to release the allocated circuit nodes in
the corresponding adms generated DEVsetup() routine
which is required when invoking CKTsetup() more than once
without an intervening "reset"
Allow to register a callback function in the cfunc.mod files,
which will be invoked in MIFdestroy.
Usefull to "free" memory which has been allocated locally in a cfunc.mod file.
src/spicelib/devices/*/*set.c, XXXunsetup(), reset local node variables unconditionally
and use a more robust test for local node numbers.
That is, transform this pattern :
if (here->Node && ...) {
CKTdltNNum(ckt, here->Node);
here->Node = 0;
}
into this :
if (here->Node > 0 && ...)
CKTdltNNum(ckt, here->Node);
here->Node = 0;
The change of "!= 0" ==> "> 0" accounts for rare cases where "Node"
might have been set to -1, (meaning "unconnected")
The unconditional execution of the zero assignment is for those cases
where "Node" might have been assigned to some external or other local Node.
If so, the variable would not be set to zero, confusing the "guarding" if's
in the corresponding XXXsetup() routine.
The Pattern to follow is:
1) unset and delete *all* local Nodes in XXXunsetup()
2) allocate all of them again in a re-invocation of XXXsetup(),
exactly the same way as in the very first invocation.
for almost all other external nodes (notable exception "txl")
src/spicelib/devices/*/*def*.h, declare external node variables const
1) The compiler shall emit an error message if we still mess around
with external node numbers.
2) To mark which elements of the instance struct are meant to be set
externally when parsing the netlist
These "external" node variables are exclusively set via the
overlay struct GENinstance, member GENnode[]
We shall not mess around with these "external" node variables
because it would get rather difficult to avoid bugs considering
re-invocation of the XXXsetup() routine.
This gets interesting for devices with optional ports,
which get copied around depending on the amount of connected ports.
