Johannes Schindelin 8f7356e90d delta: widen create_delta() and diff_delta() to size_t ...

Last stop in the delta-encoding API widening for >4 GiB blobs on
Windows: with create_delta_index() done in the prior commit and
create_delta()/diff_delta() finished here, every byte count that
crosses delta.h is now size_t. The struct fields they store into
have been size_t since the diff-delta struct widening.

The API change must move with all callers in the same commit (the
build only passes when every &delta_size matches the new size_t*).
Caller updates are kept minimal:

  * builtin/pack-objects.c get_delta() and try_delta(): widen only
    the local delta_size variable; the surrounding unsigned-long
    locals and their cast_size_t_to_ulong() shims are out of scope
    here and will be cleaned up in their own commits.

  * builtin/fast-import.c, diff.c, t/helper/test-pack-deltas.c:
    keep the local unsigned-long delta size (each feeds a still-
    unsigned-long downstream consumer: zlib's avail_in,
    deflate_it(), the test helper's own do_compress()), and bridge
    via a temporary size_t plus cast_size_t_to_ulong(). The new
    casts are paid back in later topics that widen those consumers.

  * t/helper/test-delta.c: widen the local outright (no downstream
    consumer beyond the test's own out_size, which is already
    size_t).

Assisted-by: Opus 4.7
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

2026-06-23 20:16:17 +02:00

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