/*	$NetBSD: pack_dev.c,v 1.12 2013/06/14 16:28:20 tsutsui Exp $	*/

/*-

 * Copyright (c) 1998, 2001 The NetBSD Foundation, Inc.

 * All rights reserved.

 *

 * This code is derived from software contributed to The NetBSD Foundation

 * by Charles M. Hannum.

 *

 * 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.

 *

 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.

 */

/* Originally from NetBSD's mknod(8) source. */

#include "archive_platform.h"

#if HAVE_SYS_CDEFS_H

#include <sys/cdefs.h>

#endif

#if !defined(lint)

__RCSID("$NetBSD$");

#endif /* not lint */

#ifdef HAVE_LIMITS_H

#include <limits.h>

#endif

#include <stdio.h>

#ifdef HAVE_STDLIB_H

#include <stdlib.h>

#endif

#ifdef HAVE_STRING_H

#include <string.h>

#endif

#ifdef HAVE_SYS_TYPES_H

#include <sys/types.h>

#endif

#ifdef HAVE_SYS_STAT_H

#include <sys/stat.h>

#endif

#ifdef HAVE_SYS_SYSMACROS_H

#include <sys/sysmacros.h>

#endif

#ifdef HAVE_UNISTD_H

#include <unistd.h>

#endif

#include "archive_pack_dev.h"

static	pack_t	pack_netbsd;

static	pack_t	pack_freebsd;

static	pack_t	pack_8_8;

static	pack_t	pack_12_20;

static	pack_t	pack_14_18;

static	pack_t	pack_8_24;

static	pack_t	pack_bsdos;

static	int	compare_format(const void *, const void *);

static const char iMajorError[] = "invalid major number";

static const char iMinorError[] = "invalid minor number";

static const char tooManyFields[] = "too many fields for format";

/* This is blatantly stolen from libarchive/archive_entry.c,

 * in an attempt to get this to play nice on MinGW... */

#if !defined(HAVE_MAJOR) && !defined(major)

/* Replacement for major/minor/makedev. */

#define major(x) ((int)(0x00ff & ((x) >> 8)))

#define minor(x) ((int)(0xffff00ff & (x)))

#define makedev(maj,min) ((0xff00 & ((maj)<<8)) | (0xffff00ff & (min)))

#endif

/* Play games to come up with a suitable makedev() definition. */

#ifdef __QNXNTO__

/* QNX.  <sigh> */

#include <sys/netmgr.h>

#define apd_makedev(maj, min) makedev(ND_LOCAL_NODE, (maj), (min))

#elif defined makedev

/* There's a "makedev" macro. */

#define apd_makedev(maj, min) makedev((maj), (min))

#elif defined mkdev || ((defined _WIN32 || defined __WIN32__) && !defined(__CYGWIN__))

/* Windows. <sigh> */

#define apd_makedev(maj, min) mkdev((maj), (min))

#else

/* There's a "makedev" function. */

#define apd_makedev(maj, min) makedev((maj), (min))

#endif

/* exported */

dev_t

pack_native(int n, unsigned long numbers[], const char **error)

{

	dev_t dev = 0;

	if (n == 2) {

		dev = apd_makedev(numbers[0], numbers[1]);

		if ((unsigned long)major(dev) != numbers[0])

			*error = iMajorError;

		else if ((unsigned long)minor(dev) != numbers[1])

			*error = iMinorError;

	} else

		*error = tooManyFields;

	return (dev);

}

static dev_t

pack_netbsd(int n, unsigned long numbers[], const char **error)

{

	dev_t dev = 0;

	if (n == 2) {

		dev = makedev_netbsd(numbers[0], numbers[1]);

		if ((unsigned long)major_netbsd(dev) != numbers[0])

			*error = iMajorError;

		else if ((unsigned long)minor_netbsd(dev) != numbers[1])

			*error = iMinorError;

	} else

		*error = tooManyFields;

	return (dev);

}

#define	major_freebsd(x)	((int32_t)(((x) & 0x0000ff00) >> 8))

#define	minor_freebsd(x)	((int32_t)(((x) & 0xffff00ff) >> 0))

#define	makedev_freebsd(x,y)	((dev_t)((((x) << 8) & 0x0000ff00) | \

					 (((y) << 0) & 0xffff00ff)))

static dev_t

pack_freebsd(int n, unsigned long numbers[], const char **error)

{

	dev_t dev = 0;

	if (n == 2) {

		dev = makedev_freebsd(numbers[0], numbers[1]);

		if ((unsigned long)major_freebsd(dev) != numbers[0])

			*error = iMajorError;

		if ((unsigned long)minor_freebsd(dev) != numbers[1])

			*error = iMinorError;

	} else

		*error = tooManyFields;

	return (dev);

}

#define	major_8_8(x)		((int32_t)(((x) & 0x0000ff00) >> 8))

#define	minor_8_8(x)		((int32_t)(((x) & 0x000000ff) >> 0))

#define	makedev_8_8(x,y)	((dev_t)((((x) << 8) & 0x0000ff00) | \

					 (((y) << 0) & 0x000000ff)))

static dev_t

pack_8_8(int n, unsigned long numbers[], const char **error)

{

	dev_t dev = 0;

	if (n == 2) {

		dev = makedev_8_8(numbers[0], numbers[1]);

		if ((unsigned long)major_8_8(dev) != numbers[0])

