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fd9cd479ad
This will only allocate the log message if a log file exists and the log level is enabled. The interface forwards it's arguments to fmt::format. This gets also rid of some global state and hides it in the btop_log.cpp translation unit. Closes: https://github.com/aristocratos/btop/issues/1347
70 lines
1.8 KiB
C++
70 lines
1.8 KiB
C++
// SPDX-License-Identifier: Apache-2.0
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#pragma once
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#include <cstdint>
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#include <filesystem>
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#include <string>
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#include <string_view>
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#include <utility>
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#include <vector>
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#include <fmt/format.h>
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#include <fmt/std.h>
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namespace Logger {
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enum class Level : std::uint8_t {
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DISABLED = 0,
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ERROR = 1,
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WARNING = 2,
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INFO = 3,
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DEBUG = 4,
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};
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const std::vector<std::string> log_levels { "DISABLED", "ERROR", "WARNING", "INFO", "DEBUG" };
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namespace detail {
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auto is_enabled(Level level) -> bool;
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void log_write(Level level, const std::string_view msg);
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} // namespace detail
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void init(const std::filesystem::path& path);
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void set_log_level(Level level);
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void set_log_level(const std::string_view level);
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template<typename... T>
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inline void error(fmt::format_string<T...> fmt, T&&... args) {
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// Check if log level is enabled before allocating string.
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if (detail::is_enabled(Level::ERROR)) {
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detail::log_write(Level::ERROR, fmt::format(fmt, std::forward<T>(args)...));
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}
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}
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template<typename... T>
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inline void warning(fmt::format_string<T...> fmt, T&&... args) {
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// Check if log level is enabled before allocating string.
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if (detail::is_enabled(Level::WARNING)) {
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detail::log_write(Level::WARNING, fmt::format(fmt, std::forward<T>(args)...));
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}
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}
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template<typename... T>
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inline void info(fmt::format_string<T...> fmt, T&&... args) {
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// Check if log level is enabled before allocating string.
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if (detail::is_enabled(Level::INFO)) {
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detail::log_write(Level::INFO, fmt::format(fmt, std::forward<T>(args)...));
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}
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}
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template<typename... T>
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inline void debug(fmt::format_string<T...> fmt, T&&... args) {
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// Check if log level is enabled before allocating string.
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if (detail::is_enabled(Level::DEBUG)) {
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detail::log_write(Level::DEBUG, fmt::format(fmt, std::forward<T>(args)...));
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}
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}
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} // namespace Logger
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