From patchwork Thu Jan 18 07:57:27 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Jiri Slaby \(SUSE\)" X-Patchwork-Id: 765108 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 36C5A28DDB; Thu, 18 Jan 2024 07:58:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705564712; cv=none; b=f3y4KByAecWQpdc4aHqjiEuYyOd3MnoS/ne16/370Tb6udwbesDVfGK1paS1vUiL1yL0lcCwXG6+IB5b63mAf6/0gxvuPF/KH220vHigLCn0BUvKF6+VK8jT9u/xRpd6QSLSGohOJEMY4qQGGbu+JlRzDGHrh0RZpwrk9NI8jOQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705564712; c=relaxed/simple; bh=jneHPzOwrZgSk7jv5sxyALGkZSuZbXyrgWxzBqQrqFs=; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID: X-Mailer:In-Reply-To:References:MIME-Version: Content-Transfer-Encoding; b=VLT8dA5NXuxRdWYy9iQhRsOfd/CFA6mu1Y2SWSw/reo18Tolm9MoSQgHbrAIKR0eGSvi1pbNcJo+p8s5voMMTWMYPksK6kZu7Dh8HvDsMa7sc86as1wCj2eD8ynttPjZpVf8YdD/6gEUpLFlxQMi9fQdrMZCMXZbmK5NgQtJvE8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=dZmt5D9d; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="dZmt5D9d" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D36EEC433B2; Thu, 18 Jan 2024 07:58:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1705564712; bh=jneHPzOwrZgSk7jv5sxyALGkZSuZbXyrgWxzBqQrqFs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dZmt5D9dYiMPCcxEvRJlvZyH7BZTZiz2MoMTQyYP/zx2lWrHO4PiGrXjBvjg9lsTG Zz+QrXWeSJ2mNDZBF/OFwjiFPTCTEJohwzKA6yTywBjt5piVWYgx0XI5U628E4iUU6 ZniAl8ewU2H0kON+ozczmPw65HfC/t2XlYlzWzcnsmL3F7To2eSX+etCtTSU4c9iyZ UsMS1rHHrywT2plq9hwYt17Gh4Rk23O2Tk9b7PVg0p0Q+QUtymlJgZJls7nKUJ/Noc A1mVilOiNvnF3cyqGfrrTbfKSSrCGxvqrhdBj1v1+8Bj1Be+gLDdREDw3Ief5C3I/b vqzU3pPVb53Aw== From: "Jiri Slaby (SUSE)" To: gregkh@linuxfoundation.org Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, "Jiri Slaby (SUSE)" Subject: [PATCH 16/45] tty: vt: define an enum for ascii characters Date: Thu, 18 Jan 2024 08:57:27 +0100 Message-ID: <20240118075756.10541-17-jirislaby@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240118075756.10541-1-jirislaby@kernel.org> References: <20240118075756.10541-1-jirislaby@kernel.org> Precedence: bulk X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 I didn't find definitions for ascii in the kernel yet, so define it for non-printable characters used here. Note we use ' ' instead of 32 on one line too. Signed-off-by: Jiri Slaby (SUSE) --- drivers/tty/vt/vt.c | 62 ++++++++++++++++++++++++++++++++------------- 1 file changed, 44 insertions(+), 18 deletions(-) diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 4b514187ef15..7006889c920d 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -2157,6 +2157,28 @@ static bool ansi_control_string(unsigned int state) return false; } +enum { + ASCII_NULL = 0, + ASCII_BELL = 7, + ASCII_BACKSPACE = 8, + ASCII_IGNORE_FIRST = ASCII_BACKSPACE, + ASCII_HTAB = 9, + ASCII_LINEFEED = 10, + ASCII_VTAB = 11, + ASCII_FORMFEED = 12, + ASCII_CAR_RET = 13, + ASCII_IGNORE_LAST = ASCII_CAR_RET, + ASCII_SHIFTOUT = 14, + ASCII_SHIFTIN = 15, + ASCII_CANCEL = 