/* -*- 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 "InputStreamUtils.h"

#include "nsIIPCSerializableInputStream.h"

#include "mozilla/Assertions.h"

#include "mozilla/dom/File.h"

#include "mozilla/dom/ipc/IPCBlobInputStream.h"

#include "mozilla/dom/ipc/IPCBlobInputStreamStorage.h"

#include "mozilla/SlicedInputStream.h"

#include "nsComponentManagerUtils.h"

#include "nsDebug.h"

#include "nsID.h"

#include "nsIXULRuntime.h"

#include "nsMIMEInputStream.h"

#include "nsMultiplexInputStream.h"

#include "nsNetCID.h"

#include "nsStringStream.h"

#include "nsXULAppAPI.h"

using namespace mozilla::dom;

namespace {

NS_DEFINE_CID(kStringInputStreamCID, NS_STRINGINPUTSTREAM_CID);

NS_DEFINE_CID(kFileInputStreamCID, NS_LOCALFILEINPUTSTREAM_CID);

NS_DEFINE_CID(kBufferedInputStreamCID, NS_BUFFEREDINPUTSTREAM_CID);

NS_DEFINE_CID(kMIMEInputStreamCID, NS_MIMEINPUTSTREAM_CID);

NS_DEFINE_CID(kMultiplexInputStreamCID, NS_MULTIPLEXINPUTSTREAM_CID);

}  // namespace

namespace mozilla {

namespace ipc {

void InputStreamHelper::SerializeInputStream(

    nsIInputStream* aInputStream, InputStreamParams& aParams,

    nsTArray<FileDescriptor>& aFileDescriptors) {

  MOZ_ASSERT(aInputStream);

  nsCOMPtr<nsIIPCSerializableInputStream> serializable =

      do_QueryInterface(aInputStream);

  if (!serializable) {

    MOZ_CRASH("Input stream is not serializable!");

  }

  serializable->Serialize(aParams, aFileDescriptors);

  if (aParams.type() == InputStreamParams::T__None) {

    MOZ_CRASH("Serialize failed!");

  }

}

already_AddRefed<nsIInputStream> InputStreamHelper::DeserializeInputStream(

    const InputStreamParams& aParams,

    const nsTArray<FileDescriptor>& aFileDescriptors) {

  nsCOMPtr<nsIInputStream> stream;

  nsCOMPtr<nsIIPCSerializableInputStream> serializable;

  // IPCBlobInputStreams are not deserializable on the parent side.

  if (aParams.type() == InputStreamParams::TIPCBlobInputStreamParams) {

    MOZ_ASSERT(XRE_IsParentProcess());

    IPCBlobInputStreamStorage::Get()->GetStream(

        aParams.get_IPCBlobInputStreamParams().id(),

        aParams.get_IPCBlobInputStreamParams().start(),

        aParams.get_IPCBlobInputStreamParams().length(),

        getter_AddRefs(stream));

    return stream.forget();

  }

  switch (aParams.type()) {

    case InputStreamParams::TStringInputStreamParams:

      serializable = do_CreateInstance(kStringInputStreamCID);

      break;

    case InputStreamParams::TFileInputStreamParams:

      serializable = do_CreateInstance(kFileInputStreamCID);

      break;

    case InputStreamParams::TBufferedInputStreamParams:

      serializable = do_CreateInstance(kBufferedInputStreamCID);

      break;

    case InputStreamParams::TMIMEInputStreamParams:

      serializable = do_CreateInstance(kMIMEInputStreamCID);

      break;

    case InputStreamParams::TMultiplexInputStreamParams:

      serializable = do_CreateInstance(kMultiplexInputStreamCID);

      break;

    case InputStreamParams::TSlicedInputStreamParams:

      serializable = new mozilla::SlicedInputStream();

      break;

    default:

      MOZ_ASSERT(false, "Unknown params!");

      return nullptr;

  }

  MOZ_ASSERT(serializable);

  if (!serializable->Deserialize(aParams, aFileDescriptors)) {

    MOZ_ASSERT(false, "Deserialize failed!");

    return nullptr;

  }

  stream = do_QueryInterface(serializable);

  MOZ_ASSERT(stream);

  return stream.forget();

}

}  // namespace ipc

}  // namespace mozilla