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--so, some ringbuffers one for each train
local ringbuflen=1000
local ringbufs={}
local ringbufcnt={}
function advtrains.drb_record(tid, msg)
if not ringbufs[tid] then
ringbufs[tid]={}
ringbufcnt[tid]=0
end
ringbufs[tid][ringbufcnt[tid]]=msg
ringbufcnt[tid]=ringbufcnt[tid]+1
if ringbufcnt[tid] > ringbuflen then
ringbufcnt[tid]=0
end
end
function advtrains.drb_dump(tid)
atdebug("Debug ring buffer output for '"..tid.."':")
local stopcnt=ringbufcnt[<
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