From: Jeff King <peff@peff.net>
To: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Cc: git@vger.kernel.org, Junio C Hamano <gitster@pobox.com>,
Johannes Schindelin <Johannes.Schindelin@gmx.de>,
Erik Faye-Lund <kusmabite@gmail.com>,
Jonathan Nieder <jrnieder@gmail.com>
Subject: Re: [RFC PATCH v2 2/5] linear-assignment.c: split up compute_assignment() function
Date: Tue, 14 Dec 2021 08:39:36 -0500 [thread overview]
Message-ID: <YbiemFN4F0ebr796@coredump.intra.peff.net> (raw)
In-Reply-To: <RFC-patch-v2-2.5-2233872545e-20211210T122901Z-avarab@gmail.com>
On Fri, Dec 10, 2021 at 01:30:39PM +0100, Ævar Arnfjörð Bjarmason wrote:
> Split up the the long compute_assignment() function to make it easier
> to reason about, particularly when it comes to what variables are used
> later, and which aren't.
OK, this refactor seems reasonable. I don't know enough about the
linear-assignment algorithm to know whether the names you've picked are
meaningful.
> +void compute_assignment(int column_count, int row_count,
> + int *cost,
> + int *column2row, int *row2column)
> +{
> + int *v;
> + int *free_row, free_count = 0, saved_free_count;
> +
> + assert(column_count > 1);
> + memset(column2row, -1, sizeof(int) * column_count);
> + memset(row2column, -1, sizeof(int) * row_count);
> + ALLOC_ARRAY(v, column_count);
So this is the code where we would have kept the column_count check and
zero'd column2row and row2column, had we not moved it in the previous
commit. I actually think it would fit fine here in the refactored
compute_assignment() if you had left it.
-Peff
next prev parent reply other threads:[~2021-12-14 13:40 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-09 19:19 [RFC PATCH 00/10] range-diff: fix segfault due to integer overflow Ævar Arnfjörð Bjarmason
2021-12-09 19:19 ` [RFC PATCH 01/10] string-list API: change "nr" and "alloc" to "size_t" Ævar Arnfjörð Bjarmason
2021-12-09 19:19 ` [RFC PATCH 02/10] range-diff.c: don't use st_mult() for signed "int" Ævar Arnfjörð Bjarmason
2021-12-10 3:39 ` Jeff King
2021-12-10 10:22 ` Ævar Arnfjörð Bjarmason
2021-12-10 11:41 ` Jeff King
2021-12-10 12:31 ` Ævar Arnfjörð Bjarmason
2021-12-10 19:24 ` Phillip Wood
2021-12-14 14:34 ` Jeff King
2021-12-10 14:27 ` Johannes Schindelin
2021-12-10 14:58 ` Ævar Arnfjörð Bjarmason
2021-12-11 14:01 ` Johannes Schindelin
2021-12-12 17:44 ` Ævar Arnfjörð Bjarmason
2021-12-14 14:42 ` Jeff King
2021-12-09 19:19 ` [RFC PATCH 03/10] range-diff.c: use "size_t" to refer to "struct string_list"'s "nr" Ævar Arnfjörð Bjarmason
2021-12-09 19:19 ` [RFC PATCH 04/10] range-diff: zero out elements in "cost" first Ævar Arnfjörð Bjarmason
2021-12-09 19:19 ` [RFC PATCH 05/10] linear-assignment.c: split up compute_assignment() function Ævar Arnfjörð Bjarmason
2021-12-09 19:19 ` [RFC PATCH 06/10] linear-assignment.c: take "size_t", not "int" for *_count Ævar Arnfjörð Bjarmason
2021-12-09 19:19 ` [RFC PATCH 07/10] linear-assignment.c: convert a macro to a "static inline" function Ævar Arnfjörð Bjarmason
2021-12-09 19:19 ` [RFC PATCH 08/10] linear-assignment.c: detect signed add/mul on GCC and Clang Ævar Arnfjörð Bjarmason
2021-12-10 3:56 ` Jeff King
2021-12-09 19:19 ` [RFC PATCH 09/10] linear-assignment.c: add and use intprops.h from Gnulib Ævar Arnfjörð Bjarmason
2021-12-09 19:19 ` [RFC PATCH 10/10] linear-assignment.c: use "intmax_t" instead of "int" Ævar Arnfjörð Bjarmason
2021-12-10 4:00 ` Jeff King
2021-12-10 12:30 ` [RFC PATCH v2 0/5] range-diff: fix segfault due to integer overflow Ævar Arnfjörð Bjarmason
2021-12-10 12:30 ` [RFC PATCH v2 1/5] range-diff: zero out elements in "cost" first Ævar Arnfjörð Bjarmason
2021-12-14 13:36 ` Jeff King
2021-12-10 12:30 ` [RFC PATCH v2 2/5] linear-assignment.c: split up compute_assignment() function Ævar Arnfjörð Bjarmason
2021-12-14 13:39 ` Jeff King [this message]
2021-12-10 12:30 ` [RFC PATCH v2 3/5] linear-assignment.c: take "size_t", not "int" for *_count Ævar Arnfjörð Bjarmason
2021-12-14 13:40 ` Jeff King
2021-12-10 12:30 ` [RFC PATCH v2 4/5] range-diff.c: rename "n" to "column_count" in get_correspondences() Ævar Arnfjörð Bjarmason
2021-12-14 13:42 ` Jeff King
2021-12-10 12:30 ` [RFC PATCH v2 5/5] range-diff: fix integer overflow & segfault on cost[i + n * j] Ævar Arnfjörð Bjarmason
2021-12-14 14:04 ` Jeff King
2021-12-10 14:31 ` [RFC PATCH 00/10] range-diff: fix segfault due to integer overflow Johannes Schindelin
2021-12-10 15:07 ` Ævar Arnfjörð Bjarmason
2021-12-21 23:22 ` Philip Oakley
2021-12-21 23:36 ` Ævar Arnfjörð Bjarmason
2021-12-22 20:50 ` Johannes Schindelin
2021-12-22 21:11 ` Jeff King
2021-12-24 11:15 ` Philip Oakley
2021-12-24 16:46 ` Ævar Arnfjörð Bjarmason
2021-12-24 18:31 ` Philip Oakley
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