#include <stdlib.h>#include <stdio.h>#include <unistd.h>#include <fcntl.h>#include <sys/signal.h>//#include "types.h"#include "gps.h"#define USE_BEIJING_TIMEZONEstatic int GetComma(int num,char* str);static void UTC2BTC(date_time *GPS);static double get_double_number(char *s);void show_gps(GPS_INFO *GPS){	printf("DATE     : %ld-%02d-%02d \n",GPS->D.year,GPS->D.month,GPS->D.day);	printf("TIME     :  %02d:%02d:%02d \n",GPS->D.hour,GPS->D.minute,GPS->D.second);	printf("Latitude : %10.4f %c\n",GPS->latitude,GPS->NS);		printf("Longitude: %10.4f %c\n",GPS->longitude,GPS->EW);		printf("high     : %10.4f \n",GPS->high);		printf("STATUS   : %c\n",GPS->status);	}//////////////////////////////////////////////////////////////////////////////////解釋gps發出的數據//0      7  0   4 6   0     6 8 0        90         0  3      0        9  	//$GPRMC,091400,A,3958.9870,N,11620.3278,E,000.0,000.0,120302,005.6,W*62	//$GPGGA,091400,3958.9870,N,11620.3278,E,1,03,1.9,114.2,M,-8.3,M,,*5E	void gps_parse(char *line,GPS_INFO *GPS)////////////////////////////////////////////////////////////////////////////////{	int i,tmp,start,end;	char c;	char* buf=line;	c=buf[5];	if(c=='C'){//"GPRMC"		GPS->D.hour   =(buf[ 7]-'0')*10+(buf[ 8]-'0');		GPS->D.minute =(buf[ 9]-'0')*10+(buf[10]-'0');		GPS->D.second =(buf[11]-'0')*10+(buf[12]-'0');		tmp = GetComma(9,buf);		GPS->D.day    =(buf[tmp+0]-'0')*10+(buf[tmp+1]-'0');		GPS->D.month  =(buf[tmp+2]-'0')*10+(buf[tmp+3]-'0');		GPS->D.year   =(buf[tmp+4]-'0')*10+(buf[tmp+5]-'0')+2000;		//------------------------------		GPS->status	  =buf[GetComma(2,buf)];		GPS->latitude =get_double_number(&buf[GetComma(3,buf)]);		GPS->NS       =buf[GetComma(4,buf)];		GPS->longitude=get_double_number(&buf[GetComma(5,buf)]);		GPS->EW       =buf[GetComma(6,buf)];#ifdef USE_BEIJING_TIMEZONE		UTC2BTC(&GPS->D);#endif	}	if(c=='A'){ //"$GPGGA"		GPS->high     = get_double_number(&buf[GetComma(9,buf)]);			}}static double get_double_number(char *s){	char buf[128];	int i;	double rev;	i=GetComma(1,s);	strncpy(buf,s,i);	buf[i]=0;	rev=atof(buf);//	printf("s=%s ,buf= %s,val= %f\n",s,buf,rev);	return rev;	}//////////////////////////////////////////////////////////////////////////////////得到指定序號的逗號位置static int GetComma(int num,char *str){	int i,j=0;	int len=strlen(str);	for(i=0;i<len;i++)	{		if(str[i]==',')j++;		if(j==num)return i+1;		}	return 0;	}//#ifdef USE_BEIJING_TIMEZONE//////////////////////////////////////////////////////////////////////////////////將世界時轉換為北京時static void UTC2BTC(date_time *GPS){//***************************************************//如果秒號先出,再出時間數據,則將時間數據+1秒		GPS->second++; //加一秒		if(GPS->second>59){			GPS->second=0;			GPS->minute++;			if(GPS->minute>59){				GPS->minute=0;				GPS->hour++;			}		}	//***************************************************		GPS->hour+=8;		if(GPS->hour>23)		{			GPS->hour-=24;			GPS->day+=1;			if(GPS->month==2 ||			   		GPS->month==4 ||			   		GPS->month==6 ||			   		GPS->month==9 ||			   		GPS->month==11 ){				if(GPS->day>30){			   		GPS->day=1;					GPS->month++;				}			}			else{				if(GPS->day>31){			   		GPS->day=1;					GPS->month++;				}			}			if(GPS->year % 4 == 0 ){//		   		if(GPS->day > 29 && GPS->month ==2){		   			GPS->day=1;					GPS->month++;				}			}			else{		   		if(GPS->day>28 &&GPS->month ==2){		   			GPS->day=1;					GPS->month++;				}			}			if(GPS->month>12){				GPS->month-=12;				GPS->year++;			}				}}