C++log日志实现

逃离我推掉我的手 2021-10-16 00:20 740阅读 0赞

以下是一个比较完整的log实现方式

#ifndef LOGFILE_H
    #define LOGFILE_H
    
    //#include "stdafx.h"
    //#include <stdio.h>
    //#include <string.h>
    
    //#include <algorithm>
    //
    //#include <ctime>
    //#include <sstream>
    #include <windows.h>
    
    const int LOG_INFO_HIT = 0;    //提示. 
    const int LOG_INFO_WARN = 1;   //警告.
    const int LOG_INFO_ERROR = 2;  //错误.
    const int LOG_INFO_FATAL_ERROR = 3;//严重错误.
    
    const int LOG_FILE_MAX_CHAR_NUM = 128*1024;  //一次写日志最大的缓存去。
    const int LOG_FILE_MAX_PATH = 512;       //日志文件最大的路径;
    
    #define LOG_FILE_PATH ".\\log\\"          //日志目录
    
    
    //临界区封装类
    class CLogCriticalSection
    {
    private:
    
    protected:
    
    public:
    	CLogCriticalSection();
    	virtual ~CLogCriticalSection();
    public:
    	operator CRITICAL_SECTION*();
    	CRITICAL_SECTION m_sect;
    	bool m_bLock;
    
    	bool Unlock();
    	bool Lock();
    	bool Lock(DWORD dwTimeout);
    
    };
    //自动锁对象。
    class CLogAutoLock
    {
    public:
    	CLogAutoLock::CLogAutoLock(CLogCriticalSection& SyncLock)
    		:m_SyncLock(SyncLock)
    	{
    		m_SyncLock.Lock();
    	};
    
    
    	CLogAutoLock::~CLogAutoLock(void)
    	{
    		m_SyncLock.Unlock();
    	}
    protected:
    	CLogCriticalSection& m_SyncLock;
    };
    
    //
    //C++类的LOG实现。
    //
    class CLogFile
    {
    public:
    	CLogFile(void);
    	virtual ~CLogFile(void);
    	
    
    public:
    
    	static CLogFile *Instance( )
    	{
    		static CLogFile FileLog;
    		return &FileLog;
    	}
    
    	//
    	//创建LOG文件。
    	//
    	void LOG_Start(char* pszFilename);
    	//
    	//写LOG.
    	//使用LOG的句柄,错误级别,格式化字符串.
    	//
    	void LOG_Write(int nErrorLevel,const char* pFormatStr, ...);
    	//
    	//输出一行，带回车的。
    	//
    	void LOG_WriteLine(int nErrorLevel,const char* pFormatStr,...);
    
    	//关闭LOG的句柄。
    	void LOG_Close(void);
    
    	//创建LOG目录。
    	bool LOG_CreateDir(char* pszLogDir);
    
    	//在Win32利用OutputDebugString输出一行`在这里插入代码片`
    	void LOG_DebugString(int nErrorLevel,const char* pFormatStr,...);
    protected:
    	//每天创建一个文件。
    	void LOG_CreateFile(char* pszFileName);
    	char * m_buf;
    	//文件名称。
    	char m_chFile[LOG_FILE_MAX_PATH];
    	char m_chPreFile[LOG_FILE_MAX_PATH];
    
    	//保存LOG句柄.
    	HANDLE m_hLog;
        CLogCriticalSection m_csLock;
    };
    
    
    
    #endif

以下是实现方式

#include "stdafx.h"
    #include "logfile.h"
    #include <string>
    
    #pragma warning( disable : 4996 )
    
    //
    //
    //
    CLogFile::CLogFile(void)
    {
    	m_hLog = NULL;
    
    	memset(m_chFile, 0, LOG_FILE_MAX_PATH);
    	memset(m_chPreFile, 0, LOG_FILE_MAX_PATH);
    }
    //
    //
    //
    CLogFile::~CLogFile(void)
    {
    }
    //
    //创建LOG文件。
    //
    void CLogFile::LOG_Start(char* pszFilename)
    {
    	if (strlen(pszFilename) <= 0)
    	{
    		//TRACE0("LOG filename is empty error!\n");
    		return;
    	}
    	CLogAutoLock autoLock(m_csLock);
    
    	//
    	strcpy(m_chPreFile,pszFilename);
    	//
    	LOG_CreateDir(pszFilename);
    	LOG_CreateFile(m_chPreFile);
    
    }
    //
    //写LOG.
    //使用LOG的句柄,错误级别,格式化字符串.
    //
    void CLogFile::LOG_Write(int nErrorLevel,const char* pFormatStr, ...)
    {
    //	return;
    	const int nBufSize = LOG_FILE_MAX_CHAR_NUM;
    	char Buf[nBufSize]={0};
    
