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Re: JULDAY 5.4 not same as 5.3? [message #24064 is a reply to message #23992]

Sun, 04 March 2001 12:14

Mark Hadfield
Messages: 783
Registered: May 1995

Senior Member

"Don Woodraska" <don.woodraska@lasp.colorado.edu> wrote in message
news:3A9FE8D9.8E9BE7DA@lasp.colorado.edu...
> I've pinpointed the problem.
>
> SUMMARY:
> ***
> The bug appears only with unsigned-long and unsigned-64-bit-long hour
argument
> to JULDAY.
>
> The bug appears on lines 178-179 of JULDAY.PRO. Here it is:
> ...

Well done, Dan. To correct my earlier post, this DOES also occur on windows.
In the list of data values in your original post, i.e...

>>> UMM LONG = 2
>>> UDD LONG = 16
>>> UYEAR LONG = 2001
>>> UHR ULONG = 0
>>> UMIN ULONG = 0
>>> USEC ULONG = 0

...I missed the fact that the hour minute & second values are ULONG and not
LONG. (Though I did wonder why you put a "U" prefix on the variable names!)

I wonder how many other routines can be broken if you pass unsigned-integer
values to them. And how paranoid does a person writing a routine have to be?

Final comment: Isn't JULDAY's argument order ghastly? Month, day, year,
hour, minute, second? I mean, really!

---
Mark Hadfield
m.hadfield@niwa.cri.nz http://katipo.niwa.cri.nz/~hadfield
National Institute for Water and Atmospheric Research

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[Message index]

		JULDAY 5.4 not same as 5.3? By: Don Woodraska on Thu, 01 March 2001 15:00
		Re: JULDAY 5.4 not same as 5.3? By: pit on Tue, 06 March 2001 09:23
		Re: JULDAY 5.4 not same as 5.3? By: Mark Hadfield on Mon, 05 March 2001 14:57
		Re: JULDAY 5.4 not same as 5.3? By: Craig Markwardt on Mon, 05 March 2001 14:22
		Re: unsigned int woes (was: JULDAY 5.4 not same as 5.3?) By: Martin Schultz on Mon, 19 March 2001 06:19
		Re: JULDAY 5.4 not same as 5.3? By: pit on Mon, 05 March 2001 10:03
		Re: JULDAY 5.4 not same as 5.3? By: Mark Hadfield on Sun, 04 March 2001 12:14

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