Execute.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 "Internal.hpp"
  41
  42 #include <dlfcn.h>
  43 #include <iconv.h>
  44
  45 #include "cycript.hpp"
  46
  47 #include "sig/parse.hpp"
  48 #include "sig/ffi_type.hpp"
  49
  50 #include "Pooling.hpp"
  51 #include "Execute.hpp"
  52
  53 #include <sys/mman.h>
  54
  55 #include <iostream>
  56 #include <ext/stdio_filebuf.h>
  57 #include <set>
  58 #include <map>
  59 #include <iomanip>
  60 #include <sstream>
  61 #include <cmath>
  62
  63 #include "Parser.hpp"
  64 #include "Cycript.tab.hh"
  65
  66 #include "Error.hpp"
  67 #include "JavaScript.hpp"
  68 #include "String.hpp"
  69
  70 struct CYHooks *hooks_;
  71
  72 /* JavaScript Properties {{{ */
  73 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, size_t index) {
  74     JSValueRef exception(NULL);
  75     JSValueRef value(JSObjectGetPropertyAtIndex(context, object, index, &exception));
  76     CYThrow(context, exception);
  77     return value;
  78 }
  79
  80 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, JSStringRef name) {
  81     JSValueRef exception(NULL);
  82     JSValueRef value(JSObjectGetProperty(context, object, name, &exception));
  83     CYThrow(context, exception);
  84     return value;
  85 }
  86
  87 void CYSetProperty(JSContextRef context, JSObjectRef object, size_t index, JSValueRef value) {
  88     JSValueRef exception(NULL);
  89     JSObjectSetPropertyAtIndex(context, object, index, value, &exception);
  90     CYThrow(context, exception);
  91 }
  92
  93 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef value, JSPropertyAttributes attributes) {
  94     JSValueRef exception(NULL);
  95     JSObjectSetProperty(context, object, name, value, attributes, &exception);
  96     CYThrow(context, exception);
  97 }
  98
  99 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef (*callback)(JSContextRef, JSObjectRef, JSObjectRef, size_t, const JSValueRef[], JSValueRef *), JSPropertyAttributes attributes) {
 100     CYSetProperty(context, object, name, JSObjectMakeFunctionWithCallback(context, name, callback), attributes);
 101 }
 102 /* }}} */
 103 /* JavaScript Strings {{{ */
 104 JSStringRef CYCopyJSString(const char *value) {
 105     return value == NULL ? NULL : JSStringCreateWithUTF8CString(value);
 106 }
 107
 108 JSStringRef CYCopyJSString(JSStringRef value) {
 109     return value == NULL ? NULL : JSStringRetain(value);
 110 }
 111
 112 JSStringRef CYCopyJSString(CYUTF8String value) {
 113     // XXX: this is very wrong; it needs to convert to UTF16 and then create from there
 114     return CYCopyJSString(value.data);
 115 }
 116
 117 JSStringRef CYCopyJSString(JSContextRef context, JSValueRef value) {
 118     if (JSValueIsNull(context, value))
 119         return NULL;
 120     JSValueRef exception(NULL);
 121     JSStringRef string(JSValueToStringCopy(context, value, &exception));
 122     CYThrow(context, exception);
 123     return string;
 124 }
 125
 126 static CYUTF16String CYCastUTF16String(JSStringRef value) {
 127     return CYUTF16String(JSStringGetCharactersPtr(value), JSStringGetLength(value));
 128 }
 129
 130 CYUTF8String CYPoolUTF8String(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 131     return CYPoolUTF8String(pool, CYCastUTF16String(value));
 132 }
 133
 134 const char *CYPoolCString(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 135     CYUTF8String utf8(CYPoolUTF8String(pool, context, value));
 136     _assert(memchr(utf8.data, '\0', utf8.size) == NULL);
 137     return utf8.data;
 138 }
 139
 140 const char *CYPoolCString(apr_pool_t *pool, JSContextRef context, JSValueRef value) {
 141     return JSValueIsNull(context, value) ? NULL : CYPoolCString(pool, context, CYJSString(context, value));
 142 }
 143 /* }}} */
 144 /* Index Offsets {{{ */
 145 size_t CYGetIndex(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 146     return CYGetIndex(CYPoolUTF8String(pool, context, value));
 147 }
 148 /* }}} */
 149
 150 static JSClassRef All_;
 151 static JSClassRef Context_;
 152 static JSClassRef Functor_;
 153 static JSClassRef Global_;
 154 static JSClassRef Pointer_;
 155 static JSClassRef Struct_;
 156
 157 JSStringRef Array_s;
 158 JSStringRef cy_s;
 159 JSStringRef length_s;
 160 JSStringRef message_s;
 161 JSStringRef name_s;
 162 JSStringRef pop_s;
 163 JSStringRef prototype_s;
 164 JSStringRef push_s;
 165 JSStringRef splice_s;
 166 JSStringRef toCYON_s;
 167 JSStringRef toJSON_s;
 168
 169 static JSStringRef Result_;
 170
 171 void CYFinalize(JSObjectRef object) {
 172     CYData *internal(reinterpret_cast<CYData *>(JSObjectGetPrivate(object)));
 173     if (--internal->count_ == 0)
 174         delete internal;
 175 }
 176
 177 void Structor_(apr_pool_t *pool, sig::Type *&type) {
 178     if (
 179         type->primitive == sig::pointer_P &&
 180         type->data.data.type != NULL &&
 181         type->data.data.type->primitive == sig::struct_P &&
 182         type->data.data.type->name != NULL &&
 183         strcmp(type->data.data.type->name, "_objc_class") == 0
 184     ) {
 185         type->primitive = sig::typename_P;
 186         type->data.data.type = NULL;
 187         return;
 188     }
 189
 190     if (type->primitive != sig::struct_P || type->name == NULL)
 191         return;
 192
 193     size_t length(strlen(type->name));
 194     char keyed[length + 2];
 195     memcpy(keyed + 1, type->name, length + 1);
 196
 197     static const char *modes = "34";
 198     for (size_t i(0); i != 2; ++i) {
 199         char mode(modes[i]);
 200         keyed[0] = mode;
 201
 202         if (CYBridgeEntry *entry = CYBridgeHash(keyed, length + 1))
 203             switch (mode) {
 204                 case '3':
 205                     sig::Parse(pool, &type->data.signature, entry->value_, &Structor_);
 206                 break;
 207
 208                 case '4': {
 209                     sig::Signature signature;
 210                     sig::Parse(pool, &signature, entry->value_, &Structor_);
 211                     type = signature.elements[0].type;
 212                 } break;
 213             }
 214     }
 215 }
 216
 217 JSClassRef Type_privateData::Class_;
 218
 219 struct Context :
 220     CYData
 221 {
 222     JSGlobalContextRef context_;
 223
 224     Context(JSGlobalContextRef context) :
 225         context_(context)
 226     {
 227     }
 228 };
