[php-maint] Bug#613982: Bug#613982: printf generates scientific notation inaccurately
geissert at debian.org
Fri Feb 18 20:32:41 UTC 2011
severity 613982 minor
On Friday 18 February 2011 11:03:08 Ronan wrote:
> printf, when outputting a number in scientific
> notation, allows the precision to be specified.
> However, the precision is capped at 40. If a cap
> has to be set at all, then it should be set at 52,
> because this is the smallest value which allows all
> IEEE double-precision floating-point numbers to be
> output with perfect accuracy.
I don't know why a limit was set in place in the *printf functions, but
according to the code that does the actual conversion it can handle a
precision up to 318.
You can workaround it by using number_format btw (which internally uses the
same formatter as *printf, without the arbitrary limit).
P.S. would be great if you could report it upstream. It would save us some
Raphael Geissert - Debian Developer
www.debian.org - get.debian.net
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