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
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