/* -*- 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 "IPCMessageUtilsSpecializations.h"
#include "nsGkAtoms.h"
namespace IPC {
static const uint16_t kDynamicAtomToken = 0xffff;
static const uint16_t kAtomsCount =
static_cast<uint16_t>(mozilla::detail::GkAtoms::Atoms::AtomsCount);
static_assert(
static_cast<size_t>(
mozilla::detail::GkAtoms::Atoms::AtomsCount) == kAtomsCount,
"Number of static atoms must fit in a uint16_t");
static_assert(kDynamicAtomToken >= kAtomsCount,
"Exceeded supported number of static atoms");
/* static */
void ParamTraits<nsAtom*>::Write(MessageWriter* aWriter,
const nsAtom* aParam) {
MOZ_ASSERT(aParam);
if (aParam->IsStatic()) {
const nsStaticAtom* atom = aParam->AsStatic();
uint16_t index =
static_cast<uint16_t>(nsGkAtoms::IndexOf(atom));
MOZ_ASSERT(index < kAtomsCount);
WriteParam(aWriter, index);
return;
}
WriteParam(aWriter, kDynamicAtomToken);
nsDependentAtomString atomStr(aParam);
// nsDependentAtomString is serialized as its base, nsString, but we
// can be explicit about it.
nsString& str = atomStr;
WriteParam(aWriter, str);
}
/* static */
bool ParamTraits<nsAtom*>::Read(MessageReader* aReader,
RefPtr<nsAtom>* aResult) {
uint16_t token;
if (!ReadParam(aReader, &token)) {
return false;
}
if (token != kDynamicAtomToken) {
if (token >= kAtomsCount) {
return false;
}
*aResult = nsGkAtoms::GetAtomByIndex(token);
return true;
}
nsAutoString str;
if (!ReadParam(aReader,
static_cast<nsString*>(&str))) {
return false;
}
*aResult = NS_Atomize(str);
MOZ_ASSERT(*aResult);
return true;
}
}
// namespace IPC
