Library.cpp

   1 /* Cycript - Inlining/Optimizing JavaScript Compiler
   2  * Copyright (C) 2009  Jay Freeman (saurik)
   3 */
   4
   5 /* Modified BSD License {{{ */
   6 /*
   7  *        Redistribution and use in source and binary
   8  * forms, with or without modification, are permitted
   9  * provided that the following conditions are met:
  10  *
  11  * 1. Redistributions of source code must retain the
  12  *    above copyright notice, this list of conditions
  13  *    and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the
  15  *    above copyright notice, this list of conditions
  16  *    and the following disclaimer in the documentation
  17  *    and/or other materials provided with the
  18  *    distribution.
  19  * 3. The name of the author may not be used to endorse
  20  *    or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS''
  24  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
  25  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  26  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
  28  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  29  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  30  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  31  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  34  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  35  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  36  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  37 */
  38 /* }}} */
  39
  40 #include <sqlite3.h>
  41
  42 #include "Internal.hpp"
  43
  44 #include <dlfcn.h>
  45 #include <iconv.h>
  46
  47 #include "cycript.hpp"
  48
  49 #include "sig/parse.hpp"
  50 #include "sig/ffi_type.hpp"
  51
  52 #include "Pooling.hpp"
  53
  54 #include <sys/mman.h>
  55
  56 #include <iostream>
  57 #include <ext/stdio_filebuf.h>
  58 #include <set>
  59 #include <map>
  60 #include <iomanip>
  61 #include <sstream>
  62 #include <cmath>
  63
  64 #include "Parser.hpp"
  65 #include "Cycript.tab.hh"
  66
  67 #include "Error.hpp"
  68 #include "JavaScript.hpp"
  69 #include "String.hpp"
  70
  71 #ifdef __OBJC__
  72 #define CYCatch_ \
  73     catch (NSException *error) { \
  74         CYThrow(context, error, exception); \
  75         return NULL; \
  76     }
  77 #else
  78 #define CYCatch_
  79 #endif
  80
  81 char *sqlite3_column_pooled(apr_pool_t *pool, sqlite3_stmt *stmt, int n) {
  82     if (const unsigned char *value = sqlite3_column_text(stmt, n))
  83         return apr_pstrdup(pool, (const char *) value);
  84     else return NULL;
  85 }
  86
  87 struct CYHooks *hooks_;
  88
  89 /* JavaScript Properties {{{ */
  90 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, size_t index) {
  91     JSValueRef exception(NULL);
  92     JSValueRef value(JSObjectGetPropertyAtIndex(context, object, index, &exception));
  93     CYThrow(context, exception);
  94     return value;
  95 }
  96
  97 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, JSStringRef name) {
  98     JSValueRef exception(NULL);
  99     JSValueRef value(JSObjectGetProperty(context, object, name, &exception));
 100     CYThrow(context, exception);
 101     return value;
 102 }
 103
 104 void CYSetProperty(JSContextRef context, JSObjectRef object, size_t index, JSValueRef value) {
 105     JSValueRef exception(NULL);
 106     JSObjectSetPropertyAtIndex(context, object, index, value, &exception);
 107     CYThrow(context, exception);
 108 }
 109
 110 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef value, JSPropertyAttributes attributes) {
 111     JSValueRef exception(NULL);
 112     JSObjectSetProperty(context, object, name, value, attributes, &exception);
 113     CYThrow(context, exception);
 114 }
 115
 116 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef (*callback)(JSContextRef, JSObjectRef, JSObjectRef, size_t, const JSValueRef[], JSValueRef *), JSPropertyAttributes attributes = kJSPropertyAttributeNone) {
 117     CYSetProperty(context, object, name, JSObjectMakeFunctionWithCallback(context, name, callback), attributes);
 118 }
 119 /* }}} */
 120 /* JavaScript Strings {{{ */
 121 JSStringRef CYCopyJSString(const char *value) {
 122     return value == NULL ? NULL : JSStringCreateWithUTF8CString(value);
 123 }
 124
 125 JSStringRef CYCopyJSString(JSStringRef value) {
 126     return value == NULL ? NULL : JSStringRetain(value);
 127 }
 128
 129 JSStringRef CYCopyJSString(CYUTF8String value) {
 130     // XXX: this is very wrong
 131     return CYCopyJSString(value.data);
 132 }
 133
 134 JSStringRef CYCopyJSString(JSContextRef context, JSValueRef value) {
 135     if (JSValueIsNull(context, value))
 136         return NULL;
 137     JSValueRef exception(NULL);
 138     JSStringRef string(JSValueToStringCopy(context, value, &exception));
 139     CYThrow(context, exception);
 140     return string;
 141 }
 142
 143 static CYUTF16String CYCastUTF16String(JSStringRef value) {
 144     return CYUTF16String(JSStringGetCharactersPtr(value), JSStringGetLength(value));
 145 }
 146
 147 template <typename Type_>
 148 _finline size_t iconv_(size_t (*iconv)(iconv_t, Type_, size_t *, char **, size_t *), iconv_t cd, char **inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft) {
 149     return iconv(cd, const_cast<Type_>(inbuf), inbytesleft, outbuf, outbytesleft);
 150 }
 151
 152 CYUTF8String CYPoolUTF8String(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 153     _assert(pool != NULL);
 154
 155     CYUTF16String utf16(CYCastUTF16String(value));
 156     const char *in(reinterpret_cast<const char *>(utf16.data));
 157
 158 #ifdef __GLIBC__
 159     iconv_t conversion(_syscall(iconv_open("UTF-8", "UCS-2")));
 160 #else
 161     iconv_t conversion(_syscall(iconv_open("UTF-8", "UCS-2-INTERNAL")));
 162 #endif
 163
 164     size_t size(JSStringGetMaximumUTF8CStringSize(value));
 165     char *out(new(pool) char[size]);
 166     CYUTF8String utf8(out, size);
 167
 168     size = utf16.size * 2;
 169     _syscall(iconv_(&iconv, conversion, const_cast<char **>(&in), &size, &out, &utf8.size));
 170
 171     *out = '\0';
 172     utf8.size = out - utf8.data;
 173
 174     _syscall(iconv_close(conversion));
 175
 176     return utf8;
 177 }
 178
 179 const char *CYPoolCString(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 180     CYUTF8String utf8(CYPoolUTF8String(pool, context, value));
 181     _assert(memchr(utf8.data, '\0', utf8.size) == NULL);
 182     return utf8.data;
 183 }
 184
 185 const char *CYPoolCString(apr_pool_t *pool, JSContextRef context, JSValueRef value) {
 186     return JSValueIsNull(context, value) ? NULL : CYPoolCString(pool, context, CYJSString(context, value));
 187 }
 188 /* }}} */
 189
 190 /* Index Offsets {{{ */
 191 size_t CYGetIndex(const CYUTF8String &value) {
 192     if (value.data[0] != '0') {
 193         size_t index(0);
 194         for (size_t i(0); i != value.size; ++i) {
 195             if (!DigitRange_[value.data[i]])
 196                 return _not(size_t);
 197             index *= 10;
 198             index += value.data[i] - '0';
 199         }
 200         return index;
 201     } else if (value.size == 1)
 202         return 0;
 203     else
 204         return _not(size_t);
 205 }
 206
 207 size_t CYGetIndex(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 208     return CYGetIndex(CYPoolUTF8String(pool, context, value));
 209 }
 210
 211 // XXX: this isn't actually right
 212 bool CYGetOffset(const char *value, ssize_t &index) {
 213     if (value[0] != '0') {
 214         char *end;
 215         index = strtol(value, &end, 10);
 216         if (value + strlen(value) == end)
 217             return true;
 218     } else if (value[1] == '\0') {
 219         index = 0;
 220         return true;
 221     }
 222
 223     return false;
 224 }
 225 /* }}} */
 226
 227 /* JavaScript *ify {{{ */
