git@vger.kernel.org mailing list mirror (one of many)
 help / color / mirror / code / Atom feed
From: Johannes Sixt <j6t@kdbg.org>
To: Taylor Blau <me@ttaylorr.com>
Cc: "Han-Wen Nienhuys" <hanwen@google.com>,
	"Ævar Arnfjörð Bjarmason" <avarab@gmail.com>,
	git@vger.kernel.org, "Junio C Hamano" <gitster@pobox.com>,
	"Johannes Schindelin" <johannes.schindelin@gmx.de>
Subject: Re: [PATCH 3/3] reftable tests: avoid "int" overflow, use "uint64_t"
Date: Tue, 11 Jan 2022 21:21:11 +0100	[thread overview]
Message-ID: <e8e2c37d-39f1-0ae4-7894-07e85628a757@kdbg.org> (raw)
In-Reply-To: <Yd3mCVLyxkVTNcS9@nand.local>

Am 11.01.22 um 21:18 schrieb Taylor Blau:
> On Tue, Jan 11, 2022 at 09:08:46PM +0100, Johannes Sixt wrote:
>> Am 11.01.22 um 20:41 schrieb Taylor Blau:
>>> On Tue, Jan 11, 2022 at 08:31:47PM +0100, Han-Wen Nienhuys wrote:
>>>> On Tue, Jan 11, 2022 at 8:28 PM Taylor Blau <me@ttaylorr.com> wrote:
>>>>> In any case, you're only setting the lower half of `min` high. Maybe:
>>>>>
>>>>>     uint64_t min = ~0ul;
>>>>
>>>> yeah, that works.
>>>
>>> I'm pretty sure this is OK on 32-bit systems, too, but confirmation from
>>> somebody more confident than I in this area would be welcome :).
>>
>> It does not work on Windows: unsigned long is 32 bits wide. You have to
>> make it
>>
>>    uint64_t min = ~(uint64_t)0;
> 
> Perfect; this is exactly what I was looking for. Thanks!

Actually, on second thought, UINT64_MAX would be even better.

-- Hannes

  reply	other threads:[~2022-01-11 20:21 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-11 16:40 [PATCH 0/3] Fix SunCC compiler complaints new in v2.35.0-rc0 Ævar Arnfjörð Bjarmason
2022-01-11 16:40 ` [PATCH 1/3] test-tool genzeros: initialize "zeros" to avoid SunCC warning Ævar Arnfjörð Bjarmason
2022-01-11 19:06   ` Taylor Blau
2022-01-12 14:21   ` Johannes Schindelin
2022-01-12 19:10     ` Taylor Blau
2022-01-13 10:08       ` Ævar Arnfjörð Bjarmason
2022-01-13 15:31         ` Johannes Schindelin
2022-01-13 17:38         ` Junio C Hamano
2022-01-11 16:40 ` [PATCH 2/3] reftable: remove unreachable "return" statements Ævar Arnfjörð Bjarmason
2022-01-11 19:16   ` Taylor Blau
2022-01-12 12:47     ` Ævar Arnfjörð Bjarmason
2022-01-12 19:19       ` Taylor Blau
2022-01-13 10:29         ` Ævar Arnfjörð Bjarmason
2022-01-13 15:39           ` Johannes Schindelin
2022-01-13 20:17       ` Johannes Sixt
2022-01-13 21:37         ` Junio C Hamano
2022-01-11 16:40 ` [PATCH 3/3] reftable tests: avoid "int" overflow, use "uint64_t" Ævar Arnfjörð Bjarmason
2022-01-11 19:28   ` Taylor Blau
2022-01-11 19:31     ` Han-Wen Nienhuys
2022-01-11 19:41       ` Taylor Blau
2022-01-11 20:08         ` Johannes Sixt
2022-01-11 20:18           ` Taylor Blau
2022-01-11 20:21             ` Johannes Sixt [this message]
2022-01-11 20:24               ` Taylor Blau
2022-01-12 14:18                 ` Johannes Schindelin
2022-01-12 19:02               ` Junio C Hamano
2022-01-12 19:07                 ` Taylor Blau
2022-01-13 10:04                   ` Ævar Arnfjörð Bjarmason
2022-01-13 21:38                     ` Junio C Hamano
2022-01-11 17:06 ` [PATCH 0/3] Fix SunCC compiler complaints new in v2.35.0-rc0 Han-Wen Nienhuys
2022-01-11 18:36   ` René Scharfe
2022-01-12  1:22 ` Emily Shaffer

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

  List information: http://vger.kernel.org/majordomo-info.html

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=e8e2c37d-39f1-0ae4-7894-07e85628a757@kdbg.org \
    --to=j6t@kdbg.org \
    --cc=avarab@gmail.com \
    --cc=git@vger.kernel.org \
    --cc=gitster@pobox.com \
    --cc=hanwen@google.com \
    --cc=johannes.schindelin@gmx.de \
    --cc=me@ttaylorr.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
Code repositories for project(s) associated with this public inbox

	https://80x24.org/mirrors/git.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).