Execute.cpp

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2012  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU Lesser General Public License, Version 3 {{{ */
   6 /*
   7  * Cycript is free software: you can redistribute it and/or modify it under
   8  * the terms of the GNU Lesser General Public License as published by the
   9  * Free Software Foundation, either version 3 of the License, or (at your
  10  * option) any later version.
  11  *
  12  * Cycript is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  15  * License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public License
  18  * along with Cycript.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 #include "Internal.hpp"
  23
  24 #include <dlfcn.h>
  25 #include <iconv.h>
  26
  27 #include "cycript.hpp"
  28
  29 #include "sig/parse.hpp"
  30 #include "sig/ffi_type.hpp"
  31
  32 #include "Pooling.hpp"
  33 #include "Execute.hpp"
  34
  35 #include <sys/mman.h>
  36
  37 #include <iostream>
  38 #include <ext/stdio_filebuf.h>
  39 #include <set>
  40 #include <map>
  41 #include <iomanip>
  42 #include <sstream>
  43 #include <cmath>
  44
  45 #include "Parser.hpp"
  46 #include "Cycript.tab.hh"
  47
  48 #include "Error.hpp"
  49 #include "JavaScript.hpp"
  50 #include "String.hpp"
  51
  52 struct CYHooks *hooks_;
  53
  54 /* JavaScript Properties {{{ */
  55 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, size_t index) {
  56     JSValueRef exception(NULL);
  57     JSValueRef value(JSObjectGetPropertyAtIndex(context, object, index, &exception));
  58     CYThrow(context, exception);
  59     return value;
  60 }
  61
  62 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, JSStringRef name) {
  63     JSValueRef exception(NULL);
  64     JSValueRef value(JSObjectGetProperty(context, object, name, &exception));
  65     CYThrow(context, exception);
  66     return value;
  67 }
  68
  69 void CYSetProperty(JSContextRef context, JSObjectRef object, size_t index, JSValueRef value) {
  70     JSValueRef exception(NULL);
  71     JSObjectSetPropertyAtIndex(context, object, index, value, &exception);
  72     CYThrow(context, exception);
  73 }
  74
  75 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef value, JSPropertyAttributes attributes) {
  76     JSValueRef exception(NULL);
  77     JSObjectSetProperty(context, object, name, value, attributes, &exception);
  78     CYThrow(context, exception);
  79 }
  80
  81 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef (*callback)(JSContextRef, JSObjectRef, JSObjectRef, size_t, const JSValueRef[], JSValueRef *), JSPropertyAttributes attributes) {
  82     CYSetProperty(context, object, name, JSObjectMakeFunctionWithCallback(context, name, callback), attributes);
  83 }
  84 /* }}} */
  85 /* JavaScript Strings {{{ */
  86 JSStringRef CYCopyJSString(const char *value) {
  87     return value == NULL ? NULL : JSStringCreateWithUTF8CString(value);
  88 }
  89
  90 JSStringRef CYCopyJSString(JSStringRef value) {
  91     return value == NULL ? NULL : JSStringRetain(value);
  92 }
  93
  94 JSStringRef CYCopyJSString(CYUTF8String value) {
  95     // XXX: this is very wrong; it needs to convert to UTF16 and then create from there
  96     return CYCopyJSString(value.data);
  97 }
  98
  99 JSStringRef CYCopyJSString(JSContextRef context, JSValueRef value) {
 100     if (JSValueIsNull(context, value))
 101         return NULL;
 102     JSValueRef exception(NULL);
 103     JSStringRef string(JSValueToStringCopy(context, value, &exception));
 104     CYThrow(context, exception);
 105     return string;
 106 }
 107
 108 static CYUTF16String CYCastUTF16String(JSStringRef value) {
 109     return CYUTF16String(JSStringGetCharactersPtr(value), JSStringGetLength(value));
 110 }
 111
 112 CYUTF8String CYPoolUTF8String(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 113     return CYPoolUTF8String(pool, CYCastUTF16String(value));
 114 }
 115
 116 const char *CYPoolCString(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 117     CYUTF8String utf8(CYPoolUTF8String(pool, context, value));
 118     _assert(memchr(utf8.data, '\0', utf8.size) == NULL);
 119     return utf8.data;
 120 }
 121
 122 const char *CYPoolCString(apr_pool_t *pool, JSContextRef context, JSValueRef value) {
 123     return JSValueIsNull(context, value) ? NULL : CYPoolCString(pool, context, CYJSString(context, value));
 124 }
 125 /* }}} */
 126 /* Index Offsets {{{ */
 127 size_t CYGetIndex(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 128     return CYGetIndex(CYPoolUTF8String(pool, context, value));
 129 }
 130 /* }}} */
 131
 132 static JSClassRef All_;
 133 static JSClassRef Context_;
 134 static JSClassRef Functor_;
 135 static JSClassRef Global_;
 136 static JSClassRef Pointer_;
 137 static JSClassRef Struct_;
 138
 139 JSStringRef Array_s;
 140 JSStringRef cy_s;
 141 JSStringRef length_s;
 142 JSStringRef message_s;
 143 JSStringRef name_s;
 144 JSStringRef pop_s;
 145 JSStringRef prototype_s;
 146 JSStringRef push_s;
 147 JSStringRef splice_s;
 148 JSStringRef toCYON_s;
 149 JSStringRef toJSON_s;
 150 JSStringRef toPointer_s;
 151 JSStringRef toString_s;
 152
 153 static JSStringRef Result_;
 154
 155 void CYFinalize(JSObjectRef object) {
 156     CYData *internal(reinterpret_cast<CYData *>(JSObjectGetPrivate(object)));
 157     if (--internal->count_ == 0)
 158         delete internal;
 159 }
 160
 161 void Structor_(apr_pool_t *pool, sig::Type *&type) {
 162     if (
 163         type->primitive == sig::pointer_P &&
 164         type->data.data.type != NULL &&
 165         type->data.data.type->primitive == sig::struct_P &&
 166         type->data.data.type->name != NULL &&
 167         strcmp(type->data.data.type->name, "_objc_class") == 0
 168     ) {
 169         type->primitive = sig::typename_P;
 170         type->data.data.type = NULL;
 171         return;
 172     }
 173
 174     if (type->primitive != sig::struct_P || type->name == NULL)
 175         return;
 176
 177     size_t length(strlen(type->name));
 178     char keyed[length + 2];
 179     memcpy(keyed + 1, type->name, length + 1);
 180
 181     static const char *modes = "34";
 182     for (size_t i(0); i != 2; ++i) {
 183         char mode(modes[i]);
 184         keyed[0] = mode;
 185
 186         if (CYBridgeEntry *entry = CYBridgeHash(keyed, length + 1))
 187             switch (mode) {
 188                 case '3':
 189                     sig::Parse(pool, &type->data.signature, entry->value_, &Structor_);
 190                 break;
 191
 192                 case '4': {
 193                     sig::Signature signature;
 194                     sig::Parse(pool, &signature, entry->value_, &Structor_);
 195                     type = signature.elements[0].type;
 196                 } break;
 197             }
 198     }
 199 }
 200
 201 JSClassRef Type_privateData::Class_;
 202
 203 struct Context :
 204     CYData
 205 {
 206     JSGlobalContextRef context_;
 207
 208     Context(JSGlobalContextRef context) :
 209         context_(context)
 210     {
 211     }
 212 };
 213
 214 struct Pointer :
 215     CYOwned
 216 {
 217     Type_privateData *type_;
 218     size_t length_;
 219
 220     Pointer(void *value, JSContextRef context, JSObjectRef owner, size_t length, sig::Type *type) :
 221         CYOwned(value, context, owner),
 222         type_(new(pool_) Type_privateData(type)),
 223         length_(length)
 224     {
