Method Write

Source/Engine/Core/Log.cpp:119–179

}

void Log::Logger::Write(const StringView& msg, LogType type)
{
    const auto ptr = msg.Get();
    const auto length = msg.Length();
    if (length <= 0)
        return;
    PROFILE_MEM(Engine);

    LogLocker.Lock();
    if (IsDuringLog)
    {
        LogLocker.Unlock();
        return;
    }
    IsDuringLog = true;

    // Send message to standard process output
    if (CommandLine::Options.Std.IsTrue())
    {
#if PLATFORM_TEXT_IS_CHAR16
        StringAnsi ansi(msg);
        ansi += PLATFORM_LINE_TERMINATOR;
        printf("%s", ansi.Get());
#else
        std::wcout.write(ptr, length);
#if LOG_ENABLE_WINDOWS_SINGLE_NEW_LINE_CHAR
        if (IsWindowsSingleNewLineChar)
            std::wcout.write(TEXT("\n"), 1); // Github Actions show logs with duplicated new-line characters so skip \r
        else
#endif
        std::wcout.write(TEXT(PLATFORM_LINE_TERMINATOR), ARRAY_COUNT(PLATFORM_LINE_TERMINATOR) - 1);
#endif
    }

#if !BUILD_RELEASE
    // Send message to platform logging
    Platform::Log(msg, (int32)type);
#endif

#if LOG_ENABLE_FILE
    // Write message to log file
    constexpr int32 LogMaxWriteSize = 1 * 1024 * 1024; // 1GB
    if (LogAfterInit && LogTotalWriteSize < LogMaxWriteSize)
    {
        LogTotalWriteSize += length;
        LogFile->WriteBytes(ptr, length * sizeof(Char));
        LogFile->WriteBytes(TEXT(PLATFORM_LINE_TERMINATOR), (ARRAY_COUNT(PLATFORM_LINE_TERMINATOR) - 1) * sizeof(Char));
        if (LogTotalWriteSize >= LogMaxWriteSize)
        {
            StringView endMessage(TEXT("Trimming log file.\n\n"));
            LogFile->WriteBytes(endMessage.Get(), endMessage.Length() * sizeof(Char));
        }
#if LOG_ENABLE_AUTO_FLUSH
        LogFile->Flush();
#endif
    }
#endif