Hi Regina, I was on sick leave, hence the silence.
On Tuesday, 2008-07-01 14:16:08 +0200, Regina Henschel wrote:
> I'm searching for the functions log1p and expm1 in OOo. The function
> log1p(x) returns log(1+x) for x near 0, and expm1(x) returns exp(x)-1
> for x near 0.
C99 compliant compilers should provide them with their math libraries.
GCC and Sun Studio have it, your question sounds as if MSVC does not.
AFAIK Boost provides those functions as well, don't know if the template
works out of the box or would need some Boost library compiled and
linked.
> I've got an ersatz, but I'd be surprised if it was not implemented yet.
>
> If it is really not implemented, I need to know whether my ersatz will
> work on other compilers than MS Visual Express 9. Can anyone help with
> that?
It might be that no other supported platform than MSVC would need it..
#ifdef __MSC_VER
double log1p( double x ) { ... }
#endif
may be sufficient. However, I'd try the Boost implementation first, that
might save worries.
Eike
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