syslog.cpp

#include "syslog.h"
#include <stdio.h>
#include <stdlib.h>
#include <QCoreApplication>
#include <QSettings>
#include <QDebug>
#include <QTime>
#include <QDir>

#define TIME qPrintable(QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss"))
static FILE *q_fileStream = nullptr;
static int   g_logLevel   = 0;

enum TraceLevel
{
    TL_NULL = 0,
    TL_CRIT,
    TL_ERRO,
    TL_WARN,
    TL_INFO
};

static const int g_TraceLevel [] = { TL_INFO, TL_WARN, TL_ERRO, TL_CRIT, TL_NULL };

syslog::syslog(QObject *parent) : QObject(parent)
{

}

syslog::~syslog()
{

}

 void syslog::SoftWareShutDown()
{
    if (nullptr != q_fileStream)
    {
        qDebug("Close log file.");
        fclose (q_fileStream);
        q_fileStream = nullptr;
    }
}

void myMessageOutput(QtMsgType type, const QMessageLogContext &context, const QString &msg)
{
    Q_UNUSED(type);
    Q_UNUSED(context);
    QByteArray localMsg = msg.toLocal8Bit();
    if (g_logLevel && q_fileStream)
    {
        int iLevel = g_TraceLevel[type];
        if (g_logLevel < iLevel)
        {
            return;
        }
        fprintf(q_fileStream, "%s  %s \n", TIME, localMsg.constData());
        fflush(q_fileStream);
    }
}

 void installMsgHandler(QString strLogFile)
{
    QByteArray byteArrayLogFile = strLogFile.toLatin1();

    if (nullptr != q_fileStream)
    {
        fclose (q_fileStream);
        q_fileStream = nullptr;
    }
    q_fileStream = fopen (byteArrayLogFile.constData(), "a+");
    if (nullptr != q_fileStream)
    {
        qDebug("Opened log file.");
        qInstallMessageHandler(myMessageOutput);
    }
    else
    {
        qDebug("Failed to open log file.");
    }
}

 bool syslog::isFileExist(QString fullFileName)
 {
     QFileInfo fileInfo(fullFileName);
     if(fileInfo.isFile())
     {
         return true;
     }
     return false;
 }

void syslog::installReleaseMsgHandler()
{
    QString strAppPath = QCoreApplication::applicationDirPath();
    QString strIniFile = strAppPath + "/RunInfo.ini";
    QString strLogFile;
    strLogFile =QString("%1/Omniedge.log").arg(strAppPath);
    if(isFileExist(strLogFile))
    {
        QFile file(strLogFile);
        file.remove();
    }
    QSettings pSettings(strIniFile, QSettings::IniFormat);
    g_logLevel = pSettings.value("TraceSet/TraceLevel", 4).toInt();
    installMsgHandler(strLogFile);
}