public PackfileIndex(string indexPath, FileMode mode = FileMode.Open)
{
Entries = new Dictionary <ulong, IndexEntry>();
if (mode == FileMode.Open)
{
IndexFileHandle = File.Open(indexPath, mode, FileAccess.Read, FileShare.Read);
using (var reader = new BinaryReader(IndexFileHandle, Encoding.UTF8, true))
{
uint magic = reader.ReadUInt32();
uint entryCount = reader.ReadUInt32();
if (magic != HardcodedMagic)
{
throw new InvalidDataException("Unknown header magic");
}
for (uint i = 0; i < entryCount; i++)
{
var entry = IndexEntry.FromData(reader);
Entries[entry.PathHash] = entry;
}
}
}
else if (mode == FileMode.Create || mode == FileMode.CreateNew)
{
throw new NotImplementedException("Writing archives is not supported at the moment");
}
else
{
throw new NotImplementedException("Archive file mode must be Open, Create, or CreateNew");
}
}
/// <summary>
/// Deserialize a PackfileIndex entry from a BinaryReader.
/// </summary>
/// <param name="reader">Source stream</param>
public static PackfileIndex FromData(BinaryReader reader)
{
var index = new PackfileIndex();
uint magic = reader.ReadUInt32();
uint entryCount = reader.ReadUInt32();
if (magic != HardcodedMagic)
{
throw new InvalidDataException("Unknown header magic");
}
index._entries = new List <IndexEntry>((int)entryCount);
for (uint i = 0; i < entryCount; i++)
{
index._entries.Add(IndexEntry.FromData(reader));
}
return(index);
}
