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namespace LibTSforge.PhysicalStore
{
using System;
using System.Collections.Generic;
using System.IO;
public enum CRCBlockType : uint
{
UINT = 1 << 0,
STRING = 1 << 1,
BINARY = 1 << 2
}
public abstract class CRCBlock
{
public CRCBlockType DataType;
public byte[] Key;
public string KeyAsStr
{
get
{
return Utils.DecodeString(Key);
}
set
{
Key = Utils.EncodeString(value);
}
}
public byte[] Value;
public string ValueAsStr
{
get
{
return Utils.DecodeString(Value);
}
set
{
Value = Utils.EncodeString(value);
}
}
public uint ValueAsInt
{
get
{
return BitConverter.ToUInt32(Value, 0);
}
set
{
Value = BitConverter.GetBytes(value);
}
}
public abstract void Encode(BinaryWriter writer);
public abstract void Decode(BinaryReader reader);
public abstract uint CRC();
}
public class CRCBlockVista : CRCBlock
{
public override void Encode(BinaryWriter writer)
{
uint crc = CRC();
writer.Write((uint)DataType);
writer.Write(0);
writer.Write(Key.Length);
writer.Write(Value.Length);
writer.Write(crc);
writer.Write(Key);
writer.Write(Value);
}
public override void Decode(BinaryReader reader)
{
uint type = reader.ReadUInt32();
uint lenName = reader.ReadUInt32();
uint lenVal = reader.ReadUInt32();
uint crc = reader.ReadUInt32();
byte[] key = reader.ReadBytes((int)lenName);
byte[] value = reader.ReadBytes((int)lenVal);
DataType = (CRCBlockType)type;
Key = key;
Value = value;
if (CRC() != crc)
{
throw new InvalidDataException("Invalid CRC in variable bag.");
}
}
public override uint CRC()
{
return Utils.CRC32(Value);
}
}
public class CRCBlockModern : CRCBlock
{
public override void Encode(BinaryWriter writer)
{
uint crc = CRC();
writer.Write(crc);
writer.Write((uint)DataType);
writer.Write(Key.Length);
writer.Write(Value.Length);
writer.Write(Key);
writer.Align(8);
writer.Write(Value);
writer.Align(8);
}
public override void Decode(BinaryReader reader)
{
uint crc = reader.ReadUInt32();
uint type = reader.ReadUInt32();
uint lenName = reader.ReadUInt32();
uint lenVal = reader.ReadUInt32();
byte[] key = reader.ReadBytes((int)lenName);
reader.Align(8);
byte[] value = reader.ReadBytes((int)lenVal);
reader.Align(8);
DataType = (CRCBlockType)type;
Key = key;
Value = value;
if (CRC() != crc)
{
throw new InvalidDataException("Invalid CRC in variable bag.");
}
}
public override uint CRC()
{
BinaryWriter wtemp = new BinaryWriter(new MemoryStream());
wtemp.Write(0);
wtemp.Write((uint)DataType);
wtemp.Write(Key.Length);
wtemp.Write(Value.Length);
wtemp.Write(Key);
wtemp.Write(Value);
return Utils.CRC32(wtemp.GetBytes());
}
}
public class VariableBag
{
public List<CRCBlock> Blocks = new List<CRCBlock>();
private readonly PSVersion Version;
private void Deserialize(byte[] data)
{
int len = data.Length;
BinaryReader reader = new BinaryReader(new MemoryStream(data));
while (reader.BaseStream.Position < len - 0x10)
{
CRCBlock block;
if (Version == PSVersion.Vista)
{
block = new CRCBlockVista();
}
else
{
block = new CRCBlockModern();
}
block.Decode(reader);
Blocks.Add(block);
}
}
public byte[] Serialize()
{
BinaryWriter writer = new BinaryWriter(new MemoryStream());
foreach (CRCBlock block in Blocks)
{
if (Version == PSVersion.Vista)
{
((CRCBlockVista)block).Encode(writer);
} else
{
((CRCBlockModern)block).Encode(writer);
}
}
return writer.GetBytes();
}
public CRCBlock GetBlock(string key)
{
foreach (CRCBlock block in Blocks)
{
if (block.KeyAsStr == key)
{
return block;
}
}
return null;
}
public void SetBlock(string key, byte[] value)
{
for (int i = 0; i < Blocks.Count; i++)
{
CRCBlock block = Blocks[i];
if (block.KeyAsStr == key)
{
block.Value = value;
Blocks[i] = block;
break;
}
}
}
public void DeleteBlock(string key)
{
foreach (CRCBlock block in Blocks)
{
if (block.KeyAsStr == key)
{
Blocks.Remove(block);
return;
}
}
}
public VariableBag(byte[] data, PSVersion version)
{
Version = version;
Deserialize(data);
}
public VariableBag(PSVersion version)
{
Version = version;
}
}
}
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