public void Serialize(Stream output)
{
var saveGame = this.SaveGame;
if (IsSupportedPlatform(this.Platform) == false)
{
throw new InvalidOperationException("unsupported platform");
}
var endian = this.Platform.GetEndian();
var compressionScheme = this.Platform.GetCompressionScheme();
byte[] innerUncompressedBytes;
using (var innerUncompressedData = new MemoryStream())
{
if (this.PlayerStats != null)
{
saveGame.StatsData = this.PlayerStats.Serialize(endian);
}
ProtoSerializer.Serialize(innerUncompressedData, saveGame);
innerUncompressedData.Position = 0;
innerUncompressedBytes = innerUncompressedData.ReadBytes((int)innerUncompressedData.Length);
}
byte[] innerCompressedBytes;
using (var innerCompressedData = new MemoryStream())
{
var hash = CRC32.Hash(innerUncompressedBytes, 0, innerUncompressedBytes.Length);
innerCompressedData.WriteValueS32(0, Endian.Big);
innerCompressedData.WriteString("WSG");
innerCompressedData.WriteValueU32(2, endian);
innerCompressedData.WriteValueU32(hash, endian);
innerCompressedData.WriteValueS32(innerUncompressedBytes.Length, endian);
var encoder = new Huffman.Encoder();
encoder.Build(innerUncompressedBytes);
innerCompressedData.WriteBytes(encoder.Encode(innerUncompressedBytes));
innerCompressedData.Position = 0;
innerCompressedData.WriteValueU32((uint)(innerCompressedData.Length - 4), Endian.Big);
innerCompressedData.Position = 0;
innerCompressedBytes = innerCompressedData.ReadBytes((int)innerCompressedData.Length);
}
byte[] compressedBytes;
if (innerCompressedBytes.Length <= BlockSize)
{
if (compressionScheme == CompressionScheme.LZO)
{
compressedBytes = new byte[innerCompressedBytes.Length +
(innerCompressedBytes.Length / 16) + 64 + 3];
var actualCompressedSize = compressedBytes.Length;
var result = MiniLZO.LZO.Compress(
innerCompressedBytes,
0,
innerCompressedBytes.Length,
compressedBytes,
0,
ref actualCompressedSize,
new MiniLZO.CompressWorkBuffer());
if (result != MiniLZO.ErrorCode.Success)
{
throw new SaveCorruptionException($"LZO compression failure ({result})");
}
Array.Resize(ref compressedBytes, actualCompressedSize);
}
else if (compressionScheme == CompressionScheme.Zlib)
{
using (var temp = new MemoryStream())
{
var zlib = new DeflaterOutputStream(temp);
zlib.WriteBytes(innerCompressedBytes);
zlib.Finish();
temp.Flush();
temp.Position = 0;
compressedBytes = temp.ReadBytes((int)temp.Length);
}
}
else
{
throw new InvalidOperationException("unsupported compression scheme");
}
}
else
{
if (compressionScheme == CompressionScheme.LZO)
{
int innerCompressedOffset = 0;
int innerCompressedSizeLeft = innerCompressedBytes.Length;
using (var blockData = new MemoryStream())
{
var blockCount = (innerCompressedSizeLeft + BlockSize) / BlockSize;
blockData.WriteValueS32(blockCount, Endian.Big);
blockData.Position = 4 + (blockCount * 8);
var blockInfos = new List <Tuple <uint, uint> >();
while (innerCompressedSizeLeft > 0)
{
var blockUncompressedSize = Math.Min(BlockSize, innerCompressedSizeLeft);
compressedBytes = new byte[blockUncompressedSize +
(blockUncompressedSize / 16) + 64 + 3];
var actualCompressedSize = compressedBytes.Length;
var result = MiniLZO.LZO.Compress(
innerCompressedBytes,
innerCompressedOffset,
blockUncompressedSize,
compressedBytes,
0,
ref actualCompressedSize,
new MiniLZO.CompressWorkBuffer());
if (result != MiniLZO.ErrorCode.Success)
{
throw new SaveCorruptionException($"LZO compression failure ({result})");
}
blockData.Write(compressedBytes, 0, actualCompressedSize);
blockInfos.Add(new Tuple <uint, uint>((uint)actualCompressedSize, BlockSize));
innerCompressedOffset += blockUncompressedSize;
innerCompressedSizeLeft -= blockUncompressedSize;
}
blockData.Position = 4;
foreach (var blockInfo in blockInfos)
{
blockData.WriteValueU32(blockInfo.Item1, Endian.Big);
