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authororwell96 <mono96.mml@gmail.com>2016-10-29 21:08:26 +0200
committerorwell96 <mono96.mml@gmail.com>2016-10-29 21:08:26 +0200
commitee6b7494bb8ec88accb6243437d81b0bbecdb9eb (patch)
treefd5adeaabb23d6c6d6ebda20a04fccbdda0df2cd /assets
parentbe37a649f7ea83007ee15effed0a474fb8d00f59 (diff)
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add 2 value sanity checks which should not be needed but are for any reason
game crashed because of these values being nil, I don't know how these values could even become nil, but whatever. Interestingly, I never found the wagon entity that was causing the crashs
Diffstat (limited to 'assets')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.3 (git 2.39.1) at 2025-07-06 18:52:38 +0000
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-- Setting and clearing routes

-- TODO duplicate
local lntrans = { "A", "B" }
local function sigd_to_string(sigd)
	return minetest.pos_to_string(sigd.p).." / "..lntrans[sigd.s]
end

local ildb = advtrains.interlocking.db
local ilrs = {}

local sigd_equal = advtrains.interlocking.sigd_equal

-- table containing locked points
-- also manual locks (maintenance a.s.o.) are recorded here
-- [pts] = { 
--		[n] = { [by = <ts_id>], rsn = <human-readable text>, [origin = <sigd>] }
--	}
ilrs.rte_locks = {}
ilrs.rte_callbacks = {
	ts = {},
	lck = {}
}


-- main route setting. First checks if everything can be set as designated,
-- then (if "try" is not set) actually sets it
-- returns:
-- true - route can be/was successfully set
-- false, message, cbts, cblk - something went wrong, what is contained in the message.
-- cbts: the ts id of the conflicting ts, cblk: the pts of the conflicting component
function ilrs.set_route(signal, route, try)
	if not try then
		local tsuc, trsn, cbts, cblk = ilrs.set_route(signal, route, true)
		if not tsuc then
			return false, trsn, cbts, cblk
		end
	end

	
	-- we start at the tc designated by signal
	local c_sigd = signal
	local first = true
	local i = 1
	local rtename = route.name
	local signalname = (ildb.get_tcbs(signal).signal_name or "") .. sigd_to_string(signal)
	local c_tcbs, c_ts_id, c_ts, c_rseg, c_lckp
	-- signals = { { pos = ., tcbs_ref = <tcbs>, role = "main_distant", main_aspect = nil, dst_type = "next_main" or "none" } 
	local signals = {}
	local nodst
	while c_sigd and i<=#route do
		c_tcbs = ildb.get_tcbs(c_sigd)
		if not c_tcbs then
			if not try then atwarn("Did not find TCBS",c_sigd,"while setting route",rtename,"of",signal) end
			return false, "No TCB found at "..sigd_to_string(c_sigd)..". Please update or reconfigure route!"
		end
		if i == 1 then
			nodst = c_tcbs.nodst
		end
		c_ts_id = c_tcbs.ts_id
		if not c_ts_id then
			if not try then atwarn("Encountered End-Of-Interlocking while setting route",rtename,"of",signal) end
			return false, "No track section adjacent to "..sigd_to_string(c_sigd)..". Please reconfigure route!"
		end
		c_ts = ildb.get_ts(c_ts_id)
		c_rseg = route[i]
		c_lckp = {}
		
		if not c_ts then
			if not try then atwarn("Encountered ts missing during a real run of routesetting routine, at ts=",c_ts_id,"while setting route",rtename,"of",signal) end
			return false, "Section '"..(c_ts_id).."' not found!", c_ts_id, nil
		elseif c_ts.route then
			if not try then atwarn("Encountered ts lock during a real run of routesetting routine, at ts=",c_ts_id,"while setting route",rtename,"of",signal) end
			return false, "Section '"..(c_ts.name or c_ts_id).."' already has route set from "..sigd_to_string(c_ts.route.origin)..":\n"..c_ts.route.rsn, c_ts_id, nil
		end
		if c_ts.trains and #c_ts.trains>0 then
			if c_rseg.call_on then
				--atdebug("Routesetting: Call-on situation in", c_ts_id)
			else
				if not try then atwarn("Encountered ts occupied during a real run of routesetting routine, at ts=",c_ts_id,"while setting route",rtename,"of",signal) end
				return false, "Section '"..(c_ts.name or c_ts_id).."' is occupied!", c_ts_id, nil
			end
		end
		