    
    	CLogAutoLock autoLock(m_csLock);
    
    	//
    	LOG_CreateFile(m_chPreFile);
    
    	if (m_hLog == NULL)
    	{
    		//TRACE0("LOG_Write ERROR!\n");
    		return;
    	}
    
    	std::string strValue;
    
    	char Level[32];
    	if (nErrorLevel == LOG_INFO_HIT)
    	{
    		strcpy(Level,"提示");
    	}
    	else if (nErrorLevel == LOG_INFO_WARN)
    	{
    		strcpy(Level,"警告");
    	}
    	else if (nErrorLevel == LOG_INFO_ERROR)
    	{
    		strcpy(Level,"错误");
    	}
    	else if (nErrorLevel == LOG_INFO_FATAL_ERROR)
    	{
    		strcpy(Level,"致命");
    	}
    	else
    	{
    		strcpy(Level,"未明");		
    	}
    
    
    	//输出时间.
    	SYSTEMTIME stToday;
    	GetLocalTime(&stToday);
    	//[2005-03-25 11:29:16] 
    	sprintf_s(Buf,nBufSize,"[%04d-%02d-%02d %02d:%02d:%02d LEVEL=%s] ",
    		stToday.wYear,stToday.wMonth,stToday.wDay,
    		stToday.wHour,stToday.wMinute,stToday.wSecond,
    		Level);
    
    	//写到LOG文件.
    	fwrite(Buf,strlen(Buf),1,(FILE*)m_hLog);
    	//
    
    	memset(Buf,0,nBufSize);
    
    	//分析输入可变参数.
    
    	va_list list;
    	va_start(list, pFormatStr);
    	vsprintf_s(Buf, pFormatStr, list);
    	va_end(list);
    	//写到LOG文件.
    	fwrite(Buf,strlen(Buf),1,(FILE*)m_hLog);
    
    	//缓冲区写到文件.
    	fflush((FILE*)m_hLog);
    
    }
    //
    //输出一行，带回车的。
    //
    void CLogFile::LOG_WriteLine(int nErrorLevel,const char* pFormatStr,...)
    {
    	CLogAutoLock autoLock(m_csLock);
    	//
    	LOG_CreateFile(m_chPreFile);
    
    
    	if (m_hLog == NULL)
    	{
    		//TRACE0("LOG_WriteLine ERROR!\n");
    		return;	
    	}
    
    	const int nBufSize = LOG_FILE_MAX_CHAR_NUM;
    	char Buf[nBufSize];
    
    	char Level[32];
    	if (nErrorLevel == LOG_INFO_HIT)
    	{
    		strcpy(Level,"提示");
    	}
    	else if (nErrorLevel == LOG_INFO_WARN)
    	{
    		strcpy(Level,"警告");
    	}
    	else if (nErrorLevel == LOG_INFO_ERROR)
    	{
    		strcpy(Level,"错误");
    	}
    	else if (nErrorLevel == LOG_INFO_FATAL_ERROR)
    	{
    		strcpy(Level,"致命");
    	}
    	else
    	{
    		strcpy(Level,"未明");
    	}
    
    
    	//输出时间.
    	SYSTEMTIME stToday;
    	GetLocalTime(&stToday);
    	//[2005-03-25 11:29:16] 
    	sprintf_s(Buf,nBufSize,"[%04d-%02d-%02d %02d:%02d:%02d LEVEL=%s] ",
    		stToday.wYear,stToday.wMonth,stToday.wDay,
    		stToday.wHour,stToday.wMinute,stToday.wSecond,
    		Level);
    
    	//写到LOG文件.
    	fwrite(Buf,strlen(Buf),1,(FILE*)m_hLog);
    	//
    
    	memset(Buf,0,nBufSize);
    
    	//分析输入可变参数.
    	va_list list;
    	va_start(list, pFormatStr);
    	vsprintf_s(Buf, pFormatStr, list);
    	va_end(list);
    
    	//写到LOG文件.
    	int nCount = fwrite(Buf,strlen(Buf),1,(FILE*)m_hLog);
    	FILE * pfile = (FILE*)m_hLog;
    	//写回车行。
    	memcpy(Buf,"\r\n",2);
    	fwrite(Buf,2,1,(FILE*)m_hLog);
    
    	//缓冲区写到文件.
    	fflush((FILE*)m_hLog);
    
