Library.cpp

   1 /* Cycript - Inlining/Optimizing JavaScript Compiler
   2  * Copyright (C) 2009  Jay Freeman (saurik)
   3 */
   4
   5 /* Modified BSD License {{{ */
   6 /*
   7  *        Redistribution and use in source and binary
   8  * forms, with or without modification, are permitted
   9  * provided that the following conditions are met:
  10  *
  11  * 1. Redistributions of source code must retain the
  12  *    above copyright notice, this list of conditions
  13  *    and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the
  15  *    above copyright notice, this list of conditions
  16  *    and the following disclaimer in the documentation
  17  *    and/or other materials provided with the
  18  *    distribution.
  19  * 3. The name of the author may not be used to endorse
  20  *    or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS''
  24  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
  25  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  26  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
  28  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  29  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  30  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  31  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  34  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  35  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  36  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  37 */
  38 /* }}} */
  39
  40 #include <sqlite3.h>
  41
  42 #include "Internal.hpp"
  43
  44 #include <dlfcn.h>
  45 #include <iconv.h>
  46
  47 #include "cycript.hpp"
  48
  49 #include "sig/parse.hpp"
  50 #include "sig/ffi_type.hpp"
  51
  52 #include "Pooling.hpp"
  53
  54 #include <sys/mman.h>
  55
  56 #include <iostream>
  57 #include <ext/stdio_filebuf.h>
  58 #include <set>
  59 #include <map>
  60 #include <iomanip>
  61 #include <sstream>
  62 #include <cmath>
  63
  64 #include "Parser.hpp"
  65 #include "Cycript.tab.hh"
  66
  67 #include "Error.hpp"
  68 #include "JavaScript.hpp"
  69 #include "String.hpp"
  70
  71 #ifdef __OBJC__
  72 #define CYCatch_ \
  73     catch (NSException *error) { \
  74         CYThrow(context, error, exception); \
  75         return NULL; \
  76     }
  77 #else
  78 #define CYCatch_
  79 #endif
  80
  81 char *sqlite3_column_pooled(apr_pool_t *pool, sqlite3_stmt *stmt, int n) {
  82     if (const unsigned char *value = sqlite3_column_text(stmt, n))
  83         return apr_pstrdup(pool, (const char *) value);
  84     else return NULL;
  85 }
  86
  87 struct CYHooks *hooks_;
  88
  89 /* C Strings {{{ */
  90 template <typename Type_>
  91 _finline size_t iconv_(size_t (*iconv)(iconv_t, Type_, size_t *, char **, size_t *), iconv_t cd, char **inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft) {
  92     return iconv(cd, const_cast<Type_>(inbuf), inbytesleft, outbuf, outbytesleft);
  93 }
  94
  95 #ifdef __GLIBC__
  96 #define UCS_2_INTERNAL "UCS-2"
  97 #else
  98 #define UCS_2_INTERNAL "UCS-2-INTERNAL"
  99 #endif
 100
 101 CYUTF8String CYPoolUTF8String(apr_pool_t *pool, CYUTF16String utf16) {
 102     _assert(pool != NULL);
 103
 104     const char *in(reinterpret_cast<const char *>(utf16.data));
 105
 106     iconv_t conversion(_syscall(iconv_open("UTF-8", UCS_2_INTERNAL)));
 107
 108     // XXX: this is wrong
 109     size_t size(utf16.size * 5);
 110     char *out(new(pool) char[size]);
 111     CYUTF8String utf8(out, size);
 112
 113     size = utf16.size * 2;
 114     _syscall(iconv_(&iconv, conversion, const_cast<char **>(&in), &size, &out, &utf8.size));
 115
 116     *out = '\0';
 117     utf8.size = out - utf8.data;
 118
 119     _syscall(iconv_close(conversion));
 120
 121     return utf8;
 122 }
 123
 124 CYUTF16String CYPoolUTF16String(apr_pool_t *pool, CYUTF8String utf8) {
 125     _assert(pool != NULL);
 126
 127     const char *in(utf8.data);
 128
 129     iconv_t conversion(_syscall(iconv_open(UCS_2_INTERNAL, "UTF-8")));
 130
 131     // XXX: this is wrong
 132     size_t size(utf8.size * 5);
 133     uint16_t *temp(new (pool) uint16_t[size]);
 134     CYUTF16String utf16(temp, size * 2);
 135     char *out(reinterpret_cast<char *>(temp));
 136
 137     size = utf8.size;
 138     _syscall(iconv_(&iconv, conversion, const_cast<char **>(&in), &size, &out, &utf16.size));
 139
 140     utf16.size = reinterpret_cast<uint16_t *>(out) - utf16.data;
 141     temp[utf16.size] = 0;
 142
 143     _syscall(iconv_close(conversion));
 144
 145     return utf16;
 146 }
 147 /* }}} */
 148 /* JavaScript Properties {{{ */
 149 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, size_t index) {
 150     JSValueRef exception(NULL);
 151     JSValueRef value(JSObjectGetPropertyAtIndex(context, object, index, &exception));
 152     CYThrow(context, exception);
 153     return value;
 154 }
 155
 156 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, JSStringRef name) {
 157     JSValueRef exception(NULL);
 158     JSValueRef value(JSObjectGetProperty(context, object, name, &exception));
 159     CYThrow(context, exception);
 160     return value;
 161 }
 162
 163 void CYSetProperty(JSContextRef context, JSObjectRef object, size_t index, JSValueRef value) {
 164     JSValueRef exception(NULL);
 165     JSObjectSetPropertyAtIndex(context, object, index, value, &exception);
 166     CYThrow(context, exception);
 167 }
 168
 169 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef value, JSPropertyAttributes attributes) {
 170     JSValueRef exception(NULL);
 171     JSObjectSetProperty(context, object, name, value, attributes, &exception);
 172     CYThrow(context, exception);
 173 }
 174
 175 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef (*callback)(JSContextRef, JSObjectRef, JSObjectRef, size_t, const JSValueRef[], JSValueRef *), JSPropertyAttributes attributes) {
 176     CYSetProperty(context, object, name, JSObjectMakeFunctionWithCallback(context, name, callback), attributes);
 177 }
 178 /* }}} */
 179 /* JavaScript Strings {{{ */
 180 JSStringRef CYCopyJSString(const char *value) {
 181     return value == NULL ? NULL : JSStringCreateWithUTF8CString(value);
 182 }
 183
 184 JSStringRef CYCopyJSString(JSStringRef value) {
 185     return value == NULL ? NULL : JSStringRetain(value);
 186 }
 187
 188 JSStringRef CYCopyJSString(CYUTF8String value) {
 189     // XXX: this is very wrong; it needs to convert to UTF16 and then create from there
 190     return CYCopyJSString(value.data);
 191 }
 192
 193 JSStringRef CYCopyJSString(JSContextRef context, JSValueRef value) {
 194     if (JSValueIsNull(context, value))
 195         return NULL;
 196     JSValueRef exception(NULL);
 197     JSStringRef string(JSValueToStringCopy(context, value, &exception));
 198     CYThrow(context, exception);
 199     return string;
 200 }
 201
 202 static CYUTF16String CYCastUTF16String(JSStringRef value) {
 203     return CYUTF16String(JSStringGetCharactersPtr(value), JSStringGetLength(value));
 204 }
 205
 206 CYUTF8String CYPoolUTF8String(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 207     return CYPoolUTF8String(pool, CYCastUTF16String(value));
 208 }
 209
 210 const char *CYPoolCString(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 211     CYUTF8String utf8(CYPoolUTF8String(pool, context, value));
 212     _assert(memchr(utf8.data, '\0', utf8.size) == NULL);
 213     return utf8.data;
 214 }
 215
 216 const char *CYPoolCString(apr_pool_t *pool, JSContextRef context, JSValueRef value) {
 217     return JSValueIsNull(context, value) ? NULL : CYPoolCString(pool, context, CYJSString(context, value));
 218 }
 219 /* }}} */
 220
 221 /* Index Offsets {{{ */
 222 size_t CYGetIndex(const CYUTF8String &value) {
 223     if (value.data[0] != '0') {
 224         size_t index(0);
 225         for (size_t i(0); i != value.size; ++i) {
 226             if (!DigitRange_[value.data[i]])
 227                 return _not(size_t);
 228             index *= 10;
 229             index += value.data[i] - '0';
 230         }
 231         return index;
 232     } else if (value.size == 1)
