contrib/libarchive/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 1.32 2008/12/06 06:23:37 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 #if defined(__GNUC__) && (__GNUC__ > 2 || \
  35                           (__GNUC__ == 2 && __GNUC_MINOR__ >= 5))
  36 #define __LA_DEAD       __attribute__((__noreturn__))
  37 #else
  38 #define __LA_DEAD
  39 #endif
  40
  41 #define ARCHIVE_WRITE_MAGIC     (0xb0c5c0deU)
  42 #define ARCHIVE_READ_MAGIC      (0xdeb0c5U)
  43 #define ARCHIVE_WRITE_DISK_MAGIC (0xc001b0c5U)
  44 #define ARCHIVE_READ_DISK_MAGIC (0xbadb0c5U)
  45
  46 #define ARCHIVE_STATE_ANY       0xFFFFU
  47 #define ARCHIVE_STATE_NEW       1U
  48 #define ARCHIVE_STATE_HEADER    2U
  49 #define ARCHIVE_STATE_DATA      4U
  50 #define ARCHIVE_STATE_DATA_END  8U
  51 #define ARCHIVE_STATE_EOF       0x10U
  52 #define ARCHIVE_STATE_CLOSED    0x20U
  53 #define ARCHIVE_STATE_FATAL     0x8000U
  54
  55 struct archive_vtable {
  56         int     (*archive_close)(struct archive *);
  57         int     (*archive_finish)(struct archive *);
  58         int     (*archive_write_header)(struct archive *,
  59             struct archive_entry *);
  60         int     (*archive_write_finish_entry)(struct archive *);
  61         ssize_t (*archive_write_data)(struct archive *,
  62             const void *, size_t);
  63         ssize_t (*archive_write_data_block)(struct archive *,
  64             const void *, size_t, off_t);
  65 };
  66
  67 struct archive {
  68         /*
  69          * The magic/state values are used to sanity-check the
  70          * client's usage.  If an API function is called at a
  71          * ridiculous time, or the client passes us an invalid
  72          * pointer, these values allow me to catch that.
  73          */
  74         unsigned int    magic;
  75         unsigned int    state;
  76
  77         /*
  78          * Some public API functions depend on the "real" type of the
  79          * archive object.
  80          */
  81         struct archive_vtable *vtable;
  82
  83         int               archive_format;
  84         const char       *archive_format_name;
  85
  86         int       compression_code;     /* Currently active compression. */
  87         const char *compression_name;
  88
  89         /* Position in UNCOMPRESSED data stream. */
  90         off_t             file_position;
  91         /* Position in COMPRESSED data stream. */
  92         off_t             raw_position;
  93
  94         int               archive_error_number;
  95         const char       *error;
  96         struct archive_string   error_string;
  97 };
  98
  99 /* Check magic value and state; exit if it isn't valid. */
 100 void    __archive_check_magic(struct archive *, unsigned int magic,
 101             unsigned int state, const char *func);
 102
 103 void    __archive_errx(int retvalue, const char *msg) __LA_DEAD;
 104
 105 int     __archive_parse_options(const char *p, const char *fn,
 106             int keysize, char *key, int valsize, char *val);
 107
 108 #define err_combine(a,b)        ((a) < (b) ? (a) : (b))
 109
 110 #endif