    }
    //
    //关闭LOG的句柄。
    //
    void CLogFile::LOG_Close(void)
    {
    	CLogAutoLock autoLock(m_csLock);
    
    	if (m_hLog)
    	{
    		fclose((FILE*)m_hLog);
    	}
    
    
    }
    
    //
    //每天创建一个文件。
    //
    void CLogFile::LOG_CreateFile(char* pszFileName)
    {
    	//输出时间.
    	SYSTEMTIME stToday;
    	GetLocalTime(&stToday);
    
    	//生成日志文件名称
    	char chBuf[LOG_FILE_MAX_PATH];
    	sprintf_s(chBuf,LOG_FILE_MAX_PATH,"%s%04d%02d%02d%s",
    		pszFileName,stToday.wYear,stToday.wMonth,stToday.wDay,".log");
    
    	//
    	if (memcmp(m_chFile,chBuf,strlen(chBuf)) != 0)
    	{
    		if (m_hLog)
    		{
    			LOG_Close();
    		}
    
    		//
    		memcpy(m_chFile,chBuf,strlen(chBuf));
    		m_hLog = fopen(m_chFile, "a");
    		//m_hLog = fopen(m_chFile, "w+");
    
    		LOG_WriteLine(LOG_INFO_HIT, "--------------------- anzer_center server B2017.4.25 -----------------------");
    	}
    	
    }
    
    void CLogFile::LOG_DebugString(int nErrorLevel, const char* pFormatStr,...)
    {
    #if defined(_WIN32)
    	CLogAutoLock autoLock(m_csLock);
    
    	const int nBufSize = LOG_FILE_MAX_CHAR_NUM;
    	char Buf[nBufSize] = {0};
    	char Str[nBufSize] = {0};
    
    	char Level[32];
    	if (nErrorLevel == LOG_INFO_HIT)
    	{
    		strcpy(Level,"提示");
    	}
    	else if (nErrorLevel == LOG_INFO_WARN)
    	{
    		strcpy(Level,"警告");
    	}
    	else if (nErrorLevel == LOG_INFO_ERROR)
    	{
    		strcpy(Level,"错误");
    	}
    	else if (nErrorLevel == LOG_INFO_FATAL_ERROR)
    	{
    		strcpy(Level,"致命");
    	}
    	else
    	{
    		strcpy(Level,"未明");
    	}
    
    	//输出时间.
    	SYSTEMTIME stToday;
    	GetLocalTime(&stToday);
    
    	//分析输入可变参数.
    	va_list list;
    	va_start(list, pFormatStr);
    	vsprintf_s(Str, pFormatStr, list);
    	va_end(list);
    	
    	sprintf_s(Buf,nBufSize,"[%04d-%02d-%02d %02d:%02d:%02d LEVEL=%s] %s",
    		stToday.wYear,stToday.wMonth,stToday.wDay,
    		stToday.wHour,stToday.wMinute,stToday.wSecond,
    		Level, Str);
    
    	OutputDebugStringA(Buf);
    #endif
    }
    
    //
    //创建LOG目录。
    //
    bool CLogFile::LOG_CreateDir(char* pszLogDir)
    {
    	if (!CreateDirectoryA(pszLogDir,NULL))
    	{
    		DWORD dwRet = GetLastError();
    		if (dwRet != ERROR_ALREADY_EXISTS)
    		{
    			return false;
    		}
    	}
    
    	return true;
    }
    
    
    //创建临界区.
    CLogCriticalSection::CLogCriticalSection()
    {
    	::InitializeCriticalSection(&m_sect);
    	m_bLock = false;
    }
    
    //指针操作.
    CLogCriticalSection::operator CRITICAL_SECTION*()
    {
    	return (CRITICAL_SECTION*) &m_sect;
    }
    
    //删除临界区.
    CLogCriticalSection::~CLogCriticalSection()
    {
    	::DeleteCriticalSection(&m_sect);
    	m_bLock = false;
    }
    
    //锁住.
    bool CLogCriticalSection::Lock()
    {
    	::EnterCriticalSection(&m_sect);
    	m_bLock = true;
    	return true;
    }
    
    //锁住
    bool CLogCriticalSection::Lock(DWORD /* dwTimeout */)
    {
    	return Lock();
    }
    
    //解锁.
    bool CLogCriticalSection::Unlock()
    {
    	::LeaveCriticalSection(&m_sect);
    	m_bLock = false;
    
    	return true;
    }

int main()
    {
    
    //CLogFile::Instance()->LOG_Start("D:\\Log\\ServerIO.txt");
    CLogFile::Instance()->LOG_Write(1,"InitServer() udpsock:%d\n",Sock);
    
    }