// IComparable
// Compares this object to another object, returning an integer that
// indicates the relationship.
// Returns a value less than zero if this < object, zero if this = object,
// or a value greater than zero if this > object.
// null is considered to be less than any instance.
// If object is not of same type, this method throws an ArgumentException.
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public int CompareTo(Object value)
{
if (value is SqlGuid)
{
SqlGuid i = (SqlGuid)value;
return(CompareTo(i));
}
throw ADP.WrongType(value.GetType(), typeof(SqlGuid));
}
// Comparison operators
private static EComparison Compare(SqlGuid x, SqlGuid y)
{
//Swap to the correct order to be compared
for (int i = 0; i < s_sizeOfGuid; i++)
{
byte b1, b2;
b1 = x._value[s_rgiGuidOrder[i]];
b2 = y._value[s_rgiGuidOrder[i]];
if (b1 != b2)
{
return((b1 < b2) ? EComparison.LT : EComparison.GT);
}
}
return(EComparison.EQ);
}
// Compares this instance with a specified object
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public override bool Equals(Object value)
{
if (!(value is SqlGuid))
{
return(false);
}
SqlGuid i = (SqlGuid)value;
if (i.IsNull || IsNull)
{
return(i.IsNull && IsNull);
}
else
{
return((this == i).Value);
}
}
public int CompareTo(SqlGuid value)
{
// If both Null, consider them equal.
// Otherwise, Null is less than anything.
if (IsNull)
{
return(value.IsNull ? 0 : -1);
}
else if (value.IsNull)
{
return(1);
}
if (this < value)
{
return(-1);
}
if (this > value)
{
return(1);
}
return(0);
}
// Alternative method for operator >=
public static SqlBoolean GreaterThanOrEqual(SqlGuid x, SqlGuid y)
{
return(x >= y);
}
// Alternative method for operator <=
public static SqlBoolean LessThanOrEqual(SqlGuid x, SqlGuid y)
{
return(x <= y);
}
// Alternative method for operator >
public static SqlBoolean GreaterThan(SqlGuid x, SqlGuid y)
{
return(x > y);
}
// Alternative method for operator <
public static SqlBoolean LessThan(SqlGuid x, SqlGuid y)
{
return(x < y);
}
// Alternative method for operator !=
public static SqlBoolean NotEquals(SqlGuid x, SqlGuid y)
{
return(x != y);
}
//--------------------------------------------------
// Alternative methods for overloaded operators
//--------------------------------------------------
// Alternative method for operator ==
public static SqlBoolean Equals(SqlGuid x, SqlGuid y)
{
return(x == y);
}