mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-12-23 18:52:11 +00:00
33 lines
524 B
Go
33 lines
524 B
Go
package hashmap
|
|
|
|
import (
|
|
"strconv"
|
|
)
|
|
|
|
const (
|
|
// intSizeBytes is the size in byte of an int or uint value.
|
|
intSizeBytes = strconv.IntSize >> 3
|
|
)
|
|
|
|
// roundUpPower2 rounds a number to the next power of 2.
|
|
func roundUpPower2(i uintptr) uintptr {
|
|
i--
|
|
i |= i >> 1
|
|
i |= i >> 2
|
|
i |= i >> 4
|
|
i |= i >> 8
|
|
i |= i >> 16
|
|
i |= i >> 32
|
|
i++
|
|
return i
|
|
}
|
|
|
|
// log2 computes the binary logarithm of x, rounded up to the next integer.
|
|
func log2(i uintptr) uintptr {
|
|
var n, p uintptr
|
|
for p = 1; p < i; p += p {
|
|
n++
|
|
}
|
|
return n
|
|
}
|