这段代码是把存储单位转换通过移位运算得出需要的结果.源码来自于Google的开源项目zoekt.api.go
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func (s Stats) HumanBytesLoaded() string {
suffix := ""
b := s.BytesLoaded
if s.BytesLoaded > (1 << 30) {
suffix = "G"
b = s.BytesLoaded / (1 << 30)
} else if s.BytesLoaded > (1 << 20) {
suffix = "M"
b = s.BytesLoaded / (1 << 20)
} else if s.BytesLoaded > (1 << 10) {
suffix = "K"
b = s.BytesLoaded / (1 << 10)
}
return fmt.Sprintf("%d%s", b, suffix)
}
b := s.BytesLoaded的值是byte的单位:
- 1GB=102410241024=1«30=1073741824
- 1MB=1024*1024=1«20=1048576
- 1KB=1«10=1024
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//测试代码
package main
import (
"fmt"
"os"
"strconv"
)
func main() {
var com string
value,_:=strconv.ParseInt(os.Args[1],10,64)
com = load(value)
fmt.Printf("%s", com)
}
func load(s int64) string {
suffix := ""
b := s
if s > (1 << 30) {
suffix = "G"
b = s / (1 << 30)
} else if s > (1 << 20) {
suffix = "M"
b = s / (1 << 20)
} else if s > (1 << 10) {
suffix = "K"
b = s / (1 << 10)
}
return fmt.Sprintf("%d%s\n", b, suffix)
}
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//运行测试
➜ /home/sec/go/src/main >go run byte.go 10000000
9M
参考资料: