public void ExportToFile(string path)
{
using (FileStream sds = new FileStream(path, FileMode.Create, FileAccess.ReadWrite))
{
long currentPosition;
long blockTableOffsetPosition;
long xmlOffsetPosition;
long headerChecksumPosition;
sds.WriteString("SDS", sizeof(uint));
sds.WriteUInt32(Header.Version);
sds.WriteString(Header.Platform.ToString(), sizeof(uint));
using (MemoryStream ms = new MemoryStream())
{
ms.WriteString("SDS", sizeof(uint));
ms.WriteUInt32(Header.Version);
ms.WriteString(Header.Platform.ToString(), sizeof(uint));
sds.WriteUInt32(FNV.Hash32(ms.ReadAllBytes()));
}
Header.ResourceTypeTableOffset = SdsHeader.HeaderSize;
sds.WriteUInt32(Header.ResourceTypeTableOffset);
blockTableOffsetPosition = sds.Position;
sds.Seek(sizeof(uint), SeekOrigin.Current);
xmlOffsetPosition = sds.Position;
sds.Seek(sizeof(uint), SeekOrigin.Current);
sds.WriteUInt32(SlotRamRequired);
sds.WriteUInt32(SlotVRamRequired);
sds.WriteUInt32(OtherRamRequired);
sds.WriteUInt32(OtherVRamRequired);
sds.WriteUInt32(SdsHeader.Unknown32_2C);
sds.WriteUInt64((ulong)Header.GameVersion);
sds.Seek(sizeof(ulong), SeekOrigin.Current);
sds.WriteUInt32((uint)_resources.Count);
headerChecksumPosition = sds.Position;
sds.Seek(sizeof(uint), SeekOrigin.Current);
sds.WriteUInt32((uint)_resourceTypes.Count);
foreach (ResourceType resourceType in _resourceTypes)
{
sds.WriteUInt32(resourceType.Id);
sds.WriteUInt32((uint)resourceType.ToString().Length);
sds.WriteString(resourceType.ToString());
sds.WriteUInt32(resourceType.Unknown32);
}
currentPosition = sds.Position;
Header.BlockTableOffset = (uint)currentPosition;
sds.Seek(blockTableOffsetPosition, SeekOrigin.Begin);
sds.WriteUInt32((uint)currentPosition);
sds.Seek(currentPosition, SeekOrigin.Begin);
sds.WriteUInt32(UEzl);
if (Header?.Version == 19)
{
sds.WriteUInt32(MaxBlockSizeV19);
}
else if (Header?.Version == 20)
{
sds.WriteUInt32(MaxBlockSizeV20);
}
sds.WriteUInt8(4);
bool first = true;
int blockSize = Header?.Version == 19U ? MaxBlockSizeV19 : MaxBlockSizeV20;
foreach (MemoryStream block in MergeDataIntoBlocks(blockSize))
{
block.SeekToStart();
if ((first || block.Length >= 10240) && Header?.Version != 20U)
{
byte[] blockData = block.ReadAllBytes();
#region Version 19
if (Header?.Version == 19)
{
MemoryStream compressedBlock = new MemoryStream();
ZOutputStream compressStream = new ZOutputStream(compressedBlock,
zlibConst.Z_BEST_COMPRESSION);
compressStream.Write(blockData, 0, blockData.Length);
compressStream.finish();
sds.WriteUInt32((uint)compressStream.TotalOut + 32U);
sds.WriteUInt8((byte)EDataBlockType.Compressed);
sds.WriteUInt32((uint)block.Length);
sds.WriteUInt32(32);
sds.WriteUInt32(81920);
sds.WriteUInt32(135200769);
sds.WriteUInt32((uint)compressStream.TotalOut);
sds.WriteUInt64(0);
sds.WriteUInt32(0);
compressedBlock.SeekToStart();
sds.Write(compressedBlock.ReadAllBytes());
}
#endregion
#region Version 20
//else if (Header?.Version == 20)
//{
// byte[] compressed = Oodle.Compress(blockData, blockData.Length);
// sds.WriteUInt32((uint)compressed.Length + 128U);
// sds.WriteUInt8((byte)EDataBlockType.Compressed);
// sds.WriteUInt32((uint)block.Length);
// sds.WriteUInt32(128);
// sds.WriteUInt32(65537);
// sds.WriteUInt32((uint)block.Length);
// sds.WriteUInt32((uint)compressed.Length);
// sds.WriteUInt64(0);
// sds.WriteUInt64(0);
// sds.WriteUInt64(0);
// sds.WriteUInt64(0);
// sds.WriteUInt64(0);
// sds.WriteUInt64(0);
// sds.WriteUInt64(0);
// sds.WriteUInt64(0);
// sds.WriteUInt64(0);
// sds.WriteUInt64(0);
// sds.WriteUInt64(0);
// sds.WriteUInt64(0);
// sds.WriteUInt64(0);
// sds.WriteUInt32(0);
