Change an input and make simulation correct. N.B. step must be the latest time-step since future steps are not rerun (TODO: perhaps they should be!)

Change multiple inputs in one batch before re-running the simulation NOTE - Only used in TruthTable

Check if the components and connections of a fast simulation and a canvas are the same. Is the design the simulation was built from still what the project holds? False puts the Refresh button up. Asked of DesignAsDrawn and not of the SIMULATED sheets, because the two differ for a design holding an array component: there the simulation is of a wrapper and a body, and the project has neither - so every such simulation reported itself edited the moment it started.

Every step array of a build, dense by its own index - what turns a driver HANDLE back into the array it names, in one indexed load. A driver index is what the port slice hands the renderer (PortView.sheetSliceOf) and what a read quotes back, so the simulator answering reads must be able to look one up without the wave tables a lean build does not have. Slots nothing owns - a clocked component's state array, allocated an index but not an IOArray - stay None, and a read naming one is an error. Memoised on the simulation: one array per build, the length of NumStepArrays, filled by one walk of the components. On the renderer this is never built - the renderer reads no arrays by handle - so the memo costs nothing there.

Extract top-level inputs or outputs with names and wire widths. Used by legacy code.

As extractFastSimulationIOs but for FData - used by truth table logic.

return output port data from simulation as a Bit list Each element in list is one bit

return state data from simulation

Extract the width of a component's output port.

Extract all Viewer components with names and wire widths.

As extractViewers but for FData - used by truth table logic.

Return array of simulation output values for a given output port. Values are returned from steos 0 to (tick - 1). Used by testParsser. Only works if tick < maxArraySize.

Extract a component's label and its full name which includes all of its path to root of simulation.

Get the input value of a fast component as a bigint. fc: the fast component to get the input from. inputNum: which input as numbered in the inputs array. step: which time step to get the value from. used by waveSimSVGs, maybe this function could be moved there and optimised as code there at cost of modularity.

Get the output value of a fast component as a bigint. fc: the fast component to get the output from. outputNum: which output as numbered in the outputs array. step: which time step to get the value from. used by waveSimSVGs, maybe this function could be moved there and optimised as code there at cost of modularity.

Check if a fastComponent output is the same as the default value for all time steps. Used by simulationView. The current implementation seems not quite right when tick > MaxArraySize. ToDo - make this work for all time steps

One sample of a resolved array, as a bigint whatever the width. The modulo is not optional. A step array is a REGION of a shared slab, so a step past the end of the region reads the next port's data with nothing to catch it - see IOArray.

The step array an output port's data lives in, resolved ONCE. Everything `extractFastSimulationOutput` does per read except the read itself: the map lookup on (component, access path) - a structural comparison on a list - and the hop through FCustomOutputCompLookup that answers a custom component's output with the array of the Output component inside the subsheet. What comes back is the array and its width, from which a value at a cycle is an indexed load. For anything reading MANY samples of the same signal. Reading a whole window per sample cost that lookup, a FastData and an FSInterface allocation, and a conversion to bigint, per sample - for a wave that is often one bit wide. A Result, not an exception: the caller may be a server answering a request it did not compose, where a bad signal name is an answer rather than a crash.