dofile() help

[cgruber]

Code: Select all

function LoadLevel()

num_moves=0
levelnum = tostring(level)
map=string.format("%s%s", "./levels/", levelnum)
map=string.format("%s%s", map, ".lua")
if(io.open(map, r)==nil) then --open the file first to make sure it's there
	level=1 --wrap back to start
	gamefield=nil
	screen.waitVblankStart(60)  --short delay
	LoadLevel(1) --call yourself to load first level since we ran out.
	io.close()
else  -- yep it's there better close it
	io.close()
	gamefield=nil
	if(level~=1) then 
	screen.waitVblankStart(60) --short delay
	end
	dofile(map)
	mappos=StartupPosition()
	return 1
end

end

This is my load level code which works perfectly for the first 10 times.
My game will always crash on the 11th time dofile is called. It's not the specific 11th file because I've changed that to one that works for a previous load.

error: cannot read ./levels/11.lua
Error: No script file found.

Press start to restart

[LuMo]

maybe a dumb question...
is 11.lua in the folder ./levels/ ?

[cgruber]

Yes it is..Seems the problem is with io.open()

If I remove it i can get more than 10 calls, but why can i only call io.open 10 times?

[LuMo]

i am not that deep into lua (even getting weird results sometimes due lua-specific stuff)

pil uses this example:

Code: Select all

file, msg = io.open(name, "r")
if not file then print(msg) end

and they are not even closing the io.open again...

would be sick but may it be ur missing colons?

Code: Select all

io.open(name, r)

i'll try too, cause i will load levels from files too (but my aim is bit differen... not executing lua files, importin' and parsing files)

greets
Lumo

[Shine]

pil uses this example:

Code: Select all

file, msg = io.open(name, "r")
if not file then print(msg) end

and they are not even closing the io.open again...

I think files are GC'ed and then closed automaticly, but should be better to close it. If you open too many files and they are not GC'ed, opening the next file will cause an error.

I'm using this for loading and saving the options in Snake, which are all strings, except "speed", which results in the hack in loadOptions :-)

Code: Select all

options = { speed = 2, level = "desert", music = "on", sound = "on" }

function saveOptions()
	file = io.open(optionsFile, "w")
	if file then
		for key, value in options do
			file:write(key .. "=" .. value .. "\n")
		end
		file:close()
	end
end

function loadOptions()
	file = io.open(optionsFile, "r")
	if file then
		for line in file:lines() do
			equal = string.find(line, "=")
			if equal then
				key = string.sub(line, 1, equal - 1)
				value = string.sub(line, equal + 1)
				if key == "speed" then value = tonumber(value) end
				options[key] = value
			end
		end
		file:close()
	end
end