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Simplify and improve the way options are parsed and remove ~300 lines
of code that becomes unused. Few command line arguments changes are
required though:

  - stream definitions (-ios) now must follow devices definitions they
    are attached to (-fMn)

  - the -n option is now a special "loopback" device and is thus used
    like -f, eg it must precede streams

  - in midicat, midi thru boxes are not created automatically anymore,
    the new "-M" option must be used for that

  - channel numbers (-Cc options) correspond always to channel numbers
    of the hardware.

  - the -u option isn't needed anymore

  - increase the log verbosity so user errors are logged
    without using -d

tested by many, help from jmc

/*	$OpenBSD: opt.h,v 1.10 2011/10/12 07:20:04 ratchov Exp $	*/
/*
 * Copyright (c) 2008 Alexandre Ratchov <alex@caoua.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
#ifndef OPT_H
#define OPT_H

#include <sys/queue.h>
#include "aparams.h"

struct dev;

struct opt {
	struct opt *next;
#define OPT_NAMEMAX 11
	char name[OPT_NAMEMAX + 1];
	int maxweight;		/* max dynamic range for clients */
	struct aparams wpar;	/* template for clients write params */
	struct aparams rpar;	/* template for clients read params */
	int mmc;		/* true if MMC control enabled */
	int join;		/* true if join/expand enabled */
	unsigned mode;		/* bitmap of MODE_XXX */
	struct dev *dev;	/* device to which we're attached */
};

extern struct opt *opt_list;

struct opt *opt_new(char *, struct dev *, struct aparams *, struct aparams *,
    int, int, int, unsigned);
int opt_bind(struct opt *);
struct opt *opt_byname(char *);

#endif /* !defined(OPT_H) */