From 0cc9b20c15460213e488bf5e70963b941482f628 Mon Sep 17 00:00:00 2001
From: William Harrington <kb0iic@berzerkula.org>
Date: Tue, 14 Jan 2025 16:06:02 -0600
Subject: Add source.

---
 sdk/dev/waitfor.c | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 sdk/dev/waitfor.c

(limited to 'sdk/dev/waitfor.c')

diff --git a/sdk/dev/waitfor.c b/sdk/dev/waitfor.c
new file mode 100644
index 0000000..36fabec
--- /dev/null
+++ b/sdk/dev/waitfor.c
@@ -0,0 +1,39 @@
+/*
+ * Wait for specified input from device.
+ * $Id$
+ * Copyright (c) 1997 by Tycho Softworks.
+ * For conditions on redistribution and reuse see product license.
+ */
+
+#include <dev/tty.h>
+#include <std/string.h>
+
+int	waitfor(int fd, uchar *list, size_t len, int timeout, ulong max)
+{
+	int	key;
+	int	idx = 0;
+	uchar	*mem = (uchar *)malloc(len);
+		
+	while(max--)
+	{
+		key = inkey(fd, timeout);
+		if(key < 0)
+			return key;
+
+		if(idx < len)
+			mem[idx++] = (uchar)(key & 0xff);
+		else
+		{
+			for(idx = 0; idx < len; ++idx)
+				mem[idx] = mem[idx + 1];
+			
+			mem[len - 1] = (uchar)(key & 0xff);	
+		}	
+		if(!memcmp(mem, list, len))
+			return 0;
+	}
+	return -1;
+}
+
+				
+			 
-- 
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