 228 void CYStringify(std::ostringstream &str, const char *data, size_t size) {
 229     unsigned quot(0), apos(0);
 230     for (const char *value(data), *end(data + size); value != end; ++value)
 231         if (*value == '"')
 232             ++quot;
 233         else if (*value == '\'')
 234             ++apos;
 235
 236     bool single(quot > apos);
 237
 238     str << (single ? '\'' : '"');
 239
 240     for (const char *value(data), *end(data + size); value != end; ++value)
 241         switch (*value) {
 242             case '\\': str << "\\\\"; break;
 243             case '\b': str << "\\b"; break;
 244             case '\f': str << "\\f"; break;
 245             case '\n': str << "\\n"; break;
 246             case '\r': str << "\\r"; break;
 247             case '\t': str << "\\t"; break;
 248             case '\v': str << "\\v"; break;
 249
 250             case '"':
 251                 if (!single)
 252                     str << "\\\"";
 253                 else goto simple;
 254             break;
 255
 256             case '\'':
 257                 if (single)
 258                     str << "\\'";
 259                 else goto simple;
 260             break;
 261
 262             default:
 263                 // this test is designed to be "awewsome", generating neither warnings nor incorrect results
 264                 if (*value < 0x20 || *value >= 0x7f)
 265                     str << "\\x" << std::setbase(16) << std::setw(2) << std::setfill('0') << unsigned(uint8_t(*value));
 266                 else simple:
 267                     str << *value;
 268         }
 269
 270     str << (single ? '\'' : '"');
 271 }
 272
 273 void CYNumerify(std::ostringstream &str, double value) {
 274     char string[32];
 275     // XXX: I want this to print 1e3 rather than 1000
 276     sprintf(string, "%.17g", value);
 277     str << string;
 278 }
 279
 280 bool CYIsKey(CYUTF8String value) {
 281     const char *data(value.data);
 282     size_t size(value.size);
 283
 284     if (size == 0)
 285         return false;
 286
 287     if (DigitRange_[data[0]]) {
 288         size_t index(CYGetIndex(value));
 289         if (index == _not(size_t))
 290             return false;
 291     } else {
 292         if (!WordStartRange_[data[0]])
 293             return false;
 294         for (size_t i(1); i != size; ++i)
 295             if (!WordEndRange_[data[i]])
 296                 return false;
 297     }
 298
 299     return true;
 300 }
 301 /* }}} */
 302
 303 static JSGlobalContextRef Context_;
 304
 305 static JSClassRef Functor_;
 306 static JSClassRef Global_;
 307 static JSClassRef Pointer_;
 308 static JSClassRef Runtime_;
 309 static JSClassRef Struct_;
 310
 311 JSStringRef Array_s;
 312 JSStringRef cy_s;
 313 JSStringRef length_s;
 314 JSStringRef message_s;
 315 JSStringRef name_s;
 316 JSStringRef pop_s;
 317 JSStringRef prototype_s;
 318 JSStringRef push_s;
 319 JSStringRef splice_s;
 320 JSStringRef toCYON_s;
 321 JSStringRef toJSON_s;
 322
 323 static JSStringRef Result_;
 324
 325 sqlite3 *Bridge_;
 326
 327 void CYFinalize(JSObjectRef object) {
 328     delete reinterpret_cast<CYData *>(JSObjectGetPrivate(object));
 329 }
 330
 331 struct CStringMapLess :
 332     std::binary_function<const char *, const char *, bool>
 333 {
 334     _finline bool operator ()(const char *lhs, const char *rhs) const {
 335         return strcmp(lhs, rhs) < 0;
 336     }
 337 };
 338
 339 void Structor_(apr_pool_t *pool, sig::Type *&type) {
 340     if (
 341         type->primitive == sig::pointer_P &&
 342         type->data.data.type != NULL &&
 343         type->data.data.type->primitive == sig::struct_P &&
 344         strcmp(type->data.data.type->name, "_objc_class") == 0
 345     ) {
 346         type->primitive = sig::typename_P;
 347         type->data.data.type = NULL;
 348         return;
 349     }
 350
 351     if (type->primitive != sig::struct_P || type->name == NULL)
 352         return;
 353
 354     sqlite3_stmt *statement;
 355
 356     _sqlcall(sqlite3_prepare(Bridge_,
 357         "select "
 358             "\"bridge\".\"mode\", "
 359             "\"bridge\".\"value\" "
 360         "from \"bridge\" "
 361         "where"
 362             " \"bridge\".\"mode\" in (3, 4) and"
 363             " \"bridge\".\"name\" = ?"
 364         " limit 1"
 365     , -1, &statement, NULL));
 366
 367     _sqlcall(sqlite3_bind_text(statement, 1, type->name, -1, SQLITE_STATIC));
 368
 369     int mode;
 370     const char *value;
 371
 372     if (_sqlcall(sqlite3_step(statement)) == SQLITE_DONE) {
 373         mode = -1;
 374         value = NULL;
 375     } else {
 376         mode = sqlite3_column_int(statement, 0);
 377         value = sqlite3_column_pooled(pool, statement, 1);
 378     }
 379
 380     _sqlcall(sqlite3_finalize(statement));
 381
 382     switch (mode) {
 383         default:
 384             _assert(false);
 385         case -1:
 386             break;
 387
 388         case 3: {
 389             sig::Parse(pool, &type->data.signature, value, &Structor_);
 390         } break;
 391
 392         case 4: {
 393             sig::Signature signature;
 394             sig::Parse(pool, &signature, value, &Structor_);
 395             type = signature.elements[0].type;
 396         } break;
 397     }
 398 }
 399
 400 JSClassRef Type_privateData::Class_;
 401
 402 struct Pointer :
 403     CYOwned
 404 {
 405     Type_privateData *type_;
 406     size_t length_;
 407
 408     Pointer(void *value, JSContextRef context, JSObjectRef owner, size_t length, sig::Type *type) :
 409         CYOwned(value, context, owner),
 410         type_(new(pool_) Type_privateData(type)),
 411         length_(length)
 412     {
 413     }
 414 };
 415
 416 struct Struct_privateData :
 417     CYOwned
 418 {
 419     Type_privateData *type_;
 420
 421     Struct_privateData(JSContextRef context, JSObjectRef owner) :
 422         CYOwned(NULL, context, owner)
 423     {
 424     }
 425 };
 426
 427 typedef std::map<const char *, Type_privateData *, CStringMapLess> TypeMap;
 428 static TypeMap Types_;
 429
 430 JSObjectRef CYMakeStruct(JSContextRef context, void *data, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 431     Struct_privateData *internal(new Struct_privateData(context, owner));
 432     apr_pool_t *pool(internal->pool_);
 433     Type_privateData *typical(new(pool) Type_privateData(type, ffi));
 434     internal->type_ = typical;
 435
 436     if (owner != NULL)
 437         internal->value_ = data;
 438     else {
 439         size_t size(typical->GetFFI()->size);
 440         void *copy(apr_palloc(internal->pool_, size));
 441         memcpy(copy, data, size);
 442         internal->value_ = copy;
 443     }
 444
 445     return JSObjectMake(context, Struct_, internal);
 446 }
 447
 448 JSValueRef CYCastJSValue(JSContextRef context, bool value) {
 449     return JSValueMakeBoolean(context, value);
 450 }
 451
 452 JSValueRef CYCastJSValue(JSContextRef context, double value) {
 453     return JSValueMakeNumber(context, value);
 454 }
 455
 456 #define CYCastJSValue_(Type_) \
 457     JSValueRef CYCastJSValue(JSContextRef context, Type_ value) { \
 458         return JSValueMakeNumber(context, static_cast<double>(value)); \
 459     }
 460
 461 CYCastJSValue_(int)
 462 CYCastJSValue_(unsigned int)
 463 CYCastJSValue_(long int)
 464 CYCastJSValue_(long unsigned int)
 465 CYCastJSValue_(long long int)
 466 CYCastJSValue_(long long unsigned int)
 467
 468 JSValueRef CYJSUndefined(JSContextRef context) {
 469     return JSValueMakeUndefined(context);
 470 }
 471
 472 double CYCastDouble(const char *value, size_t size) {
 473     char *end;
 474     double number(strtod(value, &end));
 475     if (end != value + size)
 476         return NAN;
 477     return number;
 478 }
 479
 480 double CYCastDouble(const char *value) {
