From: Stephane Chazelas <stephane.chazelas@gmail.com>
To: Roman Perepelitsa <roman.perepelitsa@gmail.com>,
Zsh hackers list <zsh-workers@zsh.org>
Subject: Re: zsh converts a floating-point number to string with too much precision
Date: Sat, 21 Dec 2019 18:11:41 +0000 [thread overview]
Message-ID: <20191221181141.wy4ndiq6qyznod22@chaz.gmail.com> (raw)
In-Reply-To: <20191221175618.oolvw72n26tir2wg@chaz.gmail.com>
2019-12-21 17:56:18 +0000, Stephane Chazelas:
> 2019-12-21 10:43:43 +0100, Roman Perepelitsa:
> [...]
> > There is no simple algorithm that achieves this. I recall reading long
> > papers a few years back that were describing various inventions in
> > this field. They were pretty scary.
>
> https://github.com/openjdk/jdk/blob/f4af0eadb6eaf9d9614431110ab7fc9c1588966d/src/java.base/share/classes/jdk/internal/math/FloatingDecimal.java#L424
> is not exactly trivial. I enjoyed reading the comments even if I
> have not clue what the the code is doing.
[...]
Microsoft's STL implementation (to_chars) looks about as hairy:
https://github.com/microsoft/STL/blob/264b0d4a167daa9e5499af6d783c9ff22f7af03f/stl/inc/charconv
--
Stephane
next prev parent reply other threads:[~2019-12-21 21:07 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-20 1:37 Vincent Lefevre
2019-12-20 3:38 ` Mikael Magnusson
2019-12-20 16:58 ` Stephane Chazelas
2019-12-20 17:12 ` Roman Perepelitsa
2019-12-21 0:50 ` Vincent Lefevre
2019-12-21 8:47 ` Stephane Chazelas
2019-12-21 9:43 ` Roman Perepelitsa
2019-12-21 17:56 ` Stephane Chazelas
2019-12-21 18:11 ` Stephane Chazelas [this message]
2019-12-21 18:20 ` Roman Perepelitsa
2019-12-21 21:28 ` Vincent Lefevre
2019-12-21 1:00 ` Vincent Lefevre
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