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 JSStringRef toPointer_s;
 169 JSStringRef toString_s;
 170
 171 static JSStringRef Result_;
 172
 173 void CYFinalize(JSObjectRef object) {
 174     CYData *internal(reinterpret_cast<CYData *>(JSObjectGetPrivate(object)));
 175     if (--internal->count_ == 0)
 176         delete internal;
 177 }
 178
 179 void Structor_(apr_pool_t *pool, sig::Type *&type) {
 180     if (
 181         type->primitive == sig::pointer_P &&
 182         type->data.data.type != NULL &&
 183         type->data.data.type->primitive == sig::struct_P &&
 184         type->data.data.type->name != NULL &&
 185         strcmp(type->data.data.type->name, "_objc_class") == 0
 186     ) {
 187         type->primitive = sig::typename_P;
 188         type->data.data.type = NULL;
 189         return;
 190     }
 191
 192     if (type->primitive != sig::struct_P || type->name == NULL)
 193         return;
 194
 195     size_t length(strlen(type->name));
 196     char keyed[length + 2];
 197     memcpy(keyed + 1, type->name, length + 1);
 198
 199     static const char *modes = "34";
 200     for (size_t i(0); i != 2; ++i) {
 201         char mode(modes[i]);
 202         keyed[0] = mode;
 203
 204         if (CYBridgeEntry *entry = CYBridgeHash(keyed, length + 1))
 205             switch (mode) {
 206                 case '3':
 207                     sig::Parse(pool, &type->data.signature, entry->value_, &Structor_);
 208                 break;
 209
 210                 case '4': {
 211                     sig::Signature signature;
 212                     sig::Parse(pool, &signature, entry->value_, &Structor_);
 213                     type = signature.elements[0].type;
 214                 } break;
 215             }
 216     }
 217 }
 218
 219 JSClassRef Type_privateData::Class_;
 220
 221 struct Context :
 222     CYData
 223 {
 224     JSGlobalContextRef context_;
 225
 226     Context(JSGlobalContextRef context) :
 227         context_(context)
 228     {
 229     }
 230 };
 231
 232 struct Pointer :
 233     CYOwned
 234 {
 235     Type_privateData *type_;
 236     size_t length_;
 237
 238     Pointer(void *value, JSContextRef context, JSObjectRef owner, size_t length, sig::Type *type) :
 239         CYOwned(value, context, owner),
 240         type_(new(pool_) Type_privateData(type)),
 241         length_(length)
 242     {
 243     }
 244 };
 245
 246 struct Struct_privateData :
 247     CYOwned
 248 {
 249     Type_privateData *type_;
 250
 251     Struct_privateData(JSContextRef context, JSObjectRef owner) :
 252         CYOwned(NULL, context, owner)
 253     {
 254     }
 255 };
 256
 257 typedef std::map<const char *, Type_privateData *, CYCStringLess> TypeMap;
 258 static TypeMap Types_;
 259
 260 JSObjectRef CYMakeStruct(JSContextRef context, void *data, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 261     Struct_privateData *internal(new Struct_privateData(context, owner));
 262     apr_pool_t *pool(internal->pool_);
 263     Type_privateData *typical(new(pool) Type_privateData(type, ffi));
 264     internal->type_ = typical;
 265
 266     if (owner != NULL)
 267         internal->value_ = data;
 268     else {
 269         size_t size(typical->GetFFI()->size);
 270         void *copy(apr_palloc(internal->pool_, size));
 271         memcpy(copy, data, size);
 272         internal->value_ = copy;
 273     }
 274
 275     return JSObjectMake(context, Struct_, internal);
 276 }
 277
 278 JSValueRef CYCastJSValue(JSContextRef context, bool value) {
 279     return JSValueMakeBoolean(context, value);
 280 }
 281
 282 JSValueRef CYCastJSValue(JSContextRef context, double value) {
 283     return JSValueMakeNumber(context, value);
 284 }
 285
 286 #define CYCastJSValue_(Type_) \
 287     JSValueRef CYCastJSValue(JSContextRef context, Type_ value) { \
 288         return JSValueMakeNumber(context, static_cast<double>(value)); \
 289     }
 290
 291 CYCastJSValue_(int)
 292 CYCastJSValue_(unsigned int)
 293 CYCastJSValue_(long int)
 294 CYCastJSValue_(long unsigned int)
 295 CYCastJSValue_(long long int)
 296 CYCastJSValue_(long long unsigned int)
 297
 298 JSValueRef CYJSUndefined(JSContextRef context) {
 299     return JSValueMakeUndefined(context);
 300 }
 301
 302 double CYCastDouble(JSContextRef context, JSValueRef value) {
 303     JSValueRef exception(NULL);
 304     double number(JSValueToNumber(context, value, &exception));
 305     CYThrow(context, exception);
 306     return number;
 307 }
 308
 309 bool CYCastBool(JSContextRef context, JSValueRef value) {
 310     return JSValueToBoolean(context, value);
 311 }
 312
 313 JSValueRef CYJSNull(JSContextRef context) {
 314     return JSValueMakeNull(context);
 315 }
 316
 317 JSValueRef CYCastJSValue(JSContextRef context, JSStringRef value) {
 318     return value == NULL ? CYJSNull(context) : JSValueMakeString(context, value);
 319 }
 320
 321 JSValueRef CYCastJSValue(JSContextRef context, const char *value) {
 322     return CYCastJSValue(context, CYJSString(value));
 323 }
 324
 325 JSObjectRef CYCastJSObject(JSContextRef context, JSValueRef value) {
 326     JSValueRef exception(NULL);
 327     JSObjectRef object(JSValueToObject(context, value, &exception));
 328     CYThrow(context, exception);
 329     return object;
 330 }
 331
 332 JSValueRef CYCallAsFunction(JSContextRef context, JSObjectRef function, JSObjectRef _this, size_t count, const JSValueRef arguments[]) {
 333     JSValueRef exception(NULL);
 334     JSValueRef value(JSObjectCallAsFunction(context, function, _this, count, arguments, &exception));
 335     CYThrow(context, exception);
 336     return value;
 337 }
 338
 339 bool CYIsCallable(JSContextRef context, JSValueRef value) {
 340     return value != NULL && JSValueIsObject(context, value) && JSObjectIsFunction(context, (JSObjectRef) value);
 341 }
 342
 343 static JSValueRef System_print(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 344     if (count == 0)
 345         printf("\n");
 346     else {
 347         CYPool pool;
 348         printf("%s\n", CYPoolCString(pool, context, arguments[0]));
 349     }
 350
 351     return CYJSUndefined(context);
 352 } CYCatch }
 353
 354 static size_t Nonce_(0);
 355
 356 static JSValueRef $cyq(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 357     CYPool pool;
 358     const char *name(apr_psprintf(pool, "%s%"APR_SIZE_T_FMT"", CYPoolCString(pool, context, arguments[0]), Nonce_++));
 359     return CYCastJSValue(context, name);
 360 }
 361
 362 static JSValueRef Cycript_gc_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 363     JSGarbageCollect(context);
 364     return CYJSUndefined(context);
 365 }
 366
 367 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSValueRef value, JSValueRef *exception) { CYTry {
 368     switch (JSType type = JSValueGetType(context, value)) {
 369         case kJSTypeUndefined:
 370             return "undefined";
 371         case kJSTypeNull:
 372             return "null";
 373         case kJSTypeBoolean:
 374             return CYCastBool(context, value) ? "true" : "false";
 375
 376         case kJSTypeNumber: {
 377             std::ostringstream str;
 378             CYNumerify(str, CYCastDouble(context, value));
 379             std::string value(str.str());
 380             return apr_pstrmemdup(pool, value.c_str(), value.size());
 381         } break;
 382
 383         case kJSTypeString: {
 384             std::ostringstream str;
 385             CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, value)));
 386             CYStringify(str, string.data, string.size);
 387             std::string value(str.str());
 388             return apr_pstrmemdup(pool, value.c_str(), value.size());
 389         } break;
 390
 391         case kJSTypeObject:
 392             return CYPoolCCYON(pool, context, (JSObjectRef) value);
 393         default:
 394             throw CYJSError(context, "JSValueGetType() == 0x%x", type);
 395     }
 396 } CYCatch }
 397
 398 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSValueRef value) {
 399     JSValueRef exception(NULL);
 400     const char *cyon(CYPoolCCYON(pool, context, value, &exception));
 401     CYThrow(context, exception);
 402     return cyon;
 403 }
 404
 405 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSObjectRef object) {
 406     JSValueRef toCYON(CYGetProperty(context, object, toCYON_s));
 407     if (CYIsCallable(context, toCYON)) {
 408         JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toCYON, object, 0, NULL));
 409         _assert(value != NULL);
 410         return CYPoolCString(pool, context, value);
 411     }
 412
 413     JSValueRef toJSON(CYGetProperty(context, object, toJSON_s));
 414     if (CYIsCallable(context, toJSON)) {
 415         JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 416         JSValueRef exception(NULL);
 417         const char *cyon(CYPoolCCYON(pool, context, CYCallAsFunction(context, (JSObjectRef) toJSON, object, 1, arguments), &exception));
 418         CYThrow(context, exception);
 419         return cyon;
 420     }
 421
 422     std::ostringstream str;
 423
 424     str << '{';
 425
 426     // XXX: this is, sadly, going to leak
 427     JSPropertyNameArrayRef names(JSObjectCopyPropertyNames(context, object));
 428
 429     bool comma(false);
 430
 431     for (size_t index(0), count(JSPropertyNameArrayGetCount(names)); index != count; ++index) {
 432         JSStringRef name(JSPropertyNameArrayGetNameAtIndex(names, index));
 433         JSValueRef value(CYGetProperty(context, object, name));
 434
 435         if (comma)
 436             str << ',';
 437         else
 438             comma = true;
 439
 440         CYUTF8String string(CYPoolUTF8String(pool, context, name));
 441         if (CYIsKey(string))
 442             str << string.data;
 443         else
 444             CYStringify(str, string.data, string.size);
 445
 446         str << ':' << CYPoolCCYON(pool, context, value);
 447     }
 448
 449     str << '}';
 450
 451     JSPropertyNameArrayRelease(names);
 452
 453     std::string string(str.str());
 454     return apr_pstrmemdup(pool, string.c_str(), string.size());
 455 }
 456
 457 static JSValueRef Array_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 458     CYPool pool;
 459     std::ostringstream str;
 460
 461     str << '[';
 462
 463     JSValueRef length(CYGetProperty(context, _this, length_s));
 464     bool comma(false);
 465
 466     for (size_t index(0), count(CYCastDouble(context, length)); index != count; ++index) {
 467         JSValueRef value(CYGetProperty(context, _this, index));
 468
 469         if (comma)
 470             str << ',';
 471         else
 472             comma = true;
 473
 474         if (!JSValueIsUndefined(context, value))
 475             str << CYPoolCCYON(pool, context, value);
 476         else {
 477             str << ',';
 478             comma = false;
 479         }
 480     }
 481
 482     str << ']';
 483
 484     std::string value(str.str());
 485     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 486 } CYCatch }
 487
 488 static JSValueRef String_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 489     CYPool pool;
 490     std::ostringstream str;
 491
 492     CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, _this)));
 493     CYStringify(str, string.data, string.size);
 494
 495     std::string value(str.str());
 496     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 497 } CYCatch }
 498
 499 JSObjectRef CYMakePointer(JSContextRef context, void *pointer, size_t length, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 500     Pointer *internal(new Pointer(pointer, context, owner, length, type));
 501     return JSObjectMake(context, Pointer_, internal);
 502 }
 503
 504 static JSObjectRef CYMakeFunctor(JSContextRef context, void (*function)(), const char *type, void **cache = NULL) {
 505     cy::Functor *internal;
 506
 507     if (cache != NULL && *cache != NULL) {
 508         internal = reinterpret_cast<cy::Functor *>(*cache);
 509         ++internal->count_;
 510     } else {
 511         internal = new cy::Functor(type, function);
 512
 513         if (cache != NULL) {
 514             *cache = internal;
 515             ++internal->count_;
 516         }
 517     }
 518
 519     return JSObjectMake(context, Functor_, internal);
 520 }
 521
 522 static bool CYGetOffset(apr_pool_t *pool, JSContextRef context, JSStringRef value, ssize_t &index) {
 523     return CYGetOffset(CYPoolCString(pool, context, value), index);
 524 }
 525
 526 void *CYCastPointer_(JSContextRef context, JSValueRef value) {
 527     switch (JSValueGetType(context, value)) {
 528         case kJSTypeNull:
 529             return NULL;
 530         case kJSTypeObject: {
 531             JSObjectRef object((JSObjectRef) value);
 532             if (JSValueIsObjectOfClass(context, value, Pointer_)) {
 533                 Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 534                 return internal->value_;
 535             }
 536             JSValueRef toPointer(CYGetProperty(context, object, toPointer_s));
 537             if (CYIsCallable(context, toPointer)) {
 538                 JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toPointer, object, 0, NULL));
 539                 _assert(value != NULL);
 540                 return CYCastPointer_(context, value);
 541             }
 542         } default:
 543             double number(CYCastDouble(context, value));
 544             if (std::isnan(number))
 545                 throw CYJSError(context, "cannot convert value to pointer");
 546             return reinterpret_cast<void *>(static_cast<uintptr_t>(static_cast<long long>(number)));
 547     }
 548 }
 549
 550 void CYPoolFFI(apr_pool_t *pool, JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, JSValueRef value) {
 551     switch (type->primitive) {
