/// <summary>
/// Reads a stream into a VHD header
/// </summary>
/// <param name="S">Stream</param>
private void FromStream(Stream S)
{
Encoding E = Encoding.Default;
//The comments indicate the offset from the header start
using (var BR = new BinaryReader(S, E, true))
{
//0
Cookie = E.GetString(BR.ReadBytes(8));
//8
Features = (VhdFeatures)Tools.ToNetwork(BR.ReadUInt32());
//12
FileFormatVersion = new Version(Tools.ToNetwork(BR.ReadUInt16()), Tools.ToNetwork(BR.ReadUInt16()));
//16
DataOffset = Tools.ToNetwork(BR.ReadUInt64());
//24
TimeStamp = VHD.FromDiskTimestamp(Tools.ToNetwork(BR.ReadInt32()));
//28
CreatorApplication = E.GetString(BR.ReadBytes(4));
//32
CreatorVersion = new Version(Tools.ToNetwork(BR.ReadUInt16()), Tools.ToNetwork(BR.ReadUInt16()));
//36
CreatorHostOS = E.GetString(BR.ReadBytes(4));
//40
OriginalSize = Tools.ToNetwork(BR.ReadUInt64());
//48
CurrentSize = Tools.ToNetwork(BR.ReadUInt64());
//56
DiskGeometry = new CHS(
Tools.ToNetwork(BR.ReadUInt16()),
BR.ReadByte(),
BR.ReadByte()
);
//60
DiskType = (VhdType)Tools.ToNetwork(BR.ReadUInt32());
//64
Checksum = Tools.ToNetwork(BR.ReadInt32());
//68
DiskId = new Guid(BR.ReadBytes(16));
//84
SavedState = BR.ReadByte() == 1;
//85
Reserved = BR.ReadBytes(RESERVED_FIELD_SIZE);
//512
}
}
/// <summary>
/// Creates a VHD Header with most values set to their defaults
/// </summary>
public Footer()
{
Cookie = DEFAULT_COOKIE;
FileFormatVersion = new Version(V_MAJOR_DEFAULT, V_MINOR_DEFAULT);
DataOffset = OFFSET_NONE;
TimeStamp = DateTime.Now;
CreatorApplication = "ayra";
CreatorVersion = System.Reflection.Assembly.GetExecutingAssembly().GetName().Version;
CreatorHostOS = VhdCreatorHost.WINDOWS;
OriginalSize = 0;
CurrentSize = 0;
DiskGeometry = new CHS(0, 0, 0);
DiskType = VhdType.FixedDisk;
DiskId = Guid.NewGuid();
Features = VhdFeatures.Reserved;
Reserved = new byte[RESERVED_FIELD_SIZE];
Checksum = ComputeChecksum();
}