24, + ASCII_SUBSTITUTE = 26, + ASCII_ESCAPE = 27, + ASCII_CSI_IGNORE_FIRST = ' ', /* 0x2x, 0x3a and 0x3c - 0x3f */ + ASCII_CSI_IGNORE_LAST = '?', + ASCII_DEL = 127, + ASCII_EXT_CSI = 128 + ASCII_ESCAPE, +}; + /* console_lock is held */ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) { @@ -2164,21 +2186,22 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) * Control characters can be used in the _middle_ * of an escape sequence, aside from ANSI control strings. */ - if (ansi_control_string(vc->vc_state) && c >= 8 && c <= 13) + if (ansi_control_string(vc->vc_state) && c >= ASCII_IGNORE_FIRST && + c <= ASCII_IGNORE_LAST) return; switch (c) { - case 0: + case ASCII_NULL: return; - case 7: + case ASCII_BELL: if (ansi_control_string(vc->vc_state)) vc->vc_state = ESnormal; else if (vc->vc_bell_duration) kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration); return; - case 8: + case ASCII_BACKSPACE: bs(vc); return; - case 9: + case ASCII_HTAB: vc->vc_pos -= (vc->state.x << 1); vc->state.x = find_next_bit(vc->vc_tab_stop, @@ -2190,34 +2213,37 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) vc->vc_pos += (vc->state.x << 1); notify_write(vc, '\t'); return; - case 10: case 11: case 12: + case ASCII_LINEFEED: + case ASCII_VTAB: + case ASCII_FORMFEED: lf(vc); if (!is_kbd(vc, lnm)) return; fallthrough; - case 13: + case ASCII_CAR_RET: cr(vc); return; - case 14: + case ASCII_SHIFTOUT: vc->state.charset = 1; vc->vc_translate = set_translate(vc->state.Gx_charset[1], vc); vc->vc_disp_ctrl = 1; return; - case 15: + case ASCII_SHIFTIN: vc->state.charset = 0; vc->vc_translate = set_translate(vc->state.Gx_charset[0], vc); vc->vc_disp_ctrl = 0; return; - case 24: case 26: + case ASCII_CANCEL: + case ASCII_SUBSTITUTE: vc->vc_state = ESnormal; return; - case 27: + case ASCII_ESCAPE: vc->vc_state = ESesc; return; - case 127: + case ASCII_DEL: del(vc); return; - case 128+27: + case ASCII_EXT_CSI: vc->vc_state = ESsquare; return; } @@ -2352,7 +2378,7 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) vc->vc_par[vc->vc_npar] += c - '0'; return; } - if (c >= 0x20 && c <= 0x3f) { /* 0x2x, 0x3a and 0x3c - 0x3f */ + if (c >= ASCII_CSI_IGNORE_FIRST && c <= ASCII_CSI_IGNORE_LAST) { vc->vc_state = EScsiignore; return; } @@ -2514,7 +2540,7 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) } return; case EScsiignore: - if (c >= 0x20 && c <= 0x3f) + if (c >= ASCII_CSI_IGNORE_FIRST && c <= ASCII_CSI_IGNORE_LAST) return; vc->vc_state = ESnormal; return; @@ -2775,17 +2801,17 @@ static bool vc_is_control(struct vc_data *vc, int tc, int c) * useless without them; to display an arbitrary font position use the * direct-to-font zone in UTF-8 mode. */ - if (c < 32) { + if (c < ' ') { if (vc->vc_disp_ctrl) return CTRL_ALWAYS & BIT(c); else return vc->vc_utf || (CTRL_ACTION & BIT(c)); } - if (c == 127 && !vc->vc_disp_ctrl) + if (c == ASCII_DEL && !vc->vc_disp_ctrl) return true; - if (c == 128 + 27) + if (c == ASCII_EXT_CSI) return true; return false;