 552         case sig::boolean_P:
 553             *reinterpret_cast<bool *>(data) = JSValueToBoolean(context, value);
 554         break;
 555
 556 #define CYPoolFFI_(primitive, native) \
 557         case sig::primitive ## _P: \
 558             *reinterpret_cast<native *>(data) = CYCastDouble(context, value); \
 559         break;
 560
 561         CYPoolFFI_(uchar, unsigned char)
 562         CYPoolFFI_(char, char)
 563         CYPoolFFI_(ushort, unsigned short)
 564         CYPoolFFI_(short, short)
 565         CYPoolFFI_(ulong, unsigned long)
 566         CYPoolFFI_(long, long)
 567         CYPoolFFI_(uint, unsigned int)
 568         CYPoolFFI_(int, int)
 569         CYPoolFFI_(ulonglong, unsigned long long)
 570         CYPoolFFI_(longlong, long long)
 571         CYPoolFFI_(float, float)
 572         CYPoolFFI_(double, double)
 573
 574         case sig::array_P: {
 575             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 576             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 577             for (size_t index(0); index != type->data.data.size; ++index) {
 578                 ffi_type *field(ffi->elements[index]);
 579
 580                 JSValueRef rhs;
 581                 if (aggregate == NULL)
 582                     rhs = value;
 583                 else {
 584                     rhs = CYGetProperty(context, aggregate, index);
 585                     if (JSValueIsUndefined(context, rhs))
 586                         throw CYJSError(context, "unable to extract array value");
 587                 }
 588
 589                 CYPoolFFI(pool, context, type->data.data.type, field, base, rhs);
 590                 // XXX: alignment?
 591                 base += field->size;
 592             }
 593         } break;
 594
 595         case sig::pointer_P:
 596             *reinterpret_cast<void **>(data) = CYCastPointer<void *>(context, value);
 597         break;
 598
 599         case sig::string_P:
 600             *reinterpret_cast<const char **>(data) = CYPoolCString(pool, context, value);
 601         break;
 602
 603         case sig::struct_P: {
 604             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 605             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 606             for (size_t index(0); index != type->data.signature.count; ++index) {
 607                 sig::Element *element(&type->data.signature.elements[index]);
 608                 ffi_type *field(ffi->elements[index]);
 609
 610                 JSValueRef rhs;
 611                 if (aggregate == NULL)
 612                     rhs = value;
 613                 else {
 614                     rhs = CYGetProperty(context, aggregate, index);
 615                     if (JSValueIsUndefined(context, rhs)) {
 616                         if (element->name != NULL)
 617                             rhs = CYGetProperty(context, aggregate, CYJSString(element->name));
 618                         else
 619                             goto undefined;
 620                         if (JSValueIsUndefined(context, rhs)) undefined:
 621                             throw CYJSError(context, "unable to extract structure value");
 622                     }
 623                 }
 624
 625                 CYPoolFFI(pool, context, element->type, field, base, rhs);
 626                 // XXX: alignment?
 627                 base += field->size;
 628             }
 629         } break;
 630
 631         case sig::void_P:
 632         break;
 633
 634         default:
 635             if (hooks_ != NULL && hooks_->PoolFFI != NULL)
 636                 if ((*hooks_->PoolFFI)(pool, context, type, ffi, data, value))
 637                     return;
 638
 639             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 640     }
 641 }
 642
 643 JSValueRef CYFromFFI(JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, bool initialize, JSObjectRef owner) {
 644     switch (type->primitive) {
 645         case sig::boolean_P:
 646             return CYCastJSValue(context, *reinterpret_cast<bool *>(data));
 647
 648 #define CYFromFFI_(primitive, native) \
 649         case sig::primitive ## _P: \
 650             return CYCastJSValue(context, *reinterpret_cast<native *>(data)); \
 651
 652         CYFromFFI_(uchar, unsigned char)
 653         CYFromFFI_(char, char)
 654         CYFromFFI_(ushort, unsigned short)
 655         CYFromFFI_(short, short)
 656         CYFromFFI_(ulong, unsigned long)
 657         CYFromFFI_(long, long)
 658         CYFromFFI_(uint, unsigned int)
 659         CYFromFFI_(int, int)
 660         CYFromFFI_(ulonglong, unsigned long long)
 661         CYFromFFI_(longlong, long long)
 662         CYFromFFI_(float, float)
 663         CYFromFFI_(double, double)
 664
 665         case sig::array_P:
 666             if (void *pointer = data)
 667                 return CYMakePointer(context, pointer, type->data.data.size, type->data.data.type, NULL, owner);
 668             else goto null;
 669
 670         case sig::pointer_P:
 671             if (void *pointer = *reinterpret_cast<void **>(data))
 672                 return CYMakePointer(context, pointer, _not(size_t), type->data.data.type, NULL, owner);
 673             else goto null;
 674
 675         case sig::string_P:
 676             if (char *utf8 = *reinterpret_cast<char **>(data))
 677                 return CYCastJSValue(context, utf8);
 678             else goto null;
 679
 680         case sig::struct_P:
 681             return CYMakeStruct(context, data, type, ffi, owner);
 682         case sig::void_P:
 683             return CYJSUndefined(context);
 684
 685         null:
 686             return CYJSNull(context);
 687         default:
 688             if (hooks_ != NULL && hooks_->FromFFI != NULL)
 689                 if (JSValueRef value = (*hooks_->FromFFI)(context, type, ffi, data, initialize, owner))
 690                     return value;
 691
 692             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 693     }
 694 }
 695
 696 static void FunctionClosure_(ffi_cif *cif, void *result, void **arguments, void *arg) {
 697     Closure_privateData *internal(reinterpret_cast<Closure_privateData *>(arg));
 698
 699     JSContextRef context(internal->context_);
 700
 701     size_t count(internal->cif_.nargs);
 702     JSValueRef values[count];
 703
 704     for (size_t index(0); index != count; ++index)
 705         values[index] = CYFromFFI(context, internal->signature_.elements[1 + index].type, internal->cif_.arg_types[index], arguments[index]);
 706
 707     JSValueRef value(CYCallAsFunction(context, internal->function_, NULL, count, values));
 708     CYPoolFFI(NULL, context, internal->signature_.elements[0].type, internal->cif_.rtype, result, value);
 709 }
 710
 711 Closure_privateData *CYMakeFunctor_(JSContextRef context, JSObjectRef function, const char *type, void (*callback)(ffi_cif *, void *, void **, void *)) {