 229
 230 struct Pointer :
 231     CYOwned
 232 {
 233     Type_privateData *type_;
 234     size_t length_;
 235
 236     Pointer(void *value, JSContextRef context, JSObjectRef owner, size_t length, sig::Type *type) :
 237         CYOwned(value, context, owner),
 238         type_(new(pool_) Type_privateData(type)),
 239         length_(length)
 240     {
 241     }
 242 };
 243
 244 struct Struct_privateData :
 245     CYOwned
 246 {
 247     Type_privateData *type_;
 248
 249     Struct_privateData(JSContextRef context, JSObjectRef owner) :
 250         CYOwned(NULL, context, owner)
 251     {
 252     }
 253 };
 254
 255 typedef std::map<const char *, Type_privateData *, CYCStringLess> TypeMap;
 256 static TypeMap Types_;
 257
 258 JSObjectRef CYMakeStruct(JSContextRef context, void *data, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 259     Struct_privateData *internal(new Struct_privateData(context, owner));
 260     apr_pool_t *pool(internal->pool_);
 261     Type_privateData *typical(new(pool) Type_privateData(type, ffi));
 262     internal->type_ = typical;
 263
 264     if (owner != NULL)
 265         internal->value_ = data;
 266     else {
 267         size_t size(typical->GetFFI()->size);
 268         void *copy(apr_palloc(internal->pool_, size));
 269         memcpy(copy, data, size);
 270         internal->value_ = copy;
 271     }
 272
 273     return JSObjectMake(context, Struct_, internal);
 274 }
 275
 276 JSValueRef CYCastJSValue(JSContextRef context, bool value) {
 277     return JSValueMakeBoolean(context, value);
 278 }
 279
 280 JSValueRef CYCastJSValue(JSContextRef context, double value) {
 281     return JSValueMakeNumber(context, value);
 282 }
 283
 284 #define CYCastJSValue_(Type_) \
 285     JSValueRef CYCastJSValue(JSContextRef context, Type_ value) { \
 286         return JSValueMakeNumber(context, static_cast<double>(value)); \
 287     }
 288
 289 CYCastJSValue_(int)
 290 CYCastJSValue_(unsigned int)
 291 CYCastJSValue_(long int)
 292 CYCastJSValue_(long unsigned int)
 293 CYCastJSValue_(long long int)
 294 CYCastJSValue_(long long unsigned int)
 295
 296 JSValueRef CYJSUndefined(JSContextRef context) {
 297     return JSValueMakeUndefined(context);
 298 }
 299
 300 double CYCastDouble(JSContextRef context, JSValueRef value) {
 301     JSValueRef exception(NULL);
 302     double number(JSValueToNumber(context, value, &exception));
 303     CYThrow(context, exception);
 304     return number;
 305 }
 306
 307 bool CYCastBool(JSContextRef context, JSValueRef value) {
 308     return JSValueToBoolean(context, value);
 309 }
 310
 311 JSValueRef CYJSNull(JSContextRef context) {
 312     return JSValueMakeNull(context);
 313 }
 314
 315 JSValueRef CYCastJSValue(JSContextRef context, JSStringRef value) {
 316     return value == NULL ? CYJSNull(context) : JSValueMakeString(context, value);
 317 }
 318
 319 JSValueRef CYCastJSValue(JSContextRef context, const char *value) {
 320     return CYCastJSValue(context, CYJSString(value));
 321 }
 322
 323 JSObjectRef CYCastJSObject(JSContextRef context, JSValueRef value) {
 324     JSValueRef exception(NULL);
 325     JSObjectRef object(JSValueToObject(context, value, &exception));
 326     CYThrow(context, exception);
 327     return object;
 328 }
 329
 330 JSValueRef CYCallAsFunction(JSContextRef context, JSObjectRef function, JSObjectRef _this, size_t count, const JSValueRef arguments[]) {
 331     JSValueRef exception(NULL);
 332     JSValueRef value(JSObjectCallAsFunction(context, function, _this, count, arguments, &exception));
 333     CYThrow(context, exception);
 334     return value;
 335 }
 336
 337 bool CYIsCallable(JSContextRef context, JSValueRef value) {
 338     return value != NULL && JSValueIsObject(context, value) && JSObjectIsFunction(context, (JSObjectRef) value);
 339 }
 340
 341 static JSValueRef System_print(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 342     if (count == 0)
 343         printf("\n");
 344     else {
 345         CYPool pool;
 346         printf("%s\n", CYPoolCString(pool, context, arguments[0]));
 347     }
 348
 349     return CYJSUndefined(context);
 350 } CYCatch }
 351
 352 static size_t Nonce_(0);
 353
 354 static JSValueRef $cyq(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 355     CYPool pool;
 356     const char *name(apr_psprintf(pool, "%s%"APR_SIZE_T_FMT"", CYPoolCString(pool, context, arguments[0]), Nonce_++));
 357     return CYCastJSValue(context, name);
 358 }
 359
 360 static JSValueRef Cycript_gc_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 361     JSGarbageCollect(context);
 362     return CYJSUndefined(context);
 363 }
 364
 365 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSValueRef value, JSValueRef *exception) { CYTry {
 366     switch (JSType type = JSValueGetType(context, value)) {
 367         case kJSTypeUndefined:
 368             return "undefined";
 369         case kJSTypeNull:
 370             return "null";
 371         case kJSTypeBoolean:
 372             return CYCastBool(context, value) ? "true" : "false";
 373
 374         case kJSTypeNumber: {
 375             std::ostringstream str;
 376             CYNumerify(str, CYCastDouble(context, value));
 377             std::string value(str.str());
 378             return apr_pstrmemdup(pool, value.c_str(), value.size());
 379         } break;
 380
 381         case kJSTypeString: {
 382             std::ostringstream str;
 383             CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, value)));
 384             CYStringify(str, string.data, string.size);
 385             std::string value(str.str());
 386             return apr_pstrmemdup(pool, value.c_str(), value.size());
 387         } break;
 388
 389         case kJSTypeObject:
 390             return CYPoolCCYON(pool, context, (JSObjectRef) value);
 391         default:
 392             throw CYJSError(context, "JSValueGetType() == 0x%x", type);
 393     }
 394 } CYCatch }
 395
 396 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSValueRef value) {
 397     JSValueRef exception(NULL);
 398     const char *cyon(CYPoolCCYON(pool, context, value, &exception));
 399     CYThrow(context, exception);
 400     return cyon;
 401 }
 402
 403 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSObjectRef object) {
 404     JSValueRef toCYON(CYGetProperty(context, object, toCYON_s));
 405     if (CYIsCallable(context, toCYON)) {
 406         JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toCYON, object, 0, NULL));
 407         _assert(value != NULL);
 408         return CYPoolCString(pool, context, value);
 409     }
 410
 411     JSValueRef toJSON(CYGetProperty(context, object, toJSON_s));
 412     if (CYIsCallable(context, toJSON)) {
 413         JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 414         JSValueRef exception(NULL);
 415         const char *cyon(CYPoolCCYON(pool, context, CYCallAsFunction(context, (JSObjectRef) toJSON, object, 1, arguments), &exception));
 416         CYThrow(context, exception);
 417         return cyon;
 418     }
 419
 420     std::ostringstream str;
 421
 422     str << '{';
 423
 424     // XXX: this is, sadly, going to leak
 425     JSPropertyNameArrayRef names(JSObjectCopyPropertyNames(context, object));
 426
 427     bool comma(false);
 428
 429     for (size_t index(0), count(JSPropertyNameArrayGetCount(names)); index != count; ++index) {
 430         JSStringRef name(JSPropertyNameArrayGetNameAtIndex(names, index));
 431         JSValueRef value(CYGetProperty(context, object, name));
 432
 433         if (comma)
 434             str << ',';
 435         else
 436             comma = true;
 437
 438         CYUTF8String string(CYPoolUTF8String(pool, context, name));
 439         if (CYIsKey(string))
 440             str << string.data;
 441         else
 442             CYStringify(str, string.data, string.size);
 443
 444         str << ':' << CYPoolCCYON(pool, context, value);
 445     }
 446
 447     str << '}';
 448
 449     JSPropertyNameArrayRelease(names);
 450
 451     std::string string(str.str());
 452     return apr_pstrmemdup(pool, string.c_str(), string.size());
 453 }
 454
 455 static JSValueRef Array_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 456     CYPool pool;
 457     std::ostringstream str;
 458
 459     str << '[';
 460
 461     JSValueRef length(CYGetProperty(context, _this, length_s));
 462     bool comma(false);
 463
 464     for (size_t index(0), count(CYCastDouble(context, length)); index != count; ++index) {
 465         JSValueRef value(CYGetProperty(context, _this, index));
 466
 467         if (comma)
 468             str << ',';
 469         else
 470             comma = true;
 471
 472         if (!JSValueIsUndefined(context, value))
 473             str << CYPoolCCYON(pool, context, value);
 474         else {
 475             str << ',';
 476             comma = false;
 477         }
 478     }
 479
 480     str << ']';
 481
 482     std::string value(str.str());
 483     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 484 } CYCatch }
 485
 486 JSObjectRef CYMakePointer(JSContextRef context, void *pointer, size_t length, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 487     Pointer *internal(new Pointer(pointer, context, owner, length, type));
 488     return JSObjectMake(context, Pointer_, internal);
 489 }
 490
 491 static JSObjectRef CYMakeFunctor(JSContextRef context, void (*function)(), const char *type, void **cache = NULL) {
 492     cy::Functor *internal;
 493
 494     if (cache != NULL && *cache != NULL) {
 495         internal = reinterpret_cast<cy::Functor *>(*cache);
 496         ++internal->count_;
 497     } else {
 498         internal = new cy::Functor(type, function);
 499
 500         if (cache != NULL) {
 501             *cache = internal;
 502             ++internal->count_;
 503         }
 504     }
 505
 506     return JSObjectMake(context, Functor_, internal);
 507 }
 508
 509 static bool CYGetOffset(apr_pool_t *pool, JSContextRef context, JSStringRef value, ssize_t &index) {
 510     return CYGetOffset(CYPoolCString(pool, context, value), index);
 511 }
 512
 513 void *CYCastPointer_(JSContextRef context, JSValueRef value) {
 514     switch (JSValueGetType(context, value)) {
 515         case kJSTypeNull:
 516             return NULL;
 517         /*case kJSTypeObject:
 518             if (JSValueIsObjectOfClass(context, value, Pointer_)) {
 519                 Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate((JSObjectRef) value)));
 520                 return internal->value_;
 521             }*/
 522         default:
 523             double number(CYCastDouble(context, value));
 524             if (std::isnan(number))
 525                 throw CYJSError(context, "cannot convert value to pointer");
 526             return reinterpret_cast<void *>(static_cast<uintptr_t>(static_cast<long long>(number)));
 527     }
 528 }
 529
 530 void CYPoolFFI(apr_pool_t *pool, JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, JSValueRef value) {
 531     switch (type->primitive) {
 532         case sig::boolean_P:
 533             *reinterpret_cast<bool *>(data) = JSValueToBoolean(context, value);
 534         break;
 535
 536 #define CYPoolFFI_(primitive, native) \
 537         case sig::primitive ## _P: \
 538             *reinterpret_cast<native *>(data) = CYCastDouble(context, value); \
 539         break;
 540
 541         CYPoolFFI_(uchar, unsigned char)
 542         CYPoolFFI_(char, char)
 543         CYPoolFFI_(ushort, unsigned short)
 544         CYPoolFFI_(short, short)
 545         CYPoolFFI_(ulong, unsigned long)
 546         CYPoolFFI_(long, long)
 547         CYPoolFFI_(uint, unsigned int)
 548         CYPoolFFI_(int, int)
 549         CYPoolFFI_(ulonglong, unsigned long long)
 550         CYPoolFFI_(longlong, long long)
 551         CYPoolFFI_(float, float)
 552         CYPoolFFI_(double, double)
 553
 554         case sig::array_P: {
 555             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 556             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 557             for (size_t index(0); index != type->data.data.size; ++index) {
 558                 ffi_type *field(ffi->elements[index]);
 559
 560                 JSValueRef rhs;
 561                 if (aggregate == NULL)
 562                     rhs = value;
 563                 else {
 564                     rhs = CYGetProperty(context, aggregate, index);
 565                     if (JSValueIsUndefined(context, rhs))
 566                         throw CYJSError(context, "unable to extract array value");
 567                 }
 568
 569                 CYPoolFFI(pool, context, type->data.data.type, field, base, rhs);
 570                 // XXX: alignment?
