A modern Music Player Daemon based on Rockbox open source high quality audio player
tsiry-sandratraina.com
libadwaita
audio
rust
zig
deno
mpris
rockbox
mpd
1/* zenutils - Utilities for working with creative firmwares.
2 * Copyright 2007 (c) Rasmus Ry <rasmus.ry{at}gmail.com>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 */
18
19#include "file.h"
20#include <fstream>
21
22
23bool shared::read_file(const std::string& filename, bytes& buffer,
24 std::streampos offset, std::streamsize count)
25{
26 std::ifstream ifs;
27 ifs.open(filename.c_str(), std::ios::binary);
28 if (!ifs)
29 {
30 return false;
31 }
32
33 std::ifstream::pos_type startpos = offset;
34 ifs.seekg(offset, std::ios::beg);
35 if (count == -1)
36 ifs.seekg(0, std::ios::end);
37 else
38 ifs.seekg(count, std::ios::cur);
39 std::ifstream::pos_type endpos = ifs.tellg();
40
41 buffer.resize(endpos-startpos);
42 ifs.seekg(offset, std::ios::beg);
43
44 ifs.read((char*)&buffer[0], endpos-startpos);
45
46 ifs.close();
47 return ifs.good();
48}
49
50
51bool shared::write_file(const std::string& filename, bytes& buffer,
52 bool truncate, std::streampos offset,
53 std::streamsize count)
54{
55 std::ios::openmode mode = std::ios::in|std::ios::out|std::ios::binary;
56 if (truncate)
57 mode |= std::ios::trunc;
58
59 std::fstream ofs;
60 ofs.open(filename.c_str(), mode);
61 if (!ofs)
62 {
63 return false;
64 }
65
66 if (count == -1)
67 count = buffer.size();
68 else if (count > buffer.size())
69 return false;
70
71 ofs.seekg(offset, std::ios::beg);
72
73 ofs.write((char*)&buffer[0], count);
74
75 ofs.close();
76 return ofs.good();
77}
78
79bool shared::file_exists(const std::string& filename)
80{
81 std::ifstream ifs;
82 ifs.open(filename.c_str(), std::ios::in);
83 if (ifs.is_open())
84 {
85 ifs.close();
86 return true;
87 }
88 return false;
89}
90
91bool shared::copy_file(const std::string& srcname, const std::string& dstname)
92{
93 bytes buffer;
94 if (!read_file(srcname, buffer))
95 return false;
96 return write_file(dstname, buffer, true);
97}
98
99bool shared::backup_file(const std::string& filename, bool force)
100{
101 std::string backupname = filename + ".bak";
102 if (!force)
103 if (file_exists(backupname))
104 return true;
105 return copy_file(filename, backupname);
106}