26 lines
474 B
Go
26 lines
474 B
Go
|
package util
|
||
|
|
|
||
|
|
//IsBitSet bit is from 0 to 31
|
||
|
|
func IsBitSet(attr int, bit uint) bool {
|
||
|
|
return IsBitSet64(int64(attr), bit)
|
||
|
|
}
|
||
|
|
|
||
|
|
// IsBitSet64 bit is from 0 to 63
|
||
|
|
func IsBitSet64(attr int64, bit uint) bool {
|
||
|
|
if bit >= 64 {
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
|
||
|
|
return (attr & (1 << bit)) != 0
|
||
|
|
}
|
||
|
|
|
||
|
|
//SetBit64 set bit to 1
|
||
|
|
func SetBit64(attr int64, bit uint) int64 {
|
||
|
|
return attr | (1 << bit)
|
||
|
|
}
|
||
|
|
|
||
|
|
//UnSetBit64 set bit to 0
|
||
|
|
func UnSetBit64(attr int64, bit uint) int64 {
|
||
|
|
return attr & ^(1 << bit)
|
||
|
|
}
|