 481     return CYCastDouble(value, strlen(value));
 482 }
 483
 484 double CYCastDouble(JSContextRef context, JSValueRef value) {
 485     JSValueRef exception(NULL);
 486     double number(JSValueToNumber(context, value, &exception));
 487     CYThrow(context, exception);
 488     return number;
 489 }
 490
 491 bool CYCastBool(JSContextRef context, JSValueRef value) {
 492     return JSValueToBoolean(context, value);
 493 }
 494
 495 JSValueRef CYJSNull(JSContextRef context) {
 496     return JSValueMakeNull(context);
 497 }
 498
 499 JSValueRef CYCastJSValue(JSContextRef context, JSStringRef value) {
 500     return value == NULL ? CYJSNull(context) : JSValueMakeString(context, value);
 501 }
 502
 503 JSValueRef CYCastJSValue(JSContextRef context, const char *value) {
 504     return CYCastJSValue(context, CYJSString(value));
 505 }
 506
 507 JSObjectRef CYCastJSObject(JSContextRef context, JSValueRef value) {
 508     JSValueRef exception(NULL);
 509     JSObjectRef object(JSValueToObject(context, value, &exception));
 510     CYThrow(context, exception);
 511     return object;
 512 }
 513
 514 JSValueRef CYCallAsFunction(JSContextRef context, JSObjectRef function, JSObjectRef _this, size_t count, JSValueRef arguments[]) {
 515     JSValueRef exception(NULL);
 516     JSValueRef value(JSObjectCallAsFunction(context, function, _this, count, arguments, &exception));
 517     CYThrow(context, exception);
 518     return value;
 519 }
 520
 521 bool CYIsCallable(JSContextRef context, JSValueRef value) {
 522     return value != NULL && JSValueIsObject(context, value) && JSObjectIsFunction(context, (JSObjectRef) value);
 523 }
 524
 525 static JSValueRef System_print(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 526     if (count == 0)
 527         printf("\n");
 528     else {
 529         CYPool pool;
 530         printf("%s\n", CYPoolCString(pool, context, arguments[0]));
 531     }
 532
 533     return CYJSUndefined(context);
 534 } CYCatch }
 535
 536 static size_t Nonce_(0);
 537
 538 static JSValueRef $cyq(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 539     CYPool pool;
 540     const char *name(apr_psprintf(pool, "%s%"APR_SIZE_T_FMT"", CYPoolCString(pool, context, arguments[0]), Nonce_++));
 541     return CYCastJSValue(context, name);
 542 }
 543
 544 static JSValueRef Cycript_gc_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 545     JSGarbageCollect(context);
 546     return CYJSUndefined(context);
 547 }
 548
 549 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSValueRef value, JSValueRef *exception) { CYTry {
 550     switch (JSType type = JSValueGetType(context, value)) {
 551         case kJSTypeUndefined:
 552             return "undefined";
 553         case kJSTypeNull:
 554             return "null";
 555         case kJSTypeBoolean:
 556             return CYCastBool(context, value) ? "true" : "false";
 557
 558         case kJSTypeNumber: {
 559             std::ostringstream str;
 560             CYNumerify(str, CYCastDouble(context, value));
 561             std::string value(str.str());
 562             return apr_pstrmemdup(pool, value.c_str(), value.size());
 563         } break;
 564
 565         case kJSTypeString: {
 566             std::ostringstream str;
 567             CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, value)));
 568             CYStringify(str, string.data, string.size);
 569             std::string value(str.str());
 570             return apr_pstrmemdup(pool, value.c_str(), value.size());
 571         } break;
 572
 573         case kJSTypeObject:
 574             return CYPoolCCYON(pool, context, (JSObjectRef) value);
 575         default:
 576             throw CYJSError(context, "JSValueGetType() == 0x%x", type);
 577     }
 578 } CYCatch }
 579
 580 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSValueRef value) {
 581     JSValueRef exception(NULL);
 582     const char *cyon(CYPoolCCYON(pool, context, value, &exception));
 583     CYThrow(context, exception);
 584     return cyon;
 585 }
 586
 587 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSObjectRef object) {
 588     JSValueRef toCYON(CYGetProperty(context, object, toCYON_s));
 589     if (CYIsCallable(context, toCYON)) {
 590         JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toCYON, object, 0, NULL));
 591         _assert(value != NULL);
 592         return CYPoolCString(pool, context, value);
 593     }
 594
 595     JSValueRef toJSON(CYGetProperty(context, object, toJSON_s));
 596     if (CYIsCallable(context, toJSON)) {
 597         JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 598         JSValueRef exception(NULL);
 599         const char *cyon(CYPoolCCYON(pool, context, CYCallAsFunction(context, (JSObjectRef) toJSON, object, 1, arguments), &exception));
 600         CYThrow(context, exception);
 601         return cyon;
 602     }
 603
 604     std::ostringstream str;
 605
 606     str << '{';
 607
 608     // XXX: this is, sadly, going to leak
 609     JSPropertyNameArrayRef names(JSObjectCopyPropertyNames(context, object));
 610
 611     bool comma(false);
 612
 613     for (size_t index(0), count(JSPropertyNameArrayGetCount(names)); index != count; ++index) {
 614         JSStringRef name(JSPropertyNameArrayGetNameAtIndex(names, index));
 615         JSValueRef value(CYGetProperty(context, object, name));
 616
 617         if (comma)
 618             str << ',';
 619         else
 620             comma = true;
 621
 622         CYUTF8String string(CYPoolUTF8String(pool, context, name));
 623         if (CYIsKey(string))
 624             str << string.data;
 625         else
 626             CYStringify(str, string.data, string.size);
 627
 628         str << ':' << CYPoolCCYON(pool, context, value);
 629     }
 630
 631     str << '}';
 632
 633     JSPropertyNameArrayRelease(names);
 634
 635     std::string string(str.str());
 636     return apr_pstrmemdup(pool, string.c_str(), string.size());
 637 }
 638
 639 static JSValueRef Array_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 640     CYPool pool;
 641     std::ostringstream str;
 642
 643     str << '[';
 644
 645     JSValueRef length(CYGetProperty(context, _this, length_s));
 646     bool comma(false);
 647
 648     for (size_t index(0), count(CYCastDouble(context, length)); index != count; ++index) {
 649         JSValueRef value(CYGetProperty(context, _this, index));
 650
 651         if (comma)
 652             str << ',';
 653         else
 654             comma = true;
 655
 656         if (!JSValueIsUndefined(context, value))
 657             str << CYPoolCCYON(pool, context, value);
 658         else {
 659             str << ',';
 660             comma = false;
 661         }
 662     }
 663
 664     str << ']';
 665
 666     std::string value(str.str());
 667     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 668 } CYCatch }
 669
 670 JSObjectRef CYMakePointer(JSContextRef context, void *pointer, size_t length, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 671     Pointer *internal(new Pointer(pointer, context, owner, length, type));
 672     return JSObjectMake(context, Pointer_, internal);
 673 }
 674
 675 static JSObjectRef CYMakeFunctor(JSContextRef context, void (*function)(), const char *type) {
 676     cy::Functor *internal(new cy::Functor(type, function));
 677     return JSObjectMake(context, Functor_, internal);
 678 }
 679
 680 static bool CYGetOffset(apr_pool_t *pool, JSContextRef context, JSStringRef value, ssize_t &index) {
 681     return CYGetOffset(CYPoolCString(pool, context, value), index);
 682 }
 683
 684 void *CYCastPointer_(JSContextRef context, JSValueRef value) {
 685     switch (JSValueGetType(context, value)) {
 686         case kJSTypeNull:
 687             return NULL;
 688         /*case kJSTypeObject:
