| From: | Bruce Momjian <maillist(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | jwieck(at)debis(dot)com |
| Cc: | hackers(at)postgreSQL(dot)org |
| Subject: | Re: [HACKERS] NAN code |
| Date: | 1999-01-04 15:59:53 |
| Message-ID: | 199901041559.KAA11505@candle.pha.pa.us |
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| Lists: | pgsql-hackers |
> num is of type Numeric, which is a pointer to struct
> NumericData! So the above should result in some compiler
> warning (in fact it type casts a pointer into a double value
> - and that will give unpredictable results).
>
> Seems that only isnan() is defined as part of Posix. But not
> a definition that can force a NAN. So we have to find a
> portable way to define the value NaN for double and float.
> Does anybody know of such a way?
See my later postings. 0.0/0.0 seems to do it.
--
Bruce Momjian | http://www.op.net/~candle
maillist(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026
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