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https://github.com/citra-mirror/citra.git
synced 2024-08-20 18:33:24 +02:00
CFG: Refactored how the config file works.
It is now kept in memory as per 3dbrew, all updates happen on memory, then they can be saved using UpdateConfigNANDSavegame.
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462740278d
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@ -18,7 +18,7 @@ namespace FileSys {
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Archive_SystemSaveData::Archive_SystemSaveData(const std::string& mount_point, u64 save_id)
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: DiskArchive(Common::StringFromFormat("%s%08X/%08X/", mount_point.c_str(),
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static_cast<u32>(save_id & 0xFFFFFFFF), static_cast<u32>((save_id >> 31) & 0xFFFFFFFF))) {
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static_cast<u32>(save_id & 0xFFFFFFFF), static_cast<u32>((save_id >> 32) & 0xFFFFFFFF))) {
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LOG_INFO(Service_FS, "Directory %s set as SystemSaveData.", this->mount_point.c_str());
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}
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@ -13,17 +13,6 @@
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namespace CFG_U {
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static std::unique_ptr<FileSys::Archive_SystemSaveData> cfg_system_save_data;
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static const u64 CFG_SAVE_ID = 0x00010017;
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static const u64 CONSOLE_UNIQUE_ID = 0xDEADC0DE;
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/// TODO(Subv): Find out what this actually is
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/// Thanks Normmatt for providing this information
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static const u8 STEREO_CAMERA_SETTINGS[32] = {
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0x00, 0x00, 0x78, 0x42, 0x00, 0x80, 0x90, 0x43, 0x9A, 0x99, 0x99, 0x42, 0xEC, 0x51, 0x38, 0x42,
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0x00, 0x00, 0x20, 0x41, 0x00, 0x00, 0xA0, 0x40, 0xEC, 0x51, 0x5E, 0x42, 0x5C, 0x8F, 0xAC, 0x41
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};
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enum SystemModel {
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NINTENDO_3DS,
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NINTENDO_3DS_XL,
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@ -32,6 +21,20 @@ enum SystemModel {
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NEW_NINTENDO_3DS_XL
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};
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static std::unique_ptr<FileSys::Archive_SystemSaveData> cfg_system_save_data;
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static const u64 CFG_SAVE_ID = 0x00010017;
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static const u64 CONSOLE_UNIQUE_ID = 0xDEADC0DE;
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static const u32 CONSOLE_MODEL = NINTENDO_3DS_XL;
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static const u32 CONFIG_SAVEFILE_SIZE = 0x8000;
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static std::array<u8, CONFIG_SAVEFILE_SIZE> cfg_config_file_buffer = { };
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/// TODO(Subv): Find out what this actually is
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/// Thanks Normmatt for providing this information
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static const u8 STEREO_CAMERA_SETTINGS[32] = {
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0x00, 0x00, 0x78, 0x42, 0x00, 0x80, 0x90, 0x43, 0x9A, 0x99, 0x99, 0x42, 0xEC, 0x51, 0x38, 0x42,
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0x00, 0x00, 0x20, 0x41, 0x00, 0x00, 0xA0, 0x40, 0xEC, 0x51, 0x5E, 0x42, 0x5C, 0x8F, 0xAC, 0x41
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};
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// TODO(Link Mauve): use a constexpr once MSVC starts supporting it.
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#define C(code) ((code)[0] | ((code)[1] << 8))
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@ -134,9 +137,11 @@ struct SaveFileConfig {
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u16 total_entries;
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u16 data_entries_offset;
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SaveConfigBlockEntry block_entries[1479];
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u32 unknown;
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};
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/* Reads a block with the specified id and flag from the Config savegame file
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/**
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* Reads a block with the specified id and flag from the Config savegame buffer
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* and writes the output to output.
