dom/ipc/PermissionMessageUtils.cpp
author André Bargull <andre.bargull@gmail.com>
Fri, 17 Aug 2018 14:30:37 -0700
changeset 432230 fd8d17192696250a5396894301478f36c6c75be7
parent 412765 30c42e2e0944275bc5cdce3ef9cc1180ad4f37df
child 448947 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1346211 - Part 7: Clobber after modifying ICU data file. r=clobber

/* -*- 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 "mozilla/dom/PermissionMessageUtils.h"
#include "nsISerializable.h"
#include "nsSerializationHelper.h"

namespace IPC {

void
ParamTraits<nsIPrincipal>::Write(Message* aMsg, nsIPrincipal* aParam)
{
  bool isNull = !aParam;
  WriteParam(aMsg, isNull);
  if (isNull) {
    return;
  }

  nsCString principalString;
  nsresult rv = NS_SerializeToString(aParam, principalString);
  if (NS_FAILED(rv)) {
    MOZ_CRASH("Unable to serialize principal.");
    return;
  }

  WriteParam(aMsg, principalString);
}

bool
ParamTraits<nsIPrincipal>::Read(const Message* aMsg,
                                PickleIterator* aIter,
                                RefPtr<nsIPrincipal>* aResult)
{
  bool isNull;
  if (!ReadParam(aMsg, aIter, &isNull)) {
    return false;
  }

  if (isNull) {
    *aResult = nullptr;
    return true;
  }

  nsCString principalString;
  if (!ReadParam(aMsg, aIter, &principalString)) {
    return false;
  }

  nsCOMPtr<nsISupports> iSupports;
  nsresult rv = NS_DeserializeObject(principalString, getter_AddRefs(iSupports));
  NS_ENSURE_SUCCESS(rv, false);

  nsCOMPtr<nsIPrincipal> principal = do_QueryInterface(iSupports);
  NS_ENSURE_TRUE(principal, false);

  *aResult = principal.forget();
  return true;
}

} // namespace IPC