goext/langext/bytes.go

47 lines
827 B
Go

package langext
import (
"errors"
"fmt"
)
func FormatBytesToSI(b uint64) string {
const unit = 1000
if b < unit {
return fmt.Sprintf("%d B", b)
}
div, exp := uint64(unit), 0
for n := b / unit; n >= unit; n /= unit {
div *= unit
exp++
}
return fmt.Sprintf("%.1f %cB", float64(b)/float64(div), "kMGTPE"[exp])
}
func BytesXOR(a []byte, b []byte) ([]byte, error) {
if len(a) != len(b) {
return nil, errors.New("length mismatch")
}
r := make([]byte, len(a))
for i := 0; i < len(a); i++ {
r[i] = a[i] ^ b[i]
}
return r, nil
}
func FormatBytes(b int64) string {
const unit = 1024
if b < unit {
return fmt.Sprintf("%d B", b)
}
div, exp := int64(unit), 0
for n := b / unit; n >= unit; n /= unit {
div *= unit
exp++
}
return fmt.Sprintf("%.1f %ciB", float64(b)/float64(div), "KMGTPE"[exp])
}