32 lines
1.0 KiB
Lua
32 lines
1.0 KiB
Lua
-- cdlib by t20kdc, from https://github.com/20kdc/OC-Copper/blob/master/cdlib.lua
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-- modified for PsychOS by Izaya
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_G.cdlib = {}
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function cdlib.encodeName(name)
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if name:len() > 256 then error("Bad name (l>256)") end
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if name == "" then error("No name") end
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return string.char(name:len() - 1) .. name
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end
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function cdlib.decodeName(message)
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if message:len() < 2 then return end
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local nlen = message:byte(1) + 1
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local fnam = message:sub(2, nlen + 1)
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if fnam:len() < nlen then return end
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return fnam, message:sub(nlen + 2)
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end
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function cdlib.decodeNoHops(data)
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local src, data = cdlib.decodeName(data)
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if not src then return end
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local dst, data = cdlib.decodeName(data)
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if not dst then return end
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return src, dst, data
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end
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function cdlib.encode(hops, src, dst, data)
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return string.char(hops) .. cdlib.encodeName(src) .. cdlib.encodeName(dst) .. data
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end
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function cdlib.decode(d)
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if d:len() < 3 then return end
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local src, dst, data = cdlib.decodeNoHops(d:sub(2))
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if not data then return end
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return d:byte(1), src, dst, data
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end
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