 225     }
 226 };
 227
 228 struct Struct_privateData :
 229     CYOwned
 230 {
 231     Type_privateData *type_;
 232
 233     Struct_privateData(JSContextRef context, JSObjectRef owner) :
 234         CYOwned(NULL, context, owner)
 235     {
 236     }
 237 };
 238
 239 typedef std::map<const char *, Type_privateData *, CYCStringLess> TypeMap;
 240 static TypeMap Types_;
 241
 242 JSObjectRef CYMakeStruct(JSContextRef context, void *data, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 243     Struct_privateData *internal(new Struct_privateData(context, owner));
 244     apr_pool_t *pool(internal->pool_);
 245     Type_privateData *typical(new(pool) Type_privateData(type, ffi));
 246     internal->type_ = typical;
 247
 248     if (owner != NULL)
 249         internal->value_ = data;
 250     else {
 251         size_t size(typical->GetFFI()->size);
 252         void *copy(apr_palloc(internal->pool_, size));
 253         memcpy(copy, data, size);
 254         internal->value_ = copy;
 255     }
 256
 257     return JSObjectMake(context, Struct_, internal);
 258 }
 259
 260 JSValueRef CYCastJSValue(JSContextRef context, bool value) {
 261     return JSValueMakeBoolean(context, value);
 262 }
 263
 264 JSValueRef CYCastJSValue(JSContextRef context, double value) {
 265     return JSValueMakeNumber(context, value);
 266 }
 267
 268 #define CYCastJSValue_(Type_) \
 269     JSValueRef CYCastJSValue(JSContextRef context, Type_ value) { \
 270         return JSValueMakeNumber(context, static_cast<double>(value)); \
 271     }
 272
 273 CYCastJSValue_(int)
 274 CYCastJSValue_(unsigned int)
 275 CYCastJSValue_(long int)
 276 CYCastJSValue_(long unsigned int)
 277 CYCastJSValue_(long long int)
 278 CYCastJSValue_(long long unsigned int)
 279
 280 JSValueRef CYJSUndefined(JSContextRef context) {
 281     return JSValueMakeUndefined(context);
 282 }
 283
 284 double CYCastDouble(JSContextRef context, JSValueRef value) {
 285     JSValueRef exception(NULL);
 286     double number(JSValueToNumber(context, value, &exception));
 287     CYThrow(context, exception);
 288     return number;
 289 }
 290
 291 bool CYCastBool(JSContextRef context, JSValueRef value) {
 292     return JSValueToBoolean(context, value);
 293 }
 294
 295 JSValueRef CYJSNull(JSContextRef context) {
 296     return JSValueMakeNull(context);
 297 }
 298
 299 JSValueRef CYCastJSValue(JSContextRef context, JSStringRef value) {
 300     return value == NULL ? CYJSNull(context) : JSValueMakeString(context, value);
 301 }
 302
 303 JSValueRef CYCastJSValue(JSContextRef context, const char *value) {
 304     return CYCastJSValue(context, CYJSString(value));
 305 }
 306
 307 JSObjectRef CYCastJSObject(JSContextRef context, JSValueRef value) {
 308     JSValueRef exception(NULL);
 309     JSObjectRef object(JSValueToObject(context, value, &exception));
 310     CYThrow(context, exception);
 311     return object;
 312 }
 313
 314 JSValueRef CYCallAsFunction(JSContextRef context, JSObjectRef function, JSObjectRef _this, size_t count, const JSValueRef arguments[]) {
 315     JSValueRef exception(NULL);
 316     JSValueRef value(JSObjectCallAsFunction(context, function, _this, count, arguments, &exception));
 317     CYThrow(context, exception);
 318     return value;
 319 }
 320
 321 bool CYIsCallable(JSContextRef context, JSValueRef value) {
 322     return value != NULL && JSValueIsObject(context, value) && JSObjectIsFunction(context, (JSObjectRef) value);
 323 }
 324
 325 static JSValueRef System_print(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 326     if (count == 0)
 327         printf("\n");
 328     else {
 329         CYPool pool;
 330         printf("%s\n", CYPoolCString(pool, context, arguments[0]));
 331     }
 332
 333     return CYJSUndefined(context);
 334 } CYCatch }
 335
 336 static size_t Nonce_(0);
 337
 338 static JSValueRef $cyq(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 339     CYPool pool;
 340     const char *name(apr_psprintf(pool, "%s%"APR_SIZE_T_FMT"", CYPoolCString(pool, context, arguments[0]), Nonce_++));
 341     return CYCastJSValue(context, name);
 342 }
 343
 344 static JSValueRef Cycript_gc_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 345     JSGarbageCollect(context);
 346     return CYJSUndefined(context);
 347 }
 348
 349 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSValueRef value, JSValueRef *exception) { CYTry {
 350     switch (JSType type = JSValueGetType(context, value)) {
 351         case kJSTypeUndefined:
 352             return "undefined";
 353         case kJSTypeNull:
 354             return "null";
 355         case kJSTypeBoolean:
 356             return CYCastBool(context, value) ? "true" : "false";
 357
 358         case kJSTypeNumber: {
 359             std::ostringstream str;
 360             CYNumerify(str, CYCastDouble(context, value));
 361             std::string value(str.str());
 362             return apr_pstrmemdup(pool, value.c_str(), value.size());
 363         } break;
 364
 365         case kJSTypeString: {
 366             std::ostringstream str;
 367             CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, value)));
 368             CYStringify(str, string.data, string.size);
 369             std::string value(str.str());
 370             return apr_pstrmemdup(pool, value.c_str(), value.size());
 371         } break;
 372
 373         case kJSTypeObject:
 374             return CYPoolCCYON(pool, context, (JSObjectRef) value);
 375         default:
 376             throw CYJSError(context, "JSValueGetType() == 0x%x", type);
 377     }
 378 } CYCatch }
 379
 380 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSValueRef value) {
 381     JSValueRef exception(NULL);
 382     const char *cyon(CYPoolCCYON(pool, context, value, &exception));
 383     CYThrow(context, exception);
 384     return cyon;
 385 }
 386
 387 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSObjectRef object) {
 388     JSValueRef toCYON(CYGetProperty(context, object, toCYON_s));
 389     if (CYIsCallable(context, toCYON)) {
 390         JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toCYON, object, 0, NULL));
 391         _assert(value != NULL);
 392         return CYPoolCString(pool, context, value);
 393     }
 394
 395     JSValueRef toJSON(CYGetProperty(context, object, toJSON_s));
 396     if (CYIsCallable(context, toJSON)) {
 397         JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 398         JSValueRef exception(NULL);
 399         const char *cyon(CYPoolCCYON(pool, context, CYCallAsFunction(context, (JSObjectRef) toJSON, object, 1, arguments), &exception));
 400         CYThrow(context, exception);
 401         return cyon;
 402     }
 403
 404     std::ostringstream str;
 405
 406     str << '{';
 407
 408     // XXX: this is, sadly, going to leak
 409     JSPropertyNameArrayRef names(JSObjectCopyPropertyNames(context, object));
 410
 411     bool comma(false);
 412
 413     for (size_t index(0), count(JSPropertyNameArrayGetCount(names)); index != count; ++index) {
 414         JSStringRef name(JSPropertyNameArrayGetNameAtIndex(names, index));
 415         JSValueRef value(CYGetProperty(context, object, name));
 416
 417         if (comma)
 418             str << ',';
 419         else
 420             comma = true;
 421
 422         CYUTF8String string(CYPoolUTF8String(pool, context, name));
 423         if (CYIsKey(string))
 424             str << string.data;
