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
110
111
112
113
114
115
116
117
118
119
120
121
122
|
/* file.cpp
*
* Copyright (C) 2003 Sawtooth Consulting Ltd.
*
* This file is part of yaSSL.
*
* yaSSL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* There are special exceptions to the terms and conditions of the GPL as it
* is applied to yaSSL. View the full text of the exception in the file
* FLOSS-EXCEPTIONS in the directory of this software distribution.
*
* yaSSL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
/* file.cpp implements File Sources and Sinks
*/
#include "runtime.hpp"
#include "file.hpp"
namespace TaoCrypt {
FileSource::FileSource(const char* fname, Source& source)
{
file_ = fopen(fname, "rb");
if (file_) get(source);
}
FileSource::~FileSource()
{
if (file_)
fclose(file_);
}
// return size of source from beginning or current position
word32 FileSource::size(bool use_current)
{
long current = ftell(file_);
long begin = current;
if (!use_current) {
fseek(file_, 0, SEEK_SET);
begin = ftell(file_);
}
fseek(file_, 0, SEEK_END);
long end = ftell(file_);
fseek(file_, current, SEEK_SET);
return end - begin;
}
word32 FileSource::size_left()
{
return size(true);
}
// fill file source from source
word32 FileSource::get(Source& source)
{
word32 sz(size());
if (source.size() < sz)
source.grow(sz);
size_t bytes = fread(source.buffer_.get_buffer(), 1, sz, file_);
if (bytes == 1)
return sz;
else
return 0;
}
FileSink::FileSink(const char* fname, Source& source)
{
file_ = fopen(fname, "wb");
if (file_) put(source);
}
FileSink::~FileSink()
{
if (file_)
fclose(file_);
}
// fill source from file sink
void FileSink::put(Source& source)
{
fwrite(source.get_buffer(), 1, source.size(), file_);
}
// swap with other and reset to beginning
void Source::reset(ByteBlock& otherBlock)
{
buffer_.Swap(otherBlock);
current_ = 0;
}
} // namespace
|
