1 // Copyright 2014 PDFium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6
7 #include "fxjs/cfxjse_value.h"
8
9 #include <math.h>
10
11 #include "fxjs/cfxjse_class.h"
12 #include "fxjs/cfxjse_context.h"
13
14 namespace {
15
ftod(float fNumber)16 double ftod(float fNumber) {
17 static_assert(sizeof(float) == 4, "float of incorrect size");
18
19 uint32_t nFloatBits = (uint32_t&)fNumber;
20 uint8_t nExponent = (uint8_t)(nFloatBits >> 23);
21 if (nExponent == 0 || nExponent == 255)
22 return fNumber;
23
24 int8_t nErrExp = nExponent - 150;
25 if (nErrExp >= 0)
26 return fNumber;
27
28 double dwError = pow(2.0, nErrExp), dwErrorHalf = dwError / 2;
29 double dNumber = fNumber, dNumberAbs = fabs(fNumber);
30 double dNumberAbsMin = dNumberAbs - dwErrorHalf,
31 dNumberAbsMax = dNumberAbs + dwErrorHalf;
32 int32_t iErrPos = 0;
33 if (floor(dNumberAbsMin) == floor(dNumberAbsMax)) {
34 dNumberAbsMin = fmod(dNumberAbsMin, 1.0);
35 dNumberAbsMax = fmod(dNumberAbsMax, 1.0);
36 int32_t iErrPosMin = 1, iErrPosMax = 38;
37 do {
38 int32_t iMid = (iErrPosMin + iErrPosMax) / 2;
39 double dPow = pow(10.0, iMid);
40 if (floor(dNumberAbsMin * dPow) == floor(dNumberAbsMax * dPow)) {
41 iErrPosMin = iMid + 1;
42 } else {
43 iErrPosMax = iMid;
44 }
45 } while (iErrPosMin < iErrPosMax);
46 iErrPos = iErrPosMax;
47 }
48 double dPow = pow(10.0, iErrPos);
49 return fNumber < 0 ? ceil(dNumber * dPow - 0.5) / dPow
50 : floor(dNumber * dPow + 0.5) / dPow;
51 }
52
53 } // namespace
54
FXJSE_ThrowMessage(const ByteStringView & utf8Message)55 void FXJSE_ThrowMessage(const ByteStringView& utf8Message) {
56 v8::Isolate* pIsolate = v8::Isolate::GetCurrent();
57 ASSERT(pIsolate);
58
59 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(pIsolate);
60 v8::Local<v8::String> hMessage = v8::String::NewFromUtf8(
61 pIsolate, utf8Message.unterminated_c_str(), v8::String::kNormalString,
62 utf8Message.GetLength());
63 v8::Local<v8::Value> hError = v8::Exception::Error(hMessage);
64 pIsolate->ThrowException(hError);
65 }
66
CFXJSE_Value(v8::Isolate * pIsolate)67 CFXJSE_Value::CFXJSE_Value(v8::Isolate* pIsolate) : m_pIsolate(pIsolate) {}
68
~CFXJSE_Value()69 CFXJSE_Value::~CFXJSE_Value() {}
70
ToHostObject(CFXJSE_Class * lpClass) const71 CFXJSE_HostObject* CFXJSE_Value::ToHostObject(CFXJSE_Class* lpClass) const {
72 ASSERT(!m_hValue.IsEmpty());
73
74 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
75 v8::Local<v8::Value> pValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
76 ASSERT(!pValue.IsEmpty());
77
78 if (!pValue->IsObject())
79 return nullptr;
80
81 return FXJSE_RetrieveObjectBinding(pValue.As<v8::Object>(), lpClass);
82 }
83
SetObject(CFXJSE_HostObject * lpObject,CFXJSE_Class * pClass)84 void CFXJSE_Value::SetObject(CFXJSE_HostObject* lpObject,
85 CFXJSE_Class* pClass) {
86 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
87 v8::Local<v8::FunctionTemplate> hClass =
88 v8::Local<v8::FunctionTemplate>::New(m_pIsolate, pClass->m_hTemplate);
89 v8::Local<v8::Object> hObject = hClass->InstanceTemplate()->NewInstance();
90 FXJSE_UpdateObjectBinding(hObject, lpObject);
91 m_hValue.Reset(m_pIsolate, hObject);
92 }
93
SetArray(const std::vector<std::unique_ptr<CFXJSE_Value>> & values)94 void CFXJSE_Value::SetArray(
95 const std::vector<std::unique_ptr<CFXJSE_Value>>& values) {
96 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
97 v8::Local<v8::Array> hArrayObject = v8::Array::New(m_pIsolate, values.size());
98 uint32_t count = 0;
99 for (auto& v : values) {
100 hArrayObject->Set(count++, v8::Local<v8::Value>::New(
101 m_pIsolate, v.get()->DirectGetValue()));
102 }
103 m_hValue.Reset(m_pIsolate, hArrayObject);
104 }
105
SetDate(double dDouble)106 void CFXJSE_Value::SetDate(double dDouble) {
107 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
108 v8::Local<v8::Value> hDate = v8::Date::New(m_pIsolate, dDouble);
109 m_hValue.Reset(m_pIsolate, hDate);
110 }
111
SetFloat(float fFloat)112 void CFXJSE_Value::SetFloat(float fFloat) {
