contrib/libarchive-2.1/libarchive/archive_private.h

   1 /*-
   2  * Copyright (c) 2003-2007 Tim Kientzle
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
  15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  17  * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
  18  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  19  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  20  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  21  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  *
  25  * $FreeBSD: src/lib/libarchive/archive_private.h,v 1.29 2007/04/02 00:15:45 kientzle Exp $
  26  */
  27
  28 #ifndef ARCHIVE_PRIVATE_H_INCLUDED
  29 #define ARCHIVE_PRIVATE_H_INCLUDED
  30
  31 #include "archive.h"
  32 #include "archive_string.h"
  33
  34 #define ARCHIVE_WRITE_MAGIC     (0xb0c5c0deU)
  35 #define ARCHIVE_READ_MAGIC      (0xdeb0c5U)
  36 #define ARCHIVE_WRITE_DISK_MAGIC (0xc001b0c5U)
  37
  38 #define ARCHIVE_STATE_ANY       0xFFFFU
  39 #define ARCHIVE_STATE_NEW       1U
  40 #define ARCHIVE_STATE_HEADER    2U
  41 #define ARCHIVE_STATE_DATA      4U
  42 #define ARCHIVE_STATE_DATA_END  8U
  43 #define ARCHIVE_STATE_EOF       0x10U
  44 #define ARCHIVE_STATE_CLOSED    0x20U
  45 #define ARCHIVE_STATE_FATAL     0x8000U
  46
  47 struct archive_vtable {
  48         int     (*archive_write_close)(struct archive *);
  49         int     (*archive_write_finish)(struct archive *);
  50         int     (*archive_write_header)(struct archive *,
  51             struct archive_entry *);
  52         int     (*archive_write_finish_entry)(struct archive *);
  53         ssize_t (*archive_write_data)(struct archive *,
  54             const void *, size_t);
  55         ssize_t (*archive_write_data_block)(struct archive *,
  56             const void *, size_t, off_t);
  57 };
  58
  59 struct archive {
  60         /*
  61          * The magic/state values are used to sanity-check the
  62          * client's usage.  If an API function is called at a
  63          * ridiculous time, or the client passes us an invalid
  64          * pointer, these values allow me to catch that.
  65          */
  66         unsigned int    magic;
  67         unsigned int    state;
  68
  69         /*
  70          * Some public API functions depend on the "real" type of the
  71          * archive object.
  72          */
  73         struct archive_vtable *vtable;
  74
  75         int               archive_format;
  76         const char       *archive_format_name;
  77
  78         int       compression_code;     /* Currently active compression. */
  79         const char *compression_name;
  80
  81         /* Position in UNCOMPRESSED data stream. */
  82         off_t             file_position;
  83         /* Position in COMPRESSED data stream. */
  84         off_t             raw_position;
  85
  86         int               archive_error_number;
  87         const char       *error;
  88         struct archive_string   error_string;
  89 };
  90
  91 /* Check magic value and state; exit if it isn't valid. */
  92 void    __archive_check_magic(struct archive *, unsigned int magic,
  93             unsigned int state, const char *func);
  94
  95 void    __archive_errx(int retvalue, const char *msg);
  96
  97 #define err_combine(a,b)        ((a) < (b) ? (a) : (b))
  98
  99 #endif