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Examples of errors detected by the V306…

Examples of errors detected by the V3064 diagnostic

V3064. Division or mod division by zero.


Accord.Net

V3064 Potential division by zero. Consider inspecting denominator '(length - 1)'. Accord.Audio BlackmanWindow.cs 64


public BlackmanWindow(double alpha, int length)
    : base(length)
{
    double a0 = (1.0 - alpha) / 2.0;
    double a1 = 0.5;
    double a2 = alpha / 2.0;

    for (int i = 0; i < length; i++)
        this[i] = (float)(a0 -
          a1 * Math.Cos((2.0 * System.Math.PI * i) /
                        (length - 1)) +
          a2 * Math.Cos((4.0 * System.Math.PI * i) /
                        (length - 1)));
}

Similar errors can be found in some other places:

  • V3064 Potential division by zero. Consider inspecting denominator '(length - 1)'. Accord.Audio BlackmanWindow.cs 65

Accord.Net

V3064 Potential division by zero. Consider inspecting denominator 'size'. Accord.Math Matrix.Construction.cs 794


public static double[,] Centering(int size)
{
  if (size < 0)
  {
      throw new ArgumentOutOfRangeException("size", size,
          "The size of the centering matrix must
           be a positive integer.");
  }

  double[,] C = Matrix.Square(size, -1.0 / size);

  ....
}

Umbraco

V3064 Potential division by zero. Consider inspecting denominator 'maxWidthHeight'. ImageHelper.cs 154


private static ResizedImage GenerateThumbnail(....)
{
  ....
  if (maxWidthHeight >= 0)
  {
    var fx = (float)image.Size.Width / maxWidthHeight;
    var fy = (float)image.Size.Height / maxWidthHeight;
    ....
  }
  ....
}

Similar errors can be found in some other places:

  • V3064 Potential division by zero. Consider inspecting denominator 'maxWidthHeight'. ImageHelper.cs 155

SharpDevelop

V3064 Potential division by zero. Consider inspecting denominator 'workAmount'. XamlSymbolSearch.cs 60


public XamlSymbolSearch(IProject project, ISymbol entity)
{
  ....
  interestingFileNames = new List<FileName>();
  ....
  foreach (var item in ....)
    interestingFileNames.Add(item.FileName);
  ....
  workAmount = interestingFileNames.Count;
  workAmountInverse = 1.0 / workAmount;
}

Unity C# reference source code

V3064 CWE-369 Potential division by zero. Consider inspecting denominator '(float)(width - 1)'. ClothInspector.cs 249


Texture2D GenerateColorTexture(int width)
{
  ....
  for (int i = 0; i < width; i++)
    colors[i] = GetGradientColor(i / (float)(width - 1));
  ....
}

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