/* protocol.c */#include <unistd.h>#include <stdlib.h>#include <stdio.h>#include <string.h>#include "protocol.h"static int fill_content(int id, const char *msg, int num,protocol_t *ptc){	static char buf[256];	strncpy(buf,msg, num);	buf[num] = '\0';	switch(id){	case 1:	//action type		if(num == 0 )			return 0;		ptc->act_type = atoi(buf);		break;	case 2:	//user id		if(num == 0 )return 0;		ptc->usr_id = atoi(buf);		break;	case 3:	//user name		strcpy(ptc->usr_name, buf);		break;	case 4:	//user password		strcpy(ptc->usr_pwd, buf);		break;	case 5:	//order num		if(num == 0 )return 0;		ptc->order_no = atoi(buf);		break;	case 6:	//start time		//strptime(time,"%Y-%m-%d %H:%M:%S",&tim);		if(num == 0 )return 0;		ptc->time_start = (time_t)atol(buf);		break;	case 7:	//end time		//strptime(time,"%Y-%m-%d %H:%M:%S",&tim);		if(num == 0 )return 0;		ptc->time_end = (time_t)atol(buf);		break;	case 8:		if(num == 0 )return 0;		ptc->ticket_id = atoi(buf);		break;	case 9:	//train no.		strcpy(ptc->train_no, buf);		break;	case 10:	//ticket count		if(num == 0 )return 0;		ptc->ticket_count = atoi(buf);		break;	case 11:	//other infomation		strcpy(ptc->other,buf);		break;	default:	//error		return -1;	}	return 0;}/* |act_t|user id|usrname|pwd|order id|times|timee|ticketid|trainno|ticket num|other| */int parse_msg(protocol_t *ptc, const char *msg){	int i,start,end,count;	empty_msg(ptc);	if(msg[0] != '|')return -1;	start = 1;	count = 0;	for(i =1;msg[i]!= '\0';i++){		if(msg[i] == '|'){			end = i;			count ++;			if(fill_content(count,msg+start, end - start, ptc) != 0)return -1;			start = end +1;		}	}	return 0;}int format_msg(protocol_t *ptc, char *msg){	sprintf(msg,"|%d|%d|%s|%s|%d|%ld|%ld|%d|%s|%d|%s|",			ptc->act_type,			ptc->usr_id,			ptc->usr_name,			ptc->usr_pwd,			ptc->order_no,			ptc->time_start,			ptc->time_end,			ptc->ticket_id,			ptc->train_no,			ptc->ticket_count,			ptc->other);	return 0;}int empty_msg(protocol_t *ptc){	if(ptc == NULL)return -1;	ptc->act_type = 0;	ptc->usr_id = 0;	strcpy(ptc->usr_name,"");	strcpy(ptc->usr_pwd,"");	ptc->order_no = 0;	ptc->time_start = 0;	ptc->time_end = 0;	ptc->ticket_id = 0;	strcpy(ptc->train_no,"XXXX");	ptc->ticket_count =0;	strcpy(ptc->other,"");	return 0;}