21 lines
433 B
Lua
21 lines
433 B
Lua
local Util = {}
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function Util.toHexChar(v)
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return ("0123456789ABCDEF"):sub(v, v)
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end
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function Util.fromHexChar(c)
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local index = ({("0123456789ABCDEF"):find(c)})[1]
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if index ~= nil then
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return index - 1
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end
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return nil
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end
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function Util.boundCheck(x, y, w, h)
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if x < 1 or x > w or y < 1 or y > h then
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error(("Index out of range: (%d %d) is not within ([1,%d], [1,%d])"):format(x, y, w, h))
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end
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end
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return Util |