NetBSD/usr.bin/vndcompress/vndcompress.h

84 lines
2.9 KiB
C

/* $Id: vndcompress.h,v 1.1.1.1 2005/07/25 12:17:59 hubertf Exp $ */
/*
* Copyright (c) 2005 by Florian Stoehr
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Florian Stoehr
* 4. The name of Florian Stoehr may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY FLORIAN STOEHR ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* cloop2: File format
*
* All numbers are in network byte order!
*
* Offset Size Description
* 0 128 Preamble (actually Linux load instructions)
* 128 4 Block size
* 131 4 Number of blocks
* 135 8*x 64-bit compressed block start offsets (rel. to FILE (!))
* 135+8*x y Compressed blocks
*/
#ifndef __CLCONFIG_H__
#define __CLCONFIG_H__
#include <machine/bswap.h>
struct cloop_header;
void usage(void);
void vndcompress(const char *, const char *, uint32_t);
uint64_t * readheader(int, struct cloop_header *, off_t *);
void vnduncompress(const char *, const char *);
/* Size of the shell command (Linux compatibility) */
#define CLOOP_SH_SIZE 128
/* Atomic BSD block is always 512 bytes */
#define ATOMBLOCK 512
/* The default blocksize (compressed chunk) is 64 KB */
#define DEF_BLOCKSIZE 128*ATOMBLOCK
/*
* Convert a 64-bit value between network and local byte order
*/
#if (_BYTE_ORDER == _BIG_ENDIAN)
#define SWAPPER(arg) (arg)
#else
#define SWAPPER(arg) bswap64(arg)
#endif
struct cloop_header {
char sh[CLOOP_SH_SIZE];
uint32_t block_size;
uint32_t num_blocks;
};
#endif