/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
/* vim: set ts=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_dom_bluetooth_bluedroid_bluetoothdaemonhelpers_h__
#define mozilla_dom_bluetooth_bluedroid_bluetoothdaemonhelpers_h__

#include "BluetoothCommon.h"
#include "mozilla/ArrayUtils.h"
#include "mozilla/dom/bluetooth/BluetoothTypes.h"
#include "mozilla/ipc/BluetoothDaemonConnection.h"
#include "nsThreadUtils.h"

#if MOZ_IS_GCC && MOZ_GCC_VERSION_AT_LEAST(4, 7, 0)
/* use designated array initializers if supported */
#define INIT_ARRAY_AT(in_, out_) \
  [in_] = out_
#else
/* otherwise init array element by position */
#define INIT_ARRAY_AT(in_, out_) \
  out_
#endif

#define CONVERT(in_, out_) \
  INIT_ARRAY_AT(in_, out_)

using namespace mozilla::ipc;

BEGIN_BLUETOOTH_NAMESPACE

//
// Helper structures
//

enum BluetoothAclState {
  ACL_STATE_CONNECTED,
  ACL_STATE_DISCONNECTED
};

enum BluetoothSspPairingVariant {
  SSP_VARIANT_PASSKEY_CONFIRMATION,
  SSP_VARIANT_PASSKEY_ENTRY,
  SSP_VARIANT_CONSENT,
  SSP_VARIANT_PASSKEY_NOTIFICATION
};

struct BluetoothAddress {
  uint8_t mAddr[6];
};

struct BluetoothConfigurationParameter {
  uint8_t mType;
  uint16_t mLength;
  nsAutoArrayPtr<uint8_t> mValue;
};

struct BluetoothDaemonPDUHeader {
  BluetoothDaemonPDUHeader()
  : mService(0x00)
  , mOpcode(0x00)
  , mLength(0x00)
  { }

  BluetoothDaemonPDUHeader(uint8_t aService, uint8_t aOpcode, uint8_t aLength)
  : mService(aService)
  , mOpcode(aOpcode)
  , mLength(aLength)
  { }

  uint8_t mService;
  uint8_t mOpcode;
  uint16_t mLength;
};

struct BluetoothPinCode {
  uint8_t mPinCode[16];
  uint8_t mLength;
};

struct BluetoothRemoteName {
  uint8_t mName[249];
};

struct BluetoothServiceName {
  uint8_t mName[256];
};

//
// Conversion
//
// PDUs can only store primitive data types, such as intergers or
// strings. Gecko often uses more complex data types, such as
// enumators or stuctures. Conversion functions convert between
// primitive data and internal Gecko's data types during a PDU's
// packing and unpacking.
//

nsresult
Convert(bool aIn, uint8_t& aOut);

nsresult
Convert(bool aIn, BluetoothScanMode& aOut);

nsresult
Convert(int aIn, uint8_t& aOut);

nsresult
Convert(int aIn, int16_t& aOut);

nsresult
Convert(uint8_t aIn, bool& aOut);

nsresult
Convert(uint8_t aIn, char& aOut);

nsresult
Convert(uint8_t aIn, int& aOut);

nsresult
Convert(uint8_t aIn, BluetoothA2dpAudioState& aOut);

nsresult
Convert(uint8_t aIn, BluetoothA2dpConnectionState& aOut);

nsresult
Convert(uint8_t aIn, BluetoothAclState& aOut);

nsresult
Convert(uint8_t aIn, BluetoothHandsfreeAudioState& aOut);

nsresult
Convert(uint8_t aIn, BluetoothHandsfreeCallHoldType& aOut);

nsresult
Convert(uint8_t aIn, BluetoothHandsfreeConnectionState& aOut);

nsresult
Convert(uint8_t aIn, BluetoothHandsfreeNRECState& aOut);

nsresult
Convert(uint8_t aIn, BluetoothHandsfreeVoiceRecognitionState& aOut);

nsresult
Convert(uint8_t aIn, BluetoothHandsfreeVolumeType& aOut);

nsresult
Convert(uint8_t aIn, BluetoothBondState& aOut);

nsresult
Convert(uint8_t aIn, BluetoothDeviceType& aOut);

nsresult
Convert(uint8_t aIn, BluetoothPropertyType& aOut);

nsresult
Convert(uint8_t aIn, BluetoothScanMode& aOut);