blockData.WriteValueU32(blockInfo.Item2, Endian.Big);
}
blockData.Position = 0;
compressedBytes = blockData.ReadBytes((int)blockData.Length);
}
}
else if (compressionScheme == CompressionScheme.Zlib)
{
int innerCompressedOffset = 0;
int innerCompressedSizeLeft = innerCompressedBytes.Length;
using (var blockData = new MemoryStream())
{
var blockCount = (innerCompressedSizeLeft + BlockSize) / BlockSize;
blockData.WriteValueS32(blockCount, Endian.Big);
blockData.Position = 4 + (blockCount * 8);
var blockInfos = new List <Tuple <uint, uint> >();
while (innerCompressedSizeLeft > 0)
{
var blockUncompressedSize = Math.Min(BlockSize, innerCompressedSizeLeft);
using (var temp = new MemoryStream())
{
var zlib = new DeflaterOutputStream(temp);
zlib.Write(innerCompressedBytes, innerCompressedOffset, blockUncompressedSize);
zlib.Finish();
temp.Flush();
temp.Position = 0;
compressedBytes = temp.ReadBytes((int)temp.Length);
}
blockData.WriteBytes(compressedBytes);
blockInfos.Add(new Tuple <uint, uint>((uint)compressedBytes.Length, BlockSize));
innerCompressedOffset += blockUncompressedSize;
innerCompressedSizeLeft -= blockUncompressedSize;
}
blockData.Position = 4;
foreach (var blockInfo in blockInfos)
{
blockData.WriteValueU32(blockInfo.Item1, Endian.Big);
blockData.WriteValueU32(blockInfo.Item2, Endian.Big);
}
blockData.Position = 0;
compressedBytes = blockData.ReadBytes((int)blockData.Length);
}
}
else
{
throw new InvalidOperationException("unsupported platform");
}
}
byte[] uncompressedBytes;
using (var uncompressedData = new MemoryStream())
{
uncompressedData.WriteValueS32(innerCompressedBytes.Length, Endian.Big);
uncompressedData.WriteBytes(compressedBytes);
uncompressedData.Position = 0;
uncompressedBytes = uncompressedData.ReadBytes((int)uncompressedData.Length);
}
byte[] computedHash;
using (var sha1 = new System.Security.Cryptography.SHA1Managed())
{
computedHash = sha1.ComputeHash(uncompressedBytes);
}
output.WriteBytes(computedHash);
output.WriteBytes(uncompressedBytes);
}
public void Serialize(Stream output)
{
var saveGame = this.SaveGame;
if (IsSupportedPlatform(this.Platform) == false)
{
throw new InvalidOperationException("unsupported platform");
}
var endian = this.Platform.GetEndian();
var compressionScheme = this.Platform.GetCompressionScheme();
byte[] innerUncompressedBytes;
using (var innerUncompressedData = new MemoryStream())
{
if (this.PlayerStats != null)
{
saveGame.StatsData = this.PlayerStats.Serialize(endian);
}
ProtoSerializer.Serialize(innerUncompressedData, saveGame);
innerUncompressedData.Position = 0;
innerUncompressedBytes = innerUncompressedData.ReadBytes((int)innerUncompressedData.Length);
}
byte[] innerCompressedBytes;
using (var innerCompressedData = new MemoryStream())
{
var hash = CRC32.Hash(innerUncompressedBytes, 0, innerUncompressedBytes.Length);
if (compressionScheme != CompressionScheme.None)
{
innerCompressedData.WriteValueS32(0, Endian.Big);
}
innerCompressedData.WriteString("WSG");
innerCompressedData.WriteValueU32(2, endian);
innerCompressedData.WriteValueU32(hash, endian);
innerCompressedData.WriteValueS32(innerUncompressedBytes.Length, endian);
var encoder = new Huffman.Encoder();
encoder.Build(innerUncompressedBytes);
innerCompressedData.WriteBytes(encoder.Encode(innerUncompressedBytes));
if (compressionScheme != CompressionScheme.None)
{
innerCompressedData.Position = 0;
innerCompressedData.WriteValueU32((uint)(innerCompressedData.Length - 4), Endian.Big);
}
innerCompressedData.Position = 0;
innerCompressedBytes = innerCompressedData.ReadBytes((int)innerCompressedData.Length);
}
if (compressionScheme == CompressionScheme.None)
{
output.WriteBytes(innerCompressedBytes);
}
else
{
Wrap(output, innerCompressedBytes, compressionScheme);
}
}