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
| [iyunv@linux tmp]# cat logger.h
#ifndef LOGGER_UTIL_INCLUDED
#define LOGGER_UTIL_INCLUDED
/*
Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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; version 2 of the License.
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
A trivial placeholder for inserting Time signatures into streams.
@example cout << Datetime() << "[Info] Today was a sunny day" << endl;
*/
#include <ostream>
#include <string>
#include <sstream>
using namespace std;
struct Datetime {};
ostream &operator<<(ostream &os, const Datetime &dt);
class Gen_spaces
{
public:
Gen_spaces(int s)
{
m_spaces.assign(s,' ');
}
ostream &operator<<(ostream &os)
{
return os;
}
friend ostream &operator<<(ostream &os, const Gen_spaces &gen);
private:
string m_spaces;
};
ostream &operator<<(ostream &os, const Gen_spaces &gen);
class Log : public ostream
{
public:
Log(ostream &str, string logclass) :
ostream(NULL), m_buffer(str, logclass)
{
this->init(&m_buffer);
}
void enabled(bool s) { m_buffer.enabled(s); }
private:
class Log_buff : public stringbuf
{
public:
Log_buff(ostream &str, string &logc)
:m_os(str),m_logc(logc), m_enabled(true)
{}
void set_log_class(string &s) { m_logc= s; }
void enabled(bool s) { m_enabled= s; }
virtual int sync();
private:
ostream &m_os;
string m_logc;
bool m_enabled;
};
Log_buff m_buffer;
};
#endif /* LOGGER_UTIL_INCLUDED */
[iyunv@linux tmp]# cat logger.cc
/*
Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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; version 2 of the License.
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "logger.h"
#include <iostream>
#include <locale>
ostream &operator<<(ostream &os, const Datetime &dt)
{
const char format[]= "%Y-%m-%d %X";
time_t t(time(NULL));
tm tm(*localtime(&t));
std::locale loc(cout.getloc());
ostringstream sout;
const std::time_put<char> &tput =
std::use_facet<std::time_put<char> >(loc);
tput.put(sout.rdbuf(), sout, '\0', &tm, &format[0], &format[11]);
os << sout.str() << " ";
return os;
}
ostream &operator<<(ostream &os, const Gen_spaces &gen)
{
return os << gen.m_spaces;
}
int Log::Log_buff::sync()
{
string sout(str());
if (m_enabled && sout.length() > 0)
{
m_os << Datetime() << "[" << m_logc << "]"<< Gen_spaces(8-m_logc.length()) << sout;
}
str("");
m_os.flush();
return 0;
}
[iyunv@linux tmp]# cat main.cpp
#include <iostream>
#include "logger.h"
using namespace std;
int main(void)
{
cout << Datetime() << "[测试] 今天的天气不错!" << endl;
return 0;
}
[iyunv@linux tmp]# g++ main.cpp logger.cc && ./a.out
2016-11-03 17:44:09 [测试] 今天的天气不错!
[iyunv@linux tmp]#
|