c的日志库

c的json库不知道啥时候才有心情把它写完

我想的是先看看网络之类的再去完一下c的json库

最近又有了个新的玩具，做了一个天猫书店的抓取代码，php写的，打算把它用c重复来一遍，练练手~~

头文件

//
//  log.h
//  tmail_spider
//
//  Created by bikang on 16/9/20.
//  Copyright (c) 2016年 bikang. All rights reserved.
//

#ifndef __tmail_spider__log__
#define __tmail_spider__log__


#include 
#include
#include 
#include "common.h"

//error string
#define ERROR_STR() (errno == 0 ? "no error":strerror(errno))

//error
#define LOG_ERROR(M,...)\
fprintf(stderr, "[error](%s:%d,strerror:%s)"M"",__FILE__,__LINE__,ERROR_STR(),##__VA_ARGS__);

//info
#define LOG_INFO(M,...)\
fprintf(stderr, "[error](%s:%d)"M"",__FILE__,__LINE__,##__VA_ARGS__);


//error in file
void log_file(char* cate,int cate_len,const char *filename,const char *str,int len);
void log_error_file(const char *filename,const char *str,int len);
void log_info_file(const char *filename,const char *str,int len);

//error in file more data 运行传递多个参数








#endif /* defined(__tmail_spider__log__) */

实现

//
//  log.c
//  tmail_spider
//
//  Created by bikang on 16/9/20.
//  Copyright (c) 2016年 bikang. All rights reserved.
//
#include 
#include 
#include "log.h"

#define ERROR_STR "error|"
#define ERROR_STR_LEN 6
#define INFO_STR "info|"
#define INFO_STR_LEN 5


void log_file(char* cate,int cate_len,const char *filename,const char *str,int len){
    FILE *fp = fopen(filename, "a+");
    if(fp != NULL){
        char date_str[30];
        getLocalTime(date_str,1);
        fwrite(date_str, strlen(date_str), 1, fp);
        fwrite(cate, cate_len, 1, fp);
        fwrite(str, len, 1, fp);
        fwrite("\n", 2, 1, fp);
        fclose(fp);
    }
    return;
}

void log_error_file(const char *filename,const char *str,int len){
    log_file(ERROR_STR,ERROR_STR_LEN,filename,str,len);
}
void log_info_file(const char *filename,const char *str,int len){
    log_file(INFO_STR,INFO_STR_LEN,filename,str,len);
}

公共文件

//
//  common.h
//  tmail_spider
//
//  Created by bikang on 16/9/20.
//  Copyright (c) 2016年 bikang. All rights reserved.
//

#ifndef __tmail_spider__common__
#define __tmail_spider__common__

#include 


void getLocalTime(char*date_str,int flag);


#endif /* defined(__tmail_spider__common__) */

实现

//
//  common.c
//  tmail_spider
//
//  Created by bikang on 16/9/20.
//  Copyright (c) 2016年 bikang. All rights reserved.
//

#include "common.h"
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include <sys/time.h>

void getLocalTime(char*date_str,int flag){
    struct tm *nowdate;
    time_t now;
    time(&now);
    nowdate = localtime(&now);
    if(flag == 1){
        sprintf(date_str,"%d-%02d-%02d %02d:%02d:%02d|",(nowdate->tm_year+1900),nowdate->tm_mon+1,nowdate->tm_mday,nowdate->tm_hour,nowdate->tm_min,nowdate->tm_sec);
    }else{
        sprintf(date_str,"%d-%02d-%02d %02d:%02d:%02d",(nowdate->tm_year+1900),nowdate->tm_mon+1,nowdate->tm_mday,nowdate->tm_hour,nowdate->tm_min,nowdate->tm_sec);
    }
}

测试

//
//  main.c
//  tmail_spider
//
//  Created by bikang on 16/9/20.
//  Copyright (c) 2016年 bikang. All rights reserved.
//

#include
#include
#include
#include
#include "log.h"
#include "common.h"

//test error
void test_error();
//test log
void test_show_error();
//test file log
void test_file_error();


int main(int argc, const char * argv[]) {
    //test_error();
    //test_show_error();
    test_file_error();
    return 0;
}

void test_file_error(){
    char filename[20] = "/tmp/1.txt";
    char mesg[20] = "error mesg可是";
    log_error_file(filename,mesg,sizeof(mesg));
    log_info_file(filename,mesg,sizeof(mesg));

    printf("log file end");
}


void test_show_error(){
    printf("\n");
    LOG_ERROR("error");
    printf("\n");
    LOG_INFO("info");
}

void test_error()
{
    printf("error:%s\n",strerror(1));
    FILE*fp;
    extern int errno;
    char*message;
    if(NULL==(fp=fopen("/dev/dsp","r+")))
    {
        printf("errno=%d\n",errno);
        message=strerror(errno);
        printf("Mesg:%s\n",message);
    }
    //exit(0);
}