citra/src/common/logging/backend.h

// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.

#pragma once

#include <chrono>
#include <cstdarg>
#include <string>
#include <utility>
#include "common/logging/log.h"

namespace Log {

class Filter;

/**
 * A log entry. Log entries are store in a structured format to permit more varied output
 * formatting on different frontends, as well as facilitating filtering and aggregation.
 */
struct Entry {
    std::chrono::microseconds timestamp;
    Class log_class;
    Level log_level;
    std::string filename;
    unsigned int line_num;
    std::string function;
    std::string message;

    Entry() = default;
    Entry(Entry&& o) = default;

    Entry& operator=(Entry&& o) = default;
    Entry& operator=(const Entry& o) = default;
};

/**
 * Returns the name of the passed log class as a C-string. Subclasses are separated by periods
 * instead of underscores as in the enumeration.
 */
const char* GetLogClassName(Class log_class);

/**
 * Returns the name of the passed log level as a C-string.
 */
const char* GetLevelName(Level log_level);

/// Creates a log entry by formatting the given source location, and message.
Entry CreateEntry(Class log_class, Level log_level, const char* filename, unsigned int line_nr,
                  const char* function, std::string message);

void SetFilter(Filter* filter);
} // namespace Log