/// <summary>
/// Creates an Archiver instance from a file and a read mode
/// </summary>
/// <param name="path">The path to open</param>
/// <param name="mode">The Open Mode</param>
public Archiver(string path, ArchiveOpenMode mode)
{
SourceFile = path;
Console.WriteLine($"Created Archiver with path: {path}");
_archiveStream = GetStream(path, mode);
_archiveHeader = mode == ArchiveOpenMode.CREATE
? new ArchiveHeader()
: ReadArchiveHeader();
//Read Header
}
/// <summary>
/// Function that Reads the Archive Header from the _archiveStream
/// </summary>
/// <returns>The Parsed Archive Header</returns>
private ArchiveHeader ReadArchiveHeader()
{
Console.WriteLine("Parsing Archive Header");
int pD = (int)_archiveStream.Length - 1 - sizeof(int);
_archiveStream.Position = pD;
byte[] pdBlock = new byte[sizeof(int)];
_archiveStream.Read(pdBlock, 0, sizeof(int));
int pDelta = BitConverter.ToInt32(pdBlock, 0);
_archiveStream.Position = pD - pDelta;
return(ArchiveHeader.Deserialize(_archiveStream));
}
/// <summary>
/// Creates an Archiver Instance from a stream
/// </summary>
/// <param name="archiveStream">The stream to be read from</param>
/// <param name="compression">Does the stream contain compressed data?</param>
public Archiver(Stream archiveStream, bool compression)
{
SourceFile = null;
_archiveStream = HandleArchiveCompression(archiveStream, compression);
_archiveHeader = ReadArchiveHeader();
}
