path: root/lib/zlib_inflate/infutil.h

/* infutil.h -- types and macros common to blocks and codes
 * Copyright (C) 1995-1998 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h 
 */

/* WARNING: this file should *not* be used by applications. It is
   part of the implementation of the compression library and is
   subject to change. Applications should only use zlib.h.
 */

#ifndef _INFUTIL_H
#define _INFUTIL_H

#include <linux/zlib.h>
#ifdef CONFIG_ZLIB_DFLTCC
#include "../zlib_dfltcc/dfltcc.h"
#include <asm/page.h>
#endif

/* memory allocation for inflation */

struct inflate_workspace {
	struct inflate_state inflate_state;
#ifdef CONFIG_ZLIB_DFLTCC
	struct dfltcc_state dfltcc_state;
	unsigned char working_window[(1 << MAX_WBITS) + PAGE_SIZE];
#else
	unsigned char working_window[(1 << MAX_WBITS)];
#endif
};

#ifdef CONFIG_ZLIB_DFLTCC
/* dfltcc_state must be doubleword aligned for DFLTCC call */
static_assert(offsetof(struct inflate_workspace, dfltcc_state) % 8 == 0);
#endif

#define WS(strm) ((struct inflate_workspace *)(strm->workspace))

#endif