зеркало из https://github.com/mozilla/gecko-dev.git
89 строки
2.7 KiB
C++
89 строки
2.7 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 "RandomAccessStreamUtils.h"
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#include "mozilla/NotNull.h"
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#include "mozilla/Result.h"
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#include "mozilla/ResultVariant.h"
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#include "mozilla/dom/quota/FileStreams.h"
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#include "mozilla/ipc/RandomAccessStreamParams.h"
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#include "nsFileStreams.h"
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#include "nsIInterfaceRequestor.h"
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#include "nsIRandomAccessStream.h"
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namespace mozilla::ipc {
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RandomAccessStreamParams SerializeRandomAccessStream(
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MovingNotNull<nsCOMPtr<nsIRandomAccessStream>> aStream,
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nsIInterfaceRequestor* aCallbacks) {
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NotNull<nsCOMPtr<nsIRandomAccessStream>> stream = std::move(aStream);
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RandomAccessStreamParams streamParams = stream->Serialize(aCallbacks);
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MOZ_ASSERT(streamParams.type() != RandomAccessStreamParams::T__None);
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return streamParams;
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}
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Maybe<RandomAccessStreamParams> SerializeRandomAccessStream(
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nsCOMPtr<nsIRandomAccessStream> aStream,
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nsIInterfaceRequestor* aCallbacks) {
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if (!aStream) {
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return Nothing();
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}
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return Some(SerializeRandomAccessStream(
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WrapMovingNotNullUnchecked(std::move(aStream)), aCallbacks));
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}
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Result<MovingNotNull<nsCOMPtr<nsIRandomAccessStream>>, bool>
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DeserializeRandomAccessStream(RandomAccessStreamParams& aStreamParams) {
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nsCOMPtr<nsIRandomAccessStream> stream;
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switch (aStreamParams.type()) {
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case RandomAccessStreamParams::TFileRandomAccessStreamParams:
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nsFileRandomAccessStream::Create(NS_GET_IID(nsIFileRandomAccessStream),
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getter_AddRefs(stream));
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break;
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case RandomAccessStreamParams::TLimitingFileRandomAccessStreamParams:
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stream = new dom::quota::FileRandomAccessStream();
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break;
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default:
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MOZ_ASSERT_UNREACHABLE("Unknown params!");
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return Err(false);
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}
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MOZ_ASSERT(stream);
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if (!stream->Deserialize(aStreamParams)) {
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MOZ_ASSERT_UNREACHABLE("Deserialize failed!");
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return Err(false);
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}
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return WrapMovingNotNullUnchecked(std::move(stream));
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}
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Result<nsCOMPtr<nsIRandomAccessStream>, bool> DeserializeRandomAccessStream(
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Maybe<RandomAccessStreamParams>& aStreamParams) {
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if (aStreamParams.isNothing()) {
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return nsCOMPtr<nsIRandomAccessStream>();
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}
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auto res = DeserializeRandomAccessStream(aStreamParams.ref());
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if (res.isErr()) {
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return res.propagateErr();
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}
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MovingNotNull<nsCOMPtr<nsIRandomAccessStream>> stream = res.unwrap();
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return std::move(stream).unwrapBasePtr();
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}
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} // namespace mozilla::ipc
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