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
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
/*
* Copyright (c) 2012, Chris Johns <chrisj@rtems.org>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/**
* @file
*
* @ingroup rtems_ld
*
* @brief RTEMS Linker.
*
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <fstream>
#include <iostream>
#include <errno.h>
#include <string.h>
#include <rld.h>
#include <rld-compression.h>
#include "fastlz.h"
namespace rld
{
namespace compress
{
compressor::compressor (files::image& image,
size_t size,
bool compress)
: image (image),
size (size),
compress (compress),
buffer (0),
io (0),
level (0),
total (0),
total_compressed (0)
{
if (size > 0xffff)
throw rld::error ("Size too big, 16 bits only", "compression");
buffer = new uint8_t[size];
io = new uint8_t[size + (size / 10)];
}
compressor::~compressor ()
{
flush ();
delete [] buffer;
delete [] io;
}
void
compressor::write (const void* data_, size_t length)
{
const uint8_t* data = static_cast <const uint8_t*> (data_);
while (length)
{
size_t appending;
if (length > (size - level))
appending = size - level;
else
appending = length;
::memcpy ((void*) (buffer + level), data, appending);
data += appending;
level += appending;
length -= appending;
total += appending;
output ();
}
}
void
compressor::write (files::image& input, off_t offset, size_t length)
{
input.seek (offset);
while (length)
{
size_t appending;
if (length > (size - level))
appending = size - level;
else
appending = length;
input.read ((void*) (buffer + level), appending);
level += appending;
length -= appending;
total += appending;
output ();
}
}
void
compressor::flush ()
{
output (true);
}
size_t
compressor::transferred () const
{
return total;
}
size_t
compressor::compressed () const
{
return total_compressed;
}
void
compressor::output (bool forced)
{
if ((forced && level) || (level >= size))
{
if (compress)
{
int writing = ::fastlz_compress (buffer, level, io);
uint8_t header[2];
if (rld::verbose () >= RLD_VERBOSE_FULL_DEBUG)
std::cout << "rtl: comp: offset=" << total_compressed
<< " block-size=" << writing << std::endl;
header[0] = writing >> 8;
header[1] = writing;
image.write (header, 2);
image.write (io, writing);
total_compressed += 2 + writing;
}
else
{
image.write (buffer, level);
}
level = 0;
}
}
}
}
|
