[Bug libc/29913] iconv(3) is not POSIX compliant, and does not conform to linux man-pages manual

["rrt at sc3d dot org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=29913

--- Comment #9 from Reuben Thomas <rrt at sc3d dot org> ---
(In reply to Bruno Haible from comment #5)
> 
> If you need code that works with multiple iconv implementations, take a look
> at gnulib/lib/unicodeio.c lines 137..154 or gnulib/lib/striconveh.c lines
> 950..962. You see that the problem is that replacing unknown or
> inconvertible inputs with '?' or '*' or NUL is
> - just not yielding practically useful behaviour (especially because the
> caller then cannot transform a buffer all at once, a purpose for which the
> iconv function was initially designed),
> - requiring platform dependent recognition heuristics.

For those who need to work with multiple implementations, it looks like this
code could usefully be exposed in its own gnulib API.

Since most of the problems I've had with Recode since taking it over have
arisen from iconv, and coping with different implementations just makes it
worse, I think I will retreat to using GNU libiconv (which Recode used to use)
where at least I only have one implementation to deal with.

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