src/libfusefdc/disk_sad.c

   1 /* disk.c: Routines for handling disk images
   2    Copyright (c) 2007-2017 Gergely Szasz
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License along
  15    with this program; if not, write to the Free Software Foundation, Inc.,
  16    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17
  18    Author contact information:
  19
  20    Philip: philip-fuse@shadowmagic.org.uk
  21
  22 */
  23
  24 //==========================================================================
  25 //
  26 //  open_sad
  27 //
  28 //==========================================================================
  29 static int open_sad (buffer_t *buffer, disk_t *d, int preindex) {
  30   int i, j, sectors, seclen;
  31
  32   d->sides = buff[18];
  33   d->cylinders = buff[19];
  34   GEOM_CHECK;
  35   sectors = buff[20];
  36   seclen = buff[21]*64;
  37   buffer->index = 22;
  38
  39   /* create a DD disk */
  40   d->density = DISK_DD;
  41   if (disk_alloc(d) != DISK_OK) return d->status;
  42
  43   for (j = 0; j < d->sides; ++j) {
  44     for (i = 0; i < d->cylinders; ++i) {
  45       if (trackgen(d, buffer, j, i, 1, sectors, seclen, preindex,
  46                    GAP_MGT_PLUSD, NO_INTERLEAVE, NO_AUTOFILL))
  47       {
  48         return (d->status = DISK_GEOM);
  49       }
  50     }
  51   }
  52
  53   return (d->status = DISK_OK);
  54 }
  55
  56
  57 //==========================================================================
  58 //
  59 //  write_sad
  60 //
  61 //==========================================================================
  62 static int write_sad (FILE *file, disk_t *d) {
  63   int i, j, sbase, sectors, seclen, mfm, cyl;
  64   uint8_t head[256];
  65
  66   if (check_disk_geom(d, &sbase, &sectors, &seclen, &mfm, &cyl) || sbase != 1) {
  67     return d->status = DISK_GEOM;
  68   }
  69
  70   if (cyl == -1) cyl = d->cylinders;
  71   memcpy(head, "Aley's disk backup", 18);
  72   head[18] = d->sides;
  73   head[19] = cyl;
  74   head[20] = sectors;
  75   head[21] = seclen*4;
  76   /* SAD head */
  77   if (fwrite(head, 22, 1, file) != 1) return (d->status = DISK_WRPART);
  78
  79   for (j = 0; j < d->sides; ++j) {
  80     for (i = 0; i < cyl; ++i) {
  81       if (savetrack(d, file, j, i, 1, sectors, seclen)) {
  82         return (d->status = DISK_GEOM);
  83       }
  84     }
  85   }
  86
  87   return (d->status = DISK_OK);
  88 }