136 lines
2.3 KiB
Lua
136 lines
2.3 KiB
Lua
--[[
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位操作
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]]
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--bit={data32={}}
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bit = bit or {}
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function bit.init32()
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bit.data32 = {}
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for i = 1, 32 do
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bit.data32[i] = 2 ^ (32 - i)
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end
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end
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bit.init32()
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function bit:d2b(arg) --bit:d2b
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local tr = {}
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for i = 1, 32 do
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if arg >= self.data32[i] then
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tr[i] = 1
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arg = arg - self.data32[i]
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else
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tr[i] = 0
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end
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end
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return tr
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end
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function bit:b2d(arg) --bit:b2d
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local nr = 0
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for i = 1, 32 do
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if arg[i] == 1 then
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nr = nr + 2 ^ (32 - i)
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end
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end
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return nr
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end
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function bit:_xor(a, b) --bit:xor
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local op1 = self:d2b(a)
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local op2 = self:d2b(b)
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local r = {}
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for i = 1, 32 do
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if op1[i] == op2[i] then
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r[i] = 0
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else
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r[i] = 1
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end
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end
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return self:b2d(r)
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end
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function bit:_and(a, b) --bit:_and
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local op1 = self:d2b(a)
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local op2 = self:d2b(b)
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local r = {}
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for i = 1, 32 do
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if op1[i] == 1 and op2[i] == 1 then
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r[i] = 1
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else
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r[i] = 0
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end
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end
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return self:b2d(r)
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end
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function bit:_or(a, b) --bit:_or
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local op1 = self:d2b(a)
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local op2 = self:d2b(b)
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local r = {}
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for i = 1, 32 do
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if op1[i] == 1 or op2[i] == 1 then
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r[i] = 1
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else
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r[i] = 0
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end
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end
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return self:b2d(r)
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end
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function bit:_not(a) --bit:_not
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local op1 = self:d2b(a)
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local r = {}
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for i = 1, 32 do
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if op1[i] == 1 then
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r[i] = 0
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else
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r[i] = 1
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end
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end
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return self:b2d(r)
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end
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function bit:_rshift(a, n) --bit:_rshift
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local op1 = self:d2b(a)
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local r = self:d2b(0)
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if n < 32 and n > 0 then
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for i = 1, n do
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for i = 31, 1, -1 do
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op1[i + 1] = op1[i]
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end
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op1[1] = 0
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end
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r = op1
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end
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return self:b2d(r)
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end
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function bit:_lshift(a, n) --bit:_lshift
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local op1 = self:d2b(a)
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local r = self:d2b(0)
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if n < 32 and n > 0 then
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for i = 1, n do
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for i = 1, 31 do
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op1[i] = op1[i + 1]
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end
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op1[32] = 0
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end
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r = op1
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end
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return self:b2d(r)
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end
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function bit:print(ta)
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local sr = ""
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for i = 1, 32 do
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sr = sr .. ta[i]
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end
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-- print(sr)
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end
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