1 files changed, 91 insertions, 0 deletions
diff --git a/logger.h b/logger.h
new file mode 100644
index 0000000..4a6d23b
--- /dev/null
+++ b/logger.h
@@ -0,0 +1,91 @@
+// 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 LogLevel {
+  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;
+
+  inline LogLevel level() const {
+    return level_;
+  }
+
+  inline void set_level(LogLevel level) {
+    level_ = 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_;
+  LogLevel 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_