50 lines
No EOL
1.2 KiB
Lua
50 lines
No EOL
1.2 KiB
Lua
local util = require("util")
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local bit32 = require("bit32")
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local nibbleArray = {}
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local defaultsTable = {
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array = {}
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}
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function nibbleArray:new(sizeOrTable)
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local newTable = util.deepCopyTable(defaultsTable) or {}
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if type(sizeOrTable) == "number" then
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for i = 1, sizeOrTable do
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table.insert(newTable.array, 0)
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end
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elseif type(sizeOrTable) == "table" then
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self.array = sizeOrTable
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end
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-- Set this table as this """class"""'s metatable
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setmetatable(newTable, self)
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self.__index = self
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return newTable
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end
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function nibbleArray:get(index)
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local arrayIndex = math.floor(index * 0.5)
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if bit32.band(index, 1) == 0 then
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return bit32.band(self.array[arrayIndex + 1], 0xf)
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else
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return bit32.band(bit32.rshift(self.array[arrayIndex + 1], 4), 0xf)
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end
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end
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function nibbleArray:set(index, value)
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local arrayIndex = math.floor(index * 0.5)
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if bit32.band(index, 1) == 0 then
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self.array[arrayIndex + 1] = bit32.bor(bit32.band(self.array[arrayIndex + 1], 0xf0), bit32.band(value, 0xf))
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else
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self.array[arrayIndex + 1] = bit32.bor(bit32.band(self.array[arrayIndex + 1], 0xf), bit32.rshift(bit32.band(value, 0xf), -4))
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end
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end
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function nibbleArray:toBuffer()
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return self.array
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end
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return nibbleArray |