113 CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
114 v8::Local<v8::Value> pValue = v8::Number::New(m_pIsolate, ftod(fFloat));
115 m_hValue.Reset(m_pIsolate, pValue);
116 }
117
SetObjectProperty(const ByteStringView & szPropName,CFXJSE_Value * lpPropValue)118 bool CFXJSE_Value::SetObjectProperty(const ByteStringView& szPropName,
119 CFXJSE_Value* lpPropValue) {
120 ASSERT(lpPropValue);
121 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
122 v8::Local<v8::Value> hObject =
123 v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
124 if (!hObject->IsObject())
125 return false;
126
127 v8::Local<v8::Value> hPropValue =
128 v8::Local<v8::Value>::New(m_pIsolate, lpPropValue->DirectGetValue());
129 return (bool)hObject.As<v8::Object>()->Set(
130 v8::String::NewFromUtf8(m_pIsolate, szPropName.unterminated_c_str(),
131 v8::String::kNormalString,
132 szPropName.GetLength()),
133 hPropValue);
134 }
135
GetObjectProperty(const ByteStringView & szPropName,CFXJSE_Value * lpPropValue)136 bool CFXJSE_Value::GetObjectProperty(const ByteStringView& szPropName,
137 CFXJSE_Value* lpPropValue) {
138 ASSERT(lpPropValue);
139 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
140 v8::Local<v8::Value> hObject =
141 v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
142 if (!hObject->IsObject())
143 return false;
144
145 v8::Local<v8::Value> hPropValue =
146 hObject.As<v8::Object>()->Get(v8::String::NewFromUtf8(
147 m_pIsolate, szPropName.unterminated_c_str(),
148 v8::String::kNormalString, szPropName.GetLength()));
149 lpPropValue->ForceSetValue(hPropValue);
150 return true;
151 }
152
SetObjectProperty(uint32_t uPropIdx,CFXJSE_Value * lpPropValue)153 bool CFXJSE_Value::SetObjectProperty(uint32_t uPropIdx,
154 CFXJSE_Value* lpPropValue) {
155 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
156 v8::Local<v8::Value> hObject =
157 v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
158 if (!hObject->IsObject())
159 return false;
160
161 v8::Local<v8::Value> hPropValue =
162 v8::Local<v8::Value>::New(m_pIsolate, lpPropValue->DirectGetValue());
163 return (bool)hObject.As<v8::Object>()->Set(uPropIdx, hPropValue);
164 }
165
GetObjectPropertyByIdx(uint32_t uPropIdx,CFXJSE_Value * lpPropValue)166 bool CFXJSE_Value::GetObjectPropertyByIdx(uint32_t uPropIdx,
167 CFXJSE_Value* lpPropValue) {
168 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
169 v8::Local<v8::Value> hObject =
170 v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
171 if (!hObject->IsObject())
172 return false;
173
174 v8::Local<v8::Value> hPropValue = hObject.As<v8::Object>()->Get(uPropIdx);
175 lpPropValue->ForceSetValue(hPropValue);
176 return true;
177 }
178
DeleteObjectProperty(const ByteStringView & szPropName)179 bool CFXJSE_Value::DeleteObjectProperty(const ByteStringView& szPropName) {
180 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
181 v8::Local<v8::Value> hObject =
182 v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
183 if (!hObject->IsObject())
184 return false;
185
186 hObject.As<v8::Object>()->Delete(v8::String::NewFromUtf8(
187 m_pIsolate, szPropName.unterminated_c_str(), v8::String::kNormalString,
188 szPropName.GetLength()));
189 return true;
190 }
191
HasObjectOwnProperty(const ByteStringView & szPropName,bool bUseTypeGetter)192 bool CFXJSE_Value::HasObjectOwnProperty(const ByteStringView& szPropName,
193 bool bUseTypeGetter) {
194 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
195 v8::Local<v8::Value> hObject =
196 v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
197 if (!hObject->IsObject())
198 return false;
199
200 v8::Local<v8::String> hKey = v8::String::NewFromUtf8(
201 m_pIsolate, szPropName.unterminated_c_str(), v8::String::kNormalString,
202 szPropName.GetLength());
203 return hObject.As<v8::Object>()->HasRealNamedProperty(hKey) ||
204 (bUseTypeGetter &&
205 hObject.As<v8::Object>()
206 ->HasOwnProperty(m_pIsolate->GetCurrentContext(), hKey)