 712     // XXX: in case of exceptions this will leak
 713     // XXX: in point of fact, this may /need/ to leak :(
 714     Closure_privateData *internal(new Closure_privateData(context, function, type));
 715
 716     ffi_closure *closure((ffi_closure *) _syscall(mmap(
 717         NULL, sizeof(ffi_closure),
 718         PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE,
 719         -1, 0
 720     )));
 721
 722     ffi_status status(ffi_prep_closure(closure, &internal->cif_, callback, internal));
 723     _assert(status == FFI_OK);
 724
 725     _syscall(mprotect(closure, sizeof(*closure), PROT_READ | PROT_EXEC));
 726
 727     internal->value_ = closure;
 728
 729     return internal;
 730 }
 731
 732 static JSObjectRef CYMakeFunctor(JSContextRef context, JSObjectRef function, const char *type) {
 733     Closure_privateData *internal(CYMakeFunctor_(context, function, type, &FunctionClosure_));
 734     JSObjectRef object(JSObjectMake(context, Functor_, internal));
 735     // XXX: see above notes about needing to leak
 736     JSValueProtect(CYGetJSContext(context), object);
 737     return object;
 738 }
 739
 740 JSObjectRef CYGetCachedObject(JSContextRef context, JSStringRef name) {
 741     return CYCastJSObject(context, CYGetProperty(context, CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s)), name));
 742 }
 743
 744 static JSObjectRef CYMakeFunctor(JSContextRef context, JSValueRef value, const char *type) {
 745     JSObjectRef Function(CYGetCachedObject(context, CYJSString("Function")));
 746
 747     JSValueRef exception(NULL);
 748     bool function(JSValueIsInstanceOfConstructor(context, value, Function, &exception));
 749     CYThrow(context, exception);
 750
 751     if (function) {
 752         JSObjectRef function(CYCastJSObject(context, value));
 753         return CYMakeFunctor(context, function, type);
 754     } else {
 755         void (*function)()(CYCastPointer<void (*)()>(context, value));
 756         return CYMakeFunctor(context, function, type);
 757     }
 758 }
 759
 760 static bool Index_(apr_pool_t *pool, JSContextRef context, Struct_privateData *internal, JSStringRef property, ssize_t &index, uint8_t *&base) {
 761     Type_privateData *typical(internal->type_);
 762     sig::Type *type(typical->type_);
 763     if (type == NULL)
 764         return false;
 765
 766     const char *name(CYPoolCString(pool, context, property));
 767     size_t length(strlen(name));
 768     double number(CYCastDouble(name, length));
 769
 770     size_t count(type->data.signature.count);
 771
 772     if (std::isnan(number)) {
 773         if (property == NULL)
 774             return false;
 775
 776         sig::Element *elements(type->data.signature.elements);
 777
 778         for (size_t local(0); local != count; ++local) {
 779             sig::Element *element(&elements[local]);
 780             if (element->name != NULL && strcmp(name, element->name) == 0) {
 781                 index = local;
 782                 goto base;
 783             }
 784         }
 785
 786         return false;
 787     } else {
 788         index = static_cast<ssize_t>(number);
 789         if (index != number || index < 0 || static_cast<size_t>(index) >= count)
 790             return false;
 791     }
 792
 793   base:
 794     ffi_type **elements(typical->GetFFI()->elements);
 795
 796     base = reinterpret_cast<uint8_t *>(internal->value_);
 797     for (ssize_t local(0); local != index; ++local)
 798         base += elements[local]->size;
 799
 800     return true;
 801 }
 802
 803 static JSValueRef Pointer_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 804     CYPool pool;
 805     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 806
 807     if (JSStringIsEqual(property, length_s))
 808         return internal->length_ == _not(size_t) ? CYJSUndefined(context) : CYCastJSValue(context, internal->length_);
 809
 810     Type_privateData *typical(internal->type_);
 811
 812     if (typical->type_ == NULL)
 813         return NULL;
 814
 815     ssize_t offset;
 816     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 817         offset = 0;
 818     else if (!CYGetOffset(pool, context, property, offset))
 819         return NULL;
 820
 821     ffi_type *ffi(typical->GetFFI());
 822
 823     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 824     base += ffi->size * offset;
 825
 826     JSObjectRef owner(internal->GetOwner() ?: object);
 827     return CYFromFFI(context, typical->type_, ffi, base, false, owner);
 828 } CYCatch }
 829
 830 static bool Pointer_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 831     CYPool pool;
 832     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 833     Type_privateData *typical(internal->type_);
 834
 835     if (typical->type_ == NULL)
 836         return NULL;
 837
 838     ssize_t offset;
 839     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 840         offset = 0;
 841     else if (!CYGetOffset(pool, context, property, offset))
 842         return NULL;
 843
 844     ffi_type *ffi(typical->GetFFI());
 845
 846     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 847     base += ffi->size * offset;
 848
 849     CYPoolFFI(NULL, context, typical->type_, ffi, base, value);
 850     return true;
 851 } CYCatch }
 852
 853 static JSValueRef Struct_callAsFunction_$cya(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 854     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(_this)));
 855     Type_privateData *typical(internal->type_);
 856     return CYMakePointer(context, internal->value_, _not(size_t), typical->type_, typical->ffi_, _this);
 857 }
 858
 859 static JSValueRef Struct_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 860     CYPool pool;
 861     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 862     Type_privateData *typical(internal->type_);
 863
 864     ssize_t index;
 865     uint8_t *base;
 866
 867     if (!Index_(pool, context, internal, property, index, base))
 868         return NULL;
 869
 870     JSObjectRef owner(internal->GetOwner() ?: object);
 871
 872     return CYFromFFI(context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, false, owner);
 873 } CYCatch }
 874
 875 static bool Struct_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 876     CYPool pool;
 877     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 878     Type_privateData *typical(internal->type_);
 879
 880     ssize_t index;
 881     uint8_t *base;
 882
 883     if (!Index_(pool, context, internal, property, index, base))
 884         return false;
 885
 886     CYPoolFFI(NULL, context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, value);
 887     return true;
 888 } CYCatch }
 889
 890 static void Struct_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
 891     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 892     Type_privateData *typical(internal->type_);
 893     sig::Type *type(typical->type_);
