// Copyright 2014 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#include "fxjs/include/cfxjse_value.h"
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#include <math.h>
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#include "fxjs/include/cfxjse_class.h"
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#include "fxjs/include/cfxjse_context.h"
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namespace {
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double ftod(FX_FLOAT fNumber) {
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static_assert(sizeof(FX_FLOAT) == 4, "FX_FLOAT of incorrect size");
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uint32_t nFloatBits = (uint32_t&)fNumber;
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uint8_t nExponent = (uint8_t)(nFloatBits >> 23);
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if (nExponent == 0 || nExponent == 255)
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return fNumber;
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int8_t nErrExp = nExponent - 150;
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if (nErrExp >= 0)
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return fNumber;
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double dwError = pow(2.0, nErrExp), dwErrorHalf = dwError / 2;
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double dNumber = fNumber, dNumberAbs = fabs(fNumber);
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double dNumberAbsMin = dNumberAbs - dwErrorHalf,
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dNumberAbsMax = dNumberAbs + dwErrorHalf;
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int32_t iErrPos = 0;
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if (floor(dNumberAbsMin) == floor(dNumberAbsMax)) {
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dNumberAbsMin = fmod(dNumberAbsMin, 1.0);
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dNumberAbsMax = fmod(dNumberAbsMax, 1.0);
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int32_t iErrPosMin = 1, iErrPosMax = 38;
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do {
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int32_t iMid = (iErrPosMin + iErrPosMax) / 2;
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double dPow = pow(10.0, iMid);
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if (floor(dNumberAbsMin * dPow) == floor(dNumberAbsMax * dPow)) {
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iErrPosMin = iMid + 1;
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} else {
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iErrPosMax = iMid;
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}
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} while (iErrPosMin < iErrPosMax);
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iErrPos = iErrPosMax;
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}
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double dPow = pow(10.0, iErrPos);
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return fNumber < 0 ? ceil(dNumber * dPow - 0.5) / dPow
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: floor(dNumber * dPow + 0.5) / dPow;
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}
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} // namespace
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void FXJSE_ThrowMessage(const CFX_ByteStringC& utf8Message) {
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v8::Isolate* pIsolate = v8::Isolate::GetCurrent();
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ASSERT(pIsolate);
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CFXJSE_ScopeUtil_IsolateHandleRootContext scope(pIsolate);
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v8::Local<v8::String> hMessage = v8::String::NewFromUtf8(
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pIsolate, utf8Message.c_str(), v8::String::kNormalString,
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utf8Message.GetLength());
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v8::Local<v8::Value> hError = v8::Exception::Error(hMessage);
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pIsolate->ThrowException(hError);
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}
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CFXJSE_Value::CFXJSE_Value(v8::Isolate* pIsolate) : m_pIsolate(pIsolate) {}
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CFXJSE_Value::~CFXJSE_Value() {}
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CFXJSE_HostObject* CFXJSE_Value::ToHostObject(CFXJSE_Class* lpClass) const {
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ASSERT(!m_hValue.IsEmpty());
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CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
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v8::Local<v8::Value> pValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
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ASSERT(!pValue.IsEmpty());
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if (!pValue->IsObject())
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return nullptr;
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return FXJSE_RetrieveObjectBinding(pValue.As<v8::Object>(), lpClass);
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}
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void CFXJSE_Value::SetObject(CFXJSE_HostObject* lpObject,
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CFXJSE_Class* pClass) {
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if (!pClass) {
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ASSERT(!lpObject);
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SetJSObject();
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return;
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}
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SetHostObject(lpObject, pClass);
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}
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void CFXJSE_Value::SetHostObject(CFXJSE_HostObject* lpObject,
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CFXJSE_Class* lpClass) {
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CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
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ASSERT(lpClass);
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v8::Local<v8::FunctionTemplate> hClass =
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v8::Local<v8::FunctionTemplate>::New(m_pIsolate, lpClass->m_hTemplate);
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v8::Local<v8::Object> hObject = hClass->InstanceTemplate()->NewInstance();
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FXJSE_UpdateObjectBinding(hObject, lpObject);
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m_hValue.Reset(m_pIsolate, hObject);
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}
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void CFXJSE_Value::SetArray(uint32_t uValueCount, CFXJSE_Value** rgValues) {
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CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
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v8::Local<v8::Array> hArrayObject = v8::Array::New(m_pIsolate, uValueCount);
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if (rgValues) {
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for (uint32_t i = 0; i < uValueCount; i++) {
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if (rgValues[i]) {
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hArrayObject->Set(i, v8::Local<v8::Value>::New(
