summaryrefslogtreecommitdiff
path: root/fpdfsdk/src/javascript/global.cpp
blob: 32995ffbb119bd3b44ffeedf97e4e073569b5224 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com

#include "fpdfsdk/src/javascript/global.h"

#include "core/include/fxcrt/fx_ext.h"
#include "fpdfsdk/include/javascript/IJavaScript.h"
#include "fpdfsdk/src/javascript/JS_Context.h"
#include "fpdfsdk/src/javascript/JS_Define.h"
#include "fpdfsdk/src/javascript/JS_EventHandler.h"
#include "fpdfsdk/src/javascript/JS_GlobalData.h"
#include "fpdfsdk/src/javascript/JS_Object.h"
#include "fpdfsdk/src/javascript/JS_Value.h"
#include "fpdfsdk/src/javascript/resource.h"

/* ---------------------------- global ---------------------------- */

// Helper class for compile-time calculation of hash values in order to
// avoid having global object initializers.
template <unsigned ACC, wchar_t... Ns>
struct CHash;

// Only needed to hash single-character strings.
template <wchar_t N>
struct CHash<N> {
  static const unsigned value = N;
};

template <unsigned ACC, wchar_t N>
struct CHash<ACC, N> {
  static const unsigned value = (ACC * 1313LLU + N) & 0xFFFFFFFF;
};

template <unsigned ACC, wchar_t N, wchar_t... Ns>
struct CHash<ACC, N, Ns...> {
  static const unsigned value = CHash<CHash<ACC, N>::value, Ns...>::value;
};

const unsigned int JSCONST_nStringHash =
    CHash<'s', 't', 'r', 'i', 'n', 'g'>::value;
const unsigned int JSCONST_nNumberHash =
    CHash<'n', 'u', 'm', 'b', 'e', 'r'>::value;
const unsigned int JSCONST_nBoolHash =
    CHash<'b', 'o', 'o', 'l', 'e', 'a', 'n'>::value;
const unsigned int JSCONST_nDateHash = CHash<'d', 'a', 't', 'e'>::value;
const unsigned int JSCONST_nObjectHash =
    CHash<'o', 'b', 'j', 'e', 'c', 't'>::value;
const unsigned int JSCONST_nFXobjHash = CHash<'f', 'x', 'o', 'b', 'j'>::value;
const unsigned int JSCONST_nNullHash = CHash<'n', 'u', 'l', 'l'>::value;
const unsigned int JSCONST_nUndefHash =
    CHash<'u', 'n', 'd', 'e', 'f', 'i', 'n', 'e', 'd'>::value;

static unsigned JS_CalcHash(const wchar_t* main) {
  return (unsigned)FX_HashCode_String_GetW(main, FXSYS_wcslen(main));
}

#ifdef _DEBUG
class HashVerify {
 public:
  HashVerify();
} g_hashVerify;

HashVerify::HashVerify() {
  ASSERT(JSCONST_nStringHash == JS_CalcHash(kFXJSValueNameString));
  ASSERT(JSCONST_nNumberHash == JS_CalcHash(kFXJSValueNameNumber));
  ASSERT(JSCONST_nBoolHash == JS_CalcHash(kFXJSValueNameBoolean));
  ASSERT(JSCONST_nDateHash == JS_CalcHash(kFXJSValueNameDate));
  ASSERT(JSCONST_nObjectHash == JS_CalcHash(kFXJSValueNameObject));
  ASSERT(JSCONST_nFXobjHash == JS_CalcHash(kFXJSValueNameFxobj));
  ASSERT(JSCONST_nNullHash == JS_CalcHash(kFXJSValueNameNull));
  ASSERT(JSCONST_nUndefHash == JS_CalcHash(kFXJSValueNameUndefined));
}
#endif

BEGIN_JS_STATIC_CONST(CJS_Global)
END_JS_STATIC_CONST()

BEGIN_JS_STATIC_PROP(CJS_Global)
END_JS_STATIC_PROP()

BEGIN_JS_STATIC_METHOD(CJS_Global)
JS_STATIC_METHOD_ENTRY(setPersistent)
END_JS_STATIC_METHOD()

IMPLEMENT_SPECIAL_JS_CLASS(CJS_Global, JSGlobalAlternate, global);

void CJS_Global::InitInstance(IJS_Runtime* pIRuntime) {
  CJS_Runtime* pRuntime = static_cast<CJS_Runtime*>(pIRuntime);
  JSGlobalAlternate* pGlobal =
      static_cast<JSGlobalAlternate*>(GetEmbedObject());
  pGlobal->Initial(pRuntime->GetReaderApp());
}

