Type 5 message parsing about aisparser HOT 4 CLOSED

It shouldn't be any different than the other messages. Exactly what problem are you having?

from aisparser.

Thanks for the answer!

I'm using the following code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "portable.h"
#include "nmea.h"
#include "sixbit.h"
#include "vdm_parse.h"


int main( int argc, char *argv[] )
{
    ais_state     ais;
    char          buf[256]; 
    aismsg_5  msg_5;
    char   name[21]; 
    long   userid = 0;
    unsigned char  ship_type;

    /* Clear out the structures */
    memset( &ais, 0, sizeof( ais_state ) );

    /* Process incoming packets from stdin */
   
    if (argc<2) printf("\nTHERE'S NO INPUT!!");
    else{ 
		strcpy(buf, argv[1]);
        printf("UNO\n");
        if (assemble_vdm( &ais, buf ) == 0)
        {
			printf("DOS\n");
			/* Get the 6 bit message id */
            ais.msgid = (unsigned char) get_6bit( &ais.six_state, 6 );
            printf("Message type %u\n",ais.msgid);
            /* process message with appropriate parser */
            switch( ais.msgid ) {
                case 5:
                    if( parse_ais_5( &ais, &msg_5 ) == 0 )
                    {   
			printf("Type 5 detected \n");				
                        userid = msg_5.userid;
                        strcpy(name,msg_5.name);
                        ship_type=msg_5.ship_type;
                    }
                    break;            
                                   
            }  /* switch msgid */
            
            printf( "%d\n", ais.msgid );//Message ID
            printf( "%ld\n", userid );//MMSI
            printf( "%s\n", name);//NAME
            printf( "%u",ship_type);//SHIP_TYPE
            
        }  /* if */

	}/* if argc */
    return 0;
}

and typing in the command line one part or two part sentences I get:
lousado:~/AISdecode/aisparser> ./ais_text ' '!' AIVDM,2,1,1,A,55?MbV02;H;s<HtKR20EHE:0@T4@Dn2222222216L961O5Gf0NSQEp6ClRp8,0*1C '
UNO

lousado:~/AISdecode/aisparser> ./ais_text ' '!' AIVDM,2,1,1,A,55?MbV02;H;s<HtKR20EHE:0@T4@Dn2222222216L961O5Gf0NSQEp6ClRp8,01C '!'AIVDM,2,2,1,A,88888888880,225'
UNO

which means that the code is stopping at if (assemble_vdm( &ais, buf ) == 0) any clue of what is happening?

I guess that the problem is that the type 5 needs two sentences so the short question would be, how do these two sentences need to be joined?
All the best

from aisparser.

The parser joins them, you feed incoming text into assemble_vdm and when it has a complete message it will return 0, you can then call parse_ais_5 on the ais structure to extract all the fields from it. The problem is you aren't looping on the input. See https://github.com/bcl/aisparser/blob/master/c/examples/text/main.c for an example of reading from stdin -- it doesn't include message 5 support though, you'll have to add a case statement for that.

from aisparser.

Thanks for the answer!

My approach is a little different because I'm not interested in the 'Destination' field so I'm gonna 'cheat' my type 5 messages as they were a just one sentence (takinkg the first sentence and using a 'template' second sentence as I explain here)
I'm also not interested in a continuous stdin loop because I want to use as a function/answer to a matlab script.
Anyway I think I've figured out, thanks for your indications
All the best

from aisparser.