Lua实现位运算 模块分析是本文要介绍的内容,主要是来学习LUA中的位运算,本文通过代码来实现位运算的操作,具体内容来看本文详解。
- --[[
- Description:
- FileName:bit.lua
- This module provides a selection of bitwise operations.
- History:
- Initial version created by 阵雨 2005-11-10.
- Notes:
- ....
- ]]
- --[[{2147483648,1073741824,536870912,268435456,134217728,67108864,33554432,16777216,
- 8388608,4194304,2097152,1048576,524288,262144,131072,65536,
- 32768,16384,8192,4096,2048,1024,512,256,128,64,32,16,8,4,2,1}
- ]]
- bit={data32={}}
- for i=1,32 do
- bit.data32[i]=2^(32-i)
- end
- function bit:d2b(arg)
- local tr={}
- for i=1,32 do
- if arg >= self.data32[i] then
- tr[i]=1
- argarg=arg-self.data32[i]
- else
- tr[i]=0
- end
- end
- return tr
- end --bit:d2b
- function bit:b2d(arg)
- local nr=0
- for i=1,32 do
- if arg[i] ==1 then
- nrnr=nr+2^(32-i)
- end
- end
- return nr
- end --bit:b2d
- function bit:_xor(a,b)
- local op1=self:d2b(a)
- local op2=self:d2b(b)
- local r={}
- for i=1,32 do
- if op1[i]==op2[i] then
- r[i]=0
- else
- r[i]=1
- end
- end
- return self:b2d(r)
- end --bit:xor
- function bit:_and(a,b)
- local op1=self:d2b(a)
- local op2=self:d2b(b)
- local r={}
- for i=1,32 do
- if op1[i]==1 and op2[i]==1 then
- r[i]=1
- else
- r[i]=0
- end
- end
- return self:b2d(r)
- end --bit:_and
- function bit:_or(a,b)
- local op1=self:d2b(a)
- local op2=self:d2b(b)
- local r={}
- for i=1,32 do
- if op1[i]==1 or op2[i]==1 then
- r[i]=1
- else
- r[i]=0
- end
- end
- return self:b2d(r)
- end --bit:_or
- function bit:_not(a)
- local op1=self:d2b(a)
- local r={}
- for i=1,32 do
- if op1[i]==1 then
- r[i]=0
- else
- r[i]=1
- end
- end
- return self:b2d(r)
- end --bit:_not
- function bit:_rshift(a,n)
- local op1=self:d2b(a)
- local r=self:d2b(0)
- if n < 32 and n > 0 then
- for i=1,n do
- for i=31,1,-1 do
- op1[i+1]=op1[i]
- end
- op1[1]=0
- end
- r=op1
- end
- return self:b2d(r)
- end --bit:_rshift
- function bit:_lshift(a,n)
- local op1=self:d2b(a)
- local r=self:d2b(0)
- if n < 32 and n > 0 then
- for i=1,n do
- for i=1,31 do
- op1[i]=op1[i+1]
- end
- op1[32]=0
- end
- r=op1
- end
- return self:b2d(r)
- end --bit:_lshift
- function bit:print(ta)
- local sr=""
- for i=1,32 do
- srsr=sr..ta[i]
- end
- print(sr)
- end
- bs=bit:d2b(7)
- bit:print(bs)
- -->00000000000000000000000000000111
- bit:print(bit:d2b(bit:_not(7)))
- -->11111111111111111111111111111000
- bit:print(bit:d2b(bit:_rshift(7,2)))
- -->00000000000000000000000000000001
- bit:print(bit:d2b(bit:_lshift(7,2)))
- -->00000000000000000000000000011100
- print(bit:b2d(bs)) --> 7
- print(bit:_xor(7,2)) --> 5
- print(bit:_and(7,4)) --> 4
- print(bit:_or(5,2)) --> 7
- --end of bit.lua
- 小结:关于Lua实现位运算 模块分析的内容介绍完了,希望通过本文的学习能对你有所帮助!关于Lua实现位运算 模块分析
- Lua实现位运算 模块分析是本文要介绍的内容,主要是来学习LUA中的位运算,本文通过代码来实现位运算的操作,具体内容来看本文详解。
- --[[
- Description:
- FileName:bit.lua
- This module provides a selection of bitwise operations.
