From e6584db26da34572fb13aa236e16e19f71c8e976 Mon Sep 17 00:00:00 2001
From: dzwdz
Date: Fri, 26 Aug 2022 14:16:16 +0200
Subject: user/libc: prepare for OpenED port

---
 src/user/lib/ctype.c | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'src/user/lib/ctype.c')

diff --git a/src/user/lib/ctype.c b/src/user/lib/ctype.c
index b702703..7d3a707 100644
--- a/src/user/lib/ctype.c
+++ b/src/user/lib/ctype.c
@@ -29,3 +29,12 @@ int isupper(int c) {
 	return 'A' <= c && c <= 'Z';
 }
 
+int tolower(int c) {
+	if (isupper(c)) return c - 'A' + 'a';
+	return c;
+}
+
+int toupper(int c) {
+	if (islower(c)) return c - 'a' + 'A';
+	return c;
+}
-- 
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