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 location;
    std::string message;

    Entry() = default;

    // TODO(yuriks) Use defaulted move constructors once MSVC supports them
#define MOVE(member) member(std::move(o.member))
    Entry(Entry&& o)
        : MOVE(timestamp), MOVE(log_class), MOVE(log_level),
        MOVE(location), MOVE(message)
    {}
#undef MOVE

    Entry& operator=(const Entry&& o) {
#define MOVE(member) member = std::move(o.member)
        MOVE(timestamp);
        MOVE(log_class);
        MOVE(log_level);
        MOVE(location);
        MOVE(message);
#undef MOVE
        return *this;
    }
};

/**
 * 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,
                        const char* format, va_list args);

void SetFilter(Filter* filter);

}