125 lines
2.6 KiB
C
125 lines
2.6 KiB
C
/*
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$Id: sector.c,v 1.6 2004/05/09 16:53:01 rocky Exp $
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Copyright (C) 2000 Herbert Valerio Riedel <hvr@gnu.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <cdio/sector.h>
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#include <cdio/util.h>
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#include "cdio_assert.h"
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#include <stdio.h>
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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static const char _rcsid[] = "$Id: sector.c,v 1.6 2004/05/09 16:53:01 rocky Exp $";
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lba_t
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cdio_lba_to_lsn (lba_t lba)
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{
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if (CDIO_INVALID_LBA == lba) return CDIO_INVALID_LSN;
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if (CDIO_PREGAP_SECTORS > lba) return lba; /* Assume no pregap?*/
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return lba - CDIO_PREGAP_SECTORS;
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}
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void
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cdio_lba_to_msf (lba_t lba, msf_t *msf)
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{
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cdio_assert (msf != 0);
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msf->m = to_bcd8 (lba / (60 * 75));
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msf->s = to_bcd8 ((lba / 75) % 60);
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msf->f = to_bcd8 (lba % 75);
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}
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/* warning, returns new allocated string */
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char *
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cdio_lba_to_msf_str (lba_t lba)
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{
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if (CDIO_INVALID_LBA == lba) {
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return strdup("*INVALID");
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} else {
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msf_t msf = { .m = 0, .s = 0, .f = 0 };
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cdio_lba_to_msf (lba, &msf);
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return cdio_msf_to_str(&msf);
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}
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}
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lba_t
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cdio_lsn_to_lba (lsn_t lsn)
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{
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if (CDIO_INVALID_LSN == lsn) return CDIO_INVALID_LBA;
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return lsn + CDIO_PREGAP_SECTORS;
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}
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void
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cdio_lsn_to_msf (lsn_t lsn, msf_t *msf)
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{
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cdio_assert (msf != 0);
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cdio_lba_to_msf(cdio_lsn_to_lba(lsn), msf);
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}
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uint32_t
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cdio_msf_to_lba (const msf_t *msf)
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{
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uint32_t lba = 0;
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cdio_assert (msf != 0);
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lba = from_bcd8 (msf->m);
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lba *= 60;
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lba += from_bcd8 (msf->s);
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lba *= 75;
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lba += from_bcd8 (msf->f);
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return lba;
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}
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uint32_t
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cdio_msf_to_lsn (const msf_t *msf)
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{
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return cdio_lba_to_lsn(cdio_msf_to_lba (msf));
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}
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/* warning, returns new allocated string */
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char *
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cdio_msf_to_str (const msf_t *msf)
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{
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char buf[16];
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snprintf (buf, sizeof (buf), "%.3x:%.2x.%.2x", msf->m, msf->s, msf->f);
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return strdup (buf);
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}
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/*
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* Local variables:
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* c-file-style: "gnu"
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*/
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