[Bug-tar] Re: [PATCH] avoid compiler warning

[Eric Blake]

Eric Blake <ebb9 <at> byu.net> writes:

> 
> I noticed some use of undefined behavior of ctype macros (not all platforms 
> guarantee that isxxx(char) produces sane results, when the high bit is set).

> 
> * src/xheader.c (xheader_set_keyword_equal): Pass correct type to
> ctype macros.
> * src/transform.c (run_case_conv): Likewise.

Note that an alternative patch would be to rely on the gnulib c-ctype module, 
where it is safe to use c_isxxx(char), and where your results are faster 
because they don't depend on the current locale.

-- 
Eric Blake