RFC: mblen() return code when n is zero

[Rajalakshmi Srinivasaraghavan]

On 11/17/2014 09:53 PM, Paul Eggert wrote:
> Rajalakshmi Srinivasaraghavan wrote:
>> To get clarified on previous comments,What should mblen (mblen() calls
>> __mbrtowc() internally)  return for the above testcase?
>
> There was no "above testcase" in your email, but I suppose mblen and 
> mbtowc should return -1 when given empty inputs, as in this case the 
> leading bytes of the input buffer do not form a valid multibyte 
> character.  Although POSIX doesn't say what errno value to use, EILSEQ 
> doesn't seem appropriate here.  What errno values do other C libraries 
> use?  I'd be guided by that.
>
For testcase please refer:
https://sourceware.org/ml/libc-alpha/2014-11/msg00191.html

-- 
Thanks
Rajalakshmi S