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 <sqlite3.h>
  41
  42 #include "Internal.hpp"
  43
  44 #include <dlfcn.h>
  45 #include <iconv.h>
  46
  47 #include "cycript.hpp"
  48
  49 #include "sig/parse.hpp"
  50 #include "sig/ffi_type.hpp"
  51
  52 #include "Pooling.hpp"
  53
  54 #include <sys/mman.h>
  55
  56 #include <iostream>
  57 #include <ext/stdio_filebuf.h>
  58 #include <set>
  59 #include <map>
  60 #include <iomanip>
  61 #include <sstream>
  62 #include <cmath>
  63
  64 #include "Parser.hpp"
  65 #include "Cycript.tab.hh"
  66
  67 #include "Error.hpp"
  68 #include "JavaScript.hpp"
  69 #include "String.hpp"
  70
  71 char *sqlite3_column_pooled(apr_pool_t *pool, sqlite3_stmt *stmt, int n) {
  72     if (const unsigned char *value = sqlite3_column_text(stmt, n))
  73         return apr_pstrdup(pool, (const char *) value);
  74     else return NULL;
  75 }
  76
  77 struct CYHooks *hooks_;
  78
  79 /* JavaScript Properties {{{ */
  80 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, size_t index) {
  81     JSValueRef exception(NULL);
  82     JSValueRef value(JSObjectGetPropertyAtIndex(context, object, index, &exception));
  83     CYThrow(context, exception);
  84     return value;
  85 }
  86
  87 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, JSStringRef name) {
  88     JSValueRef exception(NULL);
  89     JSValueRef value(JSObjectGetProperty(context, object, name, &exception));
  90     CYThrow(context, exception);
  91     return value;
  92 }
  93
  94 void CYSetProperty(JSContextRef context, JSObjectRef object, size_t index, JSValueRef value) {
  95     JSValueRef exception(NULL);
  96     JSObjectSetPropertyAtIndex(context, object, index, value, &exception);
  97     CYThrow(context, exception);
  98 }
  99
 100 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef value, JSPropertyAttributes attributes) {
 101     JSValueRef exception(NULL);
 102     JSObjectSetProperty(context, object, name, value, attributes, &exception);
 103     CYThrow(context, exception);
 104 }
 105
 106 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef (*callback)(JSContextRef, JSObjectRef, JSObjectRef, size_t, const JSValueRef[], JSValueRef *), JSPropertyAttributes attributes) {
 107     CYSetProperty(context, object, name, JSObjectMakeFunctionWithCallback(context, name, callback), attributes);
 108 }
 109 /* }}} */
 110 /* JavaScript Strings {{{ */
 111 JSStringRef CYCopyJSString(const char *value) {
 112     return value == NULL ? NULL : JSStringCreateWithUTF8CString(value);
 113 }
 114
 115 JSStringRef CYCopyJSString(JSStringRef value) {
 116     return value == NULL ? NULL : JSStringRetain(value);
 117 }
 118
 119 JSStringRef CYCopyJSString(CYUTF8String value) {
 120     // XXX: this is very wrong; it needs to convert to UTF16 and then create from there
 121     return CYCopyJSString(value.data);
 122 }
 123
 124 JSStringRef CYCopyJSString(JSContextRef context, JSValueRef value) {
 125     if (JSValueIsNull(context, value))
 126         return NULL;
 127     JSValueRef exception(NULL);
 128     JSStringRef string(JSValueToStringCopy(context, value, &exception));
 129     CYThrow(context, exception);
 130     return string;
 131 }
 132
 133 static CYUTF16String CYCastUTF16String(JSStringRef value) {
 134     return CYUTF16String(JSStringGetCharactersPtr(value), JSStringGetLength(value));
 135 }
 136
 137 CYUTF8String CYPoolUTF8String(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 138     return CYPoolUTF8String(pool, CYCastUTF16String(value));
 139 }
 140
 141 const char *CYPoolCString(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 142     CYUTF8String utf8(CYPoolUTF8String(pool, context, value));
 143     _assert(memchr(utf8.data, '\0', utf8.size) == NULL);
 144     return utf8.data;
 145 }
 146
 147 const char *CYPoolCString(apr_pool_t *pool, JSContextRef context, JSValueRef value) {
 148     return JSValueIsNull(context, value) ? NULL : CYPoolCString(pool, context, CYJSString(context, value));
 149 }
 150 /* }}} */
 151 /* Index Offsets {{{ */
 152 size_t CYGetIndex(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 153     return CYGetIndex(CYPoolUTF8String(pool, context, value));
 154 }
 155 /* }}} */
 156
 157 static JSClassRef All_;
 158 static JSClassRef Context_;
 159 static JSClassRef Functor_;
 160 static JSClassRef Global_;
 161 static JSClassRef Pointer_;
 162 static JSClassRef Struct_;
 163
 164 JSStringRef Array_s;
 165 JSStringRef cy_s;
 166 JSStringRef length_s;
 167 JSStringRef message_s;
 168 JSStringRef name_s;
 169 JSStringRef pop_s;
 170 JSStringRef prototype_s;
 171 JSStringRef push_s;
 172 JSStringRef splice_s;
 173 JSStringRef toCYON_s;
 174 JSStringRef toJSON_s;
 175
 176 static JSStringRef Result_;
 177
 178 sqlite3 *Bridge_;
 179
 180 void CYFinalize(JSObjectRef object) {
 181     delete reinterpret_cast<CYData *>(JSObjectGetPrivate(object));
 182 }
 183
 184 struct CStringMapLess :
 185     std::binary_function<const char *, const char *, bool>
 186 {
 187     _finline bool operator ()(const char *lhs, const char *rhs) const {
 188         return strcmp(lhs, rhs) < 0;
 189     }
 190 };
 191
 192 void Structor_(apr_pool_t *pool, sig::Type *&type) {
 193     if (
 194         type->primitive == sig::pointer_P &&
 195         type->data.data.type != NULL &&
 196         type->data.data.type->primitive == sig::struct_P &&
 197         strcmp(type->data.data.type->name, "_objc_class") == 0
 198     ) {
 199         type->primitive = sig::typename_P;
 200         type->data.data.type = NULL;
 201         return;
 202     }
 203
 204     if (type->primitive != sig::struct_P || type->name == NULL)
 205         return;
 206
 207     sqlite3_stmt *statement;
 208
 209     _sqlcall(sqlite3_prepare(Bridge_,
 210         "select "
 211             "\"bridge\".\"mode\", "
 212             "\"bridge\".\"value\" "
 213         "from \"bridge\" "
 214         "where"
 215             " \"bridge\".\"mode\" in (3, 4) and"
 216             " \"bridge\".\"name\" = ?"
