84 lines
2.9 KiB
C
84 lines
2.9 KiB
C
/* $Id: vndcompress.h,v 1.3 2011/09/06 18:45:04 joerg Exp $ */
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/*
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* Copyright (c) 2005 by Florian Stoehr
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Florian Stoehr
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* 4. The name of Florian Stoehr may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY FLORIAN STOEHR ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* cloop2: File format
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*
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* All numbers are in network byte order!
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*
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* Offset Size Description
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* 0 128 Preamble (actually Linux load instructions)
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* 128 4 Block size
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* 131 4 Number of blocks
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* 135 8*x 64-bit compressed block start offsets (rel. to FILE (!))
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* 135+8*x y Compressed blocks
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*/
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#ifndef __CLCONFIG_H__
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#define __CLCONFIG_H__
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#include <machine/bswap.h>
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struct cloop_header;
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/* Size of the shell command (Linux compatibility) */
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#define CLOOP_SH_SIZE 128
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/* Atomic BSD block is always 512 bytes */
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#define ATOMBLOCK 512
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/* The default blocksize (compressed chunk) is 64 KB */
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#define DEF_BLOCKSIZE 128*ATOMBLOCK
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/*
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* SWAPPER: Convert a 64-bit value between network and local byte order
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* SWAPPER32: Convert a 32-bit value between network and local byte order
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*/
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#if (_BYTE_ORDER == _BIG_ENDIAN)
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#define SWAPPER(arg) (arg)
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#define SWAPPER32(arg) (arg)
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#define SWAPPER16(arg) (arg)
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#else
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#define SWAPPER(arg) bswap64(arg)
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#define SWAPPER32(arg) bswap32(arg)
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#define SWAPPER16(arg) bswap16(arg)
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#endif
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struct cloop_header {
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char sh[CLOOP_SH_SIZE];
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uint32_t block_size;
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uint32_t num_blocks;
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};
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#endif
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