From 93ca0c4a5e040baacfdda495439c4a21467e0e51 Mon Sep 17 00:00:00 2001
From: r00ster91 <r00ster91@proton.me>
Date: Sun, 14 Aug 2022 21:05:37 +0200
Subject: [PATCH] fix: off-by-one in `isCntrl`

0x1F (`control_code.us`) itself is also a control code.
---
 lib/std/ascii.zig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/std/ascii.zig b/lib/std/ascii.zig
index 4a4564d3d7..663f7df94f 100644
--- a/lib/std/ascii.zig
+++ b/lib/std/ascii.zig
@@ -232,7 +232,7 @@ pub fn isAlpha(c: u8) bool {
 }
 
 pub fn isCntrl(c: u8) bool {
-    return c < 0x20 or c == 127; //DEL
+    return c <= control_code.us or c == control_code.del;
 }
 
 pub fn isDigit(c: u8) bool {