 894
 895     if (type == NULL)
 896         return;
 897
 898     size_t count(type->data.signature.count);
 899     sig::Element *elements(type->data.signature.elements);
 900
 901     char number[32];
 902
 903     for (size_t index(0); index != count; ++index) {
 904         const char *name;
 905         name = elements[index].name;
 906
 907         if (name == NULL) {
 908             sprintf(number, "%zu", index);
 909             name = number;
 910         }
 911
 912         JSPropertyNameAccumulatorAddName(names, CYJSString(name));
 913     }
 914 }
 915
 916 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 {
 917     if (setups + count != signature->count - 1)
 918         throw CYJSError(context, "incorrect number of arguments to ffi function");
 919
 920     size_t size(setups + count);
 921     void *values[size];
 922     memcpy(values, setup, sizeof(void *) * setups);
 923
 924     for (size_t index(setups); index != size; ++index) {
 925         sig::Element *element(&signature->elements[index + 1]);
 926         ffi_type *ffi(cif->arg_types[index]);
 927         // XXX: alignment?
 928         values[index] = new(pool) uint8_t[ffi->size];
 929         CYPoolFFI(pool, context, element->type, ffi, values[index], arguments[index - setups]);
 930     }
 931
 932     uint8_t value[cif->rtype->size];
 933
 934     if (hooks_ != NULL && hooks_->CallFunction != NULL)
 935         (*hooks_->CallFunction)(context, cif, function, value, values);
 936     else
 937         ffi_call(cif, function, value, values);
 938
 939     return CYFromFFI(context, signature->elements[0].type, cif->rtype, value, initialize);
 940 } CYCatch }
 941
 942 static JSValueRef Functor_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 943     CYPool pool;
 944     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
 945     return CYCallFunction(pool, context, 0, NULL, count, arguments, false, exception, &internal->signature_, &internal->cif_, internal->GetValue());
 946 }
 947
 948 static JSObjectRef CYMakeType(JSContextRef context, const char *type) {
 949     Type_privateData *internal(new Type_privateData(type));
 950     return JSObjectMake(context, Type_privateData::Class_, internal);
 951 }
 952
 953 static JSObjectRef CYMakeType(JSContextRef context, sig::Type *type) {
 954     Type_privateData *internal(new Type_privateData(type));
 955     return JSObjectMake(context, Type_privateData::Class_, internal);
 956 }
 957
 958 static void *CYCastSymbol(const char *name) {
 959     return dlsym(RTLD_DEFAULT, name);
 960 }
 961
 962 static JSValueRef All_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 963     JSObjectRef global(CYGetGlobalObject(context));
 964     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
 965     if (JSValueRef value = CYGetProperty(context, cycript, property))
 966         if (!JSValueIsUndefined(context, value))
 967             return value;
 968
 969     CYPool pool;
 970     CYUTF8String name(CYPoolUTF8String(pool, context, property));
 971
 972     if (hooks_ != NULL && hooks_->RuntimeProperty != NULL)
 973         if (JSValueRef value = (*hooks_->RuntimeProperty)(context, name))
 974             return value;
 975
 976     size_t length(name.size);
 977     char keyed[length + 2];
 978     memcpy(keyed + 1, name.data, length + 1);
 979
 980     static const char *modes = "0124";
 981     for (size_t i(0); i != 4; ++i) {
 982         char mode(modes[i]);
 983         keyed[0] = mode;
 984
 985         if (CYBridgeEntry *entry = CYBridgeHash(keyed, length + 1))
 986             switch (mode) {
 987                 case '0':
 988                     return JSEvaluateScript(CYGetJSContext(context), CYJSString(entry->value_), NULL, NULL, 0, NULL);
 989
 990                 case '1':
 991                     if (void (*symbol)() = reinterpret_cast<void (*)()>(CYCastSymbol(name.data)))
 992                         return CYMakeFunctor(context, symbol, entry->value_, &entry->cache_);
 993                     else return NULL;
 994
 995                 case '2':
 996                     if (void *symbol = CYCastSymbol(name.data)) {
 997                         // XXX: this is horrendously inefficient
 998                         sig::Signature signature;
 999                         sig::Parse(pool, &signature, entry->value_, &Structor_);
1000                         ffi_cif cif;
1001                         sig::sig_ffi_cif(pool, &sig::ObjectiveC, &signature, &cif);
1002                         return CYFromFFI(context, signature.elements[0].type, cif.rtype, symbol);
1003                     } else return NULL;
1004
1005                 // XXX: implement case 3
1006                 case '4':
1007                     return CYMakeType(context, entry->value_);
1008             }
1009     }
1010
1011     return NULL;
1012 } CYCatch }
1013
1014 static JSObjectRef Pointer_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1015     if (count != 2)
1016         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1017
1018     CYPool pool;
1019
1020     void *value(CYCastPointer<void *>(context, arguments[0]));
1021     const char *type(CYPoolCString(pool, context, arguments[1]));
1022
1023     sig::Signature signature;
1024     sig::Parse(pool, &signature, type, &Structor_);
1025
1026     return CYMakePointer(context, value, _not(size_t), signature.elements[0].type, NULL, NULL);
1027 } CYCatch }
1028
1029 static JSObjectRef Type_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1030     if (count != 1)
1031         throw CYJSError(context, "incorrect number of arguments to Type constructor");
1032     CYPool pool;
1033     const char *type(CYPoolCString(pool, context, arguments[0]));
1034     return CYMakeType(context, type);
1035 } CYCatch }
1036
1037 static JSValueRef Type_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1038     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1039
1040     sig::Type type;
1041
1042     if (JSStringIsEqualToUTF8CString(property, "$cyi")) {
1043         type.primitive = sig::pointer_P;
1044         type.data.data.size = 0;
1045     } else {
1046         CYPool pool;
1047         size_t index(CYGetIndex(pool, context, property));
1048         if (index == _not(size_t))
1049             return NULL;
1050         type.primitive = sig::array_P;
1051         type.data.data.size = index;
1052     }
1053
1054     type.name = NULL;
1055     type.flags = 0;
1056
1057     type.data.data.type = internal->type_;
1058
1059     return CYMakeType(context, &type);
1060 } CYCatch }
1061
1062 static JSValueRef Type_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1063     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1064
1065     if (count != 1)
1066         throw CYJSError(context, "incorrect number of arguments to type cast function");
1067     sig::Type *type(internal->type_);
1068     ffi_type *ffi(internal->GetFFI());
1069     // XXX: alignment?
