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longpanda 2020-04-05 00:07:50 +08:00
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75
SQUASHFS/squashfs-tools-4.4/squashfs-tools/gzip_wrapper.h Normal file
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#ifndef GZIP_WRAPPER_H
#define GZIP_WRAPPER_H
/*
* Squashfs
*
* Copyright (c) 2014
* Phillip Lougher <phillip@squashfs.org.uk>
*
* 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; if not, write to the Free Software
* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* gzip_wrapper.h
*
*/
#ifndef linux
#define __BYTE_ORDER BYTE_ORDER
#define __BIG_ENDIAN BIG_ENDIAN
#define __LITTLE_ENDIAN LITTLE_ENDIAN
#else
#include <endian.h>
#endif
#if __BYTE_ORDER == __BIG_ENDIAN
extern unsigned int inswap_le16(unsigned short);
extern unsigned int inswap_le32(unsigned int);
#define SQUASHFS_INSWAP_COMP_OPTS(s) { \
(s)->compression_level = inswap_le32((s)->compression_level); \
(s)->window_size = inswap_le16((s)->window_size); \
(s)->strategy = inswap_le16((s)->strategy); \
}
#else
#define SQUASHFS_INSWAP_COMP_OPTS(s)
#endif
/* Default compression */
#define GZIP_DEFAULT_COMPRESSION_LEVEL 9
#define GZIP_DEFAULT_WINDOW_SIZE 15
struct gzip_comp_opts {
int compression_level;
short window_size;
short strategy;
};
struct strategy {
char *name;
int strategy;
int selected;
};
struct gzip_strategy {
int strategy;
int length;
void *buffer;
};
struct gzip_stream {
z_stream stream;
int strategies;
struct gzip_strategy strategy[0];
};
#endif