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Diffstat (limited to 'drivers/char/ftape/compressor/zftape-compress.h')
-rw-r--r-- | drivers/char/ftape/compressor/zftape-compress.h | 83 |
1 files changed, 0 insertions, 83 deletions
diff --git a/drivers/char/ftape/compressor/zftape-compress.h b/drivers/char/ftape/compressor/zftape-compress.h deleted file mode 100644 index f200741e33b..00000000000 --- a/drivers/char/ftape/compressor/zftape-compress.h +++ /dev/null @@ -1,83 +0,0 @@ -#ifndef _ZFTAPE_COMPRESS_H -#define _ZFTAPE_COMPRESS_H -/* - * Copyright (c) 1994-1997 Claus-Justus Heine - - This program is free software; you can redistribute it and/or - modify it under the terms of the GNU General Public License as - published by the Free Software Foundation; either version 2, or (at - your option) any later version. - - This program is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; see the file COPYING. If not, write to - the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, - USA. - - * - * $Source: /homes/cvs/ftape-stacked/ftape/compressor/zftape-compress.h,v $ - * $Revision: 1.1 $ - * $Date: 1997/10/05 19:12:32 $ - * - * This file contains macros and definitions for zftape's - * builtin compression code. - * - */ - -#include "../zftape/zftape-buffers.h" -#include "../zftape/zftape-vtbl.h" -#include "../compressor/lzrw3.h" - -/* CMPR_WRK_MEM_SIZE gives the size of the compression wrk_mem */ -/* I got these out of lzrw3.c */ -#define U(X) ((__u32) X) -#define SIZE_P_BYTE (U(sizeof(__u8 *))) -#define ALIGNMENT_FUDGE (U(16)) - -#define CMPR_WRK_MEM_SIZE (U(4096)*(SIZE_P_BYTE) + ALIGNMENT_FUDGE) - -/* the maximum number of bytes the size of the "compressed" data can - * exceed the uncompressed data. As it is quite useless to compress - * data twice it is sometimes the case that it is more efficient to - * copy a block of data but to feed it to the "compression" - * algorithm. In this case there are some flag bytes or the like - * proceding the "compressed" data. THAT MUST NOT BE THE CASE for the - * algorithm we use for this driver. Instead, the high bit 15 of - * compressed_size: - * - * compressed_size = ftape_compress() - * - * must be set in such a case. - * - * Nevertheless, it might also be as for lzrw3 that there is an - * "intermediate" overrun that exceeds the amount of the compressed - * data that is actually produced. During the algorithm we need in the - * worst case MAX_CMP_GROUP bytes more than the input-size. - */ -#define MAX_CMP_GROUP (2+16*2) /* from lzrw3.c */ - -#define CMPR_OVERRUN MAX_CMP_GROUP /* during compression */ - -/****************************************************/ - -#define CMPR_BUFFER_SIZE (MAX_BLOCK_SIZE + CMPR_OVERRUN) - -/* the compression map stores the byte offset compressed blocks within - * the current volume for catridges with format code 2,3 and 5 - * (and old versions of zftape) and the offset measured in kilobytes for - * format code 4 and 6. This gives us a possible max. size of a - * compressed volume of 1024*4GIG which should be enough. - */ -typedef __u32 CmprMap; - -/* globals - */ - -/* exported functions - */ - -#endif /* _ZFTAPE_COMPRESS_H */ |