Disk ARchive 2.7.16
Full featured and portable backup and archiving tool
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mem_block.hpp
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1/*********************************************************************/
2// dar - disk archive - a backup/restoration program
3// Copyright (C) 2002-2024 Denis Corbin
4//
5// This program is free software; you can redistribute it and/or
6// modify it under the terms of the GNU General Public License
7// as published by the Free Software Foundation; either version 2
8// of the License, or (at your option) any later version.
9//
10// This program is distributed in the hope that it will be useful,
11// but WITHOUT ANY WARRANTY; without even the implied warranty of
12// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13// GNU General Public License for more details.
14//
15// You should have received a copy of the GNU General Public License
16// along with this program; if not, write to the Free Software
17// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18//
19// to contact the author, see the AUTHOR file
20/*********************************************************************/
21
26
27#ifndef MEM_BLOCK_HPP
28#define MEM_BLOCK_HPP
29
30#include "../my_config.h"
31#include <string>
32
33#include "integers.hpp"
34
35namespace libdar
36{
37
40
41 class mem_block
42 {
43 public:
44 mem_block(U_I size = 0);
45 mem_block(const mem_block & ref) = delete;
46 mem_block(mem_block && ref) noexcept;
47 mem_block & operator = (const mem_block & ref) = delete;
48 mem_block & operator = (mem_block && ref) noexcept;
49 virtual ~mem_block();
50
51
52 void resize(U_I size);
53
54 U_I read(char *a, U_I size);
55 U_I write(const char *a, U_I size);
56 void rewind_read(U_I offset = 0);
57 void reset() { data_size = 0; read_cursor = 0; write_cursor = 0; };
58 U_I get_max_size() const { return alloc_size; };
59 U_I get_data_size() const { return data_size; };
60 U_I get_read_offset() const { return read_cursor; };
61 bool all_is_read() const { return read_cursor == data_size; };
62 bool is_full() const { return data_size == alloc_size; };
63 bool is_empty() const { return data_size == 0; };
64
65 char* get_addr() { return data; };
66 void set_data_size(U_I size);
67
68 private:
69 char* data;
70 U_I alloc_size;
71 U_I data_size;
72 U_I read_cursor;
73 U_I write_cursor;
74
75 void move_from(mem_block && ref);
76 };
77
78
80
81} // end of namespace
82
83#endif
are defined here basic integer types that tend to be portable
include macro defined by the configure script and some specific additional ones
libdar namespace encapsulate all libdar symbols
Definition archive.hpp:47