logging.h

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#pragma once
 
#include <cstdint>
#include <cstdio>
#include <string_view>
 
namespace cppfig {
 
enum class LogLevel : std::uint8_t { Info,
                                     Warning,
                                     Error };
 
class Logger {
public:
    static void Info(std::string_view message) { std::fprintf(stdout, "[cppfig] INFO: %.*s\n", static_cast<int>(message.size()), message.data()); }
 
    static void Warn(std::string_view message)
    {
        std::fprintf(stderr, "[cppfig] WARN: %.*s\n", static_cast<int>(message.size()), message.data());
    }
 
    static void Error(std::string_view message)
    {
        std::fprintf(stderr, "[cppfig] ERROR: %.*s\n", static_cast<int>(message.size()), message.data());
    }
 
    static void Log(LogLevel level, std::string_view message)
    {
        switch (level) {
        case LogLevel::Info:
            Info(message);
            break;
        case LogLevel::Warning:
            Warn(message);
            break;
        case LogLevel::Error:
            Error(message);
            break;
        }
    }
 
    template <typename... Args>
    static void InfoF(const char* format, Args... args)
    {
        std::fprintf(stdout, "[cppfig] INFO: ");
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wformat-nonliteral"
        std::fprintf(stdout, format, args...);
#pragma GCC diagnostic pop
        std::fprintf(stdout, "\n");
    }
 
    template <typename... Args>
    static void WarnF(const char* format, Args... args)
    {
        std::fprintf(stderr, "[cppfig] WARN: ");
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wformat-nonliteral"
        std::fprintf(stderr, format, args...);
#pragma GCC diagnostic pop
        std::fprintf(stderr, "\n");
    }
 
    template <typename... Args>
    static void ErrorF(const char* format, Args... args)
    {
        std::fprintf(stderr, "[cppfig] ERROR: ");
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wformat-nonliteral"
        std::fprintf(stderr, format, args...);
#pragma GCC diagnostic pop
        std::fprintf(stderr, "\n");
    }
};
 
}  // namespace cppfig