add a time interval to a timestamp

[Loris Fichera]

Hello everybody,

Say I want to write a function that takes as input a timestamp (in the
form {{y,m,d}, {h,m,s}} ) and returns another timestamp, obtained by
adding a certain amount of {hours, minutes, seconds} to the input.

It wouldn't be difficult but, since I'm dealing with tuples, I wouldn't
have any guarantee on the validity of the obtained timestamp, e.g. I
could have obtained something like {{2011,02,30},{...}}. In such cases,
the calendar:valid_date/1 and calendar:last_day_of_the_month/2 would be
useful.

I was just wondering if there already exists a function that does such a
work. :)

Thanks in advance.
-- 
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[ Loris Fichera a.k.a. kid_a  |  HOME http://www.bakerstreet.it  ]
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