From af0410191e7e2dd956870175f894440cb51267c1 Mon Sep 17 00:00:00 2001
From: Heiko Schaefer <heiko@schaefer.name>
Date: Fri, 25 Feb 2022 11:31:29 +0100
Subject: [PATCH] Implement Display for Lang

---
 openpgp-card/src/card_do.rs | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/openpgp-card/src/card_do.rs b/openpgp-card/src/card_do.rs
index d389767..16d767b 100644
--- a/openpgp-card/src/card_do.rs
+++ b/openpgp-card/src/card_do.rs
@@ -4,8 +4,8 @@
 //! OpenPGP card data objects (DO)
 
 use chrono::{DateTime, Utc};
-use std::convert::TryFrom;
-use std::convert::TryInto;
+use std::convert::{TryFrom, TryInto};
+use std::fmt::{Display, Formatter};
 use std::time::{Duration, UNIX_EPOCH};
 
 use crate::{algorithm::Algo, tlv::Tlv, Error, KeySet, KeyType};
@@ -304,6 +304,19 @@ pub enum Lang {
     Invalid(u8),
 }
 
+impl Display for Lang {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::Value(v) => {
+                write!(f, "{}{}", v[0] as char, v[1] as char)
+            }
+            Self::Invalid(v) => {
+                write!(f, "{:x?}", v)
+            }
+        }
+    }
+}
+
 impl From<(char, char)> for Lang {
     fn from(c: (char, char)) -> Self {
         Lang::Value([c.0 as u8, c.1 as u8])