/// <summary>
/// Loads a MPK file
/// </summary>
/// <param name="fname">The filename to load</param>
public void Load(string fname)
{
var fi = new FileInfo(fname);
if (!fi.Exists)
{
throw new FileNotFoundException("File does not exist", fname);
}
using (FileStream file = fi.OpenRead())
{
_buf = new byte[fi.Length];
file.Read(_buf, 0, _buf.Length);
}
_hdr = new MPKFileHeader {
Name = fname, UncompressedSize = (uint)fi.Length, TimeStamp = (uint)DateTime.Now.ToFileTime()
};
var def = new Deflater();
def.SetInput(_buf, 0, _buf.Length);
def.Finish();
// create temporary buffer
var tempbuffer = new byte[_buf.Length + _buf.Length / 5];
_hdr.CompressedSize = (uint)def.Deflate(tempbuffer, 0, tempbuffer.Length);
_compBuf = new byte[_hdr.CompressedSize];
Buffer.BlockCopy(tempbuffer, 0, _compBuf, 0, (int)_hdr.CompressedSize);
var crc = new Crc32();
crc.Update(_compBuf, 0, (int)_hdr.CompressedSize);
_hdr.CRC = crc;
}
/// <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);
}
}
}
}
/// <summary>
/// Constructs a new MPK file entry
/// </summary>
/// <param name="compData">The compressed data of this file entry</param>
/// <param name="data">The uncompressed data of this file entry</param>
/// <param name="hdr">The file entry header</param>
public MPKFile(byte[] compData, byte[] data, MPKFileHeader hdr)
{
_compBuf = compData;
_buf = data;
_hdr = hdr;
}
/// <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);
}
}
}
}
/// <summary>
/// Constructs a new MPK file entry
/// </summary>
/// <param name="compData">The compressed data of this file entry</param>
/// <param name="data">The uncompressed data of this file entry</param>
/// <param name="hdr">The file entry header</param>
public MPKFile(byte[] compData, byte[] data, MPKFileHeader hdr)
{
_compBuf = compData;
_buf = data;
_hdr = hdr;
}
/// <summary>
/// Loads a MPK file
/// </summary>
/// <param name="fname">The filename to load</param>
public void Load(string fname)
{
var fi = new FileInfo(fname);
if (!fi.Exists)
{
throw new FileNotFoundException("File does not exist", fname);
}
using (FileStream file = fi.OpenRead())
{
_buf = new byte[fi.Length];
file.Read(_buf, 0, _buf.Length);
}
_hdr = new MPKFileHeader { Name = fname, UncompressedSize = (uint)fi.Length, TimeStamp = (uint)DateTime.Now.ToFileTime() };
var def = new Deflater();
def.SetInput(_buf, 0, _buf.Length);
def.Finish();
// create temporary buffer
var tempbuffer = new byte[_buf.Length + _buf.Length / 5];
_hdr.CompressedSize = (uint)def.Deflate(tempbuffer, 0, tempbuffer.Length);
_compBuf = new byte[_hdr.CompressedSize];
Buffer.BlockCopy(tempbuffer, 0, _compBuf, 0, (int)_hdr.CompressedSize);
var crc = new Crc32();
crc.Update(_compBuf, 0, (int)_hdr.CompressedSize);
_hdr.CRC = crc;
}