 425         else
 426             CYStringify(str, string.data, string.size);
 427
 428         str << ':' << CYPoolCCYON(pool, context, value);
 429     }
 430
 431     str << '}';
 432
 433     JSPropertyNameArrayRelease(names);
 434
 435     std::string string(str.str());
 436     return apr_pstrmemdup(pool, string.c_str(), string.size());
 437 }
 438
 439 static JSValueRef Array_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 440     CYPool pool;
 441     std::ostringstream str;
 442
 443     str << '[';
 444
 445     JSValueRef length(CYGetProperty(context, _this, length_s));
 446     bool comma(false);
 447
 448     for (size_t index(0), count(CYCastDouble(context, length)); index != count; ++index) {
 449         JSValueRef value(CYGetProperty(context, _this, index));
 450
 451         if (comma)
 452             str << ',';
 453         else
 454             comma = true;
 455
 456         if (!JSValueIsUndefined(context, value))
 457             str << CYPoolCCYON(pool, context, value);
 458         else {
 459             str << ',';
 460             comma = false;
 461         }
 462     }
 463
 464     str << ']';
 465
 466     std::string value(str.str());
 467     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 468 } CYCatch }
 469
 470 static JSValueRef String_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 471     CYPool pool;
 472     std::ostringstream str;
 473
 474     CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, _this)));
 475     CYStringify(str, string.data, string.size);
 476
 477     std::string value(str.str());
 478     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 479 } CYCatch }
 480
 481 JSObjectRef CYMakePointer(JSContextRef context, void *pointer, size_t length, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 482     Pointer *internal(new Pointer(pointer, context, owner, length, type));
 483     return JSObjectMake(context, Pointer_, internal);
 484 }
 485
 486 static JSObjectRef CYMakeFunctor(JSContextRef context, void (*function)(), const char *type, void **cache = NULL) {
 487     cy::Functor *internal;
 488
 489     if (cache != NULL && *cache != NULL) {
 490         internal = reinterpret_cast<cy::Functor *>(*cache);
 491         ++internal->count_;
 492     } else {
 493         internal = new cy::Functor(type, function);
 494
 495         if (cache != NULL) {
 496             *cache = internal;
 497             ++internal->count_;
 498         }
 499     }
 500
 501     return JSObjectMake(context, Functor_, internal);
 502 }
 503
 504 static bool CYGetOffset(apr_pool_t *pool, JSContextRef context, JSStringRef value, ssize_t &index) {
 505     return CYGetOffset(CYPoolCString(pool, context, value), index);
 506 }
 507
 508 void *CYCastPointer_(JSContextRef context, JSValueRef value) {
 509     switch (JSValueGetType(context, value)) {
 510         case kJSTypeNull:
 511             return NULL;
 512         case kJSTypeObject: {
 513             JSObjectRef object((JSObjectRef) value);
 514             if (JSValueIsObjectOfClass(context, value, Pointer_)) {
 515                 Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 516                 return internal->value_;
 517             }
 518             JSValueRef toPointer(CYGetProperty(context, object, toPointer_s));
 519             if (CYIsCallable(context, toPointer)) {
 520                 JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toPointer, object, 0, NULL));
 521                 _assert(value != NULL);
 522                 return CYCastPointer_(context, value);
 523             }
 524         } default:
 525             double number(CYCastDouble(context, value));
 526             if (std::isnan(number))
 527                 throw CYJSError(context, "cannot convert value to pointer");
 528             return reinterpret_cast<void *>(static_cast<uintptr_t>(static_cast<long long>(number)));
 529     }
 530 }
 531
 532 void CYPoolFFI(apr_pool_t *pool, JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, JSValueRef value) {
 533     switch (type->primitive) {
 534         case sig::boolean_P:
 535             *reinterpret_cast<bool *>(data) = JSValueToBoolean(context, value);
 536         break;
 537
 538 #define CYPoolFFI_(primitive, native) \
 539         case sig::primitive ## _P: \
 540             *reinterpret_cast<native *>(data) = CYCastDouble(context, value); \
 541         break;
 542
 543         CYPoolFFI_(uchar, unsigned char)
 544         CYPoolFFI_(char, char)
 545         CYPoolFFI_(ushort, unsigned short)
 546         CYPoolFFI_(short, short)
 547         CYPoolFFI_(ulong, unsigned long)
 548         CYPoolFFI_(long, long)
 549         CYPoolFFI_(uint, unsigned int)
 550         CYPoolFFI_(int, int)
 551         CYPoolFFI_(ulonglong, unsigned long long)
 552         CYPoolFFI_(longlong, long long)
 553         CYPoolFFI_(float, float)
 554         CYPoolFFI_(double, double)
 555
 556         case sig::array_P: {
 557             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 558             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 559             for (size_t index(0); index != type->data.data.size; ++index) {
 560                 ffi_type *field(ffi->elements[index]);
 561
 562                 JSValueRef rhs;
 563                 if (aggregate == NULL)
 564                     rhs = value;
 565                 else {
 566                     rhs = CYGetProperty(context, aggregate, index);
 567                     if (JSValueIsUndefined(context, rhs))
 568                         throw CYJSError(context, "unable to extract array value");
 569                 }
 570
 571                 CYPoolFFI(pool, context, type->data.data.type, field, base, rhs);
 572                 // XXX: alignment?
 573                 base += field->size;
 574             }
 575         } break;
 576
 577         case sig::pointer_P:
 578             *reinterpret_cast<void **>(data) = CYCastPointer<void *>(context, value);
 579         break;
 580
 581         case sig::string_P:
 582             *reinterpret_cast<const char **>(data) = CYPoolCString(pool, context, value);
 583         break;
 584
 585         case sig::struct_P: {
 586             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 587             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 588             for (size_t index(0); index != type->data.signature.count; ++index) {
 589                 sig::Element *element(&type->data.signature.elements[index]);
 590                 ffi_type *field(ffi->elements[index]);
 591
 592                 JSValueRef rhs;
 593                 if (aggregate == NULL)
 594                     rhs = value;
 595                 else {
 596                     rhs = CYGetProperty(context, aggregate, index);
 597                     if (JSValueIsUndefined(context, rhs)) {
 598                         if (element->name != NULL)
 599                             rhs = CYGetProperty(context, aggregate, CYJSString(element->name));
 600                         else
 601                             goto undefined;
 602                         if (JSValueIsUndefined(context, rhs)) undefined:
 603                             throw CYJSError(context, "unable to extract structure value");
 604                     }
 605                 }
 606
 607                 CYPoolFFI(pool, context, element->type, field, base, rhs);
 608                 // XXX: alignment?