 571                 base += field->size;
 572             }
 573         } break;
 574
 575         case sig::pointer_P:
 576             *reinterpret_cast<void **>(data) = CYCastPointer<void *>(context, value);
 577         break;
 578
 579         case sig::string_P:
 580             *reinterpret_cast<const char **>(data) = CYPoolCString(pool, context, value);
 581         break;
 582
 583         case sig::struct_P: {
 584             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 585             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 586             for (size_t index(0); index != type->data.signature.count; ++index) {
 587                 sig::Element *element(&type->data.signature.elements[index]);
 588                 ffi_type *field(ffi->elements[index]);
 589
 590                 JSValueRef rhs;
 591                 if (aggregate == NULL)
 592                     rhs = value;
 593                 else {
 594                     rhs = CYGetProperty(context, aggregate, index);
 595                     if (JSValueIsUndefined(context, rhs)) {
 596                         if (element->name != NULL)
 597                             rhs = CYGetProperty(context, aggregate, CYJSString(element->name));
 598                         else
 599                             goto undefined;
 600                         if (JSValueIsUndefined(context, rhs)) undefined:
 601                             throw CYJSError(context, "unable to extract structure value");
 602                     }
 603                 }
 604
 605                 CYPoolFFI(pool, context, element->type, field, base, rhs);
 606                 // XXX: alignment?
 607                 base += field->size;
 608             }
 609         } break;
 610
 611         case sig::void_P:
 612         break;
 613
 614         default:
 615             if (hooks_ != NULL && hooks_->PoolFFI != NULL)
 616                 if ((*hooks_->PoolFFI)(pool, context, type, ffi, data, value))
 617                     return;
 618
 619             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 620     }
 621 }
 622
 623 JSValueRef CYFromFFI(JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, bool initialize, JSObjectRef owner) {
 624     switch (type->primitive) {
 625         case sig::boolean_P:
 626             return CYCastJSValue(context, *reinterpret_cast<bool *>(data));
 627
 628 #define CYFromFFI_(primitive, native) \
 629         case sig::primitive ## _P: \
 630             return CYCastJSValue(context, *reinterpret_cast<native *>(data)); \
 631
 632         CYFromFFI_(uchar, unsigned char)
 633         CYFromFFI_(char, char)
 634         CYFromFFI_(ushort, unsigned short)
 635         CYFromFFI_(short, short)
 636         CYFromFFI_(ulong, unsigned long)
 637         CYFromFFI_(long, long)
 638         CYFromFFI_(uint, unsigned int)
 639         CYFromFFI_(int, int)
 640         CYFromFFI_(ulonglong, unsigned long long)
 641         CYFromFFI_(longlong, long long)
 642         CYFromFFI_(float, float)
 643         CYFromFFI_(double, double)
 644
 645         case sig::array_P:
 646             if (void *pointer = data)
 647                 return CYMakePointer(context, pointer, type->data.data.size, type->data.data.type, NULL, owner);
 648             else goto null;
 649
 650         case sig::pointer_P:
 651             if (void *pointer = *reinterpret_cast<void **>(data))
 652                 return CYMakePointer(context, pointer, _not(size_t), type->data.data.type, NULL, owner);
 653             else goto null;
 654
 655         case sig::string_P:
 656             if (char *utf8 = *reinterpret_cast<char **>(data))
 657                 return CYCastJSValue(context, utf8);
 658             else goto null;
 659
 660         case sig::struct_P:
 661             return CYMakeStruct(context, data, type, ffi, owner);
 662         case sig::void_P:
 663             return CYJSUndefined(context);
 664
 665         null:
 666             return CYJSNull(context);
 667         default:
 668             if (hooks_ != NULL && hooks_->FromFFI != NULL)
 669                 if (JSValueRef value = (*hooks_->FromFFI)(context, type, ffi, data, initialize, owner))
 670                     return value;
 671
 672             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 673     }
 674 }
 675
 676 static void FunctionClosure_(ffi_cif *cif, void *result, void **arguments, void *arg) {
 677     Closure_privateData *internal(reinterpret_cast<Closure_privateData *>(arg));
 678
 679     JSContextRef context(internal->context_);
 680
 681     size_t count(internal->cif_.nargs);
 682     JSValueRef values[count];
 683
 684     for (size_t index(0); index != count; ++index)
 685         values[index] = CYFromFFI(context, internal->signature_.elements[1 + index].type, internal->cif_.arg_types[index], arguments[index]);
 686
 687     JSValueRef value(CYCallAsFunction(context, internal->function_, NULL, count, values));
 688     CYPoolFFI(NULL, context, internal->signature_.elements[0].type, internal->cif_.rtype, result, value);
 689 }
 690
 691 Closure_privateData *CYMakeFunctor_(JSContextRef context, JSObjectRef function, const char *type, void (*callback)(ffi_cif *, void *, void **, void *)) {
 692     // XXX: in case of exceptions this will leak
 693     // XXX: in point of fact, this may /need/ to leak :(
 694     Closure_privateData *internal(new Closure_privateData(context, function, type));
 695
 696     ffi_closure *closure((ffi_closure *) _syscall(mmap(
 697         NULL, sizeof(ffi_closure),
 698         PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE,
 699         -1, 0
 700     )));
 701
 702     ffi_status status(ffi_prep_closure(closure, &internal->cif_, callback, internal));
 703     _assert(status == FFI_OK);
 704
 705     _syscall(mprotect(closure, sizeof(*closure), PROT_READ | PROT_EXEC));
 706
 707     internal->value_ = closure;
 708
 709     return internal;
 710 }
 711
 712 static JSObjectRef CYMakeFunctor(JSContextRef context, JSObjectRef function, const char *type) {
 713     Closure_privateData *internal(CYMakeFunctor_(context, function, type, &FunctionClosure_));
 714     JSObjectRef object(JSObjectMake(context, Functor_, internal));
 715     // XXX: see above notes about needing to leak
 716     JSValueProtect(CYGetJSContext(context), object);
 717     return object;
 718 }
 719
 720 JSObjectRef CYGetCachedObject(JSContextRef context, JSStringRef name) {
 721     return CYCastJSObject(context, CYGetProperty(context, CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s)), name));
 722 }
 723
 724 static JSObjectRef CYMakeFunctor(JSContextRef context, JSValueRef value, const char *type) {
