject(context, value) && JSObjectIsFunction(context, (JSObjectRef) value);
 514 }
 515
 516 static JSValueRef System_print(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 517     if (count == 0)
 518         printf("\n");
 519     else {
 520         CYPool pool;
 521         printf("%s\n", CYPoolCString(pool, context, arguments[0]));
 522     }
 523
 524     return CYJSUndefined(context);
 525 } CYCatch }
 526
 527 static size_t Nonce_(0);
 528
 529 static JSValueRef $cyq(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 530     CYPool pool;
 531     const char *name(apr_psprintf(pool, "%s%zu", CYPoolCString(pool, context, arguments[0]), Nonce_++));
 532     return CYCastJSValue(context, name);
 533 }
 534
 535 static JSValueRef Cycript_gc_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 536     JSGarbageCollect(context);
 537     return CYJSUndefined(context);
 538 }
 539
 540 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSValueRef value, JSValueRef *exception) { CYTry {
 541     switch (JSType type = JSValueGetType(context, value)) {
 542         case kJSTypeUndefined:
 543             return "undefined";
 544         case kJSTypeNull:
 545             return "null";
 546         case kJSTypeBoolean:
 547             return CYCastBool(context, value) ? "true" : "false";
 548
 549         case kJSTypeNumber: {
 550             std::ostringstream str;
 551             CYNumerify(str, CYCastDouble(context, value));
 552             std::string value(str.str());
 553             return apr_pstrmemdup(pool, value.c_str(), value.size());
 554         } break;
 555
 556         case kJSTypeString: {
 557             std::ostringstream str;
 558             CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, value)));
 559             CYStringify(str, string.data, string.size);
 560             std::string value(str.str());
 561             return apr_pstrmemdup(pool, value.c_str(), value.size());
 562         } break;
 563
 564         case kJSTypeObject:
 565             return CYPoolCCYON(pool, context, (JSObjectRef) value);
 566         default:
 567             throw CYJSError(context, "JSValueGetType() == 0x%x", type);
 568     }
 569 } CYCatch }
 570
 571 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSValueRef value) {
 572     JSValueRef exception(NULL);
 573     const char *cyon(CYPoolCCYON(pool, context, value, &exception));
 574     CYThrow(context, exception);
 575     return cyon;
 576 }
 577
 578 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSObjectRef object) {
 579     JSValueRef toCYON(CYGetProperty(context, object, toCYON_));
 580     if (CYIsCallable(context, toCYON)) {
 581         JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toCYON, object, 0, NULL));
 582         return CYPoolCString(pool, context, value);
 583     }
 584
 585     JSValueRef toJSON(CYGetProperty(context, object, toJSON_));
 586     if (CYIsCallable(context, toJSON)) {
 587         JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 588         JSValueRef exception(NULL);
 589         const char *cyon(CYPoolCCYON(pool, context, CYCallAsFunction(context, (JSObjectRef) toJSON, object, 1, arguments), &exception));
 590         CYThrow(context, exception);
 591         return cyon;
 592     }
 593
 594     std::ostringstream str;
 595
 596     str << '{';
 597
 598     // XXX: this is, sadly, going to leak
 599     JSPropertyNameArrayRef names(JSObjectCopyPropertyNames(context, object));
 600
 601     bool comma(false);
 602
 603     for (size_t index(0), count(JSPropertyNameArrayGetCount(names)); index != count; ++index) {
 604         JSStringRef name(JSPropertyNameArrayGetNameAtIndex(names, index));
 605         JSValueRef value(CYGetProperty(context, object, name));
 606
 607         if (comma)
 608             str << ',';
 609         else
 610             comma = true;
 611
 612         CYUTF8String string(CYPoolUTF8String(pool, context, name));
 613         if (CYIsKey(string))
 614             str << string.data;
 615         else
 616             CYStringify(str, string.data, string.size);
 617
 618         str << ':' << CYPoolCCYON(pool, context, value);
 619     }
 620
 621     str << '}';
 622
 623     JSPropertyNameArrayRelease(names);
 624
 625     std::string string(str.str());
 626     return apr_pstrmemdup(pool, string.c_str(), string.size());
 627 }
 628
 629 static JSValueRef Array_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 630     CYPool pool;
 631     std::ostringstream str;
 632
 633     str << '[';
 634
 635     JSValueRef length(CYGetProperty(context, _this, length_));
 636     bool comma(false);
 637
 638     for (size_t index(0), count(CYCastDouble(context, length)); index != count; ++index) {
 639         JSValueRef value(CYGetProperty(context, _this, index));
 640
 641         if (comma)
 642             str << ',';
 643         else
 644             comma = true;
 645
 646         if (!JSValueIsUndefined(context, value))
 647             str << CYPoolCCYON(pool, context, value);
 648         else {
 649             str << ',';
 650             comma = false;
 651         }
 652     }
 653
 654     str << ']';
 655
 656     std::string value(str.str());
 657     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 658 } CYCatch }
