C/C++格式化日志库实现代码
头文件如下:
/*****************************************************/
/*跨平台日志函数,Linux下与windows下亲测有效*/
/*****************************************************/
#ifndef_LOG_FORMAT_H_
#define_LOG_FORMAT_H_
//日志等级
enumLogLevel{_LOG_TRACE,_LOG_INFO,_LOG_WARN,_LOG_ERROR,_LOG_FATAL};
voidLogFormat(constchar*pszFileName,constintnLine,LogLevelLevel,constchar*Format,...);
/******************************************************/
/*日志函数调用方法_LOG(_LOG_FATAL,"%s","sss");*/
/******************************************************/
#ifndef_LOG
#define_LOG(Level,Format,...)LogFormat(__FILE__,__LINE__,Level,Format,##__VA_ARGS__)
#endif
#endif//_LOG_FORMAT_H_
源文件如下:
#include#include #include #include #ifdefined__GNUC__||definedLINUX #include #defineMY_VA_LIST_G_va_list #else #include #defineMY_VA_LISTva_list #endif #include"LogFormat.h" /* *最终生成的日志字符串最大长度,要特别注意 *超过此长度程序会崩溃,用户可以自定义长度 */ #defineLOG_MAX1024 /* *时间长度,不需要修改 */ #defineFORMAT_TIME_SIZE24 /* *日志等级字符串,与头文件中定义的枚举必须一致 */ staticstd::stringg_LogLevel[]={"TRACE","INFO","WARN","ERROR","FATAL"}; /* *内存申请函数,用户可以自定义 */ staticchar*NewBuf(constuint32_tunBufSize) { returnnewchar[unBufSize]; } /* *内存释放函数,必须与NewBuf对应 */ staticvoidDeleteBuf(char**pszBuf) { if(NULL!=*pszBuf) { delete[]*pszBuf; *pszBuf=NULL; } *pszBuf=NULL; } /* *获取当前时间字符串函数 *2018-08-0808:08:08.888 */ staticchar*GetTime() { char*pszFormatTime=NewBuf(FORMAT_TIME_SIZE); #ifdefined__GNUC__||definedLINUX structtimevaltv; structtimezonetz; gettimeofday(&tv,&tz); structtm*current_time=localtime(&tv.tv_sec); sprintf(pszFormatTime, "%04d-%02d-%02d%02d:%02d:%02d.%03d", current_time->tm_year+1900, current_time->tm_mon+1, current_time->tm_mday, current_time->tm_hour, current_time->tm_min, current_time->tm_sec, tv.tv_usec/1000); #else SYSTEMTIMEsys_time; GetLocalTime(&sys_time); #if_MSC_VER sprintf_s(pszFormatTime, FORMAT_TIME_SIZE, "%04d-%02d-%02d%02d:%02d:%02d.%03d", sys_time.wYear, sys_time.wMonth, sys_time.wDay, sys_time.wHour, sys_time.wMinute, sys_time.wSecond, sys_time.wMilliseconds); #else sprintf(pszFormatTime, "%04d-%02d-%02d%02d:%02d:%02d.%03d", sys_time.wYear, sys_time.wMonth, sys_time.wDay, sys_time.wHour, sys_time.wMinute, sys_time.wSecond, sys_time.wMilliseconds); #endif #endif returnpszFormatTime; } voidLogFormat(constchar*pszFileName,constintnLine,LogLevelLevel,constchar*Format,...) { intret=0; char*pszDescribeInfo=NewBuf(LOG_MAX); MY_VA_LISTap; va_start(ap,Format); #ifdefined__GNUC__||definedLINUX ret=vsnprintf(pszDescribeInfo, LOG_MAX, Format, ap); #else #if_MSC_VER ret=_vsnprintf_s(pszDescribeInfo, LOG_MAX, _TRUNCATE, Format, ap); #else ret=_vsnprintf(pszDescribeInfo, LOG_MAX, Format, ap); #endif #endif va_end(ap); if((LOG_MAX<=ret)||(0>ret)) { DeleteBuf(&pszDescribeInfo); return; } //组装日志,[时间][等级][文件名(行数)][自定义字符串] char*pszLog=NewBuf(LOG_MAX); char*pszTime=GetTime(); #ifdefined__GNUC__||definedLINUX ret=sprintf(pszLog, "[%s][%s][%s(%d)][%s]", pszTime, g_LogLevel[Level].c_str(), pszFileName, nLine, pszDescribeInfo); #else #if_MSC_VER ret=sprintf_s(pszLog, LOG_MAX, "[%s][%s][%s(%d)][%s]", pszTime, g_LogLevel[Level].c_str(), pszFileName, nLine, pszDescribeInfo); #else ret=sprintf(pszLog, "[%s][%s][%s(%d)][%s]", pszTime, g_LogLevel[Level].c_str(), pszFileName, nLine, pszDescribeInfo); #endif #endif //日志默认输出到控制台,用户可以自行修改 printf("%s\n",pszLog); DeleteBuf(&pszDescribeInfo); DeleteBuf(&pszLog); DeleteBuf(&pszTime); }
好了这篇文章就介绍到这，需要的朋友可以参考一下。