一个荐取AGPS信息的函数

最终的代码，我写的就是注释掉的，一开始没加break,会产生重复的信息存在下一个数组中。并且每来一个信息都要比较也比较费时，而通过解析信息的，第9位，也就是消息是第几条，放在不同的数组中，这样不会重复。这是梁老师的advice .谢谢他

static void add_NMEAListener(UINT8* message, UINT16 messageLength)
{
        char number;
        if (message != NULL)
        {
            printf("Obtain message is %s", message);
            
            if(strstr( message,"GPGSV" )!= NULL)// have satellite information

            {

                strncpy( &number, message+9, 1);
                printf(" array number is %c \n",number);
                if( number == '1' ){
                   printf("put into message_save[0]\n");
                 strcpy( message_save[0],message);
                }
                else if( number == '2' ){
                   printf(" put into messsage_save[1]\n");
                 strcpy( message_save[1],message);
                }
                else if( number == '3'){
                   printf( "put into message_save[2]\n " );
                 strcpy( message_save[2],message);
                }
                else{
                   printf( "invalid message\n");
                }

             /*
             int i=0;
             do
             {
             if( strcmp( message,message_save[i]))// compare to avoid repeating
                 {
                             strcpy( message_save[message_counter],message);
             message_counter++;
                 }
                 else
                 {
                        break;
                 }
                
             }while( i++                
             if(message_counter==3){
                  message_counter=0;
             }*/
            }    
            
        }
        
}