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1 // Copyright (C) 2011 Google Inc. | |
2 // | |
3 // Licensed under the Apache License, Version 2.0 (the "License"); | |
4 // you may not use this file except in compliance with the License. | |
5 // You may obtain a copy of the License at | |
6 // | |
7 // http://www.apache.org/licenses/LICENSE-2.0 | |
8 // | |
9 // Unless required by applicable law or agreed to in writing, software | |
10 // distributed under the License is distributed on an "AS IS" BASIS, | |
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
12 // See the License for the specific language governing permissions and | |
13 // limitations under the License. | |
14 | |
15 // Author: Philippe Liard | |
16 | |
17 #ifndef I18N_PHONENUMBERS_LOGGER_H_ | |
18 #define I18N_PHONENUMBERS_LOGGER_H_ | |
19 | |
20 #include <cstdio> | |
21 #include <string> | |
22 | |
23 #include "base/memory/scoped_ptr.h" | |
24 | |
25 namespace i18n { | |
26 namespace phonenumbers { | |
27 | |
28 using std::string; | |
29 | |
30 enum LogLevel { | |
31 LOG_FATAL = 1, | |
32 LOG_ERROR, | |
33 LOG_WARNING, | |
34 LOG_INFO, | |
35 LOG_DEBUG, | |
36 }; | |
37 | |
38 enum { | |
39 DFATAL = LOG_FATAL, | |
40 // ERROR seems to be defined on MSVC, therefore don't overwrite it. | |
41 #ifndef ERROR | |
42 ERROR = LOG_ERROR, | |
43 #endif | |
44 WARNING = LOG_WARNING, | |
45 }; | |
46 | |
47 // Subclass this abstract class to override the way logging is handled in the | |
48 // library. You can then call the PhoneNumberUtil::SetLogger() method. | |
49 class Logger { | |
50 public: | |
51 Logger() : level_(LOG_ERROR) {} | |
52 virtual ~Logger() {} | |
53 | |
54 // Writes the message level to the underlying output stream. | |
55 virtual void WriteLevel() {} | |
56 // Writes the provided message to the underlying output stream. | |
57 virtual void WriteMessage(const string& msg) = 0; | |
58 | |
59 inline LogLevel level() const { | |
60 return level_; | |
61 } | |
62 | |
63 inline void set_level(LogLevel level) { | |
64 level_ = level; | |
65 } | |
66 | |
67 static inline void set_logger_impl(Logger* logger) { | |
68 impl_ = logger; | |
69 } | |
70 | |
71 static inline Logger* mutable_logger_impl() { | |
72 return impl_; | |
73 } | |
74 | |
75 private: | |
76 static Logger* impl_; | |
77 LogLevel level_; | |
78 }; | |
79 | |
80 // Logger that does not log anything. It could be useful to "mute" the | |
81 // phonenumber library. | |
82 class NullLogger : public Logger { | |
83 public: | |
84 virtual ~NullLogger() {} | |
85 | |
86 virtual void WriteMessage(const string& /* msg */) {} | |
87 }; | |
88 | |
89 } // namespace phonenumbers | |
90 } // namespace i18n | |
91 | |
92 #endif // I18N_PHONENUMBERS_LOGGER_ADAPTER_H_ | |
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