 233         return 0;
 234     else
 235         return _not(size_t);
 236 }
 237
 238 size_t CYGetIndex(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 239     return CYGetIndex(CYPoolUTF8String(pool, context, value));
 240 }
 241
 242 // XXX: this isn't actually right
 243 bool CYGetOffset(const char *value, ssize_t &index) {
 244     if (value[0] != '0') {
 245         char *end;
 246         index = strtol(value, &end, 10);
 247         if (value + strlen(value) == end)
 248             return true;
 249     } else if (value[1] == '\0') {
 250         index = 0;
 251         return true;
 252     }
 253
 254     return false;
 255 }
 256 /* }}} */
 257
 258 /* JavaScript *ify {{{ */
 259 void CYStringify(std::ostringstream &str, const char *data, size_t size) {
 260     unsigned quot(0), apos(0);
 261     for (const char *value(data), *end(data + size); value != end; ++value)
 262         if (*value == '"')
 263             ++quot;
 264         else if (*value == '\'')
 265             ++apos;
 266
 267     bool single(quot > apos);
 268
 269     str << (single ? '\'' : '"');
 270
 271     for (const char *value(data), *end(data + size); value != end; ++value)
 272         switch (*value) {
 273             case '\\': str << "\\\\"; break;
 274             case '\b': str << "\\b"; break;
 275             case '\f': str << "\\f"; break;
 276             case '\n': str << "\\n"; break;
 277             case '\r': str << "\\r"; break;
 278             case '\t': str << "\\t"; break;
 279             case '\v': str << "\\v"; break;
 280
 281             case '"':
 282                 if (!single)
 283                     str << "\\\"";
 284                 else goto simple;
 285             break;
 286
 287             case '\'':
 288                 if (single)
 289                     str << "\\'";
 290                 else goto simple;
 291             break;
 292
 293             default:
 294                 // this test is designed to be "awesome", generating neither warnings nor incorrect results
 295                 if (*value < 0x20 || *value >= 0x7f)
 296                     str << "\\x" << std::setbase(16) << std::setw(2) << std::setfill('0') << unsigned(uint8_t(*value));
 297                 else simple:
 298                     str << *value;
 299         }
 300
 301     str << (single ? '\'' : '"');
 302 }
 303
 304 void CYNumerify(std::ostringstream &str, double value) {
 305     char string[32];
 306     // XXX: I want this to print 1e3 rather than 1000
 307     sprintf(string, "%.17g", value);
 308     str << string;
 309 }
 310
 311 bool CYIsKey(CYUTF8String value) {
 312     const char *data(value.data);
 313     size_t size(value.size);
 314
 315     if (size == 0)
 316         return false;
 317
 318     if (DigitRange_[data[0]]) {
 319         size_t index(CYGetIndex(value));
 320         if (index == _not(size_t))
 321             return false;
 322     } else {
 323         if (!WordStartRange_[data[0]])
 324             return false;
 325         for (size_t i(1); i != size; ++i)
 326             if (!WordEndRange_[data[i]])
 327                 return false;
 328     }
 329
 330     return true;
 331 }
 332 /* }}} */
 333
 334 static JSClassRef All_;
 335 static JSClassRef Context_;
 336 static JSClassRef Functor_;
 337 static JSClassRef Global_;
 338 static JSClassRef Pointer_;
 339 static JSClassRef Struct_;
 340
 341 JSStringRef Array_s;
 342 JSStringRef cy_s;
 343 JSStringRef length_s;
 344 JSStringRef message_s;
 345 JSStringRef name_s;
 346 JSStringRef pop_s;
 347 JSStringRef prototype_s;
 348 JSStringRef push_s;
 349 JSStringRef splice_s;
 350 JSStringRef toCYON_s;
 351 JSStringRef toJSON_s;
 352
 353 static JSStringRef Result_;
 354
 355 sqlite3 *Bridge_;
 356
 357 void CYFinalize(JSObjectRef object) {
 358     delete reinterpret_cast<CYData *>(JSObjectGetPrivate(object));
 359 }
 360
 361 struct CStringMapLess :
 362     std::binary_function<const char *, const char *, bool>
 363 {
 364     _finline bool operator ()(const char *lhs, const char *rhs) const {
 365         return strcmp(lhs, rhs) < 0;
 366     }
 367 };
 368
 369 void Structor_(apr_pool_t *pool, sig::Type *&type) {
 370     if (
 371         type->primitive == sig::pointer_P &&
 372         type->data.data.type != NULL &&
 373         type->data.data.type->primitive == sig::struct_P &&
 374         strcmp(type->data.data.type->name, "_objc_class") == 0
 375     ) {
 376         type->primitive = sig::typename_P;
 377         type->data.data.type = NULL;
 378         return;
 379     }
 380
 381     if (type->primitive != sig::struct_P || type->name == NULL)
 382         return;
 383
 384     sqlite3_stmt *statement;
 385
 386     _sqlcall(sqlite3_prepare(Bridge_,
 387         "select "
 388             "\"bridge\".\"mode\", "
 389             "\"bridge\".\"value\" "
 390         "from \"bridge\" "
 391         "where"
 392             " \"bridge\".\"mode\" in (3, 4) and"
 393             " \"bridge\".\"name\" = ?"
 394         " limit 1"
 395     , -1, &statement, NULL));
 396
 397     _sqlcall(sqlite3_bind_text(statement, 1, type->name, -1, SQLITE_STATIC));
 398
 399     int mode;
 400     const char *value;
 401
 402     if (_sqlcall(sqlite3_step(statement)) == SQLITE_DONE) {
 403         mode = -1;
 404         value = NULL;
 405     } else {
 406         mode = sqlite3_column_int(statement, 0);
 407         value = sqlite3_column_pooled(pool, statement, 1);
 408     }
 409
 410     _sqlcall(sqlite3_finalize(statement));
 411
 412     switch (mode) {
 413         default:
 414             _assert(false);
 415         case -1:
 416             break;
 417
 418         case 3: {
 419             sig::Parse(pool, &type->data.signature, value, &Structor_);
 420         } break;
 421
 422         case 4: {
 423             sig::Signature signature;
 424             sig::Parse(pool, &signature, value, &Structor_);
 425             type = signature.elements[0].type;
 426         } break;
 427     }
 428 }
 429
 430 JSClassRef Type_privateData::Class_;
 431
 432 struct Context :
 433     CYData
 434 {
 435     JSGlobalContextRef context_;
 436
 437     Context(JSGlobalContextRef context) :
 438         context_(context)
 439     {
 440     }
 441 };
 442
 443 struct Pointer :
 444     CYOwned
 445 {
 446     Type_privateData *type_;
 447     size_t length_;
 448
 449     Pointer(void *value, JSContextRef context, JSObjectRef owner, size_t length, sig::Type *type) :
 450         CYOwned(value, context, owner),
 451         type_(new(pool_) Type_privateData(type)),
 452         length_(length)
 453     {
 454     }
 455 };
 456
 457 struct Struct_privateData :
 458     CYOwned
 459 {
 460     Type_privateData *type_;
 461
 462     Struct_privateData(JSContextRef context, JSObjectRef owner) :
 463         CYOwned(NULL, context, owner)
 464     {
 465     }
 466 };
 467
 468 typedef std::map<const char *, Type_privateData *, CStringMapLess> TypeMap;
 469 static TypeMap Types_;
 470
 471 JSObjectRef CYMakeStruct(JSContextRef context, void *data, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 472     Struct_privateData *internal(new Struct_privateData(context, owner));
 473     apr_pool_t *pool(internal->pool_);
 474     Type_privateData *typical(new(pool) Type_privateData(type, ffi));
 475     internal->type_ = typical;
 476
 477     if (owner != NULL)
 478         internal->value_ = data;
 479     else {
 480         size_t size(typical->GetFFI()->size);
 481         void *copy(apr_palloc(internal->pool_, size));
 482         memcpy(copy, data, size);
 483         internal->value_ = copy;
 484     }
 485
 486     return JSObjectMake(context, Struct_, internal);
 487 }
 488
 489 JSValueRef CYCastJSValue(JSContextRef context, bool value) {
 490     return JSValueMakeBoolean(context, value);
 491 }
 492
 493 JSValueRef CYCastJSValue(JSContextRef context, double value) {
 494     return JSValueMakeNumber(context, value);
 495 }
 496
 497 #define CYCastJSValue_(Type_) \
 498     JSValueRef CYCastJSValue(JSContextRef context, Type_ value) { \
