From: Programmingkid <programmingkidx@gmail.com>
To: Eric Blake <eblake@redhat.com>
Cc: BALATON Zoltan <balaton@eik.bme.hu>,
QEMU Developers <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] Adding more function keys support
Date: Wed, 13 Dec 2017 21:23:35 -0500 [thread overview]
Message-ID: <D7DE9C77-75F6-4A26-AC06-C50B8BE1F7D0@gmail.com> (raw)
In-Reply-To: <9dae1cb6-0ed1-ca51-42c7-e8d0bddf10d3@redhat.com>
> On Dec 13, 2017, at 9:20 PM, Eric Blake <eblake@redhat.com> wrote:
>
> On 12/13/2017 01:18 PM, Programmingkid wrote:
>
>> Thank you BALATON for the file. One thing that caught my eye in this file is this:
>>
>
>> if (usage->code == KEY_FN) {
>> asc->fn_on = !!value;
>>
>> Why would they need the double !?
>
> Double '!!' is an idiomatic way to force a value to be converted to bool
> (squashing all non-zero values into 1).
>
> --
> Eric Blake, Principal Software Engineer
> Red Hat, Inc. +1-919-301-3266
> Virtualization: qemu.org | libvirt.org
>
Thank you for the information.
next prev parent reply other threads:[~2017-12-14 2:23 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-10 7:10 [Qemu-devel] Adding more function keys support Programmingkid
2017-12-12 14:34 ` Daniel P. Berrange
2017-12-12 17:49 ` Programmingkid
2017-12-13 9:14 ` Daniel P. Berrange
2017-12-13 16:03 ` Programmingkid
2017-12-13 18:22 ` BALATON Zoltan
2017-12-13 19:18 ` Programmingkid
2017-12-14 2:20 ` Eric Blake
2017-12-14 2:23 ` Programmingkid [this message]
2017-12-14 10:27 ` Daniel P. Berrange
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