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程序调试日志,可以 通过printf直接输出到屏幕上面进行调试。在默写特定的情况下面,可以将日志保存到文件中,后期进行查阅调试。
log.h
//log.h #ifndef _ITCAST_LOG_H_ #define _ITCAST_LOG_H_ /* #define IC_NO_LOG_LEVEL 0 #define IC_DEBUG_LEVEL 1 #define IC_INFO_LEVEL 2 #define IC_WARNING_LEVEL 3 #define IC_ERROR_LEVEL 4; */ /************************************************************************/ /* const char *file:文件名称 int line:文件行号 int level:错误级别 0 -- 没有日志 1 -- debug级别 2 -- info级别 3 -- warning级别 4 -- err级别 int status:错误码 const char *fmt:可变参数 */ /************************************************************************/ //实际使用的Level extern int LogLevel[5]; void ITCAST_LOG(const char *file, int line, int level, int status, const char *fmt, ...); #endif
log.c
//log.c #define _CRT_SECURE_NO_WARNINGS #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <stdarg.h> #include <string.h> #include <stdio.h> #include <stdlib.h> #include <time.h> #include "ItcastLog.h" #define ITCAST_DEBUG_FILE_ "socketclient.log" #define ITCAST_MAX_STRING_LEN 10240 //Level类别 #define IC_NO_LOG_LEVEL 0 #define IC_DEBUG_LEVEL 1 #define IC_INFO_LEVEL 2 #define IC_WARNING_LEVEL 3 #define IC_ERROR_LEVEL 4 int LogLevel[5] = { IC_NO_LOG_LEVEL, IC_DEBUG_LEVEL, IC_INFO_LEVEL, IC_WARNING_LEVEL, IC_ERROR_LEVEL }; //Level的名称 char ICLevelName[5][10] = { "NOLOG", "DEBUG", "INFO", "WARNING", "ERROR" }; static int ITCAST_Error_GetCurTime(char* strTime) { struct tm* tmTime = NULL; size_t timeLen = 0; time_t tTime = 0; tTime = time(NULL); tmTime = localtime(&tTime); //timeLen = strftime(strTime, 33, "%Y(Y)%m(M)%d(D)%H(H)%M(M)%S(S)", tmTime); timeLen = strftime(strTime, 33, "%Y.%m.%d %H:%M:%S", tmTime); return timeLen; } static int ITCAST_Error_OpenFile(int* pf) { char fileName[1024]; memset(fileName, 0, sizeof(fileName)); #ifdef WIN32 sprintf(fileName, "c:\\debuglog\\%s", ITCAST_DEBUG_FILE_);//log文件路径 #else sprintf(fileName, "%s/log/%s", getenv("HOME"), ITCAST_DEBUG_FILE_); #endif *pf = open(fileName, O_WRONLY | O_CREAT | O_APPEND, 0666); if (*pf < 0) { return -1; } return 0; } static void ITCAST_Error_Core(const char *file, int line, int level, int status, const char *fmt, va_list args) { char str[ITCAST_MAX_STRING_LEN]; int strLen = 0; char tmpStr[64]; int tmpStrLen = 0; int pf = 0; //初始化 memset(str, 0, ITCAST_MAX_STRING_LEN); memset(tmpStr, 0, 64); //加入LOG时间 tmpStrLen = ITCAST_Error_GetCurTime(tmpStr); tmpStrLen = sprintf(str, "[%s] ", tmpStr); strLen = tmpStrLen; //加入LOG等级 tmpStrLen = sprintf(str + strLen, "[%s] ", ICLevelName[level]); strLen += tmpStrLen; //加入LOG状态 if (status != 0) { tmpStrLen = sprintf(str + strLen, "[ERRNO is %d] ", status); } else { tmpStrLen = sprintf(str + strLen, "[SUCCESS] "); } strLen += tmpStrLen; //加入LOG信息 tmpStrLen = vsprintf(str + strLen, fmt, args); strLen += tmpStrLen; //加入LOG发生文件 tmpStrLen = sprintf(str + strLen, " [%s]", file); strLen += tmpStrLen; //加入LOG发生行数 tmpStrLen = sprintf(str + strLen, " [%d]\n", line); strLen += tmpStrLen; //打开LOG文件 if (ITCAST_Error_OpenFile(&pf)) { return; } //写入LOG文件 write(pf, str, strLen); //IC_Log_Error_WriteFile(str); //关闭文件 close(pf); return; } void ITCAST_LOG(const char *file, int line, int level, int status, const char *fmt, ...) { va_list args; //判断是否需要写LOG // if(level!=IC_DEBUG_LEVEL && level!=IC_INFO_LEVEL && level!=IC_WARNING_LEVEL && level!=IC_ERROR_LEVEL) if (level == IC_NO_LOG_LEVEL) { return; } //调用核心的写LOG函数 va_start(args, fmt); ITCAST_Error_Core(file, line, level, status, fmt, args); va_end(args); return; } void main() { int rv = -3; ITCAST_LOG(__FILE__, __LINE__, LogLevel[4], rv, "func cltSocketRev2: (buflen == NULL) [%d]", rv); system("pause"); }
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原文地址:http://blog.csdn.net/waldmer/article/details/43565037