 499         return JSValueMakeNumber(context, static_cast<double>(value)); \
 500     }
 501
 502 CYCastJSValue_(int)
 503 CYCastJSValue_(unsigned int)
 504 CYCastJSValue_(long int)
 505 CYCastJSValue_(long unsigned int)
 506 CYCastJSValue_(long long int)
 507 CYCastJSValue_(long long unsigned int)
 508
 509 JSValueRef CYJSUndefined(JSContextRef context) {
 510     return JSValueMakeUndefined(context);
 511 }
 512
 513 double CYCastDouble(const char *value, size_t size) {
 514     char *end;
 515     double number(strtod(value, &end));
 516     if (end != value + size)
 517         return NAN;
 518     return number;
 519 }
 520
 521 double CYCastDouble(const char *value) {
 522     return CYCastDouble(value, strlen(value));
 523 }
 524
 525 double CYCastDouble(JSContextRef context, JSValueRef value) {
 526     JSValueRef exception(NULL);
 527     double number(JSValueToNumber(context, value, &exception));
 528     CYThrow(context, exception);
 529     return number;
 530 }
 531
 532 bool CYCastBool(JSContextRef context, JSValueRef value) {
 533     return JSValueToBoolean(context, value);
 534 }
 535
 536 JSValueRef CYJSNull(JSContextRef context) {
 537     return JSValueMakeNull(context);
 538 }
 539
 540 JSValueRef CYCastJSValue(JSContextRef context, JSStringRef value) {
 541     return value == NULL ? CYJSNull(context) : JSValueMakeString(context, value);
 542 }
 543
 544 JSValueRef CYCastJSValue(JSContextRef context, const char *value) {
 545     return CYCastJSValue(context, CYJSString(value));
 546 }
 547
 548 JSObjectRef CYCastJSObject(JSContextRef context, JSValueRef value) {
 549     JSValueRef exception(NULL);
 550     JSObjectRef object(JSValueToObject(context, value, &exception));
 551     CYThrow(context, exception);
 552     return object;
 553 }
 554
 555 JSValueRef CYCallAsFunction(JSContextRef context, JSObjectRef function, JSObjectRef _this, size_t count, const JSValueRef arguments[]) {
 556     JSValueRef exception(NULL);
 557     JSValueRef value(JSObjectCallAsFunction(context, function, _this, count, arguments, &exception));
 558     CYThrow(context, exception);
 559     return value;
 560 }
 561
 562 bool CYIsCallable(JSContextRef context, JSValueRef value) {
 563     return value != NULL && JSValueIsObject(context, value) && JSObjectIsFunction(context, (JSObjectRef) value);
 564 }
 565
 566 static JSValueRef System_print(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 567     if (count == 0)
 568         printf("\n");
 569     else {
 570         CYPool pool;
 571         printf("%s\n", CYPoolCString(pool, context, arguments[0]));
 572     }
 573
 574     return CYJSUndefined(context);
 575 } CYCatch }
 576
 577 static size_t Nonce_(0);
 578
 579 static JSValueRef $cyq(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 580     CYPool pool;
 581     const char *name(apr_psprintf(pool, "%s%"APR_SIZE_T_FMT"", CYPoolCString(pool, context, arguments[0]), Nonce_++));
 582     return CYCastJSValue(context, name);
 583 }
 584
 585 static JSValueRef Cycript_gc_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 586     JSGarbageCollect(context);
 587     return CYJSUndefined(context);
 588 }
 589
 590 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSValueRef value, JSValueRef *exception) { CYTry {
 591     switch (JSType type = JSValueGetType(context, value)) {
 592         case kJSTypeUndefined:
 593             return "undefined";
 594         case kJSTypeNull:
 595             return "null";
 596         case kJSTypeBoolean:
 597             return CYCastBool(context, value) ? "true" : "false";
 598
 599         case kJSTypeNumber: {
 600             std::ostringstream str;
 601             CYNumerify(str, CYCastDouble(context, value));
 602             std::string value(str.str());
 603             return apr_pstrmemdup(pool, value.c_str(), value.size());
 604         } break;
 605
 606         case kJSTypeString: {
 607             std::ostringstream str;
 608             CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, value)));
 609             CYStringify(str, string.data, string.size);
 610             std::string value(str.str());
 611             return apr_pstrmemdup(pool, value.c_str(), value.size());
 612         } break;
 613
 614         case kJSTypeObject:
 615             return CYPoolCCYON(pool, context, (JSObjectRef) value);
 616         default:
 617             throw CYJSError(context, "JSValueGetType() == 0x%x", type);
 618     }
 619 } CYCatch }
 620
 621 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSValueRef value) {
 622     JSValueRef exception(NULL);
 623     const char *cyon(CYPoolCCYON(pool, context, value, &exception));
 624     CYThrow(context, exception);
 625     return cyon;
 626 }
 627
 628 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSObjectRef object) {
 629     JSValueRef toCYON(CYGetProperty(context, object, toCYON_s));
 630     if (CYIsCallable(context, toCYON)) {
 631         JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toCYON, object, 0, NULL));
 632         _assert(value != NULL);
 633         return CYPoolCString(pool, context, value);
 634     }
 635
 636     JSValueRef toJSON(CYGetProperty(context, object, toJSON_s));
 637     if (CYIsCallable(context, toJSON)) {
 638         JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 639         JSValueRef exception(NULL);
 640         const char *cyon(CYPoolCCYON(pool, context, CYCallAsFunction(context, (JSObjectRef) toJSON, object, 1, arguments), &exception));
 641         CYThrow(context, exception);
 642         return cyon;
 643     }
 644
 645     std::ostringstream str;
 646
 647     str << '{';
 648
 649     // XXX: this is, sadly, going to leak
 650     JSPropertyNameArrayRef names(JSObjectCopyPropertyNames(context, object));
 651
 652     bool comma(false);
 653
 654     for (size_t index(0), count(JSPropertyNameArrayGetCount(names)); index != count; ++index) {
 655         JSStringRef name(JSPropertyNameArrayGetNameAtIndex(names, index));
 656         JSValueRef value(CYGetProperty(context, object, name));
 657
 658         if (comma)
 659             str << ',';
 660         else
 661             comma = true;
 662
 663         CYUTF8String string(CYPoolUTF8String(pool, context, name));
 664         if (CYIsKey(string))
 665             str << string.data;
 666         else
 667             CYStringify(str, string.data, string.size);
 668
 669         str << ':' << CYPoolCCYON(pool, context, value);
 670     }
 671
 672     str << '}';
 673
 674     JSPropertyNameArrayRelease(names);
 675
 676     std::string string(str.str());
 677     return apr_pstrmemdup(pool, string.c_str(), string.size());
 678 }
 679
 680 static JSValueRef Array_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 681     CYPool pool;
 682     std::ostringstream str;
 683
 684     str << '[';
 685
 686     JSValueRef length(CYGetProperty(context, _this, length_s));
 687     bool comma(false);
 688
 689     for (size_t index(0), count(CYCastDouble(context, length)); index != count; ++index) {
 690         JSValueRef value(CYGetProperty(context, _this, index));
 691
 692         if (comma)
 693             str << ',';
 694         else
 695             comma = true;
 696
 697         if (!JSValueIsUndefined(context, value))
 698             str << CYPoolCCYON(pool, context, value);
 699         else {
 700             str << ',';
 701             comma = false;
 702         }
 703     }
 704
 705     str << ']';
 706
 707     std::string value(str.str());
 708     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 709 } CYCatch }
 710
 711 JSObjectRef CYMakePointer(JSContextRef context, void *pointer, size_t length, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 712     Pointer *internal(new Pointer(pointer, context, owner, length, type));
 713     return JSObjectMake(context, Pointer_, internal);
 714 }
 715
 716 static JSObjectRef CYMakeFunctor(JSContextRef context, void (*function)(), const char *type) {
 717     cy::Functor *internal(new cy::Functor(type, function));
 718     return JSObjectMake(context, Functor_, internal);
