Source code
Revision control
Copy as Markdown
Other Tools
/* -*- 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,
#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