strval_(const string[])
{
	new
		l = strlen(string),
		val;

	if(l > 10) 
		return 0;

	for(new i = l - 1, m = 1; i >= 0; i--, m*=10)
	{
		if(!('0' <= string[i] <= '9')) 
			return 0;
		
		new
			s_val = (string[i]-48)*m;	
		
		if(cellmax - val < s_val)
			return 0;
		
		val += s_val;
	}

	return val;	
}