 217         " limit 1"
 218     , -1, &statement, NULL));
 219
 220     _sqlcall(sqlite3_bind_text(statement, 1, type->name, -1, SQLITE_STATIC));
 221
 222     int mode;
 223     const char *value;
 224
 225     if (_sqlcall(sqlite3_step(statement)) == SQLITE_DONE) {
 226         mode = -1;
 227         value = NULL;
 228     } else {
 229         mode = sqlite3_column_int(statement, 0);
 230         value = sqlite3_column_pooled(pool, statement, 1);
 231     }
 232
 233     _sqlcall(sqlite3_finalize(statement));
 234
 235     switch (mode) {
 236         default:
 237             _assert(false);
 238         case -1:
 239             break;
 240
 241         case 3: {
 242             sig::Parse(pool, &type->data.signature, value, &Structor_);
 243         } break;
 244
 245         case 4: {
 246             sig::Signature signature;
 247             sig::Parse(pool, &signature, value, &Structor_);
 248             type = signature.elements[0].type;
 249         } break;
 250     }
 251 }
 252
 253 JSClassRef Type_privateData::Class_;
 254
 255 struct Context :
 256     CYData
 257 {
 258     JSGlobalContextRef context_;
 259
 260     Context(JSGlobalContextRef context) :
 261         context_(context)
 262     {
 263     }
 264 };
 265
 266 struct Pointer :
 267     CYOwned
 268 {
 269     Type_privateData *type_;
 270     size_t length_;
 271
 272     Pointer(void *value, JSContextRef context, JSObjectRef owner, size_t length, sig::Type *type) :
 273         CYOwned(value, context, owner),
 274         type_(new(pool_) Type_privateData(type)),
 275         length_(length)
 276     {
 277     }
 278 };
 279
 280 struct Struct_privateData :
 281     CYOwned
 282 {
 283     Type_privateData *type_;
 284
 285     Struct_privateData(JSContextRef context, JSObjectRef owner) :
 286         CYOwned(NULL, context, owner)
 287     {
 288     }
 289 };
 290
 291 typedef std::map<const char *, Type_privateData *, CStringMapLess> TypeMap;
 292 static TypeMap Types_;
 293
 294 JSObjectRef CYMakeStruct(JSContextRef context, void *data, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 295     Struct_privateData *internal(new Struct_privateData(context, owner));
 296     apr_pool_t *pool(internal->pool_);
 297     Type_privateData *typical(new(pool) Type_privateData(type, ffi));
 298     internal->type_ = typical;
 299
 300     if (owner != NULL)
 301         internal->value_ = data;
 302     else {
 303         size_t size(typical->GetFFI()->size);
 304         void *copy(apr_palloc(internal->pool_, size));
 305         memcpy(copy, data, size);
 306         internal->value_ = copy;
 307     }
 308
 309     return JSObjectMake(context, Struct_, internal);
 310 }
 311
 312 JSValueRef CYCastJSValue(JSContextRef context, bool value) {
 313     return JSValueMakeBoolean(context, value);
 314 }
 315
 316 JSValueRef CYCastJSValue(JSContextRef context, double value) {
 317     return JSValueMakeNumber(context, value);
 318 }
 319
 320 #define CYCastJSValue_(Type_) \
 321     JSValueRef CYCastJSValue(JSContextRef context, Type_ value) { \
 322         return JSValueMakeNumber(context, static_cast<double>(value)); \
 323     }
 324
 325 CYCastJSValue_(int)
 326 CYCastJSValue_(unsigned int)
 327 CYCastJSValue_(long int)
 328 CYCastJSValue_(long unsigned int)
 329 CYCastJSValue_(long long int)
 330 CYCastJSValue_(long long unsigned int)
 331
 332 JSValueRef CYJSUndefined(JSContextRef context) {
 333     return JSValueMakeUndefined(context);
 334 }
 335
 336 double CYCastDouble(JSContextRef context, JSValueRef value) {
 337     JSValueRef exception(NULL);
 338     double number(JSValueToNumber(context, value, &exception));
 339     CYThrow(context, exception);
 340     return number;
 341 }
 342
 343 bool CYCastBool(JSContextRef context, JSValueRef value) {
 344     return JSValueToBoolean(context, value);
 345 }
 346
 347 JSValueRef CYJSNull(JSContextRef context) {
 348     return JSValueMakeNull(context);
 349 }
 350
 351 JSValueRef CYCastJSValue(JSContextRef context, JSStringRef value) {
 352     return value == NULL ? CYJSNull(context) : JSValueMakeString(context, value);
 353 }
 354
 355 JSValueRef CYCastJSValue(JSContextRef context, const char *value) {
 356     return CYCastJSValue(context, CYJSString(value));
 357 }
 358
 359 JSObjectRef CYCastJSObject(JSContextRef context, JSValueRef value) {
 360     JSValueRef exception(NULL);
 361     JSObjectRef object(JSValueToObject(context, value, &exception));
 362     CYThrow(context, exception);
 363     return object;
 364 }
 365
 366 JSValueRef CYCallAsFunction(JSContextRef context, JSObjectRef function, JSObjectRef _this, size_t count, const JSValueRef arguments[]) {
 367     JSValueRef exception(NULL);
 368     JSValueRef value(JSObjectCallAsFunction(context, function, _this, count, arguments, &exception));
 369     CYThrow(context, exception);
 370     return value;
 371 }
 372
 373 bool CYIsCallable(JSContextRef context, JSValueRef value) {
 374     return value != NULL && JSValueIsObject(context, value) && JSObjectIsFunction(context, (JSObjectRef) value);
 375 }
 376
 377 static JSValueRef System_print(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 378     if (count == 0)
 379         printf("\n");
 380     else {
 381         CYPool pool;
 382         printf("%s\n", CYPoolCString(pool, context, arguments[0]));
 383     }
 384
 385     return CYJSUndefined(context);
 386 } CYCatch }
 387
 388 static size_t Nonce_(0);
 389
 390 static JSValueRef $cyq(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 391     CYPool pool;
 392     const char *name(apr_psprintf(pool, "%s%"APR_SIZE_T_FMT"", CYPoolCString(pool, context, arguments[0]), Nonce_++));
 393     return CYCastJSValue(context, name);
 394 }
 395
 396 static JSValueRef Cycript_gc_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 397     JSGarbageCollect(context);
 398     return CYJSUndefined(context);
 399 }
 400
 401 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSValueRef value, JSValueRef *exception) { CYTry {
 402     switch (JSType type = JSValueGetType(context, value)) {
 403         case kJSTypeUndefined:
 404             return "undefined";
 405         case kJSTypeNull:
 406             return "null";
 407         case kJSTypeBoolean:
 408             return CYCastBool(context, value) ? "true" : "false";
 409
 410         case kJSTypeNumber: {
 411             std::ostringstream str;
 412             CYNumerify(str, CYCastDouble(context, value));
 413             std::string value(str.str());
 414             return apr_pstrmemdup(pool, value.c_str(), value.size());
 415         } break;
 416
 417         case kJSTypeString: {
 418             std::ostringstream str;
 419             CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, value)));
 420             CYStringify(str, string.data, string.size);
