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/* -*- 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/. */
#ifndef mozilla_ipc_InputStreamUtils_h
#define mozilla_ipc_InputStreamUtils_h
#include "mozilla/ipc/InputStreamParams.h"
#include "nsCOMPtr.h"
#include "nsIInputStream.h"
#include "nsTArray.h"
namespace mozilla {
namespace ipc {
class FileDescriptor;
// If you want to serialize an inputStream, please use SerializeIPCStream or
// nsIInputStream directly.
class InputStreamHelper {
public:
static void SerializedComplexity(nsIInputStream* aInputStream,
uint32_t aMaxSize, uint32_t* aSizeUsed,
uint32_t* aPipes, uint32_t* aTransferables);
// These 2 methods allow to serialize an inputStream into InputStreamParams.
// The manager is needed in case a stream needs to serialize itself as
// IPCRemoteStream.
// The stream serializes itself fully only if the resulting IPC message will
// be smaller than |aMaxSize|. Otherwise, the stream serializes itself as a
// DataPipe, and, its content will be sent to the other side of the IPC pipe
// in chunks. The IPC message size is returned into |aSizeUsed|.
static void SerializeInputStream(nsIInputStream* aInputStream,
InputStreamParams& aParams,
uint32_t aMaxSize, uint32_t* aSizeUsed);
// When a stream wants to serialize itself as a DataPipe, it uses this method.
static void SerializeInputStreamAsPipe(nsIInputStream* aInputStream,
InputStreamParams& aParams);
static already_AddRefed<nsIInputStream> DeserializeInputStream(
const InputStreamParams& aParams);
};
} // namespace ipc
} // namespace mozilla
#endif // mozilla_ipc_InputStreamUtils_h
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