 659
 660 JSObjectRef CYMakePointer(JSContextRef context, void *pointer, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 661     Pointer *internal(new Pointer(pointer, context, owner, type));
 662     return JSObjectMake(context, Pointer_, internal);
 663 }
 664
 665 static JSObjectRef CYMakeFunctor(JSContextRef context, void (*function)(), const char *type) {
 666     cy::Functor *internal(new cy::Functor(type, function));
 667     return JSObjectMake(context, Functor_, internal);
 668 }
 669
 670 static bool CYGetOffset(apr_pool_t *pool, JSContextRef context, JSStringRef value, ssize_t &index) {
 671     return CYGetOffset(CYPoolCString(pool, context, value), index);
 672 }
 673
 674 void *CYCastPointer_(JSContextRef context, JSValueRef value) {
 675     switch (JSValueGetType(context, value)) {
 676         case kJSTypeNull:
 677             return NULL;
 678         /*case kJSTypeObject:
 679             if (JSValueIsObjectOfClass(context, value, Pointer_)) {
 680                 Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate((JSObjectRef) value)));
 681                 return internal->value_;
 682             }*/
 683         default:
 684             double number(CYCastDouble(context, value));
 685             if (std::isnan(number))
 686                 throw CYJSError(context, "cannot convert value to pointer");
 687             return reinterpret_cast<void *>(static_cast<uintptr_t>(static_cast<long long>(number)));
 688     }
 689 }
 690
 691 void CYPoolFFI(apr_pool_t *pool, JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, JSValueRef value) {
 692     switch (type->primitive) {
 693         case sig::boolean_P:
 694             *reinterpret_cast<bool *>(data) = JSValueToBoolean(context, value);
 695         break;
 696
 697 #define CYPoolFFI_(primitive, native) \
 698         case sig::primitive ## _P: \
 699             *reinterpret_cast<native *>(data) = CYCastDouble(context, value); \
 700         break;
 701
 702         CYPoolFFI_(uchar, unsigned char)
 703         CYPoolFFI_(char, char)
 704         CYPoolFFI_(ushort, unsigned short)
 705         CYPoolFFI_(short, short)
 706         CYPoolFFI_(ulong, unsigned long)
 707         CYPoolFFI_(long, long)
 708         CYPoolFFI_(uint, unsigned int)
 709         CYPoolFFI_(int, int)
 710         CYPoolFFI_(ulonglong, unsigned long long)
 711         CYPoolFFI_(longlong, long long)
 712         CYPoolFFI_(float, float)
 713         CYPoolFFI_(double, double)
 714
 715         case sig::pointer_P:
 716             *reinterpret_cast<void **>(data) = CYCastPointer<void *>(context, value);
 717         break;
 718
 719         case sig::string_P:
 720             *reinterpret_cast<const char **>(data) = CYPoolCString(pool, context, value);
 721         break;
 722
 723         case sig::struct_P: {
 724             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 725             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 726             for (size_t index(0); index != type->data.signature.count; ++index) {
 727                 sig::Element *element(&type->data.signature.elements[index]);
 728                 ffi_type *field(ffi->elements[index]);
 729
 730                 JSValueRef rhs;
 731                 if (aggregate == NULL)
 732                     rhs = value;
 733                 else {
 734                     rhs = CYGetProperty(context, aggregate, index);
 735                     if (JSValueIsUndefined(context, rhs)) {
 736                         if (element->name != NULL)
 737                             rhs = CYGetProperty(context, aggregate, CYJSString(element->name));
 738                         else
 739                             goto undefined;
 740                         if (JSValueIsUndefined(context, rhs)) undefined:
 741                             throw CYJSError(context, "unable to extract structure value");
 742                     }
 743                 }
 744
 745                 CYPoolFFI(pool, context, element->type, field, base, rhs);
 746                 // XXX: alignment?
 747                 base += field->size;
 748             }
 749         } break;
 750
 751         case sig::void_P:
 752         break;
 753
 754         default:
 755             if (hooks_ != NULL && hooks_->PoolFFI != NULL)
 756                 if ((*hooks_->PoolFFI)(pool, context, type, ffi, data, value))
 757                     return;
 758
 759             fprintf(stderr, "CYPoolFFI(%c)\n", type->primitive);
 760             _assert(false);
 761     }
 762 }
 763
 764 JSValueRef CYFromFFI(JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, bool initialize, JSObjectRef owner) {
 765     switch (type->primitive) {
 766         case sig::boolean_P:
 767             return CYCastJSValue(context, *reinterpret_cast<bool *>(data));
 768
 769 #define CYFromFFI_(primitive, native) \
 770         case sig::primitive ## _P: \
 771             return CYCastJSValue(context, *reinterpret_cast<native *>(data)); \
 772
 773         CYFromFFI_(uchar, unsigned char)
 774         CYFromFFI_(char, char)
 775         CYFromFFI_(ushort, unsigned short)
 776         CYFromFFI_(short, short)
 777         CYFromFFI_(ulong, unsigned long)
 778         CYFromFFI_(long, long)
