blob: d672707b2b85c423747edba4fed52a2eba11b4eb (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
// *****************************************************************************
// * This file is part of the FreeFileSync project. It is distributed under *
// * GNU General Public License: https://www.gnu.org/licenses/gpl-3.0 *
// * Copyright (C) Zenju (zenju AT freefilesync DOT org) - All Rights Reserved *
// *****************************************************************************
#ifndef ZLIB_WRAP_H_428597064566
#define ZLIB_WRAP_H_428597064566
#include <functional>
#include "sys_error.h"
namespace zen
{
// compression level must be between 0 and 9:
// 0: no compression
// 9: best compression
std::string compress(const std::string_view& stream, int level); //throw SysError
//caveat: output stream is physically larger than input! => strip additional reserved space if needed: "BinContainer(output.begin(), output.end())"
std::string decompress(const std::string_view& stream); //throw SysError
class InputStreamAsGzip //convert input stream into gzip on the fly
{
public:
explicit InputStreamAsGzip(const std::function<size_t(void* buffer, size_t bytesToRead)>& tryReadBlock /*throw X; may return short, only 0 means EOF!*/,
size_t blockSize); //throw SysError
~InputStreamAsGzip();
size_t getBlockSize() const;
size_t read(void* buffer, size_t bytesToRead); //throw SysError, X; return "bytesToRead" bytes unless end of stream!
private:
class Impl;
const std::unique_ptr<Impl> pimpl_;
};
std::string compressAsGzip(const std::string_view& stream); //throw SysError
}
#endif //ZLIB_WRAP_H_428597064566
|