 421             std::string value(str.str());
 422             return apr_pstrmemdup(pool, value.c_str(), value.size());
 423         } break;
 424
 425         case kJSTypeObject:
 426             return CYPoolCCYON(pool, context, (JSObjectRef) value);
 427         default:
 428             throw CYJSError(context, "JSValueGetType() == 0x%x", type);
 429     }
 430 } CYCatch }
 431
 432 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSValueRef value) {
 433     JSValueRef exception(NULL);
 434     const char *cyon(CYPoolCCYON(pool, context, value, &exception));
 435     CYThrow(context, exception);
 436     return cyon;
 437 }
 438
 439 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSObjectRef object) {
 440     JSValueRef toCYON(CYGetProperty(context, object, toCYON_s));
 441     if (CYIsCallable(context, toCYON)) {
 442         JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toCYON, object, 0, NULL));
 443         _assert(value != NULL);
 444         return CYPoolCString(pool, context, value);
 445     }
 446
 447     JSValueRef toJSON(CYGetProperty(context, object, toJSON_s));
 448     if (CYIsCallable(context, toJSON)) {
 449         JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 450         JSValueRef exception(NULL);
 451         const char *cyon(CYPoolCCYON(pool, context, CYCallAsFunction(context, (JSObjectRef) toJSON, object, 1, arguments), &exception));
 452         CYThrow(context, exception);
 453         return cyon;
 454     }
 455
 456     std::ostringstream str;
 457
 458     str << '{';
 459
 460     // XXX: this is, sadly, going to leak
 461     JSPropertyNameArrayRef names(JSObjectCopyPropertyNames(context, object));
 462
 463     bool comma(false);
 464
 465     for (size_t index(0), count(JSPropertyNameArrayGetCount(names)); index != count; ++index) {
 466         JSStringRef name(JSPropertyNameArrayGetNameAtIndex(names, index));
 467         JSValueRef value(CYGetProperty(context, object, name));
 468
 469         if (comma)
 470             str << ',';
 471         else
 472             comma = true;
 473
 474         CYUTF8String string(CYPoolUTF8String(pool, context, name));
 475         if (CYIsKey(string))
 476             str << string.data;
 477         else
 478             CYStringify(str, string.data, string.size);
 479
 480         str << ':' << CYPoolCCYON(pool, context, value);
 481     }
 482
 483     str << '}';
 484
 485     JSPropertyNameArrayRelease(names);
 486
 487     std::string string(str.str());
 488     return apr_pstrmemdup(pool, string.c_str(), string.size());
 489 }
 490
 491 static JSValueRef Array_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 492     CYPool pool;
 493     std::ostringstream str;
 494
 495     str << '[';
 496
 497     JSValueRef length(CYGetProperty(context, _this, length_s));
 498     bool comma(false);
 499
 500     for (size_t index(0), count(CYCastDouble(context, length)); index != count; ++index) {
 501         JSValueRef value(CYGetProperty(context, _this, index));
 502
 503         if (comma)
 504             str << ',';
 505         else
 506             comma = true;
 507
 508         if (!JSValueIsUndefined(context, value))
 509             str << CYPoolCCYON(pool, context, value);
 510         else {
 511             str << ',';
 512             comma = false;
 513         }
 514     }
 515
 516     str << ']';
 517
 518     std::string value(str.str());
 519     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 520 } CYCatch }
 521
 522 JSObjectRef CYMakePointer(JSContextRef context, void *pointer, size_t length, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 523     Pointer *internal(new Pointer(pointer, context, owner, length, type));
 524     return JSObjectMake(context, Pointer_, internal);
 525 }
 526
 527 static JSObjectRef CYMakeFunctor(JSContextRef context, void (*function)(), const char *type) {
 528     cy::Functor *internal(new cy::Functor(type, function));
 529     return JSObjectMake(context, Functor_, internal);
 530 }
 531
 532 static bool CYGetOffset(apr_pool_t *pool, JSContextRef context, JSStringRef value, ssize_t &index) {
 533     return CYGetOffset(CYPoolCString(pool, context, value), index);
 534 }
 535
 536 void *CYCastPointer_(JSContextRef context, JSValueRef value) {
 537     switch (JSValueGetType(context, value)) {
 538         case kJSTypeNull:
 539             return NULL;
 540         /*case kJSTypeObject:
 541             if (JSValueIsObjectOfClass(context, value, Pointer_)) {
 542                 Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate((JSObjectRef) value)));
 543                 return internal->value_;
 544             }*/
 545         default:
 546             double number(CYCastDouble(context, value));
 547             if (std::isnan(number))
 548                 throw CYJSError(context, "cannot convert value to pointer");
 549             return reinterpret_cast<void *>(static_cast<uintptr_t>(static_cast<long long>(number)));
 550     }
 551 }
 552
 553 void CYPoolFFI(apr_pool_t *pool, JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, JSValueRef value) {
 554     switch (type->primitive) {
 555         case sig::boolean_P:
 556             *reinterpret_cast<bool *>(data) = JSValueToBoolean(context, value);
 557         break;
 558
 559 #define CYPoolFFI_(primitive, native) \
 560         case sig::primitive ## _P: \
 561             *reinterpret_cast<native *>(data) = CYCastDouble(context, value); \
 562         break;
 563
 564         CYPoolFFI_(uchar, unsigned char)
 565         CYPoolFFI_(char, char)
 566         CYPoolFFI_(ushort, unsigned short)
 567         CYPoolFFI_(short, short)
 568         CYPoolFFI_(ulong, unsigned long)
 569         CYPoolFFI_(long, long)
 570         CYPoolFFI_(uint, unsigned int)
 571         CYPoolFFI_(int, int)
 572         CYPoolFFI_(ulonglong, unsigned long long)
 573         CYPoolFFI_(longlong, long long)
 574         CYPoolFFI_(float, float)
 575         CYPoolFFI_(double, double)
 576
 577         case sig::array_P: {
 578             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 579             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 580             for (size_t index(0); index != type->data.data.size; ++index) {
 581                 ffi_type *field(ffi->elements[index]);
 582
 583                 JSValueRef rhs;
 584                 if (aggregate == NULL)
 585                     rhs = value;
 586                 else {
 587                     rhs = CYGetProperty(context, aggregate, index);
 588                     if (JSValueIsUndefined(context, rhs))
 589                         throw CYJSError(context, "unable to extract array value");
 590                 }
 591
 592                 CYPoolFFI(pool, context, type->data.data.type, field, base, rhs);
 593                 // XXX: alignment?
