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Automatic save backup system

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From Zelda64Recomp/Zelda64Recomp#260 commit 4ebe71bfccbef17268c8941bed8d428d445268ca

Co-authored-by: Mr-Wiseguy <mrwiseguyromhacking@gmail.com>
This commit is contained in:
Reonu 2024-05-29 16:56:54 -04:00 • committed by angie
parent 6a10d4ed43
commit eb666c9e01
1 changed files with 27 additions and 5 deletions
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28
librecomp/src/pi.cpp
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@ -101,15 +101,30 @@ std::filesystem::path get_save_file_path() {
return config_path / save_folder / (std::u8string{recomp::current_game_id()} + u8".bin");
}
std::filesystem::path get_save_file_path_temp() {
return config_path / save_folder / (recomp::current_game_id() + u8".bin.temp");
}
std::filesystem::path get_save_file_path_backup() {
return config_path / save_folder / (recomp::current_game_id() + u8".bin.bak");
}
void update_save_file() {
std::ofstream save_file{ get_save_file_path(), std::ios_base::binary };
std::ofstream save_file{ get_save_file_path_temp(), std::ios_base::binary };
if (save_file.good()) {
std::lock_guard lock{ save_context.save_buffer_mutex };
save_file.write(save_context.save_buffer.data(), save_context.save_buffer.size());
if (std::filesystem::exists(get_save_file_path())) {
std::filesystem::rename(get_save_file_path(), get_save_file_path_backup());
} else {
fprintf(stderr, "Failed to save!\n");
std::exit(EXIT_FAILURE);
printf("\nSavefile doesn't exist. Skip renaming.\n");
}
std::filesystem::rename(get_save_file_path_temp(), get_save_file_path());
} else {
ultramodern::error_handling::message_box("Failed to write to the save file. Check your file permissions. If you have moved your appdata folder to Dropbox or similar, this can cause issues.");
// std::exit(EXIT_FAILURE);
}
}
@ -176,6 +191,7 @@ void save_clear(uint32_t start, uint32_t size, char value) {
void ultramodern::init_saving(RDRAM_ARG1) {
std::filesystem::path save_file_path = get_save_file_path();
std::filesystem::path save_file_path_backup = get_save_file_path_backup();
// Ensure the save file directory exists.
std::filesystem::create_directories(save_file_path.parent_path());
@ -184,10 +200,16 @@ void ultramodern::init_saving(RDRAM_ARG1) {
std::ifstream save_file{ save_file_path, std::ios_base::binary };
if (save_file.good()) {
save_file.read(save_context.save_buffer.data(), save_context.save_buffer.size());
} else {
// Reading the save file faield, so try to read the backup save file.
std::ifstream save_file_backup{ save_file_path_backup, std::ios_base::binary };
if (save_file_backup.good()) {
save_file_backup.read(save_context.save_buffer.data(), save_context.save_buffer.size());
} else {
// Otherwise clear the save file to all zeroes.
save_context.save_buffer.fill(0);
}
}
save_context.saving_thread = std::thread{saving_thread_func, PASS_RDRAM};
}