nsresult
Convert(uint8_t aIn, BluetoothSspPairingVariant& aOut);

nsresult
Convert(uint8_t aIn, BluetoothStatus& aOut);

nsresult
Convert(uint32_t aIn, int& aOut);

nsresult
Convert(size_t aIn, uint16_t& aOut);

nsresult
Convert(const nsAString& aIn, BluetoothAddress& aOut);

nsresult
Convert(const nsAString& aIn, BluetoothPinCode& aOut);

nsresult
Convert(const nsAString& aIn, BluetoothPropertyType& aOut);

nsresult
Convert(const nsAString& aIn, BluetoothServiceName& aOut);

nsresult
Convert(const nsAString& aIn, BluetoothSspPairingVariant& aOut);

nsresult
Convert(BluetoothAclState aIn, bool& aOut);

nsresult
Convert(const BluetoothAddress& aIn, nsAString& aOut);

nsresult
Convert(BluetoothHandsfreeAtResponse aIn, uint8_t& aOut);

nsresult
Convert(BluetoothHandsfreeCallAddressType aIn, uint8_t& aOut);

nsresult
Convert(BluetoothHandsfreeCallDirection aIn, uint8_t& aOut);

nsresult
Convert(BluetoothHandsfreeCallState aIn, uint8_t& aOut);

nsresult
Convert(BluetoothHandsfreeCallMode aIn, uint8_t& aOut);

nsresult
Convert(BluetoothHandsfreeCallMptyType aIn, uint8_t& aOut);

nsresult
Convert(BluetoothHandsfreeNetworkState aIn, uint8_t& aOut);

nsresult
Convert(BluetoothHandsfreeServiceType aIn, uint8_t& aOut);

nsresult
Convert(BluetoothHandsfreeVolumeType aIn, uint8_t& aOut);

nsresult
Convert(BluetoothPropertyType aIn, uint8_t& aOut);

nsresult
Convert(const BluetoothRemoteName& aIn, nsAString& aOut);

nsresult
Convert(BluetoothScanMode aIn, uint8_t& aOut);

nsresult
Convert(BluetoothSocketType aIn, uint8_t& aOut);

nsresult
Convert(BluetoothSspPairingVariant aIn, uint8_t& aOut);

nsresult
Convert(BluetoothSspPairingVariant aIn, nsAString& aOut);

//
// Packing
//

nsresult
PackPDU(bool aIn, BluetoothDaemonPDU& aPDU);

inline nsresult
PackPDU(uint8_t aIn, BluetoothDaemonPDU& aPDU)
{
  return aPDU.Write(aIn);
}

inline nsresult
PackPDU(uint16_t aIn, BluetoothDaemonPDU& aPDU)
{
  return aPDU.Write(aIn);
}

inline nsresult
PackPDU(int32_t aIn, BluetoothDaemonPDU& aPDU)
{
  return aPDU.Write(aIn);
}

inline nsresult
PackPDU(uint32_t aIn, BluetoothDaemonPDU& aPDU)
{
  return aPDU.Write(aIn);
}

nsresult
PackPDU(const BluetoothAddress& aIn, BluetoothDaemonPDU& aPDU);

nsresult
PackPDU(const BluetoothConfigurationParameter& aIn, BluetoothDaemonPDU& aPDU);

nsresult
PackPDU(const BluetoothDaemonPDUHeader& aIn, BluetoothDaemonPDU& aPDU);

nsresult
PackPDU(const BluetoothHandsfreeAtResponse& aIn, BluetoothDaemonPDU& aPDU);

nsresult
PackPDU(const BluetoothHandsfreeCallAddressType& aIn, BluetoothDaemonPDU& aPDU);

nsresult
PackPDU(const BluetoothHandsfreeCallDirection& aIn, BluetoothDaemonPDU& aPDU);

nsresult
PackPDU(const BluetoothHandsfreeCallMode& aIn, BluetoothDaemonPDU& aPDU);

nsresult
PackPDU(const BluetoothHandsfreeCallMptyType& aIn, BluetoothDaemonPDU& aPDU);

nsresult
PackPDU(const BluetoothHandsfreeCallState& aIn, BluetoothDaemonPDU& aPDU);

nsresult
PackPDU(const BluetoothHandsfreeNetworkState& aIn, BluetoothDaemonPDU& aPDU);

nsresult
PackPDU(const BluetoothHandsfreeServiceType& aIn, BluetoothDaemonPDU& aPDU);

