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// 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 "fxjse/include/cfxjse_value.h"
#include <math.h>
#include "fxjse/context.h"
#include "fxjse/include/cfxjse_class.h"
namespace {
double FXJSE_ftod(FX_FLOAT fNumber) {
static_assert(sizeof(FX_FLOAT) == 4, "FX_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(uint32_t uValueCount, CFXJSE_Value** rgValues) {
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate);
v8::Local<v8::Array> hArrayObject = v8::Array::New(m_pIsolate, uValueCount);
if (rgValues) {
for (uint32_t i = 0; i < uValueCount; i++) {
if (rgValues[i]) {
hArrayObject->Set(i, v8::Local<v8::Value>::New(
m_pIsolate, rgValues[i]->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(FX_FLOAT fFloat) {
CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate);
v8::Local<v8::Value> pValue = v8::Number::New(m_pIsolate, FXJSE_ftod(fFloat));
m_hValue.Reset(m_pIsolate, pValue);
}
FX_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 (FX_BOOL)hObject.As<v8::Object>()->Set(
v8::String::NewFromUtf8(m_pIsolate, szPropName.c_str(),
v8::String::kNormalString,
szPropName.GetLength()),
hPropValue);
}
FX_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;
}
FX_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 (FX_BOOL)hObject.As<v8::Object>()->Set(uPropIdx, hPropValue);
}
FX_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;
}
FX_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;
}
FX_BOOL CFXJSE_Value::HasObjectOwnProperty(const CFX_ByteStringC& szPropName,
FX_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));
}
FX_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);
}
FX_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)
FX_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);
}
}
}
FX_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;
}