 689             if (JSValueIsObjectOfClass(context, value, Pointer_)) {
 690                 Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate((JSObjectRef) value)));
 691                 return internal->value_;
 692             }*/
 693         default:
 694             double number(CYCastDouble(context, value));
 695             if (std::isnan(number))
 696                 throw CYJSError(context, "cannot convert value to pointer");
 697             return reinterpret_cast<void *>(static_cast<uintptr_t>(static_cast<long long>(number)));
 698     }
 699 }
 700
 701 void CYPoolFFI(apr_pool_t *pool, JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, JSValueRef value) {
 702     switch (type->primitive) {
 703         case sig::boolean_P:
 704             *reinterpret_cast<bool *>(data) = JSValueToBoolean(context, value);
 705         break;
 706
 707 #define CYPoolFFI_(primitive, native) \
 708         case sig::primitive ## _P: \
 709             *reinterpret_cast<native *>(data) = CYCastDouble(context, value); \
 710         break;
 711
 712         CYPoolFFI_(uchar, unsigned char)
 713         CYPoolFFI_(char, char)
 714         CYPoolFFI_(ushort, unsigned short)
 715         CYPoolFFI_(short, short)
 716         CYPoolFFI_(ulong, unsigned long)
 717         CYPoolFFI_(long, long)
 718         CYPoolFFI_(uint, unsigned int)
 719         CYPoolFFI_(int, int)
 720         CYPoolFFI_(ulonglong, unsigned long long)
 721         CYPoolFFI_(longlong, long long)
 722         CYPoolFFI_(float, float)
 723         CYPoolFFI_(double, double)
 724
 725         case sig::array_P: {
 726             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 727             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 728             for (size_t index(0); index != type->data.data.size; ++index) {
 729                 ffi_type *field(ffi->elements[index]);
 730
 731                 JSValueRef rhs;
 732                 if (aggregate == NULL)
 733                     rhs = value;
 734                 else {
 735                     rhs = CYGetProperty(context, aggregate, index);
 736                     if (JSValueIsUndefined(context, rhs))
 737                         throw CYJSError(context, "unable to extract array value");
 738                 }
 739
 740                 CYPoolFFI(pool, context, type->data.data.type, field, base, rhs);
 741                 // XXX: alignment?
 742                 base += field->size;
 743             }
 744         } break;
 745
 746         case sig::pointer_P:
 747             *reinterpret_cast<void **>(data) = CYCastPointer<void *>(context, value);
 748         break;
 749
 750         case sig::string_P:
 751             *reinterpret_cast<const char **>(data) = CYPoolCString(pool, context, value);
 752         break;
 753
 754         case sig::struct_P: {
 755             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 756             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 757             for (size_t index(0); index != type->data.signature.count; ++index) {
 758                 sig::Element *element(&type->data.signature.elements[index]);
 759                 ffi_type *field(ffi->elements[index]);
 760
 761                 JSValueRef rhs;
 762                 if (aggregate == NULL)
 763                     rhs = value;
 764                 else {
 765                     rhs = CYGetProperty(context, aggregate, index);
 766                     if (JSValueIsUndefined(context, rhs)) {
 767                         if (element->name != NULL)
 768                             rhs = CYGetProperty(context, aggregate, CYJSString(element->name));
 769                         else
 770                             goto undefined;
 771                         if (JSValueIsUndefined(context, rhs)) undefined:
 772                             throw CYJSError(context, "unable to extract structure value");
 773                     }
 774                 }
 775
 776                 CYPoolFFI(pool, context, element->type, field, base, rhs);
 777                 // XXX: alignment?
 778                 base += field->size;
 779             }
 780         } break;
 781
 782         case sig::void_P:
 783         break;
 784
 785         default:
 786             if (hooks_ != NULL && hooks_->PoolFFI != NULL)
 787                 if ((*hooks_->PoolFFI)(pool, context, type, ffi, data, value))
 788                     return;
 789
 790             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 791     }
 792 }
 793
 794 JSValueRef CYFromFFI(JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, bool initialize, JSObjectRef owner) {
 795     switch (type->primitive) {
 796         case sig::boolean_P:
 797             return CYCastJSValue(context, *reinterpret_cast<bool *>(data));
 798
 799 #define CYFromFFI_(primitive, native) \
 800         case sig::primitive ## _P: \
 801             return CYCastJSValue(context, *reinterpret_cast<native *>(data)); \
 802
 803         CYFromFFI_(uchar, unsigned char)
 804         CYFromFFI_(char, char)
 805         CYFromFFI_(ushort, unsigned short)
 806         CYFromFFI_(short, short)
 807         CYFromFFI_(ulong, unsigned long)
 808         CYFromFFI_(long, long)
 809         CYFromFFI_(uint, unsigned int)
 810         CYFromFFI_(int, int)
 811         CYFromFFI_(ulonglong, unsigned long long)
 812         CYFromFFI_(longlong, long long)
 813         CYFromFFI_(float, float)
 814         CYFromFFI_(double, double)
 815
 816         case sig::array_P:
 817             if (void *pointer = data)
 818                 return CYMakePointer(context, pointer, type->data.data.size, type->data.data.type, NULL, owner);
 819             else goto null;
 820
 821         case sig::pointer_P:
 822             if (void *pointer = *reinterpret_cast<void **>(data))
 823                 return CYMakePointer(context, pointer, _not(size_t), type->data.data.type, NULL, owner);
 824             else goto null;
 825
 826         case sig::string_P:
 827             if (char *utf8 = *reinterpret_cast<char **>(data))
 828                 return CYCastJSValue(context, utf8);
 829             else goto null;
 830
 831         case sig::struct_P:
 832             return CYMakeStruct(context, data, type, ffi, owner);
 833         case sig::void_P:
 834             return CYJSUndefined(context);
 835
 836         null:
 837             return CYJSNull(context);
 838         default:
 839             if (hooks_ != NULL && hooks_->FromFFI != NULL)
 840                 if (JSValueRef value = (*hooks_->FromFFI)(context, type, ffi, data, initialize, owner))
 841                     return value;
 842
 843             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 844     }
 845 }
 846
 847 static void FunctionClosure_(ffi_cif *cif, void *result, void **arguments, void *arg) {
 848     Closure_privateData *internal(reinterpret_cast<Closure_privateData *>(arg));
 849
 850     JSContextRef context(internal->context_);
 851
 852     size_t count(internal->cif_.nargs);
 853     JSValueRef values[count];
 854
 855     for (size_t index(0); index != count; ++index)
 856         values[index] = CYFromFFI(context, internal->signature_.elements[1 + index].type, internal->cif_.arg_types[index], arguments[index]);
 857
 858     JSValueRef value(CYCallAsFunction(context, internal->function_, NULL, count, values));
 859     CYPoolFFI(NULL, context, internal->signature_.elements[0].type, internal->cif_.rtype, result, value);
 860 }
 861
 862 Closure_privateData *CYMakeFunctor_(JSContextRef context, JSObjectRef function, const char *type, void (*callback)(ffi_cif *, void *, void **, void *)) {
 863     // XXX: in case of exceptions this will leak
 864     // XXX: in point of fact, this may /need/ to leak :(
 865     Closure_privateData *internal(new Closure_privateData(context, function, type));
 866
