c/c++语言log打印系统
log.h
/** log.h **/
#ifndef __LOG_H__
#define __LOG_H__
#include "stdio.h"
#include "string.h"
#include "stdlib.h"
#include "time.h"
#include "stdarg.h"
#include "unistd.h"
#define MAXLEN (2048)
#define MAXFILEPATH (512)
#define MAXFILENAME (50)
typedef enum{
ERROR_1=-1,
ERROR_2=-2,
ERROR_3=-3
}ERROR0;
typedef enum{
NONE=0,
INFO=1,
DEBUG=2,
WARN=3,
ERROR=4,
ALL=255
}LOGLEVEL;
typedef struct log{
char logtime[20];
char filepath[MAXFILEPATH];
FILE *logfile;
}LOG;
typedef struct logseting{
char filepath[MAXFILEPATH];
unsigned int maxfilelen;
unsigned char loglevel;
}LOGSET;
int LogWrite(unsigned char loglevel,char *fromat,...);
#endif /* __LOG_H__ */
log.c
/** log.c **/
/** log.c **/
#include "log.h"
#define MAXLEVELNUM (3)
LOGSET logsetting;
LOG loging;
const static char LogLevelText[4][10]={"INFO","DEBUG","WARN","ERROR"};
static char * getdate(char *date);
static char * gettime(char *date);
static unsigned char getcode(char *path){
unsigned char code=255;
if(strcmp("INFO",path)==0)
code=1;
else if(strcmp("WARN",path)==0)
code=3;
else if(strcmp("ERROR",path)==0)
code=4;
else if(strcmp("NONE",path)==0)
code=0;
else if(strcmp("DEBUG",path)==0)
code=2;
return code;
}
static unsigned char ReadConfig(char *path){
char value[512]={0x0};
char data[50]={0x0};
FILE *fpath=fopen(path,"r");
if(fpath==NULL)
return -1;
fscanf(fpath,"path=%s\n",value);
getdate(data);
gettime(data);
strcat(data,".log");
strcat(value,"/");
strcat(value,data);
if(strcmp(value,logsetting.filepath)!=0)
memcpy(logsetting.filepath,value,strlen(value));
memset(value,0,sizeof(value));
fscanf(fpath,"level=%s\n",value);
logsetting.loglevel=getcode(value);
fclose(fpath);
return 0;
}
/*
*日志设置信息
* */
static LOGSET *getlogset(){
char path[512]={0x0};
getcwd(path,sizeof(path));
strcat(path,"/log.conf");
if(access(path,F_OK)==0){
if(ReadConfig(path)!=0){
logsetting.loglevel=INFO;
logsetting.maxfilelen=4096;
}
}else{
logsetting.loglevel=INFO;
logsetting.maxfilelen=4096;
}
return &logsetting;
}
/*
*获取日期
* */
static char * getdate(char *date){
time_t timer=time(NULL);
strftime(date,11,"%Y-%m-%d",localtime(&timer));
return date;
}
/*
*获取时间
* */
static char * gettime(char *date){
char buff[5]={0x0};
time_t timer;
struct tm *tblock;
time(&timer);
tblock = gmtime(&timer);
strcat(date,"_");
snprintf(buff,sizeof(buff),"%d",tblock->tm_hour+8);
strcat(date,buff);
strcat(date,":");
snprintf(buff,sizeof(buff),"%d",tblock->tm_min);
strcat(date,buff);
strcat(date,":");
snprintf(buff,sizeof(buff),"%d",tblock->tm_sec);
strcat(date,buff);
return date;
}
/*
*设置时间
* */
static void settime(){
time_t timer=time(NULL);
strftime(loging.logtime,20,"%Y-%m-%d %H:%M:%S",localtime(&timer));
}
/*