// sds.Write(compressed);
//}
#endregion
}
else
{
sds.WriteUInt32((uint)block.Length);
sds.WriteUInt8((byte)EDataBlockType.Uncompressed);
sds.Write(block.ReadAllBytes());
}
first = false;
}
sds.WriteUInt32(0);
sds.WriteUInt8(0);
if (Header?.Version == 20U)
{
Header.XmlOffset = 0;
sds.Seek(xmlOffsetPosition, SeekOrigin.Begin);
sds.WriteUInt32(Header.XmlOffset);
}
else
{
currentPosition = sds.Position;
Header.XmlOffset = (uint)currentPosition;
sds.Seek(xmlOffsetPosition, SeekOrigin.Begin);
sds.WriteUInt32((uint)currentPosition);
}
sds.Seek(headerChecksumPosition, SeekOrigin.Begin);
sds.WriteUInt32(FNV.Hash32(Header.ResourceTypeTableOffset, Header.BlockTableOffset, Header.XmlOffset, SlotRamRequired, SlotVRamRequired,
OtherRamRequired, OtherVRamRequired, SdsHeader.Unknown32_2C, (ulong)Header.GameVersion, 0UL, (uint)_resources.Count));
if (Header?.Version == 19U)
{
sds.Seek(currentPosition, SeekOrigin.Begin);
sds.WriteString(XmlString);
}
}
}
public static SdsHeader FromFile(string sdsFilePath)
{
SdsHeader header = new SdsHeader();
header.Name = Path.GetFileName(sdsFilePath);
using (FileStream fileStream = new FileStream(sdsFilePath, FileMode.Open, FileAccess.Read))
{
if (fileStream.Length < HeaderSize)
{
throw new InvalidDataException("Invalid file!");
}
if (fileStream.ReadString(sizeof(uint)) != "SDS")
{
throw new InvalidDataException("This file does not contain SDS header!");
}
header.Version = fileStream.ReadUInt32();
if (header.Version > MaxSupportedVersion)
{
throw new NotSupportedException($"Version {header.Version} not supported");
}
string platformString = fileStream.ReadString(sizeof(uint));
if (Enum.TryParse(platformString, out EPlatform platform))
{
header.Platform = platform;
}
else
{
throw new InvalidDataException(platformString);
}
if (header.Platform != EPlatform.PC) // In future will be added multiplatform support
{
throw new NotSupportedException($"Platform {platform} not supported");
}
uint hash = fileStream.ReadUInt32();
using (MemoryStream ms = new MemoryStream())
{
ms.WriteString("SDS", sizeof(uint));
ms.WriteUInt32(header.Version);
ms.WriteString(header.Platform.ToString(), sizeof(uint));
var computedHash = FNV.Hash32(ms.ReadAllBytes());
if (computedHash != hash)
{
throw new InvalidDataException("Checksum difference.");
}
}
header.ResourceTypeTableOffset = fileStream.ReadUInt32();
header.BlockTableOffset = fileStream.ReadUInt32();
header.XmlOffset = fileStream.ReadUInt32();
if (header.Version == 19U &&
header.XmlOffset == Encrypted)
{
throw new NotSupportedException("This SDS file is encrypted.");
}
uint slotRamRequired = fileStream.ReadUInt32();
uint slotVRamRequired = fileStream.ReadUInt32();
uint otherRamRequired = fileStream.ReadUInt32();
uint otherVRamRequired = fileStream.ReadUInt32();
if (fileStream.ReadUInt32() != SdsHeader.Unknown32_2C)
{
throw new Exception("Bytes do not match.");
}
header.GameVersion = (EGameVersion)fileStream.ReadUInt64();
if (header.GameVersion != EGameVersion.Classic && header.GameVersion != EGameVersion.DefinitiveEdition)
{
throw new NotSupportedException(header.GameVersion.ToString());
}
// Skipping of null bytes
fileStream.Seek(sizeof(ulong), SeekOrigin.Current);
uint numberOfFiles = fileStream.ReadUInt32();
uint checksum = fileStream.ReadUInt32();
uint calculatedChecksum = FNV.Hash32(header.ResourceTypeTableOffset, header.BlockTableOffset, header.XmlOffset, slotRamRequired,
slotVRamRequired, otherRamRequired, otherVRamRequired, Unknown32_2C, (ulong)header.GameVersion, 0UL, numberOfFiles);
if (calculatedChecksum != checksum)
{
throw new Exception("Checksum difference!");
}
}
return(header);
}