 779         CYFromFFI_(uint, unsigned int)
 780         CYFromFFI_(int, int)
 781         CYFromFFI_(ulonglong, unsigned long long)
 782         CYFromFFI_(longlong, long long)
 783         CYFromFFI_(float, float)
 784         CYFromFFI_(double, double)
 785
 786         case sig::pointer_P:
 787             if (void *pointer = *reinterpret_cast<void **>(data))
 788                 return CYMakePointer(context, pointer, type->data.data.type, ffi, owner);
 789             else goto null;
 790
 791         case sig::string_P:
 792             if (char *utf8 = *reinterpret_cast<char **>(data))
 793                 return CYCastJSValue(context, utf8);
 794             else goto null;
 795
 796         case sig::struct_P:
 797             return CYMakeStruct(context, data, type, ffi, owner);
 798         case sig::void_P:
 799             return CYJSUndefined(context);
 800
 801         null:
 802             return CYJSNull(context);
 803         default:
 804             if (hooks_ != NULL && hooks_->FromFFI != NULL)
 805                 if (JSValueRef value = (*hooks_->FromFFI)(context, type, ffi, data, initialize, owner))
 806                     return value;
 807
 808             fprintf(stderr, "CYFromFFI(%c)\n", type->primitive);
 809             _assert(false);
 810     }
 811 }
 812
 813 static void FunctionClosure_(ffi_cif *cif, void *result, void **arguments, void *arg) {
 814     Closure_privateData *internal(reinterpret_cast<Closure_privateData *>(arg));
 815
 816     JSContextRef context(internal->context_);
 817
 818     size_t count(internal->cif_.nargs);
 819     JSValueRef values[count];
 820
 821     for (size_t index(0); index != count; ++index)
 822         values[index] = CYFromFFI(context, internal->signature_.elements[1 + index].type, internal->cif_.arg_types[index], arguments[index]);
 823
 824     JSValueRef value(CYCallAsFunction(context, internal->function_, NULL, count, values));
 825     CYPoolFFI(NULL, context, internal->signature_.elements[0].type, internal->cif_.rtype, result, value);
 826 }
 827
 828 Closure_privateData *CYMakeFunctor_(JSContextRef context, JSObjectRef function, const char *type, void (*callback)(ffi_cif *, void *, void **, void *)) {
 829     // XXX: in case of exceptions this will leak
 830     // XXX: in point of fact, this may /need/ to leak :(
 831     Closure_privateData *internal(new Closure_privateData(CYGetJSContext(), function, type));
 832
 833     ffi_closure *closure((ffi_closure *) _syscall(mmap(
 834         NULL, sizeof(ffi_closure),
 835         PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE,
 836         -1, 0
 837     )));
 838
 839     ffi_status status(ffi_prep_closure(closure, &internal->cif_, callback, internal));
 840     _assert(status == FFI_OK);
 841
 842     _syscall(mprotect(closure, sizeof(*closure), PROT_READ | PROT_EXEC));
 843
 844     internal->value_ = closure;
 845
 846     return internal;
 847 }
 848
 849 static JSObjectRef CYMakeFunctor(JSContextRef context, JSObjectRef function, const char *type) {
 850     Closure_privateData *internal(CYMakeFunctor_(context, function, type, &FunctionClosure_));
 851     return JSObjectMake(context, Functor_, internal);
 852 }
 853
 854 static JSObjectRef CYMakeFunctor(JSContextRef context, JSValueRef value, const char *type) {
 855     JSValueRef exception(NULL);
 856     bool function(JSValueIsInstanceOfConstructor(context, value, Function_, &exception));
 857     CYThrow(context, exception);
 858
 859     if (function) {
 860         JSObjectRef function(CYCastJSObject(context, value));
 861         return CYMakeFunctor(context, function, type);
 862     } else {
 863         void (*function)()(CYCastPointer<void (*)()>(context, value));
 864         return CYMakeFunctor(context, function, type);
 865     }
 866 }
 867
 868 static bool Index_(apr_pool_t *pool, JSContextRef context, Struct_privateData *internal, JSStringRef property, ssize_t &index, uint8_t *&base) {
 869     Type_privateData *typical(internal->type_);
 870     sig::Type *type(typical->type_);
 871     if (type == NULL)
 872         return false;
 873
 874     const char *name(CYPoolCString(pool, context, property));
 875     size_t length(strlen(name));
 876     double number(CYCastDouble(name, length));
 877
 878     size_t count(type->data.signature.count);
 879
 880     if (std::isnan(number)) {
 881         if (property == NULL)
 882             return false;
 883
 884         sig::Element *elements(type->data.signature.elements);
 885
 886         for (size_t local(0); local != count; ++local) {
 887             sig::Element *element(&elements[local]);
 888             if (element->name != NULL && strcmp(name, element->name) == 0) {
 889                 index = local;
 890                 goto base;
 891             }
 892         }
 893
 894         return false;
 895     } else {
 896         index = static_cast<ssize_t>(number);
 897         if (index != number || index < 0 || static_cast<size_t>(index) >= count)
 898             return false;
 899     }
 900
 901   base:
 902     ffi_type **elements(typical->GetFFI()->elements);
 903
 904     base = reinterpret_cast<uint8_t *>(internal->value_);
 905     for (ssize_t local(0); local != index; ++local)
 906         base += elements[local]->size;