 594                 base += field->size;
 595             }
 596         } break;
 597
 598         case sig::pointer_P:
 599             *reinterpret_cast<void **>(data) = CYCastPointer<void *>(context, value);
 600         break;
 601
 602         case sig::string_P:
 603             *reinterpret_cast<const char **>(data) = CYPoolCString(pool, context, value);
 604         break;
 605
 606         case sig::struct_P: {
 607             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 608             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 609             for (size_t index(0); index != type->data.signature.count; ++index) {
 610                 sig::Element *element(&type->data.signature.elements[index]);
 611                 ffi_type *field(ffi->elements[index]);
 612
 613                 JSValueRef rhs;
 614                 if (aggregate == NULL)
 615                     rhs = value;
 616                 else {
 617                     rhs = CYGetProperty(context, aggregate, index);
 618                     if (JSValueIsUndefined(context, rhs)) {
 619                         if (element->name != NULL)
 620                             rhs = CYGetProperty(context, aggregate, CYJSString(element->name));
 621                         else
 622                             goto undefined;
 623                         if (JSValueIsUndefined(context, rhs)) undefined:
 624                             throw CYJSError(context, "unable to extract structure value");
 625                     }
 626                 }
 627
 628                 CYPoolFFI(pool, context, element->type, field, base, rhs);
 629                 // XXX: alignment?
 630                 base += field->size;
 631             }
 632         } break;
 633
 634         case sig::void_P:
 635         break;
 636
 637         default:
 638             if (hooks_ != NULL && hooks_->PoolFFI != NULL)
 639                 if ((*hooks_->PoolFFI)(pool, context, type, ffi, data, value))
 640                     return;
 641
 642             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 643     }
 644 }
 645
 646 JSValueRef CYFromFFI(JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, bool initialize, JSObjectRef owner) {
 647     switch (type->primitive) {
 648         case sig::boolean_P:
 649             return CYCastJSValue(context, *reinterpret_cast<bool *>(data));
 650
 651 #define CYFromFFI_(primitive, native) \
 652         case sig::primitive ## _P: \
 653             return CYCastJSValue(context, *reinterpret_cast<native *>(data)); \
 654
 655         CYFromFFI_(uchar, unsigned char)
 656         CYFromFFI_(char, char)
 657         CYFromFFI_(ushort, unsigned short)
 658         CYFromFFI_(short, short)
 659         CYFromFFI_(ulong, unsigned long)
 660         CYFromFFI_(long, long)
 661         CYFromFFI_(uint, unsigned int)
 662         CYFromFFI_(int, int)
 663         CYFromFFI_(ulonglong, unsigned long long)
 664         CYFromFFI_(longlong, long long)
 665         CYFromFFI_(float, float)
 666         CYFromFFI_(double, double)
 667
 668         case sig::array_P:
 669             if (void *pointer = data)
 670                 return CYMakePointer(context, pointer, type->data.data.size, type->data.data.type, NULL, owner);
 671             else goto null;
 672
 673         case sig::pointer_P:
 674             if (void *pointer = *reinterpret_cast<void **>(data))
 675                 return CYMakePointer(context, pointer, _not(size_t), type->data.data.type, NULL, owner);
 676             else goto null;
 677
 678         case sig::string_P:
 679             if (char *utf8 = *reinterpret_cast<char **>(data))
 680                 return CYCastJSValue(context, utf8);
 681             else goto null;
 682
 683         case sig::struct_P:
 684             return CYMakeStruct(context, data, type, ffi, owner);
 685         case sig::void_P:
 686             return CYJSUndefined(context);
 687
 688         null:
 689             return CYJSNull(context);
 690         default:
 691             if (hooks_ != NULL && hooks_->FromFFI != NULL)
 692                 if (JSValueRef value = (*hooks_->FromFFI)(context, type, ffi, data, initialize, owner))
 693                     return value;
 694
 695             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 696     }
 697 }
 698
 699 static void FunctionClosure_(ffi_cif *cif, void *result, void **arguments, void *arg) {
 700     Closure_privateData *internal(reinterpret_cast<Closure_privateData *>(arg));
 701
 702     JSContextRef context(internal->context_);
 703
 704     size_t count(internal->cif_.nargs);
 705     JSValueRef values[count];
 706
 707     for (size_t index(0); index != count; ++index)
 708         values[index] = CYFromFFI(context, internal->signature_.elements[1 + index].type, internal->cif_.arg_types[index], arguments[index]);
 709
 710     JSValueRef value(CYCallAsFunction(context, internal->function_, NULL, count, values));
 711     CYPoolFFI(NULL, context, internal->signature_.elements[0].type, internal->cif_.rtype, result, value);
 712 }
 713
 714 Closure_privateData *CYMakeFunctor_(JSContextRef context, JSObjectRef function, const char *type, void (*callback)(ffi_cif *, void *, void **, void *)) {
 715     // XXX: in case of exceptions this will leak
 716     // XXX: in point of fact, this may /need/ to leak :(
 717     Closure_privateData *internal(new Closure_privateData(context, function, type));
 718
 719     ffi_closure *closure((ffi_closure *) _syscall(mmap(
 720         NULL, sizeof(ffi_closure),
 721         PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE,
 722         -1, 0
 723     )));
 724
 725     ffi_status status(ffi_prep_closure(closure, &internal->cif_, callback, internal));
 726     _assert(status == FFI_OK);
 727
 728     _syscall(mprotect(closure, sizeof(*closure), PROT_READ | PROT_EXEC));
 729
 730     internal->value_ = closure;
 731
 732     return internal;
 733 }
 734
 735 static JSObjectRef CYMakeFunctor(JSContextRef context, JSObjectRef function, const char *type) {
 736     Closure_privateData *internal(CYMakeFunctor_(context, function, type, &FunctionClosure_));
 737     JSObjectRef object(JSObjectMake(context, Functor_, internal));
 738     // XXX: see above notes about needing to leak
 739     JSValueProtect(CYGetJSContext(context), object);
 740     return object;
 741 }
 742
 743 JSObjectRef CYGetCachedObject(JSContextRef context, JSStringRef name) {
 744     return CYCastJSObject(context, CYGetProperty(context, CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s)), name));
 745 }
 746
 747 static JSObjectRef CYMakeFunctor(JSContextRef context, JSValueRef value, const char *type) {
 748     JSObjectRef Function(CYGetCachedObject(context, CYJSString("Function")));
 749
 750     JSValueRef exception(NULL);
 751     bool function(JSValueIsInstanceOfConstructor(context, value, Function, &exception));
 752     CYThrow(context, exception);
 753
 754     if (function) {
 755         JSObjectRef function(CYCastJSObject(context, value));
 756         return CYMakeFunctor(context, function, type);
 757     } else {
 758         void (*function)()(CYCastPointer<void (*)()>(context, value));
 759         return CYMakeFunctor(context, function, type);
 760     }
 761 }
 762
 763 static bool Index_(apr_pool_t *pool, JSContextRef context, Struct_privateData *internal, JSStringRef property, ssize_t &index, uint8_t *&base) {
 764     Type_privateData *typical(internal->type_);
 765     sig::Type *type(typical->type_);
 766     if (type == NULL)
 767         return false;
 768
 769     const char *name(CYPoolCString(pool, context, property));
 770     size_t length(strlen(name));
 771     double number(CYCastDouble(name, length));
 772
 773     size_t count(type->data.signature.count);
 774
 775     if (std::isnan(number)) {
 776         if (property == NULL)
 777             return false;
 778
 779         sig::Element *elements(type->data.signature.elements);
 780
 781         for (size_t local(0); local != count; ++local) {
 782             sig::Element *element(&elements[local]);
 783             if (element->name != NULL && strcmp(name, element->name) == 0) {
 784                 index = local;
 785                 goto base;
 786             }
 787         }
 788
 789         return false;
 790     } else {
 791         index = static_cast<ssize_t>(number);
 792         if (index != number || index < 0 || static_cast<size_t>(index) >= count)
 793             return false;
 794     }
 795
 796   base:
 797     ffi_type **elements(typical->GetFFI()->elements);
 798
 799     base = reinterpret_cast<uint8_t *>(internal->value_);
 800     for (ssize_t local(0); local != index; ++local)
 801         base += elements[local]->size;
 802
 803     return true;
 804 }
 805
 806 static JSValueRef Pointer_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 807     CYPool pool;
 808     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 809
 810     if (JSStringIsEqual(property, length_s))
 811         return internal->length_ == _not(size_t) ? CYJSUndefined(context) : CYCastJSValue(context, internal->length_);
 812
 813     Type_privateData *typical(internal->type_);
 814
 815     if (typical->type_ == NULL)
 816         return NULL;
 817
 818     ssize_t offset;
 819     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 820         offset = 0;
 821     else if (!CYGetOffset(pool, context, property, offset))
 822         return NULL;
 823
 824     ffi_type *ffi(typical->GetFFI());
 825
 826     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 827     base += ffi->size * offset;
 828
 829     JSObjectRef owner(internal->GetOwner() ?: object);
 830     return CYFromFFI(context, typical->type_, ffi, base, false, owner);
 831 } CYCatch }
 832
 833 static bool Pointer_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 834     CYPool pool;
 835     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 836     Type_privateData *typical(internal->type_);
 837
 838     if (typical->type_ == NULL)
 839         return NULL;
 840
 841     ssize_t offset;
 842     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 843         offset = 0;
 844     else if (!CYGetOffset(pool, context, property, offset))
 845         return NULL;
 846
 847     ffi_type *ffi(typical->GetFFI());
 848
 849     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 850     base += ffi->size * offset;
 851
 852     CYPoolFFI(NULL, context, typical->type_, ffi, base, value);
 853     return true;
 854 } CYCatch }
 855
 856 static JSValueRef Struct_callAsFunction_$cya(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 857     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(_this)));
 858     Type_privateData *typical(internal->type_);
 859     return CYMakePointer(context, internal->value_, _not(size_t), typical->type_, typical->ffi_, _this);
 860 }
 861
 862 static JSValueRef Struct_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 863     CYPool pool;
 864     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 865     Type_privateData *typical(internal->type_);
 866
 867     ssize_t index;
 868     uint8_t *base;
 869
 870     if (!Index_(pool, context, internal, property, index, base))
 871         return NULL;
 872
 873     JSObjectRef owner(internal->GetOwner() ?: object);
 874
 875     return CYFromFFI(context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, false, owner);
 876 } CYCatch }
 877
 878 static bool Struct_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 879     CYPool pool;
 880     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 881     Type_privateData *typical(internal->type_);
 882
 883     ssize_t index;
 884     uint8_t *base;
 885
 886     if (!Index_(pool, context, internal, property, index, base))
 887         return false;
 888
 889     CYPoolFFI(NULL, context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, value);
 890     return true;
 891 } CYCatch }
 892
 893 static void Struct_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
 894     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 895     Type_privateData *typical(internal->type_);
 896     sig::Type *type(typical->type_);
 897
 898     if (type == NULL)
 899         return;
 900
 901     size_t count(type->data.signature.count);
 902     sig::Element *elements(type->data.signature.elements);
 903
 904     char number[32];
 905
 906     for (size_t index(0); index != count; ++index) {
 907         const char *name;
 908         name = elements[index].name;
 909
 910         if (name == NULL) {
 911             sprintf(number, "%zu", index);
 912             name = number;
 913         }
 914
 915         JSPropertyNameAccumulatorAddName(names, CYJSString(name));
 916     }
 917 }
 918
 919 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 {
 920     if (setups + count != signature->count - 1)
 921         throw CYJSError(context, "incorrect number of arguments to ffi function");
 922
 923     size_t size(setups + count);
 924     void *values[size];
 925     memcpy(values, setup, sizeof(void *) * setups);
 926
 927     for (size_t index(setups); index != size; ++index) {
 928         sig::Element *element(&signature->elements[index + 1]);
 929         ffi_type *ffi(cif->arg_types[index]);
 930         // XXX: alignment?
