bug-bash
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: built-in printf %f parameter format depend on LC_NUMERIC


From: Chet Ramey
Subject: Re: built-in printf %f parameter format depend on LC_NUMERIC
Date: Fri, 12 Jul 2019 15:25:32 -0400
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:60.0) Gecko/20100101 Thunderbird/60.8.0

On 7/12/19 3:22 PM, Eli Schwartz wrote:
> On 7/12/19 3:16 PM, Chet Ramey wrote:
>> On 7/12/19 12:46 PM, Léa Gris wrote:
>>> Le 09/07/2019 à 22:02, Chet Ramey écrivait :
>>>
>>>> These are up to the system's strtol/strtod. I don't know of too many
>>>> strtol implementations that use the thousands separator and numeric
>>>> grouping.
>>>
>>> Chet and you other Bash maintainers or contributors dudes:
>>>
>>> I can foresee the implications and blockages even lightly considering the
>>> possibility to align the Bash's built-in printf behavior with the %f
>>> argument with the sibling GNU Coreutils printf implementation.
>>
>> I don't think I explained this very well. For input, the printf builtin
>> relies on strtod(3) to parse the string into a floating point number. For
>> output, it relies on printf(3) to display a floating point number as a
>> string. I'm not really interested in re-implementing either one if the
>> system libc provides one that's perfectly acceptable. On POSIX-conformant
>> systems, those library functions generally honor the locale's decimal_point
>> character as the radix character.
>>
>> The `bc' you're using isn't POSIX conformant.
>>
> 
> https://pubs.opengroup.org/onlinepubs/9699919799/utilities/bc.html#tag_20_09_16
> 
> "The bc utility always uses the <period> ( '.' ) character to represent
> a radix point, regardless of any decimal-point character specified as
> part of the current locale. 

Good catch. I went by the bc man page that Dennis Williamson posted.

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    address@hidden    http://tiswww.cwru.edu/~chet/

Attachment: signature.asc
Description: OpenPGP digital signature


reply via email to

[Prev in Thread] Current Thread [Next in Thread]