Re: new module 'string-buffer'

[Bruce Korb]

Hi,

On 2/21/21 12:55 PM, Bruno Haible wrote:
> What alternative does gnulib offer to people who use open_memstream()?
> open_memstream is not portable:
>    https://www.gnu.org/software/gnulib/manual/html_node/open_005fmemstream.html
I mentioned this a couple of decades ago. There was no solution, so I 
rolled my own.
> But gnulib cannot provide a drop-in replacement since it would require
> unportable stream hackery (worse that stdio-impl.h).
>
> The alternative is a string buffer module. Gnulib has some modules that
> sound good at first sight but don't fulfil the need:

I wanted something that could act like a dropin replacement for 
fopen-ing a regular file. There are some quirks (if memory serves), but 
it is based on either fopencookie or funopen:


#ifdef HAVE_FOPENCOOKIE
        cookie_io_functions_t iof;
        iof.read  = pRd;
        iof.write = pWr;
        iof.seek  = fmem_seek;
        iof.close = fmem_close;

        res = fopencookie(pFMC, mode, iof);
#else
        res = funopen(pFMC, pRd, pWr, fmem_seek, fmem_close);
#endif

I would prefer to pull a new module and dump mine, but it needs seek and 
close functionality.

fmemopen.c
Description: Text Data