nsresult
PackPDU(const BluetoothHandsfreeVolumeType& aIn, BluetoothDaemonPDU& aPDU);

nsresult
PackPDU(const BluetoothNamedValue& aIn, BluetoothDaemonPDU& aPDU);

nsresult
PackPDU(const BluetoothPinCode& aIn, BluetoothDaemonPDU& aPDU);

nsresult
PackPDU(BluetoothPropertyType aIn, BluetoothDaemonPDU& aPDU);

nsresult
PackPDU(const BluetoothServiceName& aIn, BluetoothDaemonPDU& aPDU);

nsresult
PackPDU(BluetoothSocketType aIn, BluetoothDaemonPDU& aPDU);

nsresult
PackPDU(BluetoothSspPairingVariant aIn, BluetoothDaemonPDU& aPDU);

nsresult
PackPDU(BluetoothScanMode aIn, BluetoothDaemonPDU& aPDU);

/* |PackConversion| is a helper for packing converted values. Pass
 * an instance of this structure to |PackPDU| to convert a value from
 * the input type to the output type and and write it to the PDU.
 */
template<typename Tin, typename Tout>
struct PackConversion {
  PackConversion(const Tin& aIn)
  : mIn(aIn)
  { }

  const Tin& mIn;
};

template<typename Tin, typename Tout>
inline nsresult
PackPDU(const PackConversion<Tin, Tout>& aIn, BluetoothDaemonPDU& aPDU)
{
  Tout out;

  nsresult rv = Convert(aIn.mIn, out);
  if (NS_FAILED(rv)) {
    return rv;
  }
  return PackPDU(out, aPDU);
}

/* |PackArray| is a helper for packing arrays. Pass an instance
 * of this structure as the first argument to |PackPDU| to pack
 * an array. The array's maximum default length is 255 elements.
 */
template <typename T>
struct PackArray
{
  PackArray(const T* aData, size_t aLength)
  : mData(aData)
  , mLength(aLength)
  { }

  const T* mData;
  size_t mLength;
};

/* This implementation of |PackPDU| packs the length of an array
 * and the elements of the array one-by-one.
 */
template<typename T>
inline nsresult
PackPDU(const PackArray<T>& aIn, BluetoothDaemonPDU& aPDU)
{
  for (size_t i = 0; i < aIn.mLength; ++i) {
    nsresult rv = PackPDU(aIn.mData[i], aPDU);
    if (NS_FAILED(rv)) {
      return rv;
    }
  }
  return NS_OK;
}

template<>
inline nsresult
PackPDU<uint8_t>(const PackArray<uint8_t>& aIn, BluetoothDaemonPDU& aPDU)
{
  /* Write raw bytes in one pass */
  return aPDU.Write(aIn.mData, aIn.mLength);
}

/* |PackCString0| is a helper for packing 0-terminated C string,
 * including the \0 character. Pass an instance of this structure
 * as the first argument to |PackPDU| to pack a string.
 */
struct PackCString0
{
  PackCString0(const nsCString& aString)
  : mString(aString)
  { }

  const nsCString& mString;
};

/* This implementation of |PackPDU| packs a 0-terminated C string.
 */
inline nsresult
PackPDU(const PackCString0& aIn, BluetoothDaemonPDU& aPDU)
{
  return PackPDU(
    PackArray<uint8_t>(reinterpret_cast<const uint8_t*>(aIn.mString.get()),
                       aIn.mString.Length() + 1), aPDU);
}

template <typename T1, typename T2>
inline nsresult
PackPDU(const T1& aIn1, const T2& aIn2, BluetoothDaemonPDU& aPDU)
{
  nsresult rv = PackPDU(aIn1, aPDU);
  if (NS_FAILED(rv)) {
    return rv;
  }
  return PackPDU(aIn2, aPDU);
}

template <typename T1, typename T2, typename T3>
inline nsresult
PackPDU(const T1& aIn1, const T2& aIn2, const T3& aIn3,
        BluetoothDaemonPDU& aPDU)
{
  nsresult rv = PackPDU(aIn1, aPDU);
  if (NS_FAILED(rv)) {
    return rv;
  }
  rv = PackPDU(aIn2, aPDU);
  if (NS_FAILED(rv)) {
    return rv;
  }
  return PackPDU(aIn3, aPDU);
}

