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99 lines
2.8 KiB
99 lines
2.8 KiB
/*
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* Copyright (C) 2016 The Android Open Source Project
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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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*/
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#ifndef LOG_H_
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#define LOG_H_
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#include <stdarg.h>
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#include <chrono>
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#include <vector>
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namespace android {
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/*
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* Prefer to use these macros instead of calling Log::Error, etc. directly, in
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* case we want to add tracing of the source file and line number, or compile
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* out logging completely, etc.
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*/
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#define LOGE(fmt, ...) Log::Error(fmt, ##__VA_ARGS__)
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#define LOGW(fmt, ...) Log::Warn(fmt, ##__VA_ARGS__)
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#define LOGI(fmt, ...) Log::Info(fmt, ##__VA_ARGS__)
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#define LOGD(fmt, ...) Log::Debug(fmt, ##__VA_ARGS__)
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#define LOGD_BUF(buf, len) Log::DebugBuf((const uint8_t *) buf, len)
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#define LOGD_VEC(vec) Log::DebugBuf(vec)
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// Interface for a log output method
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class Logger {
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public:
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virtual ~Logger() {};
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virtual void Output(const char *str) = 0;
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virtual void Output(const char *format, va_list arg_list) = 0;
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};
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// Singleton used to log messages to an arbitrary output
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class Log {
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public:
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enum class LogLevel {
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// Use with SetLevel to disable logging
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Disable,
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Error,
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Warn,
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Info,
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Debug,
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};
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// Define the logging mechanism and minimum log level that will be printed
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static void Initialize(Logger *logger, LogLevel level);
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__attribute__((__format__ (printf, 1, 2)))
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static void Error(const char *format, ...);
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__attribute__((__format__ (printf, 1, 2)))
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static void Warn(const char *format, ...);
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__attribute__((__format__ (printf, 1, 2)))
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static void Info(const char *format, ...);
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__attribute__((__format__ (printf, 1, 2)))
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static void Debug(const char *format, ...);
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static void DebugBuf(std::vector<uint8_t> vec);
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static void DebugBuf(const uint8_t *buffer, size_t size);
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// Allows for updating the logging level after initialization
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static void SetLevel(LogLevel level);
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private:
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static char LevelAbbrev(LogLevel level);
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static void LogEx(LogLevel level, const char *format, va_list arg_list);
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static Logger* logger_;
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static LogLevel level_;
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static std::chrono::time_point<std::chrono::steady_clock> init_time_;
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};
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class PrintfLogger : public Logger {
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public:
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void Output(const char *str);
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void Output(const char *format, va_list arg_list);
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};
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} // namespace android
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#endif // LOG_H_
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