usr/src/sys/vax/vax/dkbad.c

/*      dkbad.c 4.2     81/05/09        */

#ifndef NOBADBLOCK
#include "../h/param.h"
#include "../h/buf.h"
#include "../h/dkbad.h"

/*
 * Search the bad block table looking for
 * the specified block.  Return index if found.
 * Return -1 if not found.
 */

isbad(bt, cyl, trk, sec)
        register struct dkbad *bt;
{
        register int i;
        register long blk, bblk;

#ifdef BADMAGIC
        if (bt->bt_magic != BADMAGIC)
                return (-1);
#endif
        blk = ((long)cyl << 16) + (trk << 8) + sec;
        for (i = 0; i < 126; i++) {
                bblk = ((long)bt->bt_bad[i].bt_cyl << 16) + bt->bt_bad[i].bt_trksec;
                if (blk == bblk)
                        return (i);
                if (blk < bblk || bblk < 0)
                        break;
        }
        return (-1);
}
#endif