/* file: makeid.c	G. Moody	19 July 1983
			Last revised: 27 September 1993
Make an AHA-format ID block for a database record

Copyright (C) Massachusetts Institute of Technology 1993. All rights reserved.

Note: the record name and copyright message generated by this program are
appropriate for the MIT/BIH database but not for other databases.
*/

#include <stdio.h>
#ifndef __STDC__
extern void exit();
#endif

#include <ecg/db.h>

main(argc, argv)
int argc;
char *argv[];
{
    long ftell(), nsamp, first, last;
    int blocks, len, nann;
    static char nulls[299];
    struct DB_anninfo afarray[1];
    struct DB_siginfo dfarray[2];
    struct DB_ann annot;
    extern void db_p16(), db_p32();

    if (argc < 3) {
	(void)fprintf(stderr, "usage: %s annotator record\n", argv[0]);
	exit(1);
    }
    if ((len = strlen(argv[2])) > 5) {
	(void)fprintf(stderr, "record name must be 5 characters or less\n");
	exit(1);
    }
    afarray[0].name = argv[1]; afarray[0].stat = READ;
    if (dbinit(argv[2], afarray, 1, dfarray, 2) < 1)
	exit(2);
    nsamp = dfarray[0].nsamp;
    (void)getann(0, &annot);
    first = annot.time;
    nann = 1;
    while (getann(0, &annot) >= 0) {
	last = annot.time;
	nann++;
    }
    dbquit();

    /* Bytes 1-8: record ID (null-padded) */
    (void)printf("MIT%s", argv[2]);
    (void)fwrite(nulls, 1, 5-len, stdout);
    (void)fprintf(stderr, "MIT%s\n", argv[2]);

    /* Bytes 9-10: number of annotations */
    db_p16((unsigned)nann, stdout);
    (void)fprintf(stderr, "%d annotations\n", nann);

    /* Bytes 11-16: unused */
    (void)fwrite(nulls, 1, 6, stdout);

    /* Bytes 17-20: time of first sample in the annotated segment of the
       record, relative to the beginning of the record */
    db_p32(0L, stdout);
    (void)fprintf(stderr, "Annotated segment begins at sample 0\n");

    /* Bytes 21-24: time of last sample in the annotated segment of the record,
       relative to the beginning of the record */
    db_p32(nsamp, stdout);
    (void)fprintf(stderr, "Annotated segment ends at sample %ld\n", nsamp);

    /* Bytes 25-26: number of 512-byte logical blocks of sample data
       (nsamp * 2 bytes per sample * 2 channels / 512, rounded upward) */
    blocks = (nsamp + 127) >> 7;
    db_p16((unsigned)blocks, stdout);
    (void)fprintf(stderr, "%d blocks of sample data\n", blocks);

    /* Bytes 27-32: unused */
    (void)fwrite(nulls, 1, 6, stdout);

    /* Bytes 33-36: TOC of first annotation, relative to the beginning of the
       annotated segment */
    db_p32(first, stdout);
    (void)fprintf(stderr, "First annotation is at sample %ld\n", first);

    /* Bytes 37-40: TOC of last annotation, relative to the beginning of the
       annotated segment */
    db_p32(last, stdout);
    (void)fprintf(stderr, "Last annotation is at sample %ld\n", last);

    /* Bytes 41-42: number of 512-byte logical blocks of annotations
       (nann * 16 bytes per annotation / 512, rounded upward) */
    blocks = (nann + 31) >> 5;
    db_p16((unsigned)blocks, stdout);
    (void)fprintf(stderr, "%d blocks of annotations\n", blocks);

    /* Bytes 43-48: unused */
    (void)fwrite(nulls, 1, 6, stdout);

    /* Bytes 49-213: copyright notice */
   (void)printf("COPYRIGHT (C) MASSACHUSETTS INSTITUTE OF TECHNOLOGY AND\r\n");
    (void)printf("HARVARD UNIVERSITY, BIOMEDICAL ENGINEERING CENTER FOR\r\n");
    (void)printf("CLINICAL INSTRUMENTATION, 1993.\r\n");
    (void)printf("ALL RIGHTS RESERVED.");

    /* Bytes 214-512: unused */
    (void)fwrite(nulls, 1, 299, stdout);
    exit(0);	/*NOTREACHED*/
}