C++日志记录类logging.docx

C+日志记录类logging/ Copyright (c) 2012 Ohyo net work. All rights reserved./ 2012/01/04/ logging.h/ #ifndef _INCLUDE_LOGGING_H_#define _INCLUDE_LOGGING_H_ #include "str_conv.inl"#include <iostream>#include <sstream>#include <string>#include <cstring>#include <fstream> #ifdef _WIN32#include <windows.h>#include <shlobj.h>#include <shlwapi.h>#pragma comment(lib, "shlwapi.lib")#else#include <locale.h>#include <string.h>#endif #ifndef BEGIN_NAMESPACE#define BEGIN_NAMESPACE(x) namespace x #endif #ifndef END_NAMESPACE#define END_NAMESPACE(x) #endif #ifndef DISALLOW_COPY_AND_ASSIGN#define DISALLOW_COPY_AND_ASSIGN(TypeName)TypeName(const TypeName&);void operator=(const TypeName&)#endif BEGIN_NAMESPACE(logging) enum LOG_LEVEL LOG_NONE= 0,LOG_DEBUG= 1<< 0,LOG_INFO= 1<< 1,LOG_WARNING= 1<< 2,LOG_ERROR= 1<< 3,LOG_EXCEPTION= 1<< 4, _LOG_ALL_= 0xFFFFFFFF; #if defined(_DEBUG)_declspec(selectany) volatile unsigned long g_dwLogLevel = static_cast<unsigned long>(_LOG_ALL_);#else/release版本 不记录任何信息._declspec(selectany) volatile unsigned long g_dwLogLevel = static_cast<unsigned long>(LOG_NONE);#endif const char *const G_pwszLogLevel = "NONE","DEBUG","INFO","WARNING","ERROR","EXCEPTION" #ifndef _FUNCTION_W_#define WIDEN2(x) L # x#define WIDEN(x) WIDEN2(x)#define _FUNCTION_W_ WIDEN(_FUNCTION_)#endif class logprivate:DISALLOW_COPY_AND_ASSIGN(log); protected:LOG_LEVELm_LogLevel;const char*pfile;std:ostringstream m_stream; public:explicit log(LOG_LEVEL leval, const char *pszFile, int iLine)m_LogLevel = leval;m_stream << ""switch(m_LogLevel)case LOG_DEBUG:m_stream << G_pwszLogLevel1;break;case LOG_INFO:m_stream << G_pwszLogLevel2;break;case LOG_WARNING:m_stream << G_pwszLogLevel3;break;case LOG_ERROR:m_stream << G_pwszLogLevel4;break;case LOG_EXCEPTION:m_stream << G_pwszLogLevel5;break;default:m_stream << G_pwszLogLevel0;break;SYSTEMTIME st;:GetLocalTime(&st);char szTime128 = 0;:wnsprintfA(szTime, _countof(szTime), "%04u-%02u-%02u_%02u:%02u:%02u_%03u_%u ",st.wYear, st.wMonth, st.wDay,st.wHour, st.wMinute, st.wSecond, st.wMilliseconds, st.wDayOfWeek);m_stream << " " << szTime << pszFile << ":" << iLine << " "log()if(m_LogLevel & GetLogLevel()m_stream << std:endl;std:string str_newline(m_stream.str(); CheckLogDir(); std:ofstreamoutfile(GetLogFileName(), std:ios:app);outfile << str_newline;/std:cout << wstr_newline;m_LogLevel = LOG_NONE; std:ostream& stream() return m_stream; private:static BOOL CheckLogDir(void)wchar_twszLogFileMAX_PATH;:StrCpyNW(wszLogFile, GetLogFileName(), _countof(wszLogFile);:PathAppendW(wszLogFile, L"."); if( ! :PathFileExistsW(wszLogFile)/判断文件夹是否存在:SHCreateDirectoryExW(NULL, wszLogFile, NULL);/创建多级文件夹return TRUE;public: static wchar_t* GetLogFileName(void)#if defined(_MSC_VER)static wchar_twszLogFileMAX_PATH = 0;if( ! wszLogFile0)LPITEMIDLISTlpIdl = NULL;if(S_OK = :SHGetSpecialFolderLocation(NULL, CSIDL_PERSONAL, &lpIdl) && lpIdl):SHGetPathFromIDListW(lpIdl, wszLogFile);:PathAppendW(wszLogFile, L"DouXieDxGame.log");:CoTaskMemFree(static_cast<void*>(lpIdl); return wszLogFile;#else/TODO#endif #if defined(_MSC_VER)/这个类用于保留Last error值/ Stores the current value of GetLastError in the constructor and restores/ it in the destructor by calling SetLastError./ This is useful since the LogMessage class uses a lot of Win32 calls/ that will lose the value of GLE and the code that called the log function/ will have lost the thread error value when the log call returns.class CSaveLastError public:CSaveLastError() m_dwLastErrorCode = :GetLastError(); CSaveLastError() :SetLastError(m_dwLastErrorCode); unsigned long GLE() const return m_dwLastErrorCode; protected:unsigned long m_dwLastErrorCode;CSaveLastError m_last_error;#endif public:static unsigned long SetLogLevel(unsigned long dwNewLevel)unsigned long old = g_dwLogLevel;g_dwLogLevel = dwNewLevel;return (old);static unsigned long GetLogLevel(void)return (g_dwLogLevel); / This class is used to explicitly ignore values in the conditional/ logging macros. This avoids compiler warnings like "value computed/ is not used" and "statement has no effect".class VoidifyLog public:VoidifyLog() / This has to be an operator with a precedence lower than << but/ higher than ?:void operator&(std:ostream&) ; #define LOG_IS_ON(severity) (severity & :logging:g_dwLogLevel) #define LAZY_STREAM(stream, condition) !(condition) ? (void) 0 : :logging:VoidifyLog() & (stream) #define LOG_STREAM(severity) :logging:log(severity, _FILE_, _LINE_).stream() #ifdef _NO_LOG_#define LOG(level) LAZY_STREAM(LOG_STREAM(:logging:LOG_ # level), (0)#define LOG_IF(level, condition) LAZY_STREAM(LOG_STREAM(:logging:LOG_ # level), (0)#else#define LOG_IF(level, condition) LAZY_STREAM(LOG_STREAM(:logging:LOG_ # level), LOG_IS_ON(:logging:LOG_ # level) && (condition)#define LOG(level) LAZY_STREAM(LOG_STREAM(:logging:LOG_ # level), LOG_IS_ON(:logging:LOG_ # level)#endif _inline BOOL ResetLogFile(void):DeleteFileW(:logging:log:GetLogFileName(); SYSTEMTIME st;:GetLocalTime(&st);char szTime128 = 0;:wnsprintfA(szTime, _countof(szTime), "%04u-%02u-%02u_%02u:%02u:%02u_%03u_%u ",st.wYear, st.wMonth, st.wDay,st.wHour, st.wMinute, st.wSecond, st.wMilliseconds, st.wDayOfWeek); LOG(INFO) << "Log file reset "<< szTime;return TRUE; END_NAMESPACE(logging) #endif/ #ifndef _INCLUDE_LOGGING_H_