 719 }
 720
 721 static bool CYGetOffset(apr_pool_t *pool, JSContextRef context, JSStringRef value, ssize_t &index) {
 722     return CYGetOffset(CYPoolCString(pool, context, value), index);
 723 }
 724
 725 void *CYCastPointer_(JSContextRef context, JSValueRef value) {
 726     switch (JSValueGetType(context, value)) {
 727         case kJSTypeNull:
 728             return NULL;
 729         /*case kJSTypeObject:
 730             if (JSValueIsObjectOfClass(context, value, Pointer_)) {
 731                 Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate((JSObjectRef) value)));
 732                 return internal->value_;
 733             }*/
 734         default:
 735             double number(CYCastDouble(context, value));
 736             if (std::isnan(number))
 737                 throw CYJSError(context, "cannot convert value to pointer");
 738             return reinterpret_cast<void *>(static_cast<uintptr_t>(static_cast<long long>(number)));
 739     }
 740 }
 741
 742 void CYPoolFFI(apr_pool_t *pool, JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, JSValueRef value) {
 743     switch (type->primitive) {
 744         case sig::boolean_P:
 745             *reinterpret_cast<bool *>(data) = JSValueToBoolean(context, value);
 746         break;
 747
 748 #define CYPoolFFI_(primitive, native) \
 749         case sig::primitive ## _P: \
 750             *reinterpret_cast<native *>(data) = CYCastDouble(context, value); \
 751         break;
 752
 753         CYPoolFFI_(uchar, unsigned char)
 754         CYPoolFFI_(char, char)
 755         CYPoolFFI_(ushort, unsigned short)
 756         CYPoolFFI_(short, short)
 757         CYPoolFFI_(ulong, unsigned long)
 758         CYPoolFFI_(long, long)
 759         CYPoolFFI_(uint, unsigned int)
 760         CYPoolFFI_(int, int)
 761         CYPoolFFI_(ulonglong, unsigned long long)
 762         CYPoolFFI_(longlong, long long)
 763         CYPoolFFI_(float, float)
 764         CYPoolFFI_(double, double)
 765
 766         case sig::array_P: {
 767             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 768             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 769             for (size_t index(0); index != type->data.data.size; ++index) {
 770                 ffi_type *field(ffi->elements[index]);
 771
 772                 JSValueRef rhs;
 773                 if (aggregate == NULL)
 774                     rhs = value;
 775                 else {
 776                     rhs = CYGetProperty(context, aggregate, index);
 777                     if (JSValueIsUndefined(context, rhs))
 778                         throw CYJSError(context, "unable to extract array value");
 779                 }
 780
 781                 CYPoolFFI(pool, context, type->data.data.type, field, base, rhs);
 782                 // XXX: alignment?
 783                 base += field->size;
 784             }
 785         } break;
 786
 787         case sig::pointer_P:
 788             *reinterpret_cast<void **>(data) = CYCastPointer<void *>(context, value);
 789         break;
 790
 791         case sig::string_P:
 792             *reinterpret_cast<const char **>(data) = CYPoolCString(pool, context, value);
 793         break;
 794
 795         case sig::struct_P: {
 796             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 797             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 798             for (size_t index(0); index != type->data.signature.count; ++index) {
 799                 sig::Element *element(&type->data.signature.elements[index]);
 800                 ffi_type *field(ffi->elements[index]);
 801
 802                 JSValueRef rhs;
 803                 if (aggregate == NULL)
 804                     rhs = value;
 805                 else {
 806                     rhs = CYGetProperty(context, aggregate, index);
 807                     if (JSValueIsUndefined(context, rhs)) {
 808                         if (element->name != NULL)
 809                             rhs = CYGetProperty(context, aggregate, CYJSString(element->name));
 810                         else
 811                             goto undefined;
 812                         if (JSValueIsUndefined(context, rhs)) undefined:
 813                             throw CYJSError(context, "unable to extract structure value");
 814                     }
 815                 }
 816
 817                 CYPoolFFI(pool, context, element->type, field, base, rhs);
 818                 // XXX: alignment?
 819                 base += field->size;
 820             }
 821         } break;
 822
 823         case sig::void_P:
 824         break;
 825
 826         default:
 827             if (hooks_ != NULL && hooks_->PoolFFI != NULL)
 828                 if ((*hooks_->PoolFFI)(pool, context, type, ffi, data, value))
 829                     return;
 830
 831             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 832     }
 833 }
 834
 835 JSValueRef CYFromFFI(JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, bool initialize, JSObjectRef owner) {
 836     switch (type->primitive) {
 837         case sig::boolean_P:
 838             return CYCastJSValue(context, *reinterpret_cast<bool *>(data));
 839
 840 #define CYFromFFI_(primitive, native) \
 841         case sig::primitive ## _P: \
 842             return CYCastJSValue(context, *reinterpret_cast<native *>(data)); \
 843
 844         CYFromFFI_(uchar, unsigned char)
 845         CYFromFFI_(char, char)
 846         CYFromFFI_(ushort, unsigned short)
 847         CYFromFFI_(short, short)
 848         CYFromFFI_(ulong, unsigned long)
 849         CYFromFFI_(long, long)
 850         CYFromFFI_(uint, unsigned int)
 851         CYFromFFI_(int, int)
 852         CYFromFFI_(ulonglong, unsigned long long)
 853         CYFromFFI_(longlong, long long)
 854         CYFromFFI_(float, float)
 855         CYFromFFI_(double, double)
 856
 857         case sig::array_P:
 858             if (void *pointer = data)
 859                 return CYMakePointer(context, pointer, type->data.data.size, type->data.data.type, NULL, owner);
 860             else goto null;
 861
 862         case sig::pointer_P:
 863             if (void *pointer = *reinterpret_cast<void **>(data))
 864                 return CYMakePointer(context, pointer, _not(size_t), type->data.data.type, NULL, owner);
 865             else goto null;
 866
 867         case sig::string_P:
 868             if (char *utf8 = *reinterpret_cast<char **>(data))
 869                 return CYCastJSValue(context, utf8);
 870             else goto null;
 871
 872         case sig::struct_P:
 873             return CYMakeStruct(context, data, type, ffi, owner);
 874         case sig::void_P:
 875             return CYJSUndefined(context);
 876
 877         null:
 878             return CYJSNull(context);
 879         default:
 880             if (hooks_ != NULL && hooks_->FromFFI != NULL)
 881                 if (JSValueRef value = (*hooks_->FromFFI)(context, type, ffi, data, initialize, owner))
 882                     return value;
 883
 884             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 885     }
 886 }
 887
 888 static void FunctionClosure_(ffi_cif *cif, void *result, void **arguments, void *arg) {
 889     Closure_privateData *internal(reinterpret_cast<Closure_privateData *>(arg));
 890
 891     JSContextRef context(internal->context_);
 892
 893     size_t count(internal->cif_.nargs);
 894     JSValueRef values[count];
 895
 896     for (size_t index(0); index != count; ++index)
 897         values[index] = CYFromFFI(context, internal->signature_.elements[1 + index].type, internal->cif_.arg_types[index], arguments[index]);
 898
 899     JSValueRef value(CYCallAsFunction(context, internal->function_, NULL, count, values));
 900     CYPoolFFI(NULL, context, internal->signature_.elements[0].type, internal->cif_.rtype, result, value);
 901 }
 902
 903 Closure_privateData *CYMakeFunctor_(JSContextRef context, JSObjectRef function, const char *type, void (*callback)(ffi_cif *, void *, void **, void *)) {