JSGlobalAlternate::JSGlobalAlternate(CJS_Object* pJSObject)
    : CJS_EmbedObj(pJSObject), m_pApp(NULL) {
}

JSGlobalAlternate::~JSGlobalAlternate() {
  DestroyGlobalPersisitentVariables();
  m_pGlobalData->Release();
}

void JSGlobalAlternate::Initial(CPDFDoc_Environment* pApp) {
  m_pApp = pApp;
  m_pGlobalData = CJS_GlobalData::GetRetainedInstance(pApp);
  UpdateGlobalPersistentVariables();
}

FX_BOOL JSGlobalAlternate::QueryProperty(const FX_WCHAR* propname) {
  return CFX_WideString(propname) != L"setPersistent";
}

FX_BOOL JSGlobalAlternate::DelProperty(IJS_Context* cc,
                                       const FX_WCHAR* propname,
                                       CFX_WideString& sError) {
  auto it = m_mapGlobal.find(CFX_ByteString::FromUnicode(propname));
  if (it == m_mapGlobal.end())
    return FALSE;

  it->second->bDeleted = TRUE;
  return TRUE;
}

FX_BOOL JSGlobalAlternate::DoProperty(IJS_Context* cc,
                                      const FX_WCHAR* propname,
                                      CJS_PropValue& vp,
                                      CFX_WideString& sError) {
  if (vp.IsSetting()) {
    CFX_ByteString sPropName = CFX_ByteString::FromUnicode(propname);
    switch (vp.GetType()) {
      case CJS_Value::VT_number: {
        double dData;
        vp >> dData;
        return SetGlobalVariables(sPropName, JS_GLOBALDATA_TYPE_NUMBER, dData,
                                  false, "", v8::Local<v8::Object>(), FALSE);
      }
      case CJS_Value::VT_boolean: {
        bool bData;
        vp >> bData;
        return SetGlobalVariables(sPropName, JS_GLOBALDATA_TYPE_BOOLEAN, 0,
                                  bData, "", v8::Local<v8::Object>(), FALSE);
      }
      case CJS_Value::VT_string: {
        CFX_ByteString sData;
        vp >> sData;
        return SetGlobalVariables(sPropName, JS_GLOBALDATA_TYPE_STRING, 0,
                                  false, sData, v8::Local<v8::Object>(), FALSE);
      }
      case CJS_Value::VT_object: {
        v8::Local<v8::Object> pData;
        vp >> pData;
        return SetGlobalVariables(sPropName, JS_GLOBALDATA_TYPE_OBJECT, 0,
                                  false, "", pData, FALSE);
      }
      case CJS_Value::VT_null: {
        return SetGlobalVariables(sPropName, JS_GLOBALDATA_TYPE_NULL, 0, false,
                                  "", v8::Local<v8::Object>(), FALSE);
      }
      case CJS_Value::VT_undefined: {
        DelProperty(cc, propname, sError);
        return TRUE;
      }
      default:
        break;
    }
  } else {
    auto it = m_mapGlobal.find(CFX_ByteString::FromUnicode(propname));
    if (it == m_mapGlobal.end()) {
      vp.SetNull();
      return TRUE;
    }
    JSGlobalData* pData = it->second;
    if (pData->bDeleted) {
      vp.SetNull();
      return TRUE;
    }
    switch (pData->nType) {
      case JS_GLOBALDATA_TYPE_NUMBER:
        vp << pData->dData;
        return TRUE;
      case JS_GLOBALDATA_TYPE_BOOLEAN:
        vp << pData->bData;
        return TRUE;
      case JS_GLOBALDATA_TYPE_STRING:
        vp << pData->sData;
        return TRUE;
      case JS_GLOBALDATA_TYPE_OBJECT: {
        v8::Local<v8::Object> obj = v8::Local<v8::Object>::New(
            vp.GetJSRuntime()->GetIsolate(), pData->pData);
        vp << obj;
        return TRUE;
      }
      case JS_GLOBALDATA_TYPE_NULL:
        vp.SetNull();
        return TRUE;
      default:
        break;
    }
  }
  return FALSE;
}

