sdk/dev/waitsync.c


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/*
 * Wait for a sync input value from a device.
 * $Id$
 * Copyright (c) 1997 by Tycho Softworks.
 * For conditions of distribution and reuse see product license.
 */

#include <dev/tty.h>

int	waitsync(int fd, uchar *list, size_t len, int timeout, ulong max)
{
	int	key;
	int	idx;
	uchar	buf;
		
	while(max--)
	{
		key = inkey(fd, timeout);
		if(key < 0)
			return key;
	
		buf = (uchar)(key & 0xff);
		
		for(idx = 0; idx < len; ++idx)
			if(list[idx] == buf)
				return buf;	
	}
	return -1;
}