handle file encoding ascii correctly

bnn.go

@@ -6,6 +6,8 @@ import (
 	"os"
 	"strconv"
 	"strings"
+
+	"golang.org/x/text/encoding/charmap"
 )
 
 // Info Structure of headline
@@ -145,6 +147,13 @@ func ReadBnn(r io.Reader) (Bnn, error) {
 	for i, line := range lines {
 		var item Item
 
+		// Encoding ASCII
+		// Example file for ASCII was provided by Paxan
+		// Extended ASCII has been used -> ä 132 \u0084
+		if strings.Split(line, ";")[2] == "0" {
+			line, _ = charmap.CodePage850.NewDecoder().String(line)
+		}
+
 		col := strings.Split(line, ";")
 
 		// Headline contains infos