 609                 base += field->size;
 610             }
 611         } break;
 612
 613         case sig::void_P:
 614         break;
 615
 616         default:
 617             if (hooks_ != NULL && hooks_->PoolFFI != NULL)
 618                 if ((*hooks_->PoolFFI)(pool, context, type, ffi, data, value))
 619                     return;
 620
 621             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 622     }
 623 }
 624
 625 JSValueRef CYFromFFI(JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, bool initialize, JSObjectRef owner) {
 626     switch (type->primitive) {
 627         case sig::boolean_P:
 628             return CYCastJSValue(context, *reinterpret_cast<bool *>(data));
 629
 630 #define CYFromFFI_(primitive, native) \
 631         case sig::primitive ## _P: \
 632             return CYCastJSValue(context, *reinterpret_cast<native *>(data)); \
 633
 634         CYFromFFI_(uchar, unsigned char)
 635         CYFromFFI_(char, char)
 636         CYFromFFI_(ushort, unsigned short)
 637         CYFromFFI_(short, short)
 638         CYFromFFI_(ulong, unsigned long)
 639         CYFromFFI_(long, long)
 640         CYFromFFI_(uint, unsigned int)
 641         CYFromFFI_(int, int)
 642         CYFromFFI_(ulonglong, unsigned long long)
 643         CYFromFFI_(longlong, long long)
 644         CYFromFFI_(float, float)
 645         CYFromFFI_(double, double)
 646
 647         case sig::array_P:
 648             if (void *pointer = data)
 649                 return CYMakePointer(context, pointer, type->data.data.size, type->data.data.type, NULL, owner);
 650             else goto null;
 651
 652         case sig::pointer_P:
 653             if (void *pointer = *reinterpret_cast<void **>(data))
 654                 return CYMakePointer(context, pointer, _not(size_t), type->data.data.type, NULL, owner);
 655             else goto null;
 656
 657         case sig::string_P:
 658             if (char *utf8 = *reinterpret_cast<char **>(data))
 659                 return CYCastJSValue(context, utf8);
 660             else goto null;
 661
 662         case sig::struct_P:
 663             return CYMakeStruct(context, data, type, ffi, owner);
 664         case sig::void_P:
 665             return CYJSUndefined(context);
 666
 667         null:
 668             return CYJSNull(context);
 669         default:
 670             if (hooks_ != NULL && hooks_->FromFFI != NULL)
 671                 if (JSValueRef value = (*hooks_->FromFFI)(context, type, ffi, data, initialize, owner))
 672                     return value;
 673
 674             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 675     }
 676 }
 677
 678 static void FunctionClosure_(ffi_cif *cif, void *result, void **arguments, void *arg) {
 679     Closure_privateData *internal(reinterpret_cast<Closure_privateData *>(arg));
 680
 681     JSContextRef context(internal->context_);
 682
 683     size_t count(internal->cif_.nargs);
 684     JSValueRef values[count];
 685
 686     for (size_t index(0); index != count; ++index)
 687         values[index] = CYFromFFI(context, internal->signature_.elements[1 + index].type, internal->cif_.arg_types[index], arguments[index]);
 688
 689     JSValueRef value(CYCallAsFunction(context, internal->function_, NULL, count, values));
 690     CYPoolFFI(NULL, context, internal->signature_.elements[0].type, internal->cif_.rtype, result, value);
 691 }
 692
 693 Closure_privateData *CYMakeFunctor_(JSContextRef context, JSObjectRef function, const char *type, void (*callback)(ffi_cif *, void *, void **, void *)) {
 694     // XXX: in case of exceptions this will leak
 695     // XXX: in point of fact, this may /need/ to leak :(
 696     Closure_privateData *internal(new Closure_privateData(context, function, type));
 697
 698 #if defined(__APPLE__) && defined(__arm__)
 699     void *executable;
 700     ffi_closure *writable(reinterpret_cast<ffi_closure *>(ffi_closure_alloc(sizeof(ffi_closure), &executable)));
 701
 702     ffi_status status(ffi_prep_closure_loc(writable, &internal->cif_, callback, internal, executable));
 703     _assert(status == FFI_OK);
 704
 705     internal->value_ = executable;
 706 #else
 707     ffi_closure *closure((ffi_closure *) _syscall(mmap(
 708         NULL, sizeof(ffi_closure),
 709         PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE,
 710         -1, 0
 711     )));
 712
 713     ffi_status status(ffi_prep_closure(closure, &internal->cif_, callback, internal));
 714     _assert(status == FFI_OK);
 715
 716     _syscall(mprotect(closure, sizeof(*closure), PROT_READ | PROT_EXEC));
 717
 718     internal->value_ = closure;
 719 #endif
 720
 721     return internal;
 722 }
 723
 724 static JSObjectRef CYMakeFunctor(JSContextRef context, JSObjectRef function, const char *type) {
 725     Closure_privateData *internal(CYMakeFunctor_(context, function, type, &FunctionClosure_));
 726     JSObjectRef object(JSObjectMake(context, Functor_, internal));
 727     // XXX: see above notes about needing to leak
 728     JSValueProtect(CYGetJSContext(context), object);
 729     return object;
 730 }
 731
 732 JSObjectRef CYGetCachedObject(JSContextRef context, JSStringRef name) {
 733     return CYCastJSObject(context, CYGetProperty(context, CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s)), name));
 734 }
 735
 736 static JSObjectRef CYMakeFunctor(JSContextRef context, JSValueRef value, const char *type) {
 737     JSObjectRef Function(CYGetCachedObject(context, CYJSString("Function")));
 738
 739     JSValueRef exception(NULL);
 740     bool function(JSValueIsInstanceOfConstructor(context, value, Function, &exception));
 741     CYThrow(context, exception);
 742
 743     if (function) {
 744         JSObjectRef function(CYCastJSObject(context, value));
 745         return CYMakeFunctor(context, function, type);
 746     } else {
 747         void (*function)()(CYCastPointer<void (*)()>(context, value));
 748         return CYMakeFunctor(context, function, type);
 749     }
 750 }
 751
 752 static bool Index_(apr_pool_t *pool, JSContextRef context, Struct_privateData *internal, JSStringRef property, ssize_t &index, uint8_t *&base) {
 753     Type_privateData *typical(internal->type_);
 754     sig::Type *type(typical->type_);
 755     if (type == NULL)
 756         return false;
 757
 758     const char *name(CYPoolCString(pool, context, property));
 759     size_t length(strlen(name));
 760     double number(CYCastDouble(name, length));
 761
 762     size_t count(type->data.signature.count);
 763
 764     if (std::isnan(number)) {
 765         if (property == NULL)
 766             return false;
 767
 768         sig::Element *elements(type->data.signature.elements);
 769
 770         for (size_t local(0); local != count; ++local) {
 771             sig::Element *element(&elements[local]);
 772             if (element->name != NULL && strcmp(name, element->name) == 0) {
 773                 index = local;
 774                 goto base;
 775             }
 776         }
 777
 778         return false;
 779     } else {
 780         index = static_cast<ssize_t>(number);
 781         if (index != number || index < 0 || static_cast<size_t>(index) >= count)
 782             return false;
 783     }
 784
 785   base:
 786     ffi_type **elements(typical->GetFFI()->elements);
 787
 788     base = reinterpret_cast<uint8_t *>(internal->value_);
 789     for (ssize_t local(0); local != index; ++local)
 790         base += elements[local]->size;
 791
 792     return true;
 793 }
 794
 795 static JSValueRef Pointer_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 796     CYPool pool;
 797     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 798
 799     if (JSStringIsEqual(property, length_s))