 907
 908     return true;
 909 }
 910
 911 static JSValueRef Pointer_getIndex(JSContextRef context, JSObjectRef object, size_t index, JSValueRef *exception) { CYTry {
 912     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 913     Type_privateData *typical(internal->type_);
 914
 915     ffi_type *ffi(typical->GetFFI());
 916
 917     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 918     base += ffi->size * index;
 919
 920     JSObjectRef owner(internal->GetOwner() ?: object);
 921     return CYFromFFI(context, typical->type_, ffi, base, false, owner);
 922 } CYCatch }
 923
 924 static JSValueRef Pointer_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) {
 925     CYPool pool;
 926     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 927     Type_privateData *typical(internal->type_);
 928
 929     if (typical->type_ == NULL)
 930         return NULL;
 931
 932     ssize_t offset;
 933     if (!CYGetOffset(pool, context, property, offset))
 934         return NULL;
 935
 936     return Pointer_getIndex(context, object, offset, exception);
 937 }
 938
 939 static JSValueRef Pointer_getProperty_$cyi(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) {
 940     return Pointer_getIndex(context, object, 0, exception);
 941 }
 942
 943 static bool Pointer_setIndex(JSContextRef context, JSObjectRef object, size_t index, JSValueRef value, JSValueRef *exception) { CYTry {
 944     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 945     Type_privateData *typical(internal->type_);
 946
 947     ffi_type *ffi(typical->GetFFI());
 948
 949     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 950     base += ffi->size * index;
 951
 952     CYPoolFFI(NULL, context, typical->type_, ffi, base, value);
 953     return true;
 954 } CYCatch }
 955
 956 static bool Pointer_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) {
 957     CYPool pool;
 958     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 959     Type_privateData *typical(internal->type_);
 960
 961     if (typical->type_ == NULL)
 962         return NULL;
 963
 964     ssize_t offset;
 965     if (!CYGetOffset(pool, context, property, offset))
 966         return NULL;
 967
 968     return Pointer_setIndex(context, object, offset, value, exception);
 969 }
 970
 971 static bool Pointer_setProperty_$cyi(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) {
 972     return Pointer_setIndex(context, object, 0, value, exception);
 973 }
 974
 975 static JSValueRef Struct_callAsFunction_$cya(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 976     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(_this)));
 977     Type_privateData *typical(internal->type_);
 978     return CYMakePointer(context, internal->value_, typical->type_, typical->ffi_, _this);
 979 }
 980
 981 static JSValueRef Struct_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 982     CYPool pool;
 983     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 984     Type_privateData *typical(internal->type_);
 985
 986     ssize_t index;
 987     uint8_t *base;
 988
 989     if (!Index_(pool, context, internal, property, index, base))
 990         return NULL;
 991
 992     JSObjectRef owner(internal->GetOwner() ?: object);
 993
 994     return CYFromFFI(context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, false, owner);
 995 } CYCatch }
 996
 997 static bool Struct_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 998     CYPool pool;
 999     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
1000     Type_privateData *typical(internal->type_);
1001
1002     ssize_t index;
1003     uint8_t *base;
1004
1005     if (!Index_(pool, context, internal, property, index, base))
1006         return false;
1007
1008     CYPoolFFI(NULL, context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, value);
1009     return true;
1010 } CYCatch }
1011
1012 static void Struct_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
1013     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
1014     Type_privateData *typical(internal->type_);
1015     sig::Type *type(typical->type_);
1016
1017     if (type == NULL)
1018         return;
1019
1020     size_t count(type->data.signature.count);
1021     sig::Element *elements(type->data.signature.elements);
1022
1023     char number[32];
1024
1025     for (size_t index(0); index != count; ++index) {
1026         const char *name;
1027         name = elements[index].name;
1028
1029         if (name == NULL) {
1030             sprintf(number, "%zu", index);
1031             name = number;
1032         }
1033
1034         JSPropertyNameAccumulatorAddName(names, CYJSString(name));
1035     }
1036 }
1037
1038 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 {
1039     if (setups + count != signature->count - 1)
1040         throw CYJSError(context, "incorrect number of arguments to ffi function");
1041
1042     size_t size(setups + count);
1043     void *values[size];
1044     memcpy(values, setup, sizeof(void *) * setups);
1045
1046     for (size_t index(setups); index != size; ++index) {
1047         sig::Element *element(&signature->elements[index + 1]);
1048         ffi_type *ffi(cif->arg_types[index]);
1049         // XXX: alignment?
