156 lines
3.7 KiB
C++
156 lines
3.7 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef MOZILLA_PARAMTRAITS_STL_H
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#define MOZILLA_PARAMTRAITS_STL_H
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#include "ipc/IPCMessageUtils.h"
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#include "mozilla/ipc/IPDLParamTraits.h"
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#include <memory>
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namespace IPC {
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template <typename U, size_t N>
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struct ParamTraits<std::array<U, N>> final {
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using T = std::array<U, N>;
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static void Write(MessageWriter* const writer, const T& in) {
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for (const auto& v : in) {
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WriteParam(writer, v);
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}
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}
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static bool Read(MessageReader* const reader, T* const out) {
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for (auto& v : *out) {
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if (!ReadParam(reader, &v)) return false;
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}
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return true;
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}
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};
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// -
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template <typename U, size_t N>
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struct ParamTraits<U[N]> final {
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using T = U[N];
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static constexpr size_t kByteSize = sizeof(U) * N;
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static_assert(std::is_trivial<U>::value);
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static void Write(MessageWriter* const writer, const T& in) {
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writer->WriteBytes(in, kByteSize);
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}
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static bool Read(MessageReader* const reader, T* const out) {
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if (!reader->HasBytesAvailable(kByteSize)) {
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return false;
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}
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return reader->ReadBytesInto(*out, kByteSize);
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}
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};
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// -
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template <class U>
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struct ParamTraits<std::optional<U>> final {
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using T = std::optional<U>;
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static void Write(MessageWriter* const writer, const T& in) {
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WriteParam(writer, bool{in});
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if (in) {
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WriteParam(writer, *in);
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}
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}
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static bool Read(MessageReader* const reader, T* const out) {
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bool isSome;
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if (!ReadParam(reader, &isSome)) return false;
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if (!isSome) {
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out->reset();
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return true;
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}
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out->emplace();
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return ReadParam(reader, &**out);
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}
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};
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// -
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template <class A, class B>
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struct ParamTraits<std::pair<A, B>> final {
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using T = std::pair<A, B>;
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static void Write(MessageWriter* const writer, const T& in) {
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WriteParam(writer, in.first);
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WriteParam(writer, in.second);
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}
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static bool Read(MessageReader* const reader, T* const out) {
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bool ok = true;
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ok = ok && ReadParam(reader, &out->first);
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ok = ok && ReadParam(reader, &out->second);
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return ok;
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}
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};
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// -
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template <class K, class V, class H, class E>
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struct ParamTraits<std::unordered_map<K, V, H, E>> final {
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using T = std::unordered_map<K, V, H, E>;
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static void Write(MessageWriter* const writer, const T& in) {
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const auto size = uint64_t{in.size()};
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WriteParam(writer, size);
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for (const auto& pair : in) {
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WriteParam(writer, pair);
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}
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}
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static bool Read(MessageReader* const reader, T* const out) {
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out->clear();
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auto size = uint64_t{};
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if (!ReadParam(reader, &size)) return false;
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out->reserve(static_cast<size_t>(size));
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for (const auto i : mozilla::IntegerRange(size)) {
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(void)i;
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auto pair = std::pair<K, V>{};
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if (!ReadParam(reader, &pair)) return false;
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out->insert(pair);
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}
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return true;
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}
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};
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// -
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// template <class... T>
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// struct ParamTraits<std::tuple<T...>> final {
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// using T = std::tuple<T...>;
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//
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// static void Write(MessageWriter* const writer, const T& in) {
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// mozilla::MapTuple(aArg, [&](const auto& field) {
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// WriteParam(writer, field);
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// return true; // ignored
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// });
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// }
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//
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// static bool Read(MessageReader* const reader, T* const out) {
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// bool ok = true;
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// mozilla::MapTuple(*aArg, [&](auto& field) {
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// ok = ok && ReadParam(reader, &field);
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// return true; // ignored
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// });
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// return ok;
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// }
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// };
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} // namespace IPC
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#endif
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