 867     ffi_closure *closure((ffi_closure *) _syscall(mmap(
 868         NULL, sizeof(ffi_closure),
 869         PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE,
 870         -1, 0
 871     )));
 872
 873     ffi_status status(ffi_prep_closure(closure, &internal->cif_, callback, internal));
 874     _assert(status == FFI_OK);
 875
 876     _syscall(mprotect(closure, sizeof(*closure), PROT_READ | PROT_EXEC));
 877
 878     internal->value_ = closure;
 879
 880     return internal;
 881 }
 882
 883 static JSObjectRef CYMakeFunctor(JSContextRef context, JSObjectRef function, const char *type) {
 884     Closure_privateData *internal(CYMakeFunctor_(context, function, type, &FunctionClosure_));
 885     JSObjectRef object(JSObjectMake(context, Functor_, internal));
 886     // XXX: see above notes about needing to leak
 887     JSValueProtect(CYGetJSContext(context), object);
 888     return object;
 889 }
 890
 891 JSObjectRef CYGetCachedObject(JSContextRef context, JSStringRef name) {
 892     return CYCastJSObject(context, CYGetProperty(context, CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s)), name));
 893 }
 894
 895 static JSObjectRef CYMakeFunctor(JSContextRef context, JSValueRef value, const char *type) {
 896     JSObjectRef Function(CYGetCachedObject(context, CYJSString("Function")));
 897
 898     JSValueRef exception(NULL);
 899     bool function(JSValueIsInstanceOfConstructor(context, value, Function, &exception));
 900     CYThrow(context, exception);
 901
 902     if (function) {
 903         JSObjectRef function(CYCastJSObject(context, value));
 904         return CYMakeFunctor(context, function, type);
 905     } else {
 906         void (*function)()(CYCastPointer<void (*)()>(context, value));
 907         return CYMakeFunctor(context, function, type);
 908     }
 909 }
 910
 911 static bool Index_(apr_pool_t *pool, JSContextRef context, Struct_privateData *internal, JSStringRef property, ssize_t &index, uint8_t *&base) {
 912     Type_privateData *typical(internal->type_);
 913     sig::Type *type(typical->type_);
 914     if (type == NULL)
 915         return false;
 916
 917     const char *name(CYPoolCString(pool, context, property));
 918     size_t length(strlen(name));
 919     double number(CYCastDouble(name, length));
 920
 921     size_t count(type->data.signature.count);
 922
 923     if (std::isnan(number)) {
 924         if (property == NULL)
 925             return false;
 926
 927         sig::Element *elements(type->data.signature.elements);
 928
 929         for (size_t local(0); local != count; ++local) {
 930             sig::Element *element(&elements[local]);
 931             if (element->name != NULL && strcmp(name, element->name) == 0) {
 932                 index = local;
 933                 goto base;
 934             }
 935         }
 936
 937         return false;
 938     } else {
 939         index = static_cast<ssize_t>(number);
 940         if (index != number || index < 0 || static_cast<size_t>(index) >= count)
 941             return false;
 942     }
 943
 944   base:
 945     ffi_type **elements(typical->GetFFI()->elements);
 946
 947     base = reinterpret_cast<uint8_t *>(internal->value_);
 948     for (ssize_t local(0); local != index; ++local)
 949         base += elements[local]->size;
 950
 951     return true;
 952 }
 953
 954 static JSValueRef Pointer_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 955     CYPool pool;
 956     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 957
 958     if (JSStringIsEqual(property, length_s))
 959         return internal->length_ == _not(size_t) ? CYJSUndefined(context) : CYCastJSValue(context, internal->length_);
 960
 961     Type_privateData *typical(internal->type_);
 962
 963     if (typical->type_ == NULL)
 964         return NULL;
 965
 966     ssize_t offset;
 967     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 968         offset = 0;
 969     else if (!CYGetOffset(pool, context, property, offset))
 970         return NULL;
 971
 972     ffi_type *ffi(typical->GetFFI());
 973
 974     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 975     base += ffi->size * offset;
 976
 977     JSObjectRef owner(internal->GetOwner() ?: object);
 978     return CYFromFFI(context, typical->type_, ffi, base, false, owner);
 979 } CYCatch }
 980
 981 static bool Pointer_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 982     CYPool pool;
 983     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 984     Type_privateData *typical(internal->type_);
 985
 986     if (typical->type_ == NULL)
 987         return NULL;
 988
 989     ssize_t offset;
 990     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 991         offset = 0;
 992     else if (!CYGetOffset(pool, context, property, offset))
 993         return NULL;
 994
 995     ffi_type *ffi(typical->GetFFI());
 996
 997     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 998     base += ffi->size * offset;
 999
1000     CYPoolFFI(NULL, context, typical->type_, ffi, base, value);
1001     return true;
1002 } CYCatch }
1003
1004 static JSValueRef Struct_callAsFunction_$cya(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1005     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(_this)));
1006     Type_privateData *typical(internal->type_);
1007     return CYMakePointer(context, internal->value_, _not(size_t), typical->type_, typical->ffi_, _this);
1008 }
1009
1010 static JSValueRef Struct_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1011     CYPool pool;
1012     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
1013     Type_privateData *typical(internal->type_);
1014
1015     ssize_t index;
1016     uint8_t *base;
1017
1018     if (!Index_(pool, context, internal, property, index, base))
1019         return NULL;
1020
1021     JSObjectRef owner(internal->GetOwner() ?: object);
1022
1023     return CYFromFFI(context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, false, owner);
1024 } CYCatch }
1025
1026 static bool Struct_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
1027     CYPool pool;
1028     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
1029     Type_privateData *typical(internal->type_);
1030
1031     ssize_t index;
1032     uint8_t *base;
1033
1034     if (!Index_(pool, context, internal, property, index, base))
1035         return false;
1036
1037     CYPoolFFI(NULL, context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, value);
1038     return true;
1039 } CYCatch }
1040
1041 static void Struct_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
1042     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
1043     Type_privateData *typical(internal->type_);
1044     sig::Type *type(typical->type_);
1045
1046     if (type == NULL)
1047         return;
1048
1049     size_t count(type->data.signature.count);
1050     sig::Element *elements(type->data.signature.elements);
1051
1052     char number[32];
1053
1054     for (size_t index(0); index != count; ++index) {
1055         const char *name;
1056         name = elements[index].name;
1057
1058         if (name == NULL) {
1059             sprintf(number, "%zu", index);
1060             name = number;
1061         }
1062
1063         JSPropertyNameAccumulatorAddName(names, CYJSString(name));
1064     }
1065 }
1066
1067 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 {
1068     if (setups + count != signature->count - 1)
1069         throw CYJSError(context, "incorrect number of arguments to ffi function");
1070
1071     size_t size(setups + count);
1072     void *values[size];
1073     memcpy(values, setup, sizeof(void *) * setups);
1074
1075     for (size_t index(setups); index != size; ++index) {
1076         sig::Element *element(&signature->elements[index + 1]);
1077         ffi_type *ffi(cif->arg_types[index]);
1078         // XXX: alignment?
