--------
In message <[email protected]>, Nils Goroll
writes:
>> printf("%ju.%06ju",
>> (uint64_t)floor(foo),
>> (uint64_t)floor((foo*1e6)) % 1000000UL);
>
>nice trick. On Linux, this gets us down to the same order of magnitude as a
>%lu.%06lu with uint64_t
The important thing here is the FP rendering, not the FP math, which is
instantaneous for all practical purposes.
It's kind of surprising to me that "%.<N>f" hasn't gotten specific
optimization, it is a lot simpler thing than the general FP formatting
problem, but if there is any code I'm not keen on wading into, it is
FP formatting code...
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
[email protected] | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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