From 7f919025ee56cfbdc5b3e6cab88d43cbdcae58e1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C5=99emysl=20Eric=20Janouch?= <p@janouch.name>
Date: Fri, 2 Oct 2020 06:31:11 +0200
Subject: [PATCH] Add iscntrl_ascii()

It's too easy to miss the DEL character.
---
 liberty.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/liberty.c b/liberty.c
index 6a771be..6f44df0 100644
--- a/liberty.c
+++ b/liberty.c
@@ -2672,6 +2672,12 @@ strncasecmp_ascii (const char *a, const char *b, size_t n)
 	return 0;
 }
 
+static bool
+iscntrl_ascii (int c)
+{
+	return (c >= 0 && c < 32) || c == 0x7f;
+}
+
 static bool
 isalpha_ascii (int c)
 {