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103 lines
2.8 KiB
103 lines
2.8 KiB
// Copyright (C) 2011 The Libphonenumber Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Author: Philippe Liard
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#ifndef I18N_PHONENUMBERS_LOGGER_H_
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#define I18N_PHONENUMBERS_LOGGER_H_
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#include <cstdio>
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#include <string>
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namespace i18n {
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namespace phonenumbers {
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using std::string;
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enum {
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LOG_FATAL = 1,
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LOG_ERROR,
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LOG_WARNING,
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LOG_INFO,
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LOG_DEBUG,
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};
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enum {
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DFATAL = LOG_FATAL,
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// ERROR seems to be defined on MSVC, therefore don't overwrite it.
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#ifndef ERROR
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ERROR = LOG_ERROR,
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#endif
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WARNING = LOG_WARNING,
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};
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// Subclass this abstract class to override the way logging is handled in the
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// library. You can then call the PhoneNumberUtil::SetLogger() method.
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class Logger {
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public:
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Logger() : level_(LOG_ERROR) {}
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virtual ~Logger() {}
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// Writes the message level to the underlying output stream.
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virtual void WriteLevel() {}
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// Writes the provided message to the underlying output stream.
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virtual void WriteMessage(const string& msg) = 0;
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// Note that if set_verbosity_level has been used to set the level to a value
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// that is not represented by an enum, the result here will be a log
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// level that is higher than LOG_DEBUG.
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inline int level() const {
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return level_;
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}
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inline void set_level(int level) {
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level_ = level;
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}
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// If you want to see verbose logs in addition to other logs, use this method.
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// This will result in all log messages at the levels above being shown, along
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// with calls to VLOG with the verbosity level set to this level or lower.
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// For example, set_verbosity_level(2) will show calls of VLOG(1) and VLOG(2)
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// but not VLOG(3), along with all calls to LOG().
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inline void set_verbosity_level(int verbose_logs_level) {
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set_level(LOG_DEBUG + verbose_logs_level);
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}
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static inline Logger* set_logger_impl(Logger* logger) {
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impl_ = logger;
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return logger;
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}
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static inline Logger* mutable_logger_impl() {
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return impl_;
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}
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private:
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static Logger* impl_;
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int level_;
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};
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// Logger that does not log anything. It could be useful to "mute" the
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// phonenumber library.
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class NullLogger : public Logger {
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public:
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virtual ~NullLogger() {}
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virtual void WriteMessage(const string& /* msg */) {}
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};
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} // namespace phonenumbers
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} // namespace i18n
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#endif // I18N_PHONENUMBERS_LOGGER_ADAPTER_H_
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