Function bucketStep

map.go:882–885

bucketStep is the number of buckets to step over in the buckets directory to reach the next different bucket. A bucket occupies 1 or more contiguous entries in the buckets directory specified by the range: [b.index:b.index+bucketStep(m.globalDepth(), b.localDepth)]

(globalDepth, localDepth uint32)

//
//	[b.index:b.index+bucketStep(m.globalDepth(), b.localDepth)]
func bucketStep(globalDepth, localDepth uint32) uint32 {
	const shiftMask = 31
	return uint32(1) << ((globalDepth - localDepth) & shiftMask)
}

// adjustBucketIndex adjusts the index of a bucket to account for the growth
// of the directory where index was captured at originalGlobalDepth and we're