FX_BOOL JSGlobalAlternate::setPersistent(IJS_Context* cc,
                                         const std::vector<CJS_Value>& params,
                                         CJS_Value& vRet,
                                         CFX_WideString& sError) {
  CJS_Context* pContext = static_cast<CJS_Context*>(cc);
  if (params.size() != 2) {
    sError = JSGetStringFromID(pContext, IDS_STRING_JSPARAMERROR);
    return FALSE;
  }

  auto it = m_mapGlobal.find(params[0].ToCFXByteString());
  if (it != m_mapGlobal.end()) {
    JSGlobalData* pData = it->second;
    if (!pData->bDeleted) {
      pData->bPersistent = params[1].ToBool();
      return TRUE;
    }
  }

  sError = JSGetStringFromID(pContext, IDS_STRING_JSNOGLOBAL);
  return FALSE;
}

void JSGlobalAlternate::UpdateGlobalPersistentVariables() {
  for (int i = 0, sz = m_pGlobalData->GetSize(); i < sz; i++) {
    CJS_GlobalData_Element* pData = m_pGlobalData->GetAt(i);
    switch (pData->data.nType) {
      case JS_GLOBALDATA_TYPE_NUMBER:
        SetGlobalVariables(pData->data.sKey, JS_GLOBALDATA_TYPE_NUMBER,
                           pData->data.dData, false, "",
                           v8::Local<v8::Object>(), pData->bPersistent == 1);
        FXJS_PutObjectNumber(NULL, m_pJSObject->ToV8Object(),
                             pData->data.sKey.UTF8Decode().c_str(),
                             pData->data.dData);
        break;
      case JS_GLOBALDATA_TYPE_BOOLEAN:
        SetGlobalVariables(pData->data.sKey, JS_GLOBALDATA_TYPE_BOOLEAN, 0,
                           (bool)(pData->data.bData == 1), "",
                           v8::Local<v8::Object>(), pData->bPersistent == 1);
        FXJS_PutObjectBoolean(NULL, m_pJSObject->ToV8Object(),
                              pData->data.sKey.UTF8Decode().c_str(),
                              (bool)(pData->data.bData == 1));
        break;
      case JS_GLOBALDATA_TYPE_STRING:
        SetGlobalVariables(pData->data.sKey, JS_GLOBALDATA_TYPE_STRING, 0,
                           false, pData->data.sData, v8::Local<v8::Object>(),
                           pData->bPersistent == 1);
        FXJS_PutObjectString(NULL, m_pJSObject->ToV8Object(),
                             pData->data.sKey.UTF8Decode().c_str(),
                             pData->data.sData.UTF8Decode().c_str());
        break;
      case JS_GLOBALDATA_TYPE_OBJECT: {
        v8::Isolate* pRuntime = m_pJSObject->ToV8Object()->GetIsolate();
        v8::Local<v8::Object> pObj = FXJS_NewFxDynamicObj(pRuntime, NULL, -1);

        PutObjectProperty(pObj, &pData->data);

        SetGlobalVariables(pData->data.sKey, JS_GLOBALDATA_TYPE_OBJECT, 0,
                           false, "", pObj, pData->bPersistent == 1);
        FXJS_PutObjectObject(NULL, m_pJSObject->ToV8Object(),
                             pData->data.sKey.UTF8Decode().c_str(), pObj);

      } break;
      case JS_GLOBALDATA_TYPE_NULL:
        SetGlobalVariables(pData->data.sKey, JS_GLOBALDATA_TYPE_NULL, 0, false,
                           "", v8::Local<v8::Object>(),
                           pData->bPersistent == 1);
        FXJS_PutObjectNull(NULL, m_pJSObject->ToV8Object(),
                           pData->data.sKey.UTF8Decode().c_str());
        break;
    }
  }
}

void JSGlobalAlternate::CommitGlobalPersisitentVariables(IJS_Context* cc) {
  for (auto it = m_mapGlobal.begin(); it != m_mapGlobal.end(); ++it) {
    CFX_ByteString name = it->first;
    JSGlobalData* pData = it->second;
    if (pData->bDeleted) {
      m_pGlobalData->DeleteGlobalVariable(name);
    } else {
      switch (pData->nType) {
        case JS_GLOBALDATA_TYPE_NUMBER:
          m_pGlobalData->SetGlobalVariableNumber(name, pData->dData);
          m_pGlobalData->SetGlobalVariablePersistent(name, pData->bPersistent);
          break;
        case JS_GLOBALDATA_TYPE_BOOLEAN:
          m_pGlobalData->SetGlobalVariableBoolean(name, pData->bData);
          m_pGlobalData->SetGlobalVariablePersistent(name, pData->bPersistent);
          break;
        case JS_GLOBALDATA_TYPE_STRING:
          m_pGlobalData->SetGlobalVariableString(name, pData->sData);
          m_pGlobalData->SetGlobalVariablePersistent(name, pData->bPersistent);
          break;
        case JS_GLOBALDATA_TYPE_OBJECT:
          {
            CJS_GlobalVariableArray array;
            v8::Local<v8::Object> obj = v8::Local<v8::Object>::New(
                GetJSObject()->GetIsolate(), pData->pData);
            ObjectToArray(cc, obj, array);
            m_pGlobalData->SetGlobalVariableObject(name, array);
            m_pGlobalData->SetGlobalVariablePersistent(name,
                                                       pData->bPersistent);
          }
          break;
        case JS_GLOBALDATA_TYPE_NULL:
          m_pGlobalData->SetGlobalVariableNull(name);
          m_pGlobalData->SetGlobalVariablePersistent(name, pData->bPersistent);
          break;
      }
    }
  }
}