			*error = iMajorError;

		if ((unsigned long)minor_8_8(dev) != numbers[1])

			*error = iMinorError;

	} else

		*error = tooManyFields;

	return (dev);

}

#define	major_12_20(x)		((int32_t)(((x) & 0xfff00000) >> 20))

#define	minor_12_20(x)		((int32_t)(((x) & 0x000fffff) >>  0))

#define	makedev_12_20(x,y)	((dev_t)((((x) << 20) & 0xfff00000) | \

					 (((y) <<  0) & 0x000fffff)))

static dev_t

pack_12_20(int n, unsigned long numbers[], const char **error)

{

	dev_t dev = 0;

	if (n == 2) {

		dev = makedev_12_20(numbers[0], numbers[1]);

		if ((unsigned long)major_12_20(dev) != numbers[0])

			*error = iMajorError;

		if ((unsigned long)minor_12_20(dev) != numbers[1])

			*error = iMinorError;

	} else

		*error = tooManyFields;

	return (dev);

}

#define	major_14_18(x)		((int32_t)(((x) & 0xfffc0000) >> 18))

#define	minor_14_18(x)		((int32_t)(((x) & 0x0003ffff) >>  0))

#define	makedev_14_18(x,y)	((dev_t)((((x) << 18) & 0xfffc0000) | \

					 (((y) <<  0) & 0x0003ffff)))

static dev_t

pack_14_18(int n, unsigned long numbers[], const char **error)

{

	dev_t dev = 0;

	if (n == 2) {

		dev = makedev_14_18(numbers[0], numbers[1]);

		if ((unsigned long)major_14_18(dev) != numbers[0])

			*error = iMajorError;

		if ((unsigned long)minor_14_18(dev) != numbers[1])

			*error = iMinorError;

	} else

		*error = tooManyFields;

	return (dev);

}

#define	major_8_24(x)		((int32_t)(((x) & 0xff000000) >> 24))

#define	minor_8_24(x)		((int32_t)(((x) & 0x00ffffff) >>  0))

#define	makedev_8_24(x,y)	((dev_t)((((x) << 24) & 0xff000000) | \

					 (((y) <<  0) & 0x00ffffff)))

static dev_t

pack_8_24(int n, unsigned long numbers[], const char **error)

{

	dev_t dev = 0;

	if (n == 2) {

		dev = makedev_8_24(numbers[0], numbers[1]);

		if ((unsigned long)major_8_24(dev) != numbers[0])

			*error = iMajorError;

		if ((unsigned long)minor_8_24(dev) != numbers[1])

			*error = iMinorError;

	} else

		*error = tooManyFields;

	return (dev);

}

#define	major_12_12_8(x)	((int32_t)(((x) & 0xfff00000) >> 20))

#define	unit_12_12_8(x)		((int32_t)(((x) & 0x000fff00) >>  8))

#define	subunit_12_12_8(x)	((int32_t)(((x) & 0x000000ff) >>  0))

#define	makedev_12_12_8(x,y,z)	((dev_t)((((x) << 20) & 0xfff00000) | \

					 (((y) <<  8) & 0x000fff00) | \

					 (((z) <<  0) & 0x000000ff)))

static dev_t

pack_bsdos(int n, unsigned long numbers[], const char **error)

{

	dev_t dev = 0;

	if (n == 2) {

		dev = makedev_12_20(numbers[0], numbers[1]);

		if ((unsigned long)major_12_20(dev) != numbers[0])

			*error = iMajorError;

		if ((unsigned long)minor_12_20(dev) != numbers[1])

			*error = iMinorError;

	} else if (n == 3) {

		dev = makedev_12_12_8(numbers[0], numbers[1], numbers[2]);

		if ((unsigned long)major_12_12_8(dev) != numbers[0])

			*error = iMajorError;

		if ((unsigned long)unit_12_12_8(dev) != numbers[1])

			*error = "invalid unit number";

		if ((unsigned long)subunit_12_12_8(dev) != numbers[2])

			*error = "invalid subunit number";

	} else

		*error = tooManyFields;

	return (dev);

}

		/* list of formats and pack functions */

		/* this list must be sorted lexically */

static const struct format {

	const char	*name;

	pack_t		*pack;

} formats[] = {

	{"386bsd",  pack_8_8},

	{"4bsd",    pack_8_8},

	{"bsdos",   pack_bsdos},

	{"freebsd", pack_freebsd},

	{"hpux",    pack_8_24},

	{"isc",     pack_8_8},

	{"linux",   pack_8_8},

	{"native",  pack_native},

	{"netbsd",  pack_netbsd},

	{"osf1",    pack_12_20},

	{"sco",     pack_8_8},

	{"solaris", pack_14_18},

	{"sunos",   pack_8_8},

	{"svr3",    pack_8_8},

	{"svr4",    pack_14_18},

	{"ultrix",  pack_8_8},

};

static int

compare_format(const void *key, const void *element)

{

	const char		*name;

	const struct format	*format;

	name = key;

	format = element;

	return (strcmp(name, format->name));

}

pack_t *

pack_find(const char *name)

{

	struct format	*format;

	format = bsearch(name, formats,

	    sizeof(formats)/sizeof(formats[0]),

	    sizeof(formats[0]), compare_format);

	if (format == 0)

		return (NULL);

	return (format->pack);

}