public override int GetHashCode(string obj)
{
if (obj == null)
{
throw new ArgumentNullException(nameof(obj));
}
int length = DiagnosticIdPrefix.GetPrefixLength(obj);
return(StringComparer.Ordinal.GetHashCode(obj.Substring(0, length)));
}
public override bool Equals(string x, string y)
{
if (object.ReferenceEquals(x, y))
{
return(true);
}
if (x == null)
{
return(false);
}
if (y == null)
{
return(false);
}
int length1 = DiagnosticIdPrefix.GetPrefixLength(x);
int length2 = DiagnosticIdPrefix.GetPrefixLength(y);
return(length1 == length2 &&
string.Compare(x, 0, y, 0, length1, StringComparison.Ordinal) == 0);
}
public override int Compare(string x, string y)
{
if (object.ReferenceEquals(x, y))
{
return(0);
}
if (x == null)
{
return(-1);
}
if (y == null)
{
return(1);
}
int length1 = DiagnosticIdPrefix.GetPrefixLength(x);
int length2 = DiagnosticIdPrefix.GetPrefixLength(y);
if (length1 == length2)
{
return(string.Compare(x, 0, y, 0, length1, StringComparison.Ordinal));
}
int length = Math.Min(length1, length2);
int result = string.Compare(x, 0, y, 0, length, StringComparison.Ordinal);
if (result != 0)
{
return(result);
}
return(length1.CompareTo(length2));
}