template <typename T1, typename T2, typename T3, typename T4>
inline nsresult
PackPDU(const T1& aIn1, const T2& aIn2, const T3& aIn3, const T4& aIn4,
        BluetoothDaemonPDU& aPDU)
{
  nsresult rv = PackPDU(aIn1, aPDU);
  if (NS_FAILED(rv)) {
    return rv;
  }
  rv = PackPDU(aIn2, aPDU);
  if (NS_FAILED(rv)) {
    return rv;
  }
  rv = PackPDU(aIn3, aPDU);
  if (NS_FAILED(rv)) {
    return rv;
  }
  return PackPDU(aIn4, aPDU);
}

template <typename T1, typename T2, typename T3,
          typename T4, typename T5>
inline nsresult
PackPDU(const T1& aIn1, const T2& aIn2, const T3& aIn3,
        const T4& aIn4, const T5& aIn5,
        BluetoothDaemonPDU& aPDU)
{
  nsresult rv = PackPDU(aIn1, aPDU);
  if (NS_FAILED(rv)) {
    return rv;
  }
  rv = PackPDU(aIn2, aPDU);
  if (NS_FAILED(rv)) {
    return rv;
  }
  rv = PackPDU(aIn3, aPDU);
  if (NS_FAILED(rv)) {
    return rv;
  }
  rv = PackPDU(aIn4, aPDU);
  if (NS_FAILED(rv)) {
    return rv;
  }
  return PackPDU(aIn5, aPDU);
}

template <typename T1, typename T2, typename T3,
          typename T4, typename T5, typename T6,
          typename T7>
inline nsresult
PackPDU(const T1& aIn1, const T2& aIn2, const T3& aIn3,
        const T4& aIn4, const T5& aIn5, const T6& aIn6,
        const T7& aIn7, BluetoothDaemonPDU& aPDU)
{
  nsresult rv = PackPDU(aIn1, aPDU);
  if (NS_FAILED(rv)) {
    return rv;
  }
  rv = PackPDU(aIn2, aPDU);
  if (NS_FAILED(rv)) {
    return rv;
  }
  rv = PackPDU(aIn3, aPDU);
  if (NS_FAILED(rv)) {
    return rv;
  }
  rv = PackPDU(aIn4, aPDU);
  if (NS_FAILED(rv)) {
    return rv;
  }
  rv = PackPDU(aIn5, aPDU);
  if (NS_FAILED(rv)) {
    return rv;
  }
  rv = PackPDU(aIn6, aPDU);
  if (NS_FAILED(rv)) {
    return rv;
  }
  return PackPDU(aIn7, aPDU);
}

//
// Unpacking
//

inline nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, int8_t& aOut)
{
  return aPDU.Read(aOut);
}

inline nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, uint8_t& aOut)
{
  return aPDU.Read(aOut);
}

inline nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, uint16_t& aOut)
{
  return aPDU.Read(aOut);
}

inline nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, int32_t& aOut)
{
  return aPDU.Read(aOut);
}

inline nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, uint32_t& aOut)
{
  return aPDU.Read(aOut);
}

nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, bool& aOut);

nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, char& aOut);

nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, BluetoothA2dpAudioState& aOut);

nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, BluetoothA2dpConnectionState& aOut);

nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, BluetoothAclState& aOut);

inline nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, BluetoothAddress& aOut)
{
  return aPDU.Read(aOut.mAddr, sizeof(aOut.mAddr));
}

nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, BluetoothBondState& aOut);

inline nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, BluetoothDaemonPDUHeader& aOut)
{
  nsresult rv = UnpackPDU(aPDU, aOut.mService);
  if (NS_FAILED(rv)) {
    return rv;
  }
  rv = UnpackPDU(aPDU, aOut.mOpcode);
  if (NS_FAILED(rv)) {
    return rv;
  }
  return UnpackPDU(aPDU, aOut.mLength);
}

nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, BluetoothDeviceType& aOut);

nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, BluetoothHandsfreeAudioState& aOut);

nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, BluetoothHandsfreeCallHoldType& aOut);

nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, BluetoothHandsfreeConnectionState& aOut);

nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, BluetoothHandsfreeNRECState& aOut);

nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU,
          BluetoothHandsfreeVoiceRecognitionState& aOut);

nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, BluetoothHandsfreeVolumeType& aOut);

nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, BluetoothRemoteInfo& aOut);

inline nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, BluetoothRemoteName& aOut)
{
  return aPDU.Read(aOut.mName, sizeof(aOut.mName));
}

nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, BluetoothProperty& aOut);

nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, BluetoothPropertyType& aOut);

nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, BluetoothScanMode& aOut);

nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, BluetoothServiceRecord& aOut);

nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, BluetoothSspPairingVariant& aOut);

nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, BluetoothStatus& aOut);

inline nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, BluetoothUuid& aOut)
{
  return aPDU.Read(aOut.mUuid, sizeof(aOut.mUuid));
}

nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, nsDependentCString& aOut);

