[PATCH] gunzip: Implement chunked decompression

[Simon Glass]

Hi Marek,

On Wed, 4 Feb 2026 at 13:30, Marek Vasut <marek.vasut at mailbox.org> wrote:
>
> On 2/4/26 1:22 AM, Simon Glass wrote:
>
> Hello Simon,
>
> >> +       /* Test various sizes of decompression chunk sizes */
> >> +       for (j = 0; j < ARRAY_SIZE(sizes); j++) {
> >> +               env_set_ulong("gzwrite_chunk", sizes[j]);
> >> +               for (i = 0; i < ARRAY_SIZE(sizes); i++) {
> >> +                       ret = do_test_cmd_zip_unzip(uts, sizes[i], true);
> >> +                       if (ret)
> >> +                               return ret;
> >> +               }
> >> +       }
> >> +
> >>          return 0;
> >>   }
> >>   DM_TEST(dm_test_cmd_zip_gzwrite, UTF_CONSOLE);
> >> --
> >> 2.51.0
> >>
> >
> > Rather than an environment variable, you could create a variant of
> > gzwrite() which allows it to be passed.
> This test is invoking the command line 'gzwrite' command, it is not
> calling the gzwrite() function . And I don't think the chunk size should
> be configurable on command line by users ?

Agreed.

But the command test could just use the default, then add a C test to
call the unzip function directly with a series of sizes. Going through
the command is a bit of a pain. We have quite a few examples where the
command tests are more basic than the 'lower-level' tests.

Regards,
Simon