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
|
/**********
This library is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the
Free Software Foundation; either version 2.1 of the License, or (at your
option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.)
This library 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 Lesser General Public License for
more details.
You should have received a copy of the GNU Lesser General Public License
along with this library; if not, write to the Free Software Foundation, Inc.,
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
**********/
// "liveMedia"
// Copyright (c) 1996-2005 Live Networks, Inc. All rights reserved.
// Bit Vector data structure
// C++ header
#ifndef _BIT_VECTOR_HH
#define _BIT_VECTOR_HH
class BitVector {
public:
BitVector(unsigned char* baseBytePtr,
unsigned baseBitOffset,
unsigned totNumBits);
void setup(unsigned char* baseBytePtr,
unsigned baseBitOffset,
unsigned totNumBits);
void putBits(unsigned from, unsigned numBits); // "numBits" <= 32
void put1Bit(unsigned bit);
unsigned getBits(unsigned numBits); // "numBits" <= 32
unsigned get1Bit();
void skipBits(unsigned numBits);
unsigned curBitIndex() const { return fCurBitIndex; }
unsigned totNumBits() const { return fTotNumBits; }
unsigned numBitsRemaining() const { return fTotNumBits - fCurBitIndex; }
private:
unsigned char* fBaseBytePtr;
unsigned fBaseBitOffset;
unsigned fTotNumBits;
unsigned fCurBitIndex;
};
// A general bit copy operation:
void shiftBits(unsigned char* toBasePtr, unsigned toBitOffset,
unsigned char const* fromBasePtr, unsigned fromBitOffset,
unsigned numBits);
#endif
|
