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#pragma once
#include "bmcweb_config.h"
#include <algorithm>
#include <array>
#include <cstdio>
#include <cstdlib>
#include <ctime>
#include <filesystem>
#include <iostream>
#include <sstream>
#include <string>
#include <string_view>
namespace crow
{
enum class LogLevel
{
Disabled = 0,
Debug,
Info,
Warning,
Error,
Critical,
};
// Mapping of the external loglvl name to internal loglvl
constexpr std::array<std::pair<std::string_view, crow::LogLevel>, 7>
mapLogLevelFromName{{{"disabled", crow::LogLevel::Disabled},
{"enabled", crow::LogLevel::Debug},
{"debug", crow::LogLevel::Debug},
{"info", crow::LogLevel::Info},
{"warning", crow::LogLevel::Warning},
{"error", crow::LogLevel::Error},
{"critical", crow::LogLevel::Critical}}};
constexpr crow::LogLevel getLogLevelFromName(std::string_view name)
{
const auto* iter =
std::find_if(begin(mapLogLevelFromName), end(mapLogLevelFromName),
[&name](const auto& v) { return v.first == name; });
if (iter != end(mapLogLevelFromName))
{
return iter->second;
}
return crow::LogLevel::Disabled;
}
// configured bmcweb LogLevel
constexpr crow::LogLevel bmcwebCurrentLoggingLevel =
getLogLevelFromName(bmcwebLoggingLevel);
class Logger
{
private:
//
static std::string timestamp()
{
std::string date;
date.resize(32, '\0');
time_t t = time(nullptr);
tm myTm{};
gmtime_r(&t, &myTm);
size_t sz =
strftime(date.data(), date.size(), "%Y-%m-%d %H:%M:%S", &myTm);
date.resize(sz);
return date;
}
public:
Logger([[maybe_unused]] const std::string& prefix,
[[maybe_unused]] const std::string& filename,
[[maybe_unused]] const size_t line)
{
stringstream << "(" << timestamp() << ") [" << prefix << " "
<< std::filesystem::path(filename).filename() << ":"
<< line << "] ";
}
~Logger()
{
stringstream << std::endl;
std::cerr << stringstream.str();
}
Logger(const Logger&) = delete;
Logger(Logger&&) = delete;
Logger& operator=(const Logger&) = delete;
Logger& operator=(const Logger&&) = delete;
//
template <typename T>
Logger& operator<<([[maybe_unused]] T const& value)
{
// Somewhere in the code we're implicitly casting an array to a
// pointer in logging code. It's non-trivial to find,
// so disable the check here for now
// NOLINTNEXTLINE(cppcoreguidelines-pro-bounds-array-to-pointer-decay)
stringstream << value;
return *this;
}
constexpr static LogLevel getCurrentLogLevel()
{
return bmcwebCurrentLoggingLevel;
}
constexpr static bool isLoggingEnabled()
{
return getCurrentLogLevel() >= crow::LogLevel::Debug;
}
constexpr static bool checkLoggingLevel(const LogLevel level)
{
return isLoggingEnabled() && (getCurrentLogLevel() <= level);
}
private:
//
std::ostringstream stringstream;
};
} // namespace crow
// The logging functions currently use macros. Now that we have c++20, ideally
// they'd use source_location with fixed functions, but for the moment, disable
// the check.
// NOLINTNEXTLINE(cppcoreguidelines-macro-usage)
#define BMCWEB_LOG_CRITICAL \
if constexpr (crow::Logger::checkLoggingLevel(crow::LogLevel::Critical)) \
crow::Logger("CRITICAL", __FILE__, __LINE__)
// NOLINTNEXTLINE(cppcoreguidelines-macro-usage)
#define BMCWEB_LOG_ERROR \
if constexpr (crow::Logger::checkLoggingLevel(crow::LogLevel::Error)) \
crow::Logger("ERROR", __FILE__, __LINE__)
// NOLINTNEXTLINE(cppcoreguidelines-macro-usage)
#define BMCWEB_LOG_WARNING \
if constexpr (crow::Logger::checkLoggingLevel(crow::LogLevel::Warning)) \
crow::Logger("WARNING", __FILE__, __LINE__)
// NOLINTNEXTLINE(cppcoreguidelines-macro-usage)
#define BMCWEB_LOG_INFO \
if constexpr (crow::Logger::checkLoggingLevel(crow::LogLevel::Info)) \
crow::Logger("INFO", __FILE__, __LINE__)
// NOLINTNEXTLINE(cppcoreguidelines-macro-usage)
#define BMCWEB_LOG_DEBUG \
if constexpr (crow::Logger::checkLoggingLevel(crow::LogLevel::Debug)) \
crow::Logger("DEBUG", __FILE__, __LINE__)
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