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#include "skyrimsesavegame.h"
#ifdef _WIN32
#include <Windows.h>
#else
#include <QDateTime>
#include <QTimeZone>
// Windows ULARGE_INTEGER union for 64-bit FILETIME math
union _ULARGE_INTEGER {
struct {
uint32_t LowPart;
uint32_t HighPart;
};
uint64_t QuadPart;
};
// SYSTEMTIME is _SYSTEMTIME (defined in gamebryosavegame.h for Linux)
using SYSTEMTIME = _SYSTEMTIME;
// Portable FileTimeToSystemTime: converts Windows FILETIME to SYSTEMTIME
// FILETIME = 100ns intervals since Jan 1, 1601 UTC
static void FileTimeToSystemTime(const FILETIME* ft, SYSTEMTIME* st)
{
_ULARGE_INTEGER ull;
ull.LowPart = ft->dwLowDateTime;
ull.HighPart = ft->dwHighDateTime;
// 11644473600 seconds between 1601-01-01 and 1970-01-01 epochs
int64_t unixSecs = static_cast<int64_t>(ull.QuadPart / 10000000ULL) - 11644473600LL;
uint64_t remainderHns = ull.QuadPart % 10000000ULL; // leftover 100ns units
QDateTime dt = QDateTime::fromSecsSinceEpoch(unixSecs, QTimeZone::UTC);
QDate d = dt.date();
QTime t = dt.time();
st->wYear = static_cast<uint16_t>(d.year());
st->wMonth = static_cast<uint16_t>(d.month());
st->wDayOfWeek = static_cast<uint16_t>(d.dayOfWeek() % 7); // Qt Mon=1..Sun=7 → Win Sun=0..Sat=6
st->wDay = static_cast<uint16_t>(d.day());
st->wHour = static_cast<uint16_t>(t.hour());
st->wMinute = static_cast<uint16_t>(t.minute());
st->wSecond = static_cast<uint16_t>(t.second());
st->wMilliseconds = static_cast<uint16_t>(remainderHns / 10000);
}
#endif
SkyrimSESaveGame::SkyrimSESaveGame(QString const& fileName, GameSkyrimSE const* game)
: GamebryoSaveGame(fileName, game, true)
{
FileWrapper file(fileName, "TESV_SAVEGAME"); // 10bytes
uint32_t version;
FILETIME ftime;
fetchInformationFields(file, version, m_PCName, m_PCLevel, m_PCLocation, m_SaveNumber,
ftime);
// A file time is a 64-bit value that represents the number of 100-nanosecond
// intervals that have elapsed since 12:00 A.M. January 1, 1601 Coordinated Universal
// Time (UTC). So we need to convert that to something useful
// For some reason, the file time is off by about 6 hours.
// So we need to subtract those 6 hours from the filetime.
_ULARGE_INTEGER time;
time.LowPart = ftime.dwLowDateTime;
time.HighPart = ftime.dwHighDateTime;
time.QuadPart -= 216000000000ULL; // 6 hours in 100ns intervals
ftime.dwHighDateTime = time.HighPart;
ftime.dwLowDateTime = time.LowPart;
SYSTEMTIME ctime;
::FileTimeToSystemTime(&ftime, &ctime);
setCreationTime(ctime);
}
void SkyrimSESaveGame::fetchInformationFields(FileWrapper& file, uint32_t& version,
QString& playerName,
unsigned short& playerLevel,
QString& playerLocation,
uint32_t& saveNumber,
FILETIME& creationTime) const
{
uint32_t headerSize;
file.read(headerSize); // header size "TESV_SAVEGAME"
file.read(version);
file.read(saveNumber);
file.read(playerName);
uint32_t temp;
file.read(temp);
playerLevel = static_cast<unsigned short>(temp);
file.read(playerLocation);
QString timeOfDay;
file.read(timeOfDay);
QString race;
file.read(race); // race name (i.e. BretonRace)
file.skip<unsigned short>(); // Player gender (0 = male)
file.skip<float>(2); // experience gathered, experience required
file.read(creationTime); // filetime
}
std::unique_ptr<GamebryoSaveGame::DataFields> SkyrimSESaveGame::fetchDataFields() const
{
FileWrapper file(getFilepath(), "TESV_SAVEGAME"); // 10bytes
uint32_t version = 0;
{
QString dummyName, dummyLocation;
unsigned short dummyLevel;
uint32_t dummySaveNumber;
FILETIME dummyTime;
fetchInformationFields(file, version, dummyName, dummyLevel, dummyLocation,
dummySaveNumber, dummyTime);
}
std::unique_ptr<DataFields> fields = std::make_unique<DataFields>();
uint32_t width;
uint32_t height;
file.read(width);
file.read(height);
bool alpha = false;
// compatibility between LE and SE:
// SE has an additional uin16_t for compression
// SE uses an alpha channel, whereas LE does not
uint16_t compressionType = 0;
if (version == 12) {
file.read(compressionType);
alpha = true;
}
fields->Screenshot = file.readImage(width, height, 320, alpha);
file.setCompressionType(compressionType);
file.openCompressedData();
uint8_t saveGameVersion = file.readChar();
uint8_t pluginInfoSize = file.readChar();
uint16_t other = file.readShort(); // Unknown
fields->Plugins = file.readPlugins(1); // Just empty data
if (saveGameVersion >= 78) {
fields->LightPlugins = file.readLightPlugins();
}
file.closeCompressedData();
return fields;
}
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