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m_pIsolate, rgValues[i]->DirectGetValue()));
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}
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}
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}
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m_hValue.Reset(m_pIsolate, hArrayObject);
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}
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void CFXJSE_Value::SetDate(double dDouble) {
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CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
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v8::Local<v8::Value> hDate = v8::Date::New(m_pIsolate, dDouble);
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m_hValue.Reset(m_pIsolate, hDate);
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}
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void CFXJSE_Value::SetFloat(FX_FLOAT fFloat) {
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CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
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v8::Local<v8::Value> pValue = v8::Number::New(m_pIsolate, ftod(fFloat));
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m_hValue.Reset(m_pIsolate, pValue);
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}
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FX_BOOL CFXJSE_Value::SetObjectProperty(const CFX_ByteStringC& szPropName,
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CFXJSE_Value* lpPropValue) {
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ASSERT(lpPropValue);
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CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
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v8::Local<v8::Value> hObject =
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v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
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if (!hObject->IsObject())
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return FALSE;
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v8::Local<v8::Value> hPropValue =
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v8::Local<v8::Value>::New(m_pIsolate, lpPropValue->DirectGetValue());
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return (FX_BOOL)hObject.As<v8::Object>()->Set(
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v8::String::NewFromUtf8(m_pIsolate, szPropName.c_str(),
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v8::String::kNormalString,
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szPropName.GetLength()),
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hPropValue);
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}
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FX_BOOL CFXJSE_Value::GetObjectProperty(const CFX_ByteStringC& szPropName,
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CFXJSE_Value* lpPropValue) {
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ASSERT(lpPropValue);
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CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
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v8::Local<v8::Value> hObject =
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v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
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if (!hObject->IsObject())
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return FALSE;
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v8::Local<v8::Value> hPropValue =
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hObject.As<v8::Object>()->Get(v8::String::NewFromUtf8(
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m_pIsolate, szPropName.c_str(), v8::String::kNormalString,
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szPropName.GetLength()));
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lpPropValue->ForceSetValue(hPropValue);
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return TRUE;
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}
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FX_BOOL CFXJSE_Value::SetObjectProperty(uint32_t uPropIdx,
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CFXJSE_Value* lpPropValue) {
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CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
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v8::Local<v8::Value> hObject =
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v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
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if (!hObject->IsObject())
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return FALSE;
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v8::Local<v8::Value> hPropValue =
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v8::Local<v8::Value>::New(m_pIsolate, lpPropValue->DirectGetValue());
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return (FX_BOOL)hObject.As<v8::Object>()->Set(uPropIdx, hPropValue);
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}
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FX_BOOL CFXJSE_Value::GetObjectPropertyByIdx(uint32_t uPropIdx,
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CFXJSE_Value* lpPropValue) {
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CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
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v8::Local<v8::Value> hObject =
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v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
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if (!hObject->IsObject())
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return FALSE;
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v8::Local<v8::Value> hPropValue = hObject.As<v8::Object>()->Get(uPropIdx);
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lpPropValue->ForceSetValue(hPropValue);
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return TRUE;
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}
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FX_BOOL CFXJSE_Value::DeleteObjectProperty(const CFX_ByteStringC& szPropName) {
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CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
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v8::Local<v8::Value> hObject =
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v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
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if (!hObject->IsObject())
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return FALSE;
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hObject.As<v8::Object>()->Delete(v8::String::NewFromUtf8(
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m_pIsolate, szPropName.c_str(), v8::String::kNormalString,
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szPropName.GetLength()));
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return TRUE;
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}
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FX_BOOL CFXJSE_Value::HasObjectOwnProperty(const CFX_ByteStringC& szPropName,
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FX_BOOL bUseTypeGetter) {
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CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
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v8::Local<v8::Value> hObject =
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v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
