arch/powerpc/boot/gunzip_util.h

   1 /*
   2  * Decompression convenience functions
   3  *
   4  * Copyright 2007 David Gibson, IBM Corporation.
   5  *
   6  * This file is licensed under the terms of the GNU General Public
   7  * License version 2.  This program is licensed "as is" without any
   8  * warranty of any kind, whether express or implied.
   9  */
  10 #ifndef _PPC_BOOT_GUNZIP_UTIL_H_
  11 #define _PPC_BOOT_GUNZIP_UTIL_H_
  12
  13 #include "zlib.h"
  14
  15 /* scratch space for gunzip; 46912 is from zlib_inflate_workspacesize() */
  16 #define GUNZIP_SCRATCH_SIZE     46912
  17
  18 struct gunzip_state {
  19         z_stream s;
  20         char scratch[46912];
  21 };
  22
  23 void gunzip_start(struct gunzip_state *state, void *src, int srclen);
  24 int gunzip_partial(struct gunzip_state *state, void *dst, int dstlen);
  25 void gunzip_exactly(struct gunzip_state *state, void *dst, int len);
  26 void gunzip_discard(struct gunzip_state *state, int len);
  27 int gunzip_finish(struct gunzip_state *state, void *dst, int len);
  28
  29 #endif /* _PPC_BOOT_GUNZIP_UTIL_H_ */
  30