Method ForkFrom

src/GCodes/GCodeBuffer/GCodeBuffer.cpp:381–405

Copy the entire file state from the other GCode buffer to ourselves. Called to copy the state of the File stream to File2.

// Copy the entire file state from the other GCode buffer to ourselves. Called to copy the state of the File stream to File2.
void GCodeBuffer::ForkFrom(const GCodeBuffer& other) noexcept
{
	GCodeMachineState *ms = other.machineState->ForkChain();
	std::swap(ms, machineState);

	// We should have a single old MachineState object, but to avoid memory leaks allow for the possibility of having a chain
	while (ms != nullptr)
	{
		GCodeMachineState *const msToDelete = ms;
		ms = ms->GetPrevious();
		delete msToDelete;
	}

	printFilePositionAtMacroStart = other.printFilePositionAtMacroStart;
	GetVariables().AssignFrom(other.GetVariables());

# if HAS_SBC_INTERFACE
	if (!isBinaryBuffer && !reprap.UsingSbcInterface())
# endif
	{
		machineState->fileState.Seek(other.GetJobFilePosition());
		GetFileInput()->Reset(machineState->fileState);
		stringParser.StartNewFile();
	}
}

// Determine whether this input channel is at a strictly later point than the other one
bool GCodeBuffer::IsLaterThan(const GCodeBuffer& other) const noexcept