 800         return internal->length_ == _not(size_t) ? CYJSUndefined(context) : CYCastJSValue(context, internal->length_);
 801
 802     Type_privateData *typical(internal->type_);
 803
 804     if (typical->type_ == NULL)
 805         return NULL;
 806
 807     ssize_t offset;
 808     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 809         offset = 0;
 810     else if (!CYGetOffset(pool, context, property, offset))
 811         return NULL;
 812
 813     ffi_type *ffi(typical->GetFFI());
 814
 815     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 816     base += ffi->size * offset;
 817
 818     JSObjectRef owner(internal->GetOwner() ?: object);
 819     return CYFromFFI(context, typical->type_, ffi, base, false, owner);
 820 } CYCatch }
 821
 822 static bool Pointer_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 823     CYPool pool;
 824     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 825     Type_privateData *typical(internal->type_);
 826
 827     if (typical->type_ == NULL)
 828         return NULL;
 829
 830     ssize_t offset;
 831     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 832         offset = 0;
 833     else if (!CYGetOffset(pool, context, property, offset))
 834         return NULL;
 835
 836     ffi_type *ffi(typical->GetFFI());
 837
 838     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 839     base += ffi->size * offset;
 840
 841     CYPoolFFI(NULL, context, typical->type_, ffi, base, value);
 842     return true;
 843 } CYCatch }
 844
 845 static JSValueRef Struct_callAsFunction_$cya(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 846     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(_this)));
 847     Type_privateData *typical(internal->type_);
 848     return CYMakePointer(context, internal->value_, _not(size_t), typical->type_, typical->ffi_, _this);
 849 }
 850
 851 static JSValueRef Struct_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 852     CYPool pool;
 853     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 854     Type_privateData *typical(internal->type_);
 855
 856     ssize_t index;
 857     uint8_t *base;
 858
 859     if (!Index_(pool, context, internal, property, index, base))
 860         return NULL;
 861
 862     JSObjectRef owner(internal->GetOwner() ?: object);
 863
 864     return CYFromFFI(context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, false, owner);
 865 } CYCatch }
 866
 867 static bool Struct_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 868     CYPool pool;
 869     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 870     Type_privateData *typical(internal->type_);
 871
 872     ssize_t index;
 873     uint8_t *base;
 874
 875     if (!Index_(pool, context, internal, property, index, base))
 876         return false;
 877
 878     CYPoolFFI(NULL, context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, value);
 879     return true;
 880 } CYCatch }
 881
 882 static void Struct_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
 883     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 884     Type_privateData *typical(internal->type_);
 885     sig::Type *type(typical->type_);
 886
 887     if (type == NULL)
 888         return;
 889
 890     size_t count(type->data.signature.count);
 891     sig::Element *elements(type->data.signature.elements);
 892
 893     char number[32];
 894
 895     for (size_t index(0); index != count; ++index) {
 896         const char *name;
 897         name = elements[index].name;
 898
 899         if (name == NULL) {
 900             sprintf(number, "%zu", index);
 901             name = number;
 902         }
 903
 904         JSPropertyNameAccumulatorAddName(names, CYJSString(name));
 905     }
 906 }
 907
 908 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 {
 909     if (setups + count != signature->count - 1)
 910         throw CYJSError(context, "incorrect number of arguments to ffi function");
 911
 912     size_t size(setups + count);
 913     void *values[size];
 914     memcpy(values, setup, sizeof(void *) * setups);
 915
 916     for (size_t index(setups); index != size; ++index) {
 917         sig::Element *element(&signature->elements[index + 1]);
 918         ffi_type *ffi(cif->arg_types[index]);
 919         // XXX: alignment?
 920         values[index] = new(pool) uint8_t[ffi->size];
 921         CYPoolFFI(pool, context, element->type, ffi, values[index], arguments[index - setups]);
 922     }
 923
 924     uint8_t value[cif->rtype->size];
 925
 926     if (hooks_ != NULL && hooks_->CallFunction != NULL)
 927         (*hooks_->CallFunction)(context, cif, function, value, values);
 928     else
 929         ffi_call(cif, function, value, values);
 930
 931     return CYFromFFI(context, signature->elements[0].type, cif->rtype, value, initialize);
 932 } CYCatch }
 933
 934 static JSValueRef Functor_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 935     CYPool pool;
 936     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
 937     return CYCallFunction(pool, context, 0, NULL, count, arguments, false, exception, &internal->signature_, &internal->cif_, internal->GetValue());
 938 }
 939
 940 static JSObjectRef CYMakeType(JSContextRef context, const char *type) {
 941     Type_privateData *internal(new Type_privateData(type));
 942     return JSObjectMake(context, Type_privateData::Class_, internal);
 943 }
 944
 945 static JSObjectRef CYMakeType(JSContextRef context, sig::Type *type) {
 946     Type_privateData *internal(new Type_privateData(type));
 947     return JSObjectMake(context, Type_privateData::Class_, internal);
 948 }
 949
 950 static void *CYCastSymbol(const char *name) {
 951     return dlsym(RTLD_DEFAULT, name);
 952 }
 953
 954 static JSValueRef All_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 955     JSObjectRef global(CYGetGlobalObject(context));
 956     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
 957     JSObjectRef alls(CYCastJSObject(context, CYGetProperty(context, cycript, CYJSString("alls"))));
 958
 959     for (size_t i(0), count(CYArrayLength(context, alls)); i != count; ++i)
 960         if (JSObjectRef space = CYCastJSObject(context, CYArrayGet(context, alls, count - i - 1)))
 961             if (JSValueRef value = CYGetProperty(context, space, property))
 962                 if (!JSValueIsUndefined(context, value))
 963                     return value;
 964
 965     CYPool pool;
 966     CYUTF8String name(CYPoolUTF8String(pool, context, property));
 967
 968     size_t length(name.size);
 969     char keyed[length + 2];
 970     memcpy(keyed + 1, name.data, length + 1);
 971
 972     static const char *modes = "0124";
 973     for (size_t i(0); i != 4; ++i) {
 974         char mode(modes[i]);
 975         keyed[0] = mode;
 976
 977         if (CYBridgeEntry *entry = CYBridgeHash(keyed, length + 1))
 978             switch (mode) {
 979                 case '0':
 980                     return JSEvaluateScript(CYGetJSContext(context), CYJSString(entry->value_), NULL, NULL, 0, NULL);
 981
 982                 case '1':
 983                     if (void (*symbol)() = reinterpret_cast<void (*)()>(CYCastSymbol(name.data)))
 984                         return CYMakeFunctor(context, symbol, entry->value_, &entry->cache_);
 985                     else return NULL;
 986
 987                 case '2':
 988                     if (void *symbol = CYCastSymbol(name.data)) {
 989                         // XXX: this is horrendously inefficient
 990                         sig::Signature signature;
 991                         sig::Parse(pool, &signature, entry->value_, &Structor_);
 992                         ffi_cif cif;
 993                         sig::sig_ffi_cif(pool, &sig::ObjectiveC, &signature, &cif);
 994                         return CYFromFFI(context, signature.elements[0].type, cif.rtype, symbol);
