lib/zlib_inflate/infutil.h

   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