/// <summary>
/// Initializes a new instance of the <see cref="DiskImageFile"/> class.
/// </summary>
/// <param name="stream">The stream to read.</param>
/// <param name="ownsStream">Indicates if the new instance should control the lifetime of the stream.</param>
public DiskImageFile(Stream stream, Ownership ownsStream)
{
this.udifHeader = new UdifResourceFile();
this.stream = stream ?? throw new ArgumentNullException(nameof(stream));
this.ownsStream = ownsStream;
if (stream.Length < this.udifHeader.Size)
{
throw new InvalidDataException("The file is not a valid DMG file: could not read the UDIF header.");
}
stream.Position = stream.Length - this.udifHeader.Size;
byte[] data = StreamUtilities.ReadExact(stream, this.udifHeader.Size);
this.udifHeader.ReadFrom(data, 0);
if (!this.udifHeader.SignatureValid)
{
throw new InvalidDataException("The file is not a valid DMG file: could not read the UDIF header.");
}
stream.Position = (long)this.udifHeader.XmlOffset;
byte[] xmlData = StreamUtilities.ReadExact(stream, (int)this.udifHeader.XmlLength);
Dictionary <string, object> plist = (Dictionary <string, object>)XmlPropertyListParser.Parse(xmlData).ToObject();
this.resources = ResourceFork.FromPlist(plist);
this.Buffer = new UdifBuffer(stream, this.resources, this.udifHeader.SectorCount);
}
/// <summary>
/// Initializes a new instance of the DiskImageFile class.
/// </summary>
/// <param name="stream">The stream to read</param>
/// <param name="ownsStream">Indicates if the new instance should control the lifetime of the stream.</param>
public DiskImageFile(Stream stream, Ownership ownsStream)
{
_udifHeader = new UdifResourceFile();
_stream = stream;
_ownsStream = ownsStream;
stream.Position = stream.Length - _udifHeader.Size;
byte[] data = Utilities.ReadFully(stream, _udifHeader.Size);
_udifHeader.ReadFrom(data, 0);
if (_udifHeader.SignatureValid)
{
stream.Position = (long)_udifHeader.XmlOffset;
byte[] xmlData = Utilities.ReadFully(stream, (int)_udifHeader.XmlLength);
var plist = Plist.Parse(new MemoryStream(xmlData));
_resources = ResourceFork.FromPlist(plist);
_buffer = new UdifBuffer(stream, _resources, _udifHeader.SectorCount);
}
}
/// <summary>
/// Initializes a new instance of the DiskImageFile class.
/// </summary>
/// <param name="stream">The stream to read.</param>
/// <param name="ownsStream">Indicates if the new instance should control the lifetime of the stream.</param>
public DiskImageFile(Stream stream, Ownership ownsStream)
{
_udifHeader = new UdifResourceFile();
_stream = stream;
_ownsStream = ownsStream;
stream.Position = stream.Length - _udifHeader.Size;
byte[] data = StreamUtilities.ReadExact(stream, _udifHeader.Size);
_udifHeader.ReadFrom(data, 0);
if (_udifHeader.SignatureValid)
{
stream.Position = (long)_udifHeader.XmlOffset;
byte[] xmlData = StreamUtilities.ReadExact(stream, (int)_udifHeader.XmlLength);
Dictionary <string, object> plist = Plist.Parse(new MemoryStream(xmlData));
_resources = ResourceFork.FromPlist(plist);
Buffer = new UdifBuffer(stream, _resources, _udifHeader.SectorCount);
}
}