 995                     } else return NULL;
 996
 997                 // XXX: implement case 3
 998                 case '4':
 999                     return CYMakeType(context, entry->value_);
1000             }
1001     }
1002
1003     return NULL;
1004 } CYCatch }
1005
1006 static void All_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
1007     JSObjectRef global(CYGetGlobalObject(context));
1008     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
1009     JSObjectRef alls(CYCastJSObject(context, CYGetProperty(context, cycript, CYJSString("alls"))));
1010
1011     for (size_t i(0), count(CYArrayLength(context, alls)); i != count; ++i)
1012         if (JSObjectRef space = CYCastJSObject(context, CYArrayGet(context, alls, count - i - 1))) {
1013             JSPropertyNameArrayRef subset(JSObjectCopyPropertyNames(context, space));
1014             for (size_t index(0), count(JSPropertyNameArrayGetCount(subset)); index != count; ++index)
1015                 JSPropertyNameAccumulatorAddName(names, JSPropertyNameArrayGetNameAtIndex(subset, index));
1016             JSPropertyNameArrayRelease(subset);
1017         }
1018 }
1019
1020 static JSObjectRef Pointer_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1021     if (count != 2)
1022         throw CYJSError(context, "incorrect number of arguments to Pointer constructor");
1023
1024     CYPool pool;
1025
1026     void *value(CYCastPointer<void *>(context, arguments[0]));
1027     const char *type(CYPoolCString(pool, context, arguments[1]));
1028
1029     sig::Signature signature;
1030     sig::Parse(pool, &signature, type, &Structor_);
1031
1032     return CYMakePointer(context, value, _not(size_t), signature.elements[0].type, NULL, NULL);
1033 } CYCatch }
1034
1035 static JSObjectRef Type_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1036     if (count != 1)
1037         throw CYJSError(context, "incorrect number of arguments to Type constructor");
1038     CYPool pool;
1039     const char *type(CYPoolCString(pool, context, arguments[0]));
1040     return CYMakeType(context, type);
1041 } CYCatch }
1042
1043 static JSValueRef Type_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1044     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1045
1046     sig::Type type;
1047
1048     if (JSStringIsEqualToUTF8CString(property, "$cyi")) {
1049         type.primitive = sig::pointer_P;
1050         type.data.data.size = 0;
1051     } else {
1052         CYPool pool;
1053         size_t index(CYGetIndex(pool, context, property));
1054         if (index == _not(size_t))
1055             return NULL;
1056         type.primitive = sig::array_P;
1057         type.data.data.size = index;
1058     }
1059
1060     type.name = NULL;
1061     type.flags = 0;
1062
1063     type.data.data.type = internal->type_;
1064
1065     return CYMakeType(context, &type);
1066 } CYCatch }
1067
1068 static JSValueRef Type_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1069     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1070
1071     if (count != 1)
1072         throw CYJSError(context, "incorrect number of arguments to type cast function");
1073     sig::Type *type(internal->type_);
1074     ffi_type *ffi(internal->GetFFI());
1075     // XXX: alignment?
1076     uint8_t value[ffi->size];
1077     CYPool pool;
1078     CYPoolFFI(pool, context, type, ffi, value, arguments[0]);
1079     return CYFromFFI(context, type, ffi, value);
1080 } CYCatch }
1081
1082 static JSObjectRef Type_callAsConstructor(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1083     if (count != 0)
1084         throw CYJSError(context, "incorrect number of arguments to type cast function");
1085     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1086
1087     sig::Type *type(internal->type_);
1088     size_t length;
1089
1090     if (type->primitive != sig::array_P)
1091         length = _not(size_t);
1092     else {
1093         length = type->data.data.size;
1094         type = type->data.data.type;
1095     }
1096
1097     void *value(malloc(internal->GetFFI()->size));
1098     return CYMakePointer(context, value, length, type, NULL, NULL);
1099 } CYCatch }
1100
1101 static JSObjectRef Functor_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1102     if (count != 2)
1103         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1104     CYPool pool;
1105     const char *type(CYPoolCString(pool, context, arguments[1]));
1106     return CYMakeFunctor(context, arguments[0], type);
1107 } CYCatch }
1108
1109 static JSValueRef CYValue_callAsFunction_valueOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1110     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1111     return CYCastJSValue(context, reinterpret_cast<uintptr_t>(internal->value_));
1112 } CYCatch }
1113
1114 static JSValueRef CYValue_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1115     return CYValue_callAsFunction_valueOf(context, object, _this, count, arguments, exception);
1116 }
1117
1118 static JSValueRef CYValue_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1119     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1120     char string[32];
1121     sprintf(string, "%p", internal->value_);
1122     return CYCastJSValue(context, string);
1123 } CYCatch }
1124
1125 static JSValueRef Pointer_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1126     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(_this)));
1127     if (internal->length_ != _not(size_t)) {
1128         JSObjectRef Array(CYGetCachedObject(context, Array_s));
1129         JSObjectRef toCYON(CYCastJSObject(context, CYGetProperty(context, Array, toCYON_s)));
1130         return CYCallAsFunction(context, toCYON, _this, count, arguments);
1131     } else {
1132         char string[32];
1133         sprintf(string, "%p", internal->value_);
1134         return CYCastJSValue(context, string);
1135     }
1136 } CYCatch }
1137
1138 static JSValueRef Type_getProperty_alignment(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) {
1139     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1140     return CYCastJSValue(context, internal->GetFFI()->alignment);
1141 }
1142
1143 static JSValueRef Type_getProperty_size(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) {
1144     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1145     return CYCastJSValue(context, internal->GetFFI()->size);
1146 }
1147
1148 static JSValueRef Type_callAsFunction_toString(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1149     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1150     CYPool pool;
1151     const char *type(sig::Unparse(pool, internal->type_));
1152     return CYCastJSValue(context, CYJSString(type));
1153 } CYCatch }
1154
1155 static JSValueRef Type_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1156     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1157     CYPool pool;
1158     const char *type(sig::Unparse(pool, internal->type_));
1159     size_t size(strlen(type));
1160     char *cyon(new(pool) char[12 + size + 1]);
1161     memcpy(cyon, "new Type(\"", 10);
1162     cyon[12 + size] = '\0';
1163     cyon[12 + size - 2] = '"';
1164     cyon[12 + size - 1] = ')';
1165     memcpy(cyon + 10, type, size);
1166     return CYCastJSValue(context, CYJSString(cyon));
1167 } CYCatch }
1168
1169 static JSValueRef Type_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1170     return Type_callAsFunction_toString(context, object, _this, count, arguments, exception);
1171 }
1172
1173 static JSStaticFunction Pointer_staticFunctions[4] = {
1174     {"toCYON", &Pointer_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1175     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1176     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1177     {NULL, NULL, 0}
