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Re: [PATCH 3/6] hash algorithms: use size_t for section lengths

From
Johannes Schindelin <johannes.schindelin@gmx.de>
Date
Jun 16, 2026, 14:48 UTC
Message-ID
<8acdcffb-e49f-12fe-ffd7-19f0799c91d4@gmx.de>
In-Reply-To
<ai-5VmawU2MRiAHQ@pks.im>
Hi Patrick,
On Tue, 16 Jun 2026, Patrick Steinhardt wrote:
Show 16 quoted lines
> On Thu, Jun 04, 2026 at 05:15:09PM +0000, Philip Oakley via GitGitGadget wrote:
> > diff --git a/object-file.c b/object-file.c
> > index 1f5f9daf24..c648cecd80 100644
> > --- a/object-file.c
> > +++ b/object-file.c
> > @@ -581,7 +581,7 @@ static void write_object_file_prepare(const struct git_hash_algo *algo,
> >  	/* Generate the header */
> >  	*hdrlen = format_object_header(hdr, *hdrlen, type, len);
> >  
> > -	/* Sha1.. */
> > +	/* Hash (function pointers) computation */
> >  	hash_object_body(algo, &c, buf, len, oid, hdr, hdrlen);
> >  }
> >  
> 
> Thanks for updating this comment while at it :)

It wasn't my idea, it was Claude Opus'. I would have left it as-is, but then decided that it's actually a good change and not worth splitting out into a separate commit.

Show 19 quoted lines
> > diff --git a/t/t1007-hash-object.sh b/t/t1007-hash-object.sh
> > index 7867fd1dbf..10382a815e 100755
> > --- a/t/t1007-hash-object.sh
> > +++ b/t/t1007-hash-object.sh
> > @@ -261,7 +261,7 @@ test_expect_success '--stdin outside of repository (uses default hash)' '
> >  	test_cmp expect actual
> >  '
> >  
> > -test_expect_failure EXPENSIVE,SIZE_T_IS_64BIT,!LONG_IS_64BIT \
> > +test_expect_success EXPENSIVE,SIZE_T_IS_64BIT,!LONG_IS_64BIT \
> >  		'files over 4GB hash literally' '
> >  	test-tool genzeros $((5*1024*1024*1024)) >big &&
> >  	test_oid large5GB >expect &&
> 
> Previously we required `!LONG_IS_64BIT`, because the test would have
> succeeded on platforms where it is 64 bit wide. But now that this test
> works on all platforms I rather wonder whether we should completely drop
> that prerequisite here, as we expect it to pass regardless of whether or
> not long is 64 bit now.
Good point!

Thank you for the review, Johannes

Previous: Patrick SteinhardtNext: Philip Oakley via GitGitGadget
Message 8 of 27 in “Support hashing objects larger than 4GB on Windows”
  1. 0/6 Support hashing objects larger than 4GB on WindowsJohannes Schindelin via GitGitGadget, Jun 4, 2026
  2. 1/6 hash-object: demonstrate a >4GB/LLP64 problemPhilip Oakley via GitGitGadget, Jun 4, 2026
  3. 2/6 object-file.c: use size_t for header lengthsPhilip Oakley via GitGitGadget, Jun 4, 2026
  4. Patrick SteinhardtJun 15, 2026
  5. Johannes SchindelinJun 16, 2026
  6. 3/6 hash algorithms: use size_t for section lengthsPhilip Oakley via GitGitGadget, Jun 4, 2026
  7. Patrick SteinhardtJun 15, 2026
  8. Johannes SchindelinJun 16, 2026
  9. 4/6 hash-object --stdin: verify that it works with >4GB/LLP64Philip Oakley via GitGitGadget, Jun 4, 2026
  10. Patrick SteinhardtJun 15, 2026
  11. 5/6 hash-object: add another >4GB/LLP64 test casePhilip Oakley via GitGitGadget, Jun 4, 2026
  12. Patrick SteinhardtJun 15, 2026
  13. Johannes SchindelinJun 16, 2026
  14. 6/6 hash-object: add a >4GB/LLP64 test case using filtered inputPhilip Oakley via GitGitGadget, Jun 4, 2026
  15. Philip OakleyJun 4, 2026
  16. Junio C HamanoJun 8, 2026
  17. 0/6 Support hashing objects larger than 4GB on WindowsJohannes Schindelin via GitGitGadget, Jun 16, 2026
  18. 1/6 hash-object: demonstrate a >4GB/LLP64 problemPhilip Oakley via GitGitGadget, Jun 16, 2026
  19. 2/6 object-file.c: use size_t for header lengthsPhilip Oakley via GitGitGadget, Jun 16, 2026
  20. 3/6 hash algorithms: use size_t for section lengthsPhilip Oakley via GitGitGadget, Jun 16, 2026
  21. 4/6 hash-object --stdin: verify that it works with >4GB/LLP64Philip Oakley via GitGitGadget, Jun 16, 2026
  22. 5/6 hash-object: add another >4GB/LLP64 test casePhilip Oakley via GitGitGadget, Jun 16, 2026
  23. 6/6 hash-object: add a >4GB/LLP64 test case using filtered inputPhilip Oakley via GitGitGadget, Jun 16, 2026
  24. Junio C HamanoJun 16, 2026
  25. How does GitGitGadget generate range-diffs, was Re: [PATCH v2 0/6] Support hashing objects larger than 4GB on WindowsJohannes Schindelin, Jun 17, 2026
  26. Junio C HamanoJun 17, 2026
  27. Patrick SteinhardtJun 18, 2026

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