Re: [avr-chat] Printf with leading zeros?

[Rick Mann]

Done.

        https://savannah.nongnu.org/bugs/index.php?32322

On Feb 1, 2011, at 15:15:09, Weddington, Eric wrote:

> 
> Please open a bug report on the avr-libc project on Savannah, with a 
> reproducible test case.
> 
> Thanks,
> Eric
> 
>> -----Original Message-----
>> From: address@hidden [mailto:avr-
>> address@hidden On Behalf Of Rick Mann
>> Sent: Tuesday, February 01, 2011 3:43 PM
>> To: Andy Warner
>> Cc: address@hidden
>> Subject: Re: [avr-chat] Printf with leading zeros?
>> 
>> 
>> Thanks for that, but I'm still seeing issues. Note that in my last email,
>> I mentioned that the behavior I'm seeing is *with* the floating-point
>> version of the library.
>> 
>> Moreover, the docs you quoted say "but only the # additional option can be
>> specified," although I don't know what that means, exactly. It seems to
>> say that "#" can be used, but other flags cannot (including width
>> specifiers). However, later on the page, under "Notes," it says "For
>> default version the width field and the "pad to left" ( symbol minus )
>> option will work in this case," suggesting that the field width and pad-
>> to-left flags work (in the case of floating point conversions, which
>> render as question marks). This suggests that even in the default version
>> of the library, field width specification should work.
>> 
>> None of that explains why some *values* result in different behavior.
>> 
>> Note that I don't mind losing the "#" flag, but that specifying zero-
>> padding and field minimum width is required, and I don't get that with
>> even the floating point version of the library.
>> 
>> --
>> Rick
>> 
>> 
>> On Feb 1, 2011, at 10:53:04, Andy Warner wrote:
>> 
>>> On Tue, Feb 1, 2011 at 12:32 PM, Rick Mann <address@hidden>
>> wrote:
>>>> [...]
>>>> There is clearly something broken in the library.
>>> 
>>> Are you falling foul of the default stripped-down vfprintf()
>> implementation.
>>> From the vfprintf docs @
>>> http://www.nongnu.org/avr-libc/user-
>> manual/group__avr__stdio.html#gaa3b98c0d17b35642c0f3e4649092b9f1
>>> (scroll down a bit..)
>>> 
>>> ...
>>> Since the full implementation of all the mentioned features becomes
>>> fairly large, three different flavours of vfprintf() can be selected
>>> using linker options. The default vfprintf() implements all the
>>> mentioned functionality except floating point conversions. A minimized
>>> version of vfprintf() is available that only implements the very basic
>>> integer and string conversion facilities, but only the # additional
>>> option can be specified using conversion flags (these flags are parsed
>>> correctly from the format specification, but then simply ignored).
>>> This version can be requested using the following compiler options:
>>> 
>>>  -Wl,-u,vfprintf -lprintf_min
>>> 
>>> If the full functionality including the floating point conversions is
>>> required, the following options should be used:
>>> 
>>>  -Wl,-u,vfprintf -lprintf_flt -lm
>>> 
>>> ...
>>> 
>>> --
>>> Andy
>>> 
>>> _______________________________________________
>>> AVR-chat mailing list
>>> address@hidden
>>> http://lists.nongnu.org/mailman/listinfo/avr-chat
>> 
>> 
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