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