mfer/internal/cli/misc.go

package cli

import "fmt"

// FIXME make this write to a bytes.Buffer with fprintf
func DumpByteSlice(b []byte) {
	var a [16]byte
	n := (len(b) + 15) &^ 15
	for i := 0; i < n; i++ {
		if i%16 == 0 {
			fmt.Printf("%4d", i)
		}
		if i%8 == 0 {
			fmt.Print(" ")
		}
		if i < len(b) {
			fmt.Printf(" %02X", b[i])
		} else {
			fmt.Print("   ")
		}
		if i >= len(b) {
			a[i%16] = ' '
		} else if b[i] < 32 || b[i] > 126 {
			a[i%16] = '.'
		} else {
			a[i%16] = b[i]
		}
		if i%16 == 15 {
			fmt.Printf("  %s\n", string(a[:]))
		}
	}
}