 931         values[index] = new(pool) uint8_t[ffi->size];
 932         CYPoolFFI(pool, context, element->type, ffi, values[index], arguments[index - setups]);
 933     }
 934
 935     uint8_t value[cif->rtype->size];
 936
 937     if (hooks_ != NULL && hooks_->CallFunction != NULL)
 938         (*hooks_->CallFunction)(context, cif, function, value, values);
 939     else
 940         ffi_call(cif, function, value, values);
 941
 942     return CYFromFFI(context, signature->elements[0].type, cif->rtype, value, initialize);
 943 } CYCatch }
 944
 945 static JSValueRef Functor_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 946     CYPool pool;
 947     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
 948     return CYCallFunction(pool, context, 0, NULL, count, arguments, false, exception, &internal->signature_, &internal->cif_, internal->GetValue());
 949 }
 950
 951 static JSObjectRef CYMakeType(JSContextRef context, const char *type) {
 952     Type_privateData *internal(new Type_privateData(type));
 953     return JSObjectMake(context, Type_privateData::Class_, internal);
 954 }
 955
 956 static JSObjectRef CYMakeType(JSContextRef context, sig::Type *type) {
 957     Type_privateData *internal(new Type_privateData(type));
 958     return JSObjectMake(context, Type_privateData::Class_, internal);
 959 }
 960
 961 static void *CYCastSymbol(const char *name) {
 962     return dlsym(RTLD_DEFAULT, name);
 963 }
 964
 965 static JSValueRef All_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 966     JSObjectRef global(CYGetGlobalObject(context));
 967     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
 968     if (JSValueRef value = CYGetProperty(context, cycript, property))
 969         if (!JSValueIsUndefined(context, value))
 970             return value;
 971
 972     CYPool pool;
 973     CYUTF8String name(CYPoolUTF8String(pool, context, property));
 974
 975     if (hooks_ != NULL && hooks_->RuntimeProperty != NULL)
 976         if (JSValueRef value = (*hooks_->RuntimeProperty)(context, name))
 977             return value;
 978
 979     sqlite3_stmt *statement;
 980
 981     _sqlcall(sqlite3_prepare(Bridge_,
 982         "select "
 983             "\"bridge\".\"mode\", "
 984             "\"bridge\".\"value\" "
 985         "from \"bridge\" "
 986         "where"
 987             " \"bridge\".\"name\" = ?"
 988         " limit 1"
 989     , -1, &statement, NULL));
 990
 991     _sqlcall(sqlite3_bind_text(statement, 1, name.data, name.size, SQLITE_STATIC));
 992
 993     int mode;
 994     const char *value;
 995
 996     if (_sqlcall(sqlite3_step(statement)) == SQLITE_DONE) {
 997         mode = -1;
 998         value = NULL;
 999     } else {
1000         mode = sqlite3_column_int(statement, 0);
1001         value = sqlite3_column_pooled(pool, statement, 1);
1002     }
1003
1004     _sqlcall(sqlite3_finalize(statement));
1005
1006     switch (mode) {
1007         default:
1008             CYThrow("invalid mode from bridge table: %d", mode);
1009         case -1:
1010             return NULL;
1011
1012         case 0:
1013             return JSEvaluateScript(CYGetJSContext(context), CYJSString(value), NULL, NULL, 0, NULL);
1014
1015         case 1:
1016             if (void (*symbol)() = reinterpret_cast<void (*)()>(CYCastSymbol(name.data)))
1017                 return CYMakeFunctor(context, symbol, value);
1018             else return NULL;
1019
1020         case 2:
1021             if (void *symbol = CYCastSymbol(name.data)) {
1022                 // XXX: this is horrendously inefficient
1023                 sig::Signature signature;
1024                 sig::Parse(pool, &signature, value, &Structor_);
1025                 ffi_cif cif;
1026                 sig::sig_ffi_cif(pool, &sig::ObjectiveC, &signature, &cif);
1027                 return CYFromFFI(context, signature.elements[0].type, cif.rtype, symbol);
1028             } else return NULL;
1029
1030         // XXX: implement case 3
1031         case 4:
1032             return CYMakeType(context, value);
1033     }
1034 } CYCatch }
1035
1036 static JSObjectRef Pointer_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1037     if (count != 2)
1038         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1039
1040     CYPool pool;
1041
1042     void *value(CYCastPointer<void *>(context, arguments[0]));
1043     const char *type(CYPoolCString(pool, context, arguments[1]));
1044
1045     sig::Signature signature;
1046     sig::Parse(pool, &signature, type, &Structor_);
1047
1048     return CYMakePointer(context, value, _not(size_t), signature.elements[0].type, NULL, NULL);
1049 } CYCatch }
1050
1051 static JSObjectRef Type_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1052     if (count != 1)
1053         throw CYJSError(context, "incorrect number of arguments to Type constructor");
1054     CYPool pool;
1055     const char *type(CYPoolCString(pool, context, arguments[0]));
1056     return CYMakeType(context, type);
1057 } CYCatch }
1058
1059 static JSValueRef Type_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1060     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1061
1062     sig::Type type;
1063
1064     if (JSStringIsEqualToUTF8CString(property, "$cyi")) {
1065         type.primitive = sig::pointer_P;
1066         type.data.data.size = 0;
1067     } else {
1068         CYPool pool;
1069         size_t index(CYGetIndex(pool, context, property));
1070         if (index == _not(size_t))
1071             return NULL;
1072         type.primitive = sig::array_P;
1073         type.data.data.size = index;
1074     }
1075
1076     type.name = NULL;
1077     type.flags = 0;
1078
1079     type.data.data.type = internal->type_;
1080
1081     return CYMakeType(context, &type);
1082 } CYCatch }
1083
1084 static JSValueRef Type_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1085     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1086
1087     if (count != 1)
1088         throw CYJSError(context, "incorrect number of arguments to type cast function");
1089     sig::Type *type(internal->type_);
1090     ffi_type *ffi(internal->GetFFI());
1091     // XXX: alignment?