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* The input size must match exactly the size of the requested block
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* TODO(Subv): This should actually be in some file common to the CFG process
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@ -147,41 +152,128 @@ struct SaveFileConfig {
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* @returns ResultCode indicating the result of the operation, 0 on success
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*/
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ResultCode GetConfigInfoBlock(u32 block_id, u32 size, u32 flag, u8* output) {
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FileSys::Mode mode;
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mode.hex = 0;
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mode.read_flag = 1;
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FileSys::Path path("config");
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auto file = cfg_system_save_data->OpenFile(path, mode);
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_dbg_assert_msg_(Service_CFG, file != nullptr, "Could not open the CFG service config file");
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SaveFileConfig config;
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size_t read = file->Read(0, sizeof(SaveFileConfig), reinterpret_cast<u8*>(&config));
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// Read the header
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SaveFileConfig* config = reinterpret_cast<SaveFileConfig*>(cfg_config_file_buffer.data());
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if (read != sizeof(SaveFileConfig)) {
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LOG_CRITICAL(Service_CFG, "The config savefile is corrupted");
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return ResultCode(-1); // TODO(Subv): Find the correct error code
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}
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auto itr = std::find_if(std::begin(config.block_entries), std::end(config.block_entries),
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auto itr = std::find_if(std::begin(config->block_entries), std::end(config->block_entries),
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[&](SaveConfigBlockEntry const& entry) {
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return entry.block_id == block_id && entry.size == size && (entry.flags & flag);
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});
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if (itr == std::end(config.block_entries)) {
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LOG_TRACE(Service_CFG, "Config block %u with size %u and flags %u not found", block_id, size, flag);
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if (itr == std::end(config->block_entries)) {
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LOG_ERROR(Service_CFG, "Config block %u with size %u and flags %u not found", block_id, size, flag);
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return ResultCode(-1); // TODO(Subv): Find the correct error code
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}
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// The data is located in the block header itself if the size is less than 4 bytes
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if (itr->size <= 4) {
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if (itr->size <= 4)
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memcpy(output, &itr->offset_or_data, itr->size);
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} else {
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size_t data_read = file->Read(itr->offset_or_data, itr->size, output);
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if (data_read != itr->size) {
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LOG_CRITICAL(Service_CFG, "The config savefile is corrupted");
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return ResultCode(-1); // TODO(Subv): Find the correct error code
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else
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memcpy(output, &cfg_config_file_buffer[config->data_entries_offset + itr->offset_or_data], itr->size);
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return RESULT_SUCCESS;
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}
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/**
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* Creates a block with the specified id and writes the input data to the cfg savegame buffer in memory.
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* The config savegame file in the filesystem is not updated.
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* TODO(Subv): This should actually be in some file common to the CFG process
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* @param block_id The id of the block we want to create
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* @param size The size of the block we want to create
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* @param flag The flags of the new block
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* @param data A pointer containing the data we will write to the new block
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* @returns ResultCode indicating the result of the operation, 0 on success
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*/
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ResultCode CreateConfigInfoBlk(u32 block_id, u32 size, u32 flags, u8 const* data) {
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SaveFileConfig* config = reinterpret_cast<SaveFileConfig*>(cfg_config_file_buffer.data());
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// Insert the block header with offset 0 for now
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config->block_entries[config->total_entries] = { block_id, 0, size, flags };
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if (size > 4) {
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s32 total_entries = config->total_entries - 1;
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u32 offset = 0;
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// Perform a search to locate the next offset for the new data
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while (total_entries >= 0) {
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// Ignore the blocks that don't have a separate data offset
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if (config->block_entries[total_entries].size <= 4) {
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--total_entries;
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continue;
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}
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offset = config->block_entries[total_entries].offset_or_data +
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config->block_entries[total_entries].size;
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break;
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}
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config->block_entries[config->total_entries].offset_or_data = offset;
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// Write the data at the new offset
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memcpy(&cfg_config_file_buffer[config->data_entries_offset + offset], data, size);
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} else {
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// The offset_or_data field in the header contains the data itself if it's 4 bytes or less
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memcpy(&config->block_entries[config->total_entries].offset_or_data, data, size);
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}
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++config->total_entries;
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return RESULT_SUCCESS;
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}
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/**
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* Deletes the config savegame file from the filesystem, the buffer in memory is not affected
