133 lines
3.0 KiB
C++
133 lines
3.0 KiB
C++
// logger.h
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//
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// Copyright (C) 2021, Celestia Development Team
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//
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// Logging functions.
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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#pragma once
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#include <iosfwd>
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#include <string>
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#include <fmt/format.h>
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#include <celcompat/filesystem.h>
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template <>
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struct fmt::formatter<fs::path> : formatter<std::string>
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{
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template <typename FormatContext>
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auto format(const fs::path &path, FormatContext &ctx)
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{
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return formatter<std::string>::format(path.string(), ctx);
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}
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};
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namespace celestia::util
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{
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enum class Level
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{
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Error,
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Warning,
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Info,
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Verbose,
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Debug,
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};
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class Logger
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{
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public:
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using Stream = std::basic_ostream<char>;
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Logger();
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Logger(Level level, Stream &log, Stream &err) :
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m_level(level),
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m_log(log),
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m_err(err)
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{}
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void setLevel(Level level)
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{
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m_level = level;
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}
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template <typename... Args> inline void
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debug(const char *format, const Args&... args) const;
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template <typename... Args> inline void
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info(const char *format, const Args&... args) const;
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template <typename... Args> inline void
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verbose(const char *format, const Args&... args) const;
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template <typename... Args> inline void
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warn(const char *format, const Args&... args) const;
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template <typename... Args> inline void
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error(const char *format, const Args&... args) const;
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template <typename... Args> void
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log(Level, const char *format, const Args&... args) const;
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static Logger* g_logger;
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private:
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void vlog(Level level, fmt::string_view format, fmt::format_args args) const;
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Stream &m_log;
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Stream &m_err;
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Level m_level { Level::Info };
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};
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template <typename... Args> void
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Logger::log(Level level, const char *format, const Args&... args) const
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{
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if (level <= m_level)
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vlog(level, fmt::string_view(format), fmt::make_format_args(args...));
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}
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template <typename... Args> void
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Logger::debug(const char *format, const Args&... args) const
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{
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log(Level::Debug, format, args...);
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}
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template <typename... Args> inline void
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Logger::info(const char *format, const Args&... args) const
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{
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log(Level::Info, format, args...);
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}
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template <typename... Args> inline void
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Logger::verbose(const char *format, const Args&... args) const
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{
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log(Level::Verbose, format, args...);
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}
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template <typename... Args> inline void
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Logger::warn(const char *format, const Args&... args) const
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{
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log(Level::Warning, format, args...);
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}
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template <typename... Args> inline void
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Logger::error(const char *format, const Args&... args) const
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{
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log(Level::Error, format, args...);
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}
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Logger* GetLogger();
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Logger* CreateLogger(Level level = Level::Info);
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Logger* CreateLogger(Level level,
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Logger::Stream &log,
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Logger::Stream &err);
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void DestroyLogger();
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} // end namespace celestia::util
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