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Re: parse_time()
From: |
Bruce Korb |
Subject: |
Re: parse_time() |
Date: |
Sun, 2 Nov 2008 11:18:27 -0800 |
Hi Bruno,
On Sun, Nov 2, 2008 at 10:52 AM, Bruno Haible <address@hidden> wrote:
> Hi,
>
> Bruce Korb wrote:
>> I had need of a function to convert some variation of a time (duration)
>> specification into a count of seconds. For your amusement and optional
>> inclusion...(I *think* I've got papers on file for gnulib....)
>>
>> It accepts several formats:
>>
>> [DD d] [HH h] [MM m] [SS s]
>> [DD d] [[HH:]MM:]SS
>> [DD d] [HH h] [MM:]SS
>>
>> though it is unhappy if it finds nothing.
>
> Yes, I think if several programs can agree to parse durations in the same
> way, this can only be beneficial.
My motivation was that I noticed that someone implemented what I implemented
as ``timed-task'' as ``timeout'' and I used basically this code to parse the
"how long should I wait" option. Though "timeout" only accepts it as
an operand.
> Looking at wikipedia [1], I would find it good if
> 1) the function was called 'parse_duration', not 'parse_time' (since "time"
> often denotes a time instant within a day),
Sure. My coin landed "heads" instead of "tails" when I was deciding.
> 2) the three duration formats described in [1] were also supported.
3? I only see one, though with lots of optional fields. That format also
doesn't allow for visual space. Anyway, it's trivial enough to look for a
string starting with 'P' or 'T' and handle the ISO-8601 duration.
The little question remaining though is "how many seconds in a year"
and, more importantly, "how many seconds in a month"? In other words,
if some one in February were expecting P1M to represent a 28 day duration
and a 31 day duration had it been March, um, well, I think maybe they should
implement it. :) Dealing with "leap seconds" would get extremely
over the top.
Cheers - Bruce
- parse_time(), Bruce Korb, 2008/11/01
- Re: parse_time(), Bruno Haible, 2008/11/02
- Re: parse_time(),
Bruce Korb <=
- Re: parse_time(), Bruno Haible, 2008/11/02
- Re: parse_duration(), Bruce Korb, 2008/11/02
- Re: parse_duration(), Bruno Haible, 2008/11/03
- Re: parse_duration(), Bruce Korb, 2008/11/04
- Re: parse_duration(), Bruno Haible, 2008/11/05
- Re: parse_duration(), Bruce Korb, 2008/11/05
- Re: parse_duration(), Bruce Korb, 2008/11/16
- Re: parse_duration(), Bruno Haible, 2008/11/17
Re: parse_time(), Bruce Korb, 2008/11/02