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Re: locale-related printf bug when using formats with thousands grouping
From: |
Eric Blake |
Subject: |
Re: locale-related printf bug when using formats with thousands grouping character |
Date: |
Wed, 12 Jan 2011 06:52:52 -0700 |
User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.13) Gecko/20101209 Fedora/3.1.7-0.35.b3pre.fc14 Lightning/1.0b3pre Mnenhy/0.8.3 Thunderbird/3.1.7 |
[adding bug-gnulib]
On 01/11/2011 08:40 PM, Andrew J. Schorr wrote:
> On Tue, Jan 11, 2011 at 10:31:26PM -0500, Andrew J. Schorr wrote:
>> Using gawk 3.1.8 on Fedora 13 64-bit linux, I see this:
>>
>> bash-4.1$ (echo 1000000; echo 999999.9998071828) | gawk -v "sq='" '{printf
>> "%" sq ".2f\n", $1}'
>> 1,000,000.00
>> ,000,000.00
>
> Actually, this may be a glibc bug:
>
> bash-4.1$ printf "%'.2f\n" 999999.9998071828
> ,000,000.00
>
> bash-4.1$ printf "%'.2f\n" 1000000
> 1,000,000.00
> bash-4.1$ rpm -q glibc
> glibc-2.12.1-4.x86_64
I concur, as running the same tests on both Solaris 10 and on Cygwin
1.7.7 under LC_ALL=en_US produced correct results.
It appears that glibc fails to account for the fact that rounding may
increase the number of result characters by 2 instead of 1 when %' is in
effect (going from 999 to 1,000, at any power of 10*3).
Please file a glibc bug, and in the meantime, gnulib should consider
modifying the printf-posix family of modules to work around this
rounding bug.
--
Eric Blake address@hidden +1-801-349-2682
Libvirt virtualization library http://libvirt.org
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- locale-related printf bug when using formats with thousands grouping character, Andrew J. Schorr, 2011/01/11
- Re: locale-related printf bug when using formats with thousands grouping character, Andrew J. Schorr, 2011/01/11
- Re: locale-related printf bug when using formats with thousands grouping character,
Eric Blake <=
- Re: locale-related printf bug when using formats with thousands grouping character, Jim Meyering, 2011/01/12
- Re: locale-related printf bug when using formats with thousands grouping character, Andrew J. Schorr, 2011/01/12
- Re: locale-related printf bug when using formats with thousands grouping character, Bruno Haible, 2011/01/12
- Re: locale-related printf bug when using formats with thousands grouping character, Jim Meyering, 2011/01/13
- Re: locale-related printf bug when using formats with thousands grouping character, Jim Meyering, 2011/01/13