From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5076E107A2 for ; Thu, 10 Nov 2022 16:43:03 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1C2AAC433B5; Thu, 10 Nov 2022 16:43:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1668098583; bh=Pqv7nrnSw/i2nkLoHhZe36xor+0aWZ+RAfK3x5lb5qk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KQn3g9qgwmBkJ3Wnm9vxu2L3S8bIXyFNlEQYHy0tMIwN5QBj06PvJhG4rpm0GpuEB GLZQFqXmFCsWDvzpYXSnEZxwbmW+nz0dbZgfnHLjqmA+H2VYUxCELTkC/mq1yAEVIk sY/IcDdQAIBb/RKTHzX5Ii2HbHpIjSBRIARMOPRaC2bm0XUncJ7go5zYE+xD8YA/w8 K5haTcYQCzGir4ppjj/ehtE3OySb7CFv5p5m8QS+W8wpnIs78z1cQnh1grp3YiQqRG eKeTVeJx6ov9zDF/6cRSau+xC4Sbxxl5cO4ULDLG2dzc2WxQVmJCToVNpobyP4ds3v fpLwbnifHBhbA== From: Miguel Ojeda To: Miguel Ojeda , Wedson Almeida Filho , Alex Gaynor , Boqun Feng , Gary Guo , =?UTF-8?q?Bj=C3=B6rn=20Roy=20Baron?= Cc: rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, patches@lists.linux.dev Subject: [PATCH v1 15/28] rust: str: add `b_str!` macro Date: Thu, 10 Nov 2022 17:41:27 +0100 Message-Id: <20221110164152.26136-16-ojeda@kernel.org> In-Reply-To: <20221110164152.26136-1-ojeda@kernel.org> References: <20221110164152.26136-1-ojeda@kernel.org> Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Gary Guo Add the `b_str!` macro, which creates a new `BStr` from a string literal. It is usable in const contexts, for instance: const X: &BStr = b_str!("Example"); Signed-off-by: Gary Guo [Reworded, adapted for upstream and applied latest changes] Signed-off-by: Miguel Ojeda --- rust/kernel/str.rs | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/rust/kernel/str.rs b/rust/kernel/str.rs index 3aa1a0cb9bf8..95eb757c619d 100644 --- a/rust/kernel/str.rs +++ b/rust/kernel/str.rs @@ -9,6 +9,27 @@ use core::fmt; /// `BStr` is simply an alias to `[u8]`, but has a more evident semantical meaning. pub type BStr = [u8]; +/// Creates a new [`BStr`] from a string literal. +/// +/// `b_str!` converts the supplied string literal to byte string, so non-ASCII +/// characters can be included. +/// +/// # Examples +/// +/// ``` +/// # use kernel::b_str; +/// # use kernel::str::BStr; +/// const MY_BSTR: &BStr = b_str!("My awesome BStr!"); +/// ``` +#[macro_export] +macro_rules! b_str { + ($str:literal) => {{ + const S: &'static str = $str; + const C: &'static $crate::str::BStr = S.as_bytes(); + C + }}; +} + /// Allows formatting of [`fmt::Arguments`] into a raw buffer. /// /// It does not fail if callers write past the end of the buffer so that they can calculate the -- 2.38.1