1079         values[index] = new(pool) uint8_t[ffi->size];
1080         CYPoolFFI(pool, context, element->type, ffi, values[index], arguments[index - setups]);
1081     }
1082
1083     uint8_t value[cif->rtype->size];
1084
1085     if (hooks_ != NULL && hooks_->CallFunction != NULL)
1086         (*hooks_->CallFunction)(context, cif, function, value, values);
1087     else
1088         ffi_call(cif, function, value, values);
1089
1090     return CYFromFFI(context, signature->elements[0].type, cif->rtype, value, initialize);
1091 } CYCatch }
1092
1093 static JSValueRef Functor_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1094     CYPool pool;
1095     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
1096     return CYCallFunction(pool, context, 0, NULL, count, arguments, false, exception, &internal->signature_, &internal->cif_, internal->GetValue());
1097 }
1098
1099 static JSObjectRef CYMakeType(JSContextRef context, const char *type) {
1100     Type_privateData *internal(new Type_privateData(type));
1101     return JSObjectMake(context, Type_privateData::Class_, internal);
1102 }
1103
1104 static JSObjectRef CYMakeType(JSContextRef context, sig::Type *type) {
1105     Type_privateData *internal(new Type_privateData(type));
1106     return JSObjectMake(context, Type_privateData::Class_, internal);
1107 }
1108
1109 static void *CYCastSymbol(const char *name) {
1110     return dlsym(RTLD_DEFAULT, name);
1111 }
1112
1113 static JSValueRef Runtime_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1114     CYPool pool;
1115     CYUTF8String name(CYPoolUTF8String(pool, context, property));
1116
1117     if (hooks_ != NULL && hooks_->RuntimeProperty != NULL)
1118         if (JSValueRef value = (*hooks_->RuntimeProperty)(context, name))
1119             return value;
1120
1121     sqlite3_stmt *statement;
1122
1123     _sqlcall(sqlite3_prepare(Bridge_,
1124         "select "
1125             "\"bridge\".\"mode\", "
1126             "\"bridge\".\"value\" "
1127         "from \"bridge\" "
1128         "where"
1129             " \"bridge\".\"name\" = ?"
1130         " limit 1"
1131     , -1, &statement, NULL));
1132
1133     _sqlcall(sqlite3_bind_text(statement, 1, name.data, name.size, SQLITE_STATIC));
1134
1135     int mode;
1136     const char *value;
1137
1138     if (_sqlcall(sqlite3_step(statement)) == SQLITE_DONE) {
1139         mode = -1;
1140         value = NULL;
1141     } else {
1142         mode = sqlite3_column_int(statement, 0);
1143         value = sqlite3_column_pooled(pool, statement, 1);
1144     }
1145
1146     _sqlcall(sqlite3_finalize(statement));
1147
1148     switch (mode) {
1149         default:
1150             _assert(false);
1151         case -1:
1152             return NULL;
1153
1154         case 0:
1155             return JSEvaluateScript(CYGetJSContext(context), CYJSString(value), NULL, NULL, 0, NULL);
1156
1157         case 1:
1158             if (void (*symbol)() = reinterpret_cast<void (*)()>(CYCastSymbol(name.data)))
1159                 return CYMakeFunctor(context, symbol, value);
1160             else return NULL;
1161
1162         case 2:
1163             if (void *symbol = CYCastSymbol(name.data)) {
1164                 // XXX: this is horrendously inefficient
1165                 sig::Signature signature;
1166                 sig::Parse(pool, &signature, value, &Structor_);
1167                 ffi_cif cif;
1168                 sig::sig_ffi_cif(pool, &sig::ObjectiveC, &signature, &cif);
1169                 return CYFromFFI(context, signature.elements[0].type, cif.rtype, symbol);
1170             } else return NULL;
1171
1172         // XXX: implement case 3
1173         case 4:
1174             return CYMakeType(context, value);
1175     }
1176 } CYCatch }
1177
1178 static JSObjectRef Pointer_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1179     if (count != 2)
1180         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1181
1182     CYPool pool;
1183
1184     void *value(CYCastPointer<void *>(context, arguments[0]));
1185     const char *type(CYPoolCString(pool, context, arguments[1]));
1186
1187     sig::Signature signature;
1188     sig::Parse(pool, &signature, type, &Structor_);
1189
1190     return CYMakePointer(context, value, _not(size_t), signature.elements[0].type, NULL, NULL);
1191 } CYCatch }
1192
1193 static JSObjectRef Type_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1194     if (count != 1)
1195         throw CYJSError(context, "incorrect number of arguments to Type constructor");
1196     CYPool pool;
1197     const char *type(CYPoolCString(pool, context, arguments[0]));
1198     return CYMakeType(context, type);
1199 } CYCatch }
1200
1201 static JSValueRef Type_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1202     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1203
1204     sig::Type type;
1205
1206     if (JSStringIsEqualToUTF8CString(property, "$cyi")) {
1207         type.primitive = sig::pointer_P;
1208         type.data.data.size = 0;
1209     } else {
1210         CYPool pool;
1211         size_t index(CYGetIndex(pool, context, property));
1212         if (index == _not(size_t))
1213             return NULL;
1214         type.primitive = sig::array_P;
1215         type.data.data.size = index;
1216     }
1217
1218     type.name = NULL;
1219     type.flags = 0;
1220
1221     type.data.data.type = internal->type_;
1222
1223     return CYMakeType(context, &type);
1224 } CYCatch }
1225
1226 static JSValueRef Type_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1227     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1228
1229     if (count != 1)
1230         throw CYJSError(context, "incorrect number of arguments to type cast function");
1231     sig::Type *type(internal->type_);
1232     ffi_type *ffi(internal->GetFFI());
1233     // XXX: alignment?
1234     uint8_t value[ffi->size];
1235     CYPool pool;
1236     CYPoolFFI(pool, context, type, ffi, value, arguments[0]);
1237     return CYFromFFI(context, type, ffi, value);
1238 } CYCatch }
1239
1240 static JSObjectRef Type_callAsConstructor(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1241     if (count != 0)
1242         throw CYJSError(context, "incorrect number of arguments to type cast function");
1243     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1244
1245     sig::Type *type(internal->type_);
1246     size_t length;
1247
1248     if (type->primitive != sig::array_P)
1249         length = _not(size_t);
1250     else {
1251         length = type->data.data.size;
1252         type = type->data.data.type;
1253     }
1254
1255     void *value(malloc(internal->GetFFI()->size));
1256     return CYMakePointer(context, value, length, type, NULL, NULL);
1257 } CYCatch }
1258
1259 static JSObjectRef Functor_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1260     if (count != 2)
1261         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1262     CYPool pool;
1263     const char *type(CYPoolCString(pool, context, arguments[1]));
1264     return CYMakeFunctor(context, arguments[0], type);
1265 } CYCatch }
1266
1267 static JSValueRef CYValue_callAsFunction_valueOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1268     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1269     return CYCastJSValue(context, reinterpret_cast<uintptr_t>(internal->value_));
1270 } CYCatch }
1271
1272 static JSValueRef CYValue_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1273     return CYValue_callAsFunction_valueOf(context, object, _this, count, arguments, exception);
1274 }
1275
1276 static JSValueRef CYValue_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1277     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1278     char string[32];
1279     sprintf(string, "%p", internal->value_);
1280     return CYCastJSValue(context, string);
1281 } CYCatch }
1282
1283 static JSValueRef Pointer_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1284     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(_this)));
1285     if (internal->length_ != _not(size_t))
1286         // XXX: maybe dynamically look up Array.toCYON?
