mirror of
https://github.com/mozilla/gecko-dev.git
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139 lines
3.5 KiB
C++
139 lines
3.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "StructuredCloneData.h"
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#include "nsIDOMDOMException.h"
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#include "nsIMutable.h"
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#include "nsIXPConnect.h"
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#include "ipc/IPCMessageUtils.h"
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#include "mozilla/dom/BindingUtils.h"
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#include "mozilla/dom/BlobBinding.h"
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#include "mozilla/dom/File.h"
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#include "mozilla/dom/ToJSValue.h"
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#include "nsContentUtils.h"
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#include "nsJSEnvironment.h"
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#include "MainThreadUtils.h"
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#include "StructuredCloneTags.h"
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#include "jsapi.h"
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namespace mozilla {
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namespace dom {
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namespace ipc {
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bool
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StructuredCloneData::Copy(const StructuredCloneData& aData)
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{
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if (!aData.Data()) {
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return true;
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}
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if (aData.SharedData()) {
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mSharedData = aData.SharedData();
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} else {
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mSharedData =
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SharedJSAllocatedData::CreateFromExternalData(aData.Data(),
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aData.DataLength());
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NS_ENSURE_TRUE(mSharedData, false);
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}
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MOZ_ASSERT(BlobImpls().IsEmpty());
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BlobImpls().AppendElements(aData.BlobImpls());
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MOZ_ASSERT(GetSurfaces().IsEmpty());
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return true;
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}
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void
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StructuredCloneData::Read(JSContext* aCx,
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JS::MutableHandle<JS::Value> aValue,
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ErrorResult &aRv)
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{
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MOZ_ASSERT(Data());
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nsIGlobalObject *global = xpc::NativeGlobal(JS::CurrentGlobalOrNull(aCx));
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MOZ_ASSERT(global);
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ReadFromBuffer(global, aCx, Data(), DataLength(), aValue, aRv);
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}
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void
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StructuredCloneData::Write(JSContext* aCx,
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JS::Handle<JS::Value> aValue,
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ErrorResult &aRv)
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{
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MOZ_ASSERT(!Data());
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StructuredCloneHolder::Write(aCx, aValue, aRv);
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if (NS_WARN_IF(aRv.Failed())) {
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return;
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}
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uint64_t* data = nullptr;
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size_t dataLength = 0;
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mBuffer->steal(&data, &dataLength);
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mBuffer = nullptr;
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mSharedData = new SharedJSAllocatedData(data, dataLength);
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}
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void
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StructuredCloneData::WriteIPCParams(IPC::Message* aMsg) const
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{
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WriteParam(aMsg, DataLength());
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if (DataLength()) {
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// Structured clone data must be 64-bit aligned.
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aMsg->WriteBytes(Data(), DataLength(), sizeof(uint64_t));
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}
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}
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bool
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StructuredCloneData::ReadIPCParams(const IPC::Message* aMsg,
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void** aIter)
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{
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MOZ_ASSERT(!Data());
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size_t dataLength = 0;
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if (!ReadParam(aMsg, aIter, &dataLength)) {
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return false;
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}
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if (!dataLength) {
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return true;
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}
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uint64_t* dataBuffer = nullptr;
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const char** buffer =
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const_cast<const char**>(reinterpret_cast<char**>(&dataBuffer));
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// Structured clone data must be 64-bit aligned.
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if (!aMsg->ReadBytes(aIter, buffer, dataLength, sizeof(uint64_t))) {
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return false;
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}
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mSharedData = SharedJSAllocatedData::CreateFromExternalData(dataBuffer,
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dataLength);
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NS_ENSURE_TRUE(mSharedData, false);
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return true;
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}
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bool
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StructuredCloneData::CopyExternalData(const void* aData,
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size_t aDataLength)
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{
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MOZ_ASSERT(!Data());
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mSharedData = SharedJSAllocatedData::CreateFromExternalData(aData,
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aDataLength);
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NS_ENSURE_TRUE(mSharedData, false);
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return true;
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}
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} // namespace ipc
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} // namespace dom
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} // namespace mozilla
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