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if (!hObject->IsObject())
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return FALSE;
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v8::Local<v8::String> hKey = v8::String::NewFromUtf8(
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m_pIsolate, szPropName.c_str(), v8::String::kNormalString,
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szPropName.GetLength());
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return hObject.As<v8::Object>()->HasRealNamedProperty(hKey) ||
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(bUseTypeGetter &&
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hObject.As<v8::Object>()
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->HasOwnProperty(m_pIsolate->GetCurrentContext(), hKey)
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.FromMaybe(false));
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}
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FX_BOOL CFXJSE_Value::SetObjectOwnProperty(const CFX_ByteStringC& szPropName,
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CFXJSE_Value* lpPropValue) {
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ASSERT(lpPropValue);
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CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
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v8::Local<v8::Value> hObject =
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v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
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if (!hObject->IsObject())
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return FALSE;
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v8::Local<v8::Value> pValue =
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v8::Local<v8::Value>::New(m_pIsolate, lpPropValue->m_hValue);
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return hObject.As<v8::Object>()
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->DefineOwnProperty(
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m_pIsolate->GetCurrentContext(),
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v8::String::NewFromUtf8(m_pIsolate, szPropName.c_str(),
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v8::String::kNormalString,
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szPropName.GetLength()),
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pValue)
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.FromMaybe(false);
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}
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FX_BOOL CFXJSE_Value::SetFunctionBind(CFXJSE_Value* lpOldFunction,
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CFXJSE_Value* lpNewThis) {
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ASSERT(lpOldFunction && lpNewThis);
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CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
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v8::Local<v8::Value> rgArgs[2];
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v8::Local<v8::Value> hOldFunction =
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v8::Local<v8::Value>::New(m_pIsolate, lpOldFunction->DirectGetValue());
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if (hOldFunction.IsEmpty() || !hOldFunction->IsFunction())
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return FALSE;
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rgArgs[0] = hOldFunction;
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v8::Local<v8::Value> hNewThis =
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v8::Local<v8::Value>::New(m_pIsolate, lpNewThis->DirectGetValue());
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if (hNewThis.IsEmpty())
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return FALSE;
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rgArgs[1] = hNewThis;
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v8::Local<v8::String> hBinderFuncSource =
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v8::String::NewFromUtf8(m_pIsolate,
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"(function (oldfunction, newthis) { return "
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"oldfunction.bind(newthis); })");
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v8::Local<v8::Function> hBinderFunc =
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v8::Script::Compile(hBinderFuncSource)->Run().As<v8::Function>();
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v8::Local<v8::Value> hBoundFunction =
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hBinderFunc->Call(m_pIsolate->GetCurrentContext()->Global(), 2, rgArgs);
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if (hBoundFunction.IsEmpty() || !hBoundFunction->IsFunction())
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return FALSE;
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m_hValue.Reset(m_pIsolate, hBoundFunction);
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return TRUE;
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}
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#define FXJSE_INVALID_PTR ((void*)(intptr_t)-1)
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FX_BOOL CFXJSE_Value::Call(CFXJSE_Value* lpReceiver,
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CFXJSE_Value* lpRetValue,
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uint32_t nArgCount,
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CFXJSE_Value** lpArgs) {
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CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
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v8::Local<v8::Value> hFunctionValue =
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v8::Local<v8::Value>::New(m_pIsolate, DirectGetValue());
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v8::Local<v8::Object> hFunctionObject =
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!hFunctionValue.IsEmpty() && hFunctionValue->IsObject()
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? hFunctionValue.As<v8::Object>()
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: v8::Local<v8::Object>();
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v8::TryCatch trycatch(m_pIsolate);
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if (hFunctionObject.IsEmpty() || !hFunctionObject->IsCallable()) {
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if (lpRetValue)
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lpRetValue->ForceSetValue(FXJSE_CreateReturnValue(m_pIsolate, trycatch));
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return FALSE;
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}
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v8::Local<v8::Value> hReturnValue;
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v8::Local<v8::Value>* lpLocalArgs = NULL;
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if (nArgCount) {
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lpLocalArgs = FX_Alloc(v8::Local<v8::Value>, nArgCount);
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for (uint32_t i = 0; i < nArgCount; i++) {
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new (lpLocalArgs + i) v8::Local<v8::Value>;
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CFXJSE_Value* lpArg = lpArgs[i];
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if (lpArg) {
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lpLocalArgs[i] =
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v8::Local<v8::Value>::New(m_pIsolate, lpArg->DirectGetValue());
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}
