frostfs-sdk-go/container/acl/util.go

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package acl
import "fmt"
// sets n-th bit in num (starting at 0).
func setBit(num *uint32, n uint8) {
*num |= 1 << n
}
// checks if n-th bit in num is set (starting at 0).
func isBitSet(num uint32, n uint8) bool {
mask := uint32(1 << n)
return mask != 0 && num&mask == mask
}
// maps Op to op-section index in Basic. Filled on init.
var mOrder map[Op]uint8
// sets n-th bit in num for the given op. Panics if op is unsupported.
func setOpBit(num *uint32, op Op, opBitPos uint8) {
n, ok := mOrder[op]
if !ok {
panic(fmt.Sprintf("op is unsupported %v", op))
}
setBit(num, n*bitsPerOp+opBitPos)
}
// checks if n-th bit in num for the given op is set. Panics if op is unsupported.
func isOpBitSet(num uint32, op Op, n uint8) bool {
off, ok := mOrder[op]
if !ok {
panic(fmt.Sprintf("op is unsupported %v", op))
}
return isBitSet(num, bitsPerOp*off+n)
}