 725     JSObjectRef Function(CYGetCachedObject(context, CYJSString("Function")));
 726
 727     JSValueRef exception(NULL);
 728     bool function(JSValueIsInstanceOfConstructor(context, value, Function, &exception));
 729     CYThrow(context, exception);
 730
 731     if (function) {
 732         JSObjectRef function(CYCastJSObject(context, value));
 733         return CYMakeFunctor(context, function, type);
 734     } else {
 735         void (*function)()(CYCastPointer<void (*)()>(context, value));
 736         return CYMakeFunctor(context, function, type);
 737     }
 738 }
 739
 740 static bool Index_(apr_pool_t *pool, JSContextRef context, Struct_privateData *internal, JSStringRef property, ssize_t &index, uint8_t *&base) {
 741     Type_privateData *typical(internal->type_);
 742     sig::Type *type(typical->type_);
 743     if (type == NULL)
 744         return false;
 745
 746     const char *name(CYPoolCString(pool, context, property));
 747     size_t length(strlen(name));
 748     double number(CYCastDouble(name, length));
 749
 750     size_t count(type->data.signature.count);
 751
 752     if (std::isnan(number)) {
 753         if (property == NULL)
 754             return false;
 755
 756         sig::Element *elements(type->data.signature.elements);
 757
 758         for (size_t local(0); local != count; ++local) {
 759             sig::Element *element(&elements[local]);
 760             if (element->name != NULL && strcmp(name, element->name) == 0) {
 761                 index = local;
 762                 goto base;
 763             }
 764         }
 765
 766         return false;
 767     } else {
 768         index = static_cast<ssize_t>(number);
 769         if (index != number || index < 0 || static_cast<size_t>(index) >= count)
 770             return false;
 771     }
 772
 773   base:
 774     ffi_type **elements(typical->GetFFI()->elements);
 775
 776     base = reinterpret_cast<uint8_t *>(internal->value_);
 777     for (ssize_t local(0); local != index; ++local)
 778         base += elements[local]->size;
 779
 780     return true;
 781 }
 782
 783 static JSValueRef Pointer_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 784     CYPool pool;
 785     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 786
 787     if (JSStringIsEqual(property, length_s))
 788         return internal->length_ == _not(size_t) ? CYJSUndefined(context) : CYCastJSValue(context, internal->length_);
 789
 790     Type_privateData *typical(internal->type_);
 791
 792     if (typical->type_ == NULL)
 793         return NULL;
 794
 795     ssize_t offset;
 796     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 797         offset = 0;
 798     else if (!CYGetOffset(pool, context, property, offset))
 799         return NULL;
 800
 801     ffi_type *ffi(typical->GetFFI());
 802
 803     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 804     base += ffi->size * offset;
 805
 806     JSObjectRef owner(internal->GetOwner() ?: object);
 807     return CYFromFFI(context, typical->type_, ffi, base, false, owner);
 808 } CYCatch }
 809
 810 static bool Pointer_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 811     CYPool pool;
 812     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 813     Type_privateData *typical(internal->type_);
 814
 815     if (typical->type_ == NULL)
 816         return NULL;
 817
 818     ssize_t offset;
 819     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 820         offset = 0;
 821     else if (!CYGetOffset(pool, context, property, offset))
 822         return NULL;
 823
 824     ffi_type *ffi(typical->GetFFI());
 825
 826     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 827     base += ffi->size * offset;
 828
 829     CYPoolFFI(NULL, context, typical->type_, ffi, base, value);
 830     return true;
 831 } CYCatch }
 832
 833 static JSValueRef Struct_callAsFunction_$cya(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 834     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(_this)));
 835     Type_privateData *typical(internal->type_);
 836     return CYMakePointer(context, internal->value_, _not(size_t), typical->type_, typical->ffi_, _this);
 837 }
 838
 839 static JSValueRef Struct_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 840     CYPool pool;
 841     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 842     Type_privateData *typical(internal->type_);
 843
 844     ssize_t index;
 845     uint8_t *base;
 846
 847     if (!Index_(pool, context, internal, property, index, base))
 848         return NULL;
 849
 850     JSObjectRef owner(internal->GetOwner() ?: object);
 851
 852     return CYFromFFI(context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, false, owner);
 853 } CYCatch }
 854
 855 static bool Struct_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 856     CYPool pool;
 857     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 858     Type_privateData *typical(internal->type_);
 859
 860     ssize_t index;
 861     uint8_t *base;
 862
 863     if (!Index_(pool, context, internal, property, index, base))
 864         return false;
 865
 866     CYPoolFFI(NULL, context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, value);
 867     return true;
 868 } CYCatch }
 869
 870 static void Struct_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
 871     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 872     Type_privateData *typical(internal->type_);
 873     sig::Type *type(typical->type_);
 874
 875     if (type == NULL)
 876         return;
 877
 878     size_t count(type->data.signature.count);
 879     sig::Element *elements(type->data.signature.elements);
 880
 881     char number[32];
 882
 883     for (size_t index(0); index != count; ++index) {
 884         const char *name;
 885         name = elements[index].name;
 886
 887         if (name == NULL) {
 888             sprintf(number, "%zu", index);
 889             name = number;
 890         }
 891
 892         JSPropertyNameAccumulatorAddName(names, CYJSString(name));
 893     }
 894 }
 895
 896 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 {
 897     if (setups + count != signature->count - 1)
 898         throw CYJSError(context, "incorrect number of arguments to ffi function");
 899
 900     size_t size(setups + count);
 901     void *values[size];
 902     memcpy(values, setup, sizeof(void *) * setups);
 903
 904     for (size_t index(setups); index != size; ++index) {
 905         sig::Element *element(&signature->elements[index + 1]);
 906         ffi_type *ffi(cif->arg_types[index]);
 907         // XXX: alignment?
