JensKrumsieck/ChemSharp

using ChemSharp.Spectroscopy.Extensions;

namespace ChemSharp.Spectroscopy.Formats;

public class VarianUVVisFormat : FileFormat
{
    private readonly List<DataPoint> XYData = new();


    private VarianUVVisFormat()
    {
        ValidationMethod = FileExtensions.ValidateWithExtensions;
        NeededFiles = new Dictionary<string, Action<string>> {{".dsw", ReadDSW}};
    }

    private void ReadDSW(string file)
    {
        const int byteOffset = 0x459;
        var byteArray = File.ReadAllBytes(file);
        var cutOffLength = BitConverter.ToInt32(byteArray, 0x6d) * 8; //read length;
        var data = new float[cutOffLength / sizeof(float)];
        Buffer.BlockCopy(byteArray, byteOffset, data, 0, cutOffLength);
        if (data.Length % 2 != 0) throw new InvalidDataException("X and Y Axis Length mismatch");
        for (var i = 0; i < data.Length; i += 2)
            XYData.Add(new DataPoint(data[i], data[i + 1]));
    }

    public static Spectrum Read(string filename)
    {
        var format = new VarianUVVisFormat();
        format.Load(filename);
        return new Spectrum(format.XYData) {Title = filename, XQuantity = "λ", XUnit = "nm"};
    }
}