/* -*- 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 "ipc/IPCMessageUtils.h" #include "mozilla/ErrorResult.h" #include "mozilla/Assertions.h" #include "mozilla/Move.h" #ifndef IPC_ErrorIPCUtils_h #define IPC_ErrorIPCUtils_h namespace IPC { template<> struct ParamTraits<mozilla::dom::ErrNum> : public ContiguousEnumSerializer<mozilla::dom::ErrNum, mozilla::dom::ErrNum(0), mozilla::dom::ErrNum(mozilla::dom::Err_Limit)> {}; template<> struct ParamTraits<mozilla::ErrorResult> { typedef mozilla::ErrorResult paramType; static void Write(Message* aMsg, const paramType& aParam) { // It should be the case that mMightHaveUnreportedJSException can only be // true when we're expecting a JS exception. We cannot send such messages // over the IPC channel since there is no sane way of transferring the JS // value over to the other side. Callers should never do that. MOZ_ASSERT_IF(aParam.IsJSException(), aParam.mMightHaveUnreportedJSException); if (aParam.IsJSException() #ifdef DEBUG || aParam.mMightHaveUnreportedJSException #endif ) { MOZ_CRASH("Cannot encode an ErrorResult representing a Javascript exception"); } WriteParam(aMsg, aParam.mResult); WriteParam(aMsg, aParam.IsErrorWithMessage()); WriteParam(aMsg, aParam.IsDOMException()); if (aParam.IsErrorWithMessage()) { aParam.SerializeMessage(aMsg); } else if (aParam.IsDOMException()) { aParam.SerializeDOMExceptionInfo(aMsg); } } static bool Read(const Message* aMsg, PickleIterator* aIter, paramType* aResult) { paramType readValue; if (!ReadParam(aMsg, aIter, &readValue.mResult)) { return false; } bool hasMessage = false; if (!ReadParam(aMsg, aIter, &hasMessage)) { return false; } bool hasDOMExceptionInfo = false; if (!ReadParam(aMsg, aIter, &hasDOMExceptionInfo)) { return false; } if (hasMessage && hasDOMExceptionInfo) { // Shouldn't have both! return false; } if (hasMessage && !readValue.DeserializeMessage(aMsg, aIter)) { return false; } else if (hasDOMExceptionInfo && !readValue.DeserializeDOMExceptionInfo(aMsg, aIter)) { return false; } *aResult = Move(readValue); return true; } }; } // namespace IPC #endif