1050         values[index] = new(pool) uint8_t[ffi->size];
1051         CYPoolFFI(pool, context, element->type, ffi, values[index], arguments[index - setups]);
1052     }
1053
1054     uint8_t value[cif->rtype->size];
1055
1056     if (hooks_ != NULL && hooks_->CallFunction != NULL)
1057         (*hooks_->CallFunction)(context, cif, function, value, values);
1058     else
1059         ffi_call(cif, function, value, values);
1060
1061     return CYFromFFI(context, signature->elements[0].type, cif->rtype, value, initialize);
1062 } CYCatch }
1063
1064 static JSValueRef Functor_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1065     CYPool pool;
1066     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
1067     return CYCallFunction(pool, context, 0, NULL, count, arguments, false, exception, &internal->signature_, &internal->cif_, internal->GetValue());
1068 }
1069
1070 static JSObjectRef CYMakeType(JSContextRef context, const char *type) {
1071     Type_privateData *internal(new Type_privateData(NULL, type));
1072     return JSObjectMake(context, Type_privateData::Class_, internal);
1073 }
1074
1075 static JSObjectRef CYMakeType(JSContextRef context, sig::Type *type) {
1076     Type_privateData *internal(new Type_privateData(type));
1077     return JSObjectMake(context, Type_privateData::Class_, internal);
1078 }
1079
1080 static void *CYCastSymbol(const char *name) {
1081     return dlsym(RTLD_DEFAULT, name);
1082 }
1083
1084 static JSValueRef Runtime_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1085     CYPool pool;
1086     CYUTF8String name(CYPoolUTF8String(pool, context, property));
1087
1088     if (hooks_ != NULL && hooks_->RuntimeProperty != NULL)
1089         if (JSValueRef value = (*hooks_->RuntimeProperty)(context, name))
1090             return value;
1091
1092     sqlite3_stmt *statement;
1093
1094     _sqlcall(sqlite3_prepare(Bridge_,
1095         "select "
1096             "\"bridge\".\"mode\", "
1097             "\"bridge\".\"value\" "
1098         "from \"bridge\" "
1099         "where"
1100             " \"bridge\".\"name\" = ?"
1101         " limit 1"
1102     , -1, &statement, NULL));
1103
1104     _sqlcall(sqlite3_bind_text(statement, 1, name.data, name.size, SQLITE_STATIC));
1105
1106     int mode;
1107     const char *value;
1108
1109     if (_sqlcall(sqlite3_step(statement)) == SQLITE_DONE) {
1110         mode = -1;
1111         value = NULL;
1112     } else {
1113         mode = sqlite3_column_int(statement, 0);
1114         value = sqlite3_column_pooled(pool, statement, 1);
1115     }
1116
1117     _sqlcall(sqlite3_finalize(statement));
1118
1119     switch (mode) {
1120         default:
1121             _assert(false);
1122         case -1:
1123             return NULL;
1124
1125         case 0:
1126             return JSEvaluateScript(CYGetJSContext(), CYJSString(value), NULL, NULL, 0, NULL);
1127
1128         case 1:
1129             if (void (*symbol)() = reinterpret_cast<void (*)()>(CYCastSymbol(name.data)))
1130                 return CYMakeFunctor(context, symbol, value);
1131             else return NULL;
1132
1133         case 2:
1134             if (void *symbol = CYCastSymbol(name.data)) {
1135                 // XXX: this is horrendously inefficient
1136                 sig::Signature signature;
1137                 sig::Parse(pool, &signature, value, &Structor_);
1138                 ffi_cif cif;
1139                 sig::sig_ffi_cif(pool, &sig::ObjectiveC, &signature, &cif);
1140                 return CYFromFFI(context, signature.elements[0].type, cif.rtype, symbol);
1141             } else return NULL;
1142
1143         // XXX: implement case 3
1144         case 4:
1145             return CYMakeType(context, value);
1146     }
1147 } CYCatch }
1148
1149 static JSObjectRef Pointer_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1150     if (count != 2)
1151         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1152
1153     CYPool pool;
1154
1155     void *value(CYCastPointer<void *>(context, arguments[0]));
1156     const char *type(CYPoolCString(pool, context, arguments[1]));
1157
1158     sig::Signature signature;
1159     sig::Parse(pool, &signature, type, &Structor_);
1160
1161     return CYMakePointer(context, value, signature.elements[0].type, NULL, NULL);
1162 } CYCatch }
1163
1164 static JSObjectRef Type_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1165     if (count != 1)
1166         throw CYJSError(context, "incorrect number of arguments to Type constructor");
1167     CYPool pool;
1168     const char *type(CYPoolCString(pool, context, arguments[0]));
1169     return CYMakeType(context, type);
1170 } CYCatch }
1171
1172 static JSValueRef Type_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1173     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1174
1175     sig::Type type;
1176
1177     if (JSStringIsEqualToUTF8CString(property, "$cyi")) {
1178         type.primitive = sig::pointer_P;
1179         type.data.data.size = 0;
1180     } else {
1181         CYPool pool;
1182         size_t index(CYGetIndex(pool, context, property));
1183         if (index == _not(size_t))
1184             return NULL;
1185         type.primitive = sig::array_P;
1186         type.data.data.size = index;
1187     }
1188
1189     type.name = NULL;
1190     type.flags = 0;
1191
1192     type.data.data.type = internal->type_;
1193
1194     return CYMakeType(context, &type);
1195 } CYCatch }
1196
1197 static JSValueRef Type_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1198     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1199
1200     if (count != 1)
1201         throw CYJSError(context, "incorrect number of arguments to type cast function");
1202     sig::Type *type(internal->type_);
1203     ffi_type *ffi(internal->GetFFI());
1204     // XXX: alignment?
