[erlang-questions] zlib deflate problem

Colm Dougan <>
Tue May 20 19:43:43 CEST 2008


On Tue, May 20, 2008 at 3:15 AM, Matthew Dempsky <> wrote:
> On Mon, May 19, 2008 at 10:55 AM, Colm <> wrote:
>> Am I doing something dumb here or is this a bug in the erlang zlib
>> interface?  I strongly suspect it is the former.
>
> Your code looks fine to me.  Can you try applying the patch below to
> erts/emulator/drivers/common/zlib_drv.c and checks for any
> regressions?  (Z_BUF_ERROR is a non-fatal error case for inflate(3);
> it just indicates that zlib wasn't able to make any progress with the
> data given.)
>
> --- zlib_drv.c.orig     2008-05-19 19:09:00.000000000 -0700
> +++ zlib_drv.c  2008-05-19 19:09:12.000000000 -0700
> @@ -257,6 +257,10 @@
>                driver_deq(d->port, len);
>                return res;
>            }
> +           if (res == Z_BUF_ERROR) {
> +               res = Z_OK;
> +           }
>            if (res < 0) {
>                return res;
>            }


Matthew - I tried your patch and it worked.   I don't see any
regression but I haven't done extensive testing. If you think this is
the appropriate fix (rather than an exploratory patch) then I can
install the patched erlang on my running system and do more testing.

Thanks,
Colm



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