ext/hunspell/hunzip.hxx

   1 /* hunzip: file decompression for sorted dictionaries with optional encryption,
   2  * algorithm: prefix-suffix encoding and 16-bit Huffman encoding */
   3
   4 #ifndef _HUNZIP_HXX_
   5 #define _HUNZIP_HXX_
   6
   7 #include "hunvisapi.h"
   8
   9 #include <stdio.h>
  10
  11 #define BUFSIZE  65536
  12 #define HZIP_EXTENSION ".hz"
  13
  14 #define MSG_OPEN   "error: %s: cannot open\n"
  15 #define MSG_FORMAT "error: %s: not in hzip format\n"
  16 #define MSG_MEMORY "error: %s: missing memory\n"
  17 #define MSG_KEY    "error: %s: missing or bad password\n"
  18
  19 struct bit {
  20     unsigned char c[2];
  21     int v[2];
  22 };
  23
  24 class LIBHUNSPELL_DLL_EXPORTED Hunzip
  25 {
  26
  27 protected:
  28     char * filename;
  29     FILE * fin;
  30     int bufsiz, lastbit, inc, inbits, outc;
  31     struct bit * dec;        // code table
  32     char in[BUFSIZE];        // input buffer
  33     char out[BUFSIZE + 1];   // Huffman-decoded buffer
  34     char line[BUFSIZE + 50]; // decoded line
  35     int getcode(const char * key);
  36     int getbuf();
  37     int fail(const char * err, const char * par);
  38
  39 public:
  40     Hunzip(const char * filename, const char * key = NULL);
  41     ~Hunzip();
  42     const char * getline();
  43 };
  44
  45 #endif