lua封装的位运算

 1 --与   同为1，则为1  
 2    
 3 --或   有一个为1，则为1    
 4   
 5 --非   true为 false，其余为true  
 6   
 7 --异或 相同为0，不同为1  
 8   
 9   
10 --ZZMathBit = {}  
11   
12 function ZZMathBit.__andBit(left,right)    --与  
13     return (left == 1 and right == 1) and 1 or 0  
14 end  
15   
16 function ZZMathBit.__orBit(left, right)    --或  
17     return (left == 1 or right == 1) and 1 or 0  
18 end  
19   
20 function ZZMathBit.__xorBit(left, right)   --异或  
21     return (left + right) == 1 and 1 or 0  
22 end  
23   
24 function ZZMathBit.__base(left, right, op) --对每一位进行op运算，然后将值返回  
25     if left < right then  
26         left, right = right, left  
27     end  
28     local res = 0  
29     local shift = 1  
30     while left ~= 0 do  
31         local ra = left % 2    --取得每一位(最右边)  
32         local rb = right % 2     
33         res = shift * op(ra,rb) + res  
34         shift = shift * 2  
35         left = math.modf( left / 2)  --右移  
36         right = math.modf( right / 2)  
37     end  
38     return res  
39 end  
40   
41 function ZZMathBit.andOp(left, right)  
42     return ZZMathBit.__base(left, right, ZZMathBit.__andBit)  
43 end  
44   
45 function ZZMathBit.xorOp(left, right)  
46     return ZZMathBit.__base(left, right, ZZMathBit.__xorBit)  
47 end  
48   
49 function ZZMathBit.orOp(left, right)  
50     return ZZMathBit.__base(left, right, ZZMathBit.__orBit)  
51 end  
52   
53 function ZZMathBit.notOp(left)  
54     return left > 0 and -(left + 1) or -left - 1  
55 end  
56   
57 function ZZMathBit.lShiftOp(left, num)  --left左移num位  
58     return left * (2 ^ num)  
59 end  
60   
61 function ZZMathBit.rShiftOp(left,num)  --right右移num位  
62     return math.floor(left / (2 ^ num))  
63 end  
64   
65 function ZZMathBit.test()  
66     print( ZZMathBit.andOp(65,0x3f))  --65 1000001    63 111111  
67     print(65 % 64)  
68     print( ZZMathBit.orOp(5678,6789))  
69     print( ZZMathBit.xorOp(13579,2468))  
70     print( ZZMathBit.rShiftOp(16,3))  
71     print( ZZMathBit.notOp(-4))  
72   
73     print(string.byte("abc",1))  
74 end  
75 cclog("aaaaaaa:")  
76 ZZMathBit.test() 

1 function GlobalService:hasRedpointEmail( )  
2     return ZZMathBit.andOp( ServerData.redPointStatus, dyt.RedPointStatus.Email )  ~= 0  
3 end 

 1 -- 红点状态  
 2 dyt.RedPointStatus = {  
 3     Email = ZZMathBit.lShiftOp( 1, 0 ),  --邮件  
 4     DailyTask = ZZMathBit.lShiftOp( 1, 1),  -- 每日任务  
 5     CommonTask = ZZMathBit.lShiftOp( 1, 2 ), --任务  
 6     Draw = ZZMathBit.lShiftOp( 1, 3 ), --抽卡  
 7     Sign = ZZMathBit.lShiftOp( 1, 4 ), --签到  
 8     Activity = ZZMathBit.lShiftOp( 1, 5 ), --7日活动  
 9     Legion = ZZMathBit.lShiftOp( 1, 6 ), --军团  
10     Escort = ZZMathBit.lShiftOp( 1, 7 ), --护航  
11     Collect = ZZMathBit.lShiftOp( 1, 9 ), --委派  
12     Union = ZZMathBit.lShiftOp( 1 , 10 ), --联动  
13     SingleRecharge = ZZMathBit.lShiftOp( 1 , 11 ), --限时活动单笔充值  
14     TotalRecharge = ZZMathBit.lShiftOp( 1 , 12 ), --限时活动累计充值  
15     TotalCost = ZZMathBit.lShiftOp( 1 , 13 ), --限时活动累计消费  
16     OilCost = ZZMathBit.lShiftOp( 1 , 14 ), --限时活动燃油消耗  
17     TotalDraw = ZZMathBit.lShiftOp( 1 , 15 ), --限时活动金币抽卡  
18     Qming = ZZMathBit.lShiftOp( 1 , 16 ), --限时活动清明好礼  
19     BaoXiang = ZZMathBit.lShiftOp( 1 , 19 ), --限时活动金币抽卡宝箱  
20     LevelFast = ZZMathBit.lShiftOp( 1 , 20 ), --快速补给活动  
21     LevelFastRed = ZZMathBit.lShiftOp( 1 , 21 ), --快速补给活动红点  
22 }