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package bits
// IsOn returns true if *all* bits set in 'bits' are set in 'mask'.
func IsOn64(mask, bits uint64) bool {
return mask&bits == bits
}
// IsAnyOn returns true if *any* bit set in 'bits' is set in 'mask'.
func IsAnyOn64(mask, bits uint64) bool {
return mask&bits != 0
}
// Mask returns a T with all of the given bits set.
func Mask64(is ...int) uint64 {
ret := uint64(0)
for _, i := range is {
ret |= MaskOf64(i)
}
return ret
}
// MaskOf is like Mask, but sets only a single bit (more efficiently).
func MaskOf64(i int) uint64 {
return uint64(1) << uint64(i)
}
// IsPowerOfTwo returns true if v is power of 2.
func IsPowerOfTwo64(v uint64) bool {
if v == 0 {
return false
}
return v&(v-1) == 0
}
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