Method IsLaterThan

src/GCodes/GCodeBuffer/GCodeBuffer.cpp:408–447

Determine whether this input channel is at a strictly later point than the other one

// Determine whether this input channel is at a strictly later point than the other one
bool GCodeBuffer::IsLaterThan(const GCodeBuffer& other) const noexcept
{
	unsigned int ourDepth = GetStackDepth();
	if (ourDepth == 0 && !machineState->DoingFile())
	{
		// This input is not executing from file, so treat it as having advanced past any sync points already
		return true;
	}

	unsigned int otherDepth = other.GetStackDepth();
	const GCodeMachineState *ourState = machineState;
	const GCodeMachineState *otherState = other.machineState;
	while (ourDepth > otherDepth)
	{
		ourState = ourState->GetPrevious();
		--ourDepth;
	}
	while (otherDepth > ourDepth)
	{
		otherState = otherState->GetPrevious();
		--otherDepth;
	}

	bool oursIsLater = false;
	while (ourState != nullptr)
	{
		if (ourState->fpos > otherState->fpos)
		{
			oursIsLater = true;
		}
		else if (ourState->fpos < otherState->fpos)
		{
			oursIsLater = false;
		}
		otherState = otherState->GetPrevious();
		ourState = ourState->GetPrevious();
	}

	return oursIsLater;
}

#endif