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