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|
-- train_related.lua
-- Occupation of track sections - mainly implementation of train callbacks
--[[
Track section occupation is saved as follows
In train:
train.il_sections = {
[n] = {ts_id = <...> (origin = <sigd>)}
}
-- "origin" is the TCB (signal describer) the train initially entered this section
In track section
ts.trains = {
[n] = <train_id>
}
When any inconsistency is detected, we will assume the most restrictive setup.
It will be possible to indicate a section "free" via the GUI.
]]
local ildb = advtrains.interlocking.db
local sigd_equal = advtrains.interlocking.sigd_equal
local function itexist(tbl, com)
for _,item in ipairs(tbl) do
if (item==com) then
return true
end
end
return false
end
local function itkexist(tbl, ikey, com)
for _,item in ipairs(tbl) do
if item[ikey] == com then
return true
end
end
return false
end
local function itremove(tbl, com)
local i=1
while i <= #tbl do
if tbl[i] == com then
table.remove(tbl, i)
else
i = i + 1
end
end
end
local function itkremove(tbl, ikey, com)
local i=1
while i <= #tbl do
if tbl[i][ikey] == com then
table.remove(tbl, i)
else
i = i + 1
end
end
end
local function setsection(tid, train, ts_id, ts, sigd)
-- train
if not train.il_sections then train.il_sections = {} end
if not itkexist(train.il_sections, "ts_id", ts_id) then
table.insert(train.il_sections, {ts_id = ts_id, origin = sigd})
end
-- ts
if not ts.trains then ts.trains = {} end
if not itexist(ts.trains, tid) then
table.insert(ts.trains, tid)
end
-- routes
local tcbs = advtrains.interlocking.db.get_tcbs(sigd)
-- route setting - clear route state
if ts.route then
--atdebug(tid,"enters",ts_id,"examining Routestate",ts.route)
if not sigd_equal(ts.route.entry, sigd) then
-- Train entered not from the route. Locate origin and cancel route!
atwarn("Train",tid,"hit route",ts.route.rsn,"!")
advtrains.interlocking.route.cancel_route_from(ts.route.origin)
atwarn("Route was cancelled.")
else
-- train entered route regularily. Reset route and signal
|