 904     // XXX: in case of exceptions this will leak
 905     // XXX: in point of fact, this may /need/ to leak :(
 906     Closure_privateData *internal(new Closure_privateData(context, function, type));
 907
 908     ffi_closure *closure((ffi_closure *) _syscall(mmap(
 909         NULL, sizeof(ffi_closure),
 910         PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE,
 911         -1, 0
 912     )));
 913
 914     ffi_status status(ffi_prep_closure(closure, &internal->cif_, callback, internal));
 915     _assert(status == FFI_OK);
 916
 917     _syscall(mprotect(closure, sizeof(*closure), PROT_READ | PROT_EXEC));
 918
 919     internal->value_ = closure;
 920
 921     return internal;
 922 }
 923
 924 static JSObjectRef CYMakeFunctor(JSContextRef context, JSObjectRef function, const char *type) {
 925     Closure_privateData *internal(CYMakeFunctor_(context, function, type, &FunctionClosure_));
 926     JSObjectRef object(JSObjectMake(context, Functor_, internal));
 927     // XXX: see above notes about needing to leak
 928     JSValueProtect(CYGetJSContext(context), object);
 929     return object;
 930 }
 931
 932 JSObjectRef CYGetCachedObject(JSContextRef context, JSStringRef name) {
 933     return CYCastJSObject(context, CYGetProperty(context, CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s)), name));
 934 }
 935
 936 static JSObjectRef CYMakeFunctor(JSContextRef context, JSValueRef value, const char *type) {
 937     JSObjectRef Function(CYGetCachedObject(context, CYJSString("Function")));
 938
 939     JSValueRef exception(NULL);
 940     bool function(JSValueIsInstanceOfConstructor(context, value, Function, &exception));
 941     CYThrow(context, exception);
 942
 943     if (function) {
 944         JSObjectRef function(CYCastJSObject(context, value));
 945         return CYMakeFunctor(context, function, type);
 946     } else {
 947         void (*function)()(CYCastPointer<void (*)()>(context, value));
 948         return CYMakeFunctor(context, function, type);
 949     }
 950 }
 951
 952 static bool Index_(apr_pool_t *pool, JSContextRef context, Struct_privateData *internal, JSStringRef property, ssize_t &index, uint8_t *&base) {
 953     Type_privateData *typical(internal->type_);
 954     sig::Type *type(typical->type_);
 955     if (type == NULL)
 956         return false;
 957
 958     const char *name(CYPoolCString(pool, context, property));
 959     size_t length(strlen(name));
 960     double number(CYCastDouble(name, length));
 961
 962     size_t count(type->data.signature.count);
 963
 964     if (std::isnan(number)) {
 965         if (property == NULL)
 966             return false;
 967
 968         sig::Element *elements(type->data.signature.elements);
 969
 970         for (size_t local(0); local != count; ++local) {
 971             sig::Element *element(&elements[local]);
 972             if (element->name != NULL && strcmp(name, element->name) == 0) {
 973                 index = local;
 974                 goto base;
 975             }
 976         }
 977
 978         return false;
 979     } else {
 980         index = static_cast<ssize_t>(number);
 981         if (index != number || index < 0 || static_cast<size_t>(index) >= count)
 982             return false;
 983     }
 984
 985   base:
 986     ffi_type **elements(typical->GetFFI()->elements);
 987
 988     base = reinterpret_cast<uint8_t *>(internal->value_);
 989     for (ssize_t local(0); local != index; ++local)
 990         base += elements[local]->size;
 991
 992     return true;
 993 }
 994
 995 static JSValueRef Pointer_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 996     CYPool pool;
 997     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 998
 999     if (JSStringIsEqual(property, length_s))
1000         return internal->length_ == _not(size_t) ? CYJSUndefined(context) : CYCastJSValue(context, internal->length_);
1001
1002     Type_privateData *typical(internal->type_);
1003
1004     if (typical->type_ == NULL)
1005         return NULL;
1006
1007     ssize_t offset;
1008     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
1009         offset = 0;
1010     else if (!CYGetOffset(pool, context, property, offset))
1011         return NULL;
1012
1013     ffi_type *ffi(typical->GetFFI());
1014
1015     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
1016     base += ffi->size * offset;
1017
1018     JSObjectRef owner(internal->GetOwner() ?: object);
1019     return CYFromFFI(context, typical->type_, ffi, base, false, owner);
1020 } CYCatch }
1021
1022 static bool Pointer_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
1023     CYPool pool;
1024     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
1025     Type_privateData *typical(internal->type_);
1026
1027     if (typical->type_ == NULL)
1028         return NULL;
1029
1030     ssize_t offset;
1031     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
1032         offset = 0;
1033     else if (!CYGetOffset(pool, context, property, offset))
1034         return NULL;
1035
1036     ffi_type *ffi(typical->GetFFI());
1037
1038     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
1039     base += ffi->size * offset;
1040
1041     CYPoolFFI(NULL, context, typical->type_, ffi, base, value);
1042     return true;
1043 } CYCatch }
1044
1045 static JSValueRef Struct_callAsFunction_$cya(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1046     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(_this)));
1047     Type_privateData *typical(internal->type_);
1048     return CYMakePointer(context, internal->value_, _not(size_t), typical->type_, typical->ffi_, _this);
1049 }
1050
1051 static JSValueRef Struct_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1052     CYPool pool;
1053     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
1054     Type_privateData *typical(internal->type_);
1055
1056     ssize_t index;
1057     uint8_t *base;
1058
1059     if (!Index_(pool, context, internal, property, index, base))
1060         return NULL;
1061
1062     JSObjectRef owner(internal->GetOwner() ?: object);
1063
1064     return CYFromFFI(context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, false, owner);
1065 } CYCatch }
1066
1067 static bool Struct_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
1068     CYPool pool;
1069     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
1070     Type_privateData *typical(internal->type_);
1071
1072     ssize_t index;
1073     uint8_t *base;
1074
1075     if (!Index_(pool, context, internal, property, index, base))
1076         return false;
1077
1078     CYPoolFFI(NULL, context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, value);
1079     return true;
1080 } CYCatch }
1081
1082 static void Struct_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
1083     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
1084     Type_privateData *typical(internal->type_);
1085     sig::Type *type(typical->type_);
1086
1087     if (type == NULL)
1088         return;
1089
1090     size_t count(type->data.signature.count);
1091     sig::Element *elements(type->data.signature.elements);
1092
1093     char number[32];
1094
1095     for (size_t index(0); index != count; ++index) {
1096         const char *name;
1097         name = elements[index].name;
1098
1099         if (name == NULL) {
1100             sprintf(number, "%zu", index);
1101             name = number;
1102         }
1103
1104         JSPropertyNameAccumulatorAddName(names, CYJSString(name));
1105     }
1106 }
1107
1108 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 {
1109     if (setups + count != signature->count - 1)
1110         throw CYJSError(context, "incorrect number of arguments to ffi function");
1111
1112     size_t size(setups + count);
1113     void *values[size];
1114     memcpy(values, setup, sizeof(void *) * setups);
1115
1116     for (size_t index(setups); index != size; ++index) {
1117         sig::Element *element(&signature->elements[index + 1]);
1118         ffi_type *ffi(cif->arg_types[index]);
1119         // XXX: alignment?