1070     uint8_t value[ffi->size];
1071     CYPool pool;
1072     CYPoolFFI(pool, context, type, ffi, value, arguments[0]);
1073     return CYFromFFI(context, type, ffi, value);
1074 } CYCatch }
1075
1076 static JSObjectRef Type_callAsConstructor(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1077     if (count != 0)
1078         throw CYJSError(context, "incorrect number of arguments to type cast function");
1079     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1080
1081     sig::Type *type(internal->type_);
1082     size_t length;
1083
1084     if (type->primitive != sig::array_P)
1085         length = _not(size_t);
1086     else {
1087         length = type->data.data.size;
1088         type = type->data.data.type;
1089     }
1090
1091     void *value(malloc(internal->GetFFI()->size));
1092     return CYMakePointer(context, value, length, type, NULL, NULL);
1093 } CYCatch }
1094
1095 static JSObjectRef Functor_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1096     if (count != 2)
1097         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1098     CYPool pool;
1099     const char *type(CYPoolCString(pool, context, arguments[1]));
1100     return CYMakeFunctor(context, arguments[0], type);
1101 } CYCatch }
1102
1103 static JSValueRef CYValue_callAsFunction_valueOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1104     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1105     return CYCastJSValue(context, reinterpret_cast<uintptr_t>(internal->value_));
1106 } CYCatch }
1107
1108 static JSValueRef CYValue_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1109     return CYValue_callAsFunction_valueOf(context, object, _this, count, arguments, exception);
1110 }
1111
1112 static JSValueRef CYValue_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1113     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1114     char string[32];
1115     sprintf(string, "%p", internal->value_);
1116     return CYCastJSValue(context, string);
1117 } CYCatch }
1118
1119 static JSValueRef Pointer_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1120     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(_this)));
1121     if (internal->length_ != _not(size_t)) {
1122         JSObjectRef Array(CYGetCachedObject(context, Array_s));
1123         JSObjectRef toCYON(CYCastJSObject(context, CYGetProperty(context, Array, toCYON_s)));
1124         return CYCallAsFunction(context, toCYON, _this, count, arguments);
1125     } else {
1126         char string[32];
1127         sprintf(string, "%p", internal->value_);
1128         return CYCastJSValue(context, string);
1129     }
1130 } CYCatch }
1131
1132 static JSValueRef Type_callAsFunction_toString(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1133     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1134     CYPool pool;
1135     const char *type(sig::Unparse(pool, internal->type_));
1136     return CYCastJSValue(context, CYJSString(type));
1137 } CYCatch }
1138
1139 static JSValueRef Type_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1140     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1141     CYPool pool;
1142     const char *type(sig::Unparse(pool, internal->type_));
1143     size_t size(strlen(type));
1144     char *cyon(new(pool) char[12 + size + 1]);
1145     memcpy(cyon, "new Type(\"", 10);
1146     cyon[12 + size] = '\0';
1147     cyon[12 + size - 2] = '"';
1148     cyon[12 + size - 1] = ')';
1149     memcpy(cyon + 10, type, size);
1150     return CYCastJSValue(context, CYJSString(cyon));
1151 } CYCatch }
1152
1153 static JSValueRef Type_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1154     return Type_callAsFunction_toString(context, object, _this, count, arguments, exception);
1155 }
1156
1157 static JSStaticFunction Pointer_staticFunctions[4] = {
1158     {"toCYON", &Pointer_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1159     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1160     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1161     {NULL, NULL, 0}
1162 };
1163
1164 static JSStaticFunction Struct_staticFunctions[2] = {
1165     {"$cya", &Struct_callAsFunction_$cya, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1166     {NULL, NULL, 0}
1167 };
1168
1169 static JSStaticFunction Functor_staticFunctions[4] = {
1170     {"toCYON", &CYValue_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1171     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1172     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1173     {NULL, NULL, 0}
1174 };
1175
1176 namespace cy {
1177     JSStaticFunction const * const Functor::StaticFunctions = Functor_staticFunctions;
1178 }
1179
1180 static JSStaticFunction Type_staticFunctions[4] = {
1181     {"toCYON", &Type_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1182     {"toJSON", &Type_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1183     {"toString", &Type_callAsFunction_toString, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1184     {NULL, NULL, 0}
1185 };
1186
1187 static JSObjectRef (*JSObjectMakeArray$)(JSContextRef, size_t, const JSValueRef[], JSValueRef *);
1188
1189 void CYSetArgs(int argc, const char *argv[]) {
1190     JSContextRef context(CYGetJSContext());
1191     JSValueRef args[argc];
1192     for (int i(0); i != argc; ++i)
1193         args[i] = CYCastJSValue(context, argv[i]);
1194
1195     JSObjectRef array;
1196     if (JSObjectMakeArray$ != NULL) {
1197         JSValueRef exception(NULL);
1198         array = (*JSObjectMakeArray$)(context, argc, args, &exception);
1199         CYThrow(context, exception);
1200     } else {
1201         JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array")));