void JSGlobalAlternate::ObjectToArray(IJS_Context* cc,
                                      v8::Local<v8::Object> pObj,
                                      CJS_GlobalVariableArray& array) {
  v8::Isolate* isolate = pObj->GetIsolate();
  CJS_Runtime* pRuntime = CJS_Runtime::FromContext(cc);

  v8::Local<v8::Array> pKeyList = FXJS_GetObjectElementNames(isolate, pObj);
  int nObjElements = pKeyList->Length();
  for (int i = 0; i < nObjElements; i++) {
    CFX_WideString ws =
        FXJS_ToString(isolate, FXJS_GetArrayElement(isolate, pKeyList, i));
    CFX_ByteString sKey = ws.UTF8Encode();

    v8::Local<v8::Value> v = FXJS_GetObjectElement(isolate, pObj, ws.c_str());
    switch (GET_VALUE_TYPE(v)) {
      case CJS_Value::VT_number: {
        CJS_KeyValue* pObjElement = new CJS_KeyValue;
        pObjElement->nType = JS_GLOBALDATA_TYPE_NUMBER;
        pObjElement->sKey = sKey;
        pObjElement->dData = FXJS_ToNumber(isolate, v);
        array.Add(pObjElement);
      } break;
      case CJS_Value::VT_boolean: {
        CJS_KeyValue* pObjElement = new CJS_KeyValue;
        pObjElement->nType = JS_GLOBALDATA_TYPE_BOOLEAN;
        pObjElement->sKey = sKey;
        pObjElement->dData = FXJS_ToBoolean(isolate, v);
        array.Add(pObjElement);
      } break;
      case CJS_Value::VT_string: {
        CFX_ByteString sValue =
            CJS_Value(pRuntime, v, CJS_Value::VT_string).ToCFXByteString();
        CJS_KeyValue* pObjElement = new CJS_KeyValue;
        pObjElement->nType = JS_GLOBALDATA_TYPE_STRING;
        pObjElement->sKey = sKey;
        pObjElement->sData = sValue;
        array.Add(pObjElement);
      } break;
      case CJS_Value::VT_object: {
        CJS_KeyValue* pObjElement = new CJS_KeyValue;
        pObjElement->nType = JS_GLOBALDATA_TYPE_OBJECT;
        pObjElement->sKey = sKey;
        ObjectToArray(cc, FXJS_ToObject(isolate, v), pObjElement->objData);
        array.Add(pObjElement);
      } break;
      case CJS_Value::VT_null: {
        CJS_KeyValue* pObjElement = new CJS_KeyValue;
        pObjElement->nType = JS_GLOBALDATA_TYPE_NULL;
        pObjElement->sKey = sKey;
        array.Add(pObjElement);
      } break;
      default:
        break;
    }
  }
}

void JSGlobalAlternate::PutObjectProperty(v8::Local<v8::Object> pObj,
                                          CJS_KeyValue* pData) {
  for (int i = 0, sz = pData->objData.Count(); i < sz; i++) {
    CJS_KeyValue* pObjData = pData->objData.GetAt(i);
    switch (pObjData->nType) {
      case JS_GLOBALDATA_TYPE_NUMBER:
        FXJS_PutObjectNumber(NULL, pObj, pObjData->sKey.UTF8Decode().c_str(),
                             pObjData->dData);
        break;
      case JS_GLOBALDATA_TYPE_BOOLEAN:
        FXJS_PutObjectBoolean(NULL, pObj, pObjData->sKey.UTF8Decode().c_str(),
                              pObjData->bData == 1);
        break;
      case JS_GLOBALDATA_TYPE_STRING:
        FXJS_PutObjectString(NULL, pObj, pObjData->sKey.UTF8Decode().c_str(),
                             pObjData->sData.UTF8Decode().c_str());
        break;
      case JS_GLOBALDATA_TYPE_OBJECT: {
        v8::Isolate* pRuntime = m_pJSObject->ToV8Object()->GetIsolate();
        v8::Local<v8::Object> pNewObj =
            FXJS_NewFxDynamicObj(pRuntime, NULL, -1);
        PutObjectProperty(pNewObj, pObjData);
        FXJS_PutObjectObject(NULL, pObj, pObjData->sKey.UTF8Decode().c_str(),
                             pNewObj);
      } break;
      case JS_GLOBALDATA_TYPE_NULL:
        FXJS_PutObjectNull(NULL, pObj, pObjData->sKey.UTF8Decode().c_str());
        break;
    }
  }
}

void JSGlobalAlternate::DestroyGlobalPersisitentVariables() {
  for (const auto& pair : m_mapGlobal) {
    delete pair.second;
  }
  m_mapGlobal.clear();
}

