зеркало из https://github.com/mozilla/gecko-dev.git
88 строки
2.7 KiB
C++
88 строки
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
|
|
* You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#include "StreamUtils.h"
|
|
|
|
#include "mozilla/Result.h"
|
|
#include "mozilla/dom/quota/Assertions.h"
|
|
#include "mozilla/dom/quota/QuotaCommon.h"
|
|
#include "mozilla/dom/quota/ResultExtensions.h"
|
|
#include "nsCOMPtr.h"
|
|
#include "nsIFile.h"
|
|
#include "nsIObjectInputStream.h"
|
|
#include "nsIObjectOutputStream.h"
|
|
#include "nsIOutputStream.h"
|
|
#include "nsIRandomAccessStream.h"
|
|
#include "nsNetUtil.h"
|
|
|
|
namespace mozilla::dom::quota {
|
|
|
|
Result<nsCOMPtr<nsIOutputStream>, nsresult> GetOutputStream(
|
|
nsIFile& aFile, FileFlag aFileFlag) {
|
|
AssertIsOnIOThread();
|
|
|
|
switch (aFileFlag) {
|
|
case FileFlag::Truncate:
|
|
QM_TRY_RETURN(NS_NewLocalFileOutputStream(&aFile));
|
|
|
|
case FileFlag::Update: {
|
|
QM_TRY_INSPECT(const bool& exists,
|
|
MOZ_TO_RESULT_INVOKE_MEMBER(&aFile, Exists));
|
|
|
|
if (!exists) {
|
|
return nsCOMPtr<nsIOutputStream>();
|
|
}
|
|
|
|
QM_TRY_INSPECT(const auto& stream,
|
|
NS_NewLocalFileRandomAccessStream(&aFile));
|
|
|
|
nsCOMPtr<nsIOutputStream> outputStream = do_QueryInterface(stream);
|
|
QM_TRY(OkIf(outputStream), Err(NS_ERROR_FAILURE));
|
|
|
|
return outputStream;
|
|
}
|
|
|
|
case FileFlag::Append:
|
|
QM_TRY_RETURN(NS_NewLocalFileOutputStream(
|
|
&aFile, PR_WRONLY | PR_CREATE_FILE | PR_APPEND));
|
|
|
|
default:
|
|
MOZ_CRASH("Should never get here!");
|
|
}
|
|
}
|
|
|
|
Result<nsCOMPtr<nsIBinaryOutputStream>, nsresult> GetBinaryOutputStream(
|
|
nsIFile& aFile, FileFlag aFileFlag) {
|
|
QM_TRY_UNWRAP(auto outputStream, GetOutputStream(aFile, aFileFlag));
|
|
|
|
QM_TRY(OkIf(outputStream), Err(NS_ERROR_UNEXPECTED));
|
|
|
|
return nsCOMPtr<nsIBinaryOutputStream>(
|
|
NS_NewObjectOutputStream(outputStream));
|
|
}
|
|
|
|
Result<nsCOMPtr<nsIBinaryInputStream>, nsresult> GetBinaryInputStream(
|
|
nsIFile& aDirectory, const nsAString& aFilename) {
|
|
MOZ_ASSERT(!NS_IsMainThread());
|
|
|
|
QM_TRY_INSPECT(const auto& file, MOZ_TO_RESULT_INVOKE_MEMBER_TYPED(
|
|
nsCOMPtr<nsIFile>, aDirectory, Clone));
|
|
|
|
QM_TRY(MOZ_TO_RESULT(file->Append(aFilename)));
|
|
|
|
QM_TRY_UNWRAP(auto stream, NS_NewLocalFileInputStream(file));
|
|
|
|
QM_TRY_INSPECT(const auto& bufferedStream,
|
|
NS_NewBufferedInputStream(stream.forget(), 512));
|
|
|
|
QM_TRY(OkIf(bufferedStream), Err(NS_ERROR_FAILURE));
|
|
|
|
return nsCOMPtr<nsIBinaryInputStream>(
|
|
NS_NewObjectInputStream(bufferedStream));
|
|
}
|
|
|
|
} // namespace mozilla::dom::quota
|