1202         JSValueRef value(CYCallAsFunction(context, Array, NULL, argc, args));
1203         array = CYCastJSObject(context, value);
1204     }
1205
1206     JSObjectRef System(CYGetCachedObject(context, CYJSString("System")));
1207     CYSetProperty(context, System, CYJSString("args"), array);
1208 }
1209
1210 JSObjectRef CYGetGlobalObject(JSContextRef context) {
1211     return JSContextGetGlobalObject(context);
1212 }
1213
1214 const char *CYExecute(apr_pool_t *pool, CYUTF8String code) {
1215     JSContextRef context(CYGetJSContext());
1216     JSValueRef exception(NULL), result;
1217
1218     void *handle;
1219     if (hooks_ != NULL && hooks_->ExecuteStart != NULL)
1220         handle = (*hooks_->ExecuteStart)(context);
1221     else
1222         handle = NULL;
1223
1224     const char *json;
1225
1226     try {
1227         result = JSEvaluateScript(context, CYJSString(code), NULL, NULL, 0, &exception);
1228     } catch (const char *error) {
1229         return error;
1230     }
1231
1232     if (exception != NULL) { error:
1233         result = exception;
1234         exception = NULL;
1235     }
1236
1237     if (JSValueIsUndefined(context, result))
1238         return NULL;
1239
1240     try {
1241         json = CYPoolCCYON(pool, context, result, &exception);
1242     } catch (const char *error) {
1243         return error;
1244     }
1245
1246     if (exception != NULL)
1247         goto error;
1248
1249     CYSetProperty(context, CYGetGlobalObject(context), Result_, result);
1250
1251     if (hooks_ != NULL && hooks_->ExecuteEnd != NULL)
1252         (*hooks_->ExecuteEnd)(context, handle);
1253     return json;
1254 }
1255
1256 extern "C" void CydgetSetupContext(JSGlobalContextRef context) {
1257     CYSetupContext(context);
1258 }
1259
1260 static bool initialized_ = false;
1261
1262 void CYInitializeDynamic() {
1263     if (!initialized_)
1264         initialized_ = true;
1265     else return;
1266
1267     CYInitializeStatic();
1268
1269     JSObjectMakeArray$ = reinterpret_cast<JSObjectRef (*)(JSContextRef, size_t, const JSValueRef[], JSValueRef *)>(dlsym(RTLD_DEFAULT, "JSObjectMakeArray"));
1270
1271     JSClassDefinition definition;
1272
1273     definition = kJSClassDefinitionEmpty;
1274     definition.className = "All";
1275     definition.getProperty = &All_getProperty;
1276     All_ = JSClassCreate(&definition);
1277
1278     definition = kJSClassDefinitionEmpty;
1279     definition.className = "Context";
1280     definition.finalize = &CYFinalize;
1281     Context_ = JSClassCreate(&definition);
1282
1283     definition = kJSClassDefinitionEmpty;
1284     definition.className = "Functor";
1285     definition.staticFunctions = cy::Functor::StaticFunctions;
1286     definition.callAsFunction = &Functor_callAsFunction;
1287     definition.finalize = &CYFinalize;
1288     Functor_ = JSClassCreate(&definition);
1289
1290     definition = kJSClassDefinitionEmpty;
1291     definition.className = "Pointer";
1292     definition.staticFunctions = Pointer_staticFunctions;
1293     definition.getProperty = &Pointer_getProperty;
1294     definition.setProperty = &Pointer_setProperty;
1295     definition.finalize = &CYFinalize;
1296     Pointer_ = JSClassCreate(&definition);
1297
1298     definition = kJSClassDefinitionEmpty;
1299     definition.className = "Struct";
1300     definition.staticFunctions = Struct_staticFunctions;
1301     definition.getProperty = &Struct_getProperty;
1302     definition.setProperty = &Struct_setProperty;
1303     definition.getPropertyNames = &Struct_getPropertyNames;
1304     definition.finalize = &CYFinalize;
1305     Struct_ = JSClassCreate(&definition);
1306
1307     definition = kJSClassDefinitionEmpty;
1308     definition.className = "Type";
1309     definition.staticFunctions = Type_staticFunctions;
1310     definition.getProperty = &Type_getProperty;
1311     definition.callAsFunction = &Type_callAsFunction;
1312     definition.callAsConstructor = &Type_callAsConstructor;
1313     definition.finalize = &CYFinalize;
1314     Type_privateData::Class_ = JSClassCreate(&definition);
1315
1316     definition = kJSClassDefinitionEmpty;
1317     definition.className = "Global";
1318     //definition.getProperty = &Global_getProperty;
1319     Global_ = JSClassCreate(&definition);
1320
1321     Array_s = JSStringCreateWithUTF8CString("Array");
1322     cy_s = JSStringCreateWithUTF8CString("$cy");
1323     length_s = JSStringCreateWithUTF8CString("length");
1324     message_s = JSStringCreateWithUTF8CString("message");
1325     name_s = JSStringCreateWithUTF8CString("name");
1326     pop_s = JSStringCreateWithUTF8CString("pop");
1327     prototype_s = JSStringCreateWithUTF8CString("prototype");
1328     push_s = JSStringCreateWithUTF8CString("push");
1329     splice_s = JSStringCreateWithUTF8CString("splice");
1330     toCYON_s = JSStringCreateWithUTF8CString("toCYON");
1331     toJSON_s = JSStringCreateWithUTF8CString("toJSON");
1332     toPointer_s = JSStringCreateWithUTF8CString("toPointer");
1333     toString_s = JSStringCreateWithUTF8CString("toString");
1334
1335     Result_ = JSStringCreateWithUTF8CString("_");
1336
1337     if (hooks_ != NULL && hooks_->Initialize != NULL)
1338         (*hooks_->Initialize)();
1339 }
1340
1341 void CYThrow(JSContextRef context, JSValueRef value) {
1342     if (value != NULL)
1343         throw CYJSError(context, value);
1344 }
1345
1346 const char *CYJSError::PoolCString(apr_pool_t *pool) const {
1347     // XXX: this used to be CYPoolCString
1348     return CYPoolCCYON(pool, context_, value_);
1349 }
1350
1351 JSValueRef CYJSError::CastJSValue(JSContextRef context) const {
1352     // XXX: what if the context is different?
