94830fcacc
In 7cc8f97108 (pack-objects: implement bitmap writing, 2013-12-21), the
bitmapped_commit struct was introduced, including the 'commit_pos'
field, which has been unused ever since its introduction more than a
decade ago.
Instead, we have used the nearby `commit_positions` array leaving the
bitmapped_commit struct with an unused 4-byte field.
We could drop the `commit_pos` field as unused, and continue to store
the values in the auxiliary array. But we could also drop the array and
store the data for each bitmapped_commit struct inside of the structure
itself, which is what this patch does.
In any spot that we previously read `commit_positions[i]`, we can now
instead read `writer.selected[i].commit_pos`. There are a few spots that
need changing as a result:
- write_selected_commits_v1() is a simple transformation, since we're
just reading the field. As a result, the function no longer needs an
explicit argument to pass the commit_positions array.
- write_lookup_table() also no longer needs the explicit
commit_positions array passed in as an argument. But it still needs
to sort an array of indices into the writer.selected array to read
them in commit_pos order, so table_cmp() is adjusted accordingly.
- bitmap_writer_finish() no longer needs to allocate, populate, and
free the commit_positions table. Instead, we can just write the data
directly into each struct bitmapped_commit.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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