video-pc/libs/_AVPlayer2/log.cpp

#include "log.h"
#include "qtextcodec.h"
#include <Windows.h>

#define BUFF_LEN (1024)

#ifdef UNICODE
void Output(LPCWSTR szFormat, ...)
#else
void Output(const char* szFormat, ...)
#endif
{
#ifdef UNICODE
    WCHAR szBuff[BUFF_LEN + 1];

    va_list arg;
    va_start(arg, szFormat);
    _vsnwprintf_s(szBuff, _countof(szBuff), _TRUNCATE, szFormat, arg);
    //_vsnwprintf(szBuff, BUFF_LEN, szFormat, arg);
    va_end(arg);
#else
    char szBuff[BUFF_LEN];

    va_list arg;
    va_start(arg, szFormat);
    _vsnprintf(szBuff, BUFF_LEN, szFormat, arg);
    va_end(arg);
#endif

    OutputDebugString(szBuff);
}

void logOutput(const QtMsgType type, const QMessageLogContext& context, const QString& msg)
{
    QString txt, type_str;
    QString time = QDateTime::currentDateTime().toString("dd/MM/yy hh:mm:ss.zzz"); //"hh:mm:ss.zzz"

    QFileInfo file(context.file);

    switch (type) {
    case QtDebugMsg:
        type_str = "Debug";
        break;
    case QtInfoMsg:
        type_str = "Info";
        break;
    case QtWarningMsg:
        type_str = "Warning";
        break;
    case QtCriticalMsg:
        type_str = "Critical";
        break;
    case QtFatalMsg:
        type_str = "Fatal";
        abort();
    default:
        break;
    }

    if (msg.startsWith("QObject::startTimer:") || msg.startsWith("QObject::killTimer:"))
        return;

#if !NDEBUG // log to debug window with debug version
    txt = QString("[%1][%2]%3 (file:%4:%5, fun:%6)\n")
              .arg(time)
              .arg(type_str)
              .arg(msg)
              .arg(file.fileName())
              .arg(context.line)
              .arg(context.function);

#ifdef UNICODE
    Output(reinterpret_cast<LPCWSTR>(txt.toStdWString().c_str()));
#else
    Output(txt.toLocal8Bit().constData());
#endif
#else // log to file
    if (type <= QtDebugMsg)
        return;

    txt = QString("[%1][%2]%3").arg(time).arg(type_str).arg(msg);

    Logger& logger = Logger::instance();
    logger.log(txt);
#endif
}

Logger::Logger(const QString& file)
    : m_logfile(nullptr)
    , m_ts(nullptr)
{
    m_logfile = std::make_unique<QFile>(file);
    if (m_logfile) {
        if (m_logfile->open(QIODevice::WriteOnly | QIODevice::Append)) {
            m_ts = std::make_unique<QTextStream>(m_logfile.get());
            m_ts->setCodec(QTextCodec::codecForName("UTF8"));
        }
    }
}

Logger::~Logger()
{
    if (m_logfile)
        m_logfile->close();
}

void Logger::log(const QString& str)
{
    if (m_ts)
        (*m_ts) << str << Qt::endl;
}