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if (lpLocalArgs[i].IsEmpty()) {
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lpLocalArgs[i] = v8::Undefined(m_pIsolate);
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}
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}
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}
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FX_BOOL bRetValue = TRUE;
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if (lpReceiver == FXJSE_INVALID_PTR) {
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v8::MaybeLocal<v8::Value> maybe_retvalue =
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hFunctionObject->CallAsConstructor(m_pIsolate->GetCurrentContext(),
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nArgCount, lpLocalArgs);
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hReturnValue = maybe_retvalue.FromMaybe(v8::Local<v8::Value>());
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} else {
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v8::Local<v8::Value> hReceiver;
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if (lpReceiver) {
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hReceiver =
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v8::Local<v8::Value>::New(m_pIsolate, lpReceiver->DirectGetValue());
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}
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if (hReceiver.IsEmpty() || !hReceiver->IsObject())
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hReceiver = v8::Object::New(m_pIsolate);
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v8::MaybeLocal<v8::Value> maybe_retvalue = hFunctionObject->CallAsFunction(
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m_pIsolate->GetCurrentContext(), hReceiver, nArgCount, lpLocalArgs);
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hReturnValue = maybe_retvalue.FromMaybe(v8::Local<v8::Value>());
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}
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if (trycatch.HasCaught()) {
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hReturnValue = FXJSE_CreateReturnValue(m_pIsolate, trycatch);
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bRetValue = FALSE;
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}
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if (lpRetValue)
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lpRetValue->ForceSetValue(hReturnValue);
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if (lpLocalArgs) {
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for (uint32_t i = 0; i < nArgCount; i++)
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lpLocalArgs[i].~Local();
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FX_Free(lpLocalArgs);
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}
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return bRetValue;
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}
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FX_BOOL CFXJSE_Value::IsUndefined() const {
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if (m_hValue.IsEmpty())
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return FALSE;
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CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
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v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
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return hValue->IsUndefined();
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}
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FX_BOOL CFXJSE_Value::IsNull() const {
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if (m_hValue.IsEmpty())
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return FALSE;
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CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
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v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
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return hValue->IsNull();
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}
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FX_BOOL CFXJSE_Value::IsBoolean() const {
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if (m_hValue.IsEmpty())
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return FALSE;
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CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
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v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
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return hValue->IsBoolean();
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}
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FX_BOOL CFXJSE_Value::IsString() const {
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if (m_hValue.IsEmpty())
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return FALSE;
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CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
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v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
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return hValue->IsString();
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}
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FX_BOOL CFXJSE_Value::IsNumber() const {
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if (m_hValue.IsEmpty())
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return FALSE;
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CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
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v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
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return hValue->IsNumber();
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}
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FX_BOOL CFXJSE_Value::IsInteger() const {
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if (m_hValue.IsEmpty())
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return FALSE;
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CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
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v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
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return hValue->IsInt32();
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}
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FX_BOOL CFXJSE_Value::IsObject() const {
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if (m_hValue.IsEmpty())
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return FALSE;
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CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
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v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
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return hValue->IsObject();
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}
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FX_BOOL CFXJSE_Value::IsArray() const {
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if (m_hValue.IsEmpty())
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return FALSE;
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CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
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v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
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return hValue->IsArray();
