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List:       bash-bug
Subject:    Re: printf %d $'"\xff' returns random values in UTF-8 and 0 in C locale
From:       Chet Ramey <chet.ramey () case ! edu>
Date:       2017-09-17 22:05:55
Message-ID: f8ea1394-b2c8-316b-f64a-b007828045af () case ! edu
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On 9/17/17 6:01 AM, Stephane Chazelas wrote:
> $ locale charmap
> UTF-8
> $ bash -c '"$@"' sh printf '%d\n' $'"\xff' $'"\xff' $'"\xff'
> 32767
> 0
> 0
> 
> That's because we store the return value of mblen() (which may be
> -1) into a size_t (unsigned) variable.
> 
> See patch below which aligns the behaviour with that of other
> shells which use the byte value when the initial sequence of
> bytes can't be converted to a character.

Thanks for the report. I'll take a look.

Chet

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


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