		-- collect locks from rs cache and from route def
		local c_locks = {}
		if route.use_rscache and c_ts.rs_cache and c_rseg.next then
			-- rscache needs to be enabled, present and next must be defined
			start_pkey = advtrains.encode_pos(c_sigd.p)
			end_pkey = advtrains.encode_pos(c_rseg.next.p)
			if c_ts.rs_cache[start_pkey] and c_ts.rs_cache[start_pkey][end_pkey] then
				for lp,lst in pairs(c_ts.rs_cache[start_pkey][end_pkey]) do
					--atdebug("Add lock from RSCache:",lp,"->",lst)
					c_locks[lp] = lst
				end
			elseif not try then
				atwarn("While setting route",rtename,"of",signal,"segment "..i..",required path from",c_tcbs,"to",c_rseg.next,"was not found in the track section's RS cache. Please check!")
			end
		end
		-- add all from locks, these override the rscache
		for lpts,lst in pairs(c_rseg.locks) do
			--atdebug("Add lock from Routedef:",lpts,"->",lst,"overrides",c_locks[lpts] or "none")
			c_locks[lpts] = lst
		end
		
		for lp, state in pairs(c_locks) do
			local confl = ilrs.has_route_lock(lp, state)
			
			local pos = advtrains.decode_pos(lp)
			if advtrains.is_passive(pos) then
				local cstate = advtrains.getstate(pos)
				if cstate ~= state then
					local confl = ilrs.has_route_lock(lp)
					if confl then
						if not try then atwarn("Encountered route lock while a real run of routesetting routine, at position",pos,"while setting route",rtename,"of",signal) end
						return false, "Lock conflict at "..minetest.pos_to_string(pos)..", Held locked by:\n"..confl, nil, lp
					elseif not try then
						advtrains.setstate(pos, state)
					end
				end
				if not try then
					ilrs.add_route_lock(lp, c_ts_id, "Route '"..rtename.."' from signal '"..signalname.."'", signal)
					c_lckp[#c_lckp+1] = lp
				end
			else
				if not try then atwarn("Encountered route lock misconfiguration (no passive component) while a real run of routesetting routine, at position",pts,"while setting route",rtename,"of",signal) end
				return false, "No passive component at "..minetest.pos_to_string(pos)..". Please update track section or reconfigure route!"
			end
		end
		-- sanity check, is section at next the same as the current?
		local nvar = c_rseg.next
		if nvar then
			local re_tcbs = ildb.get_tcbs({p = nvar.p, s = (nvar.s==1) and 2 or 1})
			if (not re_tcbs or not re_tcbs.ts_id or re_tcbs.ts_id~=c_ts_id)
					and route[i+1] then --FIX 2025-01-08: in old worlds the final TCB may be wrong (it didn't matter back then), don't error out here (route still shown invalid in UI)
				if not try then atwarn("Encountered inconsistent ts (front~=back) while a real run of routesetting routine, at position",pts,"while setting route",rtename,"of",signal) end
				return false, "TCB at "..minetest.pos_to_string(nvar.p).." has different section than previous TCB. Please update track section or reconfigure route!"
			end
		end
		-- reserve ts and write locks
		if not try then
			if not route[i+1] then
				-- We shouldn't use the "next" value of the final route segment, because this can lead to accidental route-cancelling of already set routes from another signal.
				nvar = nil
			end
			c_ts.route = {
				origin = signal,
				entry = c_sigd,
				rsn = "Route '"..rtename.."' from signal '"..signalname.."', segment #"..i,
				first = first,
			}
			c_ts.route_post = {
				locks = c_lckp,
				next = nvar,
			}
			if c_tcbs.signal then
				c_tcbs.route_committed = true
				c_tcbs.route_origin = signal
				-- determine route role
				local ndef = advtrains.ndb.get_ndef(c_tcbs.signal)
				local assign_dst = c_rseg.assign_dst
				if assign_dst == nil then
					assign_dst = (i~=1) -- special behavior when assign_dst is nil (and not false):
					-- defaults to false for the very first signal and true for all others (= minimal user configuration overhead)
				end
				local sig_table = {
					pos = c_tcbs.signal,
					tcbs_ref = c_tcbs,
					role = ndef and ndef.advtrains and ndef.advtrains.route_role,
					main_aspect = c_rseg.main_aspect,
					assign_dst = assign_dst
				}