/// <summary>
/// Read MDF from stream.
/// </summary>
/// <param name="stream"></param>
public Mdf(Stream stream)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (!stream.CanSeek)
{
throw new ArgumentException("stream");
}
Data = stream;
Data.Position = 0;
DataGroups = new DataGroupCollection(this);
IDBlock = IdentificationBlock.Read(this, stream);
HDBlock = HeaderBlock.Read(this, stream);
}
internal static HeaderBlock Read(Mdf mdf, Stream stream)
{
var block = new HeaderBlock(mdf);
block.Read(stream);
var data = new byte[block.Size - 4];
var read = stream.Read(data, 0, data.Length);
if (read != data.Length)
{
throw new FormatException();
}
block.DataGroupsCount = BitConverter.ToUInt16(data, 12);
block.Date = mdf.IDBlock.Encoding.GetString(data, 14, 10).Humanize();
block.Time = mdf.IDBlock.Encoding.GetString(data, 24, 8).Humanize();
block.Author = mdf.IDBlock.Encoding.GetString(data, 32, 32).Humanize();
block.Organization = mdf.IDBlock.Encoding.GetString(data, 64, 32).Humanize();
block.Project = mdf.IDBlock.Encoding.GetString(data, 96, 32).Humanize();
block.Subject = mdf.IDBlock.Encoding.GetString(data, 128, 32).Humanize();
if (mdf.IDBlock.Version >= 320)
{
block.TimeStamp = BitConverter.ToUInt64(data, 160);
block.UTCTimeOffset = BitConverter.ToInt16(data, 168);
block.TimeQuality = (TimeQuality)BitConverter.ToUInt16(data, 170);
block.TimerIdentification = mdf.IDBlock.Encoding.GetString(data, 172, 32).Humanize();
}
else
{
block.TimeStamp = 0;
block.UTCTimeOffset = 0;
block.TimeQuality = 0;
block.TimerIdentification = "";
}
var ptrFirstDataGroup = BitConverter.ToUInt32(data, 0);
var ptrTextBlock = BitConverter.ToUInt32(data, 4);
var ptrProgramBlock = BitConverter.ToUInt32(data, 8);
// Check if ptrTextBlock is null
if (ptrTextBlock != 0)
{
stream.Position = ptrTextBlock;
block.FileComment = TextBlock.Read(mdf, stream);
}
// Check if ptrProgramBlock is null
if (ptrProgramBlock != 0)
{
stream.Position = ptrProgramBlock;
block.ProgramBlock = ProgramBlock.Read(mdf, stream);
}
// Check if ptrFirstDataGroup is null
if (ptrFirstDataGroup != 0)
{
mdf.DataGroups.Read(DataGroupBlock.Read(mdf, stream, ptrFirstDataGroup));
}
return(block);
}