/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 1991, 1993, 1994
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "lp.cdefs.h"		/* A cross-platform version of <sys/cdefs.h> */
#include <stddef.h>
#include <string.h>
#include <termios.h>
#include "lp.local.h"
#include "extern.h"

struct modes {
	const char *name;
	const long  set;
	const long  unset;
};

/*
 * The code in optlist() depends on minus options following regular
 * options, i.e. "foo" must immediately precede "-foo".
 */
struct modes cmodes[] = {
	{ "cs5",	CS5, CSIZE },
	{ "cs6",	CS6, CSIZE },
	{ "cs7",	CS7, CSIZE },
	{ "cs8",	CS8, CSIZE },
	{ "cstopb",	CSTOPB, 0 },
	{ "-cstopb",	0, CSTOPB },
	{ "cread",	CREAD, 0 },
	{ "-cread",	0, CREAD },
	{ "parenb",	PARENB, 0 },
	{ "-parenb",	0, PARENB },
	{ "parodd",	PARODD, 0 },
	{ "-parodd",	0, PARODD },
	{ "parity",	PARENB | CS7, PARODD | CSIZE },
	{ "-parity",	CS8, PARODD | PARENB | CSIZE },
	{ "evenp",	PARENB | CS7, PARODD | CSIZE },
	{ "-evenp",	CS8, PARODD | PARENB | CSIZE },
	{ "oddp",	PARENB | CS7 | PARODD, CSIZE },
	{ "-oddp",	CS8, PARODD | PARENB | CSIZE },
	{ "pass8",	CS8, PARODD | PARENB | CSIZE },
	{ "-pass8",	PARENB | CS7, PARODD | CSIZE },
	{ "hupcl",	HUPCL, 0 },
	{ "-hupcl",	0, HUPCL },
	{ "hup",	HUPCL, 0 },
	{ "-hup",	0, HUPCL },
	{ "clocal",	CLOCAL, 0 },
	{ "-clocal",	0, CLOCAL },
	{ "crtscts",	CRTSCTS, 0 },
	{ "-crtscts",	0, CRTSCTS },
	{ "ctsflow",	CCTS_OFLOW, 0 },
	{ "-ctsflow",	0, CCTS_OFLOW },
	{ "dsrflow",	CDSR_OFLOW, 0 },
	{ "-dsrflow",	0, CDSR_OFLOW },
	{ "dtrflow",	CDTR_IFLOW, 0 },
	{ "-dtrflow",	0, CDTR_IFLOW },
	{ "rtsflow",	CRTS_IFLOW, 0 },
	{ "-rtsflow",	0, CRTS_IFLOW },
	{ "mdmbuf",	MDMBUF, 0 },
	{ "-mdmbuf",	0, MDMBUF },
	{ NULL, 0, 0},
};

struct modes imodes[] = {
	{ "ignbrk",	IGNBRK, 0 },
	{ "-ignbrk",	0, IGNBRK },
	{ "brkint",	BRKINT, 0 },
	{ "-brkint",	0, BRKINT },
	{ "ignpar",	IGNPAR, 0 },
	{ "-ignpar",	0, IGNPAR },
	{ "parmrk",	PARMRK, 0 },
	{ "-parmrk",	0, PARMRK },
	{ "inpck",	INPCK, 0 },
	{ "-inpck",	0, INPCK },
	{ "istrip",	ISTRIP, 0 },
	{ "-istrip",	0, ISTRIP },
	{ "inlcr",	INLCR, 0 },
	{ "-inlcr",	0, INLCR },
	{ "igncr",	IGNCR, 0 },
	{ "-igncr",	0, IGNCR },
	{ "icrnl",	ICRNL, 0 },
	{ "-icrnl",	0, ICRNL },
	{ "ixon",	IXON, 0 },
	{ "-ixon",	0, IXON },
	{ "flow",	IXON, 0 },
	{ "-flow",	0, IXON },
	{ "ixoff",	IXOFF, 0 },
	{ "-ixoff",	0, IXOFF },
	{ "tandem",	IXOFF, 0 },
	{ "-tandem",	0, IXOFF },
	{ "ixany",	IXANY, 0 },
	{ "-ixany",	0, IXANY },
	{ "decctlq",	0, IXANY },
	{ "-decctlq",	IXANY, 0 },
	{ "imaxbel",	IMAXBEL, 0 },
	{ "-imaxbel",	0, IMAXBEL },
	{ NULL, 0, 0},
};