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* TODO(Subv): This should actually be in some file common to the CFG process
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* @returns ResultCode indicating the result of the operation, 0 on success
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*/
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ResultCode DeleteConfigNANDSaveFile() {
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FileSys::Path path("config");
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if (cfg_system_save_data->DeleteFile(path))
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return RESULT_SUCCESS;
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return ResultCode(-1); // TODO(Subv): Find the right error code
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}
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/**
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* Writes the config savegame memory buffer to the config savegame file in the filesystem
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* TODO(Subv): This should actually be in some file common to the CFG process
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* @returns ResultCode indicating the result of the operation, 0 on success
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*/
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ResultCode UpdateConfigNANDSavegame() {
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FileSys::Mode mode;
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mode.hex = 0;
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mode.write_flag = 1;
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mode.create_flag = 1;
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FileSys::Path path("config");
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auto file = cfg_system_save_data->OpenFile(path, mode);
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_dbg_assert_msg_(Service_CFG, file != nullptr, "could not open file");
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file->Write(0, CONFIG_SAVEFILE_SIZE, 1, cfg_config_file_buffer.data());
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return RESULT_SUCCESS;
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}
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/**
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* Re-creates the config savegame file in memory and the filesystem with the default blocks
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* TODO(Subv): This should actually be in some file common to the CFG process
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* @returns ResultCode indicating the result of the operation, 0 on success
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*/
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ResultCode FormatConfig() {
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ResultCode res = DeleteConfigNANDSaveFile();
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if (!res.IsSuccess())
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return res;
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// Delete the old data
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std::fill(cfg_config_file_buffer.begin(), cfg_config_file_buffer.end(), 0);
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// Create the header
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SaveFileConfig* config = reinterpret_cast<SaveFileConfig*>(cfg_config_file_buffer.data());
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config->data_entries_offset = 0x455C;
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// Insert the default blocks
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res = CreateConfigInfoBlk(0x00050005, 0x20, 0xE, STEREO_CAMERA_SETTINGS);
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if (!res.IsSuccess())
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return res;
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res = CreateConfigInfoBlk(0x00090001, 0x8, 0xE, reinterpret_cast<u8 const*>(&CONSOLE_UNIQUE_ID));
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if (!res.IsSuccess())
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return res;
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res = CreateConfigInfoBlk(0x000F0004, 0x4, 0x8, reinterpret_cast<u8 const*>(&CONSOLE_MODEL));
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if (!res.IsSuccess())
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return res;
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// Save the buffer to the file
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res = UpdateConfigNANDSavegame();
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if (!res.IsSuccess())
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return res;
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return RESULT_SUCCESS;
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}
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@ -271,6 +363,8 @@ Interface::Interface() {
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return;
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}
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// TODO(Subv): All this code should be moved to cfg:i,
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// it's only here because we do not currently emulate the lower level code that uses that service
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// Try to open the file in read-only mode to check its existence
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FileSys::Mode mode;
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mode.hex = 0;
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@ -282,30 +376,7 @@ Interface::Interface() {
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if (file != nullptr)
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return;
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mode.create_flag = 1;
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mode.write_flag = 1;
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mode.read_flag = 0;
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// Re-open the file in write-create mode
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file = cfg_system_save_data->OpenFile(path, mode);
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// Setup the default config file data header
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SaveFileConfig config = { 3, 0, {} };
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u32 offset = sizeof(SaveFileConfig);
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// Console-unique ID
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config.block_entries[0] = { 0x00090001, offset, 0x8, 0xE };
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offset += 0x8;
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// Stereo Camera Settings?
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config.block_entries[1] = { 0x00050005, offset, 0x20, 0xE };
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offset += 0x20;
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// System Model (Nintendo 3DS XL)
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config.block_entries[2] = { 0x000F0004, NINTENDO_3DS_XL, 0x4, 0x8 };
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// Write the config file data header to the config file
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file->Write(0, sizeof(SaveFileConfig), 1, reinterpret_cast<u8*>(&config));
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// Write the data itself
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file->Write(config.block_entries[0].offset_or_data, 0x8, 1,
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reinterpret_cast<u8 const*>(&CONSOLE_UNIQUE_ID));
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file->Write(config.block_entries[1].offset_or_data, 0x20, 1, STEREO_CAMERA_SETTINGS);
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FormatConfig();
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}
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Interface::~Interface() {
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