1353     return value_;
1354 }
1355
1356 JSValueRef CYCastJSError(JSContextRef context, const char *message) {
1357     JSObjectRef Error(CYGetCachedObject(context, CYJSString("Error")));
1358
1359     JSValueRef arguments[1] = {CYCastJSValue(context, message)};
1360
1361     JSValueRef exception(NULL);
1362     JSValueRef value(JSObjectCallAsConstructor(context, Error, 1, arguments, &exception));
1363     CYThrow(context, exception);
1364
1365     return value;
1366 }
1367
1368 JSValueRef CYPoolError::CastJSValue(JSContextRef context) const {
1369     return CYCastJSError(context, message_);
1370 }
1371
1372 CYJSError::CYJSError(JSContextRef context, const char *format, ...) {
1373     _assert(context != NULL);
1374
1375     CYPool pool;
1376
1377     va_list args;
1378     va_start(args, format);
1379     const char *message(apr_pvsprintf(pool, format, args));
1380     va_end(args);
1381
1382     value_ = CYCastJSError(context, message);
1383 }
1384
1385 JSGlobalContextRef CYGetJSContext(JSContextRef context) {
1386     return reinterpret_cast<Context *>(JSObjectGetPrivate(CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s))))->context_;
1387 }
1388
1389 extern "C" void CYSetupContext(JSGlobalContextRef context) {
1390     CYInitializeDynamic();
1391
1392     JSObjectRef global(CYGetGlobalObject(context));
1393
1394     JSObjectRef cy(JSObjectMake(context, Context_, new Context(context)));
1395     CYSetProperty(context, global, cy_s, cy, kJSPropertyAttributeDontEnum);
1396
1397 /* Cache Globals {{{ */
1398     JSObjectRef Array(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Array"))));
1399     CYSetProperty(context, cy, CYJSString("Array"), Array);
1400
1401     JSObjectRef Array_prototype(CYCastJSObject(context, CYGetProperty(context, Array, prototype_s)));
1402     CYSetProperty(context, cy, CYJSString("Array_prototype"), Array_prototype);
1403
1404     JSObjectRef Error(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Error"))));
1405     CYSetProperty(context, cy, CYJSString("Error"), Error);
1406
1407     JSObjectRef Function(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Function"))));
1408     CYSetProperty(context, cy, CYJSString("Function"), Function);
1409
1410     JSObjectRef Function_prototype(CYCastJSObject(context, CYGetProperty(context, Function, prototype_s)));
1411     CYSetProperty(context, cy, CYJSString("Function_prototype"), Function_prototype);
1412
1413     JSObjectRef Object(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Object"))));
1414     CYSetProperty(context, cy, CYJSString("Object"), Object);
1415
1416     JSObjectRef Object_prototype(CYCastJSObject(context, CYGetProperty(context, Object, prototype_s)));
1417     CYSetProperty(context, cy, CYJSString("Object_prototype"), Object_prototype);
1418
1419     JSObjectRef String(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("String"))));
1420     CYSetProperty(context, cy, CYJSString("String"), String);
1421
1422     JSObjectRef String_prototype(CYCastJSObject(context, CYGetProperty(context, String, prototype_s)));
1423     CYSetProperty(context, cy, CYJSString("String_prototype"), String_prototype);
1424 /* }}} */
1425
1426     CYSetProperty(context, Array_prototype, toCYON_s, &Array_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1427     CYSetProperty(context, String_prototype, toCYON_s, &String_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1428
1429     JSObjectRef cycript(JSObjectMake(context, NULL, NULL));
1430     CYSetProperty(context, global, CYJSString("Cycript"), cycript);
1431     CYSetProperty(context, cycript, CYJSString("gc"), &Cycript_gc_callAsFunction);
1432
1433     JSObjectRef Functor(JSObjectMakeConstructor(context, Functor_, &Functor_new));
1434     JSObjectSetPrototype(context, CYCastJSObject(context, CYGetProperty(context, Functor, prototype_s)), Function_prototype);
1435     CYSetProperty(context, cycript, CYJSString("Functor"), Functor);
1436
1437     CYSetProperty(context, cycript, CYJSString("Pointer"), JSObjectMakeConstructor(context, Pointer_, &Pointer_new));
1438     CYSetProperty(context, cycript, CYJSString("Type"), JSObjectMakeConstructor(context, Type_privateData::Class_, &Type_new));
1439
1440     JSObjectRef all(JSObjectMake(context, All_, NULL));
1441     CYSetProperty(context, cycript, CYJSString("all"), all);
1442
1443     if (true) {
1444         JSObjectRef last(NULL), curr(global);
1445
1446         goto next; for (JSValueRef next;;) {
1447             if (JSValueIsNull(context, next))
1448                 break;
1449             last = curr;
1450             curr = CYCastJSObject(context, next);
1451           next:
1452             next = JSObjectGetPrototype(context, curr);
1453         }
1454
1455         JSObjectSetPrototype(context, last, all);
1456     }
1457
1458     CYSetProperty(context, global, CYJSString("$cyq"), &$cyq, kJSPropertyAttributeDontEnum);
1459
1460     JSObjectRef System(JSObjectMake(context, NULL, NULL));
1461     CYSetProperty(context, cy, CYJSString("System"), System);
1462
1463     CYSetProperty(context, global, CYJSString("system"), System);
1464     CYSetProperty(context, System, CYJSString("args"), CYJSNull(context));
1465     //CYSetProperty(context, System, CYJSString("global"), global);
1466     CYSetProperty(context, System, CYJSString("print"), &System_print);
1467
1468     if (hooks_ != NULL && hooks_->SetupContext != NULL)
1469         (*hooks_->SetupContext)(context);
1470 }
1471
1472 JSGlobalContextRef CYGetJSContext() {
1473     CYInitializeDynamic();
1474
1475     static JSGlobalContextRef context_;
1476
1477     if (context_ == NULL) {
1478         context_ = JSGlobalContextCreate(Global_);
1479         CYSetupContext(context_);
1480     }
1481
1482     return context_;
1483 }