Line data    Source code

       1             : /* ***** BEGIN LICENSE BLOCK *****
       2             :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       3             :  *
       4             :  * Copyright (C) 2002-2017 Németh László
       5             :  *
       6             :  * The contents of this file are subject to the Mozilla Public License Version
       7             :  * 1.1 (the "License"); you may not use this file except in compliance with
       8             :  * the License. You may obtain a copy of the License at
       9             :  * http://www.mozilla.org/MPL/
      10             :  *
      11             :  * Software distributed under the License is distributed on an "AS IS" basis,
      12             :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      13             :  * for the specific language governing rights and limitations under the
      14             :  * License.
      15             :  *
      16             :  * Hunspell is based on MySpell which is Copyright (C) 2002 Kevin Hendricks.
      17             :  *
      18             :  * Contributor(s): David Einstein, Davide Prina, Giuseppe Modugno,
      19             :  * Gianluca Turconi, Simon Brouwer, Noll János, Bíró Árpád,
      20             :  * Goldman Eleonóra, Sarlós Tamás, Bencsáth Boldizsár, Halácsy Péter,
      21             :  * Dvornik László, Gefferth András, Nagy Viktor, Varga Dániel, Chris Halls,
      22             :  * Rene Engelhard, Bram Moolenaar, Dafydd Jones, Harri Pitkänen
      23             :  *
      24             :  * Alternatively, the contents of this file may be used under the terms of
      25             :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      26             :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      27             :  * in which case the provisions of the GPL or the LGPL are applicable instead
      28             :  * of those above. If you wish to allow use of your version of this file only
      29             :  * under the terms of either the GPL or the LGPL, and not to allow others to
      30             :  * use your version of this file under the terms of the MPL, indicate your
      31             :  * decision by deleting the provisions above and replace them with the notice
      32             :  * and other provisions required by the GPL or the LGPL. If you do not delete
      33             :  * the provisions above, a recipient may use your version of this file under
      34             :  * the terms of any one of the MPL, the GPL or the LGPL.
      35             :  *
      36             :  * ***** END LICENSE BLOCK ***** */
      37             : 
      38             : /* hunzip: file decompression for sorted dictionaries with optional encryption,
      39             :  * algorithm: prefix-suffix encoding and 16-bit Huffman encoding */
      40             : 
      41             : #ifndef HUNZIP_HXX_
      42             : #define HUNZIP_HXX_
      43             : 
      44             : #include "hunvisapi.h"
      45             : 
      46             : #include <stdio.h>
      47             : #include <fstream>
      48             : #include <vector>
      49             : 
      50             : #define BUFSIZE 65536
      51             : #define HZIP_EXTENSION ".hz"
      52             : 
      53             : #define MSG_OPEN "error: %s: cannot open\n"
      54             : #define MSG_FORMAT "error: %s: not in hzip format\n"
      55             : #define MSG_MEMORY "error: %s: missing memory\n"
      56             : #define MSG_KEY "error: %s: missing or bad password\n"
      57             : 
      58             : struct bit {
      59             :   unsigned char c[2];
      60             :   int v[2];
      61             : };
      62             : 
      63             : class LIBHUNSPELL_DLL_EXPORTED Hunzip {
      64             :  private:
      65             :   Hunzip(const Hunzip&);
      66             :   Hunzip& operator=(const Hunzip&);
      67             : 
      68             :  protected:
      69             :   char* filename;
      70             :   std::ifstream fin;
      71             :   int bufsiz, lastbit, inc, inbits, outc;
      72             :   std::vector<bit> dec;     // code table
      73             :   char in[BUFSIZE];         // input buffer
      74             :   char out[BUFSIZE + 1];    // Huffman-decoded buffer
      75             :   char line[BUFSIZE + 50];  // decoded line
      76             :   int getcode(const char* key);
      77             :   int getbuf();
      78             :   int fail(const char* err, const char* par);
      79             : 
      80             :  public:
      81             :   Hunzip(const char* filename, const char* key = NULL);
      82             :   ~Hunzip();
      83           0 :   bool is_open() { return fin.is_open(); }
      84             :   bool getline(std::string& dest);
      85             : };
      86             : 
      87             : #endif