*不定参打印
* */
static void PrintfLog(char * fromat,va_list args){
int d;
char c,*s;
while(*fromat)
{
switch(*fromat){
case 's':{
s = va_arg(args, char *);
fprintf(loging.logfile,"%s",s);
break;}
case 'd':{
d = va_arg(args, int);
fprintf(loging.logfile,"%d",d);
break;}
case 'c':{
c = (char)va_arg(args, int);
fprintf(loging.logfile,"%c",c);
break;}
default:{
if(*fromat!='%'&&*fromat!='\n')
fprintf(loging.logfile,"%c",*fromat);
break;}
}
fromat++;
}
fprintf(loging.logfile,"%s","\n");
}
static int initlog(unsigned char loglevel){
char strdate[30]={0x0};
LOGSET *logsetting;
//获取日志配置信息
if((logsetting=getlogset())==NULL){
perror("Get Log Set Fail!");
return -1;
}
if((loglevel&(logsetting->loglevel))!=loglevel)
return -1;
memset(&loging,0,sizeof(LOG));
//获取日志时间
settime();
if(strlen(logsetting->filepath)==0){
char *path=getenv("HOME");
memcpy(logsetting->filepath,path,strlen(path));
getdate(strdate);
strcat(strdate,".log");
strcat(logsetting->filepath,"/");
strcat(logsetting->filepath,strdate);
}
memcpy(loging.filepath,logsetting->filepath,MAXFILEPATH);
//打开日志文件
if(loging.logfile==NULL)
{
if(access("log",0))
{
system("mkdir log");
}
loging.logfile=fopen(loging.filepath,"a+");
}
if(loging.logfile==NULL){
perror("Open Log File Fail!---");
return -1;
}
//写入日志级别，日志时间
fprintf(loging.logfile,"[%s] [%s] ",LogLevelText[loglevel-1],loging.logtime);
return 0;
}
/*
*日志写入
* */
int LogWrite(unsigned char loglevel,char *fromat,...)
{
int rtv = -1;
va_list args;
//[为支持多线程需要加锁] pthread_mutex_lock(&mutex_log); //lock.
do{
//初始化日志
if(initlog(loglevel) != 0)
{
rtv = -1;
break;
}
//打印日志信息
va_start(args,fromat);
PrintfLog(fromat,args);
va_end(args);
//文件刷出
fflush(loging.logfile);
//日志关闭
if(loging.logfile!=NULL)
fclose(loging.logfile);
loging.logfile=NULL;
rtv = 0;
}while(0);
//[为支持多线程需要加锁] pthread_mutex_unlock(&mutex_log); //unlock.
return rtv;
}
test.c
/** test.c **/
#include "stdio.h"
#include "stdlib.h"
#include "log.h"
int main(int argv,char**argc){
printf("%s\n",argc[0]);
LogWrite(INFO,"%s","Hello World!");
LogWrite(DEBUG,"%s","H.e.l.l.o W.o.r.l.d!");
LogWrite(WARN,"%s","H e l l o W o r l d!");
LogWrite(ERROR,"%s","Hallo World!");
return 0;
}
log.conf
path=./log
level=INFO
需要在根文件夹下建立log文件夹，log信息会以追加的方式输入到该文件夹中的文件。
log文件
[INFO] [2021-11-24 22:58:16] Hello World!
[INFO] [2021-11-24 22:58:39] Hello World!
[DEBUG] [2021-11-24 22:58:39] H.e.l.l.o W.o.r.l.d!
[WARN] [2021-11-24 22:58:39] H e l l o W o r l d!
[ERROR] [2021-11-24 22:58:39] Hallo World!
[INFO] [2021-11-24 22:58:48] Hello World!
[DEBUG] [2021-11-24 22:58:48] H.e.l.l.o W.o.r.l.d!
[WARN] [2021-11-24 22:58:48] H e l l o W o r l d!
[ERROR] [2021-11-24 22:58:48] Hallo World!
2022-02-28 22:45:16 星期一
C++打印日志spdlog库
