xref: /openbmc/linux/lib/zlib_inflate/infutil.h (revision 12619610)
1 /* infutil.h -- types and macros common to blocks and codes
2  * Copyright (C) 1995-1998 Mark Adler
3  * For conditions of distribution and use, see copyright notice in zlib.h
4  */
5 
6 /* WARNING: this file should *not* be used by applications. It is
7    part of the implementation of the compression library and is
8    subject to change. Applications should only use zlib.h.
9  */
10 
11 #ifndef _INFUTIL_H
12 #define _INFUTIL_H
13 
14 #include <linux/zlib.h>
15 #ifdef CONFIG_ZLIB_DFLTCC
16 #include "../zlib_dfltcc/dfltcc.h"
17 #include <asm/page.h>
18 #endif
19 
20 /* memory allocation for inflation */
21 
22 struct inflate_workspace {
23 	struct inflate_state inflate_state;
24 #ifdef CONFIG_ZLIB_DFLTCC
25 	struct dfltcc_state dfltcc_state;
26 	unsigned char working_window[(1 << MAX_WBITS) + PAGE_SIZE];
27 #else
28 	unsigned char working_window[(1 << MAX_WBITS)];
29 #endif
30 };
31 
32 #ifdef CONFIG_ZLIB_DFLTCC
33 /* dfltcc_state must be doubleword aligned for DFLTCC call */
34 static_assert(offsetof(struct inflate_workspace, dfltcc_state) % 8 == 0);
35 #endif
36 
37 #define WS(strm) ((struct inflate_workspace *)(strm->workspace))
38 
39 #endif
40