|
276
by Razzloss
Copied dcpp/ from 0705-branch |
1 |
/*
|
2 |
* Copyright (C) 2001-2008 Jacek Sieka, arnetheduck on gmail point 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 |
#if !defined(BIT_INPUT_STREAM_H)
|
|
20 |
#define BIT_INPUT_STREAM_H
|
|
21 |
||
22 |
#include "Exception.h" |
|
23 |
||
24 |
namespace dcpp { |
|
25 |
||
26 |
STANDARD_EXCEPTION(BitStreamException); |
|
27 |
||
28 |
/**
|
|
29 |
* A clumsy bit streamer, assumes that there's enough data to complete the operations.
|
|
30 |
* No, doesn't operate on streams...=)
|
|
31 |
*/
|
|
32 |
class BitInputStream |
|
33 |
{
|
|
34 |
public: |
|
35 |
BitInputStream(const uint8_t* aStream, size_t aStart, size_t aEnd) : bitPos(aStart*8), endPos(aEnd*8), is(aStream) { } |
|
36 |
~BitInputStream() { } |
|
37 |
||
38 |
bool get() throw(BitStreamException) { |
|
39 |
if(bitPos > endPos) { |
|
|
300
by David Grundberg
Removed all strings from the Streams.h header included from linux/. PACKAGE definition now used consistantly. Various build script fixes. |
40 |
throw BitStreamException(_("Request to seek beyond the end of data")); |
|
276
by Razzloss
Copied dcpp/ from 0705-branch |
41 |
}
|
42 |
bool ret = (((uint8_t)is[bitPos>>3]) >> (bitPos&0x07)) & 0x01; |
|
43 |
bitPos++; |
|
44 |
return ret; |
|
45 |
}
|
|
46 |
||
47 |
void skipToByte() { |
|
48 |
if(bitPos%8 != 0) |
|
49 |
bitPos = (bitPos & (~7)) + 8; |
|
50 |
}
|
|
51 |
||
52 |
void skip(int n) { |
|
53 |
bitPos += n * 8; |
|
54 |
return ; |
|
55 |
}
|
|
56 |
private: |
|
57 |
BitInputStream(const BitInputStream&); |
|
58 |
BitInputStream& operator=(const BitInputStream&); |
|
59 |
||
60 |
size_t bitPos; |
|
61 |
size_t endPos; |
|
62 |
const uint8_t* is; |
|
63 |
};
|
|
64 |
||
65 |
} // namespace dcpp |
|
66 |
||
67 |
#endif // !defined(BIT_INPUT_STREAM_H) |