FX_BOOL JSGlobalAlternate::SetGlobalVariables(const FX_CHAR* propname,
                                              int nType,
                                              double dData,
                                              bool bData,
                                              const CFX_ByteString& sData,
                                              v8::Local<v8::Object> pData,
                                              bool bDefaultPersistent) {
  if (!propname)
    return FALSE;

  auto it = m_mapGlobal.find(propname);
  if (it != m_mapGlobal.end()) {
    JSGlobalData* pTemp = it->second;
    if (pTemp->bDeleted || pTemp->nType != nType) {
      pTemp->dData = 0;
      pTemp->bData = 0;
      pTemp->sData = "";
      pTemp->nType = nType;
    }

    pTemp->bDeleted = FALSE;
    switch (nType) {
      case JS_GLOBALDATA_TYPE_NUMBER: {
        pTemp->dData = dData;
      } break;
      case JS_GLOBALDATA_TYPE_BOOLEAN: {
        pTemp->bData = bData;
      } break;
      case JS_GLOBALDATA_TYPE_STRING: {
        pTemp->sData = sData;
      } break;
      case JS_GLOBALDATA_TYPE_OBJECT: {
        pTemp->pData.Reset(pData->GetIsolate(), pData);
      } break;
      case JS_GLOBALDATA_TYPE_NULL:
        break;
      default:
        return FALSE;
    }
    return TRUE;
  }

  JSGlobalData* pNewData = NULL;

  switch (nType) {
    case JS_GLOBALDATA_TYPE_NUMBER: {
      pNewData = new JSGlobalData;
      pNewData->nType = JS_GLOBALDATA_TYPE_NUMBER;
      pNewData->dData = dData;
      pNewData->bPersistent = bDefaultPersistent;
    } break;
    case JS_GLOBALDATA_TYPE_BOOLEAN: {
      pNewData = new JSGlobalData;
      pNewData->nType = JS_GLOBALDATA_TYPE_BOOLEAN;
      pNewData->bData = bData;
      pNewData->bPersistent = bDefaultPersistent;
    } break;
    case JS_GLOBALDATA_TYPE_STRING: {
      pNewData = new JSGlobalData;
      pNewData->nType = JS_GLOBALDATA_TYPE_STRING;
      pNewData->sData = sData;
      pNewData->bPersistent = bDefaultPersistent;
    } break;
    case JS_GLOBALDATA_TYPE_OBJECT: {
      pNewData = new JSGlobalData;
      pNewData->nType = JS_GLOBALDATA_TYPE_OBJECT;
      pNewData->pData.Reset(pData->GetIsolate(), pData);
      pNewData->bPersistent = bDefaultPersistent;
    } break;
    case JS_GLOBALDATA_TYPE_NULL: {
      pNewData = new JSGlobalData;
      pNewData->nType = JS_GLOBALDATA_TYPE_NULL;
      pNewData->bPersistent = bDefaultPersistent;
    } break;
    default:
      return FALSE;
  }

  m_mapGlobal[propname] = pNewData;
  return TRUE;
}

CJS_Value::Type GET_VALUE_TYPE(v8::Local<v8::Value> p) {
  const unsigned int nHash = JS_CalcHash(FXJS_GetTypeof(p));

  if (nHash == JSCONST_nUndefHash)
    return CJS_Value::VT_undefined;
  if (nHash == JSCONST_nNullHash)
    return CJS_Value::VT_null;
  if (nHash == JSCONST_nStringHash)
    return CJS_Value::VT_string;
  if (nHash == JSCONST_nNumberHash)
    return CJS_Value::VT_number;
  if (nHash == JSCONST_nBoolHash)
    return CJS_Value::VT_boolean;
  if (nHash == JSCONST_nDateHash)
    return CJS_Value::VT_date;
  if (nHash == JSCONST_nObjectHash)
    return CJS_Value::VT_object;
  if (nHash == JSCONST_nFXobjHash)
    return CJS_Value::VT_fxobject;

  return CJS_Value::VT_unknown;
}