blob: ed464d3324dd804b4e27fd3a7f167b54e6009865 (
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
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
/*
* Bzip2 Compressor
* (C) 2001 Peter J Jones
* 2001-2007,2014 Jack Lloyd
* 2006 Matt Johnston
*
* Distributed under the terms of the Botan license
*/
#include <botan/bzip2.h>
#include <botan/internal/comp_util.h>
#define BZ_NO_STDIO
#include <bzlib.h>
namespace Botan {
namespace {
class Bzip2_Stream : public Zlib_Style_Stream<bz_stream, char>
{
public:
Bzip2_Stream()
{
streamp()->opaque = alloc();
streamp()->bzalloc = Compression_Alloc_Info::malloc<int>;
streamp()->bzfree = Compression_Alloc_Info::free;
}
u32bit run_flag() const override { return BZ_RUN; }
u32bit flush_flag() const override { return BZ_FLUSH; }
u32bit finish_flag() const override { return BZ_FINISH; }
};
class Bzip2_Compression_Stream : public Bzip2_Stream
{
public:
Bzip2_Compression_Stream(size_t block_size)
{
int rc = BZ2_bzCompressInit(streamp(), block_size, 0, 0);
if(rc == BZ_MEM_ERROR)
throw std::bad_alloc();
else if(rc != BZ_OK)
throw std::runtime_error("bzip compress initialization failed");
}
~Bzip2_Compression_Stream()
{
BZ2_bzCompressEnd(streamp());
}
bool run(u32bit flags) override
{
int rc = BZ2_bzCompress(streamp(), flags);
if(rc == BZ_MEM_ERROR)
throw std::bad_alloc();
else if(rc < 0)
throw std::runtime_error("bzip compress error");
return (rc == BZ_STREAM_END);
}
};
class Bzip2_Decompression_Stream : public Bzip2_Stream
{
public:
Bzip2_Decompression_Stream()
{
int rc = BZ2_bzDecompressInit(streamp(), 0, 0);
if(rc == BZ_MEM_ERROR)
throw std::bad_alloc();
else if(rc != BZ_OK)
throw std::runtime_error("bzip decompress initialization failed");
}
~Bzip2_Decompression_Stream()
{
BZ2_bzDecompressEnd(streamp());
}
bool run(u32bit) override
{
int rc = BZ2_bzDecompress(streamp());
if(rc == BZ_MEM_ERROR)
throw std::bad_alloc();
else if(rc != BZ_OK && rc != BZ_STREAM_END)
throw std::runtime_error("bzip decompress error");
return (rc == BZ_STREAM_END);
}
};
}
Compression_Stream* Bzip2_Compression::make_stream() const
{
return new Bzip2_Compression_Stream(m_block_size);
}
Compression_Stream* Bzip2_Decompression::make_stream() const
{
return new Bzip2_Decompression_Stream;
}
}
|
