reactos/tools/hhpcomp/lzx_compress/lz_nonslide.h

   1 /*
   2     File lz_nonslide.h, part of lzxcomp library
   3     Copyright (C) 2002 Matthew T. Russotto
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU Lesser General Public License as published by
   7     the Free Software Foundation; version 2.1 only
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU Lesser General Public License for more details.
  13
  14     You should have received a copy of the GNU Lesser General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17 */
  18
  19 #if defined(_WIN32)
  20 typedef unsigned char           u_char;
  21 #endif
  22
  23 typedef struct lz_info lz_info;
  24 typedef int (*get_chars_t)(lz_info *lzi, int n, u_char *buf);
  25 typedef int (*output_match_t)(lz_info *lzi, int match_pos, int match_len);
  26 typedef void (*output_literal_t)(lz_info *lzi, u_char ch);
  27
  28 struct lz_info
  29 {
  30   int wsize; /* window size in bytes */
  31   int max_match; /* size of longest match in bytes */
  32   int min_match;
  33   u_char *block_buf;
  34   u_char *block_bufe;
  35   int block_buf_size;
  36   int chars_in_buf;
  37   int cur_loc;            /* location within stream */
  38   int block_loc;
  39   int frame_size;
  40   int max_dist;
  41   u_char **prevtab;
  42   int *lentab;
  43   short eofcount;
  44   short stop;
  45   short analysis_valid;
  46
  47   get_chars_t get_chars;
  48   output_match_t output_match;
  49   output_literal_t output_literal;
  50   void *user_data;
  51 };
  52
  53 void lz_init(lz_info *lzi, int wsize, int max_dist,
  54              int max_match, int min_match,
  55              int frame_size,
  56              get_chars_t get_chars,
  57              output_match_t output_match,
  58              output_literal_t output_literal, void *user_data);
  59
  60 void lz_release(lz_info *lzi);
  61
  62 void lz_reset(lz_info *lzi);
  63 void lz_stop_compressing(lz_info *lzi);
  64 int lz_left_to_process(lz_info *lzi); /* returns # chars read in but unprocessed */
  65 int lz_compress(lz_info *lzi, int nchars);