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path: root/Crossroads/nodes/(881,6,886).lua

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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


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