struct modes lmodes[] = {
	{ "echo",	ECHO, 0 },
	{ "-echo",	0, ECHO },
	{ "echoe",	ECHOE, 0 },
	{ "-echoe",	0, ECHOE },
	{ "crterase",	ECHOE, 0 },
	{ "-crterase",	0, ECHOE },
	{ "crtbs",	ECHOE, 0 },	/* crtbs not supported, close enough */
	{ "-crtbs",	0, ECHOE },
	{ "echok",	ECHOK, 0 },
	{ "-echok",	0, ECHOK },
	{ "echoke",	ECHOKE, 0 },
	{ "-echoke",	0, ECHOKE },
	{ "crtkill",	ECHOKE, 0 },
	{ "-crtkill",	0, ECHOKE },
	{ "altwerase",	ALTWERASE, 0 },
	{ "-altwerase",	0, ALTWERASE },
	{ "iexten",	IEXTEN, 0 },
	{ "-iexten",	0, IEXTEN },
	{ "echonl",	ECHONL, 0 },
	{ "-echonl",	0, ECHONL },
	{ "echoctl",	ECHOCTL, 0 },
	{ "-echoctl",	0, ECHOCTL },
	{ "ctlecho",	ECHOCTL, 0 },
	{ "-ctlecho",	0, ECHOCTL },
	{ "echoprt",	ECHOPRT, 0 },
	{ "-echoprt",	0, ECHOPRT },
	{ "prterase",	ECHOPRT, 0 },
	{ "-prterase",	0, ECHOPRT },
	{ "isig",	ISIG, 0 },
	{ "-isig",	0, ISIG },
	{ "icanon",	ICANON, 0 },
	{ "-icanon",	0, ICANON },
	{ "noflsh",	NOFLSH, 0 },
	{ "-noflsh",	0, NOFLSH },
	{ "tostop",	TOSTOP, 0 },
	{ "-tostop",	0, TOSTOP },
	{ "flusho",	FLUSHO, 0 },
	{ "-flusho",	0, FLUSHO },
	{ "pendin",	PENDIN, 0 },
	{ "-pendin",	0, PENDIN },
	{ "crt",	ECHOE|ECHOKE|ECHOCTL, ECHOK|ECHOPRT },
	{ "-crt",	ECHOK, ECHOE|ECHOKE|ECHOCTL },
	{ "newcrt",	ECHOE|ECHOKE|ECHOCTL, ECHOK|ECHOPRT },
	{ "-newcrt",	ECHOK, ECHOE|ECHOKE|ECHOCTL },
	{ "nokerninfo",	NOKERNINFO, 0 },
	{ "-nokerninfo",0, NOKERNINFO },
	{ "kerninfo",	0, NOKERNINFO },
	{ "-kerninfo",	NOKERNINFO, 0 },
	{ NULL, 0, 0},
};

struct modes omodes[] = {
	{ "opost",	OPOST, 0 },
	{ "-opost",	0, OPOST },
	{ "litout",	0, OPOST },
	{ "-litout",	OPOST, 0 },
	{ "onlcr",	ONLCR, 0 },
	{ "-onlcr",	0, ONLCR },
	{ "tabs",	0, OXTABS },		/* "preserve" tabs */
	{ "-tabs",	OXTABS, 0 },
	{ "oxtabs",	OXTABS, 0 },
	{ "-oxtabs",	0, OXTABS },
	{ NULL, 0, 0},
};

#define	CHK(name, s)	(*name == s[0] && !strcmp(name, s))

int
msearch(char *str, struct termios *ip)
{
	struct modes *mp;

	for (mp = cmodes; mp->name; ++mp)
		if (CHK(str, mp->name)) {
			ip->c_cflag &= ~mp->unset;
			ip->c_cflag |= mp->set;
			return (1);
		}
	for (mp = imodes; mp->name; ++mp)
		if (CHK(str, mp->name)) {
			ip->c_iflag &= ~mp->unset;
			ip->c_iflag |= mp->set;
			return (1);
		}
	for (mp = lmodes; mp->name; ++mp)
		if (CHK(str, mp->name)) {
			ip->c_lflag &= ~mp->unset;
			ip->c_lflag |= mp->set;
			return (1);
		}
	for (mp = omodes; mp->name; ++mp)
		if (CHK(str, mp->name)) {
			ip->c_oflag &= ~mp->unset;
			ip->c_oflag |= mp->set;
			return (1);
		}
	return (0);
}