 908         values[index] = new(pool) uint8_t[ffi->size];
 909         CYPoolFFI(pool, context, element->type, ffi, values[index], arguments[index - setups]);
 910     }
 911
 912     uint8_t value[cif->rtype->size];
 913
 914     if (hooks_ != NULL && hooks_->CallFunction != NULL)
 915         (*hooks_->CallFunction)(context, cif, function, value, values);
 916     else
 917         ffi_call(cif, function, value, values);
 918
 919     return CYFromFFI(context, signature->elements[0].type, cif->rtype, value, initialize);
 920 } CYCatch }
 921
 922 static JSValueRef Functor_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 923     CYPool pool;
 924     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
 925     return CYCallFunction(pool, context, 0, NULL, count, arguments, false, exception, &internal->signature_, &internal->cif_, internal->GetValue());
 926 }
 927
 928 static JSObjectRef CYMakeType(JSContextRef context, const char *type) {
 929     Type_privateData *internal(new Type_privateData(type));
 930     return JSObjectMake(context, Type_privateData::Class_, internal);
 931 }
 932
 933 static JSObjectRef CYMakeType(JSContextRef context, sig::Type *type) {
 934     Type_privateData *internal(new Type_privateData(type));
 935     return JSObjectMake(context, Type_privateData::Class_, internal);
 936 }
 937
 938 static void *CYCastSymbol(const char *name) {
 939     return dlsym(RTLD_DEFAULT, name);
 940 }
 941
 942 static JSValueRef All_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 943     JSObjectRef global(CYGetGlobalObject(context));
 944     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
 945     if (JSValueRef value = CYGetProperty(context, cycript, property))
 946         if (!JSValueIsUndefined(context, value))
 947             return value;
 948
 949     CYPool pool;
 950     CYUTF8String name(CYPoolUTF8String(pool, context, property));
 951
 952     if (hooks_ != NULL && hooks_->RuntimeProperty != NULL)
 953         if (JSValueRef value = (*hooks_->RuntimeProperty)(context, name))
 954             return value;
 955
 956     size_t length(name.size);
 957     char keyed[length + 2];
 958     memcpy(keyed + 1, name.data, length + 1);
 959
 960     static const char *modes = "0124";
 961     for (size_t i(0); i != 4; ++i) {
 962         char mode(modes[i]);
 963         keyed[0] = mode;
 964
 965         if (CYBridgeEntry *entry = CYBridgeHash(keyed, length + 1))
 966             switch (mode) {
 967                 case '0':
 968                     return JSEvaluateScript(CYGetJSContext(context), CYJSString(entry->value_), NULL, NULL, 0, NULL);
 969
 970                 case '1':
 971                     if (void (*symbol)() = reinterpret_cast<void (*)()>(CYCastSymbol(name.data)))
 972                         return CYMakeFunctor(context, symbol, entry->value_, &entry->cache_);
 973                     else return NULL;
 974
 975                 case '2':
 976                     if (void *symbol = CYCastSymbol(name.data)) {
 977                         // XXX: this is horrendously inefficient
 978                         sig::Signature signature;
 979                         sig::Parse(pool, &signature, entry->value_, &Structor_);
 980                         ffi_cif cif;
 981                         sig::sig_ffi_cif(pool, &sig::ObjectiveC, &signature, &cif);
 982                         return CYFromFFI(context, signature.elements[0].type, cif.rtype, symbol);
 983                     } else return NULL;
 984
 985                 // XXX: implement case 3
 986                 case '4':
 987                     return CYMakeType(context, entry->value_);
 988             }
 989     }
 990
 991     return NULL;
 992 } CYCatch }
 993
 994 static JSObjectRef Pointer_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 995     if (count != 2)
 996         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
 997
 998     CYPool pool;
 999
1000     void *value(CYCastPointer<void *>(context, arguments[0]));
1001     const char *type(CYPoolCString(pool, context, arguments[1]));
1002
1003     sig::Signature signature;
1004     sig::Parse(pool, &signature, type, &Structor_);
1005
1006     return CYMakePointer(context, value, _not(size_t), signature.elements[0].type, NULL, NULL);
1007 } CYCatch }
1008
1009 static JSObjectRef Type_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1010     if (count != 1)
1011         throw CYJSError(context, "incorrect number of arguments to Type constructor");
1012     CYPool pool;
1013     const char *type(CYPoolCString(pool, context, arguments[0]));
1014     return CYMakeType(context, type);
1015 } CYCatch }
1016
1017 static JSValueRef Type_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1018     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1019
1020     sig::Type type;
1021
1022     if (JSStringIsEqualToUTF8CString(property, "$cyi")) {
1023         type.primitive = sig::pointer_P;
1024         type.data.data.size = 0;
1025     } else {
1026         CYPool pool;
1027         size_t index(CYGetIndex(pool, context, property));
1028         if (index == _not(size_t))
1029             return NULL;
1030         type.primitive = sig::array_P;
1031         type.data.data.size = index;
1032     }
1033
1034     type.name = NULL;
1035     type.flags = 0;
1036
1037     type.data.data.type = internal->type_;
1038
1039     return CYMakeType(context, &type);
1040 } CYCatch }
1041
1042 static JSValueRef Type_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1043     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1044
1045     if (count != 1)
1046         throw CYJSError(context, "incorrect number of arguments to type cast function");
1047     sig::Type *type(internal->type_);
1048     ffi_type *ffi(internal->GetFFI());
1049     // XXX: alignment?
1050     uint8_t value[ffi->size];
1051     CYPool pool;
1052     CYPoolFFI(pool, context, type, ffi, value, arguments[0]);
1053     return CYFromFFI(context, type, ffi, value);
1054 } CYCatch }
1055
1056 static JSObjectRef Type_callAsConstructor(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1057     if (count != 0)
1058         throw CYJSError(context, "incorrect number of arguments to type cast function");
1059     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1060
1061     sig::Type *type(internal->type_);
1062     size_t length;
1063
1064     if (type->primitive != sig::array_P)
1065         length = _not(size_t);
1066     else {
1067         length = type->data.data.size;
1068         type = type->data.data.type;
1069     }
1070
1071     void *value(malloc(internal->GetFFI()->size));
1072     return CYMakePointer(context, value, length, type, NULL, NULL);
1073 } CYCatch }
1074
1075 static JSObjectRef Functor_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1076     if (count != 2)
1077         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1078     CYPool pool;
1079     const char *type(CYPoolCString(pool, context, arguments[1]));
1080     return CYMakeFunctor(context, arguments[0], type);
1081 } CYCatch }
1082
1083 static JSValueRef CYValue_callAsFunction_valueOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1084     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1085     return CYCastJSValue(context, reinterpret_cast<uintptr_t>(internal->value_));
1086 } CYCatch }
1087
1088 static JSValueRef CYValue_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1089     return CYValue_callAsFunction_valueOf(context, object, _this, count, arguments, exception);
1090 }
1091
1092 static JSValueRef CYValue_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1093     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1094     char string[32];
1095     sprintf(string, "%p", internal->value_);
1096     return CYCastJSValue(context, string);
1097 } CYCatch }
1098
1099 static JSValueRef Pointer_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1100     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(_this)));
1101     if (internal->length_ != _not(size_t)) {
1102         JSObjectRef Array(CYGetCachedObject(context, Array_s));
1103         JSObjectRef toCYON(CYCastJSObject(context, CYGetProperty(context, Array, toCYON_s)));
1104         return CYCallAsFunction(context, toCYON, _this, count, arguments);
1105     } else {
1106         char string[32];
1107         sprintf(string, "%p", internal->value_);
1108         return CYCastJSValue(context, string);
1109     }
1110 } CYCatch }
1111
