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
|
/****************************************************************************
* Copyright (C) from 2009 to Present EPAM Systems.
*
* This file is part of Indigo toolkit.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
***************************************************************************/
#include "base_cpp/bitinworker.h"
#include "base_cpp/scanner.h"
using namespace indigo;
BitInWorker::BitInWorker(int StartBits, Scanner& NewIn) : _bits(StartBits), _scanner(NewIn)
{
_bitBuffer = 0L;
_bitBufferCount = 0;
}
bool BitInWorker::isEOF(void)
{
if (_scanner.isEOF())
{
if (_bitBufferCount < _bits)
return true;
else
return false;
}
return false;
}
bool BitInWorker::readBits(int& Code)
{
unsigned int Res;
if (_scanner.isEOF())
{
if (_bitBufferCount < _bits)
return false;
else
{
Res = (_bitBuffer >> (sizeof(int) * 8 - _bits));
_bitBuffer <<= _bits;
_bitBufferCount -= _bits;
Code = Res;
return true;
}
}
while (_bitBufferCount < _bits)
{
int offset = (sizeof(int) - 1) * 8 - _bitBufferCount;
_bitBuffer |= (byte)(_scanner.readByte()) << offset;
_bitBufferCount += 8;
if (_scanner.isEOF())
break;
}
Res = (_bitBuffer >> (sizeof(int) * 8 - _bits));
_bitBuffer <<= _bits;
_bitBufferCount -= _bits;
Code = Res;
return true;
}
BitInWorker::~BitInWorker(void)
{
}
/* END OF 'BITINWORKER.CPP' FILE */
|