1287         return Array_callAsFunction_toCYON(context, object, _this, count, arguments, exception);
1288     else {
1289         char string[32];
1290         sprintf(string, "%p", internal->value_);
1291         return CYCastJSValue(context, string);
1292     }
1293 } CYCatch }
1294
1295 static JSValueRef Type_callAsFunction_toString(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1296     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1297     CYPool pool;
1298     const char *type(sig::Unparse(pool, internal->type_));
1299     return CYCastJSValue(context, CYJSString(type));
1300 } CYCatch }
1301
1302 static JSValueRef Type_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1303     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1304     CYPool pool;
1305     const char *type(sig::Unparse(pool, internal->type_));
1306     size_t size(strlen(type));
1307     char *cyon(new(pool) char[12 + size + 1]);
1308     memcpy(cyon, "new Type(\"", 10);
1309     cyon[12 + size] = '\0';
1310     cyon[12 + size - 2] = '"';
1311     cyon[12 + size - 1] = ')';
1312     memcpy(cyon + 10, type, size);
1313     return CYCastJSValue(context, CYJSString(cyon));
1314 } CYCatch }
1315
1316 static JSValueRef Type_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1317     return Type_callAsFunction_toString(context, object, _this, count, arguments, exception);
1318 }
1319
1320 static JSStaticFunction Pointer_staticFunctions[4] = {
1321     {"toCYON", &Pointer_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1322     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1323     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1324     {NULL, NULL, 0}
1325 };
1326
1327 static JSStaticFunction Struct_staticFunctions[2] = {
1328     {"$cya", &Struct_callAsFunction_$cya, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1329     {NULL, NULL, 0}
1330 };
1331
1332 static JSStaticFunction Functor_staticFunctions[4] = {
1333     {"toCYON", &CYValue_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1334     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1335     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1336     {NULL, NULL, 0}
1337 };
1338
1339 namespace cy {
1340     JSStaticFunction const * const Functor::StaticFunctions = Functor_staticFunctions;
1341 }
1342
1343 static JSStaticFunction Type_staticFunctions[4] = {
1344     {"toCYON", &Type_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1345     {"toJSON", &Type_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1346     {"toString", &Type_callAsFunction_toString, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1347     {NULL, NULL, 0}
1348 };
1349
1350 static JSObjectRef (*JSObjectMakeArray$)(JSContextRef, size_t, const JSValueRef[], JSValueRef *);
1351
1352 void CYSetArgs(int argc, const char *argv[]) {
1353     JSContextRef context(CYGetJSContext());
1354     JSValueRef args[argc];
1355     for (int i(0); i != argc; ++i)
1356         args[i] = CYCastJSValue(context, argv[i]);
1357
1358     JSObjectRef array;
1359     if (JSObjectMakeArray$ != NULL) {
1360         JSValueRef exception(NULL);
1361         array = (*JSObjectMakeArray$)(context, argc, args, &exception);
1362         CYThrow(context, exception);
1363     } else {
1364         JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array")));
1365         JSValueRef value(CYCallAsFunction(context, Array, NULL, argc, args));
1366         array = CYCastJSObject(context, value);
1367     }
1368
1369     JSObjectRef System(CYGetCachedObject(context, CYJSString("System")));
1370     CYSetProperty(context, System, CYJSString("args"), array);
1371 }
1372
1373 JSObjectRef CYGetGlobalObject(JSContextRef context) {
1374     return JSContextGetGlobalObject(context);
1375 }
1376
1377 const char *CYExecute(apr_pool_t *pool, const char *code) {
1378     JSContextRef context(CYGetJSContext());
1379     JSValueRef exception(NULL), result;
1380
1381     void *handle;
1382     if (hooks_ != NULL && hooks_->ExecuteStart != NULL)
1383         handle = (*hooks_->ExecuteStart)(context);
1384     else
1385         handle = NULL;
1386
1387     const char *json;
1388
1389     try {
1390         result = JSEvaluateScript(context, CYJSString(code), NULL, NULL, 0, &exception);
1391     } catch (const char *error) {
1392         return error;
1393     }
1394
1395     if (exception != NULL) { error:
1396         result = exception;
1397         exception = NULL;
1398     }
1399
1400     if (JSValueIsUndefined(context, result))
1401         return NULL;
1402
1403     try {
1404         json = CYPoolCCYON(pool, context, result, &exception);
1405     } catch (const char *error) {
1406         return error;
1407     }
1408
1409     if (exception != NULL)
1410         goto error;
1411
1412     CYSetProperty(context, CYGetGlobalObject(context), Result_, result);
1413
1414     if (hooks_ != NULL && hooks_->ExecuteEnd != NULL)
1415         (*hooks_->ExecuteEnd)(context, handle);
1416     return json;
1417 }
1418
1419 static apr_pool_t *Pool_;
1420
1421 static bool initialized_;
1422
1423 void CYInitialize() {
1424     if (!initialized_)
1425         initialized_ = true;
1426     else return;
1427
1428     _aprcall(apr_initialize());
1429     _aprcall(apr_pool_create(&Pool_, NULL));
1430     _sqlcall(sqlite3_open("/usr/lib/libcycript.db", &Bridge_));
1431
1432     JSObjectMakeArray$ = reinterpret_cast<JSObjectRef (*)(JSContextRef, size_t, const JSValueRef[], JSValueRef *)>(dlsym(RTLD_DEFAULT, "JSObjectMakeArray"));
1433
1434     JSClassDefinition definition;
1435
1436     definition = kJSClassDefinitionEmpty;
1437     definition.className = "Functor";
1438     definition.staticFunctions = cy::Functor::StaticFunctions;
1439     definition.callAsFunction = &Functor_callAsFunction;
1440     definition.finalize = &CYFinalize;
1441     Functor_ = JSClassCreate(&definition);
1442
1443     definition = kJSClassDefinitionEmpty;
1444     definition.className = "Pointer";
1445     definition.staticFunctions = Pointer_staticFunctions;
1446     definition.getProperty = &Pointer_getProperty;
1447     definition.setProperty = &Pointer_setProperty;
1448     definition.finalize = &CYFinalize;
1449     Pointer_ = JSClassCreate(&definition);
1450
1451     definition = kJSClassDefinitionEmpty;
1452     definition.className = "Struct";
1453     definition.staticFunctions = Struct_staticFunctions;
1454     definition.getProperty = &Struct_getProperty;
1455     definition.setProperty = &Struct_setProperty;
1456     definition.getPropertyNames = &Struct_getPropertyNames;
1457     definition.finalize = &CYFinalize;
1458     Struct_ = JSClassCreate(&definition);
1459
1460     definition = kJSClassDefinitionEmpty;
1461     definition.className = "Type";
1462     definition.staticFunctions = Type_staticFunctions;
1463     definition.getProperty = &Type_getProperty;
1464     definition.callAsFunction = &Type_callAsFunction;
1465     definition.callAsConstructor = &Type_callAsConstructor;
1466     definition.finalize = &CYFinalize;
1467     Type_privateData::Class_ = JSClassCreate(&definition);
1468
1469     definition = kJSClassDefinitionEmpty;
1470     definition.className = "Runtime";
1471     definition.getProperty = &Runtime_getProperty;
1472     Runtime_ = JSClassCreate(&definition);
1473
1474     definition = kJSClassDefinitionEmpty;
1475     //definition.getProperty = &Global_getProperty;
1476     Global_ = JSClassCreate(&definition);
1477
1478     Array_s = JSStringCreateWithUTF8CString("Array");
1479     cy_s = JSStringCreateWithUTF8CString("$cy");
1480     length_s = JSStringCreateWithUTF8CString("length");
1481     message_s = JSStringCreateWithUTF8CString("message");
1482     name_s = JSStringCreateWithUTF8CString("name");
1483     pop_s = JSStringCreateWithUTF8CString("pop");
1484     prototype_s = JSStringCreateWithUTF8CString("prototype");
1485     push_s = JSStringCreateWithUTF8CString("push");
1486     splice_s = JSStringCreateWithUTF8CString("splice");
1487     toCYON_s = JSStringCreateWithUTF8CString("toCYON");
1488     toJSON_s = JSStringCreateWithUTF8CString("toJSON");
1489
1490     Result_ = JSStringCreateWithUTF8CString("_");
1491
1492     if (hooks_ != NULL && hooks_->Initialize != NULL)
1493         (*hooks_->Initialize)();
1494 }
1495
1496 apr_pool_t *CYGetGlobalPool() {
1497     CYInitialize();
1498     return Pool_;
1499 }
1500
1501 void CYThrow(JSContextRef context, JSValueRef value) {
1502     if (value != NULL)
1503         throw CYJSError(context, value);
1504 }
1505
1506 const char *CYJSError::PoolCString(apr_pool_t *pool) const {
1507     // XXX: this used to be CYPoolCString
1508     return CYPoolCCYON(pool, context_, value_);
1509 }
1510
1511 JSValueRef CYJSError::CastJSValue(JSContextRef context) const {
1512     // XXX: what if the context is different?