/* |UnpackConversion| is a helper for convering unpacked values. Pass
 * an instance of this structure to |UnpackPDU| to read a value from
 * the PDU in the input type and convert it to the output type.
 */
template<typename Tin, typename Tout>
struct UnpackConversion {
  UnpackConversion(Tout& aOut)
  : mOut(aOut)
  { }

  Tout& mOut;
};

template<typename Tin, typename Tout>
inline nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, const UnpackConversion<Tin, Tout>& aOut)
{
  Tin in;
  nsresult rv = UnpackPDU(aPDU, in);
  if (NS_FAILED(rv)) {
    return rv;
  }
  return Convert(in, aOut.mOut);
}

/* |UnpackArray| is a helper for unpacking arrays. Pass an instance
 * of this structure as the second argument to |UnpackPDU| to unpack
 * an array.
 */
template <typename T>
struct UnpackArray
{
  UnpackArray(T* aData, size_t aLength)
  : mData(aData)
  , mLength(aLength)
  { }

  UnpackArray(nsAutoArrayPtr<T>& aData, size_t aLength)
  : mData(nullptr)
  , mLength(aLength)
  {
    aData = new T[mLength];
    mData = aData.get();
  }

  UnpackArray(nsAutoArrayPtr<T>& aData, size_t aSize, size_t aElemSize)
  : mData(nullptr)
  , mLength(aSize / aElemSize)
  {
    aData = new T[mLength];
    mData = aData.get();
  }

  T* mData;
  size_t mLength;
};

template<typename T>
inline nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, const UnpackArray<T>& aOut)
{
  for (size_t i = 0; i < aOut.mLength; ++i) {
    nsresult rv = UnpackPDU(aPDU, aOut.mData[i]);
    if (NS_FAILED(rv)) {
      return rv;
    }
  }
  return NS_OK;
}

template<>
inline nsresult
UnpackPDU<uint8_t>(BluetoothDaemonPDU& aPDU, const UnpackArray<uint8_t>& aOut)
{
  /* Read raw bytes in one pass */
  return aPDU.Read(aOut.mData, aOut.mLength);
}

template<typename T>
inline nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, nsTArray<T>& aOut)
{
  for (typename nsTArray<T>::size_type i = 0; i < aOut.Length(); ++i) {
    nsresult rv = UnpackPDU(aPDU, aOut[i]);
    if (NS_FAILED(rv)) {
      return rv;
    }
  }
  return NS_OK;
}

/* |UnpackCString0| is a helper for unpacking 0-terminated C string,
 * including the \0 character. Pass an instance of this structure
 * as the first argument to |UnpackPDU| to unpack a string.
 */
struct UnpackCString0
{
  UnpackCString0(nsCString& aString)
    : mString(&aString)
  { }

  nsCString* mString; // non-null by construction
};

/* This implementation of |UnpackPDU| unpacks a 0-terminated C string.
 */
nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, const UnpackCString0& aOut);

/* |UnpackString0| is a helper for unpacking 0-terminated C string,
 * including the \0 character. Pass an instance of this structure
 * as the first argument to |UnpackPDU| to unpack a C string and convert
 * it to wide-character encoding.
 */
struct UnpackString0
{
  UnpackString0(nsString& aString)
    : mString(&aString)
  { }

  nsString* mString; // non-null by construction
};

/* This implementation of |UnpackPDU| unpacks a 0-terminated C string
 * and converts it to wide-character encoding.
 */
nsresult
UnpackPDU(BluetoothDaemonPDU& aPDU, const UnpackString0& aOut);

//
// Init operators
//

// |PDUInitOP| provides functionality for init operators that unpack PDUs.
class PDUInitOp
{
protected:
  PDUInitOp(BluetoothDaemonPDU& aPDU)
  : mPDU(&aPDU)
  { }

