private static bool Equals(DbaseFieldValue x, DbaseFieldValue y)
{
if (null == x && null == y)
{
return(false);
}
if (
null == x ||
null == y ||
x.GetType() != y.GetType() ||
false == x.Field.Equals(y.Field))
{
return(false);
}
if (x is DbaseDateTime xDateTime && y is DbaseDateTime yDateTime)
{
return(Equals(xDateTime.Value, yDateTime.Value));
}
if (x is DbaseInt32 xInt32 && y is DbaseInt32 yInt32)
{
return(Equals(xInt32.Value, yInt32.Value));
}
if (x is DbaseSingle xSingle && y is DbaseSingle ySingle)
{
return(Equals(xSingle.Value, ySingle.Value));
}
if (x is DbaseDouble xDouble && y is DbaseDouble yDouble)
{
return(Equals(xDouble.Value, yDouble.Value));
}
if (x is DbaseString xString && y is DbaseString yString)
{
return(Equals(xString.Value, yString.Value));
}
throw new NotImplementedException($"No equality impelemented for {x.GetType().FullName}");
}
private static int GetHashCode(DbaseFieldValue fieldValue)
{
if (null == fieldValue)
{
return(0);
}
int CreateFieldHashForValue(object value)
{
unchecked
{
return((fieldValue.Field?.GetHashCode() ?? 0) ^ 397 ^ value.GetHashCode());
}
}
if (fieldValue is DbaseDateTime dbaseDateTime)
{
return(CreateFieldHashForValue(dbaseDateTime.Value));
}
if (fieldValue is DbaseInt32 dbaseInt32)
{
return(CreateFieldHashForValue(dbaseInt32.Value));
}
if (fieldValue is DbaseSingle dbaseSingle)
{
return(CreateFieldHashForValue(dbaseSingle.Value));
}
if (fieldValue is DbaseDouble dbaseDouble)
{
return(CreateFieldHashForValue(dbaseDouble.Value));
}
if (fieldValue is DbaseString dbaseString)
{
return(CreateFieldHashForValue(dbaseString.Value));
}
throw new NotImplementedException($"No GetHashCode implementation for {fieldValue.GetType().FullName}");
}