From 804dc305de16778422c229a89b77b632f6e8d44e Mon Sep 17 00:00:00 2001
From: raspi <pekka.jarvinen@gmail.com>
Date: Tue, 31 Dec 2019 14:45:21 +0200
Subject: [PATCH] use string length

---
 pkg/display/hex.go | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/pkg/display/hex.go b/pkg/display/hex.go
index 1482d30..806ac15 100644
--- a/pkg/display/hex.go
+++ b/pkg/display/hex.go
@@ -5,7 +5,6 @@ import (
 	clr "github.com/logrusorgru/aurora"
 	"github.com/raspi/heksa/pkg/iface"
 	"io"
-	"math/bits"
 	"strings"
 )
 
@@ -14,9 +13,9 @@ Hex displays bytes in hexadecimal format 00-ff.
 */
 type Hex struct {
 	fs        uint64 // File size
-	bw        uint8  // Bit width calculated from file size
 	offFormat string // Format for offset column
 	sb        strings.Builder
+	zeroes    int
 }
 
 func NewHex() *Hex {
@@ -28,8 +27,12 @@ func NewHex() *Hex {
 
 func (d *Hex) SetFileSize(s int64) {
 	d.fs = uint64(s)
-	d.bw = nearest(uint8(bits.Len64(d.fs)))
-	d.offFormat = fmt.Sprintf(`%%0%vx`, d.bw/8)
+	d.zeroes = len(fmt.Sprintf(`%x`, d.fs))
+	if d.zeroes&1 != 0 {
+		d.zeroes++
+	}
+
+	d.offFormat = fmt.Sprintf(`%%0%vx`, d.zeroes)
 }
 
 func (d *Hex) Format(b byte, color clr.Color) string {
@@ -51,7 +54,7 @@ func (d *Hex) EofStr() string {
 }
 
 func (d *Hex) OffsetHeader() string {
-	return strings.Repeat(`_`, int(d.bw/8))
+	return strings.Repeat(`_`, d.zeroes)
 }
 
 func (d *Hex) Header() string {