  BluetoothDaemonPDU& GetPDU() const
  {
    return *mPDU; // cannot be nullptr
  }

  void WarnAboutTrailingData() const
  {
    size_t size = mPDU->GetSize();

    if (MOZ_LIKELY(!size)) {
      return;
    }

    uint8_t service, opcode;
    uint16_t payloadSize;
    mPDU->GetHeader(service, opcode, payloadSize);

    BT_LOGR("Unpacked PDU of type (%x,%x) still contains %zu Bytes of data.",
            service, opcode, size);
  }

private:
  BluetoothDaemonPDU* mPDU; // Hold pointer to allow for constant instances
};

// |UnpackPDUInitOp| is a general-purpose init operator for all variants
// of |BluetoothResultRunnable| and |BluetoothNotificationRunnable|. The
// call operators of |UnpackPDUInitOp| unpack a PDU into the supplied
// arguments.
class UnpackPDUInitOp MOZ_FINAL : private PDUInitOp
{
public:
  UnpackPDUInitOp(BluetoothDaemonPDU& aPDU)
  : PDUInitOp(aPDU)
  { }

  nsresult operator () () const
  {
    WarnAboutTrailingData();
    return NS_OK;
  }

  template<typename T1>
  nsresult operator () (T1& aArg1) const
  {
    nsresult rv = UnpackPDU(GetPDU(), aArg1);
    if (NS_FAILED(rv)) {
      return rv;
    }
    WarnAboutTrailingData();
    return NS_OK;
  }

  template<typename T1, typename T2>
  nsresult operator () (T1& aArg1, T2& aArg2) const
  {
    BluetoothDaemonPDU& pdu = GetPDU();

    nsresult rv = UnpackPDU(pdu, aArg1);
    if (NS_FAILED(rv)) {
      return rv;
    }
    rv = UnpackPDU(pdu, aArg2);
    if (NS_FAILED(rv)) {
      return rv;
    }
    WarnAboutTrailingData();
    return NS_OK;
  }

  template<typename T1, typename T2, typename T3>
  nsresult operator () (T1& aArg1, T2& aArg2, T3& aArg3) const
  {
    BluetoothDaemonPDU& pdu = GetPDU();

    nsresult rv = UnpackPDU(pdu, aArg1);
    if (NS_FAILED(rv)) {
      return rv;
    }
    rv = UnpackPDU(pdu, aArg2);
    if (NS_FAILED(rv)) {
      return rv;
    }
    rv = UnpackPDU(pdu, aArg3);
    if (NS_FAILED(rv)) {
      return rv;
    }
    WarnAboutTrailingData();
    return NS_OK;
  }

  template<typename T1, typename T2, typename T3, typename T4>
  nsresult operator () (T1& aArg1, T2& aArg2, T3& aArg3, T4& aArg4) const
  {
    BluetoothDaemonPDU& pdu = GetPDU();

    nsresult rv = UnpackPDU(pdu, aArg1);
    if (NS_FAILED(rv)) {
      return rv;
    }
    rv = UnpackPDU(pdu, aArg2);
    if (NS_FAILED(rv)) {
      return rv;
    }
    rv = UnpackPDU(pdu, aArg3);
    if (NS_FAILED(rv)) {
      return rv;
    }
    rv = UnpackPDU(pdu, aArg4);
    if (NS_FAILED(rv)) {
      return rv;
    }
    WarnAboutTrailingData();
    return NS_OK;
  }

  template<typename T1, typename T2, typename T3, typename T4, typename T5>
  nsresult operator () (T1& aArg1, T2& aArg2, T3& aArg3, T4& aArg4,
                        T5& aArg5) const
  {
    BluetoothDaemonPDU& pdu = GetPDU();

    nsresult rv = UnpackPDU(pdu, aArg1);
    if (NS_FAILED(rv)) {
      return rv;
    }
    rv = UnpackPDU(pdu, aArg2);
    if (NS_FAILED(rv)) {
      return rv;
    }
    rv = UnpackPDU(pdu, aArg3);
    if (NS_FAILED(rv)) {
      return rv;
    }
    rv = UnpackPDU(pdu, aArg4);
    if (NS_FAILED(rv)) {
      return rv;
    }
    rv = UnpackPDU(pdu, aArg5);
    if (NS_FAILED(rv)) {
      return rv;
    }
    WarnAboutTrailingData();
    return NS_OK;
  }
};

END_BLUETOOTH_NAMESPACE

#endif