/// <summary>
/// IComparer.Compare() implementation.
/// </summary>
/// <param name="x">Object to compare.</param>
/// <param name="y">Object to compare.</param>
/// <returns>
/// Returns 0 - if equal, -1 - if x < y, +1 - if x > y.
/// </returns>
public int Compare(object x, object y)
{
if (x == y)
{
return(0);
}
if (x == null)
{
return(-1);
}
if (y == null)
{
return(1);
}
if (x is string sa && y is string sb)
{
return(SimpleCaseFolding.CompareUsingSimpleCaseFolding(sa, sb));
}
if (x is IComparable ia)
{
return(ia.CompareTo(y));
}
throw new ArgumentException("SR.Argument_ImplementIComparable");
}
/// <summary>
/// IEqualityComparer<string>.Equals() implementation.
/// </summary>
/// <param name="x">Left object to compare.</param>
/// <param name="y">Right object to compare.</param>
/// <returns>
/// Returns true if equal.
/// </returns>
public bool Equals(string x, string y)
{
if (object.ReferenceEquals(x, y))
{
return(true);
}
if (x == null || y == null)
{
return(false);
}
return(SimpleCaseFolding.CompareUsingSimpleCaseFolding(x, y) == 0);
}
/// <summary>
/// IComparer<string>.GetHashCode() implementation.
/// </summary>
/// <param name="x">Left object to compare.</param>
/// <param name="y">Right object to compare.</param>
/// <returns>
/// Returns 0 - if equal, -1 - if x < y, +1 - if x > y.
/// </returns>
public int Compare(string x, string y)
{
if (object.ReferenceEquals(x, y))
{
return(0);
}
if (x == null)
{
return(-1);
}
if (y == null)
{
return(1);
}
return(SimpleCaseFolding.CompareUsingSimpleCaseFolding(x, y));
}
