public PackObject GetObjectWithOffset(GitObjectReader reader, int uncompressedSize)
{
Debug.WriteLine("Fetching object with offset: {0}".FormatWith(reader.Position));
// Read first byte, it contains the type and 4 bits of object length
byte buffer = reader.ReadByte();
ObjectType type = (ObjectType)((buffer >> 4) & 7);
long size = buffer & 0xf;
// Read byte while 8th bit is 1.
int bitCount = 4;
while ((buffer & 0x80) != 0) // >> 7 == 1);
{
buffer = reader.ReadByte();
size |= ((long)buffer & 0x7f) << bitCount;
bitCount += 7;
}
if (type == ObjectType.RefDelta)
{
return new REFDelta(size, type, reader);
}
else if (type == ObjectType.OFSDelta)
{
return new OFSDelta(size, type, reader);
}
else
{
return new Undeltified(size, type, Zlib.Decompress(reader.ReadToEnd()));
}
}
private void VerifyPack()
{
using (GitObjectReader reader = new GitObjectReader(File.OpenRead(Path)))
{
string header;
int version, numberOfObjects;
header = reader.ReadBytes(4).GetString();
version = reader.ReadBytes(4).Sum(b => b);
numberOfObjects = reader.ReadBytes(4).Sum(b => b);
if (Version != version)
throw new PackFileException(String.Format("Bad version number {0}. Was expecting {1}", version, Version), Path);
if (HEADER != header)
throw new PackFileException("Invalid header for pack-file. Needs to be: 'PACK'", Path);
}
}