1513     return value_;
1514 }
1515
1516 void CYThrow(const char *format, ...) {
1517     va_list args;
1518     va_start (args, format);
1519     throw CYPoolError(format, args);
1520     // XXX: does this matter? :(
1521     va_end (args);
1522 }
1523
1524 const char *CYPoolError::PoolCString(apr_pool_t *pool) const {
1525     return apr_pstrdup(pool, message_);
1526 }
1527
1528 CYPoolError::CYPoolError(const char *format, ...) {
1529     va_list args;
1530     va_start (args, format);
1531     message_ = apr_pvsprintf(pool_, format, args);
1532     va_end (args);
1533 }
1534
1535 CYPoolError::CYPoolError(const char *format, va_list args) {
1536     message_ = apr_pvsprintf(pool_, format, args);
1537 }
1538
1539 JSValueRef CYCastJSError(JSContextRef context, const char *message) {
1540     JSObjectRef Error(CYGetCachedObject(context, CYJSString("Error")));
1541
1542     JSValueRef arguments[1] = {CYCastJSValue(context, message)};
1543
1544     JSValueRef exception(NULL);
1545     JSValueRef value(JSObjectCallAsConstructor(context, Error, 1, arguments, &exception));
1546     CYThrow(context, exception);
1547
1548     return value;
1549 }
1550
1551 JSValueRef CYPoolError::CastJSValue(JSContextRef context) const {
1552     return CYCastJSError(context, message_);
1553 }
1554
1555 CYJSError::CYJSError(JSContextRef context, const char *format, ...) {
1556     _assert(context != NULL);
1557
1558     CYPool pool;
1559
1560     va_list args;
1561     va_start (args, format);
1562     const char *message(apr_pvsprintf(pool, format, args));
1563     va_end (args);
1564
1565     value_ = CYCastJSError(context, message);
1566 }
1567
1568 JSGlobalContextRef CYGetJSContext(JSContextRef context) {
1569     // XXX: do something better
1570     return Context_;
1571 }
1572
1573 void CYSetupContext(JSGlobalContextRef context) {
1574     JSObjectRef global(CYGetGlobalObject(context));
1575
1576     JSObjectRef cy(JSObjectMake(context, NULL, NULL));
1577     CYSetProperty(context, global, cy_s, cy);
1578
1579     JSObjectRef Array(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Array"))));
1580     CYSetProperty(context, cy, CYJSString("Array"), Array);
1581
1582     JSObjectRef Array_prototype(CYCastJSObject(context, CYGetProperty(context, Array, prototype_s)));
1583     CYSetProperty(context, cy, CYJSString("Array_prototype"), Array_prototype);
1584
1585     JSObjectRef Error(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Error"))));
1586     CYSetProperty(context, cy, CYJSString("Error"), Error);
1587
1588     JSObjectRef Function(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Function"))));
1589     CYSetProperty(context, cy, CYJSString("Function"), Function);
1590
1591     JSObjectRef Function_prototype(CYCastJSObject(context, CYGetProperty(context, Function, prototype_s)));
1592     CYSetProperty(context, cy, CYJSString("Function_prototype"), Function_prototype);
1593
1594     JSObjectRef Object(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Object"))));
1595     CYSetProperty(context, cy, CYJSString("Object"), Object);
1596
1597     JSObjectRef Object_prototype(CYCastJSObject(context, CYGetProperty(context, Object, prototype_s)));
1598     CYSetProperty(context, cy, CYJSString("Object_prototype"), Object_prototype);
1599
1600     JSObjectRef String(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("String"))));
1601     CYSetProperty(context, cy, CYJSString("String"), String);
1602
1603     JSObjectSetPrototype(context, global, JSObjectMake(context, Runtime_, NULL));
1604
1605     CYSetProperty(context, Array_prototype, toCYON_s, &Array_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1606
1607     JSObjectRef Functor(JSObjectMakeConstructor(context, Functor_, &Functor_new));
1608     JSObjectSetPrototype(context, CYCastJSObject(context, CYGetProperty(context, Functor, prototype_s)), Function_prototype);
1609     CYSetProperty(context, global, CYJSString("Functor"), Functor);
1610
1611     CYSetProperty(context, global, CYJSString("Pointer"), JSObjectMakeConstructor(context, Pointer_, &Pointer_new));
1612     CYSetProperty(context, global, CYJSString("Type"), JSObjectMakeConstructor(context, Type_privateData::Class_, &Type_new));
1613
1614     JSObjectRef cycript(JSObjectMake(context, NULL, NULL));
1615     CYSetProperty(context, global, CYJSString("Cycript"), cycript);
1616     CYSetProperty(context, cycript, CYJSString("gc"), &Cycript_gc_callAsFunction);
1617
1618     CYSetProperty(context, global, CYJSString("$cyq"), &$cyq);
1619
1620     JSObjectRef System(JSObjectMake(context, NULL, NULL));
1621     CYSetProperty(context, cy, CYJSString("System"), Function);
1622
1623     CYSetProperty(context, global, CYJSString("system"), System);
1624     CYSetProperty(context, System, CYJSString("args"), CYJSNull(context));
1625     //CYSetProperty(context, System, CYJSString("global"), global);
1626     CYSetProperty(context, System, CYJSString("print"), &System_print);
1627
1628     if (hooks_ != NULL && hooks_->SetupContext != NULL)
1629         (*hooks_->SetupContext)(context);
1630 }
1631
1632 JSGlobalContextRef CYGetJSContext() {
1633     CYInitialize();
1634
1635     if (Context_ == NULL) {
1636         Context_ = JSGlobalContextCreate(Global_);
1637         CYSetupContext(Context_);
1638     }
1639
1640     return Context_;
1641 }