From patchwork Fri Feb 2 06:56:01 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiri Slaby X-Patchwork-Id: 769436 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 B849C47F52; Fri, 2 Feb 2024 06:56:34 +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=1706856994; cv=none; b=Odlp6DGbVnwIfHRhqrSosQ3fTBdMfNRgpJaEduzt0kUjN6vjIaTtcI8WwlPsxAfh/u6hLMOgdRQyl5ItBb6G4tOVbiZuqQ7vypFqHmEb2kYI45hTs41EW55vqbqUjbyOTgAdQIof6aHDlaxApFkicCsa0l9VrAkZmwRJTJbuWV0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706856994; c=relaxed/simple; bh=0GUh1LaUgkZ77YCZj6fr2MXPqpNXX+mysOC2Cm9UfMk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=IP+mJK3JHvVHno7Z10FNNGRBYPklhBPLjQURxs+X009VQszZF831s7GMtcQIPmcqg888oWlvqzgADEVEhuwYotwu02JzgabOMJN9sIJX4tq+H8kXFSwU9RM0A6spBgqKA6xOfdJpoqAPV2plcUO+f5NznI5KJMRlsq2VF0/G5qM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=C67wQcD3; 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="C67wQcD3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 82468C43390; Fri, 2 Feb 2024 06:56:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1706856994; bh=0GUh1LaUgkZ77YCZj6fr2MXPqpNXX+mysOC2Cm9UfMk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=C67wQcD3tTtHSj1IE0ZwxgJ3G+xAwGt3zmD19kECsceqpUtYDDPTYZDiHJ2hYTJSb 50bgErCPc9aKBxLPuzz4NFcEKjPTkcqdGUFi8lIoePVh65km7SE5hnPS0MLC/q943h 31VctLSPyF5rhEWPFoAu2oAhO1qC6TmD1ADeWDx95QW0epS186MudRCdT7O2h5Ao8q uqdlbfmnQ0vDxhd185jQPSyGbaEUeJ/uw62KekPiviNYTLWFOYMqgTP/S5Wjb+sT4Z 8Bb+9Fyv/CbPNWnDJCPQUEuZIxmBaIousgOWjTyVgMwnGeSSpiyAk4xCsTBJOeLkWU FW7ckznyZq4Sw== From: "Jiri Slaby (SUSE)" To: gregkh@linuxfoundation.org Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, "Jiri Slaby (SUSE)" Subject: [PATCH 15/22] tty: vt: name, reflow and document enum vc_ctl_state Date: Fri, 2 Feb 2024 07:56:01 +0100 Message-ID: <20240202065608.14019-16-jirislaby@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240202065608.14019-1-jirislaby@kernel.org> References: <20240202065608.14019-1-jirislaby@kernel.org> Precedence: bulk X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The enum for states is currently compact and undocumented. Put each definition on a separate line and document them all using kernel-doc. Document the same on the use sites. Signed-off-by: Jiri Slaby (SUSE) --- drivers/tty/vt/vt.c | 72 ++++++++++++++++++++++++++++++++++----------- 1 file changed, 55 insertions(+), 17 deletions(-) diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 1c832d04c0dc..6d08290fdfdf 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -2091,9 +2091,44 @@ static void restore_cur(struct vc_data *vc) vc->vc_need_wrap = 0; } -enum { ESnormal, ESesc, ESsquare, ESgetpars, ESfunckey, - EShash, ESsetG0, ESsetG1, ESpercent, EScsiignore, ESnonstd, - ESpalette, ESosc, ESapc, ESpm, ESdcs }; +/** + * enum vc_ctl_state - control characters state of a vt + * + * @ESnormal: initial state, no control characters parsed + * @ESesc: ESC parsed + * @ESsquare: CSI parsed -- modifiers/parameters/ctrl chars expected + * @ESgetpars: CSI parsed -- parameters/ctrl chars expected + * @ESfunckey: CSI [ parsed + * @EShash: ESC # parsed + * @ESsetG0: ESC ( parsed + * @ESsetG1: ESC ) parsed + * @ESpercent: ESC % parsed + * @EScsiignore: CSI [0x20-0x3f] parsed + * @ESnonstd: OSC parsed + * @ESpalette: OSC P parsed + * @ESosc: OSC [0-9] parsed + * @ESapc: ESC _ parsed + * @ESpm: ESC ^ parsed + * @ESdcs: ESC P parsed + */ +enum vc_ctl_state { + ESnormal, + ESesc, + ESsquare, + ESgetpars, + ESfunckey, + EShash, + ESsetG0, + ESsetG1, + ESpercent, + EScsiignore, + ESnonstd, + ESpalette, + ESosc, + ESapc, + ESpm, + ESdcs, +}; /* console_lock is held (except via vc_init()) */ static void reset_terminal(struct vc_data *vc, int do_clear) @@ -2527,10 +2562,10 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, u8 c) return; switch(vc->vc_state) { - case ESesc: + case ESesc: /* ESC */ handle_esc(tty, vc, c); return; - case ESnonstd: + case ESnonstd: /* ESC ] aka OSC */ if (c=='P') { /* palette escape sequence */ for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) vc->vc_par[vc->vc_npar] = 0; @@ -2545,7 +2580,7 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, u8 c) else vc->vc_state = ESnormal; return; - case ESpalette: + case ESpalette: /* ESC ] P aka OSC P */ if (isxdigit(c)) { vc->vc_par[vc->vc_npar++] = hex_to_bin(c); if (vc->vc_npar == 7) { @@ -2562,7 +2597,7 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, u8 c) } else vc->vc_state = ESnormal; return; - case ESsquare: + case ESsquare: /* ESC [ aka CSI, parameters or modifiers expected */ for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) vc->vc_par[vc->vc_npar] = 0; vc->vc_npar = 0; @@ -2587,7 +2622,7 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, u8 c) } vc->vc_priv = EPecma; fallthrough; - case ESgetpars: + case ESgetpars: /* ESC [ aka CSI, parameters expected */ if (c == ';' && vc->vc_npar < NPAR - 1) { vc->vc_npar++; return; @@ -2600,6 +2635,9 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, u8 c) vc->vc_state = EScsiignore; return; } + + /* parameters done, handle the control char @c */ + vc->vc_state = ESnormal; switch (vc->vc_priv) { @@ -2617,7 +2655,7 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, u8 c) return; vc->vc_state = ESnormal; return; - case ESpercent: + case ESpercent: /* ESC % */ vc->vc_state = ESnormal; switch (c) { case '@': /* defined in ISO 2022 */ @@ -2629,10 +2667,10 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, u8 c) return; } return; - case ESfunckey: + case ESfunckey: /* ESC [ [ aka CSI [ */ vc->vc_state = ESnormal; return; - case EShash: + case EShash: /* ESC # */ vc->vc_state = ESnormal; if (c == '8') { /* DEC screen alignment test. kludge :-) */ @@ -2644,21 +2682,21 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, u8 c) do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); } return; - case ESsetG0: + case ESsetG0: /* ESC ( */ vc_setGx(vc, 0, c); vc->vc_state = ESnormal; return; - case ESsetG1: + case ESsetG1: /* ESC ) */ vc_setGx(vc, 1, c); vc->vc_state = ESnormal; return; - case ESapc: + case ESapc: /* ESC _ */ return; - case ESosc: + case ESosc: /* ESC ] [0-9] aka OSC [0-9] */ return; - case ESpm: + case ESpm: /* ESC ^ */ return; - case ESdcs: + case ESdcs: /* ESC P */ return; default: vc->vc_state = ESnormal;