/// <summary>
/// Writes <see cref="LowranceLogData"/> to <see cref="Stream"/>
/// </summary>
/// <param name="stream"><see cref="Stream"/></param>
/// <param name="data"><see cref="LowranceLogData"/></param>
public static void WriteToStream(Stream stream, LowranceLogData data)
{
using (var writer = new BinaryWriter(stream))
{
Header.WriteHeader(writer, data.Header, 0);
Frame.WriteFrames(writer, data.Frames, Header.Lenght, data.Header.FileVersion);
}
}
/// <summary>
/// Reads <see cref="LowranceLogData"/> from <see cref="Stream"/>
/// </summary>
/// <param name="stream"><see cref="Stream"/></param>
/// <returns><see cref="LowranceLogData"/></returns>
public static LowranceLogData ReadFromStream(Stream stream)
{
if (!stream.CanRead)
{
throw new InvalidOperationException("Can't read stream");
}
if (!stream.CanSeek)
{
throw new InvalidOperationException("Can't seek stream");
}
//first of all read header
if (stream.Length < Header.Lenght)
{
throw new ArgumentException(nameof(stream.Length) + " less then " + nameof(Header.Lenght), nameof(stream.Length));
}
var data = new LowranceLogData
{
Frames = new List <Frame>()
};
using (var reader = new BinaryReader(stream))
{
data.Header = Header.ReadHeader(reader, 0);
var framesMap = Frame.GetFramesMap(reader, Header.Lenght, data.Header.FileVersion, out var fileCreationDateTime);
data.CreationDateTime = fileCreationDateTime;
foreach (var frameRecord in framesMap)
{
var frame = Frame.ReadFrame(reader, frameRecord.Item1, data.Header.FileVersion);
frame.DateTimeOffset = data.CreationDateTime + frameRecord.Item2;
data.Frames.Add(frame);
}
}
return(data);
}
