mirror of
https://github.com/libretro/Mesen.git
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121 lines
3.2 KiB
C++
121 lines
3.2 KiB
C++
#include "stdafx.h"
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#include "SaveStateManager.h"
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#include "MessageManager.h"
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#include "Console.h"
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#include "../Utilities/FolderUtilities.h"
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#include "EmulationSettings.h"
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const uint32_t SaveStateManager::FileFormatVersion;
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atomic<uint32_t> SaveStateManager::_lastIndex(1);
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string SaveStateManager::GetStateFilepath(int stateIndex)
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{
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string folder = FolderUtilities::GetSaveStateFolder();
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string filename = FolderUtilities::GetFilename(Console::GetRomName(), false) + "_" + std::to_string(stateIndex) + ".mst";
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return FolderUtilities::CombinePath(folder, filename);
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}
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uint64_t SaveStateManager::GetStateInfo(int stateIndex)
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{
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string filepath = SaveStateManager::GetStateFilepath(stateIndex);
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ifstream file(filepath, ios::in | ios::binary);
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if(file) {
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file.close();
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return FolderUtilities::GetFileModificationTime(filepath);
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}
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return 0;
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}
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void SaveStateManager::MoveToNextSlot()
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{
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_lastIndex = (_lastIndex % MaxIndex) + 1;
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MessageManager::DisplayMessage("SaveStates", "SaveStateSlotSelected", std::to_string(_lastIndex));
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}
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void SaveStateManager::MoveToPreviousSlot()
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{
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_lastIndex = (_lastIndex == 1 ? SaveStateManager::MaxIndex : (_lastIndex - 1));
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MessageManager::DisplayMessage("SaveStates", "SaveStateSlotSelected", std::to_string(_lastIndex));
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}
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void SaveStateManager::SaveState()
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{
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SaveState(_lastIndex);
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}
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bool SaveStateManager::LoadState()
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{
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return LoadState(_lastIndex);
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}
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void SaveStateManager::SaveState(int stateIndex, bool displayMessage)
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{
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string filepath = SaveStateManager::GetStateFilepath(stateIndex);
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ofstream file(filepath, ios::out | ios::binary);
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if(file) {
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_lastIndex = stateIndex;
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Console::Pause();
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uint32_t emuVersion = EmulationSettings::GetMesenVersion();
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file.write("MST", 3);
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file.write((char*)&emuVersion, sizeof(emuVersion));
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file.write((char*)&SaveStateManager::FileFormatVersion, sizeof(uint32_t));
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Console::SaveState(file);
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Console::Resume();
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file.close();
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if(displayMessage) {
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MessageManager::DisplayMessage("SaveStates", "SaveStateSaved", std::to_string(stateIndex));
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}
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}
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}
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bool SaveStateManager::LoadState(int stateIndex)
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{
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string filepath = SaveStateManager::GetStateFilepath(stateIndex);
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ifstream file(filepath, ios::in | ios::binary);
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bool result = false;
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if(file) {
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char header[3];
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file.read(header, 3);
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if(memcmp(header, "MST", 3) == 0) {
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uint32_t emuVersion, fileFormatVersion;
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file.read((char*)&emuVersion, sizeof(emuVersion));
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if(emuVersion > EmulationSettings::GetMesenVersion()) {
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MessageManager::DisplayMessage("SaveStates", "SaveStateNewerVersion");
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return false;
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}
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file.read((char*)&fileFormatVersion, sizeof(fileFormatVersion));
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if(fileFormatVersion != SaveStateManager::FileFormatVersion) {
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MessageManager::DisplayMessage("SaveStates", "SaveStateIncompatibleVersion", std::to_string(stateIndex));
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return false;
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}
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_lastIndex = stateIndex;
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Console::Pause();
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Console::LoadState(file);
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Console::Resume();
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MessageManager::DisplayMessage("SaveStates", "SaveStateLoaded", std::to_string(stateIndex));
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result = true;
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} else {
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MessageManager::DisplayMessage("SaveStates", "SaveStateInvalidFile");
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}
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file.close();
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}
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if(!result) {
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MessageManager::DisplayMessage("SaveStates", "SaveStateEmpty");
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}
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return result;
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} |