log.c

#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 "log.h"  
  
#define ITCAST_DEBUG_FILE_  "mymon.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:\\itcast\\%s",ITCAST_DEBUG_FILE_);  
#else  
    sprintf(fileName, "%s/%s", "./", 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 ;  
}