1205     uint8_t value[ffi->size];
1206     CYPool pool;
1207     CYPoolFFI(pool, context, type, ffi, value, arguments[0]);
1208     return CYFromFFI(context, type, ffi, value);
1209 } CYCatch }
1210
1211 static JSObjectRef Type_callAsConstructor(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1212     if (count != 0)
1213         throw CYJSError(context, "incorrect number of arguments to type cast function");
1214     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1215
1216     sig::Type *type(internal->type_);
1217     size_t size;
1218
1219     if (type->primitive != sig::array_P)
1220         size = 0;
1221     else {
1222         size = type->data.data.size;
1223         type = type->data.data.type;
1224     }
1225
1226     void *value(malloc(internal->GetFFI()->size));
1227     return CYMakePointer(context, value, type, NULL, NULL);
1228 } CYCatch }
1229
1230 static JSObjectRef Functor_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1231     if (count != 2)
1232         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1233     CYPool pool;
1234     const char *type(CYPoolCString(pool, context, arguments[1]));
1235     return CYMakeFunctor(context, arguments[0], type);
1236 } CYCatch }
1237
1238 static JSValueRef CYValue_callAsFunction_valueOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1239     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1240     return CYCastJSValue(context, reinterpret_cast<uintptr_t>(internal->value_));
1241 } CYCatch }
1242
1243 static JSValueRef CYValue_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1244     return CYValue_callAsFunction_valueOf(context, object, _this, count, arguments, exception);
1245 }
1246
1247 static JSValueRef CYValue_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1248 CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1249     char string[32];
1250     sprintf(string, "%p", internal->value_);
1251
1252     return CYCastJSValue(context, string);
1253 } CYCatch }
1254
1255 static JSValueRef Type_callAsFunction_toString(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1256     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1257     CYPool pool;
1258     const char *type(sig::Unparse(pool, internal->type_));
1259     return CYCastJSValue(context, CYJSString(type));
1260 } CYCatch }
1261
1262 static JSValueRef Type_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1263     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1264     CYPool pool;
1265     const char *type(sig::Unparse(pool, internal->type_));
1266     size_t size(strlen(type));
1267     char *cyon(new(pool) char[12 + size + 1]);
1268     memcpy(cyon, "new Type(\"", 10);
1269     cyon[12 + size] = '\0';
1270     cyon[12 + size - 2] = '"';
1271     cyon[12 + size - 1] = ')';
1272     memcpy(cyon + 10, type, size);
1273     return CYCastJSValue(context, CYJSString(cyon));
1274 } CYCatch }
1275
1276 static JSValueRef Type_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1277     return Type_callAsFunction_toString(context, object, _this, count, arguments, exception);
1278 }
1279
1280 static JSStaticValue Pointer_staticValues[2] = {
1281     {"$cyi", &Pointer_getProperty_$cyi, &Pointer_setProperty_$cyi, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1282     {NULL, NULL, NULL, 0}
1283 };
1284
1285 static JSStaticFunction Pointer_staticFunctions[4] = {
1286     {"toCYON", &CYValue_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1287     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1288     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1289     {NULL, NULL, 0}
1290 };
1291
1292 static JSStaticFunction Struct_staticFunctions[2] = {
1293     {"$cya", &Struct_callAsFunction_$cya, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1294     {NULL, NULL, 0}
1295 };
1296
1297 static JSStaticFunction Functor_staticFunctions[4] = {
1298     {"toCYON", &CYValue_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1299     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1300     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1301     {NULL, NULL, 0}
1302 };
1303
1304 namespace cy {
1305     JSStaticFunction const * const Functor::StaticFunctions = Functor_staticFunctions;
1306 }
1307
1308 static JSStaticFunction Type_staticFunctions[4] = {
1309     {"toCYON", &Type_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1310     {"toJSON", &Type_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1311     {"toString", &Type_callAsFunction_toString, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1312     {NULL, NULL, 0}
1313 };
1314
1315 static JSObjectRef (*JSObjectMakeArray$)(JSContextRef, size_t, const JSValueRef[], JSValueRef *);
1316
1317 void CYSetArgs(int argc, const char *argv[]) {
1318     JSContextRef context(CYGetJSContext());
1319     JSValueRef args[argc];
1320     for (int i(0); i != argc; ++i)
1321         args[i] = CYCastJSValue(context, argv[i]);
1322
1323     JSObjectRef array;
1324     if (JSObjectMakeArray$ != NULL) {
1325         JSValueRef exception(NULL);
1326         array = (*JSObjectMakeArray$)(context, argc, args, &exception);
1327         CYThrow(context, exception);
1328     } else {
1329         JSValueRef value(CYCallAsFunction(context, Array_, NULL, argc, args));
