suyu/src/core/hle/service/nvflinger/parcel.h
Morph 99ceb03a1c general: Convert source file copyright comments over to SPDX
This formats all copyright comments according to SPDX formatting guidelines.
Additionally, this resolves the remaining GPLv2 only licensed files by relicensing them to GPLv2.0-or-later.
2022-04-23 05:55:32 -04:00

172 lines
4.4 KiB
C++

// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
// SPDX-License-Identifier: GPL-3.0-or-later
#pragma once
#include <memory>
#include <vector>
#include "common/alignment.h"
#include "common/assert.h"
#include "common/common_types.h"
namespace Service::android {
class Parcel final {
public:
static constexpr std::size_t DefaultBufferSize = 0x40;
Parcel() : buffer(DefaultBufferSize) {}
template <typename T>
explicit Parcel(const T& out_data) : buffer(DefaultBufferSize) {
Write(out_data);
}
explicit Parcel(std::vector<u8> in_data) : buffer(std::move(in_data)) {
DeserializeHeader();
[[maybe_unused]] const std::u16string token = ReadInterfaceToken();
}
template <typename T>
void Read(T& val) {
static_assert(std::is_trivially_copyable_v<T>, "T must be trivially copyable.");
ASSERT(read_index + sizeof(T) <= buffer.size());
std::memcpy(&val, buffer.data() + read_index, sizeof(T));
read_index += sizeof(T);
read_index = Common::AlignUp(read_index, 4);
}
template <typename T>
T Read() {
T val;
Read(val);
return val;
}
template <typename T>
void ReadFlattened(T& val) {
const auto flattened_size = Read<s64>();
ASSERT(sizeof(T) == flattened_size);
Read(val);
}
template <typename T>
T ReadFlattened() {
T val;
ReadFlattened(val);
return val;
}
template <typename T>
T ReadUnaligned() {
static_assert(std::is_trivially_copyable_v<T>, "T must be trivially copyable.");
ASSERT(read_index + sizeof(T) <= buffer.size());
T val;
std::memcpy(&val, buffer.data() + read_index, sizeof(T));
read_index += sizeof(T);
return val;
}
template <typename T>
const std::shared_ptr<T> ReadObject() {
static_assert(std::is_trivially_copyable_v<T>, "T must be trivially copyable.");
const auto is_valid{Read<bool>()};
if (is_valid) {
auto result = std::make_shared<T>();
ReadFlattened(*result);
return result;
}
return {};
}
std::u16string ReadInterfaceToken() {
[[maybe_unused]] const u32 unknown = Read<u32>();
const u32 length = Read<u32>();
std::u16string token;
token.reserve(length + 1);
for (u32 ch = 0; ch < length + 1; ++ch) {
token.push_back(ReadUnaligned<u16>());
}
read_index = Common::AlignUp(read_index, 4);
return token;
}
template <typename T>
void Write(const T& val) {
static_assert(std::is_trivially_copyable_v<T>, "T must be trivially copyable.");
if (buffer.size() < write_index + sizeof(T)) {
buffer.resize(buffer.size() + sizeof(T) + DefaultBufferSize);
}
std::memcpy(buffer.data() + write_index, &val, sizeof(T));
write_index += sizeof(T);
write_index = Common::AlignUp(write_index, 4);
}
template <typename T>
void WriteObject(const T* ptr) {
static_assert(std::is_trivially_copyable_v<T>, "T must be trivially copyable.");
if (!ptr) {
Write<u32>(0);
return;
}
Write<u32>(1);
Write<s64>(sizeof(T));
Write(*ptr);
}
template <typename T>
void WriteObject(const std::shared_ptr<T> ptr) {
WriteObject(ptr.get());
}
void DeserializeHeader() {
ASSERT(buffer.size() > sizeof(Header));
Header header{};
std::memcpy(&header, buffer.data(), sizeof(Header));
read_index = header.data_offset;
}
std::vector<u8> Serialize() const {
ASSERT(read_index == 0);
Header header{};
header.data_size = static_cast<u32>(write_index - sizeof(Header));
header.data_offset = sizeof(Header);
header.objects_size = 4;
header.objects_offset = static_cast<u32>(sizeof(Header) + header.data_size);
std::memcpy(buffer.data(), &header, sizeof(Header));
return buffer;
}
private:
struct Header {
u32 data_size;
u32 data_offset;
u32 objects_size;
u32 objects_offset;
};
static_assert(sizeof(Header) == 16, "ParcelHeader has wrong size");
mutable std::vector<u8> buffer;
std::size_t read_index = 0;
std::size_t write_index = sizeof(Header);
};
} // namespace Service::android