tracker/readraw/readtrailer.c

/*
 * include needed system headers
 */
#include <stdio.h>       /* include standard i/o library */
#include <stdlib.h>      /* include standard library */
#include <string.h>      /* include string library */
#include <unistd.h>      /* include unix standard library */
#include <sys/types.h>   /* */
#include <sys/stat.h>    /* */
#include <fcntl.h>       /* */
#include <errno.h>       /* error simbol definitions */
#include <time.h>        /* system time definitions */
#include <math.h>        /* math library */

void readtrailer_(unsigned short *trailer, int *error, int *fd)

{
    int nread;
    int i;
    unsigned short word;

    *error=0;

/*** read the buffer ***/
    nread=read(*fd, trailer, 2*3);//il trailer e' lungo 6 parole da 8 bits
    if( nread==0 ) {
        printf("readtrailer: Unexpected end of file %d at %d \n",*fd,nread);
        *error=1;
        return ;
    }
    if ( nread != 6) {
        printf("readtrailer: Error on reading: nread = %d \n",nread);
        *error=-1;
        return ; 
    }


/*** correct byte ***/ //endianess...
    for(i=0; i<3; i++) {
        word = trailer[i];
        trailer[i] = ( (word&0x00ff) << 8 ) | ( (word&0xff00) >> 8 );
    }

//    for( i=0; i<3; i++) printf("%x \n",trailer[i]);//???

    return; 
}
1	kusanagi	1.1	/*
2			* include needed system headers
3			*/
4			#include <stdio.h> /* include standard i/o library */
5			#include <stdlib.h> /* include standard library */
6			#include <string.h> /* include string library */
7			#include <unistd.h> /* include unix standard library */
8			#include <sys/types.h> /* */
9			#include <sys/stat.h> /* */
10			#include <fcntl.h> /* */
11			#include <errno.h> /* error simbol definitions */
12			#include <time.h> /* system time definitions */
13			#include <math.h> /* math library */
14
15			void readtrailer_(unsigned short trailer, int error, int *fd)
16
17			{
18			int nread;
19			int i;
20			unsigned short word;
21
22			*error=0;
23
24			/* read the buffer */
25			nread=read(fd, trailer, 23);//il trailer e' lungo 6 parole da 8 bits
26			if( nread==0 ) {
27			printf("readtrailer: Unexpected end of file %d at %d \n",*fd,nread);
28			*error=1;
29			return ;
30			}
31			if ( nread != 6) {
32			printf("readtrailer: Error on reading: nread = %d \n",nread);
33			*error=-1;
34			return ;
35			}
36
37
38			/* correct byte */ //endianess...
39			for(i=0; i<3; i++) {
40			word = trailer[i];
41			trailer[i] = ( (word&0x00ff) << 8 ) \| ( (word&0xff00) >> 8 );
42			}
43
44			// for( i=0; i<3; i++) printf("%x \n",trailer[i]);//???
45
46			return;
47			}