1178 };
1179
1180 static JSStaticFunction Struct_staticFunctions[2] = {
1181     {"$cya", &Struct_callAsFunction_$cya, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1182     {NULL, NULL, 0}
1183 };
1184
1185 static JSStaticFunction Functor_staticFunctions[4] = {
1186     {"toCYON", &CYValue_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1187     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1188     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1189     {NULL, NULL, 0}
1190 };
1191
1192 namespace cy {
1193     JSStaticFunction const * const Functor::StaticFunctions = Functor_staticFunctions;
1194 }
1195
1196 static JSStaticValue Type_staticValues[3] = {
1197     {"alignment", &Type_getProperty_alignment, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1198     {"size", &Type_getProperty_size, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1199     {NULL, NULL, NULL, 0}
1200 };
1201
1202 static JSStaticFunction Type_staticFunctions[4] = {
1203     {"toCYON", &Type_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1204     {"toJSON", &Type_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1205     {"toString", &Type_callAsFunction_toString, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1206     {NULL, NULL, 0}
1207 };
1208
1209 static JSObjectRef (*JSObjectMakeArray$)(JSContextRef, size_t, const JSValueRef[], JSValueRef *);
1210
1211 void CYSetArgs(int argc, const char *argv[]) {
1212     JSContextRef context(CYGetJSContext());
1213     JSValueRef args[argc];
1214     for (int i(0); i != argc; ++i)
1215         args[i] = CYCastJSValue(context, argv[i]);
1216
1217     JSObjectRef array;
1218     if (JSObjectMakeArray$ != NULL) {
1219         JSValueRef exception(NULL);
1220         array = (*JSObjectMakeArray$)(context, argc, args, &exception);
1221         CYThrow(context, exception);
1222     } else {
1223         JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array")));
1224         JSValueRef value(CYCallAsFunction(context, Array, NULL, argc, args));
1225         array = CYCastJSObject(context, value);
1226     }
1227
1228     JSObjectRef System(CYGetCachedObject(context, CYJSString("System")));
1229     CYSetProperty(context, System, CYJSString("args"), array);
1230 }
1231
1232 JSObjectRef CYGetGlobalObject(JSContextRef context) {
1233     return JSContextGetGlobalObject(context);
1234 }
1235
1236 const char *CYExecute(apr_pool_t *pool, CYUTF8String code) {
1237     JSContextRef context(CYGetJSContext());
1238     JSValueRef exception(NULL), result;
1239
1240     void *handle;
1241     if (hooks_ != NULL && hooks_->ExecuteStart != NULL)
1242         handle = (*hooks_->ExecuteStart)(context);
1243     else
1244         handle = NULL;
1245
1246     const char *json;
1247
1248     try {
1249         result = JSEvaluateScript(context, CYJSString(code), NULL, NULL, 0, &exception);
1250     } catch (const char *error) {
1251         return error;
1252     }
1253
1254     if (exception != NULL) error:
1255         return CYPoolCString(pool, context, CYJSString(context, exception));
1256
1257     if (JSValueIsUndefined(context, result))
1258         return NULL;
1259
1260     try {
1261         json = CYPoolCCYON(pool, context, result, &exception);
1262     } catch (const char *error) {
1263         return error;
1264     }
1265
1266     if (exception != NULL)
1267         goto error;
1268
1269     CYSetProperty(context, CYGetGlobalObject(context), Result_, result);
1270
1271     if (hooks_ != NULL && hooks_->ExecuteEnd != NULL)
1272         (*hooks_->ExecuteEnd)(context, handle);
1273     return json;
1274 }
1275
1276 extern "C" void CydgetSetupContext(JSGlobalContextRef context) {
1277     CYSetupContext(context);
1278 }
1279
1280 static bool initialized_ = false;
1281
1282 void CYInitializeDynamic() {
1283     if (!initialized_)
1284         initialized_ = true;
1285     else return;
1286
1287     CYInitializeStatic();
1288
1289     JSObjectMakeArray$ = reinterpret_cast<JSObjectRef (*)(JSContextRef, size_t, const JSValueRef[], JSValueRef *)>(dlsym(RTLD_DEFAULT, "JSObjectMakeArray"));
1290
1291     JSClassDefinition definition;
1292
1293     definition = kJSClassDefinitionEmpty;
1294     definition.className = "All";
1295     definition.getProperty = &All_getProperty;
1296     definition.getPropertyNames = &All_getPropertyNames;
1297     All_ = JSClassCreate(&definition);
1298
1299     definition = kJSClassDefinitionEmpty;
1300     definition.className = "Context";
1301     definition.finalize = &CYFinalize;
1302     Context_ = JSClassCreate(&definition);
1303
1304     definition = kJSClassDefinitionEmpty;
1305     definition.className = "Functor";
1306     definition.staticFunctions = cy::Functor::StaticFunctions;
1307     definition.callAsFunction = &Functor_callAsFunction;
1308     definition.finalize = &CYFinalize;
1309     Functor_ = JSClassCreate(&definition);
1310
1311     definition = kJSClassDefinitionEmpty;
1312     definition.className = "Pointer";
1313     definition.staticFunctions = Pointer_staticFunctions;
1314     definition.getProperty = &Pointer_getProperty;
1315     definition.setProperty = &Pointer_setProperty;
1316     definition.finalize = &CYFinalize;
1317     Pointer_ = JSClassCreate(&definition);
1318
1319     definition = kJSClassDefinitionEmpty;
1320     definition.className = "Struct";
1321     definition.staticFunctions = Struct_staticFunctions;
1322     definition.getProperty = &Struct_getProperty;
1323     definition.setProperty = &Struct_setProperty;
1324     definition.getPropertyNames = &Struct_getPropertyNames;
1325     definition.finalize = &CYFinalize;
1326     Struct_ = JSClassCreate(&definition);
1327
1328     definition = kJSClassDefinitionEmpty;
1329     definition.className = "Type";
1330     definition.staticValues = Type_staticValues;
1331     definition.staticFunctions = Type_staticFunctions;
1332     definition.getProperty = &Type_getProperty;
1333     definition.callAsFunction = &Type_callAsFunction;
1334     definition.callAsConstructor = &Type_callAsConstructor;
1335     definition.finalize = &CYFinalize;
1336     Type_privateData::Class_ = JSClassCreate(&definition);
1337
1338     definition = kJSClassDefinitionEmpty;
1339     definition.className = "Global";
1340     //definition.getProperty = &Global_getProperty;
1341     Global_ = JSClassCreate(&definition);
1342
1343     Array_s = JSStringCreateWithUTF8CString("Array");
1344     cy_s = JSStringCreateWithUTF8CString("$cy");
1345     length_s = JSStringCreateWithUTF8CString("length");
1346     message_s = JSStringCreateWithUTF8CString("message");
1347     name_s = JSStringCreateWithUTF8CString("name");
1348     pop_s = JSStringCreateWithUTF8CString("pop");
1349     prototype_s = JSStringCreateWithUTF8CString("prototype");
1350     push_s = JSStringCreateWithUTF8CString("push");
1351     splice_s = JSStringCreateWithUTF8CString("splice");
1352     toCYON_s = JSStringCreateWithUTF8CString("toCYON");
1353     toJSON_s = JSStringCreateWithUTF8CString("toJSON");
1354     toPointer_s = JSStringCreateWithUTF8CString("toPointer");
1355     toString_s = JSStringCreateWithUTF8CString("toString");
1356
1357     Result_ = JSStringCreateWithUTF8CString("_");
1358
1359     if (hooks_ != NULL && hooks_->Initialize != NULL)
1360         (*hooks_->Initialize)();
1361 }
1362
1363 void CYThrow(JSContextRef context, JSValueRef value) {
1364     if (value != NULL)
1365         throw CYJSError(context, value);
1366 }
1367
1368 const char *CYJSError::PoolCString(apr_pool_t *pool) const {
1369     // XXX: this used to be CYPoolCString
1370     return CYPoolCCYON(pool, context_, value_);
1371 }
1372
1373 JSValueRef CYJSError::CastJSValue(JSContextRef context) const {
1374     // XXX: what if the context is different?
