File: utime

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if (word(2 $loadinfo()) != [pf]) { load -pf $word(1 $loadinfo()); return; };

#
# Here's the plan
# Kanan wants a way to manipulate $utime() values.  Because theyre 
# thrown about as two words, we cant actually have the math parser
# handle them automatically (alas), and writing built in functions
# just to do this seems like overkill.  So i wrote these aliases for
# his (and your) convenience.  Use this is as a starting point for you
# own alias needs, or drop me a line if you have more suggestions.
# (jnelson@acronet.net)
#

#
# Add two utimes.
#
alias utime_add 
{
	local sec,usec;
	@ sec = [$0] + [$2];
	@ usec = [$1] + [$3];
	if (usec > 1000000)
	{
		@ usec -= 1000000, sec++;
	};
	@ function_return = sec ## [ ] ## right(6 000000$usec);
};

#
# Subtract two utimes.  The LARGER utime (the more recent) should
# be the first one specified
#
alias utime_sub
{
	local sec,usec;
	@ sec = [$0] - [$2];
	@ usec = [$1] - [$3];
	if (usec < 0)
	{
		@ usec += 1000000, sec--;
	};
	@ function_return = sec ## [ ] ## right(6 000000$usec);
};

#
# You pass a utime as $0, $1, and this function will return
# how many useconds have passed since then.
#
alias time_since
{
	local now $utime();
	@ function_return = utime_sub($now $0 $1);
};

#hop'97