1330         array = CYCastJSObject(context, value);
1331     }
1332
1333     CYSetProperty(context, System_, CYJSString("args"), array);
1334 }
1335
1336 JSObjectRef CYGetGlobalObject(JSContextRef context) {
1337     return JSContextGetGlobalObject(context);
1338 }
1339
1340 const char *CYExecute(apr_pool_t *pool, const char *code) {
1341     JSContextRef context(CYGetJSContext());
1342     JSValueRef exception(NULL), result;
1343
1344     void *handle;
1345     if (hooks_ != NULL && hooks_->ExecuteStart != NULL)
1346         handle = (*hooks_->ExecuteStart)(context);
1347     else
1348         handle = NULL;
1349
1350     const char *json;
1351
1352     try {
1353         result = JSEvaluateScript(context, CYJSString(code), NULL, NULL, 0, &exception);
1354     } catch (const char *error) {
1355         return error;
1356     }
1357
1358     if (exception != NULL) { error:
1359         result = exception;
1360         exception = NULL;
1361     }
1362
1363     if (JSValueIsUndefined(context, result))
1364         return NULL;
1365
1366     try {
1367         json = CYPoolCCYON(pool, context, result, &exception);
1368     } catch (const char *error) {
1369         return error;
1370     }
1371
1372     if (exception != NULL)
1373         goto error;
1374
1375     CYSetProperty(context, CYGetGlobalObject(context), Result_, result);
1376
1377     if (hooks_ != NULL && hooks_->ExecuteEnd != NULL)
1378         (*hooks_->ExecuteEnd)(context, handle);
1379     return json;
1380 }
1381
1382 static apr_pool_t *Pool_;
1383
1384 static bool initialized_;
1385
1386 void CYInitialize() {
1387     if (!initialized_)
1388         initialized_ = true;
1389     else return;
1390
1391     _aprcall(apr_initialize());
1392     _aprcall(apr_pool_create(&Pool_, NULL));
1393     _sqlcall(sqlite3_open("/usr/lib/libcycript.db", &Bridge_));
1394
1395     JSObjectMakeArray$ = reinterpret_cast<JSObjectRef (*)(JSContextRef, size_t, const JSValueRef[], JSValueRef *)>(dlsym(RTLD_DEFAULT, "JSObjectMakeArray"));
1396 }
1397
1398 apr_pool_t *CYGetGlobalPool() {
1399     CYInitialize();
1400     return Pool_;
1401 }
1402
1403 void CYThrow(JSContextRef context, JSValueRef value) {
1404     if (value != NULL)
1405         throw CYJSError(context, value);
1406 }
1407
1408 const char *CYJSError::PoolCString(apr_pool_t *pool) const {
1409     return CYPoolCString(pool, context_, value_);
1410 }
1411
1412 JSValueRef CYJSError::CastJSValue(JSContextRef context) const {
1413     // XXX: what if the context is different?
1414     return value_;
1415 }
1416
1417 void CYThrow(const char *format, ...) {
1418     va_list args;
1419     va_start (args, format);
1420     throw CYPoolError(format, args);
1421     // XXX: does this matter? :(
1422     va_end (args);
1423 }
1424
1425 const char *CYPoolError::PoolCString(apr_pool_t *pool) const {
1426     return apr_pstrdup(pool, message_);
1427 }
1428
1429 CYPoolError::CYPoolError(const char *format, ...) {
1430     va_list args;
1431     va_start (args, format);
1432     message_ = apr_pvsprintf(pool_, format, args);
1433     va_end (args);
1434 }
1435
1436 CYPoolError::CYPoolError(const char *format, va_list args) {
1437     message_ = apr_pvsprintf(pool_, format, args);
1438 }
1439
1440 JSValueRef CYPoolError::CastJSValue(JSContextRef context) const {
1441     return CYCastJSValue(context, message_);
1442 }
1443
1444 CYJSError::CYJSError(JSContextRef context, const char *format, ...) {
1445     if (context == NULL)
1446         context = CYGetJSContext();
1447
1448     CYPool pool;
1449
1450     va_list args;
1451     va_start (args, format);
1452     const char *message(apr_pvsprintf(pool, format, args));
1453     va_end (args);
1454
1455     JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(message))};
1456
1457     JSValueRef exception(NULL);
1458     value_ = JSObjectCallAsConstructor(context, Error_, 1, arguments, &exception);
1459     CYThrow(context, exception);
1460 }
1461
1462 JSGlobalContextRef CYGetJSContext() {
1463     CYInitialize();
1464
1465     if (Context_ == NULL) {
1466         JSClassDefinition definition;
1467
1468         definition = kJSClassDefinitionEmpty;
1469         definition.className = "Functor";
1470         definition.staticFunctions = cy::Functor::StaticFunctions;
1471         definition.callAsFunction = &Functor_callAsFunction;
1472         definition.finalize = &CYFinalize;
1473         Functor_ = JSClassCreate(&definition);
1474
1475         definition = kJSClassDefinitionEmpty;
1476         definition.className = "Pointer";
1477         definition.staticValues = Pointer_staticValues;
1478         definition.staticFunctions = Pointer_staticFunctions;
1479         definition.getProperty = &Pointer_getProperty;
1480         definition.setProperty = &Pointer_setProperty;
1481         definition.finalize = &CYFinalize;
1482         Pointer_ = JSClassCreate(&definition);
1483
1484         definition = kJSClassDefinitionEmpty;
1485         definition.className = "Struct";
1486         definition.staticFunctions = Struct_staticFunctions;
1487         definition.getProperty = &Struct_getProperty;
1488         definition.setProperty = &Struct_setProperty;
