DoubleAggregator.cs

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using System.ComponentModel;
 
namespace System.Xml.Xsl.Runtime;
 
[EditorBrowsable(EditorBrowsableState.Never)]
public struct DoubleAggregator
{
    private double _result;
 
    private int _cnt;
 
    public double SumResult => _result;
 
    public double AverageResult => _result / (double)_cnt;
 
    public double MinimumResult => _result;
 
    public double MaximumResult => _result;
 
    public bool IsEmpty => _cnt == 0;
 
    public void Create()
    {
        _cnt = 0;
    }
 
    public void Sum(double value)
    {
        if (_cnt == 0)
        {
            _result = value;
            _cnt = 1;
        }
        else
        {
            _result += value;
        }
    }
 
    public void Average(double value)
    {
        if (_cnt == 0)
        {
            _result = value;
        }
        else
        {
            _result += value;
        }
        _cnt++;
    }
 
    public void Minimum(double value)
    {
        if (_cnt == 0 || value < _result || double.IsNaN(value))
        {
            _result = value;
        }
        _cnt = 1;
    }
 
    public void Maximum(double value)
    {
        if (_cnt == 0 || value > _result || double.IsNaN(value))
        {
            _result = value;
        }
        _cnt = 1;
    }
}