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2a5b096e52
(needed for moving operations outside ActorsParent.cpp) Differential Revision: https://phabricator.services.mozilla.com/D181480
87 lines
2.7 KiB
C++
87 lines
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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "StreamUtils.h"
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#include "mozilla/Result.h"
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#include "mozilla/dom/quota/Assertions.h"
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#include "mozilla/dom/quota/QuotaCommon.h"
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#include "mozilla/dom/quota/ResultExtensions.h"
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#include "nsCOMPtr.h"
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#include "nsIFile.h"
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#include "nsIObjectInputStream.h"
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#include "nsIObjectOutputStream.h"
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#include "nsIOutputStream.h"
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#include "nsIRandomAccessStream.h"
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#include "nsNetUtil.h"
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namespace mozilla::dom::quota {
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Result<nsCOMPtr<nsIOutputStream>, nsresult> GetOutputStream(
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nsIFile& aFile, FileFlag aFileFlag) {
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AssertIsOnIOThread();
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switch (aFileFlag) {
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case FileFlag::Truncate:
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QM_TRY_RETURN(NS_NewLocalFileOutputStream(&aFile));
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case FileFlag::Update: {
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QM_TRY_INSPECT(const bool& exists,
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MOZ_TO_RESULT_INVOKE_MEMBER(&aFile, Exists));
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if (!exists) {
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return nsCOMPtr<nsIOutputStream>();
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}
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QM_TRY_INSPECT(const auto& stream,
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NS_NewLocalFileRandomAccessStream(&aFile));
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nsCOMPtr<nsIOutputStream> outputStream = do_QueryInterface(stream);
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QM_TRY(OkIf(outputStream), Err(NS_ERROR_FAILURE));
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return outputStream;
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}
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case FileFlag::Append:
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QM_TRY_RETURN(NS_NewLocalFileOutputStream(
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&aFile, PR_WRONLY | PR_CREATE_FILE | PR_APPEND));
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default:
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MOZ_CRASH("Should never get here!");
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}
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}
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Result<nsCOMPtr<nsIBinaryOutputStream>, nsresult> GetBinaryOutputStream(
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nsIFile& aFile, FileFlag aFileFlag) {
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QM_TRY_UNWRAP(auto outputStream, GetOutputStream(aFile, aFileFlag));
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QM_TRY(OkIf(outputStream), Err(NS_ERROR_UNEXPECTED));
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return nsCOMPtr<nsIBinaryOutputStream>(
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NS_NewObjectOutputStream(outputStream));
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}
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Result<nsCOMPtr<nsIBinaryInputStream>, nsresult> GetBinaryInputStream(
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nsIFile& aDirectory, const nsAString& aFilename) {
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MOZ_ASSERT(!NS_IsMainThread());
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QM_TRY_INSPECT(const auto& file, MOZ_TO_RESULT_INVOKE_MEMBER_TYPED(
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nsCOMPtr<nsIFile>, aDirectory, Clone));
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QM_TRY(MOZ_TO_RESULT(file->Append(aFilename)));
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QM_TRY_UNWRAP(auto stream, NS_NewLocalFileInputStream(file));
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QM_TRY_INSPECT(const auto& bufferedStream,
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NS_NewBufferedInputStream(stream.forget(), 512));
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QM_TRY(OkIf(bufferedStream), Err(NS_ERROR_FAILURE));
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return nsCOMPtr<nsIBinaryInputStream>(
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NS_NewObjectInputStream(bufferedStream));
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}
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} // namespace mozilla::dom::quota
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