1092     uint8_t value[ffi->size];
1093     CYPool pool;
1094     CYPoolFFI(pool, context, type, ffi, value, arguments[0]);
1095     return CYFromFFI(context, type, ffi, value);
1096 } CYCatch }
1097
1098 static JSObjectRef Type_callAsConstructor(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1099     if (count != 0)
1100         throw CYJSError(context, "incorrect number of arguments to type cast function");
1101     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1102
1103     sig::Type *type(internal->type_);
1104     size_t length;
1105
1106     if (type->primitive != sig::array_P)
1107         length = _not(size_t);
1108     else {
1109         length = type->data.data.size;
1110         type = type->data.data.type;
1111     }
1112
1113     void *value(malloc(internal->GetFFI()->size));
1114     return CYMakePointer(context, value, length, type, NULL, NULL);
1115 } CYCatch }
1116
1117 static JSObjectRef Functor_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1118     if (count != 2)
1119         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1120     CYPool pool;
1121     const char *type(CYPoolCString(pool, context, arguments[1]));
1122     return CYMakeFunctor(context, arguments[0], type);
1123 } CYCatch }
1124
1125 static JSValueRef CYValue_callAsFunction_valueOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1126     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1127     return CYCastJSValue(context, reinterpret_cast<uintptr_t>(internal->value_));
1128 } CYCatch }
1129
1130 static JSValueRef CYValue_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1131     return CYValue_callAsFunction_valueOf(context, object, _this, count, arguments, exception);
1132 }
1133
1134 static JSValueRef CYValue_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1135     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1136     char string[32];
1137     sprintf(string, "%p", internal->value_);
1138     return CYCastJSValue(context, string);
1139 } CYCatch }
1140
1141 static JSValueRef Pointer_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1142     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(_this)));
1143     if (internal->length_ != _not(size_t)) {
1144         JSObjectRef Array(CYGetCachedObject(context, Array_s));
1145         JSObjectRef toCYON(CYCastJSObject(context, CYGetProperty(context, Array, toCYON_s)));
1146         return CYCallAsFunction(context, toCYON, _this, count, arguments);
1147     } else {
1148         char string[32];
1149         sprintf(string, "%p", internal->value_);
1150         return CYCastJSValue(context, string);
1151     }
1152 } CYCatch }
1153
1154 static JSValueRef Type_callAsFunction_toString(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1155     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1156     CYPool pool;
1157     const char *type(sig::Unparse(pool, internal->type_));
1158     return CYCastJSValue(context, CYJSString(type));
1159 } CYCatch }
1160
1161 static JSValueRef Type_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1162     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1163     CYPool pool;
1164     const char *type(sig::Unparse(pool, internal->type_));
1165     size_t size(strlen(type));
1166     char *cyon(new(pool) char[12 + size + 1]);
1167     memcpy(cyon, "new Type(\"", 10);
1168     cyon[12 + size] = '\0';
1169     cyon[12 + size - 2] = '"';
1170     cyon[12 + size - 1] = ')';
1171     memcpy(cyon + 10, type, size);
1172     return CYCastJSValue(context, CYJSString(cyon));
1173 } CYCatch }
1174
1175 static JSValueRef Type_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1176     return Type_callAsFunction_toString(context, object, _this, count, arguments, exception);
1177 }
1178
1179 static JSStaticFunction Pointer_staticFunctions[4] = {
1180     {"toCYON", &Pointer_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1181     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1182     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1183     {NULL, NULL, 0}
1184 };
1185
1186 static JSStaticFunction Struct_staticFunctions[2] = {
1187     {"$cya", &Struct_callAsFunction_$cya, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1188     {NULL, NULL, 0}
1189 };
1190
1191 static JSStaticFunction Functor_staticFunctions[4] = {
1192     {"toCYON", &CYValue_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1193     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1194     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1195     {NULL, NULL, 0}
1196 };
1197
1198 namespace cy {
1199     JSStaticFunction const * const Functor::StaticFunctions = Functor_staticFunctions;
1200 }
1201
1202 static JSStaticFunction Type_staticFunctions[4] = {
1203     {"toCYON", &Type_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1204     {"toJSON", &Type_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1205     {"toString", &Type_callAsFunction_toString, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1206     {NULL, NULL, 0}
1207 };
1208
1209 static JSObjectRef (*JSObjectMakeArray$)(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, const char *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         result = exception;
1256         exception = NULL;
1257     }
1258
1259     if (JSValueIsUndefined(context, result))
1260         return NULL;
1261
1262     try {
1263         json = CYPoolCCYON(pool, context, result, &exception);
1264     } catch (const char *error) {
1265         return error;
1266     }
1267
1268     if (exception != NULL)
1269         goto error;
1270
1271     CYSetProperty(context, CYGetGlobalObject(context), Result_, result);
1272
1273     if (hooks_ != NULL && hooks_->ExecuteEnd != NULL)
1274         (*hooks_->ExecuteEnd)(context, handle);
1275     return json;
1276 }
1277
1278 extern "C" void CydgetSetupContext(JSGlobalContextRef context) {
1279     CYSetupContext(context);
1280 }
1281
1282 static bool initialized_ = false;
1283
1284 void CYInitializeDynamic() {
1285     if (!initialized_)
1286         initialized_ = true;
1287     else return;
1288
1289     CYInitializeStatic();
1290
1291     _sqlcall(sqlite3_open("/usr/lib/libcycript.db", &Bridge_));
1292
1293     JSObjectMakeArray$ = reinterpret_cast<JSObjectRef (*)(JSContextRef, size_t, const JSValueRef[], JSValueRef *)>(dlsym(RTLD_DEFAULT, "JSObjectMakeArray"));
1294
1295     JSClassDefinition definition;
1296
1297     definition = kJSClassDefinitionEmpty;
1298     definition.className = "All";
1299     definition.getProperty = &All_getProperty;
1300     All_ = JSClassCreate(&definition);
1301
1302     definition = kJSClassDefinitionEmpty;
1303     definition.className = "Context";
1304     definition.finalize = &CYFinalize;
1305     Context_ = JSClassCreate(&definition);
1306
1307     definition = kJSClassDefinitionEmpty;
1308     definition.className = "Functor";
1309     definition.staticFunctions = cy::Functor::StaticFunctions;
1310     definition.callAsFunction = &Functor_callAsFunction;
1311     definition.finalize = &CYFinalize;
1312     Functor_ = JSClassCreate(&definition);
1313
1314     definition = kJSClassDefinitionEmpty;
1315     definition.className = "Pointer";
1316     definition.staticFunctions = Pointer_staticFunctions;
1317     definition.getProperty = &Pointer_getProperty;
1318     definition.setProperty = &Pointer_setProperty;
1319     definition.finalize = &CYFinalize;
1320     Pointer_ = JSClassCreate(&definition);
1321
1322     definition = kJSClassDefinitionEmpty;
1323     definition.className = "Struct";
1324     definition.staticFunctions = Struct_staticFunctions;
1325     definition.getProperty = &Struct_getProperty;
1326     definition.setProperty = &Struct_setProperty;
1327     definition.getPropertyNames = &Struct_getPropertyNames;
1328     definition.finalize = &CYFinalize;
1329     Struct_ = JSClassCreate(&definition);
1330
1331     definition = kJSClassDefinitionEmpty;
1332     definition.className = "Type";
1333     definition.staticFunctions = Type_staticFunctions;
1334     definition.getProperty = &Type_getProperty;
1335     definition.callAsFunction = &Type_callAsFunction;
1336     definition.callAsConstructor = &Type_callAsConstructor;
1337     definition.finalize = &CYFinalize;
1338     Type_privateData::Class_ = JSClassCreate(&definition);
1339
1340     definition = kJSClassDefinitionEmpty;
1341     //definition.getProperty = &Global_getProperty;
1342     Global_ = JSClassCreate(&definition);
1343
1344     Array_s = JSStringCreateWithUTF8CString("Array");
1345     cy_s = JSStringCreateWithUTF8CString("$cy");
1346     length_s = JSStringCreateWithUTF8CString("length");
1347     message_s = JSStringCreateWithUTF8CString("message");
1348     name_s = JSStringCreateWithUTF8CString("name");
1349     pop_s = JSStringCreateWithUTF8CString("pop");
1350     prototype_s = JSStringCreateWithUTF8CString("prototype");
1351     push_s = JSStringCreateWithUTF8CString("push");
1352     splice_s = JSStringCreateWithUTF8CString("splice");
1353     toCYON_s = JSStringCreateWithUTF8CString("toCYON");
1354     toJSON_s = JSStringCreateWithUTF8CString("toJSON");
1355
1356     Result_ = JSStringCreateWithUTF8CString("_");
1357
1358     if (hooks_ != NULL && hooks_->Initialize != NULL)
1359         (*hooks_->Initialize)();
1360 }
1361
1362 void CYThrow(JSContextRef context, JSValueRef value) {
1363     if (value != NULL)
1364         throw CYJSError(context, value);
1365 }
1366
1367 const char *CYJSError::PoolCString(apr_pool_t *pool) const {
1368     // XXX: this used to be CYPoolCString
1369     return CYPoolCCYON(pool, context_, value_);
1370 }
1371
1372 JSValueRef CYJSError::CastJSValue(JSContextRef context) const {
1373     // XXX: what if the context is different?
