contrib/libarchive-2.1/libarchive/archive_write_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_write_private.h,v 1.1 2007/03/03 07:37:36 kientzle Exp $
  26  */
  27
  28 #ifndef ARCHIVE_WRITE_PRIVATE_H_INCLUDED
  29 #define ARCHIVE_WRITE_PRIVATE_H_INCLUDED
  30
  31 #include "archive.h"
  32 #include "archive_string.h"
  33 #include "archive_private.h"
  34
  35 struct archive_write {
  36         struct archive  archive;
  37
  38         /* Dev/ino of the archive being written. */
  39         dev_t             skip_file_dev;
  40         ino_t             skip_file_ino;
  41
  42         /* Utility:  Pointer to a block of nulls. */
  43         const unsigned char     *nulls;
  44         size_t                   null_length;
  45
  46         /* Callbacks to open/read/write/close archive stream. */
  47         archive_open_callback   *client_opener;
  48         archive_write_callback  *client_writer;
  49         archive_close_callback  *client_closer;
  50         void                    *client_data;
  51
  52         /*
  53          * Blocking information.  Note that bytes_in_last_block is
  54          * misleadingly named; I should find a better name.  These
  55          * control the final output from all compressors, including
  56          * compression_none.
  57          */
  58         int               bytes_per_block;
  59         int               bytes_in_last_block;
  60
  61         /*
  62          * These control whether data within a gzip/bzip2 compressed
  63          * stream gets padded or not.  If pad_uncompressed is set,
  64          * the data will be padded to a full block before being
  65          * compressed.  The pad_uncompressed_byte determines the value
  66          * that will be used for padding.  Note that these have no
  67          * effect on compression "none."
  68          */
  69         int               pad_uncompressed;
  70         int               pad_uncompressed_byte; /* TODO: Support this. */
  71
  72         /*
  73          * On write, the client just invokes an archive_write_set function
  74          * which sets up the data here directly.
  75          */
  76         struct {
  77                 void     *data;
  78                 void     *config;
  79                 int     (*init)(struct archive_write *);
  80                 int     (*finish)(struct archive_write *);
  81                 int     (*write)(struct archive_write *, const void *, size_t);
  82         } compressor;
  83
  84         /*
  85          * Again, write support is considerably simpler because there's
  86          * no need for an auction.
  87          */
  88         int               archive_format;
  89         const char       *archive_format_name;
  90
  91         /*
  92          * Pointers to format-specific functions for writing.  They're
  93          * initialized by archive_write_set_format_XXX() calls.
  94          */
  95         void     *format_data;
  96         int     (*format_init)(struct archive_write *);
  97         int     (*format_finish)(struct archive_write *);
  98         int     (*format_destroy)(struct archive_write *);
  99         int     (*format_finish_entry)(struct archive_write *);
 100         int     (*format_write_header)(struct archive_write *,
 101                     struct archive_entry *);
 102         ssize_t (*format_write_data)(struct archive_write *,
 103                     const void *buff, size_t);
 104 };
 105
 106 /*
 107  * Utility function to format a USTAR header into a buffer.  If
 108  * "strict" is set, this tries to create the absolutely most portable
 109  * version of a ustar header.  If "strict" is set to 0, then it will
 110  * relax certain requirements.
 111  *
 112  * Generally, format-specific declarations don't belong in this
 113  * header; this is a rare example of a function that is shared by
 114  * two very similar formats (ustar and pax).
 115  */
 116 int
 117 __archive_write_format_header_ustar(struct archive_write *, char buff[512],
 118     struct archive_entry *, int tartype, int strict);
 119
 120 #endif