public bool Equals(
PackedExponentTape t,
ExponentComparison ec,
bool ignoreTheirSuperfluousLeft,
bool ignoreTheirSuperfluousRight)
{
if (t == null)
{
return(false);
}
return(true &&
LeftSideEqualWith(t, ec, ignoreTheirSuperfluousLeft) &&
RightSideEqualWith(t, ec, ignoreTheirSuperfluousRight));
}
public bool RightSideEqualWith(PackedExponentTape t, ExponentComparison ec, bool ignoreTheirSuperfluous)
{
if (t == null)
{
throw new ArgumentNullException();
}
if (_PositionInMacro != t._PositionInMacro)
{
return(false);
}
if (FacingRight != t.FacingRight)
{
return(false);
}
return(ContentEqualWith(ec, _R.First, t._R.First, ignoreTheirSuperfluous));
}
/// <summary>
/// Compare cell contents.
///
/// Begin is inclusive, end is exclusive (use null to compare to the end).
/// </summary>
private bool ContentEqualWith(
ExponentComparison ec,
Cell tape1,
Cell tape2,
bool ignoreSuperfluousTape2)
{
while (tape1 != null)
{
if (tape2 == null)
{
return(false);
}
if (tape1.Data != tape2.Data)
{
return(false);
}
if (ec == ExponentComparison.Ignore)
{
// nothing
}
else if (ec == ExponentComparison.EqualityOfDirectComponent)
{
if (tape1.Exponent != tape2.Exponent)
{
return(false);
}
}
else if (ec == ExponentComparison.TotalEquality)
{
if (!tape1.Exponent.Equals(tape2.Exponent))
{
return(false);
}
}
tape1 = tape1.Next;
tape2 = tape2.Next;
}
if (!ignoreSuperfluousTape2 && tape2 != null)
{
return(false);
}
return(true);
}
/// <summary>
/// Compare cell contents.
///
/// Begin is inclusive, end is exclusive (use null to compare to the end).
/// </summary>
private bool ContentEqualWith (
ExponentComparison ec,
Cell tape1,
Cell tape2,
bool ignoreSuperfluousTape2)
{
while (tape1 != null) {
if (tape2 == null) {
return false;
}
if (tape1.Data != tape2.Data) {
return false;
}
if (ec == ExponentComparison.Ignore) {
// nothing
}
else if (ec == ExponentComparison.EqualityOfDirectComponent) {
if (tape1.Exponent != tape2.Exponent) {
return false;
}
}
else if (ec == ExponentComparison.TotalEquality) {
if (!tape1.Exponent.Equals (tape2.Exponent)) {
return false;
}
}
tape1 = tape1.Next;
tape2 = tape2.Next;
}
if (!ignoreSuperfluousTape2 && tape2 != null) {
return false;
}
return true;
}
public bool RightSideEqualWith (PackedExponentTape t, ExponentComparison ec, bool ignoreTheirSuperfluous)
{
if (t == null)
throw new ArgumentNullException ();
if (_PositionInMacro != t._PositionInMacro) {
return false;
}
if (FacingRight != t.FacingRight) {
return false;
}
return ContentEqualWith (ec, _R.First, t._R.First, ignoreTheirSuperfluous);
}
public bool Equals (
PackedExponentTape t,
ExponentComparison ec,
bool ignoreTheirSuperfluousLeft,
bool ignoreTheirSuperfluousRight)
{
if (t == null) {
return false;
}
return true
&& LeftSideEqualWith (t, ec, ignoreTheirSuperfluousLeft)
&& RightSideEqualWith (t, ec, ignoreTheirSuperfluousRight);
}