1375     return value_;
1376 }
1377
1378 JSValueRef CYCastJSError(JSContextRef context, const char *message) {
1379     JSObjectRef Error(CYGetCachedObject(context, CYJSString("Error")));
1380
1381     JSValueRef arguments[1] = {CYCastJSValue(context, message)};
1382
1383     JSValueRef exception(NULL);
1384     JSValueRef value(JSObjectCallAsConstructor(context, Error, 1, arguments, &exception));
1385     CYThrow(context, exception);
1386
1387     return value;
1388 }
1389
1390 JSValueRef CYPoolError::CastJSValue(JSContextRef context) const {
1391     return CYCastJSError(context, message_);
1392 }
1393
1394 CYJSError::CYJSError(JSContextRef context, const char *format, ...) {
1395     _assert(context != NULL);
1396
1397     CYPool pool;
1398
1399     va_list args;
1400     va_start(args, format);
1401     const char *message(apr_pvsprintf(pool, format, args));
1402     va_end(args);
1403
1404     value_ = CYCastJSError(context, message);
1405 }
1406
1407 JSGlobalContextRef CYGetJSContext(JSContextRef context) {
1408     return reinterpret_cast<Context *>(JSObjectGetPrivate(CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s))))->context_;
1409 }
1410
1411 extern "C" void CYSetupContext(JSGlobalContextRef context) {
1412     JSValueRef exception(NULL);
1413
1414     CYInitializeDynamic();
1415
1416     JSObjectRef global(CYGetGlobalObject(context));
1417
1418     JSObjectRef cy(JSObjectMake(context, Context_, new Context(context)));
1419     CYSetProperty(context, global, cy_s, cy, kJSPropertyAttributeDontEnum);
1420
1421 /* Cache Globals {{{ */
1422     JSObjectRef Array(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Array"))));
1423     CYSetProperty(context, cy, CYJSString("Array"), Array);
1424
1425     JSObjectRef Array_prototype(CYCastJSObject(context, CYGetProperty(context, Array, prototype_s)));
1426     CYSetProperty(context, cy, CYJSString("Array_prototype"), Array_prototype);
1427
1428     JSObjectRef Error(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Error"))));
1429     CYSetProperty(context, cy, CYJSString("Error"), Error);
1430
1431     JSObjectRef Function(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Function"))));
1432     CYSetProperty(context, cy, CYJSString("Function"), Function);
1433
1434     JSObjectRef Function_prototype(CYCastJSObject(context, CYGetProperty(context, Function, prototype_s)));
1435     CYSetProperty(context, cy, CYJSString("Function_prototype"), Function_prototype);
1436
1437     JSObjectRef Object(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Object"))));
1438     CYSetProperty(context, cy, CYJSString("Object"), Object);
1439
1440     JSObjectRef Object_prototype(CYCastJSObject(context, CYGetProperty(context, Object, prototype_s)));
1441     CYSetProperty(context, cy, CYJSString("Object_prototype"), Object_prototype);
1442
1443     JSObjectRef String(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("String"))));
1444     CYSetProperty(context, cy, CYJSString("String"), String);
1445
1446     JSObjectRef String_prototype(CYCastJSObject(context, CYGetProperty(context, String, prototype_s)));
1447     CYSetProperty(context, cy, CYJSString("String_prototype"), String_prototype);
1448 /* }}} */
1449
1450     CYSetProperty(context, Array_prototype, toCYON_s, &Array_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1451     CYSetProperty(context, String_prototype, toCYON_s, &String_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1452
1453     JSObjectRef cycript(JSObjectMake(context, NULL, NULL));
1454     CYSetProperty(context, global, CYJSString("Cycript"), cycript);
1455     CYSetProperty(context, cycript, CYJSString("gc"), &Cycript_gc_callAsFunction);
1456
1457     JSObjectRef Functor(JSObjectMakeConstructor(context, Functor_, &Functor_new));
1458     JSObjectSetPrototype(context, CYCastJSObject(context, CYGetProperty(context, Functor, prototype_s)), Function_prototype);
1459     CYSetProperty(context, cycript, CYJSString("Functor"), Functor);
1460
1461     CYSetProperty(context, cycript, CYJSString("Pointer"), JSObjectMakeConstructor(context, Pointer_, &Pointer_new));
1462     CYSetProperty(context, cycript, CYJSString("Type"), JSObjectMakeConstructor(context, Type_privateData::Class_, &Type_new));
1463
1464     JSObjectRef all(JSObjectMake(context, All_, NULL));
1465     CYSetProperty(context, cycript, CYJSString("all"), all);
1466
1467     JSObjectRef alls(JSObjectCallAsConstructor(context, Array, 0, NULL, &exception));
1468     CYThrow(context, exception);
1469     CYSetProperty(context, cycript, CYJSString("alls"), alls);
1470
1471     if (true) {
1472         JSObjectRef last(NULL), curr(global);
1473
1474         goto next; for (JSValueRef next;;) {
1475             if (JSValueIsNull(context, next))
1476                 break;
1477             last = curr;
1478             curr = CYCastJSObject(context, next);
1479           next:
1480             next = JSObjectGetPrototype(context, curr);
1481         }
1482
1483         JSObjectSetPrototype(context, last, all);
1484     }
1485
1486     CYSetProperty(context, global, CYJSString("$cyq"), &$cyq, kJSPropertyAttributeDontEnum);
1487
1488     JSObjectRef System(JSObjectMake(context, NULL, NULL));
1489     CYSetProperty(context, cy, CYJSString("System"), System);
1490
1491     CYSetProperty(context, global, CYJSString("system"), System);
1492     CYSetProperty(context, System, CYJSString("args"), CYJSNull(context));
1493     //CYSetProperty(context, System, CYJSString("global"), global);
1494     CYSetProperty(context, System, CYJSString("print"), &System_print);
1495
1496     if (hooks_ != NULL && hooks_->SetupContext != NULL)
1497         (*hooks_->SetupContext)(context);
1498
1499     CYArrayPush(context, alls, cycript);
1500 }
1501
1502 JSGlobalContextRef CYGetJSContext() {
1503     CYInitializeDynamic();
1504
1505     static JSGlobalContextRef context_;
1506
1507     if (context_ == NULL) {
1508         context_ = JSGlobalContextCreate(Global_);
1509         CYSetupContext(context_);
1510     }
1511
1512     return context_;
1513 }