- History:
- Initial version created by 阵雨 2005-11-10.
- Notes:
- ....
- ]]
- --[[{2147483648,1073741824,536870912,268435456,134217728,67108864,33554432,16777216,
- 8388608,4194304,2097152,1048576,524288,262144,131072,65536,
- 32768,16384,8192,4096,2048,1024,512,256,128,64,32,16,8,4,2,1}
- ]]
- bit={data32={}}
- for i=1,32 do
- bit.data32[i]=2^(32-i)
- end
- function bit:d2b(arg)
- local tr={}
- for i=1,32 do
- if arg >= self.data32[i] then
- tr[i]=1
- argarg=arg-self.data32[i]
- else
- tr[i]=0
- end
- end
- return tr
- end --bit:d2b
- function bit:b2d(arg)
- local nr=0
- for i=1,32 do
- if arg[i] ==1 then
- nrnr=nr+2^(32-i)
- end
- end
- return nr
- end --bit:b2d
- function bit:_xor(a,b)
- local op1=self:d2b(a)
- local op2=self:d2b(b)
- local r={}
- for i=1,32 do
- if op1[i]==op2[i] then
- r[i]=0
- else
- r[i]=1
- end
- end
- return self:b2d(r)
- end --bit:xor
- function bit:_and(a,b)
- local op1=self:d2b(a)
- local op2=self:d2b(b)
- local r={}
- for i=1,32 do
- if op1[i]==1 and op2[i]==1 then
- r[i]=1
- else
- r[i]=0
- end
- end
- return self:b2d(r)
- end --bit:_and
- function bit:_or(a,b)
- local op1=self:d2b(a)
- local op2=self:d2b(b)
- local r={}
- for i=1,32 do
- if op1[i]==1 or op2[i]==1 then
- r[i]=1
- else
- r[i]=0
- end
- end
- return self:b2d(r)
- end --bit:_or
- function bit:_not(a)
- local op1=self:d2b(a)
- local r={}
- for i=1,32 do
- if op1[i]==1 then
- r[i]=0
- else
- r[i]=1
- end
- end
- return self:b2d(r)
- end --bit:_not
- function bit:_rshift(a,n)
- local op1=self:d2b(a)
- local r=self:d2b(0)
- if n < 32 and n > 0 then
- for i=1,n do
- for i=31,1,-1 do
- op1[i+1]=op1[i]
- end
- op1[1]=0
- end
- r=op1
- end
- return self:b2d(r)
- end --bit:_rshift
- function bit:_lshift(a,n)
- local op1=self:d2b(a)
- local r=self:d2b(0)
- if n < 32 and n > 0 then
- for i=1,n do
- for i=1,31 do
- op1[i]=op1[i+1]
- end
- op1[32]=0
- end
- r=op1
- end
- return self:b2d(r)
- end --bit:_lshift
- function bit:print(ta)
- local sr=""
- for i=1,32 do
- srsr=sr..ta[i]
- end
- print(sr)
- end
- bs=bit:d2b(7)
- bit:print(bs)
- -->00000000000000000000000000000111
- bit:print(bit:d2b(bit:_not(7)))
- -->11111111111111111111111111111000
- bit:print(bit:d2b(bit:_rshift(7,2)))
- -->00000000000000000000000000000001
- bit:print(bit:d2b(bit:_lshift(7,2)))
- -->00000000000000000000000000011100
- print(bit:b2d(bs)) --> 7
- print(bit:_xor(7,2)) --> 5
- print(bit:_and(7,4)) --> 4
- print(bit:_or(5,2)) --> 7
0--end of bit.lua
小结:关于Lua实现位运算 模块分析的内容介绍完了,希望通过本文的学习能对你有所帮助!