1120         values[index] = new(pool) uint8_t[ffi->size];
1121         CYPoolFFI(pool, context, element->type, ffi, values[index], arguments[index - setups]);
1122     }
1123
1124     uint8_t value[cif->rtype->size];
1125
1126     if (hooks_ != NULL && hooks_->CallFunction != NULL)
1127         (*hooks_->CallFunction)(context, cif, function, value, values);
1128     else
1129         ffi_call(cif, function, value, values);
1130
1131     return CYFromFFI(context, signature->elements[0].type, cif->rtype, value, initialize);
1132 } CYCatch }
1133
1134 static JSValueRef Functor_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1135     CYPool pool;
1136     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
1137     return CYCallFunction(pool, context, 0, NULL, count, arguments, false, exception, &internal->signature_, &internal->cif_, internal->GetValue());
1138 }
1139
1140 static JSObjectRef CYMakeType(JSContextRef context, const char *type) {
1141     Type_privateData *internal(new Type_privateData(type));
1142     return JSObjectMake(context, Type_privateData::Class_, internal);
1143 }
1144
1145 static JSObjectRef CYMakeType(JSContextRef context, sig::Type *type) {
1146     Type_privateData *internal(new Type_privateData(type));
1147     return JSObjectMake(context, Type_privateData::Class_, internal);
1148 }
1149
1150 static void *CYCastSymbol(const char *name) {
1151     return dlsym(RTLD_DEFAULT, name);
1152 }
1153
1154 static JSValueRef All_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1155     JSObjectRef global(CYGetGlobalObject(context));
1156     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
1157     if (JSValueRef value = CYGetProperty(context, cycript, property))
1158         if (!JSValueIsUndefined(context, value))
1159             return value;
1160
1161     CYPool pool;
1162     CYUTF8String name(CYPoolUTF8String(pool, context, property));
1163
1164     if (hooks_ != NULL && hooks_->RuntimeProperty != NULL)
1165         if (JSValueRef value = (*hooks_->RuntimeProperty)(context, name))
1166             return value;
1167
1168     sqlite3_stmt *statement;
1169
1170     _sqlcall(sqlite3_prepare(Bridge_,
1171         "select "
1172             "\"bridge\".\"mode\", "
1173             "\"bridge\".\"value\" "
1174         "from \"bridge\" "
1175         "where"
1176             " \"bridge\".\"name\" = ?"
1177         " limit 1"
1178     , -1, &statement, NULL));
1179
1180     _sqlcall(sqlite3_bind_text(statement, 1, name.data, name.size, SQLITE_STATIC));
1181
1182     int mode;
1183     const char *value;
1184
1185     if (_sqlcall(sqlite3_step(statement)) == SQLITE_DONE) {
1186         mode = -1;
1187         value = NULL;
1188     } else {
1189         mode = sqlite3_column_int(statement, 0);
1190         value = sqlite3_column_pooled(pool, statement, 1);
1191     }
1192
1193     _sqlcall(sqlite3_finalize(statement));
1194
1195     switch (mode) {
1196         default:
1197             CYThrow("invalid mode from bridge table: %d", mode);
1198         case -1:
1199             return NULL;
1200
1201         case 0:
1202             return JSEvaluateScript(CYGetJSContext(context), CYJSString(value), NULL, NULL, 0, NULL);
1203
1204         case 1:
1205             if (void (*symbol)() = reinterpret_cast<void (*)()>(CYCastSymbol(name.data)))
1206                 return CYMakeFunctor(context, symbol, value);
1207             else return NULL;
1208
1209         case 2:
1210             if (void *symbol = CYCastSymbol(name.data)) {
1211                 // XXX: this is horrendously inefficient
1212                 sig::Signature signature;
1213                 sig::Parse(pool, &signature, value, &Structor_);
1214                 ffi_cif cif;
1215                 sig::sig_ffi_cif(pool, &sig::ObjectiveC, &signature, &cif);
1216                 return CYFromFFI(context, signature.elements[0].type, cif.rtype, symbol);
1217             } else return NULL;
1218
1219         // XXX: implement case 3
1220         case 4:
1221             return CYMakeType(context, value);
1222     }
1223 } CYCatch }
1224
1225 static JSObjectRef Pointer_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1226     if (count != 2)
1227         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1228
1229     CYPool pool;
1230
1231     void *value(CYCastPointer<void *>(context, arguments[0]));
1232     const char *type(CYPoolCString(pool, context, arguments[1]));
1233
1234     sig::Signature signature;
1235     sig::Parse(pool, &signature, type, &Structor_);
1236
1237     return CYMakePointer(context, value, _not(size_t), signature.elements[0].type, NULL, NULL);
1238 } CYCatch }
1239
1240 static JSObjectRef Type_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1241     if (count != 1)
1242         throw CYJSError(context, "incorrect number of arguments to Type constructor");
1243     CYPool pool;
1244     const char *type(CYPoolCString(pool, context, arguments[0]));
1245     return CYMakeType(context, type);
1246 } CYCatch }
1247
1248 static JSValueRef Type_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1249     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1250
1251     sig::Type type;
1252
1253     if (JSStringIsEqualToUTF8CString(property, "$cyi")) {
1254         type.primitive = sig::pointer_P;
1255         type.data.data.size = 0;
1256     } else {
1257         CYPool pool;
1258         size_t index(CYGetIndex(pool, context, property));
1259         if (index == _not(size_t))
1260             return NULL;
1261         type.primitive = sig::array_P;
1262         type.data.data.size = index;
1263     }
1264
1265     type.name = NULL;
1266     type.flags = 0;
1267
1268     type.data.data.type = internal->type_;
1269
1270     return CYMakeType(context, &type);
1271 } CYCatch }
1272
1273 static JSValueRef Type_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1274     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1275
1276     if (count != 1)
1277         throw CYJSError(context, "incorrect number of arguments to type cast function");
1278     sig::Type *type(internal->type_);
1279     ffi_type *ffi(internal->GetFFI());
1280     // XXX: alignment?
1281     uint8_t value[ffi->size];
1282     CYPool pool;
1283     CYPoolFFI(pool, context, type, ffi, value, arguments[0]);
1284     return CYFromFFI(context, type, ffi, value);
1285 } CYCatch }
1286
1287 static JSObjectRef Type_callAsConstructor(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1288     if (count != 0)
1289         throw CYJSError(context, "incorrect number of arguments to type cast function");
1290     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1291
1292     sig::Type *type(internal->type_);
1293     size_t length;
1294
1295     if (type->primitive != sig::array_P)
1296         length = _not(size_t);
1297     else {
1298         length = type->data.data.size;
1299         type = type->data.data.type;
1300     }
1301
1302     void *value(malloc(internal->GetFFI()->size));
1303     return CYMakePointer(context, value, length, type, NULL, NULL);
1304 } CYCatch }
1305
1306 static JSObjectRef Functor_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1307     if (count != 2)
1308         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1309     CYPool pool;
1310     const char *type(CYPoolCString(pool, context, arguments[1]));
1311     return CYMakeFunctor(context, arguments[0], type);
1312 } CYCatch }
1313
1314 static JSValueRef CYValue_callAsFunction_valueOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1315     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1316     return CYCastJSValue(context, reinterpret_cast<uintptr_t>(internal->value_));
1317 } CYCatch }
1318
1319 static JSValueRef CYValue_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1320     return CYValue_callAsFunction_valueOf(context, object, _this, count, arguments, exception);
1321 }
1322
1323 static JSValueRef CYValue_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1324     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1325     char string[32];
1326     sprintf(string, "%p", internal->value_);
1327     return CYCastJSValue(context, string);
1328 } CYCatch }
1329
1330 static JSValueRef Pointer_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1331     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(_this)));
1332     if (internal->length_ != _not(size_t)) {
1333         JSObjectRef Array(CYGetCachedObject(context, Array_s));
1334         JSObjectRef toCYON(CYCastJSObject(context, CYGetProperty(context, Array, toCYON_s)));
1335         return CYCallAsFunction(context, toCYON, _this, count, arguments);
1336     } else {
1337         char string[32];
1338         sprintf(string, "%p", internal->value_);
1339         return CYCastJSValue(context, string);
1340     }
1341 } CYCatch }
1342
1343 static JSValueRef Type_callAsFunction_toString(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1344     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1345     CYPool pool;
1346     const char *type(sig::Unparse(pool, internal->type_));
1347     return CYCastJSValue(context, CYJSString(type));
1348 } CYCatch }
1349