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}
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FX_BOOL CFXJSE_Value::IsFunction() const {
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if (m_hValue.IsEmpty())
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return FALSE;
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CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
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v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
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return hValue->IsFunction();
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}
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FX_BOOL CFXJSE_Value::IsDate() const {
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if (m_hValue.IsEmpty())
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return FALSE;
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CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
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v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
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return hValue->IsDate();
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}
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FX_BOOL CFXJSE_Value::ToBoolean() const {
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ASSERT(!m_hValue.IsEmpty());
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CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
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v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
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return static_cast<FX_BOOL>(hValue->BooleanValue());
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}
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FX_FLOAT CFXJSE_Value::ToFloat() const {
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ASSERT(!m_hValue.IsEmpty());
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CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
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v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
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return static_cast<FX_FLOAT>(hValue->NumberValue());
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}
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double CFXJSE_Value::ToDouble() const {
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ASSERT(!m_hValue.IsEmpty());
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CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
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v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
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return static_cast<double>(hValue->NumberValue());
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}
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int32_t CFXJSE_Value::ToInteger() const {
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ASSERT(!m_hValue.IsEmpty());
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CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
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v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
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return static_cast<int32_t>(hValue->NumberValue());
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}
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CFX_ByteString CFXJSE_Value::ToString() const {
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ASSERT(!m_hValue.IsEmpty());
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CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
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v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue);
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v8::Local<v8::String> hString = hValue->ToString();
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v8::String::Utf8Value hStringVal(hString);
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return CFX_ByteString(*hStringVal);
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}
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void CFXJSE_Value::SetUndefined() {
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CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
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v8::Local<v8::Value> hValue = v8::Undefined(m_pIsolate);
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m_hValue.Reset(m_pIsolate, hValue);
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}
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void CFXJSE_Value::SetNull() {
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CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
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v8::Local<v8::Value> hValue = v8::Null(m_pIsolate);
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m_hValue.Reset(m_pIsolate, hValue);
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}
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void CFXJSE_Value::SetBoolean(FX_BOOL bBoolean) {
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CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
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v8::Local<v8::Value> hValue = v8::Boolean::New(m_pIsolate, bBoolean != FALSE);
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m_hValue.Reset(m_pIsolate, hValue);
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}
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void CFXJSE_Value::SetInteger(int32_t nInteger) {
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CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
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v8::Local<v8::Value> hValue = v8::Integer::New(m_pIsolate, nInteger);
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m_hValue.Reset(m_pIsolate, hValue);
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}
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void CFXJSE_Value::SetDouble(double dDouble) {
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CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
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v8::Local<v8::Value> hValue = v8::Number::New(m_pIsolate, dDouble);
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m_hValue.Reset(m_pIsolate, hValue);
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}
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void CFXJSE_Value::SetString(const CFX_ByteStringC& szString) {
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CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
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v8::Local<v8::Value> hValue = v8::String::NewFromUtf8(
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m_pIsolate, reinterpret_cast<const char*>(szString.raw_str()),
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v8::String::kNormalString, szString.GetLength());
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m_hValue.Reset(m_pIsolate, hValue);
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}
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void CFXJSE_Value::SetJSObject() {
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CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
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v8::Local<v8::Value> hValue = v8::Object::New(m_pIsolate);
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m_hValue.Reset(m_pIsolate, hValue);
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}
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