53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
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/*
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Copyright (C) Matthew Chapman 2003
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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., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#define SECTOR_BITS 9
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#define SECTOR_SIZE (1 << SECTOR_BITS)
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#define SECTOR_MASK (SECTOR_SIZE - 1)
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#define L1_BITS (SECTOR_BITS - 3)
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#define L1_SIZE (1 << L1_BITS)
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#define L1_MASK (L1_SIZE - 1)
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#define L2_BITS SECTOR_BITS
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#define L2_SIZE (1 << L2_BITS)
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#define L2_MASK (L2_SIZE - 1)
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#define MIN(x,y) (((x) < (y)) ? (x) : (y))
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struct cowdisk_header
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{
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char magic[4]; /* COWD */
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uint32_t version;
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uint32_t flags;
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uint32_t disk_sectors;
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uint32_t granularity;
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uint32_t l1dir_sector;
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uint32_t l1dir_size;
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uint32_t file_sectors;
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uint32_t cylinders;
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uint32_t heads;
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uint32_t sectors_per_track;
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};
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struct cowdisk_header2
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{
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uint32_t parent_ts;
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uint32_t timestamp;
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};
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