[PD-dev] common date format for Pd

[Thomas Grill]

Hi all,
it may depend on the actual application, but generally i don't think  
that symbols are a good idea.
Every generated symbol uses an entry in the symbol table and stays in  
memory until PD is restarted, which effectively is a memory leak for  
varying data.
Since i use messages like [double hi lo( with summed single-precision  
parts hi and lo to represent double-precision numbers, i would suggest  
something like [date ymd hms( where ymd and hms are some numbers that  
get encoded and decoded by some objects.

greetings,
Thomas

Am 12.06.2006 um 18:47 schrieb Hans-Christoph Steiner:

>
> Since Pd only has 19bits of integer resolution, we can't use UNIX time  
> within Pd. So I was thinking that perhaps ISO format would would well  
> in Pd since its a symbol:
>
> For example:
>
> Today is 2006-06-12.  This email was sent written at 12:40:23.  All of  
> this can be lumped together as 20060612T124023.  I am not sure if this  
> ISO unified date/time format officially supports fractional seconds,  
> but since it does support fractional seconds in the time  
> (12:40:23.2342), and the digit positions are fixed, so I think we can  
> easily just tack on fractional seconds like this:  
> 20060612T124023.2342.  I think keeping the "." is preferable since ISO  
> 8601 says 12:40:23.2342 can be shorted to 124023.2342, but I didn't  
> see mention of 1240232342.
>
> One problem is that ISO 8601 allows you to omit the separators "-" and  
> ":", which would then make it a float in Pd, and therefore it would be  
> truncated to 6 digits.  So we couldn't support that.
>
> Here's a page all about ISO 8601 date/time formats:
>
> http://www.cl.cam.ac.uk/~mgk25/iso-time.html#time
>
> Thoughts? Comments? Flames? ;)
>
> .hc
>
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