207 .FromMaybe(false));
208 }
209
SetObjectOwnProperty(const ByteStringView & szPropName,CFXJSE_Value * lpPropValue)210 bool CFXJSE_Value::SetObjectOwnProperty(const ByteStringView& szPropName,
211 CFXJSE_Value* lpPropValue) {
212 ASSERT(lpPropValue);
213 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
214 v8::Local<v8::Value> hObject =
215 v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
216 if (!hObject->IsObject())
217 return false;
218
219 v8::Local<v8::Value> pValue =
220 v8::Local<v8::Value>::New(m_pIsolate, lpPropValue->m_hValue);
221 return hObject.As<v8::Object>()
222 ->DefineOwnProperty(
223 m_pIsolate->GetCurrentContext(),
224 v8::String::NewFromUtf8(m_pIsolate, szPropName.unterminated_c_str(),
225 v8::String::kNormalString,
226 szPropName.GetLength()),
227 pValue)
228 .FromMaybe(false);
229 }
230
SetFunctionBind(CFXJSE_Value * lpOldFunction,CFXJSE_Value * lpNewThis)231 bool CFXJSE_Value::SetFunctionBind(CFXJSE_Value* lpOldFunction,
232 CFXJSE_Value* lpNewThis) {
233 ASSERT(lpOldFunction && lpNewThis);
234
235 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
236 v8::Local<v8::Value> rgArgs[2];
237 v8::Local<v8::Value> hOldFunction =
238 v8::Local<v8::Value>::New(m_pIsolate, lpOldFunction->DirectGetValue());
239 if (hOldFunction.IsEmpty() || !hOldFunction->IsFunction())
240 return false;
241
242 rgArgs[0] = hOldFunction;
243 v8::Local<v8::Value> hNewThis =
244 v8::Local<v8::Value>::New(m_pIsolate, lpNewThis->DirectGetValue());
245 if (hNewThis.IsEmpty())
246 return false;
247
248 rgArgs[1] = hNewThis;
249 v8::Local<v8::String> hBinderFuncSource =
250 v8::String::NewFromUtf8(m_pIsolate,
251 "(function (oldfunction, newthis) { return "
252 "oldfunction.bind(newthis); })");
253 v8::Local<v8::Function> hBinderFunc =
254 v8::Script::Compile(hBinderFuncSource)->Run().As<v8::Function>();
255 v8::Local<v8::Value> hBoundFunction =
256 hBinderFunc->Call(m_pIsolate->GetCurrentContext()->Global(), 2, rgArgs);
257 if (hBoundFunction.IsEmpty() || !hBoundFunction->IsFunction())
258 return false;
259
260 m_hValue.Reset(m_pIsolate, hBoundFunction);
261 return true;
262 }
263
IsUndefined() const264 bool CFXJSE_Value::IsUndefined() const {
265 if (m_hValue.IsEmpty())
266 return false;
267
268 CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
269 v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
270 return hValue->IsUndefined();
271 }
272
IsNull() const273 bool CFXJSE_Value::IsNull() const {
274 if (m_hValue.IsEmpty())
275 return false;
276
277 CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
278 v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
279 return hValue->IsNull();
280 }
281
IsBoolean() const282 bool CFXJSE_Value::IsBoolean() const {
283 if (m_hValue.IsEmpty())
284 return false;
285
286 CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
287 v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
288 return hValue->IsBoolean();
289 }
290
IsString() const291 bool CFXJSE_Value::IsString() const {
292 if (m_hValue.IsEmpty())
293 return false;
294
295 CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
296 v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
297 return hValue->IsString();
298 }
299
IsNumber() const300 bool CFXJSE_Value::IsNumber() const {
301 if (m_hValue.IsEmpty())
302 return false;
303
304 CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
305 v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
306 return hValue->IsNumber();
307 }
308
IsInteger() const309 bool CFXJSE_Value::IsInteger() const {
310 if (m_hValue.IsEmpty())
311 return false;
312
313 CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
314 v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
315 return hValue->IsInt32();
316 }
317
IsObject() const318 bool CFXJSE_Value::IsObject() const {
319 if (m_hValue.IsEmpty())
320 return false;
321
322 CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
323 v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
