/// <summary>
/// Creates a new archive based on the specified stream.
/// </summary>
public Archive(Stream stream)
{
if (!stream.CanRead)
{
throw new IOException("Archive stream must be readable.");
}
if (!stream.CanSeek)
{
throw new IOException("Archive stream must be seekable.");
}
this.stream = stream;
br = new BinaryReader(stream);
bw = new BinaryWriter(stream);
if (stream.Length == 0)
{
bw.Write(Encoding.ASCII.GetBytes("Archive:"));
Reserve();
stream.Position = 8;
bw.Write((short)5);
bw.Write(0);
bw.Write(-1);
bw.Write("");
bw.Flush();
}
stream.Position = 0;
if (Encoding.ASCII.GetString(br.ReadBytes(8)) != "Archive:")
{
throw new Exception("Stream is not a valid archive.");
}
entries.Add(new FileInfo(this, "", 0, 1));
AStream a = new AStream((FileInfo)entries[0]);
BinaryReader ar = new BinaryReader(a);
next_dir = ar.ReadInt32();
string s;
while ((s = ar.ReadString()) != "")
{
int i = ar.ReadInt32(), j = ar.ReadInt32();
if (i < 0)
{
entries.Add(new DirInfo(this, s, i, j));
}
else
{
entries.Add(new FileInfo(this, s, i, j));
}
}
a.Close();
}
internal void UpdateDirs()
{
AStream a = new AStream((FileInfo)entries[0], FileAccess.ReadWrite);
BinaryWriter aw = new BinaryWriter(a);
aw.Write(next_dir);
foreach (DirInfo di in entries)
{
if (di.Name == "")
{
continue;
}
aw.Write(di.Name);
aw.Write(di.Index);
aw.Write(di.Parent);
}
aw.Write("");
a.SetLength(a.Position);
a.Close();
}