1112 static JSValueRef Type_callAsFunction_toString(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1113     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1114     CYPool pool;
1115     const char *type(sig::Unparse(pool, internal->type_));
1116     return CYCastJSValue(context, CYJSString(type));
1117 } CYCatch }
1118
1119 static JSValueRef Type_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1120     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1121     CYPool pool;
1122     const char *type(sig::Unparse(pool, internal->type_));
1123     size_t size(strlen(type));
1124     char *cyon(new(pool) char[12 + size + 1]);
1125     memcpy(cyon, "new Type(\"", 10);
1126     cyon[12 + size] = '\0';
1127     cyon[12 + size - 2] = '"';
1128     cyon[12 + size - 1] = ')';
1129     memcpy(cyon + 10, type, size);
1130     return CYCastJSValue(context, CYJSString(cyon));
1131 } CYCatch }
1132
1133 static JSValueRef Type_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1134     return Type_callAsFunction_toString(context, object, _this, count, arguments, exception);
1135 }
1136
1137 static JSStaticFunction Pointer_staticFunctions[4] = {
1138     {"toCYON", &Pointer_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1139     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1140     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1141     {NULL, NULL, 0}
1142 };
1143
1144 static JSStaticFunction Struct_staticFunctions[2] = {
1145     {"$cya", &Struct_callAsFunction_$cya, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1146     {NULL, NULL, 0}
1147 };
1148
1149 static JSStaticFunction Functor_staticFunctions[4] = {
1150     {"toCYON", &CYValue_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1151     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1152     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1153     {NULL, NULL, 0}
1154 };
1155
1156 namespace cy {
1157     JSStaticFunction const * const Functor::StaticFunctions = Functor_staticFunctions;
1158 }
1159
1160 static JSStaticFunction Type_staticFunctions[4] = {
1161     {"toCYON", &Type_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1162     {"toJSON", &Type_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1163     {"toString", &Type_callAsFunction_toString, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1164     {NULL, NULL, 0}
1165 };
1166
1167 static JSObjectRef (*JSObjectMakeArray$)(JSContextRef, size_t, const JSValueRef[], JSValueRef *);
1168
1169 void CYSetArgs(int argc, const char *argv[]) {
1170     JSContextRef context(CYGetJSContext());
1171     JSValueRef args[argc];
1172     for (int i(0); i != argc; ++i)
1173         args[i] = CYCastJSValue(context, argv[i]);
1174
1175     JSObjectRef array;
1176     if (JSObjectMakeArray$ != NULL) {
1177         JSValueRef exception(NULL);
1178         array = (*JSObjectMakeArray$)(context, argc, args, &exception);
1179         CYThrow(context, exception);
1180     } else {
1181         JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array")));
1182         JSValueRef value(CYCallAsFunction(context, Array, NULL, argc, args));
1183         array = CYCastJSObject(context, value);
1184     }
1185
1186     JSObjectRef System(CYGetCachedObject(context, CYJSString("System")));
1187     CYSetProperty(context, System, CYJSString("args"), array);
1188 }
1189
1190 JSObjectRef CYGetGlobalObject(JSContextRef context) {
1191     return JSContextGetGlobalObject(context);
1192 }
1193
1194 const char *CYExecute(apr_pool_t *pool, const char *code) {
1195     JSContextRef context(CYGetJSContext());
1196     JSValueRef exception(NULL), result;
1197
1198     void *handle;
1199     if (hooks_ != NULL && hooks_->ExecuteStart != NULL)
1200         handle = (*hooks_->ExecuteStart)(context);
1201     else
1202         handle = NULL;
1203
1204     const char *json;
1205
1206     try {
1207         result = JSEvaluateScript(context, CYJSString(code), NULL, NULL, 0, &exception);
1208     } catch (const char *error) {
1209         return error;
1210     }
1211
1212     if (exception != NULL) { error:
1213         result = exception;
1214         exception = NULL;
1215     }
1216
1217     if (JSValueIsUndefined(context, result))
1218         return NULL;
1219
1220     try {
1221         json = CYPoolCCYON(pool, context, result, &exception);
1222     } catch (const char *error) {
1223         return error;
1224     }
1225
1226     if (exception != NULL)
1227         goto error;
1228
1229     CYSetProperty(context, CYGetGlobalObject(context), Result_, result);
1230
1231     if (hooks_ != NULL && hooks_->ExecuteEnd != NULL)
1232         (*hooks_->ExecuteEnd)(context, handle);
1233     return json;
1234 }
1235
1236 extern "C" void CydgetSetupContext(JSGlobalContextRef context) {
1237     CYSetupContext(context);
1238 }
1239
1240 static bool initialized_ = false;
1241
1242 void CYInitializeDynamic() {
1243     if (!initialized_)
1244         initialized_ = true;
1245     else return;
1246
1247     CYInitializeStatic();
1248
1249     JSObjectMakeArray$ = reinterpret_cast<JSObjectRef (*)(JSContextRef, size_t, const JSValueRef[], JSValueRef *)>(dlsym(RTLD_DEFAULT, "JSObjectMakeArray"));
1250
1251     JSClassDefinition definition;
1252
1253     definition = kJSClassDefinitionEmpty;
1254     definition.className = "All";
1255     definition.getProperty = &All_getProperty;
1256     All_ = JSClassCreate(&definition);
1257
1258     definition = kJSClassDefinitionEmpty;
1259     definition.className = "Context";
1260     definition.finalize = &CYFinalize;
1261     Context_ = JSClassCreate(&definition);
1262
1263     definition = kJSClassDefinitionEmpty;
1264     definition.className = "Functor";
1265     definition.staticFunctions = cy::Functor::StaticFunctions;
1266     definition.callAsFunction = &Functor_callAsFunction;
1267     definition.finalize = &CYFinalize;
1268     Functor_ = JSClassCreate(&definition);
1269
1270     definition = kJSClassDefinitionEmpty;
1271     definition.className = "Pointer";
1272     definition.staticFunctions = Pointer_staticFunctions;
1273     definition.getProperty = &Pointer_getProperty;
1274     definition.setProperty = &Pointer_setProperty;
1275     definition.finalize = &CYFinalize;
1276     Pointer_ = JSClassCreate(&definition);
1277
1278     definition = kJSClassDefinitionEmpty;
1279     definition.className = "Struct";
1280     definition.staticFunctions = Struct_staticFunctions;
1281     definition.getProperty = &Struct_getProperty;
1282     definition.setProperty = &Struct_setProperty;
1283     definition.getPropertyNames = &Struct_getPropertyNames;
1284     definition.finalize = &CYFinalize;
1285     Struct_ = JSClassCreate(&definition);
1286
1287     definition = kJSClassDefinitionEmpty;
1288     definition.className = "Type";
1289     definition.staticFunctions = Type_staticFunctions;
1290     definition.getProperty = &Type_getProperty;
1291     definition.callAsFunction = &Type_callAsFunction;
1292     definition.callAsConstructor = &Type_callAsConstructor;
1293     definition.finalize = &CYFinalize;
1294     Type_privateData::Class_ = JSClassCreate(&definition);
1295
1296     definition = kJSClassDefinitionEmpty;
1297     //definition.getProperty = &Global_getProperty;
1298     Global_ = JSClassCreate(&definition);
1299
1300     Array_s = JSStringCreateWithUTF8CString("Array");
1301     cy_s = JSStringCreateWithUTF8CString("$cy");
1302     length_s = JSStringCreateWithUTF8CString("length");
1303     message_s = JSStringCreateWithUTF8CString("message");
1304     name_s = JSStringCreateWithUTF8CString("name");
1305     pop_s = JSStringCreateWithUTF8CString("pop");
1306     prototype_s = JSStringCreateWithUTF8CString("prototype");
1307     push_s = JSStringCreateWithUTF8CString("push");
1308     splice_s = JSStringCreateWithUTF8CString("splice");
1309     toCYON_s = JSStringCreateWithUTF8CString("toCYON");
1310     toJSON_s = JSStringCreateWithUTF8CString("toJSON");
1311
1312     Result_ = JSStringCreateWithUTF8CString("_");
1313
1314     if (hooks_ != NULL && hooks_->Initialize != NULL)
1315         (*hooks_->Initialize)();
1316 }
1317
1318 void CYThrow(JSContextRef context, JSValueRef value) {
1319     if (value != NULL)
1320         throw CYJSError(context, value);
1321 }
1322
1323 const char *CYJSError::PoolCString(apr_pool_t *pool) const {
1324     // XXX: this used to be CYPoolCString
1325     return CYPoolCCYON(pool, context_, value_);
1326 }
1327
1328 JSValueRef CYJSError::CastJSValue(JSContextRef context) const {
1329     // XXX: what if the context is different?
