🚀 go-pugleaf

msb@sq.com (Mark Brader) writes:

>However, the "ANSI C" standard, written in the US but adopted inter-
>nationally as ISO 9899, is.  The library function strftime() supports
>two kinds of week numbers (presumably intended for the "few people"
>I mentioned above), but neither numbering is ISO 8601 style.

I think this really has to be extended in the next ISO 9899 (ISO C)
revision! POSIX.2 has already added a few formatting codes for the
"date" program command, including %V for the ISO 8601 week number
(01-53) and %u for the day of the week (Monday = 1, Sunday = 7).

From a text which I wrote recently:

"Unfortunately, the current version of the C programming language
standard provides in the strftime() function no means to generate the
ISO 8601 week notation. A required extension would be four new
formatting codes: for the year of the week to which the specified day
belongs (both 2-digit and 4-digit), for the number of the week between
01 and 53 (%V), and for the day of the week between 1 (Monday) and 7
(Sunday) (%u). Another trivial mistake in the description of
strftime() in the C standard is that the range of seconds goes from 00
to 61, because at one time only one single leap second 60 can be
inserted into UTC and consequently there will never be a leap second
61."

(Full text is on <http://www.ft.uni-erlangen.de/~mskuhn/iso-time.html>)

Is such an extension of ISO C alread planned or shall I send a request
about this tiny problem to DIN myself?

Markus

-- 
Markus Kuhn, Computer Science student -- University of Erlangen,
Internet Mail: <mskuhn@cip.informatik.uni-erlangen.de> - Germany
WWW Home: <http://wwwcip.informatik.uni-erlangen.de/user/mskuhn>