1489         definition.getPropertyNames = &Struct_getPropertyNames;
1490         definition.finalize = &CYFinalize;
1491         Struct_ = JSClassCreate(&definition);
1492
1493         definition = kJSClassDefinitionEmpty;
1494         definition.className = "Type";
1495         definition.staticFunctions = Type_staticFunctions;
1496         definition.getProperty = &Type_getProperty;
1497         definition.callAsFunction = &Type_callAsFunction;
1498         definition.callAsConstructor = &Type_callAsConstructor;
1499         definition.finalize = &CYFinalize;
1500         Type_privateData::Class_ = JSClassCreate(&definition);
1501
1502         definition = kJSClassDefinitionEmpty;
1503         definition.className = "Runtime";
1504         definition.getProperty = &Runtime_getProperty;
1505         Runtime_ = JSClassCreate(&definition);
1506
1507         definition = kJSClassDefinitionEmpty;
1508         //definition.getProperty = &Global_getProperty;
1509         JSClassRef Global(JSClassCreate(&definition));
1510
1511         JSGlobalContextRef context(JSGlobalContextCreate(Global));
1512         Context_ = context;
1513         JSObjectRef global(CYGetGlobalObject(context));
1514
1515         JSObjectSetPrototype(context, global, JSObjectMake(context, Runtime_, NULL));
1516
1517         Array_ = CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Array")));
1518         JSValueProtect(context, Array_);
1519
1520         Error_ = CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Error")));
1521         JSValueProtect(context, Error_);
1522
1523         Function_ = CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Function")));
1524         JSValueProtect(context, Function_);
1525
1526         String_ = CYCastJSObject(context, CYGetProperty(context, global, CYJSString("String")));
1527         JSValueProtect(context, String_);
1528
1529         length_ = JSStringCreateWithUTF8CString("length");
1530         message_ = JSStringCreateWithUTF8CString("message");
1531         name_ = JSStringCreateWithUTF8CString("name");
1532         prototype_ = JSStringCreateWithUTF8CString("prototype");
1533         toCYON_ = JSStringCreateWithUTF8CString("toCYON");
1534         toJSON_ = JSStringCreateWithUTF8CString("toJSON");
1535
1536         JSObjectRef Object(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Object"))));
1537         Object_prototype_ = CYCastJSObject(context, CYGetProperty(context, Object, prototype_));
1538         JSValueProtect(context, Object_prototype_);
1539
1540         Array_prototype_ = CYCastJSObject(context, CYGetProperty(context, Array_, prototype_));
1541         Array_pop_ = CYCastJSObject(context, CYGetProperty(context, Array_prototype_, CYJSString("pop")));
1542         Array_push_ = CYCastJSObject(context, CYGetProperty(context, Array_prototype_, CYJSString("push")));
1543         Array_splice_ = CYCastJSObject(context, CYGetProperty(context, Array_prototype_, CYJSString("splice")));
1544
1545         CYSetProperty(context, Array_prototype_, toCYON_, JSObjectMakeFunctionWithCallback(context, toCYON_, &Array_callAsFunction_toCYON), kJSPropertyAttributeDontEnum);
1546
1547         JSValueProtect(context, Array_prototype_);
1548         JSValueProtect(context, Array_pop_);
1549         JSValueProtect(context, Array_push_);
1550         JSValueProtect(context, Array_splice_);
1551
1552         JSObjectRef Functor(JSObjectMakeConstructor(context, Functor_, &Functor_new));
1553
1554         Function_prototype_ = (JSObjectRef) CYGetProperty(context, Function_, prototype_);
1555         JSValueProtect(context, Function_prototype_);
1556
1557         JSObjectSetPrototype(context, (JSObjectRef) CYGetProperty(context, Functor, prototype_), Function_prototype_);
1558
1559         CYSetProperty(context, global, CYJSString("Functor"), Functor);
1560         CYSetProperty(context, global, CYJSString("Pointer"), JSObjectMakeConstructor(context, Pointer_, &Pointer_new));
1561         CYSetProperty(context, global, CYJSString("Type"), JSObjectMakeConstructor(context, Type_privateData::Class_, &Type_new));
1562
1563         JSObjectRef cycript(JSObjectMake(context, NULL, NULL));
1564         CYSetProperty(context, global, CYJSString("Cycript"), cycript);
1565         CYSetProperty(context, cycript, CYJSString("gc"), JSObjectMakeFunctionWithCallback(context, CYJSString("gc"), &Cycript_gc_callAsFunction));
1566
1567         CYSetProperty(context, global, CYJSString("$cyq"), JSObjectMakeFunctionWithCallback(context, CYJSString("$cyq"), &$cyq));
1568
1569         System_ = JSObjectMake(context, NULL, NULL);
1570         JSValueProtect(context, System_);
1571
1572         CYSetProperty(context, global, CYJSString("system"), System_);
1573         CYSetProperty(context, System_, CYJSString("args"), CYJSNull(context));
1574         //CYSetProperty(context, System_, CYJSString("global"), global);
1575
1576         CYSetProperty(context, System_, CYJSString("print"), JSObjectMakeFunctionWithCallback(context, CYJSString("print"), &System_print));
1577
1578         Result_ = JSStringCreateWithUTF8CString("_");
1579
1580         if (hooks_ != NULL && hooks_->SetupContext != NULL)
1581             (*hooks_->SetupContext)(context);
1582     }
1583
1584     return Context_;
1585 }