1330     return value_;
1331 }
1332
1333 JSValueRef CYCastJSError(JSContextRef context, const char *message) {
1334     JSObjectRef Error(CYGetCachedObject(context, CYJSString("Error")));
1335
1336     JSValueRef arguments[1] = {CYCastJSValue(context, message)};
1337
1338     JSValueRef exception(NULL);
1339     JSValueRef value(JSObjectCallAsConstructor(context, Error, 1, arguments, &exception));
1340     CYThrow(context, exception);
1341
1342     return value;
1343 }
1344
1345 JSValueRef CYPoolError::CastJSValue(JSContextRef context) const {
1346     return CYCastJSError(context, message_);
1347 }
1348
1349 CYJSError::CYJSError(JSContextRef context, const char *format, ...) {
1350     _assert(context != NULL);
1351
1352     CYPool pool;
1353
1354     va_list args;
1355     va_start(args, format);
1356     const char *message(apr_pvsprintf(pool, format, args));
1357     va_end(args);
1358
1359     value_ = CYCastJSError(context, message);
1360 }
1361
1362 JSGlobalContextRef CYGetJSContext(JSContextRef context) {
1363     return reinterpret_cast<Context *>(JSObjectGetPrivate(CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s))))->context_;
1364 }
1365
1366 extern "C" void CYSetupContext(JSGlobalContextRef context) {
1367     CYInitializeDynamic();
1368
1369     JSObjectRef global(CYGetGlobalObject(context));
1370
1371     JSObjectRef cy(JSObjectMake(context, Context_, new Context(context)));
1372     CYSetProperty(context, global, cy_s, cy, kJSPropertyAttributeDontEnum);
1373
1374 /* Cache Globals {{{ */
1375     JSObjectRef Array(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Array"))));
1376     CYSetProperty(context, cy, CYJSString("Array"), Array);
1377
1378     JSObjectRef Array_prototype(CYCastJSObject(context, CYGetProperty(context, Array, prototype_s)));
1379     CYSetProperty(context, cy, CYJSString("Array_prototype"), Array_prototype);
1380
1381     JSObjectRef Error(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Error"))));
1382     CYSetProperty(context, cy, CYJSString("Error"), Error);
1383
1384     JSObjectRef Function(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Function"))));
1385     CYSetProperty(context, cy, CYJSString("Function"), Function);
1386
1387     JSObjectRef Function_prototype(CYCastJSObject(context, CYGetProperty(context, Function, prototype_s)));
1388     CYSetProperty(context, cy, CYJSString("Function_prototype"), Function_prototype);
1389
1390     JSObjectRef Object(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Object"))));
1391     CYSetProperty(context, cy, CYJSString("Object"), Object);
1392
1393     JSObjectRef Object_prototype(CYCastJSObject(context, CYGetProperty(context, Object, prototype_s)));
1394     CYSetProperty(context, cy, CYJSString("Object_prototype"), Object_prototype);
1395
1396     JSObjectRef String(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("String"))));
1397     CYSetProperty(context, cy, CYJSString("String"), String);
1398 /* }}} */
1399
1400     CYSetProperty(context, Array_prototype, toCYON_s, &Array_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1401
1402     JSObjectRef cycript(JSObjectMake(context, NULL, NULL));
1403     CYSetProperty(context, global, CYJSString("Cycript"), cycript);
1404     CYSetProperty(context, cycript, CYJSString("gc"), &Cycript_gc_callAsFunction);
1405
1406     JSObjectRef Functor(JSObjectMakeConstructor(context, Functor_, &Functor_new));
1407     JSObjectSetPrototype(context, CYCastJSObject(context, CYGetProperty(context, Functor, prototype_s)), Function_prototype);
1408     CYSetProperty(context, cycript, CYJSString("Functor"), Functor);
1409
1410     CYSetProperty(context, cycript, CYJSString("Pointer"), JSObjectMakeConstructor(context, Pointer_, &Pointer_new));
1411     CYSetProperty(context, cycript, CYJSString("Type"), JSObjectMakeConstructor(context, Type_privateData::Class_, &Type_new));
1412
1413     JSObjectRef all(JSObjectMake(context, All_, NULL));
1414     CYSetProperty(context, cycript, CYJSString("all"), all);
1415
1416     JSObjectRef last(NULL), curr(global);
1417
1418     goto next; for (JSValueRef next;;) {
1419         if (JSValueIsNull(context, next))
1420             break;
1421         last = curr;
1422         curr = CYCastJSObject(context, next);
1423       next:
1424         next = JSObjectGetPrototype(context, curr);
1425     }
1426
1427     JSObjectSetPrototype(context, last, all);
1428
1429     CYSetProperty(context, global, CYJSString("$cyq"), &$cyq);
1430
1431     JSObjectRef System(JSObjectMake(context, NULL, NULL));
1432     CYSetProperty(context, cy, CYJSString("System"), System);
1433
1434     CYSetProperty(context, global, CYJSString("system"), System);
1435     CYSetProperty(context, System, CYJSString("args"), CYJSNull(context));
1436     //CYSetProperty(context, System, CYJSString("global"), global);
1437     CYSetProperty(context, System, CYJSString("print"), &System_print);
1438
1439     if (hooks_ != NULL && hooks_->SetupContext != NULL)
1440         (*hooks_->SetupContext)(context);
1441 }
1442
1443 JSGlobalContextRef CYGetJSContext() {
1444     CYInitializeDynamic();
1445
1446     static JSGlobalContextRef context_;
1447
1448     if (context_ == NULL) {
1449         context_ = JSGlobalContextCreate(Global_);
1450         CYSetupContext(context_);
1451     }
1452
1453     return context_;
1454 }