/*
Log File Library(WIN98/NT/2000)
Compile by： BC++ 5; C++ BUILDER; VC++; VC.NET;
copyright(c) 2004.5 - 2005.3 llbird wushaojian@21cn.com http://blog.csdn.net/wujian53
*/
/*
Use:
//这个代码我用工业现场24X7值守的程序纪录各种信息， 简单易用;
//一般用一个全局日志对象， 有临界排斥可以多线程安全使用。
//有两个类
class LogFile;//用户定义日志文件名
class LogFileEx;//有日志文件名自动生成功能 , 可分年月日频率生成文件名, 可指定日志存放的目录
LogFile gLog("My.Log");
gLog.Log("test", 4);//记录日志
gLog.Log("系统启动");
LogFileEx gLog(".", LogFileEx :: YEAR);//一年生成一个日志文件
LogFileEx gLog(".\\Log", LogFileEx :: MONTH);//一月生成一个日志文件
LogFileEx gLog(".\\Log", LogFileEx :: DAY);//一天生成一个日志文件
//注意日志所属目录创建失败会自动退出， 请注意目录的合法性， 文件生成频率看情况掌握
//24小时运行的程序可以每天生成一个日志文件， 以免内容过多
*/
#ifndef _LOGFILE_H
#define _LOGFILE_H
#include <assert.h>
#include <time.h>
#include <stdio.h>
#include <windows.h>
class LogFile
{
protected:
CRITICAL_SECTION _csLock;
char * _szFileName;
HANDLE _hFile;
bool OpenFile()//打开文件， 指针到文件尾
{
if(IsOpen())
return true;
if(!_szFileName)
return false;
_hFile = CreateFile(
_szFileName,
GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL
);
if(!IsOpen() && GetLastError() == 2)//打开不成功， 且因为文件不存在， 创建文件
_hFile = CreateFile(
_szFileName,
GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL,
OPEN_ALWAYS,
FILE_ATTRIBUTE_NORMAL,
NULL
);
if(IsOpen())
SetFilePointer(_hFile, 0, NULL, FILE_END);
return IsOpen();
}
DWORD Write(LPCVOID lpBuffer, DWORD dwLength)
{
DWORD dwWriteLength = 0;
if(IsOpen())
WriteFile(_hFile, lpBuffer, dwLength, &dwWriteLength, NULL);
return dwWriteLength;
}
virtual void WriteLog( LPCVOID lpBuffer, DWORD dwLength)//写日志, 可以扩展修改
{
time_t now;
char temp[21];
DWORD dwWriteLength;
if(IsOpen())
{
time(&now);
strftime(temp, 20, "%Y-%m-%d %H:%M:%S", localtime(&now));
WriteFile(_hFile, "\xd\xa#-----------------------------", 32, &dwWriteLength, NULL);
WriteFile(_hFile, temp, 19, &dwWriteLength, NULL);
WriteFile(_hFile, "-----------------------------#\xd\xa", 32, &dwWriteLength, NULL);
WriteFile(_hFile, lpBuffer, dwLength, &dwWriteLength, NULL);
WriteFile(_hFile, "\xd\xa", 2, &dwWriteLength, NULL);
FlushFileBuffers(_hFile);
}
}
void Lock() { ::EnterCriticalSection(&_csLock); }
void Unlock() { ::LeaveCriticalSection(&_csLock); }
public:
LogFile(const char *szFileName = "Log.log")//设定日志文件名
{
_szFileName = NULL;
_hFile = INVALID_HANDLE_VALUE;
::InitializeCriticalSection(&_csLock);
SetFileName(szFileName);
}
virtual ~LogFile()
{
::DeleteCriticalSection(&_csLock);
Close();
if(_szFileName)
delete []_szFileName;
}
const char * GetFileName()
{
return _szFileName;
}
void SetFileName(const char *szName)//修改文件名， 同时关闭上一个日志文件
{
assert(szName);
if(_szFileName)
delete []_szFileName;
Close();
_szFileName = new char[strlen(szName) + 1];
assert(_szFileName);
strcpy(_szFileName, szName);
}
bool IsOpen()
{
return _hFile != INVALID_HANDLE_VALUE;
}
void Close()
{
if(IsOpen())
{
CloseHandle(_hFile);
_hFile = INVALID_HANDLE_VALUE;
}
}
void Log(LPCVOID lpBuffer, DWORD dwLength)//追加日志内容
{
assert(lpBuffer);
__try
{
Lock();
if(!OpenFile())
return;
WriteLog(lpBuffer, dwLength);
}
__finally
{
Unlock();
}
}
void Log(const char *szText)
{
Log(szText, strlen(szText));
}
private://屏蔽函数
LogFile(const LogFile&);
LogFile&operator = (const LogFile&);
};
class LogFileEx : public LogFile
{
protected:
char *_szPath;
char _szLastDate[9];
int _iType;
void SetPath(const char *szPath)
{
assert(szPath);
WIN32_FIND_DATA wfd;
char temp[MAX_PATH + 1] = {0};
if(FindFirstFile(szPath, &wfd) == INVALID_HANDLE_VALUE && CreateDirectory(szPath, NULL) == 0)
{
strcat(strcpy(temp, szPath), " Create Fail. Exit Now! Error ID :");
ltoa(GetLastError(), temp + strlen(temp), 10);
MessageBox(NULL, temp, "Class LogFileEx", MB_OK);
exit(1);
}
else
{
GetFullPathName(szPath, MAX_PATH, temp, NULL);
_szPath = new char[strlen(temp) + 1];
assert(_szPath);
strcpy(_szPath, temp);
}
}
public:
enum LOG_TYPE{YEAR = 0, MONTH = 1, DAY = 2};
LogFileEx(const char *szPath = ".", LOG_TYPE iType = MONTH)
{
_szPath = NULL;
SetPath(szPath);
_iType = iType;
memset(_szLastDate, 0, 9);
}
~LogFileEx()
{
if(_szPath)
delete []_szPath;
}
const char * GetPath()
{
return _szPath;
}
void Log(LPCVOID lpBuffer, DWORD dwLength)
{
assert(lpBuffer);
char temp[10];
static const char format[3][10] = {"%Y", "%Y-%m", "%Y%m%d"};
__try
{
Lock();
time_t now = time(NULL);
strftime(temp, 9, format[_iType], localtime(&now));
if(strcmp(_szLastDate, temp) != 0)//更换文件名
{
strcat(strcpy(_szFileName, _szPath), "\\");
strcat(strcat(_szFileName, temp), ".log");
strcpy(_szLastDate, temp);
Close();
}
if(!OpenFile())
return;
WriteLog(lpBuffer, dwLength);
}
__finally
{
Unlock();
}
}
void Log(const char *szText)
{
Log(szText, strlen(szText));
}
private://屏蔽函数
LogFileEx(const LogFileEx&);
LogFileEx&operator = (const LogFileEx&);
};
#endif
