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
170
171
172
173
174
|
/*
Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
Her Majesty the Queen in Right of Canada (Communications Research
Center Canada)
Copyright (C), 2014, Matthias P. Braendli, matthias.braendli@mpb.li
*/
/*
This file is part of CRC-DADMOD.
CRC-DADMOD 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 3 of the
License, or (at your option) any later version.
CRC-DADMOD 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 CRC-DADMOD. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _LOG_H
#define _LOG_H
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdio.h>
#include <syslog.h>
#include <fstream>
#include <sstream>
#include <iostream>
#include <list>
#include <stdexcept>
#include <string>
#include "porting.h"
#define SYSLOG_IDENT "CRC-DABMUX"
#define SYSLOG_FACILITY LOG_LOCAL0
extern Logger etiLog;
enum log_level_t {debug = 0, info, warn, error, alert, emerg};
/** Abstract class all backends must inherit from */
class LogBackend {
public:
virtual void log(log_level_t level, std::string message) = 0;
virtual std::string get_name() = 0;
};
/** A Logging backend for Syslog */
class LogToSyslog : public LogBackend {
public:
LogToSyslog() {
name = "SYSLOG";
openlog(SYSLOG_IDENT, LOG_PID, SYSLOG_FACILITY);
}
~LogToSyslog() {
closelog();
}
void log(log_level_t level, std::string message) {
int syslog_level = LOG_EMERG;
switch (level) {
case debug: syslog_level = LOG_DEBUG; break;
case alert: syslog_level = LOG_ALERT; break;
case info: syslog_level = LOG_INFO; break;
case warn: syslog_level = LOG_WARNING; break;
case error: syslog_level = LOG_ERR; break;
case emerg: syslog_level = LOG_EMERG; break;
}
syslog(syslog_level, SYSLOG_IDENT " %s", message.c_str());
}
std::string get_name() { return name; };
private:
std::string name;
};
class LogToFile : public LogBackend {
public:
LogToFile(std::string filename) {
name = "FILE";
log_file = fopen(filename.c_str(), "a");
if (log_file == NULL) {
fprintf(stderr, "Cannot open log file !");
throw std::runtime_error("Cannot open log file !");
}
}
~LogToFile() {
if (log_file != NULL) {
fclose(log_file);
}
}
void log(log_level_t level, std::string message) {
const char* log_level_text[] =
{"DEBUG", "INFO", "WARN", "ERROR", "ALERT", "EMERG"};
// fprintf is thread-safe
fprintf(log_file, "CRC-DABMOD: %s: %s\n",
log_level_text[(size_t)level], message.c_str());
fflush(log_file);
}
std::string get_name() { return name; };
private:
std::string name;
FILE* log_file;
};
class LogLine;
class Logger {
public:
Logger() {};
void register_backend(LogBackend* backend);
/* Log the message to all backends */
void log(log_level_t level, std::string message);
/* Return a LogLine for the given level */
LogLine level(log_level_t level);
private:
std::list<LogBackend*> backends;
};
// Accumulate a line of logs, using same syntax as stringstream
// The line is logged when the LogLine gets destroyed
class LogLine {
public:
LogLine(const LogLine& logline);
LogLine(Logger* logger, log_level_t level) :
logger_(logger)
{
level_ = level;
}
// Push the new element into the stringstream
template <typename T>
LogLine& operator<<(T s) {
os << s;
return *this;
}
~LogLine()
{
logger_->log(level_, os.str());
}
private:
std::ostringstream os;
log_level_t level_;
Logger* logger_;
};
#endif
|
