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
|
/* gprs_coding_scheme.h
*
* Copyright (C) 2015 by Sysmocom s.f.m.c. GmbH
* Author: Jacob Erlbeck <jerlbeck@sysmocom.de>
*
* This program 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.
*
* This program 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.
*/
#pragma once
#include <stdint.h>
#include <stddef.h>
class GprsCodingScheme {
public:
enum Scheme {
UNKNOWN,
CS1, CS2, CS3, CS4,
MCS1, MCS2, MCS3, MCS4,
MCS5, MCS6, MCS7, MCS8, MCS9,
NUM_SCHEMES
};
enum Mode {
GPRS,
EGPRS_GMSK,
EGPRS,
};
enum HeaderType {
HEADER_INVALID,
HEADER_GPRS_CONTROL,
HEADER_GPRS_DATA,
HEADER_EGPRS_DATA_TYPE_1,
HEADER_EGPRS_DATA_TYPE_2,
HEADER_EGPRS_DATA_TYPE_3,
};
GprsCodingScheme(Scheme s = UNKNOWN);
operator bool() const {return m_scheme != UNKNOWN;}
operator int() const {return (int)m_scheme;}
void operator =(Scheme s);
void operator =(GprsCodingScheme o);
bool isValid() const {return UNKNOWN <= m_scheme && m_scheme <= MCS9;}
bool isGprs() const {return CS1 <= m_scheme && m_scheme <= CS4;}
bool isEgprs() const {return m_scheme >= MCS1;}
bool isEgprsGmsk() const {return isEgprs() && m_scheme <= MCS4;}
bool isCompatible(Mode mode) const;
void inc(Mode mode);
void dec(Mode mode);
unsigned int sizeUL() const;
unsigned int sizeDL() const;
unsigned int maxBytesUL() const;
unsigned int maxBytesDL() const;
unsigned int spareBitsUL() const;
unsigned int spareBitsDL() const;
const char *name() const;
HeaderType headerTypeData() const;
HeaderType headerTypeControl() const;
static GprsCodingScheme getBySizeUL(unsigned size);
private:
enum Scheme m_scheme;
};
inline bool GprsCodingScheme::isCompatible(Mode mode) const
{
switch (mode) {
case GPRS: return isGprs();
case EGPRS_GMSK: return isEgprsGmsk();
case EGPRS: return isEgprs();
}
return false;
}
inline void GprsCodingScheme::inc(Mode mode)
{
if (!isCompatible(mode))
/* This should not happen. TODO: Use assert? */
return;
Scheme new_cs(Scheme(m_scheme + 1));
if (!GprsCodingScheme(new_cs).isCompatible(mode))
/* Clipping, do not change the value */
return;
m_scheme = new_cs;
}
inline void GprsCodingScheme::dec(Mode mode)
{
if (!isCompatible(mode))
/* This should not happen. TODO: Use assert? */
return;
Scheme new_cs(Scheme(m_scheme - 1));
if (!GprsCodingScheme(new_cs).isCompatible(mode))
/* Clipping, do not change the value */
return;
m_scheme = new_cs;
}
inline GprsCodingScheme::HeaderType GprsCodingScheme::headerTypeControl() const
{
return HEADER_GPRS_CONTROL;
}
inline GprsCodingScheme::GprsCodingScheme(Scheme s)
: m_scheme(s)
{
if (!isValid())
m_scheme = UNKNOWN;
}
inline void GprsCodingScheme::operator =(Scheme s)
{
m_scheme = s;
if (!isValid())
m_scheme = UNKNOWN;
}
inline void GprsCodingScheme::operator =(GprsCodingScheme o)
{
m_scheme = o.m_scheme;
}
|
