/// <summary>
/// Reads a null-terminated string from the stream
/// </summary>
/// <param name="maxlen">Maximum number of bytes to read in</param>
/// <returns>A string of maxlen or less</returns>
public virtual string ReadString(int maxlen)
{
var buf = new byte[maxlen];
Read(buf, 0, maxlen);
return(Marshal.ConvertToString(buf));
}
public override void ApplyToFieldInfo(FieldInfo Info, ISerializablePacket Packet, Type Field)
{
if (Field.Equals(typeof(byte[])))
{
Info.SetValue(Packet, val);
}
else if (Field.Equals(typeof(string)))
{
Info.SetValue(Packet, Marshal.ConvertToString((byte[])val));
}
}
public string GetString()
{
if (val is byte[])
{
return(Marshal.ConvertToString(val as byte[]));
}
else if (val is string)
{
return((string)val);
}
return("");
}
/// <summary>
/// Reads a new MPK header from a binary reader
/// </summary>
/// <param name="rdr">The binary reader pointing to the MPK header</param>
public void Read(BinaryReader rdr)
{
var buf = new byte[256];
rdr.Read(buf, 0, 256);
_name = Marshal.ConvertToString(buf);
_timestamp = rdr.ReadUInt32();
_unk = rdr.ReadInt32();
_offset = rdr.ReadUInt32();
_uncompressedSize = rdr.ReadUInt32();
_directoryOffset = rdr.ReadUInt32();
_compressedSize = rdr.ReadUInt32();
_crc.Value = rdr.ReadUInt32();
}
/// <summary>
/// Reads a MPK from a binary reader
/// </summary>
/// <param name="rdr">The binary reader pointing to the MPK</param>
private void ReadArchive(BinaryReader rdr)
{
_files.Clear();
_crc.Value = 0;
_sizeDir = 0;
_sizeName = 0;
_numFiles = 0;
var buf = new byte[16];
rdr.Read(buf, 0, 16);
for (byte i = 0; i < 16; ++i)
{
buf[i] ^= i;
}
_crc.Value = (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
_sizeDir = (buf[4] << 24) | (buf[5] << 16) | (buf[6] << 8) | buf[7];
_sizeName = (buf[8] << 24) | (buf[9] << 16) | (buf[10] << 8) | buf[11];
_numFiles = (buf[12] << 24) | (buf[13] << 16) | (buf[14] << 8) | buf[15];
buf = new byte[_sizeName];
rdr.Read(buf, 0, _sizeName);
var inf = new Inflater();
inf.SetInput(buf);
buf = new byte[1024];
inf.Inflate(buf);
buf[inf.TotalOut] = 0;
_name = Marshal.ConvertToString(buf);
long totalin = 0;
buf = ReadDirectory(rdr, ref totalin);
using (var directory = new MemoryStream(buf))
{
long pos = rdr.BaseStream.Position;
long len = rdr.BaseStream.Seek(0, SeekOrigin.End);
rdr.BaseStream.Position = pos;
buf = new byte[len - pos];
rdr.Read(buf, 0, buf.Length);
using (var files = new MemoryStream(buf))
{
rdr.BaseStream.Position = pos - totalin;
buf = new byte[totalin];
rdr.Read(buf, 0, buf.Length);
var crc = new Crc32();
crc.Reset();
crc.Update(buf);
if (crc.Value != _crc.Value)
{
throw new Exception("Invalid or corrupt MPK");
}
while (directory.Position < directory.Length && files.Position < files.Length)
{
crc.Reset();
buf = new byte[MPKFileHeader.MaxSize];
directory.Read(buf, 0, MPKFileHeader.MaxSize);
MPKFileHeader hdr;
using (var hdrStream = new MemoryStream(buf))
{
using (var hdrRdr = new BinaryReader(hdrStream, Encoding.UTF8))
{
hdr = new MPKFileHeader(hdrRdr);
}
}
var compbuf = new byte[hdr.CompressedSize];
files.Read(compbuf, 0, compbuf.Length);
crc.Update(compbuf, 0, compbuf.Length);
inf.Reset();
inf.SetInput(compbuf, 0, compbuf.Length);
buf = new byte[hdr.UncompressedSize];
inf.Inflate(buf, 0, buf.Length);
var file = new MPKFile(compbuf, buf, hdr);
if (crc.Value != hdr.CRC.Value)
{
OnInvalidFile(file);
continue;
}
_files.Add(hdr.Name.ToLower(), file);
}
}
}
}
