From dab5eb9aa085f25232e6ebbc09a2f60cb3bf2df0 Mon Sep 17 00:00:00 2001
From: CTCaer <ctcaer@gmail.com>
Date: Sat, 6 Jan 2024 21:52:48 +0200
Subject: [PATCH] bdk: sprintf: do not accept null chars

Skip NULL chars on putc since they break the resulted string.
---
 bdk/utils/sprintf.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/bdk/utils/sprintf.c b/bdk/utils/sprintf.c
index 87f1526..c1e382c 100644
--- a/bdk/utils/sprintf.c
+++ b/bdk/utils/sprintf.c
@@ -112,7 +112,9 @@ void s_printf(char *out_buf, const char *fmt, ...)
 			switch (*fmt)
 			{
 			case 'c':
-				_s_putc(va_arg(ap, u32));
+				char c = va_arg(ap, u32);
+				if (c != '\0')
+					_s_putc(c);
 				break;
 			case 's':
 				_s_puts(va_arg(ap, char *));