C++ Log日志类轻量级支持格式化输出变量实现代码
CLog 头 代码很简单 如果需要的直接Ctrl+C ----Ctrl+V 即可
#ifndef __CLOG__
#define __CLOG__
#include <windows.h>
#include <string>
#include <fstream>
#include <tchar.h>
#include <ctime>
class CLog
{
public:
CLog();
CLog(const std::string LogFile);
~CLog();
template <class T>
static void WriteLog(T x);
//支持格式化输出多参数输出
static void WriteLogFormat(const char* format, ...);
private:
static std::string GetFilePath();
std::string m_LogFilePath;
static std::string GetSystemTimes();
static bool IsPathExist(const std::string FilePath);
};
//支持输出int double 文本
template <class T> void CLog::WriteLog(T x)
{
std::fstream of(GetFilePath(), std::ios::app);
if (!of.is_open())return;
of.seekp(std::ios::end); //设置文件指针到文件尾部
of << GetSystemTimes() <<_T("line: ")<<__LINE__<<_T(" value: ")<< x << std::endl;
of.close(); //关闭文件；
}
#endif
CLog.cpp
#include "Log.h"
CLog::CLog()
:m_LogFilePath("")
{
m_LogFilePath = GetFilePath();
if (IsPathExist(m_LogFilePath))
DeleteFile(m_LogFilePath.c_str());
}
CLog::CLog(const std::string LogFile)
:m_LogFilePath(LogFile)
{
if (IsPathExist(m_LogFilePath))
DeleteFile(m_LogFilePath.c_str());
}
CLog::~CLog()
{
}
void CLog::WriteLogFormat(const char* format, ...)
{
va_list arglist;
std::string strArgData;
char szBuffer[0x1024];
ZeroMemory(szBuffer, 0x1024);
va_start(arglist, format);
vsprintf_s(szBuffer, format, arglist);
va_end(arglist);
strArgData = szBuffer;
std::fstream of(GetFilePath(), std::ios::app);
if (!of.is_open())return;
of << GetSystemTimes() << " Line: " << __LINE__ << " Value: " << strArgData << std::endl;
of.close();
}
std::string CLog::GetFilePath()
{
std::string FlieTmp;
TCHAR szPath[MAX_PATH];
::ZeroMemory(szPath, MAX_PATH);
if (!::GetCurrentDirectory(MAX_PATH, szPath))return FlieTmp;
FlieTmp = szPath;
FlieTmp += _T("\\log.txt");
return FlieTmp;
}
std::string CLog::GetSystemTimes()
{
time_t Time;
CHAR strTime[MAX_PATH];
ZeroMemory(strTime, MAX_PATH);
time(&Time);
tm t;
localtime_s(&t, &Time);
strftime(strTime, 100, _T("%Y-%m-%d %H:%M:%S "), &t);
std::string strTimes = strTime;
return strTimes;
}
bool CLog::IsPathExist(const std::string FilePath)
{
DWORD dwAttribute = ::GetFileAttributes(FilePath.c_str());
return dwAttribute != INVALID_FILE_ATTRIBUTES;
}
好了这篇文章就介绍到这了，需要的朋友可以的参考一下。
赞 (0)