/*
 * 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;
}