public void Load(string filePath)
{
using (FileStream input = new FileStream(filePath, FileMode.Open, FileAccess.Read))
{
using (BinaryReader reader = new BinaryReader(input))
{
header.Load(reader);
if (!header.IsCompatibleVersion())
{
throw new Exception("Incompatible archive version");
}
var blockCount = reader.ReadInt32();
for (var block = 0; block < blockCount; block++)
{
var text = reader.ReadString();
var size = reader.ReadInt32();
var data = reader.ReadBytes(size);
var expected = reader.ReadUInt64();
var crc = CRC64.Compute(data);
if (crc != expected)
{
throw new Exception($"Item checksum error: '{text}'");
}
items.Add(text, data);
}
}
}
}
private void WriteArchive(BinaryWriter writer)
{
writer.Write(items.Count);
foreach (var(key, data) in items)
{
writer.Write(key);
writer.Write(data.Length);
writer.Write(data);
var crc = CRC64.Compute(data);
writer.Write(crc);
}
}