324 return hValue->IsObject();
325 }
326
IsArray() const327 bool CFXJSE_Value::IsArray() const {
328 if (m_hValue.IsEmpty())
329 return false;
330
331 CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
332 v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
333 return hValue->IsArray();
334 }
335
IsFunction() const336 bool CFXJSE_Value::IsFunction() const {
337 if (m_hValue.IsEmpty())
338 return false;
339
340 CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
341 v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
342 return hValue->IsFunction();
343 }
344
IsDate() const345 bool CFXJSE_Value::IsDate() const {
346 if (m_hValue.IsEmpty())
347 return false;
348
349 CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
350 v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
351 return hValue->IsDate();
352 }
353
ToBoolean() const354 bool CFXJSE_Value::ToBoolean() const {
355 ASSERT(!m_hValue.IsEmpty());
356 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
357 v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
358 return static_cast<bool>(hValue->BooleanValue());
359 }
360
ToFloat() const361 float CFXJSE_Value::ToFloat() const {
362 ASSERT(!m_hValue.IsEmpty());
363 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
364 v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
365 return static_cast<float>(hValue->NumberValue());
366 }
367
ToDouble() const368 double CFXJSE_Value::ToDouble() const {
369 ASSERT(!m_hValue.IsEmpty());
370 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
371 v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
372 return static_cast<double>(hValue->NumberValue());
373 }
374
ToInteger() const375 int32_t CFXJSE_Value::ToInteger() const {
376 ASSERT(!m_hValue.IsEmpty());
377 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
378 v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
379 return static_cast<int32_t>(hValue->NumberValue());
380 }
381
ToString() const382 ByteString CFXJSE_Value::ToString() const {
383 ASSERT(!m_hValue.IsEmpty());
384 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
385 v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
386 v8::Local<v8::String> hString = hValue->ToString();
387 v8::String::Utf8Value hStringVal(m_pIsolate, hString);
388 return ByteString(*hStringVal);
389 }
390
SetUndefined()391 void CFXJSE_Value::SetUndefined() {
392 CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
393 v8::Local<v8::Value> hValue = v8::Undefined(m_pIsolate);
394 m_hValue.Reset(m_pIsolate, hValue);
395 }
396
SetNull()397 void CFXJSE_Value::SetNull() {
398 CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
399 v8::Local<v8::Value> hValue = v8::Null(m_pIsolate);
400 m_hValue.Reset(m_pIsolate, hValue);
401 }
402
SetBoolean(bool bBoolean)403 void CFXJSE_Value::SetBoolean(bool bBoolean) {
404 CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
405 v8::Local<v8::Value> hValue = v8::Boolean::New(m_pIsolate, bBoolean != false);
406 m_hValue.Reset(m_pIsolate, hValue);
407 }
408
SetInteger(int32_t nInteger)409 void CFXJSE_Value::SetInteger(int32_t nInteger) {
410 CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
411 v8::Local<v8::Value> hValue = v8::Integer::New(m_pIsolate, nInteger);
412 m_hValue.Reset(m_pIsolate, hValue);
413 }
414
SetDouble(double dDouble)415 void CFXJSE_Value::SetDouble(double dDouble) {
416 CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
417 v8::Local<v8::Value> hValue = v8::Number::New(m_pIsolate, dDouble);
418 m_hValue.Reset(m_pIsolate, hValue);
419 }
420
SetString(const ByteStringView & szString)421 void CFXJSE_Value::SetString(const ByteStringView& szString) {
422 CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
423 v8::Local<v8::Value> hValue = v8::String::NewFromUtf8(
424 m_pIsolate, reinterpret_cast<const char*>(szString.raw_str()),
425 v8::String::kNormalString, szString.GetLength());
426 m_hValue.Reset(m_pIsolate, hValue);
427 }
428
429