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
|
/*******************************************************************************
The MIT License (MIT)
Copyright (c) 2015 Alexander Zolotarev <me@alex.bio> from Minsk, Belarus
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*******************************************************************************/
#ifndef LOGGER_H
#define LOGGER_H
#include <ctime>
#include <sstream>
#if defined(__OBJC__)
#include <Foundation/Foundation.h>
#elif defined(ANDROID)
#include <android/log.h>
#else
#include <iostream>
#endif
// Pretty-printing for std::pair.
template <typename T, typename U>
std::ostream & operator<<(std::ostream & out, const std::pair<T, U> & p) {
out << p.first << "=" << p.second;
return out;
}
namespace alohalytics {
class Logger {
std::ostringstream out_;
public:
Logger() = default;
Logger(const char * file, int line) { out_ << file << ':' << line << ": "; }
~Logger() {
#if defined(__OBJC__)
// NSLog prints time automatically.
NSLog(@"Alohalytics: %s", out_.str().c_str());
#elif defined(ANDROID)
// Android also prints time automatically.
__android_log_print(ANDROID_LOG_INFO, "Alohalytics", "%s", out_.str().c_str());
#else
char buf[100] = "";
const time_t now = time(nullptr);
(void)::strftime(buf, sizeof(buf), "%d/%b/%Y:%H:%M:%S ", ::localtime(&now));
std::cout << buf << "Alohalytics: " << out_.str() << std::flush << std::endl;
#endif
}
template <typename T, typename... ARGS>
void Log(const T & arg1, const ARGS &... others) {
Log(arg1);
out_ << ' ';
Log(others...);
}
void Log() {}
template <typename T>
void Log(const T & t) {
out_ << t;
}
// String specialization to avoid printing every character as a container's element.
void Log(const std::string & t) {
if (t.empty()) {
out_ << "<EMPTY_STRING>";
} else {
out_ << t;
}
}
// Specialization to work with nullptr
void Log(const char * t) {
if (t) {
out_ << t;
} else {
out_ << "<NULL>";
}
}
// Pretty-printing for containers.
template <template <typename, typename...> class ContainerType, typename ValueType, typename... Args>
void Log(const ContainerType<ValueType, Args...> & c) {
out_ << '{';
size_t index = 0;
const size_t count = c.size();
for (const auto & v : c) {
out_ << v;
if (++index != count) {
out_ << ',';
}
}
out_ << '}';
}
};
} // namespace alohalytics
#define ATRACE(...) alohalytics::Logger(__FILE__, __LINE__).Log(__VA_ARGS__)
#define ALOG(...) alohalytics::Logger().Log(__VA_ARGS__)
#define ATLOG(...) alohalytics::Logger().Log(__VA_ARGS__)
#endif
|