1350 static JSValueRef Type_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1351     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1352     CYPool pool;
1353     const char *type(sig::Unparse(pool, internal->type_));
1354     size_t size(strlen(type));
1355     char *cyon(new(pool) char[12 + size + 1]);
1356     memcpy(cyon, "new Type(\"", 10);
1357     cyon[12 + size] = '\0';
1358     cyon[12 + size - 2] = '"';
1359     cyon[12 + size - 1] = ')';
1360     memcpy(cyon + 10, type, size);
1361     return CYCastJSValue(context, CYJSString(cyon));
1362 } CYCatch }
1363
1364 static JSValueRef Type_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1365     return Type_callAsFunction_toString(context, object, _this, count, arguments, exception);
1366 }
1367
1368 static JSStaticFunction Pointer_staticFunctions[4] = {
1369     {"toCYON", &Pointer_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1370     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1371     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1372     {NULL, NULL, 0}
1373 };
1374
1375 static JSStaticFunction Struct_staticFunctions[2] = {
1376     {"$cya", &Struct_callAsFunction_$cya, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1377     {NULL, NULL, 0}
1378 };
1379
1380 static JSStaticFunction Functor_staticFunctions[4] = {
1381     {"toCYON", &CYValue_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1382     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1383     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1384     {NULL, NULL, 0}
1385 };
1386
1387 namespace cy {
1388     JSStaticFunction const * const Functor::StaticFunctions = Functor_staticFunctions;
1389 }
1390
1391 static JSStaticFunction Type_staticFunctions[4] = {
1392     {"toCYON", &Type_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1393     {"toJSON", &Type_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1394     {"toString", &Type_callAsFunction_toString, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1395     {NULL, NULL, 0}
1396 };
1397
1398 static JSObjectRef (*JSObjectMakeArray$)(JSContextRef, size_t, const JSValueRef[], JSValueRef *);
1399
1400 void CYSetArgs(int argc, const char *argv[]) {
1401     JSContextRef context(CYGetJSContext());
1402     JSValueRef args[argc];
1403     for (int i(0); i != argc; ++i)
1404         args[i] = CYCastJSValue(context, argv[i]);
1405
1406     JSObjectRef array;
1407     if (JSObjectMakeArray$ != NULL) {
1408         JSValueRef exception(NULL);
1409         array = (*JSObjectMakeArray$)(context, argc, args, &exception);
1410         CYThrow(context, exception);
1411     } else {
1412         JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array")));
1413         JSValueRef value(CYCallAsFunction(context, Array, NULL, argc, args));
1414         array = CYCastJSObject(context, value);
1415     }
1416
1417     JSObjectRef System(CYGetCachedObject(context, CYJSString("System")));
1418     CYSetProperty(context, System, CYJSString("args"), array);
1419 }
1420
1421 JSObjectRef CYGetGlobalObject(JSContextRef context) {
1422     return JSContextGetGlobalObject(context);
1423 }
1424
1425 const char *CYExecute(apr_pool_t *pool, const char *code) {
1426     JSContextRef context(CYGetJSContext());
1427     JSValueRef exception(NULL), result;
1428
1429     void *handle;
1430     if (hooks_ != NULL && hooks_->ExecuteStart != NULL)
1431         handle = (*hooks_->ExecuteStart)(context);
1432     else
1433         handle = NULL;
1434
1435     const char *json;
1436
1437     try {
1438         result = JSEvaluateScript(context, CYJSString(code), NULL, NULL, 0, &exception);
1439     } catch (const char *error) {
1440         return error;
1441     }
1442
1443     if (exception != NULL) { error:
1444         result = exception;
1445         exception = NULL;
1446     }
1447
1448     if (JSValueIsUndefined(context, result))
1449         return NULL;
1450
1451     try {
1452         json = CYPoolCCYON(pool, context, result, &exception);
1453     } catch (const char *error) {
1454         return error;
1455     }
1456
1457     if (exception != NULL)
1458         goto error;
1459
1460     CYSetProperty(context, CYGetGlobalObject(context), Result_, result);
1461
1462     if (hooks_ != NULL && hooks_->ExecuteEnd != NULL)
1463         (*hooks_->ExecuteEnd)(context, handle);
1464     return json;
1465 }
1466
1467 extern "C" void CydgetSetupContext(JSGlobalContextRef context) {
1468     CYSetupContext(context);
1469 }
1470
1471 extern "C" void CydgetPoolParse(apr_pool_t *pool, const uint16_t **data, size_t *size) {
1472     CYDriver driver("");
1473     cy::parser parser(driver);
1474
1475     CYUTF8String utf8(CYPoolUTF8String(pool, CYUTF16String(*data, *size)));
1476
1477     driver.data_ = utf8.data;
1478     driver.size_ = utf8.size;
1479
1480     if (parser.parse() != 0 || !driver.errors_.empty())
1481         return;
1482
1483     CYContext context(driver.pool_);
1484     driver.program_->Replace(context);
1485     std::ostringstream str;
1486     CYOutput out(str);
1487     out << *driver.program_;
1488     std::string code(str.str());
1489
1490     CYUTF16String utf16(CYPoolUTF16String(pool, CYUTF8String(code.c_str(), code.size())));
1491
1492     *data = utf16.data;
1493     *size = utf16.size;
1494 }
1495
1496 static apr_pool_t *Pool_;
1497
1498 static bool initialized_;
1499
1500 void CYInitialize() {
1501     if (!initialized_)
1502         initialized_ = true;
1503     else return;
1504
1505     _aprcall(apr_initialize());
1506     _aprcall(apr_pool_create(&Pool_, NULL));
1507     _sqlcall(sqlite3_open("/usr/lib/libcycript.db", &Bridge_));
1508
1509     JSObjectMakeArray$ = reinterpret_cast<JSObjectRef (*)(JSContextRef, size_t, const JSValueRef[], JSValueRef *)>(dlsym(RTLD_DEFAULT, "JSObjectMakeArray"));
1510
1511     JSClassDefinition definition;
1512
1513     definition = kJSClassDefinitionEmpty;
1514     definition.className = "All";
1515     definition.getProperty = &All_getProperty;
1516     All_ = JSClassCreate(&definition);
1517
1518     definition = kJSClassDefinitionEmpty;
1519     definition.className = "Context";
1520     definition.finalize = &CYFinalize;
1521     Context_ = JSClassCreate(&definition);
1522
1523     definition = kJSClassDefinitionEmpty;
1524     definition.className = "Functor";
1525     definition.staticFunctions = cy::Functor::StaticFunctions;
1526     definition.callAsFunction = &Functor_callAsFunction;
1527     definition.finalize = &CYFinalize;
1528     Functor_ = JSClassCreate(&definition);
1529
1530     definition = kJSClassDefinitionEmpty;
1531     definition.className = "Pointer";
1532     definition.staticFunctions = Pointer_staticFunctions;
1533     definition.getProperty = &Pointer_getProperty;
1534     definition.setProperty = &Pointer_setProperty;
1535     definition.finalize = &CYFinalize;
1536     Pointer_ = JSClassCreate(&definition);
1537
1538     definition = kJSClassDefinitionEmpty;
1539     definition.className = "Struct";
1540     definition.staticFunctions = Struct_staticFunctions;
1541     definition.getProperty = &Struct_getProperty;
1542     definition.setProperty = &Struct_setProperty;
1543     definition.getPropertyNames = &Struct_getPropertyNames;
1544     definition.finalize = &CYFinalize;
1545     Struct_ = JSClassCreate(&definition);
1546
1547     definition = kJSClassDefinitionEmpty;
1548     definition.className = "Type";
1549     definition.staticFunctions = Type_staticFunctions;
1550     definition.getProperty = &Type_getProperty;
1551     definition.callAsFunction = &Type_callAsFunction;
1552     definition.callAsConstructor = &Type_callAsConstructor;
1553     definition.finalize = &CYFinalize;
1554     Type_privateData::Class_ = JSClassCreate(&definition);
1555
1556     definition = kJSClassDefinitionEmpty;
1557     //definition.getProperty = &Global_getProperty;
1558     Global_ = JSClassCreate(&definition);
1559
1560     Array_s = JSStringCreateWithUTF8CString("Array");
1561     cy_s = JSStringCreateWithUTF8CString("$cy");
1562     length_s = JSStringCreateWithUTF8CString("length");
1563     message_s = JSStringCreateWithUTF8CString("message");
1564     name_s = JSStringCreateWithUTF8CString("name");
1565     pop_s = JSStringCreateWithUTF8CString("pop");
1566     prototype_s = JSStringCreateWithUTF8CString("prototype");
1567     push_s = JSStringCreateWithUTF8CString("push");
1568     splice_s = JSStringCreateWithUTF8CString("splice");
1569     toCYON_s = JSStringCreateWithUTF8CString("toCYON");
1570     toJSON_s = JSStringCreateWithUTF8CString("toJSON");
1571
1572     Result_ = JSStringCreateWithUTF8CString("_");
1573
1574     if (hooks_ != NULL && hooks_->Initialize != NULL)
1575         (*hooks_->Initialize)();
1576 }
1577
1578 apr_pool_t *CYGetGlobalPool() {
1579     CYInitialize();
1580     return Pool_;
1581 }
1582
1583 void CYThrow(JSContextRef context, JSValueRef value) {
1584     if (value != NULL)
1585         throw CYJSError(context, value);
1586 }
1587
1588 const char *CYJSError::PoolCString(apr_pool_t *pool) const {
1589     // XXX: this used to be CYPoolCString
1590     return CYPoolCCYON(pool, context_, value_);
1591 }
1592
1593 JSValueRef CYJSError::CastJSValue(JSContextRef context) const {
1594     // XXX: what if the context is different?
