Byte Count Formatting

bcfmt.go

package util

import "fmt"

type ByteCount uint64

func (bc ByteCount) String() string {
	const (
		unitNames = "BKMGTPE" // E is sufficient for 64 bit values
		maxValue  = 1024
	)
	value, i := float64(bc), 0
	for ; i < len(unitNames); i++ {
		if value < maxValue {
			break
		}
		value /= maxValue
	}
	unit := string(unitNames[i])
	if i > 0 {
		unit += "i" + string(unitNames[0])
	}
	return fmt.Sprintf("%.2f %v", value, unit)
}