/*-
 * Copyright (c) 2003-2007 Tim Kientzle
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``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 AUTHOR(S) 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.
 *
 * $FreeBSD: src/lib/libarchive/archive_private.h,v 1.32 2008/12/06 06:23:37 kientzle Exp $
 */

#ifndef __LIBARCHIVE_BUILD
#error This header is only to be used internally to libarchive.
#endif

#ifndef ARCHIVE_PRIVATE_H_INCLUDED
#define ARCHIVE_PRIVATE_H_INCLUDED

#include "archive.h"
#include "archive_string.h"

#if defined(__BORLANDC__)
# pragma warn -8004 /* Assigned value never used.  */
# pragma warn -8008 /* Condition is always true/false.  */
# pragma warn -8012 /* Compare signed/unsigned.  */
# pragma warn -8053 /* Called function is obsolete.  */
# pragma warn -8057 /* Unused parameter.  */
# pragma warn -8060 /* Possibly incorrect assignment.  */
# pragma warn -8065 /* Call to function without prototype.  */
# pragma warn -8066 /* Unreachable code.  */
# pragma warn -8068 /* Constant out of range in comparison.  */
# pragma warn -8072 /* Suspicious pointer arithmetic.  */
#endif

#if defined(_MSC_VER)
# pragma warning (push,1)
#endif

#if defined(__GNUC__) && (__GNUC__ > 2 || \
              (__GNUC__ == 2 && __GNUC_MINOR__ >= 5))
#define __LA_DEAD   __attribute__((__noreturn__))
#else
#define __LA_DEAD
#endif

#define ARCHIVE_WRITE_MAGIC (0xb0c5c0deU)
#define ARCHIVE_READ_MAGIC  (0xdeb0c5U)
#define ARCHIVE_WRITE_DISK_MAGIC (0xc001b0c5U)
#define ARCHIVE_READ_DISK_MAGIC (0xbadb0c5U)

#define ARCHIVE_STATE_ANY   0xFFFFU
#define ARCHIVE_STATE_NEW   1U
#define ARCHIVE_STATE_HEADER    2U
#define ARCHIVE_STATE_DATA  4U
#define ARCHIVE_STATE_DATA_END  8U
#define ARCHIVE_STATE_EOF   0x10U
#define ARCHIVE_STATE_CLOSED    0x20U
#define ARCHIVE_STATE_FATAL 0x8000U

struct archive_vtable {
    int (*archive_close)(struct archive *);
    int (*archive_finish)(struct archive *);
    int (*archive_write_header)(struct archive *,
        struct archive_entry *);
    int (*archive_write_finish_entry)(struct archive *);
    ssize_t (*archive_write_data)(struct archive *,
        const void *, size_t);
    ssize_t (*archive_write_data_block)(struct archive *,
        const void *, size_t, off_t);
};

struct archive {
    /*
     * The magic/state values are used to sanity-check the
     * client's usage.  If an API function is called at a
     * ridiculous time, or the client passes us an invalid
     * pointer, these values allow me to catch that.
     */
    unsigned int    magic;
    unsigned int    state;

    /*
     * Some public API functions depend on the "real" type of the
     * archive object.
     */
    struct archive_vtable *vtable;

    int       archive_format;
    const char   *archive_format_name;

    int   compression_code; /* Currently active compression. */
    const char *compression_name;

    /* Position in UNCOMPRESSED data stream. */
    int64_t       file_position;
    /* Position in COMPRESSED data stream. */
    int64_t       raw_position;
    /* Number of file entries processed. */
    int       file_count;

    int       archive_error_number;
    const char   *error;
    struct archive_string   error_string;
};

/* Check magic value and state; exit if it isn't valid. */
void    __archive_check_magic(struct archive *, unsigned int magic,
        unsigned int state, const char *func);

void    __archive_errx(int retvalue, const char *msg) __LA_DEAD;

int __archive_parse_options(const char *p, const char *fn,
        int keysize, char *key, int valsize, char *val);

#define err_combine(a,b)    ((a) < (b) ? (a) : (b))

#endif