1374     return value_;
1375 }
1376
1377 JSValueRef CYCastJSError(JSContextRef context, const char *message) {
1378     JSObjectRef Error(CYGetCachedObject(context, CYJSString("Error")));
1379
1380     JSValueRef arguments[1] = {CYCastJSValue(context, message)};
1381
1382     JSValueRef exception(NULL);
1383     JSValueRef value(JSObjectCallAsConstructor(context, Error, 1, arguments, &exception));
1384     CYThrow(context, exception);
1385
1386     return value;
1387 }
1388
1389 JSValueRef CYPoolError::CastJSValue(JSContextRef context) const {
1390     return CYCastJSError(context, message_);
1391 }
1392
1393 CYJSError::CYJSError(JSContextRef context, const char *format, ...) {
1394     _assert(context != NULL);
1395
1396     CYPool pool;
1397
1398     va_list args;
1399     va_start(args, format);
1400     const char *message(apr_pvsprintf(pool, format, args));
1401     va_end(args);
1402
1403     value_ = CYCastJSError(context, message);
1404 }
1405
1406 JSGlobalContextRef CYGetJSContext(JSContextRef context) {
1407     return reinterpret_cast<Context *>(JSObjectGetPrivate(CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s))))->context_;
1408 }
1409
1410 extern "C" void CYSetupContext(JSGlobalContextRef context) {
1411     CYInitializeDynamic();
1412
1413     JSObjectRef global(CYGetGlobalObject(context));
1414
1415     JSObjectRef cy(JSObjectMake(context, Context_, new Context(context)));
1416     CYSetProperty(context, global, cy_s, cy, kJSPropertyAttributeDontEnum);
1417
1418 /* Cache Globals {{{ */
1419     JSObjectRef Array(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Array"))));
1420     CYSetProperty(context, cy, CYJSString("Array"), Array);
1421
1422     JSObjectRef Array_prototype(CYCastJSObject(context, CYGetProperty(context, Array, prototype_s)));
1423     CYSetProperty(context, cy, CYJSString("Array_prototype"), Array_prototype);
1424
1425     JSObjectRef Error(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Error"))));
1426     CYSetProperty(context, cy, CYJSString("Error"), Error);
1427
1428     JSObjectRef Function(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Function"))));
1429     CYSetProperty(context, cy, CYJSString("Function"), Function);
1430
1431     JSObjectRef Function_prototype(CYCastJSObject(context, CYGetProperty(context, Function, prototype_s)));
1432     CYSetProperty(context, cy, CYJSString("Function_prototype"), Function_prototype);
1433
1434     JSObjectRef Object(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Object"))));
1435     CYSetProperty(context, cy, CYJSString("Object"), Object);
1436
1437     JSObjectRef Object_prototype(CYCastJSObject(context, CYGetProperty(context, Object, prototype_s)));
1438     CYSetProperty(context, cy, CYJSString("Object_prototype"), Object_prototype);
1439
1440     JSObjectRef String(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("String"))));
1441     CYSetProperty(context, cy, CYJSString("String"), String);
1442 /* }}} */
1443
1444     CYSetProperty(context, Array_prototype, toCYON_s, &Array_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1445
1446     JSObjectRef cycript(JSObjectMake(context, NULL, NULL));
1447     CYSetProperty(context, global, CYJSString("Cycript"), cycript);
1448     CYSetProperty(context, cycript, CYJSString("gc"), &Cycript_gc_callAsFunction);
1449
1450     JSObjectRef Functor(JSObjectMakeConstructor(context, Functor_, &Functor_new));
1451     JSObjectSetPrototype(context, CYCastJSObject(context, CYGetProperty(context, Functor, prototype_s)), Function_prototype);
1452     CYSetProperty(context, cycript, CYJSString("Functor"), Functor);
1453
1454     CYSetProperty(context, cycript, CYJSString("Pointer"), JSObjectMakeConstructor(context, Pointer_, &Pointer_new));
1455     CYSetProperty(context, cycript, CYJSString("Type"), JSObjectMakeConstructor(context, Type_privateData::Class_, &Type_new));
1456
1457     JSObjectRef all(JSObjectMake(context, All_, NULL));
1458     CYSetProperty(context, cycript, CYJSString("all"), all);
1459
1460     JSObjectRef last(NULL), curr(global);
1461
1462     goto next; for (JSValueRef next;;) {
1463         if (JSValueIsNull(context, next))
1464             break;
1465         last = curr;
1466         curr = CYCastJSObject(context, next);
1467       next:
1468         next = JSObjectGetPrototype(context, curr);
1469     }
1470
1471     JSObjectSetPrototype(context, last, all);
1472
1473     CYSetProperty(context, global, CYJSString("$cyq"), &$cyq);
1474
1475     JSObjectRef System(JSObjectMake(context, NULL, NULL));
1476     CYSetProperty(context, cy, CYJSString("System"), Function);
1477
1478     CYSetProperty(context, global, CYJSString("system"), System);
1479     CYSetProperty(context, System, CYJSString("args"), CYJSNull(context));
1480     //CYSetProperty(context, System, CYJSString("global"), global);
1481     CYSetProperty(context, System, CYJSString("print"), &System_print);
1482
1483     if (hooks_ != NULL && hooks_->SetupContext != NULL)
1484         (*hooks_->SetupContext)(context);
1485 }
1486
1487 JSGlobalContextRef CYGetJSContext() {
1488     CYInitializeDynamic();
1489
1490     static JSGlobalContextRef context_;
1491
1492     if (context_ == NULL) {
1493         context_ = JSGlobalContextCreate(Global_);
1494         CYSetupContext(context_);
1495     }
1496
1497     return context_;
1498 }