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Bit Manipulation Functions (4)

By ofer bester,

Execute / Usage example script:

declare @BitMap BIGINT
declare @bitNo TINYINT

set @BitMap = 0
set @bitNo = 55

print '- Bit # = '+CONVERT(VARCHAR,@bitNo)+ ', BitMap value = '+ CONVERT(VARCHAR,@BitMap)
print ' Check bit #'+CONVERT(VARCHAR,@bitNo)
+' - Is bit ON = '+ CONVERT(VARCHAR,dbo.fnBitIsOn(@BitMap, @bitNo))
+', Value ='+ CONVERT(VARCHAR,@BitMap)

set @BitMap = dbo.fnBitSetOn(@BitMap, @bitNo)
print ' Turn bit #'+CONVERT(VARCHAR,@bitNo) +' ON'+
+' - Is bit ON = '+ CONVERT(VARCHAR,dbo.fnBitIsOn(@BitMap, @bitNo))
+', Value ='+ CONVERT(VARCHAR,@BitMap)

set @BitMap = dbo.fnBitSetOff(@BitMap, @bitNo)
print ' Turn bit #'+ CONVERT(VARCHAR,@bitNo) +' OFF'
+' - Is bit ON = '+ CONVERT(VARCHAR,dbo.fnBitIsOn(@BitMap, @bitNo))
+', Value ='+ CONVERT(VARCHAR,@BitMap)

set @BitMap = dbo.fnBitToggle(@BitMap, @bitNo)
print ' Toggle bit #'+ CONVERT(VARCHAR,@bitNo)
+' - Is bit ON = '+ CONVERT(VARCHAR,dbo.fnBitIsOn(@BitMap, @bitNo))
+', Value ='+ CONVERT(VARCHAR,@BitMap)
set @BitMap = dbo.fnBitToggle(@BitMap, @bitNo)
print ' Toggle bit #'+ CONVERT(VARCHAR,@bitNo)
+' - Is bit ON = '+ CONVERT(VARCHAR,dbo.fnBitIsOn(@BitMap, @bitNo))
+', Value ='+ CONVERT(VARCHAR,@BitMap)

print ''
set @BitMap = -1

print '- Bit # = '+CONVERT(VARCHAR,@bitNo)+ ', BitMap value = '+ CONVERT(VARCHAR,@BitMap)
set @BitMap = dbo.fnBitSetOn(@BitMap, @bitNo)
print ' Turn bit #'+CONVERT(VARCHAR,@bitNo) +' ON'+
+' - Is bit ON = '+ CONVERT(VARCHAR,dbo.fnBitIsOn(@BitMap, @bitNo))
+', Value ='+ CONVERT(VARCHAR,@BitMap)

set @BitMap = dbo.fnBitSetOff(@BitMap, @bitNo)
print ' Turn bit #'+ CONVERT(VARCHAR,@bitNo) +' OFF'
+' - Is bit ON = '+ CONVERT(VARCHAR,dbo.fnBitIsOn(@BitMap, @bitNo))
+', Value ='+ CONVERT(VARCHAR,@BitMap)

set @BitMap = dbo.fnBitToggle(@BitMap, @bitNo)
print ' Toggle bit #'+ CONVERT(VARCHAR,@bitNo)
+' - Is bit ON = '+ CONVERT(VARCHAR,dbo.fnBitIsOn(@BitMap, @bitNo))
+', Value ='+ CONVERT(VARCHAR,@BitMap)
set @BitMap = dbo.fnBitToggle(@BitMap, @bitNo)
print ' Toggle bit #'+ CONVERT(VARCHAR,@bitNo)
+' - Is bit ON = '+ CONVERT(VARCHAR,dbo.fnBitIsOn(@BitMap, @bitNo))
+', Value ='+ CONVERT(VARCHAR,@BitMap)

 

Result:

- Bit # = 55, BitMap value = 0
Check bit #55 - Is bit ON = 0, Value =0
Turn bit #55 ON - Is bit ON = 1, Value =36028797018963968
Turn bit #55 OFF - Is bit ON = 0, Value =0
Toggle bit #55 - Is bit ON = 1, Value =36028797018963968
Toggle bit #55 - Is bit ON = 0, Value =0

- Bit # = 55, BitMap value = -1
Turn bit #55 ON - Is bit ON = 1, Value =-1
Turn bit #55 OFF - Is bit ON = 0, Value =-36028797018963969
Toggle bit #55 - Is bit ON = 1, Value =-1
Toggle bit #55 - Is bit ON = 0, Value =-36028797018963969

Total article views: 1030 | Views in the last 30 days: 4
 
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Tags
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