1595     return value_;
1596 }
1597
1598 void CYThrow(const char *format, ...) {
1599     va_list args;
1600     va_start(args, format);
1601     throw CYPoolError(format, args);
1602     // XXX: does this matter? :(
1603     va_end(args);
1604 }
1605
1606 const char *CYPoolError::PoolCString(apr_pool_t *pool) const {
1607     return apr_pstrdup(pool, message_);
1608 }
1609
1610 CYPoolError::CYPoolError(const char *format, ...) {
1611     va_list args;
1612     va_start(args, format);
1613     message_ = apr_pvsprintf(pool_, format, args);
1614     va_end(args);
1615 }
1616
1617 CYPoolError::CYPoolError(const char *format, va_list args) {
1618     message_ = apr_pvsprintf(pool_, format, args);
1619 }
1620
1621 JSValueRef CYCastJSError(JSContextRef context, const char *message) {
1622     JSObjectRef Error(CYGetCachedObject(context, CYJSString("Error")));
1623
1624     JSValueRef arguments[1] = {CYCastJSValue(context, message)};
1625
1626     JSValueRef exception(NULL);
1627     JSValueRef value(JSObjectCallAsConstructor(context, Error, 1, arguments, &exception));
1628     CYThrow(context, exception);
1629
1630     return value;
1631 }
1632
1633 JSValueRef CYPoolError::CastJSValue(JSContextRef context) const {
1634     return CYCastJSError(context, message_);
1635 }
1636
1637 CYJSError::CYJSError(JSContextRef context, const char *format, ...) {
1638     _assert(context != NULL);
1639
1640     CYPool pool;
1641
1642     va_list args;
1643     va_start(args, format);
1644     const char *message(apr_pvsprintf(pool, format, args));
1645     va_end(args);
1646
1647     value_ = CYCastJSError(context, message);
1648 }
1649
1650 JSGlobalContextRef CYGetJSContext(JSContextRef context) {
1651     return reinterpret_cast<Context *>(JSObjectGetPrivate(CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s))))->context_;
1652 }
1653
1654 extern "C" void CYSetupContext(JSGlobalContextRef context) {
1655     CYInitialize();
1656
1657     JSObjectRef global(CYGetGlobalObject(context));
1658
1659     JSObjectRef cy(JSObjectMake(context, Context_, new Context(context)));
1660     CYSetProperty(context, global, cy_s, cy, kJSPropertyAttributeDontEnum);
1661
1662 /* Cache Globals {{{ */
1663     JSObjectRef Array(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Array"))));
1664     CYSetProperty(context, cy, CYJSString("Array"), Array);
1665
1666     JSObjectRef Array_prototype(CYCastJSObject(context, CYGetProperty(context, Array, prototype_s)));
1667     CYSetProperty(context, cy, CYJSString("Array_prototype"), Array_prototype);
1668
1669     JSObjectRef Error(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Error"))));
1670     CYSetProperty(context, cy, CYJSString("Error"), Error);
1671
1672     JSObjectRef Function(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Function"))));
1673     CYSetProperty(context, cy, CYJSString("Function"), Function);
1674
1675     JSObjectRef Function_prototype(CYCastJSObject(context, CYGetProperty(context, Function, prototype_s)));
1676     CYSetProperty(context, cy, CYJSString("Function_prototype"), Function_prototype);
1677
1678     JSObjectRef Object(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Object"))));
1679     CYSetProperty(context, cy, CYJSString("Object"), Object);
1680
1681     JSObjectRef Object_prototype(CYCastJSObject(context, CYGetProperty(context, Object, prototype_s)));
1682     CYSetProperty(context, cy, CYJSString("Object_prototype"), Object_prototype);
1683
1684     JSObjectRef String(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("String"))));
1685     CYSetProperty(context, cy, CYJSString("String"), String);
1686 /* }}} */
1687
1688     CYSetProperty(context, Array_prototype, toCYON_s, &Array_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1689
1690     JSObjectRef cycript(JSObjectMake(context, NULL, NULL));
1691     CYSetProperty(context, global, CYJSString("Cycript"), cycript);
1692     CYSetProperty(context, cycript, CYJSString("gc"), &Cycript_gc_callAsFunction);
1693
1694     JSObjectRef Functor(JSObjectMakeConstructor(context, Functor_, &Functor_new));
1695     JSObjectSetPrototype(context, CYCastJSObject(context, CYGetProperty(context, Functor, prototype_s)), Function_prototype);
1696     CYSetProperty(context, cycript, CYJSString("Functor"), Functor);
1697
1698     CYSetProperty(context, cycript, CYJSString("Pointer"), JSObjectMakeConstructor(context, Pointer_, &Pointer_new));
1699     CYSetProperty(context, cycript, CYJSString("Type"), JSObjectMakeConstructor(context, Type_privateData::Class_, &Type_new));
1700
1701     JSObjectRef all(JSObjectMake(context, All_, NULL));
1702     CYSetProperty(context, cycript, CYJSString("all"), all);
1703
1704     JSObjectRef last(NULL), curr(global);
1705
1706     goto next; for (JSValueRef next;;) {
1707         if (JSValueIsNull(context, next))
1708             break;
1709         last = curr;
1710         curr = CYCastJSObject(context, next);
1711       next:
1712         next = JSObjectGetPrototype(context, curr);
1713     }
1714
1715     JSObjectSetPrototype(context, last, all);
1716
1717     CYSetProperty(context, global, CYJSString("$cyq"), &$cyq);
1718
1719     JSObjectRef System(JSObjectMake(context, NULL, NULL));
1720     CYSetProperty(context, cy, CYJSString("System"), Function);
1721
1722     CYSetProperty(context, global, CYJSString("system"), System);
1723     CYSetProperty(context, System, CYJSString("args"), CYJSNull(context));
1724     //CYSetProperty(context, System, CYJSString("global"), global);
1725     CYSetProperty(context, System, CYJSString("print"), &System_print);
1726
1727     if (hooks_ != NULL && hooks_->SetupContext != NULL)
1728         (*hooks_->SetupContext)(context);
1729 }
1730
1731 JSGlobalContextRef CYGetJSContext() {
1732     CYInitialize();
1733
1734     static JSGlobalContextRef context_;
1735
1736     if (context_ == NULL) {
1737         context_ = JSGlobalContextCreate(Global_);
1738         CYSetupContext(context_);
1739     }
1740
1741     return context_;
1742 }